Measuring device and evaluation method for dynamic stiffness of grinding machine tailstock
A measurement method and technology of dynamic stiffness, which are applied in the field of grinding machine tailstock measuring devices, can solve the problems that the dynamic stiffness of the grinding machine tailstock varies greatly and cannot correctly reflect the anti-vibration ability of the grinder tailstock structure, so as to optimize the structure of the grinder tailstock, Effect of reducing vibration and improving product quality
Active Publication Date: 2021-04-30
UNIV OF SHANGHAI FOR SCI & TECH
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However, since the grinding system is a complex dynamic system, people often only measure the static stiffness of the tailstock of the grinder when measuring the stiffness, which is very different from the dynamic stiffness of the tailstock of the grinder in the actual grinding process, and cannot correctly reflect Anti-vibration Ability of Grinding Machine Tailstock Structure
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[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0035] Such as Figure 1 to Figure 6 As shown, a grinding machine tailstock dynamic stiffness measurement device includes a headstock 5, a headstock tip 6, a workpiece 8, a grinding wheel 7, a truncated grinder tailstock tip 1, a force sensor 2, and 6 non-contact eddy current sensors 3. Signal amplifier, AD acquisition card and computer. The truncated grinding machine tailstock tip 1 is installed on the tailstock sleeve 4, and the truncated grinding machine tailstock tip 1 is connected to the force sensor 2 in the middle; 6 non-contact eddy current sensors 3 are respectively fixed on the grinding machine with magnetic bases. On the stage, it is used to measure the vibration amplitude of the three parts of the grinding machine tailstock, the sleeve and the shell in the X and Y directions. The dynamic force and voltage signals collected by the force sens...
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The invention relates to a dynamic stiffness measurement device and evaluation method of a grinder tailstock. In the device, a force sensor is connected to the center of the center of the grinder tailstock after truncation; 6 non-contact eddy current sensors are respectively fixed on the grinder workbench with magnetic bases It is used to measure the amplitude of the X and Y directions of the grinding machine tailstock tip, sleeve and shell. The dynamic force voltage signal collected by the force sensor and the amplitude signal collected by the non-contact eddy current sensor pass through the signal line respectively, and then pass through the The signal amplifier and AD acquisition card are transmitted to the computer. The evaluation method includes calculating the dynamic stiffness and dynamic stiffness difference of the grinding machine tailstock tip, sleeve and shell in the X and Y directions when the machine tool is in the air transport and grinding state, and comparing with the respective set thresholds to check the grinding machine tailstock. Whether the dynamic stiffness of the top of the frame, the sleeve and the shell meets the requirements and whether the overall dynamic stiffness of the tailstock meets the requirements.
Description
technical field [0001] The invention relates to a measuring device for a grinder tailstock, in particular to a measuring device and an evaluation method for the dynamic stiffness of a grinder tailstock. Background technique [0002] The tailstock of the grinder is one of the important parts of the grinder. When the grinder is grinding the workpiece, the tailstock of the grinder cooperates with the headstock of the grinder to support and center the workpiece, such as figure 1 shown. The design size and layout form of the CNC grinding machine tailstock structure determine its own various dynamic characteristics, including static and dynamic stiffness. The unreasonable design of the tailstock structure will lead to insufficient rigidity of the tailstock, and the large deformation and vibration of the tailstock under the action of the gravity of the workpiece will reduce the machining accuracy of the parts. Therefore, improving the anti-vibration ability of the tailstock struc...
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IPC IPC(8): G01M5/00
CPCG01M13/00
Inventor 迟玉伦刘斌沈奕锋谭绍东
Owner UNIV OF SHANGHAI FOR SCI & TECH