Spiral Peripheral Milling Cutter for Smooth Longitudinal Edge Machining
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Solution Overview
Problem
Existing methods for machining longitudinal edges of metal workpieces using peripheral milling cutters result in high cutting speeds and short chips, leading to low feed rates, poor surface quality with ripples, and short cutter service lives, which are inefficient and economically disadvantageous.
Innovation Solution
A method and device utilizing a peripheral milling cutter with spiral cutting edges that contact the workpiece surface at regular intervals with multiple teeth at equal depths, where the cutting edges move in the feed direction, and the chip separation occurs over the length of the tooth spacing, allowing for high feed rates and low cutting speeds, and featuring a conical section for efficient chip management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional peripheral milling cutters are used with high cutting speeds, then the cutting process can be maintained, but the feed rate remains below 100 m/min resulting in low productivity
Solution Approach 1:
The cutting edge is segmented into multiple teeth (at least 2, preferably 3-10 teeth) distributed along the effective length of the cutting edge. This segmentation allows multiple teeth to contact the workpiece simultaneously at regular intervals, enabling high feed rates while maintaining manageable chip lengths between teeth
Solution Approach 2:
The cutting edge is extended in the feed direction (longitudinal dimension) to create an effective length that is at least 0.1 times the overall tool length, preferably 0.2-0.5 times. This dimensional extension transforms the traditional point-contact cutting into a distributed line-contact cutting along the feed direction, allowing simultaneous engagement of multiple teeth
2Manufacturing precision
If traditional milling methods are used, then cutting can be performed, but the processing surface is afflicted with ripples and corrugations reducing surface quality
Solution Approach 1:
Multiple teeth are distributed along the effective length of the cutting edge at regular intervals. This segmentation ensures that the material removal is distributed uniformly across multiple contact points, preventing the formation of ripples and corrugations on the processing surface
Solution Approach 2:
All teeth are engaged with an equal depth of cut and contact the workpiece at regular intervals. This homogeneous distribution of cutting action across multiple teeth ensures uniform material removal and produces a smooth, ripple-free processing surface
3Duration of action of stationary object
If high cutting speeds are used with traditional cutters, then cutting can be maintained, but the cutter service life is short and economic efficiency is low
Solution Approach 1:
The cutting edge is divided into multiple teeth that share the cutting load. This segmentation reduces the stress on each individual tooth, allowing the cutter to operate at high feed rates without compromising service life, thereby improving economic efficiency
Solution Approach 2:
The cutter is designed to operate dynamically at high feed rates (exceeding 100 m/min, preferably 200-500 m/min) while maintaining controlled cutting speeds. The distributed tooth engagement allows the system to adapt to high-speed operation without excessive wear on individual teeth
Data Source
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AI summary
A method for machining long edges of metal workpieces (2), wherein during the machining of the workpiece (2), all the cutting edges (z) are put into engagement with the machining surface (B) over an effective length (l) and having a cutting depth (t), and the removal of the chips is effected in each case over a length which is equivalent to the tooth spacing (as) between the adjacent teeth simultaneously with their motion along the effective length (l).