Device for measuring shearing force of metal part

Abstract

The invention provides a device for measuring a shearing force of a metal part. The device comprises a large bottom plate, wherein a side support plate is connected above the large bottom plate and equipped with a forcemeter; a shaft end of the forcemeter is connected with one end of a working block and the other end of the working block is equipped with a bevel shearing surface and faces to one end of a module to be measured; the working block is fixedly connected with a clamping block and a working support block on a sliding plate which is arranged on a sliding chute on the large bottom plate; the other end of the module to be measured faces to a screw end of a revolving axle; a pushing block, a flange, a revolving support block, a locating block and a rocker arm are sleeved on the revolving axle in sequence from the screw end to a threaded end; the pushing block is fixed by the flange and the bottom of the pushing block is mounted on the sliding plate; and the bottom of the revolving support block is mounted on the sliding plate. The device of the invention has the advantages that the rigidity is good, the bearing is large, the processing is convenient, the cost is saved, the operation is simple, the measuring response speed and accuracy is high, the measurement is accurate, the running is stable and reliable, the direct reading can be achieved, the measuring efficiency is high, and the gap of measuring the shearing force in the weld assembly quality inspection of high-low voltage electrical equipment is filled.

Description

technical field [0001] The invention relates to the technical field of welding control of electric metal parts of high and low voltage electrical appliances, in particular to a metal part shear force measuring device. Background technique [0002] At present, the main application of measuring shear force is on bearing products, and the detection principle of its testing equipment is mainly to use the strain measurement method; specifically, a dynamic load is applied to the metal strain gauge attached in the middle of the testing bearing product, so that it is subjected to strain measurement. The local stress is obtained, and the strain-stress curve is fitted according to the local stress data, and the stress is calculated inversely on the curve, and then the shear force of the support is calculated; The force-bearing area and friction coefficient are calculated by using the support shear force calculation formula; the principle application is reflected in: 201010160564.3 pat...

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Problems solved by technology

[0002] At present, the main application of measuring shear force is on bearing products, and the detection principle of its testing equipment is mainly to use the strain measurement method; specifically, a dynamic load is applied to the metal strain gauge attached in the middle of the testing bearing product, so that it is subjected to strain measurement. The local stress is obtained, and the strain-stress curve is fitted according to the local stress data, and the stress is calculated inversely on the curve, and then the shear force of the support is calculated; The force-bearing area and friction coefficient are calculated by using the support shear force calculation formula; the principle application is reflected in: 201010160564.3 patent number "one-way support shear force measurement device and measurement method", 200810186045.7 patent number "microcomputer control Electro-hydraulic servo multi-functional compression-shear testing machine: Patent No. 200710044755.1, which is used to detect product shear stress wrinkling, introduces "metal sheet shear stress wrinkling test method and test device, etc. The disadvantage is that the calibration and solution process of shear force is complicated and difficult to detect. The test equipment is complex, bulky, high cost, and low detection efficiency; in engineering production, high efficiency, direct reading, simple and convenient, accurate measurement accuracy, large measuring range, and batch inspection testing equipment suitable for mass production are often required in engineering production;

[0003] For example, the AC contactors of high and low voltage electrical appliances, the electromagnetic tripping parts of low voltage circuit breakers, contacts, brackets and other welded parts are tested for firm welding. Ultrasonic nondestructive testing is usually used to detect a fusion welding area on the horizontal plane, and the welding combination in the vertical direction The depth is not reflected, and cannot fully reflect the real situation and strength of the welding. Currently, destructive peeling is used to test and verify the depth of the welding joint and determine the firmness. With the development of the industrial product economy, more products are required to improve the grade and quality. Its carrying capacity, machinery or service life put forward higher requirements, and it has been promoted to a high-end or quality-trusted product brand. Many companies have invested in the research and development of testing equipment suitable for mass production and batch inspection.

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