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Testing device for relationship between pre-tightening force and torque for threaded fastening connection

A technology of tightening connection and test test, which is applied to measure the direction of torque/torsion force during tightening, which can solve problems such as assembly simulation, and achieve the effects of enhanced applicability, ease of manufacture, and high measurement accuracy.

Inactive Publication Date: 2012-07-18
CHINA AEROSPACE STANDARDIZATION INST
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0013] The invention provides a test device for testing the relationship between pretightening force and torque of threaded fastening connection, which solves the problem of synchronous measurement of torque and pretightening force in threaded fastening connection assembly simulation and assembly process

Method used

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  • Testing device for relationship between pre-tightening force and torque for threaded fastening connection
  • Testing device for relationship between pre-tightening force and torque for threaded fastening connection
  • Testing device for relationship between pre-tightening force and torque for threaded fastening connection

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Embodiment Construction

[0040] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0041] The design idea of ​​the present invention is

[0042] (1) Design the simulation structure of threaded fastening connection assembly

[0043] a. During actual assembly, the threaded fastener is to connect and fix two independent connected parts. The present invention adopts a split structure and designs two storage tables for placing fixtures for simulating connected parts.

[0044] b. The two storage tables are connected by screws, which is convenient for adjusting the position between the storage tables, so as to meet the experimental simulation requirements of different bolt lengths and thicknesses of the connected parts.

[0045] c. Two storage tables are placed on smooth guide rails for easy movement and torque loading.

[0046] d. Design fixtures for threaded fastening connections.

[0047] (2) Design the force value transmission structure...

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Abstract

The invention relates to a testing device for a relationship between a pre-tightening force and a torque for threaded fastening connection. The testing device comprises a torque sensor, a torque sensor supporting seat, a three-jaw chuck, a right article placement table, a right clamp, a left clamp, a long screw, a limiting block, a left article placement table, a clamp seat, a supporting seat, a smooth guide rail, a double-end screw, a hand wheel, a pressing plate, a pressure sensor, a chain, a chain wheel, a nut and a fixed pressing plate bolt. By adoption of the testing device, assembly connection of threaded fasteners which comprise bolts with different lengths and connected pieces with different thicknesses can be effectively stimulated. The testing device is slightly influenced by a bolt structure and convenient in test operation, has a function of synchronously measuring an installation torque and the pre-tightening force, and provides test conditions for acquisition of the relationship (a tension relationship) between the torque and the pre-tightening force.

Description

technical field [0001] The invention relates to the technical field of testing the relationship between pretightening force and torque of threaded fastening connections, in particular to a test device for testing the relationship between pretightening force and torque of threaded fastening connections. Background technique [0002] When threaded fasteners are assembled, the applied assembly torque will generate a corresponding tension (that is, pre-tightening force) on the bolt. The corresponding relationship between this assembly torque and pre-tightening force is usually called the torsion-tension relationship. The pretightening force is a key indicator for the design of threaded fastened connection structures. However, since it is difficult to directly measure the pretightening force in actual assembly, it is necessary to convert the pretightening force index proposed in the design into the assembly torque value by using the torsion-tension relationship, and indirectly thr...

Claims

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Application Information

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IPC IPC(8): G01L5/24
Inventor 孙升李健
Owner CHINA AEROSPACE STANDARDIZATION INST
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