Quick-Change Tool Holder Structure With Precise Insert Positioning
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Solution Overview
Problem
Existing tool holders with complex structures, such as cover plates and tensioning screws, make it difficult to achieve high positioning accuracy and facilitate the replacement of cutting inserts, especially when working with carbide tools.
Innovation Solution
A quick-change type tool holder structure with high positioning accuracy is achieved by using Threaded fasteners to directly connect the cutting insert and tool holder, and Limit Fitting Surfaces to ensure axial and radial positioning accuracy, eliminating the need for threading on the tool support rod.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cover plate and tensioning screw structure is used to enable quick replacement of cutting inserts, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent extracts and eliminates the cover plate from the tool holder structure, retaining only the essential tensioning screw mechanism. This simplification maintains the quick replacement functionality while reducing structural complexity. The tensioning screw directly engages with the cutting insert through a simplified interface, removing the intermediate cover plate component that added complexity without providing essential functional value.
Solution Approach 2:
The patent segments the tool holder into distinct functional components: the main body, the tensioning screw mechanism, and the cutting insert interface. This segmentation allows each component to be optimized independently, with the tensioning screw serving as a dedicated fastening element that can be quickly adjusted or replaced without affecting the entire tool holder structure.
2Ease of manufacture
If threading is applied directly to the tool support rod to connect cutting inserts, then the ease of manufacture is improved, but the reliability decreases due to difficulty of threading carbide material
Solution Approach 1:
The patent separates the threading function from the support rod by introducing a dedicated threaded component (tensioning screw). The support rod maintains its structural integrity without threads, while the tensioning screw provides the threaded connection interface. This segmentation allows threading to be applied only where necessary, on components made of suitable materials, rather than attempting to thread the carbide support rod directly.
Solution Approach 2:
The tensioning screw acts as an intermediary component between the support rod and the cutting insert. It provides the threaded connection interface without requiring threads in the carbide support rod itself. This intermediary element resolves the contradiction by enabling threaded connections through a component that can be easily threaded, while leaving the carbide support rod intact and reliable.
Data Source
AI summary
The present invention provides a quick-change type tool holder structure with high positioning accuracy, comprising a cutting insert, a tool support rod and a tool holder connected in turn, said tool support rod and tool holder having a through hole in the centre of the cutting insert and the tool holder, a Threaded Insert Fitting Holes is provided in the through hole, said Threaded Insert Fitting Holes are connected to the cutting insert and the tool holder respectively at each end of the screw, the Limit Fitting Surface are provided as a cutting hole on the internal cylinder surface of the cutting hole of the cutting support rod close to the cutting insert at the end of the cutting hole, and the said Limit Fitting Surface is connected in a matching manner with the cutting insert. The present invention has the following beneficial effect: by connecting the Limit Fitting Surface with the tool holder through the Threaded fasteners, it avoids the opening of threads on the tool support rod, and then the tool support rod can be used with the use of cemented carbide material, combined with the structure of the mating holes, which solves the technical problem of the existing tool holders with an overly complex structure, and obtains a simple structure and a high positioning accuracy of the structure of the tool support rod.