Floating Cutter Unit Structure to Prevent Trim-Line Scoring
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Solution Overview
Problem
The existing floating cutter units in trimming press processing devices face issues with scoring and debris due to narrow gaps between the floating cutter and the main trimming press upper die, caused by errors in mounting positions, which affect the finish quality of the cut surface.
Innovation Solution
A floating cutter unit with a pair of cutters attached to the holder set on both sides of the floating cutter, allowing for precise gap control and preventing axial movement of the cutters relative to the main trimming press upper die, thereby preventing scoring and improving finish quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the gap between the floating cutter and the main trimming press upper die is set narrow to achieve fine finish, then the finish quality improves, but scoring and debris generation occur due to mounting position errors
Solution Approach 1:
The patent introduces a holder set as an intermediary component between the floating cutter and the main trimming press upper die. The holder set includes a cutter holder and a bush that provides a sliding contact interface, acting as a mediator that absorbs mounting position errors and prevents direct contact between the floating cutter and the main die, thereby eliminating scoring and debris while maintaining narrow gap for fine finish.
Solution Approach 2:
The patent extracts the floating cutter from direct contact with the main trimming press upper die by introducing a separate holder set structure. The floating cutter is mounted in the cutter holder which slides on the bush, separating the floating cutter's movement function from the main die structure, thus preventing harmful interactions while preserving cutting precision.
2Manufacturing precision
If the floating cutter is allowed to move axially to compensate for mounting errors, then the finish quality improves, but the cutter generates scatter iron wear debris
Solution Approach 1:
The bush in the holder set serves as an intermediary that guides the axial movement of the cutter holder. This intermediary component provides a controlled sliding interface that allows the floating cutter to move axially to compensate for mounting errors while preventing uncontrolled movement that would generate scatter iron wear debris.
Solution Approach 2:
The patent makes the cutter holder movable in the axial direction through the bush, allowing dynamic adjustment of the floating cutter's position. This dynamic capability enables the system to adapt to mounting position errors and maintain fine finish quality while the controlled movement mechanism prevents excessive friction and debris generation.
3Object-affected harmful factors
If a pair of cutters is added to both sides of the floating cutter to prevent axial movement, then scoring is prevented, but the device complexity increases
Solution Approach 1:
The patent segments the cutting function by adding a pair of cutters to both sides of the floating cutter within the holder set. This segmentation provides multiple cutting points that stabilize the cutting process and prevent axial movement of the floating cutter relative to the main die, preventing scoring while the modular holder set design keeps the added complexity manageable.
Solution Approach 2:
The patent combines multiple functions into the holder set structure: it holds the floating cutter, provides axial movement guidance through the bush, and accommodates the pair of cutters. This merging of functions into a single integrated component achieves scoring prevention without proportionally increasing overall device complexity.
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
The solution enables a fine finish along the trim line while preventing scoring between the floating cutter and the main trimming press upper die, allowing for accurate gap setting and using high hardness materials for the cutters to enhance resistance and finish quality.
Implementation Method 1
a spring, which is in contact with a tail end surface of the floating cutter and gives reaction force to the floating cutter
Implementation Method 2
a bush, which is fitted in the through-hole of the cutter holder and has an inner peripheral surface that comes in sliding contact with the outer peripheral surface of the floating cutter
Data Source
AI summary
The present invention makes it possible to obtain a fine finish along a trim line in a plate material while preventing scoring between a floating cutter and a main trimming press upper. A floating cutter unit is provided with: a floating cutter for cutting scrap from a plate-shaped material, said floating cutter being attached to and used in a trimming press processing device that cuts scrap from a plate material along a trim line Tr and that additionally cuts scrap along a scrap cut line Sc; a holder set for holding the floating cutter so as to be movable in the direction of an axial center O; a spring that is brought into contact with the tail end surface of the floating cutter and that applies reaction force to the floating cutter; and a pair of cutters that are attached to the holder set and positioned on both sides of the floating cutter along the trim line Tr.