Bit Holder Asymmetric Angles for High Stress Rigidity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bit holder systems face challenges in providing long-lasting and rigid bracing under high stress conditions, especially in applications requiring high machine performance and advance speeds, such as surface mining, where tool rigidity and strength are critical.
Innovation Solution
The bit holder and base part design feature supporting and bearing surfaces arranged at an obtuse angle, creating defined statically determined abutment zones for optimal force dissipation and improved rigidity, with the supporting surfaces oriented to intercept initial forces and the bearing surfaces handling increasing loads opposite to the tool feed direction, allowing for load-optimized and compact designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bit holder uses conventional supporting surfaces perpendicular to the insertion projection, then the structure is simple, but the force dissipation is insufficient and rigidity is reduced under high stress
Solution Approach 1:
The supporting surfaces are arranged at asymmetric angles (first supporting surface at angle α, second supporting surface at angle β) relative to the longitudinal axis of the insertion projection, creating an optimized force distribution pattern that enhances rigidity and strength under high stress conditions
2Strength
If the bit holder uses a compact design with fewer surfaces, then the device complexity is reduced, but the force dissipation capability is insufficient
Solution Approach 1:
The supporting surfaces are extended into three-dimensional spatial arrangement at different angles around the insertion projection, transforming a two-dimensional surface problem into a three-dimensional force distribution system that optimally dissipates forces from multiple directions
3Reliability
If the supporting surfaces are arranged parallel to the tool feed direction, then the initial forces are well intercepted, but the increasing loads opposite to the feed direction are not adequately handled
Solution Approach 1:
The bit holder design accommodates dynamic load conditions by having supporting surfaces oriented at different angles, allowing the structure to adaptively respond to changing force directions during tool engagement, from initial feeding forces to increasing opposing loads
Data Source
AI summary
The invention relates to a bit holder having an insertion projection and having a holding projection having a bit receptacle, the insertion projection comprising a bearing segment and the holding projection comprising a supporting segment. In order to allow the bit holder to be braced in permanent and stable fashion with respect to a base part, provision is made according to the present invention that the supporting segment and/or the bearing segment comprise two supporting surfaces and bearing surfaces, respectively, arranged at an angle to one another; and that the longitudinal center axis of the bit receptacle and the longitudinal axis of the insertion projection enclose an obtuse angle.