Block-Cutting Gangsaw Oscillating Frame for Granite
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Solution Overview
Problem
Existing block-cutting machines face challenges in maintaining high contact pressure between the blade and granite, leading to blade breakage due to uneven load distribution and progressive curvature, which is not effectively addressed by prior technologies.
Innovation Solution
A block-cutting gangsaw system that combines reciprocating motion of the frame with an oscillating movement of the frame guides, creating an approximately circular contact area between the blade and the block, distributing the load and wear along the blade's length while maintaining high contact pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a linear vertical movement of the blade-holding frame is maintained, then the structure is simple, but the load concentrates on the upper and lower ends of the block causing blade breakage
Solution Approach 1:
The patent transforms the static linear movement into a dynamic oscillating movement. The blade-holding frame oscillates horizontally around a vertical axis while moving vertically, creating a circular cutting trajectory. This dynamic movement distributes the load along the blade length, preventing concentration at the ends and avoiding blade breakage.
Solution Approach 2:
The patent introduces a curved cutting trajectory by combining vertical reciprocating motion with horizontal oscillating motion. The blade follows a circular path during cutting, which distributes the cutting forces evenly along the blade's length, eliminating the stress concentration that occurs with linear movement.
2Productivity
If the contact area between the blade and granite is limited to increase contact pressure, then the cutting efficiency improves, but the contact area becomes too small causing uneven load distribution
Solution Approach 1:
The oscillating movement continuously changes the contact point along the blade length, ensuring that different sections of the blade engage with the granite at different times. This dynamic engagement maintains high contact pressure while distributing the load uniformly across the entire blade, preventing localized overload.
Solution Approach 2:
The blade undergoes periodic oscillation during the cutting stroke, with different segments of the blade making contact with the granite in a repeating cycle. This periodic engagement ensures that the entire blade length participates in cutting, maintaining both high pressure and uniform load distribution.
3Productivity
If the block advance speed is increased to improve productivity, then the cutting speed increases, but the blade curvature becomes progressive leading to blade breakage
Solution Approach 1:
The oscillating movement compensates for the increased block advance speed by continuously adjusting the blade's engagement point. This dynamic adjustment prevents progressive curvature buildup even at higher speeds, maintaining blade structural integrity while enabling faster production.
4Reliability
If the contact area between blade and block is increased to distribute load, then blade durability improves, but the contact pressure decreases reducing cutting efficiency
Solution Approach 1:
The oscillating movement creates a dynamic balance where the contact area is sufficiently large to distribute load but the motion maintains high contact pressure through continuous engagement. The blade sweeps through a circular path, ensuring both adequate contact area and sustained pressure for efficient cutting.
Data Source
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AI summary
Block-cutting gangsaw with vertical frame for cutting granite or other hard materials, comprising a blade-holding frame (19) that is supported with the possibility of reciprocating movement on an independent oscillating frame (40) which imparts the oscillating movement to it, so that each blade (20) of blade-holding frame (19) is always in contact with workpiece (18), and the contact area moves along a convex, curved trajectory.