Chisel Holder Inclined Support Curvature Stress Distribution
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Solution Overview
Problem
Existing chisel holders face challenges in efficiently transferring and distributing loads to a base part, leading to potential stress concentrations and increased risk of damage during milling operations.
Innovation Solution
The chisel holder design features a fastening shank with inclined support surface areas that form a depression-like transition area, allowing for improved load distribution and reduced stress concentrations, along with support surface areas that protrude radially to optimize adaptation to loads and simplify machinability, while maintaining precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the fastening shank has a flattened cross-sectional profile with essentially flat support surface areas, then the structure is simple to manufacture, but the load distribution is poor and stress concentrations occur
Solution Approach 1:
The support surface areas are designed with curved, arc-shaped contours instead of flat surfaces. The transition area between the support surface areas features a depression with curved geometry, creating a more favorable stress distribution pattern that reduces stress concentrations while maintaining manufacturability through standard machining operations.
Solution Approach 2:
The fastening shank exhibits varying geometric properties at different locations: the support surface areas have specific curvature radii and inclination angles optimized for load distribution, while the transition area has a depression geometry tailored for stress relief. This localized optimization of geometric properties addresses the load distribution problem without requiring complete redesign of the entire shank structure.
2Manufacturing precision
If the transition area between support surface areas is essentially flat, then the manufacturing process is simplified, but stress concentrations increase and load distribution deteriorates
Solution Approach 1:
The transition area is designed with a depression featuring curved geometry with specific radius of curvature. This curved transition area smoothly connects the support surface areas, eliminating sharp corners and stress concentration points while maintaining reasonable manufacturing complexity through standard machining operations.
3Object-affected harmful factors
If support surface areas are inclined with respect to the longitudinal axis, then transverse forces are reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The support surface areas are designed with specific inclination angles relative to the longitudinal axis of the fastening shank. By optimizing these angular parameters, the design achieves effective reduction of transverse forces while keeping the inclination angles within ranges that are manufacturable using standard machining operations.
Data Source
Figure 1~2
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AI summary
The chisel holder (10) has a plug and a bore-shaped chisel receiver having a central longitudinal axis (M). A convexly curved support surface is provided on a base part (11). The central longitudinal axis of the chisel receiver intersects the support surface. The base part is arranged in a connection area at a plug-in projection. An independent claim is also included for a lower tool part for receiving a chisel holder.