Vorschubantrieb für unstetige Bewegungsprofile*/Feed Drive for Discontinuous Profiles. Concept for motion generation in feed drives using an inertia-based momentum actuator

2018 ◽  
Vol 108 (05) ◽  
pp. 295-300
Author(s):  
P. Zahn ◽  
A. Lechler ◽  
A. Verl
Keyword(s):  
Dynamic Behavior ◽  
Experimental Verification ◽  
Multibody Simulation ◽  
Motion Generation ◽  
Feed Drive ◽  
Feed Drives ◽  
Contour Deviation

Das dynamische Verhalten von Vorschubantrieben hat wesentlichen Einfluss auf Qualität und Produktivität. Dabei sind konstante Bahngeschwindigkeit und eine möglichst kleine Abweichung der Bahn an Satzübergängen konträre Zielgrößen. Dieser Beitrag beschreibt ein neuartiges Antriebskonzept mit einem Zusatzaktor, welcher durch Impulseintrag das Verhalten einer Vorschubachse für unstetige Sollwertprofile verbessern kann. Anhand einer Mehrkörpersimulation wird das Prinzip demonstriert und beispielhaft experimentell verifiziert.   The dynamic behavior of feed drives is strongly influencing quality and productivity. However, a constant path velocity and a small contour deviation are contrary design targets. This paper shows a novel drive concept using an additional actuator. By introducing an additional momentum, the behavior of the feed drives can be improved for discontinuous path profiles. Based on a multibody simulation, this principle is presented followed by an experimental verification.

Analysis of the Rail Roughness Influence on Vehicle Dynamic Behavior by Means of Multibody Simulation

2011 ◽  
Vol 23 (1) ◽  
Author(s):  
Piotr Kurowski ◽  
Adam Martowicz ◽  
Tadeusz Uhl ◽  
Grzegorz Lasko
Keyword(s):  
Dynamic Behavior ◽  
Vehicle Dynamic ◽  
Multibody Simulation

Improvement of horizontal borer control system

2020 ◽  
Vol 2020 (7) ◽  
pp. 41-48
Author(s):  
Dmitriy Petreshin ◽  
Viktor Khandozhko ◽  
Andrey Dubov ◽  
German Dobrovolsky
Keyword(s):  
Control System ◽  
Machine Tool ◽  
Feed Drive ◽  
Feed Drives ◽  
System Improvement

The control system improvement of a machine-tool is considered. The necessity in control system updating is substantiated. There is shown a procedure for horizontal borer updating. A problem on adjustment of modern digital electrical feed drives is presented. A sample of electrical feed drive and NC device adjustment is presented.

Researches Regarding the Use of Fuzzy Controllers within CNC Feed Drives

2015 ◽  
Vol 772 ◽  
pp. 229-234
Author(s):  
Radu Eugen Breaz ◽  
Octavian Bologa
Keyword(s):  
Machine Tool ◽  
Fuzzy Controller ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Fuzzy Controllers ◽  
Feed Drive ◽  
Feed Drives ◽  
Simulation Based ◽  
Position Controller ◽  
Dc Servomotor

This paper presents some simulation based upon a dynamic model of a feed-drive within the structure of a CNC machine tool. A DC servomotor was considered as actuation device for the feed drive. For a given set of parameters for the position controller, two fuzzy types of fuzzy controllers were tested by means of simulation. The first fuzzy controller was a proportional one, with one input and one output, while the second one was a two variables one, with two inputs and one outputp.

A Study of the Stick-Slip Motion of Machine Tool Feed Drives

1969 ◽  
Vol 184 (1) ◽  
pp. 543-560 ◽  
Author(s):  
R. Bell ◽  
M. Burdekin
Keyword(s):  
Cast Iron ◽  
Simple Model ◽  
Machine Tools ◽  
Dynamic Measurements ◽  
Stick Slip ◽  
Feed Drive ◽  
Feed Drives ◽  
Stick Slip Motion ◽  
Lubricant Viscosity ◽  
Slip Motion

The phenomenon of ‘stick-slip’ oscillations of the feed drives of machine tools is an important problem in the design of certain types of machine tools. The factors contributing to this particular type of instability are studied both experimentally and analytically with the aid of a simple model based on dynamic measurements. The experimental work is restricted to a scraped cast iron-cup ground cast iron slideway interface. The principal experimental variables are lubricant viscosity and the natural frequency of the drive. The dynamic observations provide evidence and data that enable the use of a simple model rather than the more usual application of an involved analysis. The consideration of analytical and experimental results allows further understanding of the mechanism of feed drive instability to be developed.

Simulation and Experimental Investigation of Stiffness of the High Acceleration Linear Feed Drives

2010 ◽  
Vol 97-101 ◽  
pp. 3113-3119
Author(s):  
Ping Ma ◽  
Cheng Xiang Liao ◽  
Zhen Hui Chen ◽  
Gong Zhen
Keyword(s):  
High Speed ◽  
Dynamic Performance ◽  
Great Influence ◽  
Linear Motor ◽  
Current Loop ◽  
Linear Induction Motor ◽  
Feed Drive ◽  
Feed Drives ◽  
High Acceleration ◽  
Motorized Spindles

In high speed machining, the feed drives with high velocity and high acceleration are necessary to make full use of the capacities of the high speed motorized spindles. The linear motor feed drive eliminates any mid- transmitting mechanism, which cause achieved the high acceleration. In this paper, the GD-Ⅲ linear induction motor feed drive is introduced, and its controller is modeled and its stiffness has been investigated with simulation program MATLAB & SIMULINK. The influence of the parameters of the controller on the dynamic performance has also been analyzed. The simulation shows that the positional loop proportional gain kv, velocity proportional gain kp, velocity loop integral time constant Tn and the current loop proportional gain kpi have great influence on the dynamics of the linear motor feed drive. In the end, the simulation is verified by the experimental results.

Second Paper: An Investigation into the Mechanism of the Frictional Damping of Machine Tool Slideways

1969 ◽  
Vol 184 (1) ◽  
pp. 1088-1096 ◽  
Author(s):  
R. Bell ◽  
M. Burdekin
Keyword(s):  
Experimental Data ◽  
Steady State ◽  
Machine Tool ◽  
Instantaneous Velocity ◽  
Feed Drive ◽  
Feed Drives ◽  
Frictional Damping ◽  
Major Emphasis

The damping action of a plain slideway is considerably influenced by a number of parameters and is difficult to assess. It has been necessary, therefore, to obtain experimental data from adequately scaled experiments. The major emphasis is placed on the influence of polar additive lubricants as they offer considerable advantages in stabilizing feed drives at low feed speeds. This paper describes an investigation into the mechanism of the interaction between vibration in the direction of motion and the vibration normal to the plane of the slideway interface. Steady-state characteristics do not give an adequate guide to the damping action of a machine tool slideway. All the work discussed in this paper is restricted to vibration amplitudes that do not cause the instantaneous velocity of the feed drive to be reversed.

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