Precision Cutting Tool Spring Pack Pressure Accumulator
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Solution Overview
Problem
Existing press technologies for precision cutting face challenges with uncontrolled force generation, high operational costs due to hydraulic circuits, and dependency on specific drive elements, limiting their versatility and efficiency in achieving precise cutting operations.
Innovation Solution
A precision cutting tool with a mechanically acting spring pack supported by a pressure accumulator and check valve, allowing for variable force characteristics and autonomous operation, eliminating the need for hydraulic drive elements and enabling use in any press kinematics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If hydraulic drive elements are used for precision cutting, then cutting precision is improved, but device complexity and cost increase due to hydraulic circuits and valves
Solution Approach 1:
The patent extracts and removes the hydraulic drive elements and circuits from the precision cutting tool, replacing them with a mechanically acting spring pack that is supported by a pressure accumulator and check valve. This eliminates the complex hydraulic infrastructure while maintaining the necessary force application for precise cutting.
Solution Approach 2:
The patent replaces the hydraulic mechanical system with a purely mechanical force generation system using spring packs, pressure accumulators, and check valves. This substitution eliminates the need for hydraulic fluid, pumps, and control valves, significantly reducing device complexity while maintaining cutting precision.
2Device complexity
If uncontrolled spring elements are used for force generation, then device complexity is reduced, but manufacturing precision deteriorates due to uncontrollable pressing force
Solution Approach 1:
The patent transforms the static, uncontrolled spring element into a dynamic, controllable force generation system. The pressure accumulator and check valve enable controlled preloading of the spring pack, allowing the pressing force to be adjusted and maintained at optimal levels for precise cutting operations.
Solution Approach 2:
The patent changes the parameters of the spring pack by introducing controlled preloading through the pressure accumulator system. This allows the force characteristics of the spring pack to be varied and optimized, transforming an uncontrolled element into a precisely controllable force source that maintains cutting precision.
3Device complexity
If passive spring elements are used, then device complexity is reduced, but productivity deteriorates due to lack of controlled motion and scrap removal
Solution Approach 1:
The patent enables the cutting tool to serve itself by integrating the pressure accumulator and check valve system that automatically controls the spring pack preloading and scrap removal. The system uses the press movement itself to trigger the controlled force application and scrap ejection, eliminating the need for external active control mechanisms.
Solution Approach 2:
The patent implements preliminary action by preloading the spring pack through the pressure accumulator before the cutting operation begins. This controlled preloading ensures that the optimal pressing force is already in place when cutting starts, and the system is pre-configured for automatic scrap removal, improving operational efficiency.
4Manufacturing precision
If hydraulic circuits are used for active press tool control, then manufacturing precision is improved, but ease of manufacture deteriorates due to significant effort and high costs
Solution Approach 1:
The patent extracts and removes the hydraulic circuit infrastructure from the active press tool, replacing it with a mechanically acting spring pack system supported by a pressure accumulator and check valve. This eliminates the need for hydraulic pumps, reservoirs, and complex valve systems, significantly easing manufacturing and implementation.
Solution Approach 2:
The patent replaces expensive, complex hydraulic components with simpler, more economical mechanical elements. The spring pack, pressure accumulator, and check valve system is inherently simpler to manufacture and implement than hydraulic circuits, reducing both initial costs and maintenance requirements while maintaining cutting precision.
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 solution enables precise cutting with reduced effort and cost, achieving a smooth cut portion of over 70% of the vertical surface, high stroke rates, and independence from press drive elements, making it more efficient and cost-effective compared to conventional tools.
Implementation Method 1
a pressure accumulator and a check valve connected to the pressure accumulator
Implementation Method 2
a check valve connected to the pressure accumulator
Implementation Method 3
The lower tool part (15) comprises a mechanically acting spring pack (26)
Data Source
AI summary
A method for precision cutting of workpieces using a press which includes a press frame, in the press opening of which press frame a press ram, that works against a press table, is movably driven, wherein at least one of the press tools is formed as a cutting tool that includes a cutting punch, a downholder, a cutting die and a counter support. The cutting tool operates as a precision cutting tool. A lower tool part of the cutting tool includes a controlled retaining module that retains the counter support in a certain press ram position to enable ejecting the scrap.