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- inCAD Library Home
- > No.000029 Air Flow Confirmation Fixture
No.000029 Air Flow Confirmation Fixture
38
38
Uniform load retention with two springs
Relevant category
Hand Valve
| Product name | One-Touch Coupling Shut-Off Valves |
|---|---|
| Part number | BVHVU4-3 |
| Features | Residual Pressure Relief Valves |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
For an operator to control the inspection timing.
Available sizes
■One-Touch Coupling Shut-Off Valves
| (Tube DIA.) | Number of circuits | Handle color | Effective cross section area (mm2) |
|---|---|---|---|
| φ4 | 2way valve・3way valve | Blue・Red | 3.4 |
| φ6 | 7.2 | ||
| φ8 | 8.7 | ||
| φ10 | 17.4 | ||
| φ12 | 18.1 |
O Ring
| Product name | O-Rings - P Series |
|---|---|
| Part number | NPA5 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Economical and proven airtight component.
Available sizes
■O-Rings - P Series
| Material | Hardness (JIS Hs) | Color | Usable temperature range | JIS Symbol | Purpose |
|---|---|---|---|---|---|
| Nitrile rubber | 70±5 | Black | －30-100℃ | Class1A | Mineral oil resistant |
| 90±5 | Black | －25-100℃ | Class1B | ||
| Silicon rubber | 50±5 | Milky white | －50-200℃ | − | Heat resistant |
| 70±5 | Dark blue | －50-200℃ | Class4C | ||
| Fluorine rubber | 70±5 | Black | －15-200℃ | Class4D | |
| 90±5 | Black | －15-200℃ | − | ||
| Ethylene- propylene rubber | 70±5 | Black | －45-130℃ | − | Weather resistant |
Sizes and Dimensions(Excerpt)
| JIS nominal number | Ring I.D. | Ring Wire DIA. | Mating side DIA. | |
|---|---|---|---|---|
| Against O ring | ||||
| Internal contact | External contact | |||
| P3 | φ2.8 | φ1.9 | φ3 | φ6 |
| P4 | φ3.8 | φ4 | φ7 | |
| P5 | φ4.8 | φ5 | φ8 | |
| P6 | φ5.8 | φ6 | φ9 | |
| P7 | φ6.8 | φ7 | φ10 | |
| P8 | φ7.8 | φ8 | φ11 | |
| P9 | φ8.8 | φ9 | φ12 | |
| P10 | φ9.8 | φ10 | φ13 | |
| P10A | φ9.8 | φ2.4 | φ10 | φ14 |
| P11 | φ10.8 | φ11 | φ15 | |
| P11.2 | φ11 | φ11.2 | φ15.2 | |
| P12 | φ11.8 | φ12 | φ16 | |
| P12.5 | φ12.3 | φ12.5 | φ16.5 | |
| P14 | φ13.8 | φ14 | φ18 | |
| P15 | φ14.8 | φ15 | φ19 | |
| P16 | φ15.8 | φ16 | φ20 | |
| P18 | φ17.8 | φ18 | φ22 | |
| P20 | φ19.8 | φ20 | φ24 | |
| P21 | φ20.8 | φ21 | φ25 | |
| P22 | φ21.8 | φ22 | φ26 | |
＊Please see the product pages for other diameter rings.
Accuracy Info
■Accuracy of O ring P series
Ring wire DIA. tolerance:
| Wire DIA. | tolerance |
|---|---|
| φ1.9 | ±0.08 |
| φ2.4 | ±0.09 |
| φ3.5 | ±0.10 |
| φ5.7 | ±0.13 |
Parting surface burr height: 0.1 or less
Parting surface burr width: 0.15 or less
Ring I.D. tolerance:
| JIS nominal number | Ring I.D. | Tolerance | ||
|---|---|---|---|---|
| Nitrile | Silicon | Fluorine | ||
| Ethylene | ||||
| P3 | φ2.8 | ±0.14 | ±0.21 | ±0.16 |
| P4 | φ3.8 | |||
| P5 | φ4.8 | ±0.15 | ±0.22 | ±0.18 |
| P6 | φ5.8 | |||
| P7 | φ6.8 | ±0.16 | ±0.24 | ±0.19 |
| P8 | φ7.8 | |||
| P9 | φ8.8 | ±0.17 | ±0.25 | ±0.20 |
| P10 | φ9.8 | |||
| P10A | φ9.8 | |||
| P11 | φ10.8 | ±0.18 | ±0.27 | ±0.21 |
| P11.2 | φ11 | |||
| P12 | φ11.8 | ±0.19 | ±0.28 | ±0.22 |
| P12.5 | φ12.3 | |||
| P14 | φ13.8 | |||
| P15 | φ14.8 | ±0.20 | ±0.30 | ±0.24 |
| P16 | φ15.8 | |||
| P18 | φ17.8 | ±0.21 | ±0.31 | ±0.25 |
| P20 | φ19.8 | ±0.22 | ±0.33 | ±0.26 |
| P21 | φ20.8 | ±0.23 | ±0.34 | ±0.27 |
| P22 | φ21.8 | ±0.24 | ±0.36 | ±0.28 |
| P22A | φ21.7 | |||
| P22.4 | φ22.1 | |||
| P24 | φ23.7 | |||
| P25 | φ24.7 | ±0.25 | ±0.37 | ±0.30 |
| P25.5 | φ25.2 | |||
| P26 | φ25.7 | ±0.26 | ±0.39 | ±0.31 |
| P28 | φ27.7 | ±0.28 | ±0.42 | ±0.33 |
| P29 | φ28.7 | ±0.29 | ±0.43 | ±0.34 |
| P29.5 | φ29.2 | |||
| P30 | φ29.7 | |||
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Application Overview
Purpose
- A fixture that applies a uniform force to hold down a resin tube.
- This setup is designed for measurement of fluid flow rate through resin tube.
Points for use
- This setup is vertically mounted and the resin tube is manually secured by toggle clamps.
- An o-ring is used to prevent fluid leakage .
Target workpiece
- Resin tubing
External dims.: W70 x D44 x H18
Weight: 25g
Design Specifications
Operating Conditions or Design Requirements
- Toggle clamp stroke: 17mm
- Spring deflection: 7mm
- External dims.: W220 x D210 x H127 (max.)
Required Performance
- Workpiece retaining load: 23.5N
Selection Criteria for Main Components
- Toggle clamp
- Side push type since horizontal motion is required.
- Linear guide
- While the moment load is minimal, select the appropriate miniature linear guide that matches the fixture size.
Design Evaluation
Verification of main components
- Select a spring capable of retaining the workpiece.
- Spring load
- Calculation formula: F = kx
- Assumed load: F = 23.5N (for 2 springs)
- Assumed deflection when pressure applied: x = 12mm (When set 5mm (Set length: 20mm, Free length: 25mm), When stroked 7mm)
- Spring constant: k = 23.5 / 2 / 12 = 0.98N/mm selected
Other Design Consideration
- Based on the calculated forces required, select a spring stiffness that can reliably clamp the workpiece.
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