Plasma Cutting Robot Arc Start Height Control for Shorter Takt Time
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Solution Overview
Problem
Existing plasma cutting robot control devices require the torch to move to the cutting height first and then to the pierce height, resulting in a longer takt time.
Innovation Solution
A robot control device with a teaching-playback type system that includes a program reading unit, a program interpreting unit, and a program executing unit, which sets the arc start height using position information from a move instruction generated after the plasma cutting start instruction, allowing for appropriate movement of the plasma cutting robot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the torch moves to the cutting height first and then to the pierce height using the cutting height as a reference, then the path to reach the cutting height is clearly defined, but the takt time becomes long
Solution Approach 1:
The patent applies preliminary action by setting the arc start height (pierce height) using position information from the move instruction generated after the plasma cutting start instruction. This allows the torch to move directly to the pierce height without first moving to the cutting height, eliminating the intermediate step and reducing the overall operation time.
2Ease of operation
If only the path to the cutting height is taught, then the teaching program is simple, but the torch has to move to the cutting height first and then to the pierce height
Solution Approach 1:
The system uses the position information from the move instruction (which is already generated for cutting height) to automatically set the arc start height. This self-service approach eliminates the need for separate teaching of the pierce height path while still achieving direct movement to the correct height, maintaining teaching simplicity while reducing movement time.
Data Source
AI summary
Provided is a robot control device and a plasma cutting method that can shorten a takt time using a teaching program that appropriately moves a plasma cutting robot. The robot control device includes: a program reading unit that reads a teaching program to operate the plasma cutting robot; a program interpreting unit that interprets the teaching program which has been read; and a program executing unit that executes the teaching program that has been interpreted. In a case where the program interpreting unit interpreted an arc start instruction for plasma cutting in the teaching program, the program interpreting unit sets an arc start height of a torch in the plasma cutting robot included in the arc start instruction, using position information of the plasma cutting robot included in a move instruction generated after the arc start instruction.