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Numerical control machine tool cutting speed optimization method

A technology of cutting speed and optimization method, which is applied in the field of CNC machine tools to achieve the effects of easy installation, optimized cutting speed and extended tool life

Active Publication Date: 2017-12-08
FUJIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a cutting speed optimization method for CNC machine tools, which collects the current change of the spindle motor, and dynamically adjusts the frequency converter current according to the optimal cutting speed through the mapping relationship between the cutting force and the current, so that the cutting speed can be dynamically adjusted. Maintain real-time optimization, solve the problem of setting a reasonable cutting speed under different machine tools and different processing materials, prolong tool life, improve cutting efficiency and processing effect

Method used

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  • Numerical control machine tool cutting speed optimization method
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  • Numerical control machine tool cutting speed optimization method

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Embodiment Construction

[0021] A cutting speed optimization method for CNC machine tools, such as figure 1 As shown, it is a system flowchart of a cutting speed optimization method for CNC machine tools, which mainly includes the following three steps:

[0022] Step 1: Periodically collect the relevant parameters of the spindle motor of the CNC machine tool, including the drive current of the spindle motor and the power of the spindle motor; the drive current of the spindle motor is collected periodically through the Hall current sensor, and the power of the spindle motor is directly read from the inverter;

[0023] Step 2: Perform wavelet decomposition on the collected current signal to determine the interference components existing in the original current signal. Such as figure 2 Shown is the flow chart of the spindle motor current analysis and interference removal in the present invention.

[0024] Define the Morlet wavelet function sequence as

[0025] ψ a,b (t)=a -1 / 2 ψ((t-b) / a), a∈R, a>0,...

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Abstract

A numerical control machine tool cutting speed optimization method comprises a main shaft motor current period collection, main shaft motor current analysis and interference removing, main shaft motor driving current and cutting force mapping and driving current dynamic adjusting. In the invention, a main shaft motor current change condition is collected, and through a cutting force and current mapping relation, according to an optimal cutting speed, a current of a frequency converter is dynamically adjusted so that the cutting speed is dynamically maintained to be real-time optimal; a reasonable cutting speed is set under different machine tools and different processing materials; and a service life of a cutter is prolonged, and cutting efficiency and a processing effect are increased.

Description

【Technical field】 [0001] The invention belongs to the technical field of numerical control machine tools, and specifically refers to a cutting speed optimization method of numerical control machine tools. 【Background technique】 [0002] CNC machine tool is the abbreviation of Computer numerical control machine tools, which is an automatic machine tool equipped with a program control system. The control system can logically process programs with control codes or other symbolic instructions, decode them, express them in coded numbers, and input them into the numerical control device through the information carrier. After calculation and processing, various control signals are sent by the numerical control device to control the movement of the machine tool, and the parts are automatically processed according to the shape and size required by the drawing. CNC machine tools solve complex, precise, small-batch, and multi-variety parts processing problems. It is a flexible, high-e...

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Application Information

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IPC IPC(8): G05B19/416
CPCG05B19/4163G05B2219/36521
Inventor 聂明星
Owner FUJIAN UNIV OF TECH