Processing cutter shaft vector fairing method of annular cutter based on BC type five-axis numerical control machine tool

A tool axis vector and CNC machine tool technology, which is applied to five-axis CNC machine tool axis vector smoothing, based on the field of BC five-axis CNC machine tool ring tool processing tool axis vector smoothing, 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 change, improve processing quality and processing efficiency

Active Publication Date: 2017-07-07
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 complex curved su...

Method used

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  • Processing cutter shaft vector fairing method of annular cutter based on BC type five-axis numerical control machine tool
  • Processing cutter shaft vector fairing method of annular cutter based on BC type five-axis numerical control machine tool
  • Processing cutter shaft vector fairing method of annular cutter based on BC type five-axis numerical control machine tool

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Embodiment Construction

[0044] The present invention is based on a BC-type five-axis CNC machine tool circular knife machining tool axis vector smoothing method, its basic flow is as follows figure 1 As shown, preferred specific implementation methods include:

[0045] 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:

[0046] (1) The relationship equation between the circular tool axis vector and the tool position design variables in the local coordinate system

[0047] 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 point P ...

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Abstract

The invention discloses a processing cutter shaft vector fairing method of an annular cutter based on a BC type five-axis numerical control machine tool. The method comprises the following steps that a relation equation between a cutter shaft vector and a cutter position design variable of the annular cutter is established; a movement transformation equation between the cutter shaft vector of the annular cutter and the rotation axes B and C of the five-axis numerical control machine tool is established; a relation equation between the cutter position design variable of the annular cutter and the rotation axes B and C of the five-axis numerical control machine tool is established; a design vector, an objective function and a constraint condition of cutter shaft vector faring of the annular cutter are determined, and a mathematical model of processing cutter shaft vector fairing of the annular cutter based on the BC type five-axis numerical control machine tool is established; and a solving method of the mathematical model of utter shaft vector fairing is determined. The method can avoid rapid change of the rotation axes of the machine tool, rotation-axis movement of the machine tool is more stable and smoother, the angular velocity and angular acceleration of the rotation axes of the machine tool are reduced greatly, the curved surface processing quality and efficiency are improved, and the practical application value is higher.

Description

technical field [0001] The invention relates to a method for smoothing the tool axis vector of a five-axis numerical control machine tool, in particular to a method for smoothing the tool axis vector of a circular knife based on a BC type five-axis numerical control machine tool, 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 ...

Claims

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Application Information

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IPC IPC(8): G05B19/4099
CPCG05B19/4099G05B2219/45136
Inventor 徐汝锋郑光明程祥李勋
Owner SHANDONG UNIV OF TECH
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