Manual shearing machine for 3mm plate

Manual shearing machine for 3mm plate Basic 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 Technical documentation 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

Description

Technical documentation

PDF plans
Files: Oho cm3 cizalla-manual-para-plancha-3mm 0.96.pdf

CAD files
Files: oho_cm3_STP-files.zip oho_cm3_DWG-files.zip oho_cm3_CAD-files2.zip

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 1. 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 2. Market analisis and requirements Market analysis Analysis of the current products on the market: Psealey 3s/6r metal hand shear cutter cropper 13mm round 6mm cutting * Price [USD]: 237 * Source: ebay * Country: USA 5" Length Sheet Metal Plate Cutting Bench Hand Shear Machine Toolsmillar * Price [USD]: 243 * Source: ebay * Country: USA Manual Sheet Cutter Somar N4 Tesoura * Price [USD]: 100 * Source: mercadolibre * Country: Venezuela 5 Inch Sheet Metal Shear Plate Construction Type Mount * Price [USD]: 363 * Source: mercadolibre * Country: Venezuela 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 3. 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 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 * 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 * 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 * 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 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 4. 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 During this process, some measurements of the parts and assemblies, essential for the design, are extracted 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 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 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 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 5. Manufacturing, tests, improvement Workshop Determination of the workshop for manufacturing: Among the most important aspects to be fulfilled by the manufacturing workshop, we have: 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: Manufacturing of prototype Fabrication according to specified quality standards: Tests and improvement Module tests, system tests, improvement of components: Updates of technical documentation Updates of plans, parts lists, assembly instructions:

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Parts list

Pos.	Qty.	Part Name	Part code	Part Type	Specifications	Review Status	Show All Comments
A1	1	3D views				Edit Edit All	PDF
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A2	1	Exloded 3D views				Edit Edit All	PDF
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B		Parts list				Edit Edit All	PDF
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1.0	1	Table structure				Edit Edit All	PDF
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1.1	2	Table angle		Production	Angle 1 1/2*1 1/2"*4mm, A36 steel	Edit Edit All	PDF
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1.2	2	Table side angle		Production	Angle 1 1/2*1 1/2"*4mm, A36 steel	Edit Edit All	PDF
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1.3	2	Table front angle		Production	Angle 1 1/2*1 1/2"*4mm, steel A36	Edit Edit All	PDF
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1.4	2	Table back leg angle		Production	Angle 1 1/2*1 1/2"*4mm, steel A36	Edit Edit All	PDF
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1.5	2	Table reinforcement angle		Production	Angle 1 1/2*1 1/2"*4mm, steel A36	Edit Edit All	PDF
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1.6	1	Angle2 table reinforcement		Production	Angle 1 1/2*1 1/2"*4mm, steel A36	Edit Edit All	PDF
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1.7	4	Anchor plate		Production	Plate 1 1/2*3/16", A36 steel	Edit Edit All	PDF
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2.0	1	Shear body				Edit Edit All	PDF
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2.1	1	Lower base plate		Production	Plate 16mm, steel A36	Edit Edit All	PDF
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2.2	1	Support center b		Production	Plate 16mm, steel A36	Edit Edit All	PDF
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2.3	1	Upper base plate		Production	Plate 16mm, steel A36	Edit Edit All	PDF
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2.4	2	Support plate		Production	Flat bar 1 1/2*3/16", steel A36	Edit Edit All	PDF
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2.5	1	Blade support1		Production	Square bar 1/2", steel A36	Edit Edit All	PDF
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2.6	1	Blade support2		Production	Square bar 1/2", steel A36	Edit Edit All	PDF
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2.7	1	Mobile blade		Production	Leaf spring 10mm, steel 9260, optional 13mm	Edit Edit All	PDF
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2.8	1	Fixed blade		Production	Leaf spring 10mm, steel 9260, optional 13mm	Edit Edit All	PDF
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2.9	2	Screw for pivot		Standard	Hex bolt 1/2*2 1/4" NC	Edit Edit All
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2.10	6	Fixed blade screw		Standard	Hexagonal screw 3/8*1 1/8" NC, optional l 1" hexagonal screw	Edit Edit All
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2.11	4	Pivot nut		Standard	Hex nut 1/2" NC	Edit Edit All
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2.12	2	Washer2		Standard	Flat washer for 1/2" NC	Edit Edit All
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2.13	2	Washer		Standard	Flat washer for 3/8" NC	Edit Edit All
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2.14	4	Support nut		Standard	Hex nut 3/8" NC	Edit Edit All
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2.15	2	Support bushing		Production	Round bar 3/4", A36 steel	Edit Edit All	PDF
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3.0	1	Lever				Edit Edit All	PDF
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3.1	1	Lever arm		Production	Plate 12mm, A36 steel	Edit Edit All	PDF
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3.2	1	Lever bar		Production	Plate 3/16" or 3/4" round bar	Edit Edit All	PDF
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3.3	2	Lever arm		Production	Plate 12mm, A36 steel	Edit Edit All	PDF
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3.4	2	Lever bushing		Production	3/4" round bar, A36 steel	Edit Edit All	PDF
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3.5	2	Union screw		Standard	Hex bolt 1/2*2 1/2" NC	Edit Edit All
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3.6	4	Rib nut		Standard	Hex nut 1/2" NC	Edit Edit All
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