Numerically-controlled machine tool feed system speed regulation method based on power prediction

A CNC machine tool and power prediction technology, which is applied to the accessories of tool holders, metal processing equipment, turning equipment, etc., can solve the problems of poor real-time performance, long response time of the speed regulation process of the machine tool feed system, and low efficiency of the roughing process.

Inactive Publication Date: 2016-09-21
CHONGQING UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a speed regulation method for the feed system of a CNC machine tool based on power prediction, which is aimed at the low efficiency of the roughing process under the condition of constant low-speed feed speed processing, and the response time of the speed regulation process of the machine tool feed system is relatively short. Long, poor real-time performance

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  • Numerically-controlled machine tool feed system speed regulation method based on power prediction
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  • Numerically-controlled machine tool feed system speed regulation method based on power prediction

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Embodiment

[0060] In this embodiment, the feasibility of the proposed feed speed control method is verified by a method combining experiment and simulation. When formulating the verification scheme, because the control interface of the CNC machine tool used in the experiment could not be obtained, the verification process was divided into two parts. First, the feasibility of the power prediction method is verified by testing the cutting process of the CNC machine tool; then, the static simulation analysis of the feed speed control is carried out with the measured power value as the data source.

[0061] (1) Power prediction test

[0062] The Z-axis feed system of a CNC lathe (C2-6136HK / 1) was used for the test. The basic parameters of the feed system of the machine tool are shown in Table 1, and the test conditions are shown in Table 2.

[0063] Table 1 Power related parameters (Z axis) of feed system of CNC lathe C26136HK / 1

[0064]

[0065] Table 2 Test conditions of feed system o...

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Abstract

The invention relates to a numerically-controlled machine tool feed system speed regulation method based on power prediction. During a rough turning process of a numerically-controlled machine tool, the minimum feed speed is generally set according to the maximum cutting depth, and machining is performed by taking the minimum feed speed as a constant feed speed. However, the problem of low efficiency caused by constant-speed machining is especially acute in case of a large amount of rough turning operation and a large machining batch. Aiming at the problem, the invention provides the numerically-controlled machine tool feed system speed regulation method based on power prediction. The method comprises the following steps: Step 1, acquiring power signals and inputting the power signals to a neural network to predict a power value of next moment; Step 2, calculating a deviation ratio of preset power and predicted power to judge whether speed regulation is needed; and Step 3, predicting a back cutting depth, and finishing speed regulation control over a feed system through combination of the back cutting depth and a preset power value. The method effectively solves the problem of lagging of speed regulation under different cutting conditions, reduces the machining cost and greatly improves the utilization rate and cutting efficiency of the machine tool.

Description

technical field [0001] The invention is suitable for use in the field of numerical control machine tool processing, and specifically relates to a speed regulation method for a feed system of a numerical control machine tool based on power prediction. Background technique [0002] Rough turning is a process of simple processing or primary processing of blanks. Its main purpose is to cut off the blank allowance and make the blank into approximate parts. Rough turning does not have high requirements on the quality of the processed surface, and the processing efficiency is the focus of attention. Therefore, in rough machining, the feed rate and depth of cut are generally set as large as possible, so as to remove as many chips as possible in the shortest possible time. For ordinary machine tools, rough turning is mainly done by the operator based on the work process and experience. However, for CNC machine tools, the machining process and process parameters work according to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B25/06
CPCB23B25/06Y02P70/10
Inventor 谷振宇金迪文马铁东白晓辉
Owner CHONGQING UNIV
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