Single-Blade Belt Finger Cutting With Indexed Pivoting Table
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Solution Overview
Problem
Existing cutting apparatuses for forming belt ends, such as those used in vulcanized splicing, face issues with dimensional inaccuracies and inefficiency due to the use of multiple blades and manual operation, leading to increased maintenance and the risk of faulty cuts, especially when dealing with thicker polymeric belts.
Innovation Solution
A cutting apparatus with a single linear blade and a rotatable actuator that continuously reciprocates the blade while intermittently shifting and pivoting the table, allowing for the formation of dimensionally accurate fingers with a single blade, reducing the need for manual indexing and improving cutting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple blades are used to cut both sides of belt fingers, then cutting capability is improved, but manufacturing precision deteriorates due to dimensional inaccuracies and blade separation
Solution Approach 1:
The patent divides the cutting operation into two sequential phases using a single blade: first cutting one side of the finger, then repositioning to cut the other side. This segmentation of the cutting process eliminates the precision problems associated with multiple blades while maintaining the ability to cut both sides of fingers.
Solution Approach 2:
Instead of using multiple blades simultaneously to cut both sides of fingers (conventional approach), the patent inverts the approach by using a single blade sequentially, with the blade remaining stationary and the table moving to reposition the belt for the second cut.
2Device complexity
If manual indexing is used to reposition the belt between cuts, then device complexity is reduced, but productivity deteriorates due to repeated pausing and time-consuming operations
Solution Approach 1:
The patent combines the blade reciprocation mechanism with the table indexing mechanism into a single integrated system. The blade reciprocates continuously while the table automatically indexes to new positions at predetermined intervals, merging two previously separate operations into one coordinated process that eliminates manual intervention.
Solution Approach 2:
The table is pre-positioned at predetermined intervals along its travel path, so that when the blade completes a cutting stroke, the table has already been indexed to the correct position for the next cut. This preliminary positioning eliminates waiting time and maintains continuous blade motion.
3Productivity
If V-shaped blades with corners are used, then cutting capability is improved, but reliability deteriorates due to material accumulation in corners causing faulty cuts
Solution Approach 1:
The patent uses a straight linear blade instead of a symmetric V-shaped blade. This asymmetric (linear) blade design eliminates corners where material could accumulate, ensuring clean cuts and preventing the reliability problems associated with material buildup in V-shaped blade corners.
Data Source
AI summary
A cutting apparatus for forming fingers in an end of a belt is provided and includes a blade for cutting the belt and a table for positioning the belt below the blade. The cutting apparatus includes an actuator that is connected to the blade via a primary shaft. The actuator is also connected to the table via both a secondary shaft and a cam assembly. Rotation of the actuator causes the primary shaft to continuously reciprocate the blade in upward and downward directions. Rotation of the actuator also causes intermittent movement of the table that includes both translation of the table to index the belt relative to the blade, and pivoting of the table to change an angle of the belt relative to the blade.