Tool measuring devices for machine tools

JP2024539438A5Pending Publication Date: 2025-10-31RENISHAW PLC
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Patent Information

Application Number
JP2024529339
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2021-11-16
Filing Date
2022-11-01
Publication Date
2025-10-31

AI Technical Summary

Technical Problem

Existing tool measuring devices for machine tools face challenges in withstanding harsh conditions due to contaminants like cutting debris and coolant fluids, with current protection mechanisms such as gas venting or shutter seals being either temporary or prone to wear and contamination, leading to reduced measurement accuracy and device degradation.

Method used

A tool measuring device equipped with a check valve, preferably a duckbill valve, integrated into the optical path to provide continuous protection against contaminants, combined with a gas exhaust opening and a shutter assembly for additional sealing, ensuring the device remains protected even without a gas supply.

Benefits of technology

The solution provides robust and compact protection against contaminants, maintaining measurement accuracy and extending the device's lifespan by preventing ingress of debris and fluids, even when gas flow is not active, with replaceable components for easy maintenance.

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Abstract

A tool measuring device for a machine tool, such as a lathe or machining center, is described. The device includes a light projecting section (100) including a light source (102) for generating a light beam (104) and a light receiving section (300) including a detector for detecting the light beam (104), the light beam passing from the light source to the detector along an optical path. At least one of the light receiving section (300) and the light projecting section (100) includes a protection device including a gas exhaust opening (108) configured to exhaust bleed gas provided from an external gas source. The optical path also passes through the gas exhaust opening (108). The protection device further includes a check valve (112; 200) arranged in the optical path. Bleed gas is provided to the gas exhaust opening (108) through the check valve (112; 200), and a flow of the bleed gas through the check valve (112; 200) causes the check valve to be in an open configuration defining a passage through which the light beam (104) can pass. In this way, increased protection against cutting debris is provided.
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