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Numerical control machine tool and its control method and device for adaptive machining

A technology of numerical control machine tools and control methods, applied in digital control, program control, electrical program control, etc., can solve the problem that the feed rate cannot maintain the cutting state, and achieve the effect of improving efficiency and precision

Active Publication Date: 2021-09-07
TSINGHUA UNIV
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  • Abstract
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Problems solved by technology

The cutting force, cutting allowance and tool wear are constantly changing, and the programmed feed rate cannot maintain the optimal cutting state

Method used

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  • Numerical control machine tool and its control method and device for adaptive machining
  • Numerical control machine tool and its control method and device for adaptive machining
  • Numerical control machine tool and its control method and device for adaptive machining

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Embodiment Construction

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0025] Complex parts, especially blade parts, are important components in aerospace and other industries. They have complex curved surfaces, numerous parameters, and complex processing and manufacturing. Its processing rigidity is low and it is easy to deform, and the accuracy of shape tolerance is high. The materials are mainly titanium alloys, high-temperature alloys and other difficult-to-machine materials, which makes it difficult to process parts. Therefore, how to reduce machining deformation and control precision in the ma...

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Abstract

The present invention proposes a CNC machine tool and a control method and device for adaptive processing thereof, wherein the method includes: acquiring a monitoring signal of the CNC machine tool, wherein the monitoring signal includes a spindle current signal, a spindle speed signal and a feed speed signal; According to the monitoring signal, it is determined that the CNC machine tool is in the cutting processing state; when the CNC machine tool is in the cutting processing state, an effective cutting current is obtained; using the effective cutting current, the theoretical identification cutting of the CNC machine tool at the current moment is obtained force; identify the cutting force according to the theory, and use the reinforcement learning model to obtain the predicted cutting force; control the CNC machine tool to process parts according to the predicted cutting force, and independently find the optimal cutting feed rate target by predicting the cutting force, so as to realize CNC machine tools are adaptively machined according to predicted cutting forces.

Description

technical field [0001] The invention relates to the technical field of numerical control machine tool processing monitoring and control, in particular to a control method and device for a numerical control machine tool and adaptive processing thereof. Background technique [0002] With the development of intelligent manufacturing technology, intelligent adaptive processing of CNC machine tools for complex parts is becoming more and more important. In ordinary NC machining of components, the machine tool is processed at a constant speed at the feed rate preset by the NC (Numerical Control, digital control) program, but the actual cutting process is complex dynamic cutting with nonlinearity, time variation, severe random interference, and strong uncertainty process. Cutting force, cutting allowance and tool wear are constantly changing, and the programmed feed rate cannot maintain the optimal cutting state. The indirect monitoring method of cutting force identification based...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/35349
Inventor 张建富高鹏王骁冯平法郁鼎文吴志军
Owner TSINGHUA UNIV
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