Face Milling Cutter with Wave Insert for Mesh Surface Roughness
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Solution Overview
Problem
Existing face milling cutters struggle to efficiently create a mesh pattern with the required surface roughness on workpieces, particularly in structures like engine blocks, where precise surface properties are crucial for sealing effectiveness.
Innovation Solution
The face milling cutter design incorporates at least two primary cutting inserts for forming a milled flat surface, a pattern forming insert with a wave-shaped relief surface to create a grooved pattern, and a calibrating insert to adjust surface roughness. This configuration allows for increased feed per revolution and greater flexibility in adjusting feed per tooth, enabling the creation of various surface properties with the same tool setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional face milling cutter with ordinary cutting inserts is used, then a smooth flat surface is formed on the workpiece, but the required mesh pattern and surface roughness (Ra 1.2-2.5) cannot be achieved directly
Solution Approach 1:
The cutting tool is segmented into functionally distinct inserts: primary cutting inserts for material removal and surface formation, and a pattern forming insert with wave-shaped relief surface for creating the mesh pattern. This segmentation allows each insert to be optimized for its specific function, achieving both the required surface roughness and pattern in a single machining operation.
Solution Approach 2:
The pattern forming insert is positioned axially forward of the primary cutting inserts, so that the mesh pattern is formed on the workpiece surface before the primary cutting inserts complete their cutting action. This preliminary formation of the pattern ensures that the final surface finish meets the required Ra 1.2-2.5 specification while maintaining high productivity.
2Manufacturing precision
If the axial position of the pattern forming insert is adjusted to achieve desired surface roughness, then the surface pattern quality improves, but the device complexity increases
Solution Approach 1:
The wave-shaped relief surface on the pattern forming insert introduces a new geometric parameter (wave shape) that directly controls the mesh pattern characteristics. By varying the wave shape parameters during insert manufacturing, different surface roughness and pattern configurations can be achieved without modifying the tool body or positioning mechanisms, thereby reducing device complexity while maintaining pattern quality.
3Adaptability or versatility
If multiple types of inserts are used in the same tool body, then versatility in achieving different surface properties is improved, but the ease of operation deteriorates due to more complex insert selection and installation
Solution Approach 1:
The tool body is designed with standardized insert seats that can accommodate both primary cutting inserts and the pattern forming insert using the same mounting mechanism. This universal seat design allows operators to install different insert types without requiring different installation procedures or tools, maintaining ease of operation while achieving versatility in surface property creation.
Data Source
AI summary
A face milling cutter includes a tool body provided with several primary cutting inserts including a pattern forming insert with a pattern forming cutting edge for forming a grooved pattern in a milled flat surface formed on a workpiece by the primary cutting inserts, and a calibrating insert with a calibrating cutting edge for cutting summits in the grooved pattern. The pattern forming cutting edge is wave-shaped as seen from a direction facing a rake face of the pattern forming insert with a periodic wave shape having a plurality of wave crests and intermediate wave troughs. The calibrating cutting edge is located axially between the wave crests and wave troughs of the pattern forming cutting edge, as seen in a direction from the rear end of the tool body towards the front end of the tool body in parallel with the longitudinal axis of the tool body.