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Method for promoting machine precision of machine tool

A technology of processing accuracy and machine tools, which is applied in the direction of metal processing, metal processing equipment, metal processing machinery parts, etc., can solve the problems of large influence of fine boring processing, difficulty in ensuring the precision of hole fine boring, and easy resonance, etc., so as to improve processing accuracy and The effect of processing efficiency

Inactive Publication Date: 2006-04-26
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of fine boring, because the main shaft is always rotating at a fixed speed during the machining process, the speed of the rotating shaft itself will generate a fixed frequency of vibration, and due to the boring bar on the main shaft and the processed Most of the parts are ferrous metals, and their natural frequencies are very close, so they are very easy to cause resonance during the processing of the parts. Therefore, the coaxiality and roughness of the holes, especially the multi-layer holes The impact of fine boring processing of holes with high requirements is very large, so it is difficult to ensure the fine boring accuracy of holes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: a drilling machine adopting the above method, the rotational speed of the drill bit is variable during the drilling process, and its advantages are: 1. The chip removal ability of the drill bit is improved to prevent the drill bit from breaking; Accuracy, the hole wall is corrected when the speed is slow; 3. Prevent the drill from overheating and improve the service life of the drill.

Embodiment 2

[0020] Embodiment 2: A milling machine adopting the above method, the rotational speed of the milling head is variable during the milling process, because the milling cutter has multiple processing edges, the milling force of the milling cutter to the workpiece is pulsating, and the vibration of the workpiece Often larger, the workpiece vibrates at its own frequency, and the milling accuracy is difficult to guarantee; the use of variable speed machining can avoid the vibration of the workpiece itself, thereby improving the machining accuracy, reducing milling noise and improving the working environment.

Embodiment 3

[0021] Embodiment 3: A boring machine adopting the above method, the rotation speed of the boring tool is variable during the machining process. The variable-speed cutting tool operates alternately at two speeds. The variable speed control circuit includes a control circuit input power supply, a PLC controller connected to the input power supply and generating a control signal, and a frequency converter that can convert the control signal of the PLC controller to output different frequencies is connected to the output end of the PLC controller , the output end of the frequency converter is connected with a spindle motor whose rotational speed changes due to frequency change under the control of the frequency converter. According to the experience in actual work and the research in daily work, it is more appropriate to adjust the variable speed signal of the PLC controller to be once every 12 seconds.

[0022] The PLC controller sends out a speed change signal every 12 seconds...

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Abstract

The invention discloses a method for elevating the machine processing accuracy whose cutting speed of the cutting tool is variable during the processing course. The main shaft and the tool of the machine have different rotating speed during different time section.

Description

technical field [0001] The invention relates to a method for improving the machining accuracy of a machine tool. Background technique [0002] With the rapid development of science and technology, the requirements for product quality and performance are getting higher and higher. Improving the machining accuracy of product parts is one of the ways to solve the problem. [0003] There are many traditional methods to improve machining accuracy, such as: through small machining allowance or small feed rate, this method is at the cost of loss of production efficiency; boring instead of drilling, fine boring on the drilled hole , this method solves the problem of low drilling precision, but for boring, it is difficult to further improve the machining precision with higher processing technology. [0004] The traditional machining theory often does not consider the influence of the vibration of the workpiece itself on the machining accuracy during the machining process. The vibra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q15/08
Inventor 褚志强鞠鹏
Owner WEICHAI POWER CO LTD
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