Methods for controlling and / or monitoring workpiece machining processes

The method of detecting bending moments, forces, and torques with a sensor system between the tool and workpiece during machining processes addresses the challenge of controlling feed motion to prevent collisions, ensuring high throughput and quality by adjusting the feed rate before contact.

JP7886326B2Active Publication Date: 2026-07-07PRO MICRON GMBH
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Patent Information

Application Number
JP2023526293
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-11-02
Filing Date
2021-10-27
Publication Date
2026-07-07
Estimated Expiration
2041-10-27

AI Technical Summary

Technical Problem

Existing workpiece machining processes, particularly grinding, face challenges in maintaining high throughput and quality by avoiding abrupt tool-workpiece collisions that cause defects and tool damage, due to the inability to precisely control the feed motion and contact initiation.

Method used

A method involving time-resolved detection of bending moments, forces, and torques using a sensor system, with an auxiliary medium present between the tool and workpiece, allowing early intervention to adjust the feed motion and prevent collisions by detecting lateral forces and torques before actual contact.

Benefits of technology

Enhances process control to prevent collisions, ensuring high machining quality and throughput by reducing unproductive time and minimizing defects, while maintaining precise control over the feed motion.

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Abstract

A method for controlling and / or monitoring a workpiece machining process is disclosed. During the workpiece machining process, a tool is brought into contact with the workpiece surface to be machined with its working surface. To this end, a feed-in movement is performed for relative approach of the tool to the workpiece. During the machining process, the tool and / or the workpiece rotate about the tool axis and / or the workpiece axis. The feed-in movement is performed while the tool and / or the workpiece rotate. During the feed-in movement, an auxiliary medium is injected into at least the region between the working surface of the tool and the workpiece surface to be machined. During the feed-in movement, time-resolved detection of bending moments and / or forces acting transversely, in particular perpendicularly, to the tool axis and / or transversely, in particular perpendicularly, to the workpiece axis and / or torques occurring during rotation of the tool about the tool axis and / or rotation of the workpiece about the workpiece axis is performed. From the values ​​and / or time courses of the detected bending moments, forces and / or torques, the state of the approaching process is inferred.
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Citation Information

Patent Citations

  • Controlling method of grinding technology and method of determining work piece grinding lower limit position

    CN109202720A

  • Workpiece fine processing method, involves controlling feed of rotation tool depending on starting position of blades in processing phase after starting phase, where starting position is detected with impact sound sensor

    DE102007063200A1

  • DE141000A

  • Chuck-integrated force measurement system

    EP2103379A1

  • Method for setting up and / or monitoring operating parameters of a workpiece processing machine

    EP2924526A1