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Circular cutter processing cutter-axis vector smoothing method based on AB type five-axis CNC machine tool

A technology of tool axis vector and CNC machine tools, which is applied to five-axis CNC machine tool axis vector smoothing. Based on the field of tool axis vector smoothing of AB five-axis CNC machine tool ring tool processing, it can solve the sudden change and large fluctuation of the tool axis vector on curved surfaces. and other problems, to achieve the effect of smooth and smooth movement, avoid sudden changes, and avoid smoothness

Active Publication Date: 2017-07-14
SHANDONG UNIV OF TECH
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Problems solved by technology

[0006] In order to overcome the problem of abrupt change and large fluctuations in the tool axis vector of the existing five-axis machining of the complex curved surface with the circular knife, the present invention provides a smoothing method of the tool axis vector based on the AB type five-axis CNC machine tool for the machining of the circular knife

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  • Circular cutter processing cutter-axis vector smoothing method based on AB type five-axis CNC machine tool
  • Circular cutter processing cutter-axis vector smoothing method based on AB type five-axis CNC machine tool
  • Circular cutter processing cutter-axis vector smoothing method based on AB type five-axis CNC machine tool

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Embodiment Construction

[0043] According to the present invention, a method based on AB type five-axis CNC machine tool machining tool axis vector smoothing method, its basic process is as follows figure 1 As shown, preferred specific implementation methods include:

[0044] Step A, establishing the relational equation between the tool axis vector of the annular cutter and the design variable of the cutter position. Described step A specifically is:

[0045] (1) The relationship equation between the circular tool axis vector and the tool position design variables in the local coordinate system

[0046] Such as figure 1 As shown, assume that the circular cutter processes the surface S of the workpiece, r(u,v), P cc (u cc ,v cc ) is any point on the surface, n cc is the unit normal vector of the point. Let r be the truncated circle radius of the ring knife, O L is the origin of the local coordinate system, then in point O L and P cc Corresponding radial vector. At the same time, with poi...

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Abstract

The present invention discloses a circular cutter processing cutter-axis vector smoothing method based on an AB type five-axis CNC machine tool. The method comprises the following steps: establishing a relation equation between a circular cutter cutter-axis vector and a cutter spacing design vector; establishing a motion conversion equation between the circular cutter cutter-axis vector and the five-axis CNC machine tool revolving axles A and B; establishing a relation equation between the circular cutter cutter-spacing design vector and the five-axis CNC machine tool revolving axles A and B; determining the design variable, the target function and the constraint condition of the circular cutter processing cutter-axis vector smoothing, and establishing a circular cutter processing cutter-axis vector smoothing mathematical model based on the AB type five-axis CNC machine tool; and determining the solution method of the above cutter-axis vector smoothing mathematical model. The circular cutter processing cutter-axis vector smoothing method based on the AB type five-axis CNC machine tool can avoid the rapid changing of the machine tool revolving axles, allow the machine tool revolving axles to perform more stable and smooth motion, greatly reduce the angular velocity and the angular acceleration of the machine tool revolving axles so as to improve the processing quality and the processing efficiency of the curved surface and have a high practical application value.

Description

technical field [0001] The invention relates to a tool axis vector smoothing method of a five-axis numerical control machine tool, in particular to a tool axis vector smoothing method based on an AB-type five-axis numerical control machine tool for circular knife processing, and belongs to the technical field of five-axis numerical control machining. Background technique [0002] When using a ring cutter to process complex surfaces in five axes, due to the poor geometric properties of the surface, such as the surface normal vector, main direction, curvature, etc., it is easy to cause sudden changes and large fluctuations in the generated ring cutter tool axis vector. Even if the simplest tool positioning method (such as the Sturz method) is used to process the above-mentioned curved surface area five-axis, it will cause a drastic change in the tool axis vector, which will affect the stability of the five-axis machine tool motion, the servo capability and increase of the feed ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/35349
Inventor 徐汝锋程祥郑光明孟建兵
Owner SHANDONG UNIV OF TECH
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