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No.000074 Small PC Board Soldering Fixture
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Magnetic attraction is used to hold the harness
Relevant category
Guide Plungers
| Product name | Guide Plungers - With Hexagon Socket |
|---|---|
| Part number | GPL4 |
| Features | Clamps a workpiece from the side by spring force. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Side-push clamp unit
Available sizes
■Guide Plungers - With Hexagon Socket
| Main body | Pin | Spring | Knob | ||
|---|---|---|---|---|---|
| Material | Surface Treatment | Material | Surface Treatment | Material | Material |
| Aluminum Alloy | Clear Anodize | 1045 Carbon Steel | Electroless Nickel Plating | 304 Stainless Steel | Polyacetal |
■Sizes and Dimensions
| Load type | Screw Dia. M(Coarse) | Stroke (mm) |
|---|---|---|
| Light Load Heavy Load Ultra Heavy Load | 4 | 6 |
| 5 | 10 |
Performance info.
■Load Info.
| Load type | Spring Load (N) | |
|---|---|---|
| min | max | |
| Light Load | 0.6 | 2.5 |
| Heavy Load | 0.9 | 3.8 |
| Ultra Heavy Load | 1.4 | 5.9 |
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- * Unit assembly Data consists of some sub-assemblies.
It is configured so that each sub-assembly unit can be used as it is or edited.
Application Overview
Purpose
- Guide plunger retains the PC board. Magnets attract the lid to hold the harness for soldering.
Points for use
- Manual mechanism with a guide plunger retains the PC board.
Target workpiece
- PC board unit
Dims.: 10 x 20 x 1.2, Harness DIA. φ2.7
Design Specifications
Operating Conditions or Design Requirements
- External dims: W110 x D70 x H34
- Guide plunger stroke: 6mm
- Harness holder rotation: 90°
- Harness holder is retained by magnets.
Required Performance
- Workpiece retention force: 1.24N
- Harness clamp force: 7.8N
Selection Criteria for Main Components
- Guide plunger
- In order to obtain clamping force that does not damage workpieces, plunger for light loads is selected.
- Magnet
- Select magnets that can hold the harness and be adjusted manually.
Design Evaluation
Verification of main components
- Verify if the guide plunger can retain the workpiece.
- Spring load
- Formula: Reaction force: F 1 =kx 1 +S
- Initial load: S = 0.6N
- Assumed deflection during pressurization: x 1 =2mm
- Spring constant: k = F 2 /x 2 =1.9/6=0.32 N/mm
When (Stroke (x 2 )6mm,(Max - Min load) = F2 = 2.5 - 0.6 = 1.9
=2.5-0.6=1.9Load increase of N: From catalog) - Assumed applied load on workpiece: F 1 =kx 1 +S=0.32×2+0.6=1.24 N
Other Design Consideration
- A guide plunger with clamp from the side is selected since the top surface of the PC board is the working surface.
- The harness is held with a hinge to keep the assembly simple and easy to adjust.
- The harness holder is made of stainless steel 403 to ensure it is magnetic.
- The clamp block tip has a 5° angle to push the piece diagonally down.
- The magnets are held with set screws.(Can also be glued)
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