Manual Press Safety Power Assist With Mechanical Pinch Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional safety systems for metal working presses, such as optical sensors and pneumatic interlock mechanisms, are expensive, prone to false detections, and add complexity, making them unsuitable for dirty manufacturing environments.
Innovation Solution
A safety power assist system for manual presses that employs a mechanical pinching arrangement with a spring-activated switch and automatically powered actuator, allowing manual control and adjustment, eliminating the need for optical detectors and reducing complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical sensors or light curtains are used for safety detection, then safety monitoring capability is improved, but cost increases and false detection occurs in dirty environments
Solution Approach 1:
The patent replaces optical detection systems with a mechanical detection system. A mechanical sensor directly contacts the workpiece to detect its presence and thickness, eliminating the use of light curtains and optical sensors that are susceptible to false detections from dirt and contamination in the manufacturing environment.
Solution Approach 2:
The mechanical sensor system uses simple, durable mechanical components that are less expensive than optical systems and do not require complex calibration or maintenance. The mechanical switch and contact-based detection method provide reliable safety monitoring without the high cost and fragility of optical components.
2Reliability
If pneumatic interlock and retraction mechanism is used, then safety control is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the complex pneumatic interlock and retraction mechanism from the press system. Instead of using foot-operated pneumatic valves and cylinders, the invention employs a simplified mechanical switch system that directly detects workpiece presence and controls press operation without requiring additional pneumatic components.
Solution Approach 2:
The mechanical switch system performs multiple functions: it detects workpiece presence, verifies proper material loading, and controls press operation cycles. This multi-functional approach replaces the separate pneumatic interlock and retraction mechanisms, reducing overall system complexity while maintaining safety control.
3Ease of manufacture
If mechanical pinching arrangement with spring-activated switch is used, then cost and durability are improved, but automation level decreases
Solution Approach 1:
The mechanical switch system is self-actuating through direct contact with the workpiece. When the workpiece is properly positioned and the press operates, the mechanical components automatically engage and disengage the switch without requiring external pneumatic actuators or complex control systems, achieving automation through simple mechanical self-service.
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
The system is more durable, cost-effective, and resistant to false obstacle detection, providing reliable safety without the drawbacks of traditional systems, enabling efficient and robust operation in dirty environments.
Implementation Method 1
A switch is provided which must be activated by compressing a spring beyond a predetermined pinching force
Implementation Method 2
switch activation causes an automatically powered actuator to advance a workpiece-contacting punch or tool
Data Source
AI summary
A safety power assist for a manual press is provided. In another aspect, a press includes a tool, a manual actuator, a switch and an automatically powered actuator. A further aspect of the present press employs a spring which must be compressed beyond a predetermined pinching force before a switch is activated, where switch activation causes an automatically powered actuator to advance a workpiece-contacting punch or tool.