Parting/Grooving Insert Grinding for Flat Clearance Surfaces
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Solution Overview
Problem
Existing methods for grinding parting/grooving inserts fail to achieve optimal flatness of clearance surfaces and cutting edge quality, leading to inefficiencies and increased processing times.
Innovation Solution
A grinding method that uses a plane grinding surface with angled grinding marks to improve the macro- and micro-geometrical shape of the cutting edge, allowing for reduced grinding pressure and minimizing edge chipping, while enabling the insert to remain stationary during processing, reducing the need for multiple positional changes and shortening processing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a radially outer curved grinding surface is used with up-and-down insert movement, then the main clearance surface can be grinded, but the flatness of the clearance surface and quality of the cutting edge deteriorate
Solution Approach 1:
Instead of moving the insert up and down on a curved grinding surface, the invention inverts the approach by using a plane grinding surface and rotating the insert to different angular positions. This inversion of the grinding geometry and motion method resolves the technical contradiction by providing both high precision and efficiency.
Solution Approach 2:
The invention changes the fundamental parameters of the grinding system: replacing a curved grinding surface with a plane grinding surface, and changing the motion from vertical displacement to angular rotation. These parameter changes enable simultaneous achievement of high flatness and reduced processing time.
2Adaptability or versatility
If multiple positional changes are made during grinding, then different clearance surfaces can be grinded, but processing time increases
Solution Approach 1:
The invention segments the grinding process into distinct angular positions (e.g., 0° for main clearance surface, 90° for side clearance surfaces). Each position is optimized for specific surfaces, allowing all clearance surfaces to be grinded systematically without excessive repositioning time.
Solution Approach 2:
The insert is pre-positioned at optimal angular orientations before grinding begins. By establishing the correct angular positions in advance and using a plane grinding surface that accommodates multiple orientations, the need for time-consuming repositioning during the grinding process is minimized.
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
The method enhances cutting performance and insert lifespan by achieving higher edge quality and reducing processing time through improved edge rounding and reduced chipping, allowing for efficient grinding of all clearance surfaces and cutting edges on a single plane.
Implementation Method 1
A grinding surface is provided on an outer curved radial surface of a grinding wheel, and the main clearance surface is grinded by placing the insert towards this radially outer curved grinding surface
Data Source
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AI summary
A parting/grooving insert (1) and a method of grinding a parting/grooving insert comprising rotating a plane grinding surface (2), having a normal vector parallel to the axis of rotation (X), and a tangential direction of rotation (R) in the surface plane, providing a parting/grooving insert comprising a rake surface (3), a main clearance surface (4), and a main cutting edge (5) formed between the rake surface and the main clearance surface, orienting and positioning the parting/grooving insert relative to the grinding surface such that the main clearance surface (4) is parallel to the grinding surface (2), and such that a normal vector (N) of the main cutting edge in the plane of the main clearance surface and with a vector component in the direction of rotation (R) forms an angle to the tangential direction of rotation at the position of the parting/grooving insert, the angle being at least 20 degrees from parallel orientation, and grinding the main clearance surface, thus obtaining grinding marks (6) having an angle (α) to the normal vector of the main cutting edge corresponding to the angle to the tangential direction of rotation.