Press Mold Segmented Position-Limiting Mechanism
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Solution Overview
Problem
Conventional stamping die position-limiting mechanisms either require manual intervention and long die changeover times or are costly and prone to damage due to excessive compression of nitrogen gas springs, especially when dies are stacked.
Innovation Solution
A stamping die design incorporating a combination of a rigid storing limiter and an elastic nitrogen gas spring, with an elastic position limiter cushion and steel chains to facilitate automated die loading and prevent damage to elastic elements, allowing the rigid limiter to take over when the gas spring is compressed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a nitrogen gas spring is used as an elastic storing limiter to enable automated die loading, then die loading time is reduced and automation is improved, but when many dies are stacked the gas spring is compressed too much losing its limiting function and causing damage to elastic elements
Solution Approach 1:
The position-limiting mechanism is segmented into two independent components: a rigid storing limiter and an elastic nitrogen gas spring. The rigid limiter provides primary position limitation and supports stacking, while the gas spring provides secondary elastic limitation. This segmentation allows each component to perform its specialized function without compromising the other, enabling both automated loading and reliable position limiting.
Solution Approach 2:
The rigid storing limiter acts as a beforehand cushioning measure against the potential failure or excessive compression of the nitrogen gas spring. By having the rigid limiter in place, the system is prepared in advance to prevent damage to elastic elements even when the gas spring loses its function due to long working hours or excessive stacking.
2Reliability
If a rigid storing limiter is used for position limiting in storage, then position limitation is reliable, but manual adjustment is required and die changeover time is long
Solution Approach 1:
The invention merges the rigid storing limiter and the elastic nitrogen gas spring into a combined position-limiting system. The rigid limiter provides reliable position limitation while the gas spring enables automated loading by providing elastic compensation. This combination allows the system to achieve both reliable position limiting and reduced changeover time without requiring manual adjustment.
Solution Approach 2:
The nitrogen gas spring acts as an intermediary between the rigid storing limiter and the die. It provides elastic compensation that allows the rigid limiter to function reliably while enabling automated loading operations. The gas spring mediates between the rigid structure and the automated loading mechanism, eliminating the need for manual adjustment.
3Reliability
If a nitrogen gas spring with higher stiffness is used to prevent excessive compression during stacking, then position limitation is improved, but costs increase significantly and gas leak and failure risk increases
Solution Approach 1:
The position-limiting function is segmented between a rigid storing limiter and a standard-stiffness nitrogen gas spring. The rigid limiter handles the primary load-bearing and position-limiting function, allowing the use of a lower-stiffness, more cost-effective gas spring. This segmentation eliminates the need for expensive high-stiffness gas springs while maintaining reliable position limitation.
Solution Approach 2:
The rigid storing limiter serves as a durable, reusable component that can be easily replaced if needed, allowing the use of a more economical nitrogen gas spring with standard stiffness. The rigid limiter acts as a cost-effective backup that protects against the limitations of using cheaper gas springs.
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 automated die loading, reduces die changeover time, and lowers production costs by ensuring the rigid limiter can support the dies when the gas spring is degraded, while maintaining safety and preventing damage to elastic elements.
Implementation Method 1
at least one elastic storing limiter arranged between the upper die and the lower die. The elastic storing limiter may be a nitrogen gas spring.
Implementation Method 2
a direction-guiding guide pillar, arranged on the lower die, an upper die, connected with the lower die via the guide pillar
Data Source
AI summary
A press mold comprises lower mold (9), upper mold (3), working limiter (6) and rigid storing restrictor (2). The lower mold (9) and the upper mold (3) are coupled each other by guide post (1) having guiding function so that they can move relative to each other. The working limiter (6) and the rigid storing limiter (2) are located between the lower mold (9) and the upper mold (3). The press mold also includes at least one elastic storing limiter provided between the upper mold (3) and the lower mold (9).