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No.000301 Width Change Mechanism
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Right and left movement synchronization using center of the workpiece as the reference
Related Category
Shaft Collar
| Product name | Shaft Collars/With Clamp Lever/Side Mounting Holes |
|---|---|
| Part number | SSCJKL12-M |
| Features | Integration with Clamp Lever eliminates Clamping Tools and realizes Speedup of Changeover |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Select a shaft collar with clamp lever to secure the position after setup
Available sizes
■Shaft Collars - With Clamp Lever, Side Mount
| Shaft Collar | Clamp Lever | Lever Thread | |||
|---|---|---|---|---|---|
| Material | Surface Treatment | Material | Surface Treatment | Material | Surface Treatment |
| EN 1.1191 Equiv. | Black Oxide | Zinc Diecast | Baked Paint | EN 1.0718 Equiv. | Black Chromate |
| EN 1.1191 Equiv. | Electroless Nickel Plating | ||||
| EN 1.4301 Equiv. | - | EN 1.4305 Equiv. | - | ||
■Sizes and Dimensions
| I.D. | Thickness | Shaft Collar O.D. |
|---|---|---|
| 6 | 18 | 35 |
| 8 | ||
| 10 | ||
| 12 | 40 | |
| 15 | 44 | |
| 16 | ||
| 20 | 48 | |
| 25 | 60 | |
| 30 | 70 |
Accuracy Info
■Accuracy of Shaft Collars
I.D. Tolerance: +0.05/+0.01
O.D. Tolerance: ±0.1
Thickness Tolerance: ±0.1
Side Perpendicularity Tolerance: 0.02
Handwheels
| Product name | Handwheels/Two Spoked/Stainless Steel |
|---|---|
| Part number | SHLN100-KC12 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Select the two spoked type with variation of stainless steel handwheel for setup
Available sizes
■Handwheels - Two Spoked, Stainless Steel
| Handle | Handle | Handle Thread | |||
|---|---|---|---|---|---|
| Material | Surface Treatment | Material | Surface Treatment | Material | Surface Treatment |
| EN 1.4581 Equiv. (EN 1.4401 Equiv.) | Shot Blasted | EN 1.4301 Equiv. | Electrolytic Polishing | EN 1.4301 Equiv. | Electrolytic Polishing |
| EN-JL 1030 Equiv. | Chrome Plating | EN 1.0038 Equiv. | Chrome Plating | EN 1.0038 Equiv. | Chrome Plating |
| EN AC-46200 Equiv. | Shot Blasted + Buffing | EN AW-2024 Equiv. | Shot Blasted | ||
■Sizes and Dimensions
| Knob O.D. | Height |
|---|---|
| 80 | 22 |
| 100 | 27 |
| 125 | 32 |
| 140 | 36 |
| 160 | 40 |
| 200 | 50 |
Scale Plates
| Product name | Scale Plates |
|---|---|
| Part number | MEPCH-LC230 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Select a scale plate to check the setup position visually
Available sizes
■Scale Plates
| Material | |
|---|---|
| Horizontal Scale Type | EN AW-1050 Equiv.(clear anodize) |
| EN 1.4301 Equiv. | |
| PET Plastic | |
| Vertical Scale Type | EN AW-1050 Equiv.(clear anodize) |
| PET Plastic |
■Sizes and Dimensions
| Width | Zero Point Position | Material | Length | |
|---|---|---|---|---|
| Horizontal Scale Type | 8 | Left End | EN AW-1050 Equiv. EN 1.4301 Equiv. | 100 200 |
| Right End | ||||
| Center | EN AW-1050 Equiv. EN 1.4301 Equiv. | 300 | ||
| 12 | Left End | EN AW-1050 Equiv. | 100 200 300 600 | |
| EN 1.4301 Equiv. | 100 200 | |||
| PET Plastic | 200 | |||
| Right End | EN AW-1050 Equiv. | 100 200 300 600 | ||
| EN 1.4301 Equiv. | 100 200 | |||
| PET Plastic | 200 | |||
| Center | EN AW-1050 Equiv.(clear anodize) | 300 | ||
| EN 1.4301 Equiv. | ||||
| PET Plastic | ||||
| Vertical Scale Type | 15 | Bottom | EN AW-1050 Equiv.(clear anodize) | 100 200 |
| Center | EN AW-1050 Equiv.(clear anodize) | 300 | ||
| PET Plastic |
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Application Overview
Purpose
- The sensor position is set up based on the size of the workpiece. (confirmation of the transferred workpiece width)
- Confirm the size of the workpiece based on values on the scale plate. (Example: Applicable to workpiece A when the scale is 10mm)
- Width of workpiece is changed equal from both sides (left and right) using center of the workpiece as the reference.
- The backlash is reduced using tensile springs.
Points for use
- A handle is used for adjustment, and rotation is stopped using a shaft collar.
- A retro-reflective type is used for the sensor.
Target workpiece
- Plastic BOX
- Outer shape of large workpiece: W220 x D150 x H120mm
- Outer shape of small workpiece: W50 x D150 x H120mm
Design Specifications
Operating Conditions or Design Requirements
- External Dimensions: W440 x D350 x H219mm
- One side preparation stroke: 85mm
Selection Criteria for Main Components
- Shaft collar
- Selected as "fixed" after an adjustment.
- Handle
- A handle which allows easy adjustment is selected.
- Tensile Springs
- Selected to reduce backlash.
- Rack Gear
- Two sections are selected to achieve synchronization.
Design Evaluation
Verification of main components
- The maximum distortion of a spring is verified based on the load conditions.
- Spring Load
- (i) When minimum width is set.
- Conditional Values: Initial tension 3.43N, Deflection when tensile is expected x = 0mm.
- Formula: Based on reaction force F = kx + Initial tension, F = 3.43N
(ii) When maximum width is set. - Formula: Reaction force F = kx + Initial tension
- Initial Tension: 3.43N
- Deflection when tension is expected: x = 85mm
- Maximum deflection (mm) x = Configurable S Dimension (= 75mm)/Standard S Dimension (= 50mm) x Standard maximum deflection (= 57mm) = 75/50 x 57 = 85.5 (mm) > 85mm
Established based on Deflection when tension is expected ≦ Maximum deflection. - Spring Constant k(N/mm) = 50 (Reference S Dimension) /Configurable S Dimension (= 75mm) x Standard Spring Constant (= 0.34N/mm) = 50/75 x 0.34 = 0.23(N/mm)
- Reaction force F = k(= 0.23 N/mm) x x(= 85.5mm) + Initial Tension (= 3.43N) = 0.23 x 85.5 + 3.43 = 23.1N
Other Design Consideration
- The sliding performance of the rack is improved during synchronization by placing oil-free bushings with high O.D. dimension accuracy in the slotted hole area.
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