Automatic turret type electronic mainshaft measuring unit of Brinell hardness tester

Abstract

The invention discloses an automatic turret type electronic mainshaft measuring unit of a Brinell hardness tester, which comprises an automatic turret mechanism, a weighing and force-measuring mechanism, a mainshaft anti-rotating mechanism, an accurate photoelectric measuring system and an electric control system; the lower end of an upper guide shaft is connected with the upper part of a force-transmission support seat by a weighting sensor; a turret is arranged in an inner cavity of a lower guide shaft which is fixedly arranged at the lower part of the force-transmission support seat, a turret gear connected with a turret driving mechanism is fixedly arranged at the upper end of the turret which is provided with a pressure head and two optical lenses, and a photoelectric switch and a turret locating block which is matched with a turret localizer arranged at the lower end of the lower guide shaft are arranged at the lower end of the turret; and a photoelectric micrometer and the two optical lenses form the accurate photoelectric measuring system. The automatic turret type electronic mainshaft measuring unit ensures that the hardness tester is integrated with the accurate photoelectric measuring system, realizes the accurate position conversion between the pressure head and the optical lenses and the accurate measurement of electronic stress application and indentation, can bear larger testing force and has simple operation, thereby being convenient for achieving the automation, lightening the labor intensity and improving the working efficiency.

Description

1. Technical field [0001] The invention relates to a Brinell hardness tester, in particular to an automatic turret type electronic Brinell hardness tester spindle measuring unit. 2. Background technology [0002] In the traditional Brinell hardness tester, the special indenter for the hardness tester is directly installed on the main shaft of the hardness tester, and the pressure transmission pressure shaft transmits the test force to the main shaft through the transition spring; although the main shaft itself has a simple structure, it needs to be placed on the working table of the hardness tester A force limiting device is added on the hand wheel, and the actual operation is more troublesome. [0003] The test procedure for the test piece is as follows: (1) Rotate the hand wheel of the workbench, let the test piece pass the indenter to lift the main shaft, and eliminate the axial clearance of the main shaft. (2) After the relative rotation of the hand wheel and the nut, p...

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Problems solved by technology

[0004] The problems existing in the above-mentioned traditional Brinell hardness tester are: (1) the spindle mechanism is too simple to install an optical measuring mechanism for measuring the indentation diameter, resulting in the separation of the hardness tester and the optical measuring mechanism

(2) The main shaft mechanism must be connected with the pressure transmission shaft through a transition spring, and there is a gap in the axial direction of the main shaft. It is required that a force limiting mechanism must be set on the handwheel of the workbench of the hardness tester. It can be seen that although the main shaft is simple, the matching is complicated. up

(3) The test operation is cumbersome, with high labor intensity and low efficiency

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