Method for capturing tool path and device thereof

Patent metadata

Field	Value
Publication number	US-11511380-B2
Application number	US-201916727008-A
Country	US
Kind code	B2
Filing date	Dec 26, 2019
Priority date	Dec 10, 2019
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A method for capturing a tool path, applicable to a machine tool having a controller and furnished with a tooling, includes the steps of: obtaining a data update frequency of the controller; calculating a feed rate of the controller, determining whether or not the feed rate is obtained, going to next step if positive, and going to the previous step if negative; reading G-codes of the controller to confirm the feed rate; and, based on the confirmed feed rate, recording machine coordinates transmitted from the controller for synthesizing a tool path file. The tool path file is used for simulation and analysis of machining of the machine tool. In addition, a device for capturing the tool path is also provided.

First claim

What is claimed is:

1. A method for capturing a tool path, applicable to a machine tool having a controller and furnished with a tooling, comprising the steps of:
(a) obtaining a data update frequency of the controller;
(b) calculating a feed rate of the controller, determining whether or not the feed rate is obtained, going to step (c) if positive, and going to the step (a) if negative;
(c) reading G-codes of the controller to confirm the feed rate; and
(d) based on the confirmed feed rate, recording machine coordinates transmitted from the controller for synthesizing a tool path file.

2. The method for capturing a tool path of claim 1 , further including the following steps between the step (c) and the step (d):
(c1) determining whether or not the feed rate is equal to a setting value, going to step (c2) if negative, and going to the step (d) if positive; and
(c2) setting an overwrite value to adjust the confirmed feed rate.

3. The method for capturing a tool path of claim 2 , wherein the overwrite value is a percentage.

4. The method for capturing a tool path of claim 1 , wherein the step (b) includes the steps of:
(b1) transmitting a move instruction to the machine tool;
(b2) the machine tool performing the move instruction;
(b3) reading the machine coordinates, and recording corresponding current times;
(b4) determining whether or not the machine coordinates are varied, going to step (b5) if positive, and going back to step (b3) if negative;
(b5) updating the machine coordinates and the current times;
(b6) determining whether or not the move instruction is already performed, going to step (b7) if positive, and going back to the step (b3) if negative; and
(b7) based on a difference between a real path and an ideal path, calculating the feed rate.

5. The method for capturing a tool path of claim 4 , wherein, in the step (b1), a test program is transmitted to the controller, and the test program includes the move instruction.

6. The method for capturing a tool path of claim 1 , wherein the feed rate includes a linear-path feed rate and a curve-path feed rate.

7. A device for capturing a tool path, coupled electrically with a controller of a machine tool, comprising:
a communication-frequency analysis unit, used for obtaining a data update frequency of the controller, and for calculating a suitable feed rate of the controller;
a cutting-speed control unit, used for evaluating a feed rate and G-codes of the controller to confirm the feed rate; and
a tool-path capture unit, used for evaluating the confirmed feed rate to receive machine coordinates transmitted from the controller for synthesizing a tool path file.

Assignees

• Ind Tech Res Inst

Inventors

• Chang Yu-Ling
• Hsu Chih-Yuan
• Wang guo-wei
• Tseng Yu-An
• Chang Yung-Sheng
• Yang Bei-Hua
• Li Chia-Chun
• Liang Shuo-Peng

Classifications

• G06F2113/10

  Additive manufacturing, e.g. three-dimensional [3D] printing · CPC title

• B29C64/393

  for controlling or regulating additive manufacturing processes · CPC title

• G05B2219/35349

  Display part, programmed locus and tool path, traject, dynamic locus · CPC title

• G05B19/25

  for continuous-path control · CPC title

• G05B19/4163

  Adaptive control of feed or cutting velocity (without NC B23Q15/12) · CPC title