Interchangeable Stripping Modules for Flat Punched Part Ejection
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Solution Overview
Problem
Existing devices for breaking out flat workpieces from sheets of material often result in jamming or tilting issues, disrupting the process due to the need for cumbersome carpentry work and limited flexibility in using different materials and hardness levels.
Innovation Solution
A device with interchangeable stripping modules, featuring a module nose that is partially flexible and made of plastic with beveled or rounded sliding surfaces, which reduces the clear width of the die opening and applies compressive forces to facilitate the breakout process, allowing for curvature and centrifugal ejection of workpieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional die creation with carpentry work is used, then the die structure is fixed and stable, but the manufacturing complexity increases and flexibility decreases
Solution Approach 1:
The die is divided into a permanent die body and interchangeable breakout modules. The breakout modules can be easily swapped out and replaced with different materials and hardness levels, eliminating the need for complex carpentry work while maintaining flexibility.
Solution Approach 2:
The standardized breakout modules serve multiple functions: they can be made from different materials (steel, hardened steel, plastic) and hardness levels to handle various workpiece materials, making the die system universally applicable to different stripping tasks.
2Reliability
If the die opening clear width is reduced by breakout modules, then workpiece jamming is prevented, but the opening size for material passage is reduced
Solution Approach 1:
The breakout modules are designed to be compressible under the action of the stripping tool, allowing the die opening to dynamically adjust its width. During normal operation, the modules maintain a reduced clear width to prevent jamming, but under compression they yield to allow workpiece passage.
Solution Approach 2:
The clear width of the die opening is changed from a fixed dimension to a variable parameter that adjusts based on the applied force. The breakout modules transition from a state that restricts width (preventing jamming) to a compressed state that allows passage.
3Force
If stripping pins apply pressure to break out workpiece, then the breakout force is sufficient, but workpiece curvature and tilting may occur
Solution Approach 1:
The breakout modules provide localized support surfaces at specific positions within the die opening. These surfaces guide the workpiece edges and distribute the breakout force more evenly, preventing uncontrolled tilting and curvature while maintaining sufficient breakout force.
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
Ensures a trouble-free breakout process by eliminating the need for complex die creation, allowing for the use of various materials and hardness levels, and preventing jamming through controlled curvature and ejection of workpieces.
Implementation Method 1
The module nose is at least partially flexible with respect to the insert and is made of plastic
Implementation Method 2
It features a beveled and/or rounded sliding surface
Implementation Method 3
the stripping tool has stripping pins or strips with which pressure can be applied to the workpiece
Implementation Method 4
the shear edge forms a waste length towards a bearing surface of the module nose
Implementation Method 5
the workpiece is flung downwards in a centrifugal effect
Data Source
Figure 1a~1d
Figure 2~4
AI summary
The invention relates to a device for separating a workpiece (3) from a material sheet (2) via an opening (4) of a matrix (1) by means of a separation tool (5), wherein the matrix (1) has a recess (22), in which recess (22) a separation module (9.1 - 9.4) can be introduced, wherein the separation module (9.1 - 9.4) consists of an insert (10) and a module projection (11), wherein the insert (10) has a surface (16) and a shearing edge (17), wherein the shearing edge (17) forms a drop length (18) to a contact surface (12) of the module projection (11), and wherein the drop length has a height (h) of 0.8 mm to 1.8 mm, and preferably of 1.5 mm.