Linear Drives for Press Carriage Clamping Bars
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Solution Overview
Problem
Existing loading and unloading carriages for single-daylight presses face challenges with non-linear movement control due to pivoting levers and high mass acceleration, leading to inefficient and maintenance-intensive systems.
Innovation Solution
The implementation of linear drives, such as linear motors with a stator and rotor, or pneumatic, hydraulic, or electric servo lifting cylinders, which simplify control and reduce maintenance by transferring mass forces from clamping or suction bar rods to the carriage, allowing for precise positioning and adjustable length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If pivot levers with push rods are used to drive clamping or suction bar rods, then the device can achieve the required movement, but the drive motor must accelerate very large masses leading to high energy consumption and complex control
Solution Approach 1:
The patent replaces the conventional mechanical push rod system with a magnetic coupling system using permanent magnets. The magnetic field directly couples the drive motor to the clamping bar, eliminating the need for physical push rods and reducing the moving mass that the motor must accelerate. This substitution of mechanical transmission with magnetic field interaction resolves the contradiction by maintaining speed control while dramatically reducing energy consumption.
2Ease of operation
If pivot levers are used to move clamping or suction bar rods, then movement is achieved, but the non-linear movement makes controlling the device more difficult
Solution Approach 1:
The magnetic coupling system replaces the pivot lever mechanism, providing direct linear actuation of the clamping bar. This eliminates the non-linear motion characteristics of pivot levers and push rods, enabling precise and straightforward control through direct magnetic field modulation without complex mechanical transmission paths.
3Productivity
If pivot levers and push rods are used in the loading carriage, then clamping or suction bar rods can be actuated, but a large part of the mass must be accelerated leading to high inertial forces
Solution Approach 1:
The patent eliminates the heavy mechanical transmission components (pivot levers, push rods) by using a magnetic coupling system. The permanent magnets create a magnetic field that directly transmits force to the clamping bar, dramatically reducing the moving mass that must be accelerated while maintaining actuation speed and productivity.
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 provides technically and economically optimized drives with improved dynamics, reduced maintenance, and precise positioning capabilities, enabling efficient operation and retrofitting to existing systems.
Implementation Method 1
the linear drive consists of a linear motor with a stator and a rotor
Implementation Method 2
the stator with its permanent magnets is arranged on the crossbeam of the loading or unloading carriage
Data Source
Figure 1~3
AI summary
A loading or unloading carriage of a single-level press is provided with clamping or suction bar rods with parallel side beams (3) and a connecting cross beam (4) as well as with pivot levers (5) arranged on the side beams (3) each with a short power lever (6) and a function lever (7), wherein the power lever ends of each side beam (3) have an outer push rod (8) parallel to the side beam (3) and the function lever ends have an inner clamping or suction bar rod (9) parallel to the side beam (3);10) are articulated, wherein these can be pivoted parallel to the side rails (3) from rest positions approaching the side rails (3) into operating positions moved inwards towards the opposite side rail (3) via drives, the drives of which are technically and economically optimized, which is achieved by each drive having a slide (13) movable along the cross rail (4), on which an end of the clamping or suction bar rod (9; 10) is arranged and linear drives for pivoting the clamping or suction bar rods (9; 10) inwards and outwards are coupled to the slide (13).