Disk Cutting Blade Resilient Attachment for Sawing Machines
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Solution Overview
Problem
Existing portable hand-held cutting and sawing machines face issues with heat transfer during brazing or welding of disk-shaped cutting blades, leading to reduced quality and strength, increased mechanical stress, and high manufacturing costs, especially when used in deep cutting operations like the 'Cut and Break' method.
Innovation Solution
A resilient attachment method between the disk-shaped cutting blade and the blade driving member is achieved without brazed or welded joints, using a recessed portion with beveled edges and collar segments, along with a drive arrangement to prevent relative turning, and laser welding to secure the components, reducing heat transfer and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If brazing or welding is used to attach the cutting blade to the driving member, then the attachment reliability is improved, but manufacturing cost increases
Solution Approach 1:
Instead of brazing or welding the entire cutting blade to the driving member, only specific portions or features are brazed or welded. For example, only the outer segments are brazed to the blade body, or only specific attachment points on the blade are welded to the driving member. This partial application reduces material consumption, manufacturing complexity, and cost while maintaining sufficient attachment reliability for the application.
2Use of energy by moving object
If the cutting blade is made thin to reduce power demand, then energy consumption is reduced, but the blade becomes more susceptible to heat damage and stress
Solution Approach 1:
The cutting blade is constructed as a composite structure combining different materials with complementary properties. The blade body uses high-strength steel for structural integrity, while the outer segments use diamond-impregnated material for cutting performance. This composite construction allows the blade to be thin enough to reduce power demand while maintaining sufficient strength through the combination of materials and optimized geometry.
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 maintains the cutting blade's quality and strength, reduces stress concentrations, and lowers manufacturing costs, while ensuring reliable operation under demanding conditions, particularly for portable hand-held machines.
Implementation Method 1
a friction grip between the disk shaped cutting blade and the blade driving member is provided
Implementation Method 2
The at least partly recessed portion includes a first flanged collar segment which is bent out of a main extension plane of the disk shaped cutting blade
Implementation Method 3
The blade supporting part and the main part are laser welded to each other
Data Source
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AI summary
A tool unit (3) for a cutting or sawing machine with a tool carrier (103) enabling especially deep cuts, comprises a first tool (1) and a second part (2, 50). The first tool (1) comprises a disk shaped cutting blade (10) and a first blade driving member (40). The second part (2, 50) comprises either a second blade driving member (50), or a second tool (2) comprising a disk shaped cutting blade (10) and a second blade driving member (50). The first tool (1) is secured to the second part (2, 50) by means of a central clamping unit. Each cutting blade (10), has a central aperture defined by a central edge, and a peripheral cutting edge (13), being the working part of the tool (1, 2). The blade driving members (40, 50) are arranged to rotate together with the disk shaped cutting blade/s (10) about an axis of rotation (A). At least one of the driving members (40, 50) has a circumferential driving surface (41, 51) provided to be able to cooperate with an endless power transmission means. Each blade driving member has a central attachment portion (44,54) comprising at least one aperture (47, 57) for 15 attaching the first driving member (40) to the second driving member (50) by using the central clamping unit. The at least one disk shaped cutting blade (10) has an at least partly recessed portion, adjacent to the central aperture. The at least partly recessed portion is provided for attaching the disk shaped cutting blade (10) to the corresponding blade driving member (40, 50) by holding the recessed portion axially between a main part and a blade supporting part of the corresponding blade driving member, ensuring an essentially flat outer extension plane of each tool (1, 2).