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No.000021 Soldering Station
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Fixture used to aid the soldering process.
Relevant category
Flat Spring
| Product name | Flat Springs |
|---|---|
| Part number | IBNWB-T0.4-H8-F10-E10-G10-Q25-R60-A3-X4 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Can apply load to affix PC Board.
Available sizes
■Flat Springs
| Hole machined type | Width [H] | Thickness [T] | Length (Configure in 1mm increments) | Bend angle (5° increment) | Hole machined type B,C,D | Hole machined type C,D | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 1 [Q] | 2 [R] | Hole DIa. [A] | Hole location 1 [X] | Hole location 2 [P] | |||||||||
| 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | [F] | [E] | [G] | (Configure in 0.5mm increment) | ||||||
| A No hole machining ・ B ・ C ・ D | 6 | ○ | ○ | ○ | ○ | 10〜50 | 10〜50 | 10〜50 | 5〜90 | 5〜90 | φ2・φ2.5 ・φ3・φ3.5 ・φ4.5・φ5.5 ・φ6.5・φ9 | A/2＋2≦X、 X≦F−A−(P) | A＋1.5≦P | |||
| 8 | ○ | ○ | ○ | ○ | ||||||||||||
| 10 | ○ | ○ | ○ | ○ | ||||||||||||
| 12 | ○ | ○ | ○ | ○ | ||||||||||||
| 15 | ○ | ○ | ○ | ○ | ||||||||||||
| 18 | ○ | ○ | ○ | ○ | ||||||||||||
| 21 | ○ | ○ | ○ | ○ | ||||||||||||
| 25 | ○ | ○ | ○ | ○ | ||||||||||||
＊Please see the product pages for details on possible machined sizes.
Technical calculations
■Spring constant of flat spring
Simplified force calculation method (Reference)
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Application Overview
Purpose
- A fixture that secures PC boards for soldering.
Points for use
- PC boards are secured at 2 corners with flat springs. This provides the user with unobstructed access to the center of the PC board.
Target workpiece
- PC board
Dims.: 50 x 40 x 2
Design Specifications
Operating Conditions or Design Requirements
- Flat spring deflection: 0.57mm
- External dims.: W220 x D60 x H25
Required Performance
- Workpiece retention load: 4.1N
Selection Criteria for Main Components
- Flat spring
- Double bent type flat springs are used to secure PC boards.
Design Evaluation
Verification of main components
- Select suitable springs to hold the PC boards.
- Spring load
- Spring constant k = Ebh³ / 4L³
- = 186000 × 8 × 0.4³ / (4 × 14.9³) = 7.2 N/mm
- Flat spring deflection: 0.57mm
- Calculation formula: Reaction force: F = kx
- Assumed workpiece retention load: F = 7.2 x 0.57 = 4.1N
Other Design Consideration
- Since this is a soldering application, the base is made of heat resistant glass-epoxy.
- Threaded inserts are used on the tapped holes in the glass-epoxy base.
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