Tool-Gripping Member Groove Structure for Magazine Impact Protection
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Solution Overview
Problem
Existing machine tools are susceptible to damage of the tool magazine during tool replacement when the spindle moves to an unexpected position, causing excessive load on the tool magazine.
Innovation Solution
The tool-gripping member, which includes a base stand with a groove section thinner than the rest, concentrates the load on this section during unexpected spindle movements, thereby redirecting the load away from the tool magazine and onto the grip arm, which is designed to absorb the impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the tool-gripping member is designed with high strength against loads in the up-down direction, then the tool-gripping member can withstand normal operational loads, but the tool magazine becomes vulnerable to damage when the spindle moves to an unexpected position causing excessive load
Solution Approach 1:
The engaging section is designed with non-uniform thickness, featuring a thinner groove section and thicker other sections. This local variation in structural properties allows the groove section to yield first under excessive load, protecting the tool magazine while maintaining overall structural integrity during normal operation.
Solution Approach 2:
The groove section is designed as a sacrificial element that can be damaged instead of the more expensive tool magazine. By making this specific section thinner and more vulnerable, the system allows controlled damage to a replaceable component rather than the main tool magazine assembly.
2Device complexity
If the engaging section is made uniformly thick, then the structure is simple and strong, but excessive load cannot be safely redirected
Solution Approach 1:
The engaging section incorporates a groove section with reduced thickness compared to other sections. This local structural variation creates a predetermined weak point that concentrates excessive loads in a controlled manner, preventing uncontrolled damage to the tool magazine while maintaining overall structural simplicity.
Data Source
AI summary
Provided are a tool-gripping member, a tool magazine, and a machine tool. This tool-gripping member is provided to the tool magazine and grips a tool holder that supports a tool. A stand is fixed to a magazine base of the tool magazine and includes an engaging section with which the tool holder engages. A pair of claw members move pivotally around fulcrums provided to the stand, and sandwich and grip the tool holder while the tool holder is being engaged with the engaging section. The engaging section of the stand includes groove sections extending in a direction perpendicular to the left-right direction in which the pair of claw members face each other and the axial direction of the fulcrums.