Fastener pre-tightening force control device

A control device and pre-tightening force technology, which is applied in the direction of threaded fasteners, locking fasteners, connecting components, etc., can solve the problems of inability to obtain the tightening force of fasteners and easy loosening of fasteners, and achieve improved fixing quality, simplify the installation process, and avoid misalignment

Pending Publication Date: 2019-11-05
ZHEJIANG HUADIAN EQUIP TESTING INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object to be achieved by the present invention is to provide a fastener pre-tightening force control device to solve the technical problem that existing operators cannot obtain the tightening force of fasteners and the fasteners are easy to loosen

Method used

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  • Fastener pre-tightening force control device
  • Fastener pre-tightening force control device
  • Fastener pre-tightening force control device

Examples

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Embodiment Construction

[0026] Such as figure 1 , figure 2 , image 3 As shown, a fastener pre-tightening force control device includes a gear reducer 1. The gear reducer 1 includes a housing 11, an input end 12 and an output end 13, between the input end 12 and the output end 13 A gear transmission mechanism is provided. The input end 12 is connected with a power unit 2. The power unit 2 can select a suitable power unit according to actual operation, such as a motor or a wrench. The output end 13 includes a pre-tightening force The connector 3, and the magnetic column 4 for identifying the rotation angle of the output end 13, the magnetic column 4 includes an N pole and an S pole, and the N pole is arranged at one end of the magnetic column 4, and the S pole is arranged on the other side of the magnetic column 4. At one end, the box 11 is also provided with a sensor 5 for detecting the rotation angle of the magnetic column 4, and a control chip 6 is connected to the sensor 5, and the control chip 6 ...

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Abstract

The invention relates to a fastener pre-tightening force control device. The fastener pre-tightening force control device comprises a gear reducer, wherein the gear reducer comprises an output end, the output end comprises a connecting head and a magnetic column, the magnetic column comprises an N pole and an S pole, the N pole is arranged at one end of the magnetic column, the S pole is arrangedat the other end of the magnetic column, and a sensor for detecting the rotation angle of the magnetic column is further arranged on a box body. The fastener pre-tightening force control device has the advantages that the rotation angle of the output end is identified through the magnetic column arranged on the output end, due to the fact that the rotation angle of a fastener during tightening isin a proportional relation with the sum of the bolt elongation and the loosening amount of a tightened part, and the fact that the deformation elongation of the fastener in the elastic area is in direct proportion to the rotation angle of the fastener, the pre-tightening force of the fastener can be accurately controlled by controlling the rotation angle of the fastener, the pre-tightening force dispersion degree of the fastener can be reduced, the pre-tightening force of the fastener reaches 70%-80% of the yield limit, the utilization rate of a material is improved, the fixing quality of thefastener is also improved, and the effects of being safe and reliable are achieved.

Description

Technical field [0001] The invention relates to a fastener pre-tightening force control device. Background technique [0002] Fasteners are a type of mechanical parts that are used for fastening connections and are extremely widely used. They are used to fasten two or more parts (or components) when they are fastened and connected as a whole. Generally speaking, the fasteners are connected by threaded connections. The performance of most threaded connections depends on the size and stability of their axial pre-tightening force. However, the operator cannot obtain the bolts in real time during the tightening process of the existing bolts. The pre-tightening force of the bolts causes insufficient pre-tightening force after the bolt is installed, which leads to unreliable bolt connection, or excessive pre-tightening force causes the bolt to fail, which leads to the technical problem that the bolt is easy to loosen. Summary of the invention [0003] The purpose of the present inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B39/00
CPCF16B39/00
Inventor 马恒伍川钱苗李清陈玲杨晓辉钱科张博
Owner ZHEJIANG HUADIAN EQUIP TESTING INST
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