Die Cutting Insert Angled Guide Trim Punch
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Solution Overview
Problem
Die cutting of aluminum sheets often results in the formation of slivers and galling due to excessive friction at the cutting edges, which is not effectively addressed by traditional die cutting methods that require significant punch movement and contact with the die block.
Innovation Solution
A die cutting insert with a trim punch that moves along an angled guide surface, allowing for increased clearance between the punch and die block, reducing friction and enabling cutting at a distance from the die block, thereby minimizing sliver formation and galling. The trim punch is designed to move in two translatory directions, reducing the distance traveled during the cutting process and using a resilient member to bias the punch towards its retracted position for efficient cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional die cutting methods are used with significant punch movement and contact with the die block, then the cutting process can be completed, but slivers and galling are formed due to excessive friction at the cutting edges
Solution Approach 1:
The trim punch is arranged along an angled guide surface instead of moving purely vertically, enabling it to move in two translatory directions (vertical and horizontal). This dimensional change allows the punch to increase clearance from the die block during cutting, reducing friction and sliver formation while maintaining effective cutting action
2Manufacturing precision
If the punch moves a longer distance during cutting, then the cutting process can be completed thoroughly, but heat generation and friction increase leading to more slivers and galling
Solution Approach 1:
By enabling the trim punch to move along an angled guide surface with both vertical and horizontal components, the cutting action is achieved over a shorter total distance. The horizontal movement component allows the punch to clear the die block earlier, reducing the path length and thereby minimizing heat generation and friction
3Device complexity
If the trim punch is fixed in position, then the device structure is simpler, but clearance cannot be increased to reduce friction and sliver formation
Solution Approach 1:
The trim punch is designed to be movable along the angled guide surface rather than fixed, allowing dynamic adjustment of clearance during the cutting cycle. This movement capability enables the punch to optimize its position relative to the die block, increasing clearance to reduce friction while maintaining structural simplicity through the guided motion mechanism
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
Significantly reduces sliver and galling formation by increasing clearance between cutting edges, minimizing heat generation, and reducing the distance the punch needs to travel, resulting in improved cutting efficiency and reduced material waste.
Implementation Method 1
using a resilient member to bias the punch towards its retracted position
Data Source
AI summary
The present invention relates to a die cutting insert comprising a punch shoe having an angled guide surface. The die cutting assembly further comprises a trim punch arranged at least partly along the angled guide surface, such that the trim punch is movable along the angled guide surface between a first, extended position and a second, retracted position. In further aspects, the invention relates to a die cutting assembly and a method of cutting sheet metals.