Segmented Electrode Milling Cutter for Spot Welding
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Solution Overview
Problem
Existing electrode milling cutters remove excessive material from spot welding electrodes, leading to premature replacement and increased production downtime due to clogging and positioning inaccuracies, as they cannot efficiently remove less than 0.1 mm of material without compromising milling performance.
Innovation Solution
The electrode milling cutter features milling edges with strategically placed cut-outs, which create annular swellings during machining, allowing for precise material removal and reduced chip size, extending electrode life and preventing clogging, while maintaining smooth contact areas for consistent welding results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional electrode milling cutters are used, then the milling operation can be performed, but excessive material is removed (0.2-0.3 mm instead of 0.1 mm), leading to premature electrode replacement
Solution Approach 1:
The milling edge is segmented into multiple discrete milling points separated by cut-outs, allowing controlled material removal at specific locations while preserving material between segments. This enables precise removal of only 0.1 mm as needed without excessive material loss.
Solution Approach 2:
The milling cutter applies different functions to different parts of the electrode surface - active milling points remove material precisely where needed, while cut-out regions preserve material and create positioning swellings. This local differentiation enables precise material removal control.
2Productivity
If conventional electrode milling cutters are used, then the milling operation can be performed, but the milling cutter frequently gets clogged due to large copper chips
Solution Approach 1:
The segmented milling edge creates multiple small cutting actions instead of one large cutting action, producing smaller chips that are less likely to clog the cutter. The cut-outs act as chip breakers and evacuation channels.
Solution Approach 2:
The cut-outs in the milling edge extract the chip breaking and evacuation function from the continuous milling edge, creating dedicated spaces for chip management that prevent clogging.
3Measurement precision
If conventional electrode milling cutters are used, then material can be removed, but positioning accuracy deteriorates due to lack of reference features
Solution Approach 1:
The cut-outs create annular swellings on the electrode surface before the final milling operation, providing pre-formed positioning references that guide the electrode into correct position during subsequent milling operations.
Solution Approach 2:
The milling cutter creates its own positioning features (annular swellings at cut-out locations) that automatically guide electrode positioning, eliminating the need for external positioning mechanisms.
4Loss of substance
If the milling speed is reduced below 200-700 rpm to reduce material removal, then material removal decreases, but milling results deteriorate with vibrations and poor machining quality
Solution Approach 1:
The segmented milling edge distributes the cutting action across multiple discrete points, reducing the total material removal per revolution while maintaining cutting effectiveness at each point. This allows operation at optimal speeds without excessive material removal.
Data Source
AI summary
Electrode milling cutter for machining spot welding electrodes, said electrode milling cutter having one or more milling edges, wherein at least one of the milling edges is interrupted by one or more cut-outs at one or more points. The invention also relates to a milling device and to an apparatus for subsequently machining spot welding electrodes.