Rotary Punching Tool Layout for Flexible Moving-Web Patterns
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Solution Overview
Problem
Existing devices for punching or perforating moving webs of material lack the ability to easily change the arrangement or shape of the punched parts, making it time-consuming and inefficient to modify the punching patterns.
Innovation Solution
A device with multiple punching tools mounted on a drive shaft, allowing for adjustable positioning and independent control of each tool, enabling different punching patterns and shapes by varying the distance between tools and their alignment with an impression cylinder, and using magnetic strips with interchangeable dies to change the punching profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional punching devices with fixed tooling are used, then structural simplicity is maintained, but the ability to change punching patterns and shapes becomes time-consuming and complex
Solution Approach 1:
The punching tools are mounted on a rotatable drive shaft rather than being fixed in position. This allows the tools to be dynamically repositioned by rotating the shaft to different angular positions, enabling flexible punching patterns without complex mechanical adjustments. The tools can be quickly reconfigured by changing their angular positions on the rotating shaft.
Solution Approach 2:
The punching tooling is divided into multiple independent punching tools that can be individually positioned on the drive shaft. Each tool can be independently adjusted and positioned, allowing selective activation and arrangement of different punching elements to create various patterns and shapes without reconfiguring the entire tooling system.
2Adaptability or versatility
If multiple punching tools are added to enable pattern changes, then versatility improves, but the device complexity and adjustment requirements increase
Solution Approach 1:
The drive shaft rotation provides a dynamic and intuitive method for positioning multiple punching tools. Instead of complex mechanical adjustments, operators can simply rotate the shaft to desired angular positions, making tool positioning straightforward and efficient while maintaining the capability to use multiple punching tools simultaneously.
Solution Approach 2:
The rotatable drive shaft serves multiple functions: it holds multiple punching tools, provides positioning mechanism, enables pattern selection through rotation, and coordinates the punching action. This single component performs what would otherwise require multiple separate adjustment mechanisms, simplifying operation while maintaining versatility.
3Manufacturing precision
If fixed tooling positions are used, then device simplicity is maintained, but the precision and control over punching distances and speeds are limited
Solution Approach 1:
The rotatable drive shaft enables dynamic positioning of punching tools at precise angular intervals. By controlling the rotation position and speed of the shaft, the system achieves precise control over punching distances and timing without requiring complex fixed positioning mechanisms. The angular position on the shaft provides inherent precision for spacing control.
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
Enables quick and efficient changes in punching patterns and shapes without mechanical adjustments, allowing for precise control over punching distances and speeds to accommodate various material web sections, thus simplifying the process of punching or perforating.
Implementation Method 1
magnetic strips with interchangeable dies to change the punching profiles
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The punching device has two punching units (1a,1b) that are provided along movement direction (A) of sheet material (17). Each punching unit comprises two punching tools (2,2') which work together with a drivable counter-pressure cylinder (5). The punching tools are fixed along longitudinal axis (3a) of drive shaft (3) in different working positions. A punched tape is detachably fixed on periphery of each punching tool. The drive shaft is driven independently with respect to counter-pressure cylinder.