Press Transfer Crosspiece Motion With Counterweight Energy Storage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing transfer systems for presses require high drive torques and energy consumption due to the need to move large masses with high speeds and accelerations, leading to increased wear and energy inefficiency.
Innovation Solution
A transfer system with two interconnected lever arms, each equipped with independently controllable drive units, and an energy-storing element that acts in the acceleration direction to reduce peak drive torque requirements, allowing for superimposed vertical and horizontal movements without a dynamic lifting axis, thereby supporting the movement arms and relieving the drive units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a lifting device or lifting axis is used to move the moving arm vertically, then vertical movement is achieved, but high drive torques and energy consumption are required due to moving large masses at high speeds
Solution Approach 1:
The patent applies a counterweight cylinder that acts in the vertical direction to compensate for the weight of the moving arm and workpiece. This counterweight system reduces the drive torque required by the lifting axis, thereby lowering energy consumption while maintaining high vertical movement speeds
2Productivity
If high drive torques are used to move large masses with high accelerations, then high speeds and accelerations are achieved, but high forces act on the guides leading to faster wear
Solution Approach 1:
The counterweight cylinder compensates for gravitational forces on the moving arm and workpiece, reducing peak forces during acceleration and deceleration. This force reduction decreases wear on the guide elements while maintaining high transfer speeds and productivity
3Adaptability or versatility
If a dynamic lifting axis is used to achieve vertical movement, then movement flexibility is achieved, but the system requires high energy input and complex drive elements
Solution Approach 1:
The counterweight cylinder provides gravitational compensation for the dynamically moving arm, reducing the energy required by the lifting axis while preserving the system's movement flexibility and adaptability to different workpiece positions
4Productivity
If the lifting axis moves large masses with high accelerations, then high productivity is achieved, but high drive torques increase the size and weight of drive units
Solution Approach 1:
By compensating for the weight of the moving arm and workpiece, the counterweight cylinder reduces the drive torque requirements, enabling the use of smaller, lighter drive units while maintaining high productivity and transfer rates
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 achieves energy efficiency by reducing drive torque peaks, enabling smaller, lighter drive units, and saving energy through the reuse of stored energy during movement phases, resulting in a more efficient and cost-effective transfer process.
Implementation Method 1
at least one energy-storing element is provided for each movement arm, designed and arranged such that its force, or a force component thereof, points in the acceleration direction of the crosshead
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a transfer system for presses, comprising at least two securing units arranged opposite one another, wherein each of the securing units has a respective first securing region. The transfer system also has a press transfer unit, consisting of two movement arms arranged opposite one another, as well as a connected crosspiece for receiving and for transporting, i.e. including setting down, a workpiece. Each of the movement arms has a first drive unit secured to the first securing region, a first lever arm, a second drive unit and a second lever arm. The first lever arm is connected to the first drive unit at its first end or between the first and a second end, and connected to the second drive unit at its second end. The second lever arm is rotatably connected to the second drive unit at its first end, and moveably connected to the crosspiece by its second end. In addition, at least one energy-storing element is provided for each movement arm, which is designed and arranged in such a way that its force or a force component thereof points in the acceleration direction of the crosspiece with or without the workpiece. In one embodiment c1, a second securing region is provided on the securing unit and the energy-storing element is directly or indirectly connected to the second securing region by its first end and secured to a predefined region of the movement arm at its second end. In an additional or alternative embodiment c2, the energy-storing element is secured to the first lever arm by a first end and to the second lever arm by its second end.