Adjustable Spring Means for Press Brake Beam Stability
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Solution Overview
Problem
Press brakes used for bending sheet-like materials face instability and tilting issues due to asymmetric pressure distribution, particularly when the article is positioned off-center, leading to reduced maximum pressure and efficiency during symmetric pressing.
Innovation Solution
The integration of adjustable spring means with a switchable spring constant, connected between the beams or at their longitudinal ends, allows for increased pressure during asymmetric pressing to prevent tilting while reducing spring force during symmetric pressing, ensuring stability and maximum pressure application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If spring means are used to urge the beams away from each other during asymmetric pressing, then beam stability is improved and tilting is prevented, but the maximum pressure for folding is reduced and efficiency decreases during symmetric pressing
Solution Approach 1:
The spring constant of the spring means is made variable rather than fixed, allowing it to be adapted dynamically to different pressing conditions. During asymmetric pressing, a higher spring constant provides stability and prevents beam tilting. During symmetric pressing, a lower spring constant maximizes pressing efficiency and maximum pressure application.
Solution Approach 2:
The key parameter of the spring means (spring constant) is changed according to the pressing mode. By adjusting the spring constant between at least two different values, the system optimizes performance for different operational requirements: stability during asymmetric pressing and efficiency during symmetric pressing.
2Adaptability or versatility
If pressure is exerted asymmetrically to accommodate off-center article positioning, then adaptability is improved, but beam stability deteriorates causing tilting
Solution Approach 1:
The spring means acts as a counterbalancing element that provides a stabilizing force opposite to the asymmetric loading. By positioning the spring means at the longitudinal end of the beam opposite to the article position, it generates a counteracting moment that prevents beam tilting while allowing asymmetric article placement.
Solution Approach 2:
The system deliberately introduces asymmetric elements (spring means positioned at longitudinal ends) to counterbalance the asymmetric loading conditions. This asymmetric configuration of support elements compensates for the asymmetric article positioning, maintaining beam stability throughout the pressing operation.
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
This solution stabilizes the device during asymmetric pressing and maximizes pressure and efficiency during symmetric pressing, achieving uniform pressure distribution and high-quality bends.
Implementation Method 1
The spring means consists of a gas spring, having a chamber in fluid connection with a high pressure accumulator as well as having a fluid connection with a low pressure accumulator via a valve
Implementation Method 2
a chamber in fluid connection with a high pressure accumulator as well as having a fluid connection with a low pressure accumulator via a valve
Data Source
AI summary
The invention relates to a device for working sheet-like material, such as a press brake for bending steel sheet, which device comprises: - a frame (2); - two, relative to each other movable, substantially parallel beams (3,4) for working the sheet-like material (6), which beams (3,4) are connected to said frame (2); - driving means for driving said substantially parallel beams (3,4) away or towards each other; - at least one spring means (20;21), connected at a horizontal position along said beams (3,4) for urging said beams (3,4) away from each other; wherein said spring means (20,21) have a spring constant that is adjustable.