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- > No.000161 Workpiece Separation/Feed Mechanism
No.000161 Workpiece Separation/Feed Mechanism
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Separation and unloading of circular workpieces with a single pneumatic cylinder
Relevant category
Hinge Bases Center Fulcrum 4 Mounting Points
| Product name | Hinge Bases - Center Fulcrum |
|---|---|
| Part number | HGCNB8-W8-H25 |
| Features | Center fulcrum type hinge base that can be used as cylinder clevis mounts. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Cost Effective
Available sizes
■Hinge Bases (Selectable Sizes)
| Type | Material | Surface Treatment |
|---|---|---|
| T-Shaped | 1045 Carbon Steel | Black Oxide |
| Electroless Nickel Plating | ||
| 304 Stainless Steel | - |
■Sizes and Dimensions
| Hinged | ||
|---|---|---|
| Diameter | Width 1 mm Increment | Height 5mm Increments |
| φ3 | 3-6 | 15-25 |
| φ4 | 4-8 | 20-30 |
| φ5 | 5-10 | |
| φ6 | 6-12 | 25-35 |
| φ8 | 8-16 | |
| φ10 | 10-18 | 30-40 |
| φ12 | 12-30 | |
| φ13 | 13-30 | |
| φ14 | 14-24 | 35-45 |
| φ15 | 15-24 | |
| φ16 | 16-24 | |
| φ20 | 20-30 | 40-50 |
| φ25 | 25-35 | |
Stepped Screws
| Product name | Stepped Bolts - Extra Low Head |
|---|---|
| Part number | DBTS5-8-5-PC |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Suitable for a design that requires double stepped end machining
Available sizes
■Stepped Screws (Selectable Sizes)
| Type | Material | Surface Treatment | |||
|---|---|---|---|---|---|
| Extra Low Head | Low Head | Button Head Cap Screw | Phillips | ||
| ○ | ○ | ○ | ○ | 1045 Carbon Steel | Black Oxide |
| ○ | ○ | ○ | ○ | 1045 Carbon Steel | Electroless Nickel Plating |
| ○ | ○ | ○ | ○ | 303 Stainless Steel | - |
■Sizes and Dimensions
| Type | Screw Dia. | Thread Length | Stepped Dia. | Stepped Length |
|---|---|---|---|---|
| Extra Low Head | M3 | 3-6 | φ5 | 5-20 |
| M4 | 4-8 | φ6 | ||
| M5 | 5-10 | φ8 | ||
| M6 | 6-12 | φ10 | ||
| M8 | 8-12 | φ12 | ||
| M10 | 10-15 | φ15 | ||
| Low Head | M3 | 3-6 | φ5 | 3-20 |
| M4 | 4-8 | φ6 | ||
| M5 | 5-10 | φ8 | ||
| M6 | 6-12 | φ10 | ||
| M8 | 8-12 | φ12 | ||
| M10 | 10-15 | φ15 | ||
| Button Head Cap Screw | M3 | 3-6 | φ5 | 5-20 |
| M4 | 4-8 | φ6 | ||
| M5 | 5-10 | φ8 | ||
| M6 | 6-12 | φ10 | ||
| M8 | 8-12 | φ12 | ||
| M10 | 10-15 | φ15 | ||
| Phillips | M3 | 3-6 | φ5 | 1-20 |
| M4 | 4-8 | φ6 | ||
| M5 | 5-10 | φ8 | ||
| M6 | 6-12 | φ10 | ||
| M8 | 8-12 | φ12 | ||
| M10 | 10-15 | φ15 |
Rod End Bearings
| Product name | Rod End Bearings - Standard |
|---|---|
| Part number | PHSCM8 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Suitable for the configuration of changing the cylinder movement to swinging
Available sizes
■Rod End Bearings (Standard)
| Type | Material | ||
|---|---|---|---|
| Holder | Spherical Inner Ring | Bushing (Liner) | |
| Steel | 1035 Carbon Steel ( Trivalent Chromate) | 52100 Bearing Steel(58HRC-) | Special Copper Alloy |
| Oil-Free | 1035 Carbon Steel (Trivalent Chromate) | 52100 Bearing Steel(58HRC-) | Self-lubricating Synthetic Resin |
| 1035 Carbon Steel (Trivalent Chromate) | 52100 Bearing Steel(58HRC-) | Polytetrafluoroethylene Resin | |
| Stainless Steel Oil Free | 303 Stainless Steel | 440C Stainless Steel(58HRC-) | Polytetrafluoroethylene Resin |
■Sizes and Dimensions
| Bearing I.D. | Ball Center - Holder Edge |
|---|---|
| 3 | 12 |
| 4 | 14 |
| 5 | 16 |
| 6 | 18 |
| 8 | 22 |
| 10 | 26 |
| 12 | 30 |
| 14 | 34 |
| 16 | 38 |
| 18 | 42 |
| 20 | 46 |
| 22 | 50 |
Accuracy Info
■Rod End Bearings Accuracy
| Bearing I.D. | I.D. tolerance (H7) |
|---|---|
| 3 | +0.009 0 |
| 4 | +0.012 0 |
| 5 | |
| 6 | |
| 8 | +0.015 0 |
| 10 | |
| 12 | +0.018 0 |
| 14 | |
| 16 | |
| 18 | |
| 20 | +0.021 0 |
| 22 |
Performance info.
■Static Load Capacity of Rod End Bearings
| Bearing I.D. | Static Load Capacity Radial Ca (kN) | ||
|---|---|---|---|
| Steel | Oil-Free | Stainless Steel Oil Free | |
| 3 | - | 1.57 | - |
| 4 | - | 2.25 | - |
| 5 | 5.59 | 3.92 | 0.98 |
| 6 | 6.86 | 5 | 1.44 |
| 8 | 9.8 | 7.45 | 2.69 |
| 10 | 13.2 | 9.41 | 4.16 |
| 12 | 16.7 | 11 | 5.88 |
| 14 | 20.6 | 15.2 | 6.61 |
| 16 | 25 | 20.2 | 8.33 |
| 18 | 29.4 | 25.2 | 11.52 |
| 20 | 34.3 | 27.8 | - |
| 22 | 41.2 | 35.9 | - |
IDEA NOTE Separation and unloading of circular workpieces
Stacked circular workpieces are separated and unloaded by a single cylinder.
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Application Overview
Purpose
- Purpose
- To separate and unload stacked workpieces.
- Operation
- Claws connected with links are turned by the cylinder. As the cylinder extends, the lower claws unload the workpiece at the lowermost layer. At the same time, the upper claws retain the workpiece in the second layer from the bottom. As the cylinder retracts, the workpiece is detached from the upper claws and passed downward to the lower claws that have turned.
Target workpiece
- Shape: circular flanged pallet
- Size: φ100 x H10mm
- Weight: 1kg
- Maximum number of stacked workpieces: 5
Design Specifications
Operating Conditions or Design Requirements
- Outer dimensions: W350 x D250 x H68mm
- Separation and unloading of workpiece
- Claw operation angle: 45 degrees
- Cylinder
- stroke length: 21mm
Required Performance
- Workpiece weight
- 50N (when stacked at maximum)
Selection Criteria for Main Components
- Oil free bushing
- Environment resistance
- Low load
- Low speed
Design Evaluation
Verification of main components
- The cylinder thrust power is verified to see whether the workpiece feed motion is possible when the workpieces are stacked at the maximum amount.
- Check of feed motion with workpieces stacked
- Conditional value: workpiece m = 1kg, maximum number of stacked workpieces n = 5pieces, gravitational acceleration g = 9.8m/s², cylinder diameter = 20mm, supply pressure = 0.5MPa, link ratio (1) = cylinder-side arm:claw arm = 4:3, link ratio (2) = claw arm:claw = 6:5, cylinder thrust power = 157N, maximum angle formed by cylinder-side arm and claw arm θ = 45°, mechanical efficiency = 50%, friction coefficient μ1 = 0.2 (oil free bushing), friction coefficient μ2 = 0.2 (resin and metal)
- Claw operating force by cylinder: P = cylinder thrust power x link ratio (1) x link ratio (2) x mechanical efficiency x cos θ, therefore, P = 157 x （4/3） x （6/5） x 0.5 x cos (45°） = 88.8N
- Friction resistance due to workpiece weight: F = (μ1 + μ2) x m x n, therefore,
F = (0.2 + 0.2) x 1 x 5 = 2kg = 2 x 9.8 = 19.6N - Effective operation force P' = P - F = 88.8N - 19.6N ＝ 69.2N
From the above, the effective operation force P' = 69.2N while the overall workpiece weight is 5kg (49N). Therefore, the feed motion is possible.
Other Design Consideration
- Optimization of workpiece height and clearance between claws.
- Link does not require maintenance because of oil free bushing.
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