Circular Saw Blade Grinding Machine Precision Insert Machining

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Solution Overview

Problem

Existing circular saw blade grinding machines struggle to precisely machine all surfaces of hard metal inserts with minimal vibration and asymmetrical loading, leading to irregular stresses and potential destruction of the inserts.

Innovation Solution

A circular saw blade grinding machine equipped with a single drive motor and a quill system that allows for precise guidance of grinding wheels, using a combination of grinding wheels for leveling, tooth face, and tooth back grinding, with a pivoting mechanism that ensures optimal use of flat side surfaces for high-precision machining.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single drive motor is used to reduce machine complexity, then device complexity is reduced, but manufacturing precision deteriorates due to difficulty in machining all surfaces precisely

Engineering Contradiction:

Improvenumber of drive motorsVSAvoidprecision of hard metal insert surfaces

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The grinding process is segmented into multiple stations (first station for tooth flanks, second station for tooth face and back), each with dedicated grinding wheels. This allows a single drive motor to achieve precise machining of all surfaces by sequentially positioning different grinding wheels, resolving the contradiction between using one motor and maintaining high precision.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The single drive motor is designed with multi-functionality to drive different grinding wheels at different stations. The motor serves universal purposes by machining various surfaces (tooth flanks, tooth face, tooth back) through sequential positioning, eliminating the need for multiple motors while maintaining precision.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Manufacturing precision

If conventional grinding methods are used with multiple stations, then manufacturing precision is maintained, but device complexity increases due to multiple drive motors

Engineering Contradiction:

Improveprecision of hard metal insert surfacesVSAvoidnumber of drive motors

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

Multiple drive motors are merged into a single drive motor that sequentially drives different grinding wheels at different stations. The first grinding wheel for tooth flanks and the second grinding wheel for tooth face and back are both driven by the same motor, reducing device complexity while maintaining manufacturing precision through coordinated positioning.

Inventive Principle:

Principle #5Merging (Combining)

3Manufacturing precision

If tooth flanks are ground at a separate station, then manufacturing precision is improved, but productivity deteriorates due to multiple processing stations

Engineering Contradiction:

Improveflatness of tooth flanksVSAvoidgrinding cycle time

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The grinding process achieves continuity by sequentially machining tooth flanks at the first station and then tooth face and back at the second station without removing the workpiece. The single drive motor continuously drives different grinding wheels in sequence, maintaining useful action throughout the process and improving productivity while ensuring precision through dedicated grinding positions.

Inventive Principle:

Principle #20Continuity of useful action

4Ease of operation

If a single grinding head is used to reduce device complexity, then ease of operation is improved, but manufacturing precision deteriorates due to difficulty in guiding the drive motor

Engineering Contradiction:

Improveoperation simplicityVSAvoidguidance precision of drive motor

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The grinding head is designed with dynamic positioning capabilities, allowing it to pivot about a vertical axis and be tilted relative to the workpiece. This dynamic adjustment enables the single grinding head to reach different stations (first and second stations) and machine various surfaces precisely, maintaining ease of operation while achieving high manufacturing precision through controlled movement.

Inventive Principle:

Principle #15Dynamics

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 solution enables precise machining of all hard metal insert surfaces, reducing the risk of asymmetrical loading and extending the service life of the inserts and the circular saw blades by minimizing vibrations and ensuring accurate grinding.

Implementation Method 1

all surfaces of the hard metal inserts can be machined with the flat side surfaces of the grinding wheels

Methodology Applied

Scientific EffectAbrasion: Abrasion

Data Source

PatentEP2623243B1Circular saw blade grinding machine

Publication Date: 2015.07.22 ISELI & CO AG MASCHFAB

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AI summary

The machine has a drive motor that is pivotally arranged at a guide (3) passed between two machine bearing walls (2). The machine bearing walls are extended on two arcuate running rack gears (10) and pivotally or rotatably arranged on rotational axis of a rotary bearing plate. The rotational axis of a grinding disc is extended vertically to longitudinal axis of drive motor. The longitudinal axis of the guide and rotational or pivotal axis of the bearing plate are aligned so that the ends of guide and bearing blade are intersected on cutting edge of hard metal insert.