Cutting tool controller and method of controlling the same

Patent metadata

Field	Value
Publication number	US-9772618-B2
Application number	US-201414584007-A
Country	US
Kind code	B2
Filing date	Dec 29, 2014
Priority date	Nov 6, 2014
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

A cutting tool controller and method of controlling are provided. The method includes providing a swing angle for the cutting tool, obtaining a swing vector of the cutting tool through kinematics calculation according to the swing angle, using the swing vector of the cutting tool to calculate a set of possible solutions of a swaying angle of the cutting tool, selecting a possible solution satisfying an operation condition of the machine from the set of possible solutions, using the selected possible solution to calculate an offset of positions of the cutting tool before and after swaying, so as to generate a compensation vector, calculating required compensation values for three axes of the machine according to the compensation vector, and outputting a control command including the compensation values, such that the cutting tool of the machine or a working table for placing the workpiece thereon of the machine moves correspondingly.

First claim

The invention claimed is:

1. A method of controlling a cutting tool, which controls a position relation between the cutting tool of a machine and a workpiece, comprising:
providing a swing angle for the cutting tool;
obtaining a swing vector of the cutting tool through kinematics calculation according to the swing angle;
using the swing vector of the cutting tool to calculate a set of possible solutions of a swaying angle of the cutting tool;
selecting a possible solution satisfying an operation condition of the machine from the set of possible solutions;
using the selected possible solution to calculate an offset of positions of the cutting tool before and after swaying, so as to generate a compensation vector;
calculating required compensation values for three axes of the machine according to the compensation vector; and
outputting a control command including the compensation values, such that the cutting tool of the machine or a working table for placing the workpiece thereon of the machine moves correspondingly.

2. The method of claim 1 , wherein the machine comprises three linear axes and two rotational axes.

3. The method of claim 1 , wherein the swaying angle comprise a tilting angle and a rotational axis angle of the cutting tool of the machine.

4. The method of claim 1 , wherein the swing angle is an angle between an original vertical plane of the cutting tool before swaying and a plane of the cutting tool after swaying.

5. The method of claim 4 , wherein the set of possible solutions indicates that the cutting tool uses a positive or negative swaying angle with respect to the original vertical plane to achieve an identical cutting objective.

6. The method of claim 1 , wherein a configuration of the machine comprises a 3+2 axes machine configuration, a 4+1 axes machine configuration, or a dual-axes machine configuration.

7. The method of claim 1 , wherein the step of that the cutting tool of the machine or the working table for placing the workpiece thereon of the machine moves correspondingly refers to move a relative position between the cutting tool and the workpiece, such that the cutting tool performs cutting with an original cutting path.

8. A cutting tool controller performing the method of claim 1 .

9. A cutting tool controller, providing an adjustment of a position relation between a cutting tool of a machine and a workpiece, the cutting tool controller comprising:
a compiling unit compiling machining parameters of a cutting path to be performed, so as to generate a swing angle;
a kinematics calculation unit calculating a swing vector of the cutting tool according to the swing angle;
a compensation unit calculating an offset of positions of the cutting tool before and after swaying, so as to generate a compensation vector; and
a dynamic control unit calculating required compensation values for three axes of the machine according to the compensation vector, so as to generate a corresponding control command corresponding to the compensation values.

10. The cutting tool controller of claim 9 , further comprising an input module inputting the machining parameters and controller parameters.

11. The cutting tool controller of claim 9 , further comprising an outputting module sending the control command to a driver of the machine to control the cutting tool or a working table to move.

Assignees

• Ind Tech Res Inst

Inventors

• Hsu Che-Wei
• Lee Chien-Yi
• Lin Yi-Ying
• Shiu Shih-Je
• Kao Yung-Ming

Classifications

• B27C5/02

  Machines with table · CPC title

• G05B19/19 Primary

  characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path · CPC title

• G05B2219/50049

  Control machine as function of position, angle of workpiece · CPC title

• B23Q17/2457

  of tools · CPC title

• G05B19/404

  characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia (G05B19/19, G05B19/41 take precedence) · CPC title