Segmented Saw Guide Plates for Thermal Load Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increased cutting performance of sawing machines leads to higher thermal loads on saw bands or blades due to increased surface pressure and friction, causing martensitic hardening and brittleness, which results in rapid wear and tear.
Innovation Solution
The use of inclined, flat high-strength guide plates spaced apart to reduce surface pressure and distribute frictional heat, combined with coolant introduction to manage thermal loads and prevent chip accumulation, ensures effective lateral guidance and extended saw band or blade life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cutting performance is increased, then productivity is improved, but thermal load on saw band or blade increases causing martensitic hardening and brittleness
Solution Approach 1:
The guide is divided into multiple separate guide plates (first guide plate, second guide plate, etc.) instead of a single continuous guide surface. This segmentation distributes the contact area and reduces concentrated thermal load on any single point of the saw band or blade, while still providing effective guidance at high cutting speeds.
Solution Approach 2:
The guide plates are arranged in a spaced-apart configuration along the direction of movement, creating a multi-dimensional guidance system. This spatial arrangement allows the saw band or blade to be guided at multiple points simultaneously, distributing frictional heat across different locations and reducing overall thermal accumulation.
2Reliability
If high-strength sliding elements are used for lateral guidance, then guidance stability is improved, but frictional heat generation increases due to increased surface pressure and relative speed
Solution Approach 1:
The continuous guide surface is segmented into multiple discrete guide plates with gaps between them. This segmentation maintains guidance stability through multiple contact points while reducing the total contact area, thereby lowering frictional heat generation despite high surface pressure and relative speed conditions.
Solution Approach 2:
The guide plates are positioned to provide localized guidance at critical points along the saw band or blade path. Each guide plate provides high-strength localized support where needed for stability, while the gaps between plates allow heat dissipation and reduce overall frictional heating.
3Productivity
If cutting pressure is increased to enhance productivity, then productivity is improved, but surface pressure between guide and saw band increases leading to rapid wear
Solution Approach 1:
The guide system uses multiple spaced guide plates instead of a single continuous contact surface. This segmentation distributes the high cutting-induced surface pressure across multiple separate contact points, preventing excessive localized stress that would cause rapid wear, while still providing effective guidance for high-productivity cutting operations.
4Object-generated harmful factors
If narrow carbide ribs are used as sliding elements, then chip accumulation is prevented, but heat load on saw blade increases due to limited contact area
Solution Approach 1:
The guide system uses multiple spaced guide plates with gaps between them, which prevents chip accumulation similar to narrow ribs, but distributes the contact area across multiple plates rather than concentrating it on narrow ribs. This segmentation maintains chip ejection capability while reducing heat load through increased total contact area and improved heat dissipation.
Solution Approach 2:
Instead of using narrow ribs oriented in the direction of movement (one-dimensional approach), the invention uses multiple guide plates spaced apart in the transverse direction (multi-dimensional approach). This creates gaps that prevent chip accumulation while distributing thermal load across multiple locations, reducing peak heat load on the saw blade.
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 design significantly reduces thermal loads on saw bands or blades, prevents material embrittlement, and extends their service life while maintaining effective chip removal, ensuring stable performance under increased cutting pressures.
Implementation Method 1
the increased cutting pressure and the increased speed of the saw band or saw blade increase, on the one hand, the surface pressure between the high-strength sliding elements of the guide and the saw band or saw blade, and on the other hand, the relative speed of these components, which at least temporarily slide against each other, also increases. Both of these factors lead to a significantly increased heat generation due to greatly increased friction.
Implementation Method 2
the high-strength guide plates, or at least one of the guide plates, have an upstream edge with respect to the direction of movement of the saw blade or saw band, which is at least partially straight or provided with a continuous curvature, wherein the edge – or, in the case of curved edges, their tangents – is inclined at an angle of between 20° and 70° to the direction of movement of the saw blade or saw band
Implementation Method 3
The inclination of the upstream edges according to the invention is particularly preferred such that chips accumulated in gaps, or more generally, chips running onto the edge, are guided downwards or outwards towards the saw teeth of the saw band or saw blade. According to the invention, the inclination of the upstream edges of the high-strength guide plates is therefore oriented such that the saw band or saw blade first reaches the guide plates in a region of their edges furthest from the saw teeth. Through the vectorial addition of the forces exerted on any chips present by the saw band or saw blade moving away from the guide plate, these chips are then moved along the inclined edge towards the saw teeth and ejected there.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The guide (2) has high-strength guide plates (15) made of hard metal and/or ceramic. The plates are spaced from each other under formation of gap (18) and attached to a holding plate (14) for lateral guidance of a saw belt (3) or a saw leaf. The guide plates have edges (16) arranged upstream with respect to a movement direction of the belt or the leaf, where the edges are partially formed as straight or provided with a continuous curvature. The edges or tangents of the edges are inclined at an angle between 20 and 70 degrees in the direction.