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No.000123 Multiple Lead Forming Jig
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Workpiece retention and forming by two toggle clamps.
Related Category
Toggle clamps
| Product name | PushPull |
|---|---|
| Part number | MC07-3 |
| Features | Suitable when clamping a workpiece from the side. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Clamping force at the end of the stroke is suitable for the application.
Available sizes
■Toggle Clamps -Push-Pull-
| Material | EN 1.0038 Equiv. |
|---|---|
| Surface Treatment | Main Body: Trivalent Chromate / Shaft: Nickel Plating |
| Stroke (mm) | 30 |
| Tightening Force (N) | 1960 |
| Weight (g) | 370 |
| Open-Close Angle of Handle | 140° |
| Overall Width | 50 |
| Overall Height (Clamped) | 99.5 |
| Tip Bolt | Steel Bolt |
| Overall Length (Clamped) | 158.5 |
| Overall Length (Unclamped) | 265 |
| Push Shaft Height | 20 |
* Please see the product pages for shape details and dimensions.
Adjustment Pads
| Product name | Adjustment Pads/Nonslip Type |
|---|---|
| Part number | FJGMS10-75-R |
| Features | The rubber material on pads securely grips on the floor surface. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Select the non-slip type to prevent slipping during operation.
Risk info.
Insufficient for anti-slip effect.
Available sizes
■Adjustment Pads - Nonslip Type
| Main Body | Rubber | |||
|---|---|---|---|---|
| Material | Surface Treatment | Material(Color) | Hardness | |
| Steel Type | EN 1.0038 Equiv. | Trivalent Chromate | Elastomer (Black) | - |
| Neoprene Rubber (Black) | Shore A70 | |||
| Non-Migration Chloroprene Rubber (Gray) | ||||
| Electrically Conductive Rubber (Black) | ||||
| PVC (Dark Blue) | ||||
| Stainless Steel | EN 1.4301 Equiv. | Electrolytic Polishing | Elastomer (Black) | - |
| Neoprene Rubber (Black) | Shore A70 | |||
| Non-Migration Chloroprene Rubber (Gray) | ||||
| Electrically Conductive Rubber (Black) | ||||
■Sizes and Dimensions.
| Thread DIA. | Thread Length (mm). |
|---|---|
| 8 | 50, 100 |
| 10 | 75, 100 |
| 12 | 75, 100, 125, 150 |
| 16 | 75, 100, 130, 150, 180 |
| 20 | 100, 130, 150, 180 |
Performance info
■Speeds / Loads (Load Info.) of Adjustment Pads
| Thread DIA. | Thread Length (mm) | Allowable Vertical Load (kN) |
|---|---|---|
| 8 | 50 | 3.9 |
| 100 | ||
| 10 | 75 | 4.3 |
| 100 | ||
| 12 | 75 | 4.9 |
| 100 | ||
| 125 | ||
| 150 |
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Application Overview
Purpose
- Jig to clamp and form multiple workpieces at the same time.
Points for use
- Manual mechanism by toggle clamp operations.
- Cover for the workpiece is designed to be removed without using tools.
Target workpiece
- Electronic part.
- Outer dimensions: W9.5 x D6 x H35.
Design Specifications
Operating Conditions or Design Requirements
- Outer dimensions: W276 x D231 x H144.
- Toggle clamp stroke:
Workpiece clamp side: 40mm.
Forming side: 30mm.
Required Performance
- Assumed forming load: 200N.
Selection Criteria for Main Components
- Toggle clamp.
- As the toggles make horizontal movements, a side push type is selected.
- For the toggle clamp for the workpiece clamp, a push-pull type is selected because the clamp handle needs to be in horizontal position during clamping.
- Leveling mount.
- Non-slip type leveling mounts are selected to prevent the jig from slipping during work.
Design Evaluation
Verification of main components
- Verify that selected toggle clamp tightening force is appropriate for lead forming.
- Toggle clamp for forming.
- Assumed forming load: 200N.
(This is an estimated value because the load changes depending on the lead wire diameter, bending position, material, etc.) - Toggle clamp tightening force: 1960N.
- Safety factor: 1960/200 = 9.8times.
(As the load is an estimated value, a large safety factor should be taken into consideration.).
- Assumed forming load: 200N.
Other Design Consideration
- Multiple workpieces are clamped altogether by one clamp and formed by the other clamp.
- To clarify the order of toggle clamp operations, the operation numbers are indicated by stickers attached to the clamps.
- The shape of the workpiece escape in the base block is made smaller to eliminate unacceptable workpieces (bent workpieces).
- The vertical clearance for the lead forming part should be equal to or above the lead wire diameter in size and made as narrow as possible (in consideration of the upper and lower limits of tolerance).
- To prevent the jig from shifting during workpiece retention and forming, leveling mounts with rubber are used.
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