Press Transfer Crossbar Kinematics With Energy-Storing Arms
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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 speed and acceleration, leading to increased wear and energy inefficiency.
Innovation Solution
A transfer system with two opposing fastening units, each equipped with a press transfer unit consisting of two movement arms and a crossbar, featuring energy-storing elements that store energy during acceleration phases to reduce peak drive torques and support the movement arms, allowing independent control of drive units to minimize vertical movement of the entire mass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a lifting device or lifting axis is used to move large masses with high speed and acceleration, then the workpiece can be transported between presses, but high drive torques with high energy consumption are required
Solution Approach 1:
The patent applies dynamics by replacing the static lifting axis with two articulated movement arms that perform combined horizontal and vertical movements. This dynamic configuration allows the system to optimize the transport path and reduce energy consumption while maintaining high transport speed between presses.
Solution Approach 2:
The patent implements counterweight principles by using the reciprocal motion of the two movement arms to balance each other. When one arm moves upward, the other moves downward, creating a counterbalancing effect that reduces the drive torque required and lowers energy consumption during workpiece transport.
2Productivity
If a lifting device or lifting axis is used to move large masses with high speed and acceleration, then the workpiece can be transported between presses, but high forces and high speeds act in guides leading to quicker wear
Solution Approach 1:
The dynamic articulated kinematics of the two movement arms distributes the mechanical loads more evenly across the guide elements compared to a rigid lifting axis. This reduces peak forces and speeds in individual guides, thereby decreasing wear and improving reliability while maintaining high productivity.
Solution Approach 2:
The patent segments the single lifting function into two separate movement arms, each with its own drive unit. This segmentation allows the load to be distributed across multiple guide elements and reduces the stress on any single guide, leading to reduced wear and improved system reliability.
3Use of energy by moving object
If two movement arms with independent drive units are used, then energy consumption is reduced, but the device complexity increases
Solution Approach 1:
The patent merges the functions of two movement arms into a single integrated press transfer unit that transports workpieces between presses. While each arm has an independent drive unit, their combined operation creates a coordinated system that achieves energy efficiency through counterbalancing, and the merging of functions reduces overall system complexity compared to separate lifting mechanisms.
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 reduces drive unit load and energy consumption by utilizing energy-storing elements to support movement arms, enabling more efficient energy use and smaller drive unit design, thereby reducing wear and improving energy efficiency.
Implementation Method 1
at least one energy-storing element is provided for each movement arm, which energy-storing element is formed and arranged in such a way that its force or a force component thereof points in the acceleration direction of the crossbar with or without workpiece
Data Source
AI summary
Proposed is a transfer system for presses, having at least two fastening units arranged opposite one another, wherein each of the fastening units in each case has a first fastening region. The transfer system further has a press transfer unit, consisting of two movement arms arranged opposite one another, as well as a crossbar connected thereto for receiving and for transporting, i.e. including setting down, a workpiece. Each of the movement arms has a first drive unit connected to the first fastening region, a first lever arm, a second drive unit, and a second lever arm. The first lever arm is connected at a first end thereof or between the first and a second end to the first drive unit, and at the second end thereof to the second drive unit. The second lever arm is rotatably connected at a first end thereof to the second drive unit, and is movably connected with a second end thereof to the crossbar. In addition, at least one energy-storing element is provided for each movement arm, which energy-storing element is formed and arranged in such a way that its force or a force component thereof points in the acceleration direction of the crossbar with or without. In an embodiment c1, a second fastening region is provided on the fastening unit, and the energy-storing element is connected directly or indirectly with a first end thereof to the second fastening region, and is fastened on a second end thereof at a specified region of the movement arm. In an additional or alternative embodiment c2, the energy-storing element is fastened with a first end to the first lever arm and with a second end thereof to the second lever arm.