Rotary Stamper Die Plate Motion for Moving Web Alignment
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Solution Overview
Problem
Existing machining technologies for moving metal webs face inefficiencies due to non-ideal interactions between rotating punches and linearly moving metal webs, leading to damage and increased retooling needs, as the punch's vertical and lateral motions cause unwanted relative movement.
Innovation Solution
A rotary stamper design featuring a support frame with a drive assembly that rotates the upper die plate horizontally and vertically along a circular pathway, while the lower die plate moves linearly horizontally, ensuring constant alignment and speed matching with the moving web, minimizing relative horizontal movement during machining operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotating drum with punches is used to perform punching operations on a moving web of metal, then continuous machining can be achieved, but unwanted relative lateral movement occurs between the punch and web causing damage and limiting retooling frequency
Solution Approach 1:
The invention applies dynamics by making the die plate assembly movable rather than stationary. The die plate is connected to the support frame through linear bearing and rail assemblies, allowing it to reciprocate horizontally in sync with the circular motion of the upper die plate assembly. This dynamic adjustment eliminates unwanted relative lateral movement between the punch and web, resolving the reliability issue while maintaining continuous machining capability
Solution Approach 2:
The lower die plate assembly acts as an intermediary between the stationary support frame and the moving upper die plate assembly. By introducing this intermediate component that can move horizontally, the system mediates the motion transfer to achieve speed matching with the web, preventing damage while enabling continuous operation
2Productivity
If the upper die plate assembly moves in a circular pathway to enable continuous operation, then productivity increases, but alignment consistency with the lower die plate becomes difficult to maintain
Solution Approach 1:
The invention uses dynamics to maintain alignment by making the lower die plate assembly movable. As the upper die plate assembly moves along its circular pathway, the lower die plate assembly reciprocates horizontally through linear bearing and rail assemblies to track and maintain vertical alignment with the upper assembly, ensuring consistent alignment throughout the machining cycle
Solution Approach 2:
The invention resolves the alignment problem by introducing motion in another dimension. Instead of trying to maintain alignment through precise positioning in the horizontal plane only, the lower die plate assembly is given freedom to move horizontally through a separate degree of freedom, allowing it to follow the upper assembly's motion and maintain alignment dynamically
Data Source
AI summary
A rotary stamper includes an upper die plate assembly, a lower die plate assembly, and a support frame having a drive assembly that moves the upper die plate horizontally and vertically along a generally circular pathway while moving the lower die plate along a linear horizontal pathway. The upper die plate is vertically slidably connected to the lower die plate by way of one or more vertical rods that extend from the lower die plate assembly up through the upper die plate. In operation, the lower die plate matches the horizontal movements of the upper die plate as the latter is moved along its circular pathway. Concurrently, the upper die plate moves towards and away from the lower die plate. This maintains a substantially constant alignment between the die plates for carrying out a periodic machining operation on a moving web of material passing there between.