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- inCAD Library Home
- > No.000018 Test Fixture for Product Aging
No.000018 Test Fixture for Product Aging
50
50
Mechanism to convert rotary motion to reciprocating motion
Relevant category
Pivot Pin
| Product name | Precision Pivot Pins - Flanged, Hex Socket Head, Threaded with Lock Nut |
|---|---|
| Part number | SCLBR8-17-FC4-MC4 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
To support motor arm rotation.
Available sizes
Precision Pivot Pins - Flanged, Hex Socket Head, Threaded with Lock Nut
| Material | Hardness | Surface treatment | Included nut material | |
|---|---|---|---|---|
| Standard nut | U nut | |||
| 1045 Carbon Steel | − | Black oxide | SWRCH Carbon Steel | 1018 Carbon Steel |
| 40〜45HRC | ||||
| − | Electroless nickel plating | 304 Stainless Steel | 304 Stainless Steel | |
| 40〜45HRC | ||||
| Plating hardness 750HV~ | Hard chrome plating | SWRM Low Carbon Steel | 1018 Carbon Steel | |
| Plating thickness 3μm or more | ||||
| 304 Stainless Steel | − | − | 304 Stainless Steel | 304 Stainless Steel |
| 440C Stainless Steel | 45〜50HRC | |||
| 45〜50HRC | Hard chrome plating | |||
| Plating hardness 750HV~ | Plating thickness 3μm or more | |||
■Sizes and Dimensions
| Pin DIA. | Pin section length | Head O.D. | Head height | Threaded section length | Screw DIA. X Pitch |
|---|---|---|---|---|---|
| (Configure in 0.1mm increments) | |||||
| φ4 | 10.0〜 50.0 | φ7 | 5 | 6 | M 3×0.5 |
| φ5 | 10.0〜 60.0 | φ9 | M 4×0.7 | ||
| φ6 | 10.0〜100.0 | φ10 | 9 | M 5×0.8 | |
| φ8 | 10.0〜100.0 | φ13 | M 6×1.0 | ||
| φ10 | φ16 | 12 | M 8×1.25 | ||
| φ12 | 10.0〜200.0 | φ18 | 16 | M10×1.5 | |
| φ13 | 20.0〜200.0 | φ24 | 18 | M12×1.75 | |
| φ14 | |||||
| φ15 | |||||
| φ16 | 20.0〜200.0 | ||||
| φ17 | |||||
| φ18 | 24 | ||||
| φ20 | φ27 | M16×2.0 | |||
| φ22 | 20.0〜200.0 | ||||
| φ25 | φ30 |
Accuracy Info
Pivot pin, Flanged with Hex socket with a nut: Pin O.D. tolerance (g6)
| Pin diameter | Tolerance |
|---|---|
| φ4 | -0.004/-0.012 |
| φ5 | |
| φ6 | |
| φ8 | -0.005/-0.014 |
| φ10 | |
| φ12 | -0.006/-0.017 |
| φ13 | |
| φ14 | |
| φ15 | |
| φ16 | |
| φ17 | |
| φ18 | |
| φ20 | -0.007/-0.020 |
| φ22 | |
| φ25 |
Tension Spring
| Product name | Tension Springs -Heavy Load- |
|---|---|
| Part number | AWF12-60 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
To support applied load to workpiece.
Available sizes
Tension Springs -Heavy Load-
| Load class | Material | O.D. | Free length | End hooks | ||
|---|---|---|---|---|---|---|
| Spring Steel (ASTM A228) | 304 Stainless Steel | Range | Range | S hook | 90 deg. S hook | |
| Extra light load | ○ | ○ | φ2 - 12 | 10 - 100 | ○ | - |
| Light load | ○ | △ | φ2 - 20 | 10 - 175 | ○ | △ |
| Light-Med. load | ○ | △ | φ2 - 20 | 10 - 175 | ○ | △ |
| Med. load | ○ | △ | φ2 - 24 | 10 - 200 | ○ | △ |
| Med.-Heavy load | ○ | - | φ2 - 12 | 10 - 100 | ○ | - |
| Heavy load | ○ | △ | φ3 - 24 | 10 - 200 | ○ | △ |
Performance info.
Load info. on tension springs
| Load class | Ref. Load (N) | |
|---|---|---|
| Min. | Max. | |
| Extra light load | 0.69 | 19.6 |
| Light load | 1.86 | 78.45 |
| Light-Med. load | 2.45 | 98.07 |
| Med. load | 3.53 | 225.55 |
| Med.-Heavy load | 6.47 | 83.36 |
| Heavy load | 8.8 | 430.51 |
Technical calculations
Load info. on tension springs
P = Pi + (k x F)
- P: Load (N)
- Pi: Initial tension (N)
- k： Spring constant(N/mm)
- F: Deflection (mm)
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CAD Download (Unit Assembly)
CAD Download: File Format
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You will need to edit the Data so that it meets your specific design conditions. -
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* The part in the frame is a sub-assembly unit.
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It is configured so that each sub-assembly unit can be used as it is or edited.
Application Overview
Purpose
- Fixture to measure aging variations (dimensional changes over time, and cracking, etc.) by applying repeated loads. (Not to the extent of destruction)
Points for use
- Oscillating mechanism driven by a motor.
Target workpiece
- Levered lug
External Dims.: W40 x D30 x H3 (excluding the lever)
Workpiece weight: 5g
Design Specifications
Operating Conditions or Design Requirements
- Oscillates in ± 45° range.
- External dims.: W516 x D300 x H468
Required Performance
- Tensile load: 60N
Spring constant: 4.13N/mm
Selection Criteria for Main Components
- Motor
- A motor is selected for automated oscillating motion.
- Spring
- Spring selection makes applying arbitrary loadings possible.
Design Evaluation
Verification of main components
- Select an appropriate motor for oscillating motion.
- Motor speed
- Motor RPM (Ns): 1800rpm
- Reduction ratio (i): 1/50
- Rotation pitch circle diameter (Dp): 156mm
- Link ratio: Approx. 1/3
- Speed (V)
V=Ns×(1/60)× i ×π×Dp×1/3
=1800×(1/60)×(1/50)×π×156×1/3=98 mm/s
- Torque
- Motor torque Tm=3.33N·m
- Assumed load: F=60N
- Link ratio: Approx. 1/3
- Fa=F*1/3
- Load torque TL=(Fa×Dp)/(2×1000)=60×(1/3)×156/(2×1000)=1.56 N·m
Tm>TL, OK.
- Spring load
- Formula: Reaction force F=kx
- Assumed load: F=60N
- Deflection under tension: x=14.5mm
- Spring constant: k=60/14.5=4.13N/mm selected
Other Design Consideration
- The spring load can be varied by moving the spring post slot located on the plate. And adjusting bolt is used for adjustments, making it easy to change the spring to vary tension.
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