Static Press Guard for Irregular Die Openings
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Solution Overview
Problem
Existing safety devices for stamping presses are prone to breakage, require regular maintenance, and fail to accommodate complex dies with differential die spaces, posing a risk of operator injury, especially when inserting or removing sheets during the open cycle.
Innovation Solution
A static, adjustable guard that is not powered and independent of press cycles, with a skewed major axis relative to the width direction, accommodates irregular die spaces and prevents hand access while allowing sheet material to pass, featuring a transparent design for visibility and adjustable positioning to fit different dies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an automated guard mechanism is used, then operator safety is improved, but the mechanism is prone to breakage and requires maintenance
Solution Approach 1:
The guard system eliminates automated mechanisms by using the press head movement itself to control access to the die space. The static guard requires no power source, actuators, or control systems, making it inherently more reliable and maintenance-free while still providing automated safety through the press cycle
Solution Approach 2:
The invention extracts the complex powered mechanism from the guard system entirely, leaving only a simple static barrier. The safety function is achieved through the combination of the static guard and the natural press head movement, removing all components prone to breakage
2Ease of repair
If a static guard is used, then maintenance needs are reduced, but the guard cannot accommodate differential die spaces
Solution Approach 1:
The guard is positioned and oriented in a specific spatial relationship to the press heads and die space. By utilizing the three-dimensional movement of the press heads, the static guard can effectively cover variable die spaces without needing to be physically adjusted, as the relative positioning changes dynamically with the press cycle
Solution Approach 2:
The static guard serves multiple functions: it provides safety for various die configurations, allows sheet material passage, and adapts to different die spaces through its fixed positioning relative to the moving press heads. A single guard design accommodates multiple die types without requiring changeout
3Reliability
If switches and electrical features are used, then safety control is improved, but the components are prone to breakage and misuse
Solution Approach 1:
The invention replaces electrical control systems with a mechanical safety approach. The static guard physically prevents hand access to the die space, and the press head movement mechanically controls when the die space is accessible. This eliminates switches, sensors, and electrical controls that are prone to failure
Solution Approach 2:
The safety system uses the inherent mechanical movement of the press heads to control access to the die space. The guard remains static while the press cycle itself provides the control mechanism, eliminating the need for external electrical control systems
Data Source
AI summary
A stamping press having upper and lower dies to deform a sheet of material. The press has an irregularly shaped opening with greater and lesser height across the width of the press. The press has a guard to prevent inadvertent insertion of extremities between the dies when feeding a sheet for stamping. The guard is also irregular in that it may be skewed to preferentially cover greater parts of the opening and/or may have an irregularly shaped lower edge which can be registered with a like or similar edge of the lower die.