A knowledge-centric CNC machine tool design and development process management framework

The main shortcomings of modern technological machine-tool complexes are shown. They are: the lack of consideration of individual consumer needs and their insufficient flexibility that do not take into account the trend of rapid changes in the production program. A concept for the development of metal-cutting machine tools based on the principles of the modular technology is proposed. The created machine tool complexes are designed to satisfy the individual needs of consumers, while the flexibility of production equipment should ensure the transition to the manufacture of new parts and the replacement of the technological processing scheme by changing the processing modes, readjustment and reconfiguration of machines; the development of machine tools should be carried out simultaneously with the improvement of the technology of processing parts. Technological complexes should be created by the layout synthesis using the element base that should contain two groups of functional modules, technological and service, and the service purpose of the machine should include the range of both the manufactured surface modules with their characteristics and the modules of technological support.

The highly sophisticated CNC machine tools of today, in the vast and diverse range found throughout the field of manufacturing processing, started from very humble beginnings in a number of the major industrialized countries. Some of the earliest research and development work in this field was completed in the USA and a mention will be made of the UK’s contribution to this numerical control development.

Modular design is one of the modern design methods used for the development of CNC machine tools, which can shorten the product design and manufacturing cycle, and improve the product quality and reliability. Module coding is one of the important steps in carrying out the modular design. Aiming at the effective application and management of the module codes in the enterprise informatization, this paper studied and developed the module coding system oriented on CNC machine tools. First, this paper analyzed the purpose of the module coding and put forward the basic rules of the module coding. Then, considering the characteristics of the modular design for CNC machine tools, this paper determined the coding scheme fit to the requirements of the machine tools enterprise. Next, based on the popular B/S structure and J2EE platform, this paper completed the function design and software development of the module coding system. At last, the development environment and example interface were introduced. The application of this module coding system in one machine tools enterprise proved that it was powerful to promote the application of modular design and the realization of the enterprise informatization.

With the continuous development of the national economy, the investment in infrastructure construction is increasing, especially for the entire society, the continuous improvement and accelerated development of its industrial level have brought huge economic development to the country. The development of industry is inseparable from the development of the real economy. Today, with the rapid development of the country, especially for the equipment manufacturing industry, earth-shaking changes have taken place. A large number of high-tech industrial enterprises have sprung up. They have left a strong mark in the history of world industrial development. The production and research of data machine tools has promoted the development of the equipment manufacturing industry. This article is based on the design of artificial intelligence-based CNC machine tools. Through a detailed introduction of its conceptual significance and related methods to strengthen the design, it aims to provide some reference and help.

Research on Morphology and Semantics of Industrial Design for CNC Machine Tools

The development and use of machine tools in historical perspective

In the development of robots and machine tools, in addition to conventional and serial structures, parallel mechanism-based kinematic structures have been used over a longer period of time. Aside from a number of advantages, the irregular shape and relatively small dimensions of the workspace formed by parallel mechanisms rank among the major weaknesses of their application. Accordingly, this fact has to be taken into consideration in the process of designing parallel mechanism-based robots or machine tools. This paper describes the categorization of criteria for the conceptual design of parallel mechanism-based robots or machine tools, resulting from workspace analysis as well as the procedure of their defining. Furthermore, it also presents the designing methodology that was implemented into the program for the creation of a robot or machine tool space model and the optimization of the resulting solution. For verification of the criteria and the programme suite, three common (conceptually different) mechanisms with a similar mechanical structure and kinematic characteristics were used.

In keeping with the development of machine tools with higher speed, more axes, and a greater degree of sophistication, thermal deformation is becoming an important factor in the precision of machine tools. It has been found that thermal error accounts for about 70% of the total error in machine tools. As such, oil coolers which absorb heat from heat generating parts with cold oil are being used to reduce the error caused by thermal deformation. The gas bypass type oil coolers used in ultra-precision (temperature accuracy within ±0.1°C) machine tools are simple in structure and precise in terms of their temperature control performance; however, they have a limitation as regards temperature control due to the instability of their performance under light load conditions. In this study, an oil cooler system equipped with dual electronic valves was developed to solve the problems of the single electronic valve system and achieve more precise temperature control. To verify the performance of the developed system, its performance under the operating conditions of rated load, DIN 8602 standard, and ISO/DIS 230-3 operational mode was compared and analyzed. The proposed oil cooler system is applicable to semiconductor equipment, ultra-precision injection molds, and ultra-precision machine tools, and improves the quality of the products.

Modeling of the Thermomechanical Process Effects on Machine Tool Structures

Success Story Cutting

AUTOMATION OF A MACHINE FACTORY USING CNC's WITH LARGE-CAPACITY BUBBLE MEMORIES AND A ROBOT

Environmental measures are urgently required to realize a society with a low environmental load. In response, various undertakings are being carried out in the field of machine tools, which is most critical in terms of requirement of energy-saving measures. The energy consumed when a machine tool is used to machine can be broadly divided into three categories: the “standby energy” to maintain the electrical devices operational when the machine is not operational; the “steady-state energy,” which is the fixed amount of energy required when the machine is in operation; and the “dynamic energy,” which varies with the machining conditions and other factors. Measures are necessary for each of these energy categories to reduce energy consumption. This paper describes an example of an energy-saving study undertaken for a machine tool used for machining gears; a new processing method called skiving was developed to consolidate work processes.

A review of parallel kinematic machine tools: Design, modeling, and applications

This study relates to a rule-based cutting condition recommendation system for the implementation of intelligent machine tools. For cutting processes, information on the configuration and material of the work-piece, machine tools, and other related tools are essential, similarly as machine tools operators determine appropriate cutting conditions using their own experience along with such details. The development of computer technology has enhanced the intelligence of machine tools, allowing them to automatically calculate and determine relevant cutting data. In this study, a rule-based cutting condition recommendation system is implemented and installed on an open controller for intelligent machine tools. The cutting conditions utilized were provided by tool-makers. The conditions were recommended by classification into high-speed and common speed machining. Efficiency and accuracy has been improved by the implemented system, which is expected to be a key technology for the development of intelligent machine tools.

Five-axis machine tools with two additional rotational degrees of freedom provide more flexibility in tilting the tool axis to various orientations than conventional three-axis machine tools do, subsequently increasing the cutting efficiency and avoiding tool collision against a workpiece. Also, the risk of programming error can be avoided by simulating the five-axis Numerical Control (NC) code before real machining. This work presents a five-axis machine tool cutting simulation system with a nonorthogonal linear axis configuration. A window-based cutting system written by Borland C++ Builder and OpenGL is also developed based on the kinematics model of the proposed machine tool. Furthermore, implementing and verifying the five-axis NC code demonstrates the effectiveness of the proposed scheme.