An automatic force value adjustment device for a micro Vickers hardness tester
A technology of Vickers hardness tester and adjustment device, which is applied in the direction of testing the hardness of materials, etc., and can solve problems such as the inability to ensure the uniform rotation of the weight handwheel, mechanical damage to the instrument, and the impact on the measurement accuracy of the instrument and the service life of the instrument.
Active Publication Date: 2015-09-16
SHANGHAI AOLONG XINGDI TESTING INSTR
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Problems solved by technology
Since the hand wheel of the weight cannot be guaranteed to rotate at a constant speed during manual operation, the weight will inevitably impact the weight rod during rotation.
If the rotation speed is uneven, it may even cause the weight rod to dislocate
In addition, the impact will cause mechanical damage to the instrument, thus affecting the measurement accuracy of the instrument and the service life of the instrument
Method used
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[0012] Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in detail, by figure 1 , figure 2 and image 3 As shown in the structural diagram of the automatic force value adjustment device of the micro-Vickers hardness tester of the present invention, the bottom plate 1 is fixed on the micro-Vickers hardness tester by screws, and the motor support 2 is fixed on the bottom plate 1. The motor support 2 The permanent magnet capacity-splitting synchronous motor 3 is fixed by screws, the permanent magnet capacity-separation synchronous motor 3 provides power for the loading and unloading cam 25, the loading and unloading cam 25 is in movable contact with the lever 26, and the loading and unloading cam 21 is fixed on the electronic coupling by screws 4, the electronic coupling 4 is connected to the motor shaft of the permanent magnet capacitive synchronous motor 3 through pins, wherein the disc shaft 5 is fixed on the electroni...
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The invention discloses an automatic force adjustment device for a micro-Vickers hardness meter. The automatic force adjustment device comprises a force adjustment unit and a handle. The handle is fixed to the force adjustment unit. The automatic force adjustment device is characterized in that the automatic force adjustment device comprises a variable load control board, a permanent-magnet synchronous motor, a variable load motor connection shaft and a variable load optical disk; the variable load control board controls the permanent-magnet synchronous motor to work by signals; the permanent-magnet synchronous motor is connected to the variable load optical disk by the variable load motor connection shaft; and a rotation speed of the permanent-magnet synchronous motor is in a range of 6-10 r / min. The automatic force adjustment device for a micro-Vickers hardness meter prevents that in manual rotation, over-fast falling of a weight is caused by weight gravity so that the weight impacts on a weight bar, and thoroughly solves the problem that the impact produced by loading force conversion influences measurement accuracy and a service life of an instrument.
Description
technical field [0001] The invention relates to a micro Vickers hardness tester, in particular to an automatic force value adjusting device of the micro Vickers hardness tester. Background technique [0002] The way to adjust the force value of the micro Vickers hardness tester produced by domestic manufacturers is manual. If the user needs to change the current loading force value of the hardness tester, the user needs to rotate the weight handwheel to the corresponding scale of the required force value and then enter the working interface from the control panel. The whole adjustment process is purely mechanical. Since the hand wheel of the weight cannot be guaranteed to rotate at a uniform speed during manual operation, the weight will inevitably impact the weight rod when rotating. If the rotation speed is uneven, it may even cause the weight rod to dislocate. In addition, the impact will cause mechanical damage to the instrument, thereby affecting the measurement accu...
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IPC IPC(8): G01N3/42
Inventor 李义彬王林祥叶飞
Owner SHANGHAI AOLONG XINGDI TESTING INSTR