Wear Protection Cap for Chisel Holder
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Solution Overview
Problem
Existing wear protection methods for bit holder arrangements in mining, such as welding armor plates and build-up welds, are time-consuming, costly, and prone to component failure due to uneven material wear and reduced strength at weld seams, leading to premature detachment and increased maintenance needs.
Innovation Solution
A wear protection cap designed as a cast or forged metal part with varying wall thicknesses and optimized geometries, featuring thickened transitions and rounded sections to distribute wear evenly and enhance material durability, allowing for a self-fixing connection with the bit holder arrangement and reduced abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If armor plates are welded onto the base part to protect against wear, then the service life of the base part is extended, but the weld seams become weak points that detach prematurely due to heat-affected zone degradation
Solution Approach 1:
The invention merges the base part and protection cap into a unified structure where the protection cap is designed to be replaceable but the base part itself is protected from direct wear. The protection cap absorbs the wear damage, allowing the expensive base part to remain intact and reusable, thus extending its service life without compromising weld seam integrity.
Solution Approach 2:
The protection cap is designed as a sacrificial, replaceable component that takes the place of the base part in absorbing wear damage. This disposable element protects the valuable base part, allowing frequent replacement of the cheap cap instead of the expensive base part, thereby extending the base part's service life while maintaining reliability.
2Object-affected harmful factors
If welding process is used to attach protection elements, then protection against wear is achieved, but the strength of the steel sheet is reduced in the area adjoining the weld seam due to heat effect
Solution Approach 1:
The invention segments the protection system into a base part and a separate protection cap. This segmentation allows the protection function to be isolated in the replaceable cap, preventing the base part from experiencing both wear and the detrimental heat effects of welding, thus maintaining the steel sheet's strength while still providing wear protection.
Solution Approach 2:
The protection cap acts as an intermediary element between the wear-prone environment and the base part. It mediates the wear damage, absorbing it before it can affect the base part. This intermediary approach provides wear protection without subjecting the base part to welding heat that would reduce its strength.
3Duration of action of stationary object
If multiple filigree components are handled for wear protection, then the process is time-consuming, but the service life can be extended
Solution Approach 1:
The invention merges multiple small protection elements into a single integrated protection cap. This unified structure eliminates the need to handle and attach multiple filigree components individually, significantly reducing the time and complexity of the protection process while still providing comprehensive wear protection and extending the base part's service life.
4Object-affected harmful factors
If build-up welds are applied directly to the chisel holder or base part, then effective protection against wear is achieved, but the effort involved in applying the welds is considerable
Solution Approach 1:
The protection cap serves as a pre-manufactured, replaceable wear protection element that eliminates the need for time-consuming build-up welding operations. By using this disposable cap, the system achieves effective wear protection while dramatically reducing the manufacturing effort and complexity associated with applying protective welds directly to the chisel holder or base part.
Data Source
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AI summary
The invention relates to a wear protection cap (20, 50) for a chisel holder arrangement with at least two wall sections at an angle to each other for covering surface areas of the chisel holder arrangement, wherein the wall sections are connected to each other in one piece and the wear protection caps (20, 50) are designed as a metal casting or metal forging.