Device for studying the effect of vibration on precision measurement of machine tool spindles

Abstract

The invention relates to a device for investigating impacts of vibration to precise measurement of a machine tool main shaft. A bed seat plate, an isolation vibration layer and test platform are overlaid in sequence. The bed seat plate and the test platform are connected by several upper clutching positioning mechanisms, lower clutching positioning mechanisms and horizontal clutching positioning mechanisms located on the bed base plate according to the six-point-positioning principle. The false and true clutching between the bed seat plate and the test platform is achieved through the clutching lugs and clutching knobs in the three clutching mechanisms. A clutching sensor detects whether resonance exists in the working table of the machine tool. According to the device for investigating impacts of vibration to the precise measurement of a machine tool main shaft, through the simple adjustment of whether the clutching knob is fastened, the actual displacement condition of the rotation of the machine tool main shaft in space can be tested, and relative displacement of the cutters to the working pieces can also be tested; through the replacement of different sensor clamps and the coordination of corresponding sensors, the device can satisfy the requirements of precise measurement of machine tool main shaft rotation with two-point method, three-point method and four-pint method, and the roundness errors, cylindricity errors and the like of the shaft can be measure and assessed.

Description

technical field [0001] The invention relates to a machine tool precision testing device, mainly a device for measuring the vibration displacement of a machine tool spindle, in particular to a device for analyzing the influence of vibration noise on the vibration displacement measurement of the machine tool spindle. Background technique [0002] During the machining of mechanical parts by machine tools, the vibration generated by the spindle has a great influence on the machining accuracy of the product, as well as the wear and life of the tool. The processing of high-precision mechanical parts has very high requirements on the rotation accuracy, roundness accuracy, and cylindricity accuracy of the machine tool spindle. Spindle rotation error, roundness error, cylindricity error, etc. are important indicators to measure the accuracy of machining centers and machine tools. Usually, they can be tested and evaluated by two-way method and three-point method. Through measurement,...

AI Technical Summary

Problems solved by technology

[0009] However, the existing experimental devices for measuring spindle rotation accuracy, such as "mixed multi-method test device for spindle rotation accuracy measurement experiment" (CN105033759A), although they can be used for various experimental purposes to collect radial displacement experiments when the spindle rotates, And the positioning accuracy of the sensor is guaranteed, but it does not take into account the impact of the vibration of the bed body on the test of the spindle rotation accuracy caused by the power source and transmission instability during the rotation of the spindle, so it is impossible to compare whether the vibration is on the test of the spindle rotation accuracy of the machine tool Impact

Although the existing vibration isolation platform, such as "passive vibration isolation platform" (CN204083050U), can also play the role of vibration isolation, but it cannot be directly used for the test of the rotation accuracy of the machine tool spindle: first, because of the inconvenience of its structure installation and adjustment, it cannot Adapt to precise testing; secondly, because the existing vibration isolation platform cannot isolate the vibration under the condition that the position of the test sensor remains unchanged

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