Die Assembly Guide Rod Segmentation for Punching Precision
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Solution Overview
Problem
Conventional die assemblies face issues with punching failures and damage due to press ram inclination or deflection, and stripper plate movement during transportation, leading to inaccurate punching and maintenance challenges.
Innovation Solution
A die assembly with guide rods, where the stripper plate is disconnected from the press ram during punching and connected during maintenance, using a lower rod fixed on the stripper plate and a removable upper rod for engagement with the upper die, allowing the stripper plate to move freely during punching and being held in place during maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stripper plate is connected to the press ram, then the stripper plate is stable during transportation, but the positional relationship between the upper die and lower die becomes uneven due to press ram inclination or deflection during punching
Solution Approach 1:
The guide rod is divided into two separate segments: a lower guide rod fixed to the lower die and an upper guide rod fixed to the upper die. These segments can move relative to each other along the guide rod axis, allowing the stripper plate to be decoupled from press ram movements while maintaining stability. This segmentation enables independent movement of each component to resolve the contradiction between stability and positioning precision.
Solution Approach 2:
The guide rod acts as an intermediary element between the upper die and lower die. It provides a reference axis that allows both dies to move independently while maintaining their positional relationship. The guide rod absorbs the effects of press ram inclination or deflection, preventing these movements from affecting the precision of the punching operation.
2Manufacturing precision
If the stripper plate is disconnected from the press ram during punching, then the positional relationship between upper die and lower die is maintained, but the stripper plate moves sideways during transportation causing punch damage
Solution Approach 1:
The connection between the upper and lower guide rods is made dynamic rather than fixed. The upper guide rod can slide along the lower guide rod, allowing the system to adapt its rigidity based on operational needs. During punching, the dynamic connection maintains precision by allowing independent die movement, while during transportation, the same dynamic connection provides stability by allowing the rods to move together as a unit.
3Manufacturing precision
If guide rods are provided to maintain positional relationship, then punching precision is improved, but the device complexity increases
Solution Approach 1:
The guide rod structure serves multiple functions simultaneously: it provides a reference axis for maintaining positional relationships, allows independent die movement, absorbs inclination and deflection effects, and enables easy assembly and disassembly. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving high punching precision.
Data Source
AI summary
A die assembly having a guide rod that includes a lower rod which is fixedly placed on a stripper plate which guides a punch for engagement with a lower die and an upper rod which is placed removably on the stripper plate for engagement with an upper die. When punching a material for punching, the upper rod is removed from the stripper plate so as to put the upper plate and the stripper plate in a disconnected state, i.e., so that the stripper plate is made free to move backwards and forwards relative to the lower die by the lower rod. When the material for punching is not punched, the upper rod is attached to the stripper plate so as to put the upper die and the stripper plate in a connected state by the upper rod, so that the stripper plate is held on to the upper die.