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No.000209 Transfer and Press Mechanism
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Transfers and press-fits small parts.
Related 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 |
|---|---|---|
| EN 1.7220 Equiv. | 40-45HRC | Black Oxide |
| Electroless Nickel Plating | ||
| EN 1.4006 Equiv. | - |
■Sizes and Dimensions
| Screw Dia. (Coarse) | Screw Dia. (Fine) | Length in 5mm increments |
|---|---|---|
| M3 x 0.5 | - | 10-30 |
| M4 x 0.7 | M4 x 0.5 | 15-60 |
| M5 x 0.8 | M5 x 0.5 | 15-60 |
| M6 x 0.75 | M6 x 0.75 | 20-60 |
| M8 x 1.25 | M8 x 0.75 | 25-60 |
| M10 x 1.5 | M10 x 1.0 | 30-70 |
| M12 x 1.75 | M12 x 1.0 | 35-80 |
Fine U Nuts
| 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 |
| EN 1.0038 Equiv. | EN 1.4319 Equiv. |
| EN 1.1191 Equiv. Thermal Refined (22 - 28HRC) | |
| EN 1.4301 Equiv. | |
■Sizes and Dimensions
| Thread Dia. | Thread Dia. x Pitch | O.D. (mm) |
|---|---|---|
| M8 | M8 x 0.75 | 16 |
| M10 | M10 x 0.75 | 18 |
| M12 | M12 x 1.0 | 22 |
| M15 | M15 x 1.0 | 25 |
| M17 | M17 x 1.0 | 28 |
| M20 | M20 x 1.0 | 32 |
| M25 | M25 x 1.5 | 38 |
| M30 | M30 x 1.5 | 45 |
| M35 | M35 x 1.5 | 52 |
| M40 | M40 x 1.5 | 58 |
| M45 | M45 x 1.5 | 65 |
| M50 | M50 x 1.5 | 70 |
Accuracy Info
■Accuracy of Fine U Nuts
Perpendicularity of End Face (Max.): 0.05
Stop Pins
| 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 | ||
| EN 1.7220 Equiv. | 46-50HRC | 32-38HRC | Electroless Nickel Plating |
| EN 1.4125 Equiv. | 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 back to the suction part to pick up the next workpiece.
Target workpiece
- Workpiece: washer
Size: Ø20, 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 Ø20 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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