Chuck With Adjustable Spring Preload for Thread Synchronization
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Solution Overview
Problem
Existing tool mounts for thread-generating tools face challenges in synchronizing spindle advance and thread pitch, leading to synchronization errors and axial/radial stresses, particularly during rotational direction changes at maximum thread depth, which affect tool service life and thread quality.
Innovation Solution
A tool mount design featuring a base body and receptacle with axial length compensation, where the spring preload between the base body and receptacle can be individually adjusted via an accessible anchor, allowing for flexible torque transmission and length compensation, enabling improved synchronization and reduced stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If synchronization of spindle advance and thread pitch is attempted, then thread quality improves, but synchronization errors occur during rotational direction changes at maximum thread depth
Solution Approach 1:
The tool mount incorporates axial length compensation that allows dynamic adjustment during the threading process. The receptacle can move axially relative to the base body to compensate for synchronization errors that occur during rotational direction changes, while maintaining precise thread generation during normal operation.
Solution Approach 2:
The spring preload force is made adjustable through the anchor mechanism, allowing the operator to optimize the compensation characteristics for different threading operations. This enables adaptation of the system parameters to maintain both thread quality and synchronization accuracy under varying conditions.
2Device complexity
If tool mount without axial length compensation is used, then device complexity is reduced, but axial and radial stresses increase affecting tool service life
Solution Approach 1:
The tool mount incorporates axial length compensation that allows dynamic adjustment during the threading process. The receptacle can move axially relative to the base body to compensate for synchronization errors that occur during rotational direction changes, while maintaining precise thread generation during normal operation.
Solution Approach 2:
The spring preload force is made adjustable through the anchor mechanism, allowing the operator to optimize the compensation characteristics for different threading operations. This enables adaptation of the system parameters to maintain both thread quality and synchronization accuracy under varying conditions.
3Device complexity
If spring preload is fixed, then device complexity is reduced, but adaptability to different threading operations is limited
Solution Approach 1:
The anchor adjustment mechanism separates the spring preload adjustment function from the main tool mount structure. The anchor can be independently adjusted to change spring preload, allowing optimization for different threading operations without modifying the core tool mount design.
Solution Approach 2:
The adjustable anchor allows the operator to self-adjust the spring preload force for optimal performance in different threading applications, eliminating the need for complex pre-configured spring systems or professional adjustment services.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The adjustable spring preload and enhanced torque transmission capacity improve thread quality and tool service life by allowing precise synchronization of spindle advance and thread pitch, reducing errors and stress during thread generation.
Implementation Method 1
a spring arrangement (40) which exerts a spring preload force between the base body (10) and receptacle (20)
Data Source
AI summary
The invention relates to tool mount with a base body and a receptacle that is joined with the base body for torque transmission and anchored in the base body in an axially movable manner with a spring preload. The base body exhibits a shank section with a recess that is open on the machine tool side, and a bushing section that axially lengthens the shank section, with a guide borehole that is open on the tool side and separated from the recess of the shank section by a radial dividing wall. The receptacle exhibits a guide section that is guided in the guide borehole of the bushing section in an axially movable manner. The receptacle is anchored by means of an anchor that passes through an axial opening in the radial dividing wall and can be actuated for setting the spring preload via the recess of the base body.