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Detection method of self-trapping threaded sleeve drilling bottom hole and anti-stretching and anti-twist values

A detection method and self-tapping screw technology, which are applied in the direction of measuring device, mechanical measuring device, mechanical diameter measurement, etc., can solve the problems of hidden safety hazards, cumbersome detection methods, and no detection of tensile force, etc., and achieve low production cost and detection. The method is quick and easy, and the effect of eliminating hidden dangers of quality

Active Publication Date: 2013-05-08
ZHUZHOU ELECTRIC LOCOMOTIVE CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] In order to overcome the cumbersome detection method of the existing self-tapping screw sleeve bottom hole, and the lack of detection of tensile force and potential safety hazards, the present invention aims to provide a self-tapping screw sleeve bottom hole and detection of tensile and torsion values method, this method can solve the problem that the bottom hole diameter is affected by the vibration generated by the drilling tool and the person's own vibration before the self-tapping screw sleeve is installed, and the actual diameter of the bottom hole drilled is larger than the selected drill flower diameter, and the bottom hole diameter can be adjusted and perpendicularity meet the technical requirements, and finally improve the detection method of the anti-torsion value of the self-tapping screw sleeve after installation, and at the same time solve the detection of the tensile value after reaching the pre-tightening force

Method used

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  • Detection method of self-trapping threaded sleeve drilling bottom hole and anti-stretching and anti-twist values
  • Detection method of self-trapping threaded sleeve drilling bottom hole and anti-stretching and anti-twist values

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Embodiment Construction

[0033] A self-tapping screw sleeve drilling bottom hole and tensile and torsion value detection method, when drilling, select a drill flower 0.1mm~0.2mm smaller than the theoretical diameter, so that the drilled hole diameter reaches the theoretical diameter. For example, the diameter of the bottom hole of the M12×12 self-tapping screw sleeve is required to be 15mm. According to the working environment, choose a drill bottom hole of 14.8mm or 14.9mm. Compensation for aperture deviation caused by jitter. A large number of experiments have proved that the compensation parameter value of 0.1㎜~0.2㎜ is generally used for drilling bottom holes before installation of other specifications and models of self-tapping screw inserts.

[0034] Before installing the self-tapping screw insert, there is a technical range for the diameter of the bottom hole, that is, the maximum and minimum values ​​of the reference aperture. Within this range, the depth of engagement between the external thre...

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Abstract

The invention discloses a detection method of a self-trapping threaded sleeve drilling bottom hole and anti-stretching and anti-twist values and aims to solve the problems that the prior self-trapping threaded sleeve drilling bottom hole detection method is tedious, stretching resistance is not detected, and potential safety hazards exist. The detection method of the self-trapping threaded sleeve drilling bottom hole and the anti-stretching and anti-twist values comprises the following steps: 1) drilling a bottom hole; 2) detecting the bottom hole by adopting a hole diameter detection device; 3) detecting verticality; and 4) detecting anti-stretching and anti-twist values of the a self-trapping threaded sleeve by adopting an anti-stretching and anti-twist value measurement device. The detection method of the self-trapping threaded sleeve drilling bottom hole and the anti-stretching and anti-twist values improves the percent of once installment pass of the self-trapping threaded sleeve, eliminates potential quality hazard, and reduces reworking and production cost.

Description

technical field [0001] The invention relates to the field of detection of self-tapping screw sleeves for aluminum alloy car bodies of urban rail vehicles, in particular to a method for detecting bottom holes and tensile and torsion resistance values ​​of self-tapping screw sleeves. Background technique [0002] The existing bottom hole diameter parameters before installation of self-tapping screw inserts are provided by the supplier, without considering the irresistible situation of on-site operations, and the vibration generated by the drilling tool and the vibration of the person themselves will make the bottom hole diameter larger than the selected drill flower diameter. [0003] At present, measuring tools such as vernier calipers are generally used to measure the diameter of bottom holes. The detection speed is slow, the purchase price of measuring tools is relatively expensive, and the maintenance requirements are high. [0004] When the bottom hole is drilled, insert ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/12G01B5/245G01M13/00
Inventor 梁涛王玲
Owner ZHUZHOU ELECTRIC LOCOMOTIVE CO LTD
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