HSK Tool Holder Gap Detection for Inverted Shank Mounting
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Solution Overview
Problem
Existing machine tools lack effective methods to detect abnormal mounting of HSK shanks, which can lead to decreased machining accuracy and potential tool or workpiece damage due to the small depth difference between grooves on the HSK shank, allowing for possible inverted insertion.
Innovation Solution
A machine tool with a detection unit, such as a camera or position sensor, to acquire physical information about the gap between the HSK shank and the tooling holding portion, determining if the shank is mounted in an inverted state and executing corrective processing if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the HSK shank is designed with two grooves of different depths, then the tooling can be securely fixed to the tooling holding portion, but the small depth difference allows the HSK shank to be mounted in an inverted state
Solution Approach 1:
The patent applies asymmetry by designing the HSK shank with two grooves of different depths (first groove deeper than second groove) and providing corresponding engaging portions at different positions on the tooling holding portion. This asymmetric design enables secure fixing when mounted correctly, while simultaneously allowing detection of inverted mounting through the depth difference, thus resolving the contradiction between secure fixing and prevention of inverted mounting.
2Reliability
If no detection mechanism is provided, then the device complexity is low, but abnormal mounting cannot be detected leading to machining errors and potential damage
Solution Approach 1:
The patent replaces complex mechanical detection systems with a simpler optical detection method using a camera. The camera captures images of the gap between the tooling and tooling holding portion, and the control unit analyzes these images to detect abnormal mounting. This substitution significantly reduces device complexity while maintaining reliable detection capability.
Solution Approach 2:
The patent uses optical imaging (copying) to detect mounting status. Instead of direct mechanical contact or complex sensors, the camera creates an optical copy/image of the gap, which is then analyzed by the control unit. This copying approach simplifies the detection system while enabling reliable abnormal mounting detection.
3Measurement precision
If a camera is used to detect the gap, then visual detection of abnormal mounting is achieved, but the system requires image processing and control logic to interpret the visual data
Solution Approach 1:
The system uses the existing control unit of the machine tool to perform image processing and analysis, rather than requiring a separate dedicated processing system. The control unit acquires the captured image, processes it to detect the gap state, and determines abnormal mounting. This self-service approach leverages existing computational resources, reducing overall system complexity while maintaining high measurement precision.
Data Source
AI summary
A machine tool includes a tooling holding portion having an insertion opening for a tooling. The tooling includes a tool holding portion for holding a tool, and an HSK shank that is to be inserted into the insertion opening. The machine tool further includes a detection unit for detecting physical information indicating a state of a gap between the tooling and the tooling holding portion, and a control unit for controlling the machine tool. The control unit includes an acquisition unit for acquiring the physical information from the detection unit while the tooling is mounted to the tooling holding portion, a determining unit for determining, based on the acquired physical information, whether or not the tooling is normally mounted to the tooling holding portion, and an execution unit for executing predetermined processing if it was determined that the tooling is not normally mounted to the tooling holding portion.