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Off-line planning method for cutting feed rate of five-shaft numerical control side milling machining

A feed rate, off-line technology, applied in metal processing equipment, milling machine equipment, manufacturing tools, etc.

Inactive Publication Date: 2009-08-05
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

This patent proposes a feed rate optimization method that considers cutting force constraints, but this method is aimed at three-axis milling and is optimized for linear interpolation.

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  • Off-line planning method for cutting feed rate of five-shaft numerical control side milling machining
  • Off-line planning method for cutting feed rate of five-shaft numerical control side milling machining
  • Off-line planning method for cutting feed rate of five-shaft numerical control side milling machining

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Embodiment Construction

[0031] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The following examples are not intended to limit the present invention.

[0032] The process flow of the five-axis CNC side milling feed rate off-line planning method proposed by the present invention is as follows figure 1 shown.

[0033] Firstly, the discrete tool position file corresponding to the design surface is reversed by machine kinematics to obtain the discrete position sequence of each axis of the machine tool; each axis follows the cubic spline polynomial interpolation format, and the adjacent position points of each axis are initially set at equal time intervals The running time between each axis; the establishment takes the running time sequence between the adjacent position points of each axis as the design variable, takes the minimum sum of the running time sequence between the adjacent position points ...

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Abstract

The invention relates to a 5-axis NC flank milling machining feed rate off-line planning method, which carries out 5-axis NC flank milling machining feed rate off-line planning on the basis of various axis cubic spline polynomial interpolation. By establishing an optimizing model which takes time sequences between adjacent position points of various axes as design variables, takes the minimum sum of running time sequences between adjacent position points of various axes as an objective function, takes limits of speeds, accelerations and jerks of various axes of a machine tool as restriction, and simultaneously takes the maximum cutting force in the cutting process of a tool is smaller than a threshold value as restriction, the method adopts global optimization algorithm to solve and obtain the optimal feed rate. The method is suitable for free-form surface rough machining and ruled surface or similar ruled surface semifinishing.

Description

technical field [0001] The invention relates to an off-line planning method of feed rate for five-axis numerical control side milling, which can be used for rough machining of free-form surfaces and semi-finishing of ruled surfaces or quasi-ruled surfaces, and belongs to the technical field of Computer Aided Manufacturing (CAM) . Background technique [0002] In the field of mechanical manufacturing, five-axis CNC milling machines are widely used in the processing of complex curved surface parts such as molds, impellers, propellers, and turbine blades. According to the different ways of removing material by the tool, the five-axis CNC milling process is mainly divided into two types: point milling and flank milling. Compared with the former, the latter uses the side edge along the tool axis for multi-point machining, which can efficiently obtain a higher-quality machined surface. Feed rate is the main factor that determines machining efficiency. Therefore, the method of s...

Claims

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Application Information

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IPC IPC(8): B23C3/00
Inventor 丁汉丁烨朱利民朱向阳王宇晗
Owner SHANGHAI JIAO TONG UNIV
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