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- inCAD Library Home
- > No.000078 Soldering Fixture
No.000078 Soldering Fixture
14
14
Workpiece holding using magnets.
Relevant category
Magnet
| Product name | Magnets - Cylindrical |
|---|---|
| Part number | HXN10-2 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Handy and economical as an item to hold a workpiece
Available sizes
■Magnets (Round)
| Material | Surface Treatment | Heat Resistant Temperature |
|---|---|---|
| High Force Neodymium Magnet | Nickel Plating | 60℃ |
| Neodymium Magnet | 80℃ | |
| Heat-resistant Neodymium Magnets | 150℃ | |
| Cobalt Magnet | 200℃ |
■Sizes and Dimensions
| O.D.(mm) | Length(mm) |
|---|---|
| 8 | 2 |
| 3 | |
| 5 | |
| 6 | |
| 8 | |
| 10 | |
| 10 | 2 |
| 3 | |
| 5 | |
| 8 | |
| 10 | |
| 12 | 2 |
| 3 | |
| 5 | |
| 8 | |
| 10 |
Performance info.
■Speeds / Loads (Load Info.) of Magnets
| I.D. (mm) | Length(mm) | Attraction Force (N) | Surface Magnetic Flux Density Gauss (G) | ||||
|---|---|---|---|---|---|---|---|
| High Force Neodymium | Neodymium Heat-resistant Neodymium | Cobalt | High Force Neodymium | Neodymium Heat-resistant Neodymium | Cobalt | ||
| 8 | 2 | - | 6.66 | 4.41 | - | 2400－2600 | 2000－2200 |
| 3 | 14.01 | 10.78 | 7.45 | 3500－3800 | 3200－3400 | 2700－2900 | |
| 5 | 23.31 | 17.93 | 11.96 | 4700－5000 | 4200－4400 | 3500－3700 | |
| 6 | 26.76 | 20.59 | - | 5100－5400 | 4700－4900 | - | |
| 8 | 29.94 | 23.03 | 15.39 | 5400－5700 | 4600－4800 | 3900－4100 | |
| 10 | 31.23 | 24.02 | - | 5600－5900 | 5000－5200 | - | |
| 10 | 2 | - | 7.84 | 5.29 | - | 2000－2200 | 1700－1900 |
| 3 | 18.34 | 14.11 | 9.41 | 3100－3400 | 2800－3000 | 2400－2600 | |
| 5 | 32.23 | 24.79 | 16.56 | 4300－4600 | 3800－4000 | 3200－3400 | |
| 8 | - | 34.3 | 23.03 | - | 4700－4900 | 4000－4200 | |
| 10 | 49.43 | 38.02 | 25.48 | 5500－5800 | 4900－5100 | 4100－4300 | |
| 12 | 2 | - | 9.02 | 5.98 | - | 1600－1800 | 1300－1500 |
| 3 | - | 16.46 | 11.07 | - | 2500－2700 | 2100－2300 | |
| 5 | - | 31.16 | 20.87 | - | 3600－3800 | 3000－3200 | |
| 8 | - | 46.55 | 31.07 | - | 4500－4700 | 3800－4000 | |
| 10 | - | 52.72 | 35.28 | - | 4800－5000 | 4000－4200 | |
Small Hex Posts
| Product name | Small Hex Posts- One End Threaded, One End Tapped |
|---|---|
| Part number | SLCB5.5-20 |
| Features | Suitable for Limited Spaces or Space-Saving required Places. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Handy as the feet of the reversed fixture or as the handle to open a lid.
Available sizes
■Small Hex Posts (Both Ends Tapped)
| Material | Surface Treatment |
|---|---|
| 1018 Carbon Steel or SUM43 | Black Oxide |
| Electroless Nickel Plating | |
| 303 Stainless Steel | - |
■Sizes and Dimensions
| Type | Opposite Side Size (mm) | Length(1mm Increments) |
|---|---|---|
| 1018 Carbon Steel or SUM43 Black Oxide | 5.5 | 5－12 |
| 13－20 | ||
| 1018 Carbon Steel or SUM43 Electroless Nickel Plating | 5.5 | 5－12 |
| 13－20 | ||
| 303 Stainless Steel | 4 | 5－10 |
| 15、20 | ||
| 5 | 5－10 | |
| 15、20 | ||
| 5.5 | 5－12 | |
| 13－20 |
IDEA NOTE Best locating method for the cover with circular arc motion.
Cover is located with magnetic attraction and slotted holes/pins.
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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
- A fixture for soldering PC board.
Points for use
- Operating procedure
- The PC board is held down by the fixtures cover.
- User can perform soldering work on the first side of the PC board.
- After soldering the first side, lift up the cover, then remove and refit the PC board to its opposite side.
- Fold down the fixture cover again and begin soldering work on the 2nd side of the PC board.
Target workpiece
- PC board
- Dims.: W70 x D45 x t1 (Also compatible with PCB W40 x D80 x t1)
Design Specifications
Operating Conditions or Design Requirements
- External dims.: W120 x D120 x H30
- Magnet; 7.84N
Required accuracy · Load
- Cover retaining force: 5.9N
Selection Criteria for Main Components
- Magnet
- Magnetic hold down force should be sufficient to keep the PCB in place during soldering, and yet minimal enough for easy lifting of the cover when soldering is complete.
- As an example, select magnets with attraction force of approximately 5.9N.
Design Evaluation
Verification of main components
- Consider adding handle or hex posts for lifting of cover and overall handling of the fixture.
- When reversing, load applicable on the magnets: Cover + Hex posts + PCB = 45g + 10g + 5g ＝ 60g ＝ 0.59N
- Distance between the magnets and magnetic material: 2mm (Magnetic material: 4137 Alloy Steel, screw head)
- Assumed decay: 0.1
- Attraction to prevent cover opening: 0.59 / 0.1 = 5.9N
- Magnetic attraction can vary based on distance, temperature, material and size of magnetic body. Selection is to be made upon actual measurements.
Other Design Consideration
- Since soldering is applied on reversed sides, hex posts are provided as feet on the cover side. The posts are also used as handles for cover open/close.
- Locating pins are used to locate the cover.
- Add notches as needed to avoid wire harness, etc.
- The hex socket screw heads are used as attracted member since the main body and the cover are made of non-magnetically permeable material.
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