Tool Chuck Holder Mechanism for Collet Axis Alignment
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Solution Overview
Problem
Conventional tool chucks face misalignment issues due to manual screwing operations, leading to potential axis misalignment between the collet and the chuck body, which can result in improper gripping of the tool shank during high-speed machining.
Innovation Solution
A tool chuck design featuring a movable holder and nut arrangement, with a movement allowing mechanism that ensures precise alignment of the collet axis with the chuck body axis, utilizing a holder with first and second holder members and an engaging mechanism to facilitate axial movement and correct axis alignment during tool mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual screwing operation is used to push the collet into the chuck body, then the tool chuck structure is simple, but axis misalignment occurs between the collet and the chuck body
Solution Approach 1:
A holder is introduced as an intermediary component between the collet and the chuck body. The holder includes a holder body that receives the collet and a movement allowing mechanism that enables the holder to move relative to the chuck body during the pushing operation, thereby preventing direct transmission of misalignment forces from manual screwing to the collet-axis interface
Solution Approach 2:
The holder is designed with dynamic movement capability through the movement allowing mechanism, which permits the holder to adjust its position relative to the chuck body during the tool mounting process. This dynamic adjustment compensates for misalignment issues that would otherwise occur with static manual screwing operations
2Force
If the collet is pressed firmly into the chuck body during mounting, then the tool gripping force is strong, but axis misalignment is locked in and cannot be corrected
Solution Approach 1:
The movement allowing mechanism enables preliminary alignment adjustments to be made before the collet is firmly pressed into the chuck body. The holder can move to correct axis alignment during the initial stages of the pushing operation, and only after proper alignment is achieved does the collet become firmly secured
Solution Approach 2:
The holder transitions from a movable state during alignment correction to a fixed state during final securing. The movement allowing mechanism permits dynamic adjustment during the mounting process, then locks the holder in position once proper alignment is achieved, ensuring both alignment accuracy and firm gripping force
Data Source
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AI summary
Provided is a tool chuck that allows precision gripping of a tool by a collet when this collet is pushed into a chuck body. The tool chuck includes a collet (4) for gripping a tool (5), a chuck body (2) having, at a leading end thereof, a receiving portion (25) for receiving the collet (4) inserted therein along an axis (AX) thereof, a holder (3) containing the collet (4) therein and configured to be movable together with the collet (4) along an axial direction (X) based on the axis (AX), and a nut (N) fitted on the chuck body (2) in a radial direction (R) based the axis (AX) and containing the holder (3) in the radial direction (R). The holder (3) has a movement allowing mechanism (9) for allowing the holder (3) to move relative to the nut (N) along the axial direction (X) when the nut (N) is moved relative to the chuck body (2) along the axial direction (X).