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No.000108 Linear Movement Mechanism
33
33
Low speed stroke for a short distance.
Relevant category
Couplings
| Product name | Couplings - High Torque Disc, Clamping |
|---|---|
| Part number | MCKLCLK32-10-12 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Can tolerate large lateral / angular misalignments
Available sizes
■Couplings - High Torque Disc, Clamping
| Material | Surface Treatment | Accessory | Keywayed shaft bore | |
|---|---|---|---|---|
| Main Body | Disc | Main Body | ||
| Aluminum Diecast | Carbon Fiber | Electroless Nickel Plating | Hex Socket Head Cap Screw | None・One side・Both sides |
■Sizes and Dimensions
| O.D. | Shaft bore DIA. (Select drive/driven sides) | Overall Length | Clamp Screw | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| φ3 | φ4 | φ5 | φ6 | φ6.35 | φ7 | φ8 | φ9.53 | φ10 | φ11 | φ12 | φ14 | φ15 | φ16 | φ18 | φ20 | φ22 | φ24 | |||
| φ13 | ○ | ○ | ○ | 19 | M2 | |||||||||||||||
| φ16 | ○ | ○ | ○ | 23.2 | M2.5 | |||||||||||||||
| φ20 | ○ | ○ | ○ | ○ | ○ | ○ | 26 | |||||||||||||
| φ25 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | 30.2 | M3 | |||||||||||
| φ32 | ○ | ○ | ○ | ○ | ○ | ○ | 41 | M4 | ||||||||||||
| φ40 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | 47 | M5 | |||||||||
| φ50 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | 53 | M6 | |||||||||||
* Keywayed bore type is selectable for φ6 or larger
Accuracy Info
■Accuracy of coupling
| O.D. | Shaft Bore Tolerance | Allowable Angular Misalignment ( ) | Lateral Misalignment (mm) |
|---|---|---|---|
| φ13 | H8 | 2.5 | 0.2 |
| φ16 | |||
| φ20 | |||
| φ25 | |||
| φ32 | |||
| φ40 | 0.3 | ||
| φ50 |
Performance info.
■Load info. on coupling
| O.D. | Allowable Torque (N・m) | Max. Rotational Speed (r/min) | Moment of Inertia (kg・m²) |
|---|---|---|---|
| φ13 | 0.35 | 12000 | 8.0×10−8 |
| φ16 | 0.6 | 9000 | 2.4×10−7 |
| φ20 | 0.9 | 7600 | 7.2×10−7 |
| φ25 | 2.2 | 6000 | 2.2×10−6 |
| φ32 | 3.8 | 4800 | 6.0×10−6 |
| φ40 | 6.8 | 4000 | 1.7×10−5 |
| φ50 | 11.0 | 3500 | 4.6×10−5 |
Ball Roller Units
| Product name | Ball Roller Units - Hex Head, Stud / Press-Fit Type |
|---|---|
| Part number | BUHA400 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Can effectively move the workpiece freely in the XY direction
Available sizes
■Ball Roller Units - Hex Head, Stud / Press-Fit Type
| Material | Ball Roller | |||
|---|---|---|---|---|
| Ball Rollers | Frame | Load capacity per pc | ||
| Main Body / Spacer | Main Ball / Sub Ball | |||
| 304 Stainless Steel | 440C Stainless Steel(HRC55〜) | 6063 Aluminum Alloy(Clear Anodize) | BCHA24 | 343N |
■Ball Roller Units - Press Fit Type
| Overall Length | Number of Rollers | Roller Pitch | Overall Width | Overall Height |
|---|---|---|---|---|
| 200 | 4 | 50 | 40 | 32 |
| 400 | 8 | |||
| 600 | 12 |
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Application Overview
Purpose
- Purpose
- Jack for switching mold type.
- Operation
- By rotating the rotary actuator by 180 degrees, the lead screw is rotated converting rotary motion into linear motion.
Points for use
- A heavy load is slowly raised a short distance. A rotary actuator is used as the drive source.
Target workpiece
- Mold for lead frame
- Size: W180 x D310 x H214mm
- Weight: 34kg
Design Specifications
Operating Conditions or Design Requirements
- Ascending/descending stroke: 2.5mm
- Safety factor: S = 1.7
- Outer dimensions: W180 x D400 x H262mm
Required Performance
- Positioning accuracy: ±0.05mm
- Upward thrust: 580N
Selection Criteria for Main Components
- Lead Screw
- Since the ascending/descending stroke is 2.5mm, a 5-mm lead is selected as its multiple number lead.
- Rotary actuator
- A rotary actuator with an oscillation angle of 180° and a torque of 1.7N·m (0.5MPa) or higher is selected.
Design Evaluation
Verification of main components
- Whether an appropriate thrust for raising the workpiece can be obtained using the specified rotary actuator and the lead screw.
- Calculation of upward thrust
- Conditional value: workpiece mass W = 55kg, gravitational acceleration g = 9.8m/s², friction coefficient μ = 0.21, lead of lead screw R = 5mm, lead angle d = 4°40' = 4.67°, rotary actuator torque T = 1.863N·m= 186.3N·cm
Screw efficiency: η = (1 - μ x tan(d))/(1 + μ/tan(d))
=(1 - 0.21 x tan4.67°)/(1 + 0.21/tan4.67°)
=0.275
Upward thrust Ｆ = (2π x η x T)/R
= (2π x 0.275 x 186.3)/0.5
=644N
- Conditional value: workpiece mass W = 55kg, gravitational acceleration g = 9.8m/s², friction coefficient μ = 0.21, lead of lead screw R = 5mm, lead angle d = 4°40' = 4.67°, rotary actuator torque T = 1.863N·m= 186.3N·cm
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