中文版Application Cases
Model
The role of the bolt is to tighten, and it is conceivable that the preload (clamping force) is the most important measurement parameter. However, the pre-tightening force can not be directly measured like torque. It can only be measured by indirect method. The measuring method is also varied. The traditional method includes strain gauge method and washer sensor method, while ultrasonic wave is used to measure the pre-tightening force compared with other methods. The method does have many advantages, and can achieve non-destructive measurement, real measurement, information preservation, and cost saving.
Model
Practice and theory are the left and right legs of human knowledge learning. Recently, Xiao Yan discovered that the left leg of the domestic fastening industry has become more and more sturdy, but the right leg is somewhat thin, and the theory is more or less lacking, including Xiao Yan himself. It's time to arm yourself with theory, and there is a book that will hold you armed.
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Design Software for Fastening System
Screw-Designer: Non-linear Calculation Software
Non-linear over-elastic analytical screw-calculation beyond VDI 2230
Advantages:
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Large list of different geometries and materials
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Scatter of material strength and friction coefficients covered
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Over-elastic tightening and operating
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Calculation of non-linear opening of interface
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Min. and max. safety factors
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Total assessment of bearing capacity
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Minimum inputs necessary (1 to app. 100)
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Maximum outputs (app. 500 values)
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Integrated diagrams
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Preload development over live time
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Documentation
Screw-Designer: Function Comparation
Non-linear over-elastic analytical screw-calculation beyond VDI 2230
| # | Special features | Other Providers |
| 1 | Calculation of overelastic behaviour reg. tightening and operating (angular controlled tightening over yield-point) | Not available |
| 2 | Consideration of 5 clamped parts with individual materials, geometries and surface pressure limit | Weak |
| 3 | Scatter of material strength and friction coefficients covered | Have |
| 4 | Consideration of material strength degradation at elevated temperatures | Not available |
| 5 | Calculation of eccentric clamping and eccentric loading | Not available |
| 6 | Calculation of non-linear opening of component contact interface | Not available |
| 7 | Min. and max. safety factors | Not available |
| 8 | Preload development over live time | Not available |
| 9 | Overall assessment of loading capacity | Not available |
| 10 | Embedded database with list of predefined geometries and materials | Not available |
| 11 | Extension of database with own parameters possible | Not available |
| 12 | Integrated help function for parameters | Have |
Screw-Designer: Non-linear Calculation Software
EXTENDED FUNCTIONS BEYOND VDI 2230
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Consideration of all relevant deviations in the complete assessment
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Elastic-plastic material behavior including strength degradation at elevated temperatures!
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Calculation of overelastic tightening including recommendation of tightening specification
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Evaluation of preload history (live-cycle orientation)
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Tightening preload
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Preload after seating
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Preload at begin of temperature loading
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Residual preload at temperature
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Resid. preload at room temperature (cold)
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Clamping load at temperature
Screw-Designer: Non-linear Calculation Software
STANDARD DATABASE
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Huge standard data base contains extensive list of parameters for many used materials and geometries for engineering design. Thus it is also a big compendium of materials.
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Extensible with own definitions
Geometrical definitions:
- 213 thread dimensions (M1 to M100x2 fine thread) in 6 tolerances teach for inner and outer thread
- various screw geometries (drives, bearing surfaces etc.)
- Material definitions:55 screw materials (incl. steel, stainless steal, aluminum, titanium, copper etc.)
- 137 materials for clamped parts and nut thread components
Material definitions:
55 screw materials (incl. steel, stainless steal, aluminum, titanium, copper etc.)
137 materials for clamped parts and nut thread components