Forming Machine Stroke Timing for Wobble and Tilt Compensation
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Solution Overview
Problem
Elastically mounted forming machines experience wobbling and tilting movements due to inertial forces and moments of inertia, leading to increased mechanical stress and non-compliance with dimensional tolerances, which existing compensation methods attempt to address with increased equipment expenditure.
Innovation Solution
A method that records and adjusts kinematic variables of the forming machine's rigid body movement to counteract inertial forces and moments of inertia by synchronizing the initiation of the working stroke with the instantaneous phase position of these variables, using sensors to detect and control the movement, thereby reducing the amplitude of wobbling or tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If compensation devices with movable mass parts are attached to the forming machine, then the rigid body movement and vibrations are reduced, but the device complexity and equipment expenditure increase significantly
Solution Approach 1:
The forming machine uses its own drive system to generate counteracting inertial forces during normal operation, rather than requiring separate compensation devices. The control unit coordinates the drive and ram device to automatically compensate for vibrations and rigid body movements during forming operations.
Solution Approach 2:
The invention changes the operational parameters of the drive system, specifically timing the initiation of the working stroke to specific phases of the drive cycle and adjusting the drive speed, to generate inertial forces that counteract unwanted movements without adding physical compensation mass.
2Stability of the object's composition
If the initiation time of the working stroke is precisely synchronized with the phase position of kinematic variables, then the inertial forces counteract the rigid body movement and reduce vibrations, but the control complexity increases
Solution Approach 1:
The control unit continuously monitors the phase position of the drive and adjusts the initiation timing of the working stroke based on real-time kinematic variables, creating a closed-loop control system that automatically optimizes vibration compensation during operation.
3Manufacturing precision
If additional sensors and control systems are installed to detect and counteract rigid body movement, then the manufacturing precision improves, but the device complexity and cost increase
Solution Approach 1:
The forming machine utilizes its existing drive system components and operational parameters to achieve vibration compensation and improved precision, rather than requiring additional external sensors and control equipment. The drive system itself generates the counteracting forces needed for precision forming.
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 approach reduces the deflection of the forming machine, allowing for faster cycle sequences and increased service life of bearings, without the need for significant additional equipment, enabling more precise and efficient operation.
Implementation Method 1
an elastically mounted forming machine (1) with respect to a supporting foundation (9)
Data Source
Figure 1~2
Figure 3
Figure 4a
AI summary
The invention relates to a method for operating an elastically mounted forming machine which is path-bound or force-dependent, in which method a working stroke of a ram device operatively connected to the drive is initiated by means of a drive, and a predefined forming process is carried out on a workpiece by moving the ram device during said working stroke, in particular due to the interaction of an upper tool located on the ram device with a lower tool located on a tool table, wherein the inertial forces and/or moments of inertia occurring during operation owing to the initiation of the working stroke and/or owing to an imbalance in the drive are at least partially compensated. The method according to the invention is characterised in that at least one kinematic variable (s(t),v(t),a(t)) of a rigid body motion of the elastically mounted forming machine is detected during the operation thereof, wherein the time at which the working stroke is initiated is adapted to an instantaneous phase position of the at least one kinematic variable (s(t),v(t),a(t)) of the rigid body motion in order to generate inertial forces and/or moments of inertia so as to counteract the rigid body motion of the forming machine.