Cutter-axis vector smoothing method based on AB-type five-axis numerical control machine tool ball-end cutter machining

A tool axis vector and CNC machine tool technology, applied in the direction of digital control, program control, computer control, etc., can solve the problem of sudden change and large fluctuation of the tool axis vector on the curved surface, achieve stable and smooth motion, avoid sudden change, reduce angular velocity and angle The effect of acceleration

Active Publication Date: 2017-08-18
SHANDONG UNIV OF TECH
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Problems solved by technology

[0006] In order to overcome the problem of sudden changes and large fluctuations in the tool axis vector of the existing five-axis machining of complex curved surfaces

Method used

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  • Cutter-axis vector smoothing method based on AB-type five-axis numerical control machine tool ball-end cutter machining
  • Cutter-axis vector smoothing method based on AB-type five-axis numerical control machine tool ball-end cutter machining
  • Cutter-axis vector smoothing method based on AB-type five-axis numerical control machine tool ball-end cutter machining

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Embodiment Construction

[0043] A method for smoothing the tool axis vector based on the AB type five-axis CNC machine tool machining tool axis vector of the present invention, its basic flow 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 ball-end cutter and the design variable of the cutter position. Described step A specifically is:

[0045] (1) The relationship equation between the tool axis vector of the ball head cutter and the design variable of the cutter position in the local coordinate system

[0046] Such as figure 2 As shown, let the ball-end cutter process the complex surface S: 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, O w x w Y w Z w is the workpiece coordinate system. Let r be the radius of the ball nose cutter, O L is the origin of the local coordinate system, in with point O L and P...

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Abstract

The invention discloses a cutter-axis vector smoothing method based on AB-type five-axis numerical control machine tool ball-end cutter machining. The method comprises the following steps: establishing a relation equation between ball-end cutter cutter-axis vectors and cutter-location design variables; establishing a motion transformation equation between the ball-end cutter cutter-axis vectors and five-axis numerical control machine tool rotation shafts A and B; establishing a relation equation between the ball-end cutter cutter-location design variables and the five-axis numerical control machine tool rotation shafts A and B; determining a design variable, an objective function and constraint conditions of ball-end cutter cutter-axis vector smoothing, and establishing a cutter-axis vector smoothing mathematical model based on the AB-type five-axis numerical control machine tool ball-end cutter machining; and determining a solving method of the cutter-axis vector smoothing mathematical model. The method can prevent dramatic changes of the machine tool rotation shafts to enable the machine tool rotation shafts to be able to operate more smoothly and stably, and angular velocity and angular acceleration of the machine tool rotation shafts are greatly reduced, so that machining quality and machining efficiency of a curved surface are improved; and the method has a higher practical application value.

Description

technical field [0001] The invention relates to a method for smoothing the vector of a tool axis of a five-axis numerically controlled machine tool, in particular to a method for smoothing the vector of a tool axis based on an AB-type five-axis numerically controlled machine tool ball head cutter, and belongs to the technical field of five-axis numerically controlled machining. Background technique [0002] When using a ball-end cutter for five-axis machining of complex surfaces, due to the poor geometric properties of the surface, such as the surface's normal vector, main direction, curvature, etc., it is easy to cause sudden changes and large fluctuations in the generated ball-end 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 s...

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Application Information

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IPC IPC(8): G05B19/19G05B19/4099
CPCG05B19/19G05B19/4099G05B2219/45136
Inventor 徐汝锋周喆郭前建于珊珊贺磊陈海真
Owner SHANDONG UNIV OF TECH
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