Study and Performance Improvement of the Drive Systems for a Class of Machine Tools (original) (raw)

Study of Spindle Drives for Machining Centers with Computer Numerical Control

Proceedings of the Technical University of Sofia, 2021

This paper presents the features of spindle drives for machining centers with computer numerical control. Based on formulated requirements, taking into account the possible mechanical operations main drives with DC and AC motors are selected. Mathematical modeling and computer simulation offer effective ways to study the drive systems in different dynamic and static modes of operation, especially when it is not possible or inconvenient to perform such tests in laboratory or industrial conditions. Using the MATLAB/SIMULINK software package, two types of DC drives are studied, namely: a dual-zone electric drive without adaptation and with adaptive control one. An AC drive is implemented which satisfies the necessary requirements. Some experimental results from studies of spindle drives with DC and AC motors are shown and discussed. Practical implementations of spindle drives in different mechanical operations are illustrated. The research held and the results obtained can be used in the development of such electric drives for the studied class of machine tools.

Study of Two-Coordinate Electric Drives for Turning Machines

2018

The basic requirements for feed drives of turning machines with digital program control are formulated in this paper. The offered methodology for selection of such drives takes into account the specific features of the technological process, the processed material, the tools used, as well as the mechanical gear type. Concrete examples with DC and AC motor drives are presented, illustrating the practical application of this methodology. A number of models for computer simulation of two-coordinate electric drive systems have been developed, allowing study at various reference speeds, positions, and loads applied to the motor shafts. Detailed testing has been carried out by means of computer simulation and experimental research. The results obtained can be used in the design and tuning of such types of two-coordinate drive systems with position control.

Methodology for Selection of Spindle Drives for Milling Machines

International Journal of Engineering and Computer Science, 2014

This paper describes a methodology for selection of spindle electric drives for milling machines with digital program control. The offered algorithm takes into account the technological process features, the tools used, the processed material, and the mechanical gear type. A concrete example has been presented, illustrating the practical application of this methodology. A number of models for computer simulation of electric drive systems with dual-zone speed regulation have been developed, allowing study at various reference speeds and loads applied to the motor shaft. The research held as well as the results obtained can be used in the development of such electric drives for the studied class of machine tools.

Performance Improvement of a Type of Milling Machines

Proceedings of the International Conference “Research and Development in Mechanical Industry", Vol. 1, pp. 218-227, Kopaonik, Serbia, 2013

Problems in modernization of a type of milling machines are discussed in this paper. Two additional controlled axes are applied, namely a table rotation (axis 4) and tilting of this table (axis 5). The machines under consideration are attributed to those with multi-coordinate electric driving systems. The main requirements for the drive characteristics of each coordinate axis are formulated. A number of models for computer simulation with various electric drives have been developed aiming at studying their dynamic and static regimes for the respective control algorithms. The experimental research carried out confirms good performance of the electric drives applied. The results of this study can be used in the design and set up of such multi-coordinate driving systems.

Methodology for Selection of Spindle Drives for Turning Machines

International Journal of Engineering Research and, 2018

This paper presents an approach to selection of spindle electric drives for a class of turning machines with digital program control. The offered algorithm takes into account the technological process features, the tools used, the processed material, and the mechanical gear type. Concrete examples for selection of spindle drives with DC and AC motors are presented, illustrating a practical application of the developed methodology. The research carried out as well as the results obtained can be used in the development of such electric drives with dual-zone speed regulation for the studied class of machine tools.

Studies on the Possibility of Using Linear Motors in Drive of the Machine Tools

ANNALS OF THE ORADEA UNIVERSITY. Fascicle of Management and Technological Engineering., 2010

Linear drive technologies are steadily expanded in various applications, especially in industry, where high precision electrical direct drive systems are required. This paper analyzes the advantages of using linear motors in kinematic chains of machine tools.

Optimization of the Drive System Choice for a Class of Drilling Machines

European Journal of Electrical Engineering and Computer Science

In this paper are analyzed and formulated the basic requirements for the drive system of a class of modernized drilling machines. On this basis, a methodology for optimal choice of the feed and spindle drives is offered. The respective algorithm takes into account the specific features of the technological processes, the processed materials, the tools used and their wear, as well as the mechanical gear types. Examples with DC and AC motor drives for the coordinate axes and the spindle are presented, illustrating the practical application of the offered methodology. The research carried out and the results obtained can be used in the development of drive systems for the studied class of machine tools.

Study of spindle drives for boring machines

2019

This paper examines the main requirements for the electric drive systems of a class of boring machines with digital program control. On this basis, a methodology for choice of the spindle drives is offered. The algorithm takes into account the specific features of the technological processes, the treated materials, the tools used and their wear, as well as the mechanical gear types. The experimental studies of the implemented electric drives for the spindle are presented and discussed. The research carried out and the results obtained can be used in the development of such drives for the studied class of machine tools.

Enhancements to the Work Ability of a High-Speed Motor Used in Machine Tools

TEM Journal

This paper presents a strategy for maximizing the effectiveness of high-speed spindle motors in manufacturing equipment. Using the ideal design of the stator winding geometry, as calculated by the Taguchi method, we were able to increase the maximum torque and efficiency. The rotor slot geometry was optimized using a response surface to raise the starting torque and reduce the starting current. The objectives of this investigation were to come up with a strategy for designing high-speed spindle motors so that they have better performance in terms of starting torque, maximum torque, efficiency, and starting current. Spindle motor temperature rise was the focus of the thermal measurements. Finally, a working spindle motor prototype was built and tested to verify the results of the Finite element analysis (FEA). The validity of the suggested model is demonstrated by a comparison between experimental measurements and finite element findings. The total percentage of mistakes was close to...

A method for determining the constant DC/AC motor power range and main technological spindle unit parameters

IOP Conference Series: Materials Science and Engineering, 2019

The article offers an original method for determining the constant DC/AC motor power range and basic technological parameters of the main spindle unit for multifunctional machine tools at the design stage. The method allows them to be determined, both in terms of the strength characteristics of the gearbox (or the strength characteristics of the system “machine-equipment-tool-work piece”) and in order to obtain the maximum spindle torque needed to ensure maximum machine productivity. The graphical interpretation of the method can be used both for designing new and for operating existing machines.