Dead weight Rockwell hardness machine adopting screw type weight gradation loading technology

Abstract

The invention relates to a dead weight Rockwell hardness machine adopting a screw type weight gradation loading technology, and belongs to the field of hardness detection. The dead weight Rockwell hardness machine comprises a main shaft, a frame, an upper hoist, a lower hoist, a weight, a guidance mechanism, a motor driver and a screw type weight gradation loading device. The left supporting column and the right supporting column of the hardness machine are respectively provided with the screw gradation loading device which changes the test force of each level; according to load requirements,a motor drives a screw structure to rotate, and a zero sensor and a position sensor are cooperated to confirm a rotation angle to meet and realize the requirement of each scaleplate. According to thedead weight Rockwell hardness machine, the test force can be automatically changed, operation is convenient and quick, working strength is greatly lightened, in addition, an influence on a detection process by a scaleplate change process is eliminated, and the requirements of value transfer and traceability are met.

Description

technical field [0001] The invention relates to a deadweight Rockwell hardness machine adopting a spiral weight graded loading technology, which belongs to the field of hardness detection. Background technique [0002] With the development of science and technology, more and more fields put forward higher requirements for the quality of products. In the field of mechanical measurement, the Rockwell hardness tester has been widely used, mainly for testing the hardness of various steel materials (including alloy steel and stainless steel). According to the requirements of the verification regulations, the user must calibrate it regularly. [0003] As far as the current situation at home and abroad is concerned, there are many types of Rockwell hardness testers, but Rockwell hardness standard machines are rare. At present, some standard hardness machines produced in China use ball spline bearings on the top, and the friction force on the lifting spindle is large and uncertain...

AI Technical Summary

Problems solved by technology

[0003] As far as the current situation at home and abroad is concerned, there are many types of Rockwell hardness testers, but there are few Rockwell hardness standard machines.

At present, some standard hardness machines produced in China use ball spline bearings on the top, and the friction force on the lifting spindle is large and uncertain. After long-term use, the spindle will also wear out, which affects the accuracy and introduces the uncertainty of the error.

In addition, some hardness standard machines still use the manual wrench structure for the test force conversion device. When testing different hardness blocks, different loads need to be selected according to the type of hardness block. Hardness standard machines with a manual wrench structure need to be opened by the tester. For the main cabinet door, manually pull the handle to change the load, which is time-consuming and labor-intensive, and the work efficiency is low

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