Milling Drum Filling Elements for Weld Seam Load Relief
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Solution Overview
Problem
Existing milling drums experience damage to the weld seams connecting filling elements and toolholders due to high loads, leading to reduced load-bearing capacity and performance.
Innovation Solution
Integrally forming protrusions on the filling elements that project radially outward and are welded to adjacent bottom parts, providing elasticity and distributing stress to prevent weld seam failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If filling elements are welded directly to bottom parts to form clearing and conveyor screws, then the milling drum can convey removed ground material, but the weld seams are damaged under high loads reducing load-bearing capacity
Solution Approach 1:
The filling element is segmented into a base body and an integrally formed protrusion. The protrusion serves as a dedicated welding interface that is welded to the bottom part, while the base body forms the conveying screw. This segmentation allows the welding stress to be concentrated on the protrusion rather than the entire filling element, protecting the main structural integrity.
Solution Approach 2:
The protrusion is integrally formed on the base body before assembly, creating a pre-prepared welding surface that is specifically designed to accommodate the welding process. This preliminary formation of the welding interface ensures that the welding stress is directed to a predetermined area, preventing unexpected stress concentration points.
2Stability of the object's composition
If filling elements are made rigid to maintain structural stability, then the clearing and conveyor screw maintains its shape, but the weld seams fail under extreme loads
Solution Approach 1:
By dividing the filling element into the base body and the protrusion, the patent creates a distinct welding zone. The base body maintains the rigid structural shape needed for conveying, while the protrusion serves as a sacrificial or stress-absorbing welding interface that protects the main structure from weld seam failure.
Solution Approach 2:
The protrusion is designed with specific local properties at its welding surface, creating a localized area optimized for welding attachment. This local quality enhancement at the protrusion base allows the weld to be stronger and more reliable without compromising the overall structural stability of the base body.
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
Enhances the load-bearing capacity and performance of the milling drum by relieving stress on weld seams, preventing damage and ensuring durability under extreme loads.
Implementation Method 1
the protrusion is welded to the rear end of the front bottom part in the circumferential direction or to the front end of the rear bottom part in the feed direction
Data Source
AI summary
A milling drum includes a milling drum rotor. Bottom parts of tool systems are attached to the surface of the milling drum rotor. At least a subset of the bottom parts are spaced apart from one another in the circumferential direction. Filling elements are disposed in the spacer area between at least some of the adjacent bottom parts, which filling elements are each welded to the bottom part disposed in front of and behind the filling element in the circumferential direction of the milling drum, respectively, and to the surface of the milling drum rotor. At least a subset of the filling elements have a base body to which at least one protrusion projecting radially outwards is integrally formed, and the protrusion is welded to the rear end of the front bottom part or to the front end of the rear bottom part.