Parting Insert Grinding Angle for Flatter 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 using a rotating grinding wheel with a plane surface, where the parting/grooving insert is positioned such that the main clearance surface is parallel to the grinding surface, and the normal vector of the main cutting edge forms an angle of at least 20 degrees with the tangential direction of rotation, allowing for angled grinding marks that improve edge quality and reduce pressure on the cutting edge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the insert is moved up and down relative to the curved grinding surface to grind the main clearance surface, then the main clearance surface can be ground flat, but the processing time increases and the cutting edge quality deteriorates

Engineering Contradiction:

Improveflatness of main clearance surfaceVSAvoidprocessing time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

Instead of moving the insert up and down relative to the grinding wheel as in conventional methods, the invention inverts the approach by keeping the insert stationary and rotating the grinding wheel. The grinding wheel's plane surface rotates against the stationary insert, achieving the same grinding effect without the time-consuming vertical movements of the insert.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The invention introduces dynamic rotation of the grinding wheel to replace the static or slowly moving insert approach. By rotating the grinding wheel at controlled speeds, the method achieves efficient material removal and surface finishing while maintaining precise control over the grinding process, significantly reducing processing time compared to manual insert movement.

Inventive Principle:

Principle #15Dynamics

2Ease of manufacture

If the normal vector of the main cutting edge is parallel to the tangential direction of rotation, then grinding is simplified, but the cutting edge quality deteriorates due to increased pressure and chipping

Engineering Contradiction:

Improvesimplicity of grinding processVSAvoidquality of cutting edge

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The invention optimizes the angular parameter by positioning the insert such that the normal vector of the main cutting edge forms an angle of 20-70 degrees with the tangential direction of rotation. This parameter optimization reduces grinding pressure on the cutting edge, prevents chipping, and maintains edge quality while keeping the process straightforward.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If multiple clearance surfaces and cutting edges are ground by moving the insert, then all surfaces can be ground, but the processing time increases

Engineering Contradiction:

Improveability to grind multiple surfacesVSAvoidprocessing time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The invention makes the grinding wheel universal by designing it with a plane grinding surface that can grind all clearance surfaces and cutting edges of the insert without requiring tool changes or complex repositioning. The rotating plane surface adapts to grind multiple surfaces efficiently, reducing total processing time while maintaining versatility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

This method enhances the flatness and quality of the cutting edge, reduces the risk of chipping, and shortens processing times by allowing the insert to remain in a single position, improving both cutting performance and insert lifespan.

Implementation Method 1

grinding the main clearance surface with a rotating grinding wheel including a plane grinding surface

Methodology Applied

Scientific EffectAbrasion: Abrasion

Data Source

PatentUS11890683B2Method of grinding a parting/grooving insert and a parting/grooving insert

Publication Date: 2024.02.06 SANDVIK INTELLECTUAL PROPERTY AB

AI summary

A parting/grooving insert and a method of grinding a parting/grooving insert including rotating a plane grinding surface having a normal vector parallel to the axis of rotation and a tangential direction of rotation; providing a parting/grooving insert including a rake surface, a main clearance surface, and a main cutting edge formed between the rake and main clearance surfaces; orienting/positioning the insert relative to the grinding surface, such that the main clearance surface is parallel to the grinding surface, the normal vector of the main cutting edge being in the plane of the main clearance surface and with a vector component in the direction of rotation forming an angle to the tangential direction of rotation at the insert of at least 20 degrees from parallel orientation; and grinding the main clearance surface to provide grinding marks having an angle to the normal vector of the main cutting edge corresponding to the angle to the tangential direction of rotation.