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No.000015 Surface Inspection Fixture
46
46
Surface inspection fixture with toggle clamp for quick setup
Relevant category
Toggle Clamp
| Product name | Toggle Clamps -Horizontal Handle- |
|---|---|
| Part number | MC01-3 |
| Features | Hold Down, Flange Base Type. Low Profile-designed. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Improves workability with a single lever action
Available sizes
Toggle Clamps -Horizontal Handle-
| Main body material | 1018 Carbon Steel | 304 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Surface treatment | Trivalent chromate | - | |||||||
| Clamping force(N) | 264.6 | 264.6 | 400 | 882 | 2352 | 264.6 | 264.6 | 882 | 2352 |
| Weight(g) | 30 | 35 | 60 | 130 | 265 | 30 | 35 | 130 | 265 |
| Arm open/close angle | 90° | 90° | 90° | 85° | 90° | 90° | 90° | 85° | 90° |
| Handle open/close angle | 75° | 75° | 75° | 73° | 65° | 75° | 75° | 73° | 65° |
| Overall width | 23.8 | 23.8 | 23.8 | 36 | 35 | 23.8 | 23.8 | 36 | 35 |
| Overall height(Clampled) | 17.3 | 17.3 | 34.6 | 37.8 | 47.6 | 17.3 | 17.3 | 37.8 | 47.6 |
| Overall height(Unclamped) | 48.3 | 48.3 | 78 | 96.8 | 110.2 | 48.3 | 48.3 | 96.8 | 110.2 |
| Overall length (Clamped) | 71 | 69.1 | 100.6 | 143.5 | 173 | 71 | 69.1 | 143.5 | 173 |
| Clamp position | Fixed | Variable | Variable | Variable | Variable | Fixed | Variable | Variable | Variable |
| Accessory | Nylon Bolt | Bolt with rubber Material: NBR Hardness: Shore A70 | Stainless steel bolt | ||||||
* Please see the product pages for shape details and dimensions.
Round Wire Coil Springs
| Product name | Round Wire Springs -Spring Constant 0.5~1.0 N/mm- |
|---|---|
| Part number | WL14-65 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Used to raise the measurement section when the toggle clamp is released.
Available sizes
■Round Wire Springs -Spring Constant 0.5~1.0 N/mm-
| Deflection (Free length ratio) | Material | O.D. range | Free length range | |
|---|---|---|---|---|
| Spring Steel (ASTM A228) | 304 Stainless Steel | |||
| 75% | ○ | ○ | φ3～16 | 5～70 |
| 60% | ○ | ○ | φ3～27 | 5～90 |
| 45% | ○ | ○ | φ3～27 | 5～90 |
| 40% | ○ | ○ | φ2～27 | 5～100 |
| 40% | ○ | ○ | φ3～27 | 5～80 |
| 35% | ○ | ○ | φ3～27 | 5～100 |
| 30% | ○ | ○ | φ4～27 | 5～100 |
| 25% | ○ | ○ | φ3～27 | 5～100 |
■Sizes and Dimensions
| O.D. | Free length | Coil wire DIA. | Solid length | Max. deflection | Load(N) |
|---|---|---|---|---|---|
| φ12 | 10 | φ0.8 | 4.8 | 4 | 4 |
| 15 | φ0.9 | 7.2 | 6 | 5.9 | |
| 20 | φ0.9 | 7.2 | 8 | 7.8 | |
| 25 | φ0.9 | 7.2 | 10 | 9.8 | |
| 30 | φ1 | 10.5 | 12 | 11.8 | |
| 35 | φ1 | 10.5 | 14 | 13.7 | |
| 40 | φ1 | 10.5 | 16 | 15.7 | |
| 45 | φ1.1 | 15.4 | 18 | 17.7 | |
| 50 | φ1.1 | 15.4 | 20 | 19.6 | |
| 55 | φ1.1 | 15.4 | 22 | 21.6 | |
| 60 | φ1.2 | 22.8 | 24 | 23.5 | |
| 65 | φ1.2 | 22.8 | 26 | 25.5 | |
| 70 | φ1.2 | 22.8 | 28 | 27.5 | |
| 80 | φ1.3 | 34.5 | 32 | 31.4 | |
| φ13 | 10 | φ0.85 | 5.1 | 4 | 4 |
| 15 | φ0.9 | 6.3 | 6 | 5.9 | |
| 20 | φ1 | 8.7 | 8 | 7.8 | |
| 25 | φ1 | 8.7 | 10 | 9.8 | |
| 30 | φ1.1 | 13.2 | 12 | 11.8 | |
| 35 | φ1.1 | 13.2 | 14 | 13.7 | |
| 40 | φ1.1 | 13.2 | 16 | 15.7 | |
| 45 | φ1.1 | 13.2 | 18 | 17.7 | |
| 50 | φ1.1 | 13.2 | 20 | 19.6 | |
| 55 | φ1.1 | 13.2 | 22 | 21.6 | |
| 60 | φ1.1 | 13.2 | 24 | 23.5 | |
| 65 | φ1.2 | 18.6 | 26 | 25.5 | |
| 70 | φ1.2 | 18.6 | 28 | 27.5 | |
| 80 | φ1.4 | 37.8 | 32 | 31.4 | |
| 90 | φ1.4 | 37.8 | 36 | 35.3 | |
| φ14 | 15 | φ1 | 7.5 | 6 | 5.9 |
| 20 | φ1 | 7.5 | 8 | 7.8 | |
| 25 | φ1 | 7.5 | 10 | 9.8 | |
| 30 | φ1.1 | 11 | 12 | 11.8 | |
| 35 | φ1.1 | 11 | 14 | 13.7 | |
| 40 | φ1.1 | 11 | 16 | 15.7 | |
| 45 | φ1.2 | 15.6 | 18 | 17.7 | |
| 50 | φ1.2 | 15.6 | 20 | 19.6 | |
| 55 | φ1.2 | 15.6 | 22 | 21.6 | |
| 60 | φ1.2 | 15.6 | 24 | 23.5 | |
| 65 | φ1.3 | 22.1 | 26 | 25.5 | |
| 70 | φ1.3 | 22.1 | 28 | 27.5 | |
| 80 | φ1.3 | 22.1 | 32 | 31.4 | |
| 90 | φ1.5 | 43.5 | 36 | 35.3 | |
| φ16 | 15 | φ1.1 | 8.2 | 6 | 5.9 |
| 20 | φ1.1 | 8.2 | 8 | 7.8 | |
| 25 | φ1.2 | 10 | 10 | 9.8 | |
| 30 | φ1.2 | 10 | 12 | 11.8 | |
| 35 | φ1.2 | 10 | 14 | 13.7 | |
| 40 | φ1.2 | 10 | 16 | 15.7 | |
| 45 | φ1.4 | 21 | 18 | 17.7 | |
| 50 | φ1.4 | 21 | 20 | 19.6 | |
| 55 | φ1.4 | 21 | 22 | 21.6 | |
| 60 | φ1.4 | 21 | 24 | 23.5 | |
| 65 | φ1.5 | 29.7 | 26 | 25.5 | |
| 70 | φ1.5 | 29.7 | 28 | 27.5 | |
| 80 | φ1.5 | 29.7 | 32 | 31.4 | |
| 90 | φ1.6 | 40 | 36 | 35.3 | |
| φ18 | 20 | φ1.5 | 10 | 8 | 23.5 |
| 25 | φ1.6 | 12 | 10 | 29.4 | |
| 30 | φ1.6 | 12 | 12 | 35.3 | |
| 35 | φ1.7 | 16.2 | 14 | 41.2 | |
| 40 | φ1.7 | 16.2 | 16 | 47.1 | |
| 45 | φ1.8 | 19.8 | 18 | 53 | |
| 50 | φ1.8 | 19.8 | 20 | 58.8 | |
| 55 | φ1.8 | 19.8 | 22 | 64.7 | |
| 60 | φ1.8 | 19.8 | 24 | 70.6 | |
| 65 | φ2 | 32 | 26 | 76.5 | |
| 70 | φ2 | 32 | 28 | 82.4 | |
| 80 | φ2 | 32 | 32 | 94.1 | |
| 90 | φ2.2 | 43 | 36 | 105.9 | |
| 100 | φ2.2 | 43 | 40 | 117.7 |
＊Other sizes are available. Please see the product pages.
Performance info.
■Spring constant of round wire coil spring, O.D. referenced type (N/mm)
| O.D. | Max deflection (Free length) Type | |||||||
|---|---|---|---|---|---|---|---|---|
| 75% | 60% | 45% | 40% | 40% | 35% | 30% | 25% | |
| φ2 | - | - | - | 0.5 | - | - | - | - |
| φ3 | 0.1 | 0.3 | 0.5 | 1 | 1.5 | 2 | - | 3.9 |
| φ4 | 2.9 | 4.9 | ||||||
| φ5 | 2 | 2.9 | 5.9 | 9.8 | ||||
| φ6 | ||||||||
| φ8 | ||||||||
| φ10 | 0.2 | |||||||
| φ12 | ||||||||
| φ13 | 9.8 | 19.6 | ||||||
| φ14 | ||||||||
| φ16 | ||||||||
| φ18 | - | 0.5 | 1 | 2.9 | 3.9 | 4.9 | 14.7 | 29.4 |
| φ20 | - | - | ||||||
| φ22 | - | 29.4 | ||||||
| φ27 | - | |||||||
Technical calculations
■Coil spring load calculations
Load = Spring constant x Deflection
Height Adjust Pin
| Product name | Height Adjust Pins- Hex, B/F Standard |
|---|---|
| Part number | JPRA6-30.00 |
| Features | Can be used for height-adjusting. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Height accuracy is necessary for this application example.
Available sizes
■Height Adjust Pins- Hex, B/F Standard
| Material | Surface treatment | Hardness |
|---|---|---|
| 4137 Alloy Steel | − | Heat treated hardness 46~50HRC |
| Black oxide | Heat treated hardness 46~50HRC | |
| Hard chrome plating | Heat treated hardness 46~50HRC | |
| Plating thickness 3μm or more | Plating hardness 750HV~ | |
| 304 Stainless Steel | − | − |
| 440C Stainless Steel | − | Heat treated hardness 50~55HRC |
■Sizes and Dimensions
| Thread DIA. (Coarse) | Head height | Head Hex size | Under head thread length |
|---|---|---|---|
| (Configure in 0.01mm increments) | |||
| M3 | 2.00〜10.00 | 6 | 5 |
| M4 | 7 | 6 | |
| M5 | 8 | 8 | |
| M6 | 5.00〜30.00 | 10 | 8 |
| M8 | 13 | 10 | |
| M10 | 10.00〜50.00 | 17 | 12 |
| M12 | 19 | 15 |
Accuracy Info
■Accuracy of height adjust pins threaded type (Hex)
Head height tolerance: +0.01/0
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Application Overview
Purpose
- Fixture used to measure the surface roughness of workpieces.
Points for use
- Manual mechanism with toggle clamp operation.
- Because measurements are taken often, the workpiece is simply placed on the holder.
Target workpiece
- Stainless Steel material
Dims.: φ30 x H30
Weight: 170g
Design Specifications
Operating Conditions or Design Requirements
- Toggle clamp operation angle: 5.5°
- Spring deflection: 5mm
- External dims.: W100 x D250 x H174
Required Performance
- Pressure load: 0.6N/cm²
- Spring constant: 1N/mm
- This application uses 4 springs.
Selection Criteria for Main Components
- Toggle clamp
- Vertical type with high clamping force are used to retain spring reaction force.
Design Evaluation
Verification of main components
- Select a spring that can support the load weight.
- Spring load
- Calculation formula: Reaction force : F=kx
- Assumed load: F = 52N (Four springs)
- Set length: 57mm, Free length: 65mm
- Assumed deflection under pressure: x = 13mm (When set 8mm, When stroked 5mm),
- then k ＝ F / x / (4 pcs.) ＝ 52 / 13 / 4＝ 1 N/mm
- Spring constant: k =1N/mm is selected
Other Design Consideration
- Since the fixture is used often, the mechanism is designed for quick setup through the use of the toggle clamp.
- The toggle clamp is positioned to press on the mechanisms center of gravity.
- The spring load is 5x the retaining load to provide stability during the inspection process.
(Spring load of 52N against measurement instrument weight of 10N) - The work platform height is adjusted on the instrument side (10mm up/down)
- Since the full stroke of the toggle clamp is not used, the clamp contacts the upper plate. A piece of urethane is provided to protect the piece in contact with the clamp.
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