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- > No.000209 Transfer and Press Mechanism
No.000209 Transfer and Press Mechanism
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Transfers and press-fits small parts.
Relevant category
Stopper Bolts
| Product name | Stopper Bolts- Hexagon Socket, Fine Thread |
|---|---|
| Part number | STRC4-25 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Suitable for economical positioning/securing components
Available sizes
■Stopper Bolts- Hexagon Socket, Fine Thread
| Material | Hardness | Surface Treatment |
|---|---|---|
| 4137 Alloy Steel | 40-45HRC | Black Oxide |
| Electroless Nickel Plating | ||
| 410 Stainless Steel | − |
■Sizes and Dimensions
| Screw Dia. (Coarse) | Screw Dia. (Fine) | Length in 5mm increments |
|---|---|---|
| M3x0.5 | ― | 10－30 |
| M4x0.7 | M4x0.5 | 15－60 |
| M5x0.8 | M5x0.5 | 15－60 |
| M6x0.75 | M6x0.75 | 20－60 |
| M8x1.25 | M8x0.75 | 25－60 |
| M10x1.5 | M10x1.0 | 30－70 |
| M12x1.75 | M12x1.0 | 35－80 |
Fine U Nut
| Product name | Fine U Nuts |
|---|---|
| Part number | FUNT30 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Determines the thrust direction position for bearings.
Available sizes
■Fine U Nuts
| Material | |
|---|---|
| Main Body | Friction Ring |
| 1018 Carbon Steel | 301 Stainless Steel |
| 1045 Carbon Steel Thermal Refined (22 - 28HRC) | |
| 304 Stainless Steel | |
■Sizes and Dimensions
| Thread Dia. | Thread Dia. x Pitch | O.D. (mm) |
|---|---|---|
| M8 | M8x0.75 | 16 |
| M10 | M10x0.75 | 18 |
| M12 | M12x1.0 | 22 |
| M15 | M15x1.0 | 25 |
| M17 | M17x1.0 | 28 |
| M20 | M20x1.0 | 32 |
| M25 | M25x1.5 | 38 |
| M30 | M30x1.5 | 45 |
| M35 | M35x1.5 | 52 |
| M40 | M40x1.5 | 58 |
| M45 | M45x1.5 | 65 |
| M50 | M50x1.5 | 70 |
Accuracy Info
■Accuracy of Fine U Nuts
Perpendicularity of End Face (Max.): 0.05
Stop Pin
| Product name | Stop Pins- Screw Type, T Standard |
|---|---|
| Part number | STEHN7 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Suitable as a stopper pin
Available sizes
■Stop Pins- Screw Type, T Standard
| Material | Hardness | Surface Treatment | |
|---|---|---|---|
| Head Height Fixed | Head Height Configurable | ||
| 4137 Alloy Steel | 46-50HRC | 32-38HRC | Electroless Nickel Plating |
| 440C Stainless Steel | 50-55HRC | 40-45HRC | - |
■Sizes and Dimensions
| Opposite Side (mm) | Thickness (mm) | |
|---|---|---|
| Fixed | 0.5mm increments | |
| 5.5A | 3 | 5.0～30.0 |
| 5.5 | 5 | |
| 7 | ||
| 8 | ||
| 10 | 5.0～30.0 | |
| 10B | 8 | |
| 13 | 5 | |
| 13A | 8 | |
| 13B | ||
| 14 | 5 | |
| 14A | 8 | |
| 14B | ||
| 17 | 5 | 5.0～30.0 |
| 17A | 8 | |
| 17B | ||
| 19 | 5 | |
| 19A | 8 | |
| 19B | ||
Accuracy Info
■Accuracy of Stop Pin
Thickness Tolerance (mm): +0.01
0
IDEA NOTE Workpiece separation
To prevent thin workpieces from overlapping, a separation plate is installed in the middle of the transfer path to the press-fitting part.
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Application Overview
Purpose
- Purpose: To transfer and press-fit washers.
Operation: A washer is suctioned by vacuum, rotated by 180°, transferred to the press fitting part, and press-fit onto the shaft by the cylinder. The head rotates by -180° to return to the suction part to pick up the next workpiece.
Target workpiece
- Workpiece: washer
Size: φ20, t0.5
Design Specifications
Operating Conditions or Design Requirements
- Outer dimensions: W230 x D263 x H598mm
Rotating angle:±180°
Press fit stroke:8mm
Suction head positioning time(when rotated by 180°)1Sec
Required Performance
- Press fitting force: 40N or higher
Selection Criteria for Main Components
- As the press fitting force is 40N or higher, a φ20 cylinder is selected.
To achieve 180° rotation time of 1 second, a 100W motor is selected.
Design Evaluation
Verification of main components
- Verify if the motor selected can satisfy the load inertia and load torque requirements.
- Calculation of shaft-converted load inertia
- Conditional value: inertia of reducer JMG = 0.051kg·cm², inertia of shaft JS = 4.705kg·m², inertia of coupling JC = 6.300kg·cm², inertia of rotary table JK = 198.4kg·cm², reduction ratio 1/nm = 1/21.
- From shaft-converted load inertia JL = JMG + (JC + JK + JS) x (1/nm)², JL = 0.051 + (6.3 + 198.375 + 4.705) x (1/21)² = 0.526kg·cm².
From inertia ratio m = JL/JM, m = 0.526/0.078 = 6.8 < 17 times (motor specification recommended value).
- Calculation of torque during acceleration
- Conditional value: efficiency of drive section η = 0.980, motor rotation speed N0 = 832.233r/min, acceleration time Tsa = 0.200s, motor shaft-converted load torque TL = 0.000N·m.
- From torque during ascending acceleration TMa = ((((JL/η) + JM) x N0) / (9.55 x 104 x Tsa)) + TL, TMa = ((((0.526 / 0.987) + 0.078) x 832.233) / (9.55 x 104 x 0.2)) + 0.000 = 0.027N·m.
- The maximum torque is reached during acceleration, and as peak load rate Rp is obtained by Rp = (Tma / Ttyp) x 100, where rated torque Ttyp = 0.32N·m,
Rp = (0.027/0.32) x 100 = 8.438% - If the actual load torque is calculated by calculating the torque during each operation pattern, 0.014N·m < 0.32N·m (rated torque).
Other Design Consideration
- As the index table for feeding workpieces is arranged at a lower position, the mounting bracket for the motor is placed at the top of the mechanism.
In addition, a servo motor is employed to address high speed requirements and the acceleration/deceleration.
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