JPS5657928A - Looseness detecting method of screw tightening part - Google Patents
Looseness detecting method of screw tightening partInfo
- Publication number
- JPS5657928A JPS5657928A JP13293879A JP13293879A JPS5657928A JP S5657928 A JPS5657928 A JP S5657928A JP 13293879 A JP13293879 A JP 13293879A JP 13293879 A JP13293879 A JP 13293879A JP S5657928 A JPS5657928 A JP S5657928A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- torque
- point
- tightening
- looseness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
PURPOSE: To detect the looseness at the screw tightening part from the position of the inflection point of the characteristic curve between the relative rotational angle and the tightening torque in case the screw tightening is increased.
CONSTITUTION: The tightening is increased to the screw 1 by means of the torque wrench 2 possessing the rotational angle detector 3 and the torque detector 4, and the characteristic curve at that moment is obtained. With the characteristic curve in which the rotational angle Ψ and the torque T are set as the horizontal and vertical axes respectively, no looseness of the screw is decided if a coincidence is obtained between the torque point (a) from the initial tightening Ψ a and the point (d) where the nut starts rotation (curve A). And some looseness of the screw is decided in case the point (d) is lower than the point (a) (curve B).
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13293879A JPS5657928A (en) | 1979-10-17 | 1979-10-17 | Looseness detecting method of screw tightening part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13293879A JPS5657928A (en) | 1979-10-17 | 1979-10-17 | Looseness detecting method of screw tightening part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5657928A true JPS5657928A (en) | 1981-05-20 |
Family
ID=15093003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13293879A Pending JPS5657928A (en) | 1979-10-17 | 1979-10-17 | Looseness detecting method of screw tightening part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5657928A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4608872A (en) * | 1983-08-09 | 1986-09-02 | Dr. Staiger, Mohilo & Co., Gmbh | Hand-operated ratchet spanner for tightening screws |
| US5211061A (en) * | 1991-07-16 | 1993-05-18 | Goodwin Jerry J | Bolt clamping force sensor and clamping force validation method |
| JP2008203264A (en) * | 2007-02-22 | 2008-09-04 | Eduard Wille Gmbh & Co Kg | Angle measuring apparatus |
| CN102706504A (en) * | 2012-05-22 | 2012-10-03 | 西南交通大学 | Bolt looseness detecting device of pantograph type current collector of high-speed train |
-
1979
- 1979-10-17 JP JP13293879A patent/JPS5657928A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4608872A (en) * | 1983-08-09 | 1986-09-02 | Dr. Staiger, Mohilo & Co., Gmbh | Hand-operated ratchet spanner for tightening screws |
| US5211061A (en) * | 1991-07-16 | 1993-05-18 | Goodwin Jerry J | Bolt clamping force sensor and clamping force validation method |
| JP2008203264A (en) * | 2007-02-22 | 2008-09-04 | Eduard Wille Gmbh & Co Kg | Angle measuring apparatus |
| CN102706504A (en) * | 2012-05-22 | 2012-10-03 | 西南交通大学 | Bolt looseness detecting device of pantograph type current collector of high-speed train |
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