Arrangement method of heat characteristic monitoring measurement points of numerical control machine

A technology of CNC machine tools and layout methods, which is applied to measuring/indicating equipment, metal processing mechanical parts, metal processing equipment, etc. The effect of accuracy

Inactive Publication Date: 2011-09-14
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the selection of measuring points for monitoring the thermal characteristics of CNC machine tools mainly depends on experienc...

Method used

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  • Arrangement method of heat characteristic monitoring measurement points of numerical control machine
  • Arrangement method of heat characteristic monitoring measurement points of numerical control machine
  • Arrangement method of heat characteristic monitoring measurement points of numerical control machine

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Embodiment 1

[0036] The present invention will be further described below in conjunction with drawings and embodiments.

[0037] Such as figure 2 As shown, the machine tool adopts CNC milling machine XK713, and its three-way travel in the X-axis direction, Y-axis direction and Z-axis direction is 600×400×500mm. Measuring points, select different measuring points T1~T15 for detecting temperature changes on the CNC milling machine body, T1~T5 are on the column of the CNC milling machine bed, T6~T8 are on the base of the CNC milling machine bed, T9 ~T10 is on the screw bearing seat of the CNC milling machine, T11 is on the lower end cover of the spindle of the CNC milling machine, T12~T15 is on the spindle sleeve of the CNC milling machine, and then 15 thermal resistance PT100 temperature sensors are installed at the measuring points T1~T15, Used to collect temperature changes.

[0038] A laser displacement sensor (LK-G5000) is used to measure the deformation of the tool tip relative to th...

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Abstract

The invention discloses an arrangement method of heat characteristic monitoring measurement points of a numerical control machine. The method comprises the following steps of: (1) selecting measurement points on a numerical control machine body, and acquiring temperature values of the measurement points under different time and deformation of a tool nose position relative to a workpiece under different time according to the frequency to form a temperature change sequence X of the measurement points and a deformation sequence delta of the tool nose position relative to the workpiece; (2) calculating temperature correlation coefficients according to the temperature change sequence X of the measurement points, and dividing the measurement points into groups; (3) performing heat sensitivity calculation on the measurement points in each group according to the data of the temperature change sequence X of the measurement points and the deformation sequence delta of the tool nose position relative to the workpiece, and selecting the measurement points with highest heat sensitivity in each group to form a selection group; and (4) selecting the measurement points serving as the heat characteristic monitoring measurement points of the numerical control machine from the selection group according to different arrangement number of the heat characteristic monitoring measurement points of the numerical control machine. The method disclosed by the invention has the advantages of simplicity, effectiveness, clear principle, simplicity in operation, good controllability and the like.

Description

technical field [0001] The invention relates to the field of thermal characteristic monitoring of a numerically controlled machine tool, in particular to a method for arranging measuring points in monitoring the thermal characteristic of a numerically controlled machine tool. Background technique [0002] The machining accuracy of CNC machine tools is an important indicator to measure the performance of CNC machine tools. A large number of studies have shown that thermal error is the largest error source of precision machining machinery such as CNC machine tools, accounting for about 70% of the total error. For ultra-precision machine tools, Even reaching nearly 90%. Due to the inevitable existence of internal and external heat sources in the machining process of CNC machine tools, especially internal heat sources, it will inevitably lead to thermal deformation errors. Therefore, it is very important to monitor the thermal characteristics of CNC machine tools and control th...

Claims

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Application Information

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IPC IPC(8): B23Q17/00B23Q17/22
Inventor 贺永傅建中沈洪垚陈子辰
Owner ZHEJIANG UNIV
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