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Difference between revisions of "Manual shearing machine for 3mm plate"

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{{Projekt
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|firstin=https://www.youtube.com/watch?v=Oz5MzN0Pc_M
|firstin=https://www.youtube.com/watch?v=Oz5MzN0Pc_M
|trans_status=WT
|trans_status=WT
|desc=Manufacturing project
|licence=CCBYNCSA40
|licence=CCBYNCSA40
|typeproject=Youtube
|typeproject=Youtube
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|versioning_system=yes
|versioning_system=yes
|contains_pdf_drawings=yes
|contains_pdf_drawings=yes
|technology_readyness_level=8
|technology_readyness_level=6
|TechDoc={{ProjektComponent
|Desc=
{{ProjektComponent2
|cmptitle=Description
|cmpimage=oho_cm3oho_cizalla-manual-fabricación_1.02.mp4_snapshot_05.37.jpg
|cmpimg=
The cutting shears boast a robust design made possible through thorough research of online videos and incorporation of repurposed car leaf springs that underwent a heat treatment. The end result is a durable yet environmentally conscious tool capable of handling challenging metal cutting tasks with ease.
}}
<div style="margin:20px"></div>
{{ProjektComponent2
|cmptitle= Technical data
|cmpimg=
Below are some features of the manufactured shears:
* Maximum sheet thickness: 3mm
* Maximum round bar diameter: 13mm
* Maximum plate or angle thickness: 5mm
* Cutting length: 180mm
* Dimensions: Length: 0.6m x Width: 0.6m x Height: 1m
* Weight: Approximately 23 kg
* Blade Type: Hardened 9260 steel
* Drive: Manual lever
}}
|TechDoc=
{{ProjektComponent2
|cmptitle=PDF plans
|cmptitle=PDF plans
|cmpimage=Oho cm3 002.png
|cmpimage=Oho cm3 002.png
|cmpfile1=Oho cm3 cizalla-manual-para-plancha-3mm 0.96.pdf
|cmpfile1=Oho cm3 cizalla-manual-para-plancha-3mm 0.96.pdf
}}{{ProjektComponent
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{{ProjektComponent2
|cmptitle=CAD files
|cmptitle=CAD files
|cmpimage=Oho cm3 render2.png
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|cmpfile2=oho_cm3_DWG-files.zip
|cmpfile2=oho_cm3_DWG-files.zip
|cmpfile3=oho_cm3_CAD-files2.zip
|cmpfile3=oho_cm3_CAD-files2.zip
}}
<div style="margin:20px"></div>
{{ProjektComponent2
|cmptitle=Assembly instructions
<!-- |cmpimage= -->
|cmpimg=
Here are some plans with the assembly sets and pieces, which can be detailed at [https://www.youtube.com/watch?v=l8SEEqtCDrc this link]
<div class="mw-collapsible" id="mw-customcollapsible-div2" data-origID="mw-customcollapsible-div2">
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[[File:Oho_cm3_003.png]]
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[[File:Oho_cm3_007.png]]
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[[File:Oho_cm3_016.png]]
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<div style="text-align:left;;">
<i class="mw-customtoggle-div2" style="color:#1b599a;">Zoom out</i>
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<div  class="res-img" style="width: 800px">
[[File:Oho_cm3_003.png]]
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[[File:Oho_cm3_007.png]]
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{{ProjektComponent2
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|cmptitle=Project development
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<!-- {{pdcontent1}} -->
<p>Based on the DIN 2221 standard, among others, OHO has established a series of <i class="mw-customtoggle-div1" style="color:#1b599a;">stages</i> in which the satisfactory completion of this project was carried out</p>
<!-- <p class="mw-customtoggle-div1" style="color:#1b599a;">Click to expand</p> -->
<div class="mw-collapsible" id="mw-customcollapsible-div1" data-origID="mw-customcollapsible-div1"  data-origID="mw-customcollapsible-div1"><!-- mw-collapsed -->
<h4 style="margin-top:15px"><span class="mw-headline">Feasibility study</span></h4>
<hr>
<ul>
<li>
Materials, components
<div class="row" style="width: 100%">
<div class="col-sm-6">
<p style="margin-top:0;">
Required materials & components can be sourced or replaced locally? <br>
&#x20;&#x20;&check; Yes <br>
All the materials can be located with some ease, in hardware stores, parts stores and/or junkyards
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
[[File:Oseg_cs_A1_CUTTING-SHEARS_001.jpg|300px|thumb|<small>'''Previous theoretical case, showing the exploded view'''</small>|link=https://en.oho.wiki/wiki/Cutting_shears]]
</div>
</div>
</li>
<li>
Manufacturing processes
<div class="row" style="width: 100%">
<div class="col-sm-6">
<p style="margin-top:0;">
Required manufacturing processes can be povided locally? <br>
&check; Yes <br>
In a small workshop, all the processes required for manufacturing can be achieved
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
[[File:oho_cm3_QrTWE0wVggk-1430.png|300px|thumb|<small>'''Example showing the processes involved'''</small>|link=https://www.youtube.com/watch?v=QrTWE0wVggk]]
</div>
</div>
</li>
<li>
Specific training
<div class="row" style="width: 100%">
<div class="col-sm-6">
<p style="margin-top:0;">
Is specific training for manufacturing necessary and can be provided? <br>
&check; Yes <br>
Especially when it comes to heat treatment for the blades
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
[[File:oho_cm3_Oz5MzN0Pc_M-0045.png|300px|thumb|<small>'''Cutting blades'''</small>|link=https://youtu.be/Oz5MzN0Pc_M?t=45]]
</div>
</div>
</li>
<li>
Sustainability
<div class="row" style="width: 100%">
<div class="col-sm-6">
<p style="margin-top:0;">
Do all materials and processes meet the sustainability criteria? <br>
&check; Yes <br>
It is observed that both the materials used and the manufacturing processes are [https://en.wikipedia.org/wiki/Sustainability sustainable] from an economic, social and environmental point of view
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
[[File:oho_cm3_wikipedia-sustainability1.png|300px|thumb|<small>'''Sustainability concept'''</small>|link=https://en.wikipedia.org/wiki/Sustainability]]
</div>
</div>
</li>
</ul>
<h4 style="margin-top:15px"><span class="mw-headline">Market analisis and requirements </span></h4>
<hr>
<ul>
<li>
Market analysis <br>
Analysis of the current products on the market:
<div class="row" style="width: 100%">
<div class="col-sm-12">
<p style="margin-bottom:0;">
[https://www.ebay.com/itm/181547305125 Sealey 3s/6r metal hand shear cutter cropper 13mm round 6mm cutting]
</p>
</div>
</div>
<div class="row" style="width: 100%">
<div class="col-sm-6">
<p style="margin-top:0;">
[[File:oho_cm3_YEqdlJHwmiE.jpg|300px|link=https://www.ebay.com/itm/181547305125]]
<!-- https://www.youtube.com/watch?v=YEqdlJHwmiE -->
</p>
</div>
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
* Price [USD]: 237 <br>
* Source: ebay <br>
* Country: USA <br>
* Machine condition: New <br>
* Maximum sheet thickness [mm]: 6 <br>
* Maximum round bar diameter [mm]: 13 <br>
* Cutting length [mm]: 180 <br>
* High hardness steel blade: Yes <br>
* To screw on a metal bench: Yes
</p>
</div>
</div>
<div class="row" style="width: 100%">
<div class="col-sm-12">
<p style="margin-bottom:0;">
[https://www.ebay.com/itm/194499027198 5" Length Sheet Metal Plate Cutting Bench Hand Shear Machine Toolsmillar]
</p>
</div>
</div>
<div class="row" style="width: 100%">
<div class="col-sm-6">
<p style="margin-top:0;">
[[File:oho_cm3_C5nvVqsjo9Q.jpg|300px|link=https://www.ebay.com/itm/194499027198]]
<!-- https://www.youtube.com/watch?v=C5nvVqsjo9Q -->
</p>
</div>
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
* Price [USD]: 243 <br>
* Source: ebay <br>
* Country: USA <br>
* Machine condition: New <br>
* Maximum sheet thickness [mm]: 4.08 <br>
* Maximum round bar diameter [mm]: 11.11 <br>
* Maximum thickness of plate or angle [mm]: 4.08 <br>
* Cutting length [mm]: 127 <br>
* High hardness steel blade: Yes <br>
* To screw on a metal bench: Yes
</p>
</div>
</div>
<div class="row" style="width: 100%">
<div class="col-sm-12">
<p style="margin-bottom:0;">
[https://articulo.mercadolibre.com.ve/MLV-703546021-cizalla-cortadora-de-lamina-manual-somar-n4-tesoura-_JM Manual Sheet Cutter Somar N4 Tesoura]
</p>
</div>
</div>
<div class="row" style="width: 100%">
<div class="col-sm-6">
<p style="margin-top:0;">
[[File:oho_cm3_NYKOsfqPCC0.jpg|300px|link=https://articulo.mercadolibre.com.ve/MLV-703546021-cizalla-cortadora-de-lamina-manual-somar-n4-tesoura-_JM]]
<!-- https://www.youtube.com/watch?v=NYKOsfqPCC0 -->
</p>
</div>
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
* Price [USD]: 100 <br>
* Source: mercadolibre <br>
* Country: Venezuela <br>
* Machine condition: New <br>
* Maximum sheet thickness [mm]: 4 <br>
* Cutting length [mm]: 240 <br>
* High hardness steel blade: Yes <br>
* To screw on a metal bench: Yes
</p>
</div>
</div>
<div class="row" style="width: 100%">
<div class="col-sm-12">
<p style="margin-bottom:0;">
[https://articulo.mercadolibre.com.ve/MLV-709661898-5-inch-hoja-placa-metal-shear-construccion-tipo-montaje-_JM 5 Inch Sheet Metal Shear Plate Construction Type Mount]
</p>
</div>
</div>
<div class="row" style="width: 100%">
<div class="col-sm-6">
<p style="margin-top:0;">
[[File:oho_cm3_TLlFCBbGhaU.jpg|300px|link=https://articulo.mercadolibre.com.ve/MLV-709661898-5-inch-hoja-placa-metal-shear-construccion-tipo-montaje-_JM]]
<!-- https://www.youtube.com/watch?v=TLlFCBbGhaU -->
</p>
</div>
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
* Price [USD]: 363 <br>
* Source: mercadolibre <br>
* Country: Venezuela <br>
* Machine condition: New <br>
* Cutting length [mm]: 160 <br>
* High hardness steel blade: Yes <br>
* To screw on a metal bench: Yes
</p>
</div>
</div>
</li>
<li>
Requirements definition <br>
Definition of the main technical data (size, capacity, power...):
<ul>
<li>Maximum sheet thickness [mm]: 3</li>
<li>Maximum round bar diameter [mm]: 13</li>
<li>Maximum plate or angle thickness [mm]: 5</li>
<li>Cutting length [mm]: 150-180</li>
</ul>
</li>
<br>
<li>
Optimal functions and features: <br>
Definition of necessary/optional functions and features
<ul>
<li>High hardness steel blade: Shear is required to have hardened steel blades</li>
<li>To screw on a metal bench: It is preferred that the machine includes its own support structure</li>
</ul>
</li>
</ul>
<h4 style="margin-top:15px"><span class="mw-headline">Search & analisis DIY technologies</span></h4>
<hr>
<ul>
<li>
OHO Search engine
<div class="row" style="width: 100%">
<div class="col-sm-6">
<p style="margin-top:0;">
Customization of the OHO search engine <br>
A search for similar or related equipment was carried out in our repository, obtaining some equipment that can be used as a reference
</p>
</div>
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
[[File:oho_cm3_search1.jpg|300px|thumb|link=https://en.oho.wiki/wiki/Special:RunQuery/projectSearch?pfRunQueryFormName=projectSearch&ProjektSearch%5Bsearch%5D=shear&wpRunQuery=Search]]
</p>
</div>
</div>
</li>
<li>
Manual search <br>
Searches were also performed within Google, Youtube, special websites etc., getting, among others, the following results: <br><br>
<div class="row" style="width: 100%">
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
* Title: Homemade shears for sheet cutting <br>
* Views: 280000<br>
* Likes: 4900<br>
* Comments: 285 <br>
* Maximum sheet thickness [mm]: 3 <br>
* Maximum thickness of plate [mm]: 3  <br>
* Cutting length [mm]: 205 <br>
* High hardness steel blade: Yes  <br>
* To screw on a metal bench: Yes <br>
This example will be used as the main reference machine
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
<p style="margin-top:0;">
[[File:oho_cm3_3l5sapINxAM.jpg|300px|thumb|link=https://www.youtube.com/watch?v=3l5sapINxAM]]
</p>
</div>
</div>
<div class="row" style="width: 100%">
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
* Title: Leaf Spring HACK - Metal Cutter <br>
* Views: 486000<br>
* Likes: 5800<br>
* Comments: 162 <br>
* Maximum sheet thickness [mm]: 2.5 <br>
* Maximum thickness of plate [mm]: 2.5  <br>
* Cutting length [mm]: 200 <br>
* High hardness steel blade: Yes  <br>
* To screw on a metal bench: Yes
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
<p style="margin-top:0;">
[[File:oho_cm3_ZLxexHEj-yU.jpg|300px|thumb|link=https://www.youtube.com/watch?v=ZLxexHEj-yU]]
</p>
</div>
</div>
<div class="row" style="width: 100%">
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
* Title: Homemade metal shear <br>
* Views: 331000<br>
* Likes: 3200<br>
* Comments: 123 <br>
* Maximum sheet thickness [mm]: 3 <br>
* Maximum thickness of plate [mm]: 3  <br>
* Cutting length [mm]: 130 <br>
* High hardness steel blade: Yes  <br>
* To screw on a metal bench: Yes
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
<p style="margin-top:0;">
[[File:oho_cm3_YEqdlJHwmiE.jpg|300px|thumb|link=https://www.youtube.com/watch?v=YEqdlJHwmiE]]
</p>
</div>
</div>
<div class="row" style="width: 100%">
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
* Title: Manual Sheet Shear <br>
* Views: 236000<br>
* Likes: 4600<br>
* Comments: 215 <br>
* Maximum sheet thickness [mm]: 3.6 <br>
* Cutting length [mm]: 200 <br>
* High hardness steel blade: Yes  <br>
* To screw on a metal bench: Yes
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
<p style="margin-top:0;">
[[File:oho_cm3_QrTWE0wVggk.jpg|300px|thumb|link=https://www.youtube.com/watch?v=QrTWE0wVggk]]
</p>
</div>
</div>
</li>
<li>
Networking <br>
This section refers to contacting partners, associated organizations and experts <br>
Since the cases found on the internet provide enough information, it was not necessary to search for reference equipment in this way, it can be useful when working with unusual equipments
</li>
</ul>
<h4 style="margin-top:15px"><span class="mw-headline">Development & documentation</span></h4>
<hr>
<ul>
<li>
Analisis of functions & structures
<div class="row" style="width: 100%">
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
From analyzing the operation and parts of the [https://www.youtube.com/watch?v=3l5sapINxAM main reference machine] and the rest of the examples obtained, a first list of components for the shear is generated
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
<p style="margin-top:0;">
[[File:oho_cm3_dt1.jpg|300px|thumb]]
</p>
</div>
</div>
<div class="row" style="width: 100%">
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
During this process, some measurements of the parts and assemblies, essential for the design, are extracted
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
<p style="margin-top:0;">
[[File:oho_cm3_dt2.jpg|300px|thumb]]
</p>
</div>
</div>
</li>
<li>
Technical solutions
<div class="row" style="width: 100%">
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
The OHO development team also proceeds to design and determine the engineering problems that arise, in order to obtain a quality product that can be manufactured with Appropriate Technologies
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
<p style="margin-top:0;">
[[File:oho_cm3_dt3.jpg|300px|thumb]]
</p>
</div>
</div>
<div class="row" style="width: 100%">
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
One of the solutions generated by the technical team was the inclusion of some bushings in the joints, this to ensure that these joints do not get stuck and enough tightening to support the loads
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
<p style="margin-top:0;">
[[File:oho_cm3_dt5.jpg|300px|thumb]]
</p>
</div>
</div>
</li>
<li>
Repo for Technical documentation
<div class="row" style="width: 100%">
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
There is an internal and self-managed Gitlab repository, where the preparation of plans, exploded views, the final parts list, details and annotations, among others, are controlled at a formal and technical level
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
<p style="margin-top:0;">
[[File:oho_cm3_gitlab1.jpg|300px|thumb]]
</p>
</div>
</div>
</li>
<li>
Peer-Reviews
<div class="row" style="width: 100%">
<div class="col-sm-6" style="margin-top:0;">
<p style="margin-top:0;">
Before continuing with manufacturing, a group of experts was convened to verify the plans and generate observations, in order to optimize the design and prevent errors during later stages
</p>
</div>
<div class="col-sm-6" style="display:flex;align-items:flex-start; justify-content:flex-end;">
<p style="margin-top:0;">
[[File:oho_cm3_dt4.jpg|300px|thumb]]
</p>
</div>
</div>
</li>
</ul>
==== Manufacturing, tests and improvements ====
-----
<!-- * Workshop [[File:Review.png|20px|link=https://en.oho.wiki/index.php?title=Talk:Manual_shearing_machine_for_3mm_plate&action=edit&section=new&preloadtitle=Technical_development_5.1]] <br> Determination of the workshop for manufacturing: <br> Among the most important aspects to be fulfilled by the manufacturing workshop, we have: [[File:pdc_workshop3.jpg|300px|thumb]] -->
<!-- * Workshop [
{{fullurl:
{{TALKPAGENAME}}|action=edit&section=1&showtitle=1&preloadtitle=Technical_development|class=linksPopups}} Comments] <br> Determination of the workshop for manufacturing: <br> Among the most important aspects to be fulfilled by the manufacturing workshop, we have: [[File:pdc_workshop3.jpg|300px|thumb]] -->
<!-- * Workshop [[File:Review.png|20px|link=
{{fullurl:
{{TALKPAGENAME}}|action=edit&section=1&showtitle=1&preloadtitle=Technical_development-Workshop|class=linksPopups}}|Comments]] <br> Determination of the workshop for manufacturing: <br> Among the most important aspects to be fulfilled by the manufacturing workshop, we have: [[File:pdc_workshop3.jpg|300px|thumb]] -->
* Workshop <br> Determination of the workshop for manufacturing: <br> Among the most important aspects to be fulfilled by the manufacturing workshop, we have: [[File:pdc_workshop3.jpg|300px|thumb]]
** It does not require industrial or specialized processes such as plastic processing, CNC machining, complex chemical processes, among others
** It has basic tools for working with metal and wood at a non-industrial level
** It has measuring instruments appropriate to the processes, such as: vernier, tape measure, thread counter, gauges, etc.
** Includes painting equipment such as compressor and spray gun
** It is a space large enough and ordered for manufacturing, assembly and painting operations
** It has qualified personnel in basic and intermediate works with metal, wood, painting, among others
** Some parts or processes that are not available may be purchased or ordered from more specialized stores and workshops
* Purchase <br> Purchase of materials and components: <br> From the list of parts, the amounts of materials to be required from local suppliers were totaled [[File:oho_cm3_materials-list1.png|300px|thumb]]
** Structural profiles
** Fasteners
** Special profiles
** Metal plates
** Consumables
<div style="margin:130px"></div>
* Manufacturing of prototype <br> Fabrication according to specified quality standards: <br> The manufacturing process is oriented according to the order of the assemblies in the parts list and their assembly logic, this is shown in the various stages of the manufacturing video: [[File:oho_cm3_fab1.jpg|300px|thumb|link=https://www.youtube.com/watch?v=Oz5MzN0Pc_M]]
** [https://www.youtube.com/watch?v=Oz5MzN0Pc_M&t=6s Introduction]
** [https://www.youtube.com/watch?v=Oz5MzN0Pc_M&t=32s Cutting Blades]
** [https://www.youtube.com/watch?v=Oz5MzN0Pc_M&t=82s Support table]
** [https://www.youtube.com/watch?v=Oz5MzN0Pc_M&t=110s Equipment body]
** [https://www.youtube.com/watch?v=Oz5MzN0Pc_M&t=284s Painting and assembly]
<div style="margin:80px"></div>
* Tests and improvement <br> Module tests, system tests, improvement of components: <br> Some [https://www.youtube.com/watch?v=Oz5MzN0Pc_M&t=338s tests] were carried out on the equipment, to verify the correct adjustment of the parts and the efficiency in its operation. [[File:oho_cm3_wtest1.jpg|300px|thumb|link=https://www.youtube.com/watch?v=Oz5MzN0Pc_M&t=338s]]
** Lateral slack: Apply moderate force on the lever, from left to right and vice versa, alternately. The plates do not tilt
** Example of real use: Making cuts of the samples of plate and sheet
** Visual detail of the cut: Straight shape of the cut, Straight edge, no burrs
<div style="margin:110px"></div>
* Updates of technical documentation <br> Updates of plans, parts lists, assembly instructions:
** The main plates (2.1 to 2.3) were manufactured in a thickness of 12mm, which is sufficient, instead of the 16mm initially proposed
** Modification in the length of the bushings, according to the new plate thicknesses
** Pieces 2.5 and 2.6, manufactured in 1/2" square bar, available in the workshop
** Mobile blade (piece 2.7), with dimensions adjusted according to the leaf spring piece achieved, recovered material
:Plans are expected to be updated with these changes, in order to have accurate information regarding the equipment manufactured
==== Certification DIN Spec 3105 ====
-----
* Formal audit <br> Verification of the completeness of the documents: [[File:oho_cm3_gitlab2.jpg|300px|thumb]]
** Parts list
** Drawings of all parts and assemblies
** Assembly instructions
** Optional documents, technical notes
: In the image, it can be seen that this verification is complete, except for the previous corrections, which refer to the final update of the blueprints
<div style="margin:20px"></div>
* Assignment of reviewers <br> Search and assignment of peer-reviewers with sufficient expertise:
**[[User:Xtech2020_review|Xtech2020_review]]
** [[User:Thehunter|Thehunter]]
* Peer-reviews <br> Realization of the peer reviews, technical clarification, improvements: In process
* Certificate <br> Issue of the certificate: In process
<!-- ==== 7. Promotion, formation ====
-----
* PDF documentation <br> Creation of PDF documentation, training materials etc.:
* Video production <br> Production of blueprint videos, fabricaction videos etc.:
* Publishing <br> Publishing on own website, Wikipedia, social media:
* Use in projects  <br> Use in development cooperation projects, cooperation with partners:
-->
</div>
}}
}}
|Materials=
|Materials=
Line 66: Line 613:
|matquantity=1
|matquantity=1
|matdesc=3D views
|matdesc=3D views
|matparttype=
|matspec=
|matpdffile=oho_cm3_A1_Vistas 3D.pdf
|matpdffile=oho_cm3_A1_Vistas 3D.pdf
}}
}}
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|matquantity=1
|matquantity=1
|matdesc=Exloded 3D views
|matdesc=Exloded 3D views
|matparttype=
|matspec=
|matpdffile=oho_cm3_A2_Vistas de explosión 3d.pdf
|matpdffile=oho_cm3_A2_Vistas de explosión 3d.pdf
}}
}}
{{ProjektMaterials
{{ProjektMaterials
|matpartnumber=B
|matpartnumber=B
|matquantity=
|matdesc=Parts list
|matdesc=Parts list
|matparttype=
|matspec=
|matpdffile=oho_cm3_B_Parts list.pdf
|matpdffile=oho_cm3_B_Parts list.pdf
}}
}}
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|matquantity=1
|matquantity=1
|matdesc=Table structure
|matdesc=Table structure
|matparttype=
|matspec=
|matpdffile=oho_cm3_1.0_Estructura mesa.pdf
|matpdffile=oho_cm3_1.0_Estructura mesa.pdf
}}
}}
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|matquantity=1
|matquantity=1
|matdesc=Shear body
|matdesc=Shear body
|matparttype=
|matspec=
|matpdffile=oho_cm3_2.0_Cuerpo de cizalla.pdf
|matpdffile=oho_cm3_2.0_Cuerpo de cizalla.pdf
}}
}}
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|matparttype=standard
|matparttype=standard
|matspec=Hex bolt 1/2*2 1/4" NC
|matspec=Hex bolt 1/2*2 1/4" NC
|matpdffile=
}}
}}
{{ProjektMaterials
{{ProjektMaterials
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|matparttype=standard
|matparttype=standard
|matspec=Hexagonal screw 3/8*1 1/8" NC, optional l 1" hexagonal screw
|matspec=Hexagonal screw 3/8*1 1/8" NC, optional l 1" hexagonal screw
|matpdffile=
}}
}}
{{ProjektMaterials
{{ProjektMaterials
Line 244: Line 778:
|matparttype=standard
|matparttype=standard
|matspec=Hex nut 1/2" NC
|matspec=Hex nut 1/2" NC
|matpdffile=
}}
}}
{{ProjektMaterials
{{ProjektMaterials
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|matparttype=standard
|matparttype=standard
|matspec=Flat washer for 1/2" NC
|matspec=Flat washer for 1/2" NC
|matpdffile=
}}
}}
{{ProjektMaterials
{{ProjektMaterials
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|matparttype=standard
|matparttype=standard
|matspec=Flat washer for 3/8" NC
|matspec=Flat washer for 3/8" NC
|matpdffile=
}}
}}
{{ProjektMaterials
{{ProjektMaterials
Line 268: Line 799:
|matparttype=standard
|matparttype=standard
|matspec=Hex nut 3/8" NC
|matspec=Hex nut 3/8" NC
|matpdffile=
}}
}}
{{ProjektMaterials
{{ProjektMaterials
Line 282: Line 812:
|matquantity=1
|matquantity=1
|matdesc=Lever
|matdesc=Lever
|matparttype=
|matspec=
|matpdffile=oho_cm3_3.0_Palanca.pdf
|matpdffile=oho_cm3_3.0_Palanca.pdf
}}
}}
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|matparttype=standard
|matparttype=standard
|matspec=Hex bolt 1/2*2 1/2" NC
|matspec=Hex bolt 1/2*2 1/2" NC
|matpdffile=
}}
}}
{{ProjektMaterials
{{ProjektMaterials
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|matparttype=standard
|matparttype=standard
|matspec=Hex nut 1/2" NC
|matspec=Hex nut 1/2" NC
|matpdffile=
}}
}}
|certificate_requested=No
|certificate_requested=No
|certificate_status=in process
|reviewer1=Xtech2020 review
|reviewer2=Thehunter
}}
}}

Latest revision as of 00:10, 21 April 2023

Project data

Category: Shears

URL (first publication): https://www.youtube.com/watch?v=Oz5MzN0Pc_M

Keywords: cutting, shear, diy, metal, machine, workshop, open source, spring steel, hardening

License: CC BY-NC-SA 4.0

Organization: OHO

Project status: Active

Certification status: In process


Maturity of the project: prototype


Contains PDF-drawings: Yes

CAD files are editable: Yes

Assembly instructions are published: Yes

Bill of materials is published: Yes







no

yes yes 








  Oho cm3 foto1.jpgOho cm3 001.pngOho cm3 002.pngOho cm3oho cizalla-manual-fabricación 1.02.mp4 snapshot 05.37.jpgOho cm3oho cizalla-manual-fabricación 1.02.mp4 snapshot 06.03.jpgOho cm3 003.pngOho cm3 004.pngOho cm3 005.pngOho cm3 006.pngOho cm3 007.pngOho cm3 015.pngOho cm3 016.pngOho cm3 026.pngOho cm3 027.png

Project details

Description

Oho cm3oho cizalla-manual-fabricación 1.02.mp4 snapshot 05.37.jpg

The cutting shears boast a robust design made possible through thorough research of online videos and incorporation of repurposed car leaf springs that underwent a heat treatment. The end result is a durable yet environmentally conscious tool capable of handling challenging metal cutting tasks with ease.

Technical data

Below are some features of the manufactured shears:

  • Maximum sheet thickness: 3mm
  • Maximum round bar diameter: 13mm
  • Maximum plate or angle thickness: 5mm
  • Cutting length: 180mm
  • Dimensions: Length: 0.6m x Width: 0.6m x Height: 1m
  • Weight: Approximately 23 kg
  • Blade Type: Hardened 9260 steel
  • Drive: Manual lever

Technical documentation

PDF plans

Oho cm3 002.png

Files:

Oho cm3 cizalla-manual-para-plancha-3mm 0.96.pdf


CAD files

Oho cm3 render2.png

Files:

oho_cm3_STP-files.zip

oho_cm3_DWG-files.zip

oho_cm3_CAD-files2.zip

Assembly instructions

Here are some plans with the assembly sets and pieces, which can be detailed at this link

Zoom in

Oho cm3 003.png

Oho cm3 007.png

Oho cm3 016.png

Oho cm3 027.png

Zoom out

Oho cm3 003.png

Oho cm3 007.png

Oho cm3 016.png

Oho cm3 027.png

Project development

Based on the DIN 2221 standard, among others, OHO has established a series of stages in which the satisfactory completion of this project was carried out

Feasibility study

  • Materials, components

    Required materials & components can be sourced or replaced locally?
    ✓ Yes
    All the materials can be located with some ease, in hardware stores, parts stores and/or junkyards

    Previous theoretical case, showing the exploded view
  • Manufacturing processes

    Required manufacturing processes can be povided locally?
    ✓ Yes
    In a small workshop, all the processes required for manufacturing can be achieved

    Example showing the processes involved
  • Specific training

    Is specific training for manufacturing necessary and can be provided?
    ✓ Yes
    Especially when it comes to heat treatment for the blades

    Cutting blades
  • Sustainability

    Do all materials and processes meet the sustainability criteria?
    ✓ Yes
    It is observed that both the materials used and the manufacturing processes are sustainable from an economic, social and environmental point of view

    Sustainability concept

Market analisis and requirements

  • Market analysis
    Analysis of the current products on the market:

    Sealey 3s/6r metal hand shear cutter cropper 13mm round 6mm cutting

    Oho cm3 YEqdlJHwmiE.jpg

    * Price [USD]: 237
    * Source: ebay
    * Country: USA
    * Machine condition: New
    * Maximum sheet thickness [mm]: 6
    * Maximum round bar diameter [mm]: 13
    * Cutting length [mm]: 180
    * High hardness steel blade: Yes
    * To screw on a metal bench: Yes

    5" Length Sheet Metal Plate Cutting Bench Hand Shear Machine Toolsmillar

    Oho cm3 C5nvVqsjo9Q.jpg

    * Price [USD]: 243
    * Source: ebay
    * Country: USA
    * Machine condition: New
    * Maximum sheet thickness [mm]: 4.08
    * Maximum round bar diameter [mm]: 11.11
    * Maximum thickness of plate or angle [mm]: 4.08
    * Cutting length [mm]: 127
    * High hardness steel blade: Yes
    * To screw on a metal bench: Yes

    Manual Sheet Cutter Somar N4 Tesoura

    Oho cm3 NYKOsfqPCC0.jpg

    * Price [USD]: 100
    * Source: mercadolibre
    * Country: Venezuela
    * Machine condition: New
    * Maximum sheet thickness [mm]: 4
    * Cutting length [mm]: 240
    * High hardness steel blade: Yes
    * To screw on a metal bench: Yes

    5 Inch Sheet Metal Shear Plate Construction Type Mount

    Oho cm3 TLlFCBbGhaU.jpg

    * Price [USD]: 363
    * Source: mercadolibre
    * Country: Venezuela
    * Machine condition: New
    * Cutting length [mm]: 160
    * High hardness steel blade: Yes
    * To screw on a metal bench: Yes

  • Requirements definition
    Definition of the main technical data (size, capacity, power...):
    • Maximum sheet thickness [mm]: 3
    • Maximum round bar diameter [mm]: 13
    • Maximum plate or angle thickness [mm]: 5
    • Cutting length [mm]: 150-180

  • Optimal functions and features:
    Definition of necessary/optional functions and features
    • High hardness steel blade: Shear is required to have hardened steel blades
    • To screw on a metal bench: It is preferred that the machine includes its own support structure

Search & analisis DIY technologies

  • OHO Search engine

    Customization of the OHO search engine
    A search for similar or related equipment was carried out in our repository, obtaining some equipment that can be used as a reference

    Oho cm3 search1.jpg

  • Manual search
    Searches were also performed within Google, Youtube, special websites etc., getting, among others, the following results:

    * Title: Homemade shears for sheet cutting
    * Views: 280000
    * Likes: 4900
    * Comments: 285
    * Maximum sheet thickness [mm]: 3
    * Maximum thickness of plate [mm]: 3
    * Cutting length [mm]: 205
    * High hardness steel blade: Yes
    * To screw on a metal bench: Yes
    This example will be used as the main reference machine

    Oho cm3 3l5sapINxAM.jpg

    * Title: Leaf Spring HACK - Metal Cutter
    * Views: 486000
    * Likes: 5800
    * Comments: 162
    * Maximum sheet thickness [mm]: 2.5
    * Maximum thickness of plate [mm]: 2.5
    * Cutting length [mm]: 200
    * High hardness steel blade: Yes
    * To screw on a metal bench: Yes

    Oho cm3 ZLxexHEj-yU.jpg

    * Title: Homemade metal shear
    * Views: 331000
    * Likes: 3200
    * Comments: 123
    * Maximum sheet thickness [mm]: 3
    * Maximum thickness of plate [mm]: 3
    * Cutting length [mm]: 130
    * High hardness steel blade: Yes
    * To screw on a metal bench: Yes

    Oho cm3 YEqdlJHwmiE.jpg

    * Title: Manual Sheet Shear
    * Views: 236000
    * Likes: 4600
    * Comments: 215
    * Maximum sheet thickness [mm]: 3.6
    * Cutting length [mm]: 200
    * High hardness steel blade: Yes
    * To screw on a metal bench: Yes

    Oho cm3 QrTWE0wVggk.jpg

  • Networking
    This section refers to contacting partners, associated organizations and experts
    Since the cases found on the internet provide enough information, it was not necessary to search for reference equipment in this way, it can be useful when working with unusual equipments

Development & documentation

  • Analisis of functions & structures

    From analyzing the operation and parts of the main reference machine and the rest of the examples obtained, a first list of components for the shear is generated

    Oho cm3 dt1.jpg

    During this process, some measurements of the parts and assemblies, essential for the design, are extracted

    Oho cm3 dt2.jpg

  • Technical solutions

    The OHO development team also proceeds to design and determine the engineering problems that arise, in order to obtain a quality product that can be manufactured with Appropriate Technologies

    Oho cm3 dt3.jpg

    One of the solutions generated by the technical team was the inclusion of some bushings in the joints, this to ensure that these joints do not get stuck and enough tightening to support the loads

    Oho cm3 dt5.jpg

  • Repo for Technical documentation

    There is an internal and self-managed Gitlab repository, where the preparation of plans, exploded views, the final parts list, details and annotations, among others, are controlled at a formal and technical level

    Oho cm3 gitlab1.jpg

  • Peer-Reviews

    Before continuing with manufacturing, a group of experts was convened to verify the plans and generate observations, in order to optimize the design and prevent errors during later stages

    Oho cm3 dt4.jpg

Manufacturing, tests and improvements

  • Workshop
    Determination of the workshop for manufacturing:
    Among the most important aspects to be fulfilled by the manufacturing workshop, we have:
    Pdc workshop3.jpg
    • It does not require industrial or specialized processes such as plastic processing, CNC machining, complex chemical processes, among others
    • It has basic tools for working with metal and wood at a non-industrial level
    • It has measuring instruments appropriate to the processes, such as: vernier, tape measure, thread counter, gauges, etc.
    • Includes painting equipment such as compressor and spray gun
    • It is a space large enough and ordered for manufacturing, assembly and painting operations
    • It has qualified personnel in basic and intermediate works with metal, wood, painting, among others
    • Some parts or processes that are not available may be purchased or ordered from more specialized stores and workshops
  • Purchase
    Purchase of materials and components:
    From the list of parts, the amounts of materials to be required from local suppliers were totaled
    Oho cm3 materials-list1.png
    • Structural profiles
    • Fasteners
    • Special profiles
    • Metal plates
    • Consumables
  • Tests and improvement
    Module tests, system tests, improvement of components:
    Some tests were carried out on the equipment, to verify the correct adjustment of the parts and the efficiency in its operation.
    Oho cm3 wtest1.jpg
    • Lateral slack: Apply moderate force on the lever, from left to right and vice versa, alternately. The plates do not tilt
    • Example of real use: Making cuts of the samples of plate and sheet
    • Visual detail of the cut: Straight shape of the cut, Straight edge, no burrs
  • Updates of technical documentation
    Updates of plans, parts lists, assembly instructions:
    • The main plates (2.1 to 2.3) were manufactured in a thickness of 12mm, which is sufficient, instead of the 16mm initially proposed
    • Modification in the length of the bushings, according to the new plate thicknesses
    • Pieces 2.5 and 2.6, manufactured in 1/2" square bar, available in the workshop
    • Mobile blade (piece 2.7), with dimensions adjusted according to the leaf spring piece achieved, recovered material
Plans are expected to be updated with these changes, in order to have accurate information regarding the equipment manufactured

Certification DIN Spec 3105

  • Formal audit
    Verification of the completeness of the documents:
    Oho cm3 gitlab2.jpg
    • Parts list
    • Drawings of all parts and assemblies
    • Assembly instructions
    • Optional documents, technical notes
In the image, it can be seen that this verification is complete, except for the previous corrections, which refer to the final update of the blueprints
  • Assignment of reviewers
    Search and assignment of peer-reviewers with sufficient expertise:
  • Peer-reviews
    Realization of the peer reviews, technical clarification, improvements: In process
  • Certificate
    Issue of the certificate: In process


+ General Reviews General Reviews

Add Review

Reviews

Pos. Qty. Part Name Part code Part Type Specifications Review Status Show All Comments
A1 1 3D views

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A2 1 Exloded 3D views

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B Parts list

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1.0 1 Table structure

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1.1 2 Table angle Production Angle 1 1/2*1 1/2"*4mm, A36 steel

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1.2 2 Table side angle Production Angle 1 1/2*1 1/2"*4mm, A36 steel

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1.3 2 Table front angle Production Angle 1 1/2*1 1/2"*4mm, steel A36

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1.4 2 Table back leg angle Production Angle 1 1/2*1 1/2"*4mm, steel A36

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1.5 2 Table reinforcement angle Production Angle 1 1/2*1 1/2"*4mm, steel A36

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1.6 1 Angle2 table reinforcement Production Angle 1 1/2*1 1/2"*4mm, steel A36

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1.7 4 Anchor plate Production Plate 1 1/2*3/16", A36 steel

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2.0 1 Shear body

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2.1 1 Lower base plate Production Plate 16mm, steel A36

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2.2 1 Support center b Production Plate 16mm, steel A36

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2.3 1 Upper base plate Production Plate 16mm, steel A36

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2.4 2 Support plate Production Flat bar 1 1/2*3/16", steel A36

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2.5 1 Blade support1 Production Square bar 1/2", steel A36

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2.6 1 Blade support2 Production Square bar 1/2", steel A36

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2.7 1 Mobile blade Production Leaf spring 10mm, steel 9260, optional 13mm

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2.8 1 Fixed blade Production Leaf spring 10mm, steel 9260, optional 13mm

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2.9 2 Screw for pivot Standard Hex bolt 1/2*2 1/4" NC

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2.10 6 Fixed blade screw Standard Hexagonal screw 3/8*1 1/8" NC, optional l 1" hexagonal screw

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2.11 4 Pivot nut Standard Hex nut 1/2" NC

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2.12 2 Washer2 Standard Flat washer for 1/2" NC

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2.13 2 Washer Standard Flat washer for 3/8" NC

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2.14 4 Support nut Standard Hex nut 3/8" NC

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2.15 2 Support bushing Production Round bar 3/4", A36 steel

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3.0 1 Lever

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3.1 1 Lever arm Production Plate 12mm, A36 steel

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3.2 1 Lever bar Production Plate 3/16" or 3/4" round bar

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3.3 2 Lever arm Production Plate 12mm, A36 steel

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3.4 2 Lever bushing Production 3/4" round bar, A36 steel

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3.5 2 Union screw Standard Hex bolt 1/2*2 1/2" NC

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3.6 4 Rib nut Standard Hex nut 1/2" NC

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