Adjustable Stamping Punch Die for Coil Spring Load Control
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Solution Overview
Problem
Conventional die-pressing punches lack the ability to adjust the initial urging force of the coil spring according to the material of the workpiece, requiring frequent adjustments of the striker height, which complicates the die-pressing process.
Innovation Solution
A die-pressing punch with a hollow cylindrical punch guide, a non-rotatable punch body, and a rotatable punch head that can be adjusted via a screw-fitting mechanism, allowing the initial load of the urging member to be adjusted by changing the compressed amount of the coil spring, using a joint member and operable member to switch between rotatable and non-rotatable states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the initial urging force of the coil spring is fixed, then the structure is simple, but the working load cannot be adjusted according to workpiece material
Solution Approach 1:
The punch body is made rotatable relative to the punch guide, allowing the initial compression amount of the coil spring to be dynamically adjusted by rotating the punch body to different angular positions. This transforms a static spring compression system into a dynamic adjustable one, enabling adaptation to different workpiece materials without changing the spring itself.
Solution Approach 2:
The coil spring is pre-compressed to a specific amount during the setup phase by rotating the punch body to the desired position before operation. This preliminary adjustment of the spring compression amount allows the system to be optimized for different workpiece materials in advance, and once set, the punch body is fixed in position to maintain the predetermined working load.
2Adaptability or versatility
If the striker height is adjusted frequently to match workpiece material, then the working load can be optimized, but operational efficiency decreases
Solution Approach 1:
The system allows preliminary adjustment of the punch body rotation angle to set the appropriate initial spring compression for different workpiece materials before production. Once optimized, the punch body position is fixed, eliminating the need for frequent adjustments during operation. This separates the setup phase (where adaptation occurs) from the production phase (where efficiency is maintained).
Solution Approach 2:
Instead of adjusting the striker height for each material type, the system creates a corresponding relationship between punch body rotation angles and optimal working loads for different materials. Each rotation angle position effectively copies or represents a specific material requirement, allowing quick switching between materials simply by rotating to the predetermined angle position.
3Adaptability or versatility
If the punch body is made rotatable for adjustment, then the initial load can be changed, but the punch body may rotate unintentionally
Solution Approach 1:
A locking mechanism acts as an intermediary between the punch body and the punch guide, preventing unintentional rotation while allowing intentional adjustment. The locking mechanism engages with the punch body at specific angular positions, providing stable locking during operation but disengaging when adjustment is needed, thus mediating between the conflicting requirements of rotatability and stability.
Solution Approach 2:
The punch body design includes self-locking features that automatically engage at predetermined angular positions during rotation. When the punch body is rotated to a desired position, the self-locking mechanism automatically locks it in place, eliminating the need for separate manual locking operations and ensuring stability without interfering with the adjustment process.
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 the setting of a working load according to the material of the workpiece without adjusting the striker height, improving operational efficiency by simplifying the adjustment of the initial load and allowing for precise control of the die-pressing process.
Implementation Method 1
a spring (urging member) which urges the roller unit downward
Implementation Method 2
an initial load adjusting section which adjusts an initially-compressed amount of the spring
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
Provided are a die-pressing punch, a die-pressing die set and a beveling method each of which can improve operational efficiency of die-pressing such as beveling by adjusting an initial load of a coil spring according to a material of a workpiece. A punch body 25 is provided inside a punch guide 17 vertically movably, and a punch head 33 is provided at an upper end of the punch body 25 by being screw-fitted therewith. A coil spring 49 is disposed, inside the punch guide 17, between the punch body 25 and an upper free ball bearing 41. A ring-shaped joint member 51 is provided on a side of an outer circumferential surface of the punch body 25 and on an upper side of the punch guide 17, and the joint member 51 is jointed with the punch head 33 non-rotatably about an axial center C with respect to the punch guide and non-removably therefrom. An operable member 63 switches the joint member 51 between the rotatable state and the non-rotatable state, about the axial center C with respect to the punch guide 17.