Tool Holder Wedge Protection Element Anti-Twist
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Solution Overview
Problem
Existing tool holders require complex and laborious clamping processes, with high production effort for thread elements, and are time-consuming to assemble, especially when dealing with tools featuring a lateral drive flat like Weldon surfaces.
Innovation Solution
A tool holder design featuring a movable, wedge-shaped protection element that self-locks with the tool and collet, providing pull-out and anti-twist protection, which simplifies assembly and manufacturing by eliminating the need for separate clamping means and complex thread elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clamping wedge with spiral ribs and helical groove is used to clamp the tool shank, then the tool can be securely clamped, but the clamping process becomes laborious and time-consuming requiring multiple assembly steps and screw bolts
Solution Approach 1:
The invention extracts and eliminates the complex spiral ribs and helical groove thread elements from the clamping wedge and collet, replacing them with a simplified design that achieves secure clamping without these time-consuming manufacturing features
Solution Approach 2:
The protection element is divided into a wedge-shaped body with distinct force transmission surfaces, separating the clamping function from the pull-out protection function, allowing each to be optimized independently for speed and reliability
2Reliability
If spiral ribs and helical grooves are provided on the clamping wedge and collet, then the tool can be clamped securely, but the manufacturing complexity and production effort increase significantly
Solution Approach 1:
The invention removes the complex spiral ribs and helical groove features from the design, extracting only the essential clamping function and implementing it through simpler geometric forms that are much easier to manufacture
Solution Approach 2:
Instead of creating complex thread elements to achieve clamping, the invention inverts the approach by using simple wedge shapes and force transmission surfaces that naturally generate the necessary clamping forces through geometry alone
3Reliability
If a self-locking bolt with Weldon surface is used for anti-twist protection, then the tool can be protected against twisting, but the assembly becomes more complex requiring separate clamping and protection mechanisms
Solution Approach 1:
The invention merges the clamping wedge and pull-out protection into a single integrated protection element that performs both functions simultaneously, eliminating the need for separate clamping and anti-twist mechanisms
Solution Approach 2:
The protection element is designed as a multi-functional component that provides both clamping force transmission and pull-out protection, as well as anti-twist protection through its wedge shape and force transmission surfaces, replacing multiple specialized components
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 tool holder enables quick and easy clamping of tools with high concentric running precision and vibration damping, while providing reliable protection against pull-out and twisting, reducing assembly time and production complexity.
Implementation Method 1
The protection element is mounted so as to be moveable relative to the collet and has a wedge-shaped configuration as well as force-transmission surface
Implementation Method 2
When the protection element is in a radially inner engaged position with the tool, the protection element is configured to be clamped to the cool and the collet so as to be self locking
Data Source
AI summary
A tool holder includes a collet configured to be clamped to the shank of a tool and a pull-out protection element configured to secure the tool against being pulled out of the collet. The pull-out protection further includes a protection element such that pull-out forces acting on the tool are transmitted to the collet. The protection element is mounted so as to be moveable relative to the collet and has a wedge-shaped configuration as well as force-transmission surface. When the protection element is in a radially inner engaged position with the tool, the protection element is configured to be clamped to the cool and the collet so as to be self locking.