Device and method for detecting machine tool accuracy under loading state

A technology for precision detection and measurement devices, applied in measurement devices, instruments, etc., can solve problems such as slow dynamic response, and achieve the effect of wide application range, convenient installation and strong application value

Active Publication Date: 2020-02-18
SHANGHAI TOPNC NUMERICAL CONTROL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are two types of control methods for piezoelectric stacks: open-loop and closed-loop. The closed-loop type is equipped with a sensor that provides a feedback signal on the piezoelectric stack, which has higher displacement accuracy, but at the same time will result in slower dynamic response.

Method used

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  • Device and method for detecting machine tool accuracy under loading state
  • Device and method for detecting machine tool accuracy under loading state
  • Device and method for detecting machine tool accuracy under loading state

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Embodiment Construction

[0047] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the inventive concept. These all belong to the protection scope of the present invention.

[0048] like figure 1 and figure 2 As shown, a machine tool accuracy detection device in a loaded state provided according to the present invention includes a machine tool spindle 12, a machine tool spindle connecting frame 1, a measuring device, a base connecting frame 14 and a base 8, wherein: the machine tool spindle connecting frame 1 is connected to One end of the machine tool spindle 12 and the measuring device, the long rod on the machine tool spindle connecting frame 1 is inserted into the tool handle ...

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Abstract

The invention provides a machine tool precision detection device and method under a loading state. The system comprises a machine tool spindle, a machine tool spindle connection frame, a measurement device, a base connection frame and a base, wherein the machine tool spindle connection frame connects the machine tool spindle and one end of the measurement device; and the base connection frame connects the base and the other end of the measurement device. During the measurement, the base is mounted on a machine tool table. The rotation center of the base connection frame is rotated relative tothe rotation center of the machine tool spindle connection frame at a certain distance. At the same time, a piezoelectric actuator on the measurement device generates a load of a certain frequency between the machine tool spindle and the machine tool table, and an LVDT displacement sensor is used to measure the relative displacement of the machine tool spindle and the machine tool table, so as toachieve the measurement of the multi-degree-of-freedom spatial motion accuracy of the machine tool.

Description

technical field [0001] The invention belongs to the field of machine tool inspection, relates to the measurement of the dynamic geometric accuracy of a machine tool, and in particular relates to a device and method for detecting the machine tool accuracy in a loaded state. Background technique [0002] With the continuous development of modern manufacturing, higher and higher requirements are put forward for the machining accuracy of CNC machine tools, and the detection methods are constantly being updated. The machining accuracy detection of machine tools mainly focuses on the detection of the geometric accuracy of the machine tool. Now the commonly used methods include the detection of the positioning accuracy of the laser interferometer and the detection of the dynamic accuracy of the ballbar. [0003] Using the inverse piezoelectric effect of piezoelectric materials, the voltage control signal applied at both ends of the piezoelectric ceramic is converted into mechanical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00
CPCG01B21/00
Inventor 毕庆贞
Owner SHANGHAI TOPNC NUMERICAL CONTROL TECH CO LTD
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