Elastically Mounted Forming Machine Vibration Control
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Solution Overview
Problem
Elastically mounted forming machines experience unwanted rigid body motions due to inertial forces and moments of inertia, leading to mechanical stress and dimensional tolerance issues, which existing compensation methods often require significant additional equipment and expenditure.
Innovation Solution
The method involves detecting and adapting the initiation time of the ram device's working stroke to match the instantaneous phase position of kinematic variables such as path, speed, or acceleration, thereby counteracting the rigid body motion and reducing tumbling or tilting motions without increasing equipment costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If compensating devices are installed to counteract inertial forces and moments of inertia, then the rigid body motion and vibration of the forming machine is reduced, but the device complexity and expenditure increase significantly
Solution Approach 1:
The system uses the forming machine's own drive system to generate counteracting inertial forces through phase-adapted control, eliminating the need for external compensating devices. The control device detects kinematic variables and adjusts the drive timing to self-compensate for vibrations and rigid body motions.
Solution Approach 2:
The invention changes the temporal parameter (initiation time) of the working stroke to adapt to the instantaneous phase position of the rigid body motion. By dynamically adjusting the phase relationship between the drive and the machine's natural motion, the system achieves vibration reduction without additional hardware.
2Stability of the object's composition
If the initiation time of the working stroke is adapted to counteract rigid body motion, then vibration and deflection are reduced, but the control complexity increases
Solution Approach 1:
The control device continuously detects kinematic variables (position, speed, acceleration) of the rigid body motion and uses this feedback to dynamically adjust the initiation time of the working stroke. This closed-loop control enables real-time adaptation to counteract vibrations while maintaining manageable system complexity through software-based control.
3Reliability
If phase-adapted control is used to reduce rigid body motion, then bearing lifetime increases and mechanical stress reduces, but the measurement and detection requirements become more stringent
Solution Approach 1:
The invention replaces complex mechanical measurement systems with sensor-based detection of kinematic variables. By using electronic sensors to detect position, speed, and acceleration, the system achieves the required measurement precision with simpler and more reliable components compared to traditional mechanical measurement methods.
Data Source
AI summary
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, wherein 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.