Author: Changzhou Institute of Mechatronic Technology Liu Jiang
In 2011, many domestic experts in the national key project “High-end CNC machine tools and basic equipment†grinding in Shanghai talked about the improvement of the competitiveness of domestic CNC machine tools in improving the accuracy and stability of machine tools. Deep technical problems in the development of high-end grinding machines. Such as the configuration technology of the composite grinding machine, the design of the highly reliable automatic wheel replacement system, and the control method of the grinding process under the requirements of multiple processes. Grinding machine is one of the most technically intensive products in CNC machine tools. The grinding mechanism is complex and difficult to control, and the whole process of grinding process directly affects the accuracy, quality, efficiency and cost of the workpiece. The quality of the workpiece is also directly affected. To the life and reliability of mechanical products. This requires a high-tech content of the CNC grinding machine, and its key technologies and manufacturing processes are difficult to replicate. Grinding machine is the core equipment for the efficient and precise processing of key parts of aviation equipment, satellite applications, rail transit equipment, offshore engineering equipment, intelligent manufacturing equipment, etc., which are clearly pointed out by the Ministry of Industry and Information Technology recently on accelerating and cultivating the development of strategic emerging industries. .
In recent years, foreign grinding technology has made remarkable progress and development. High grinding wheel linear speed, high precision feed rate, high speed and high power spindle, high rigidity bed, integration of process and machine tools. For example, the VERTICAL MATE SERIES series of CNC vertical composite grinding machines (see Figure 1) produced by Sun Machinery of Japan Mori Seiki has high-efficiency compound grinding function.
Figure 1 shows the working conditions of the machine tool. The machine can machine the internal grinding of the inner and outer diameters, the end surface, the cam surface and the tooth surface of the coupling in one clamping, achieving unprecedented process innovation. The DD motor is loaded on the workpiece spindle to achieve 0.000 1° indexing control. After the workpiece spindle is indexed, it is braked by the motor to ensure the precision of machining.
figure 1
Fig. 2 is a new type of high-performance machine tool with a basic structure for loading a DD motor on a spindle and realizing machining accuracy with a conventional machine tool. The main functions are equipped with double and multi-position positioning brick towers, which can be grounded by 0° positioning and 22.5° and multi-point positioning. The grinding wheel shaft adopts the connection method of HSK-A100, the maximum power output is 11.0kW, and the grinding wheel shaft and the main shaft are connected by the clamping force of 4T to realize the low vibration and high rigidity of the grinding wheel shaft to provide the grinding precision. It is equipped with an on-line measuring device that can measure the inner, outer diameter and plane. The key is that it introduces the concept of multi-tool machining in the machining center tool magazine, and uses the ATC tool magazine with six grinding wheel shaft grinding tools. The standard configuration (see Figure 3) makes it a highly versatile and efficient grinding machine.
figure 2
image 3
Composite Decking,Decking Timber ,Composite Lumber ,Trek Deck
Wood Plastic Composite Flooring Co., Ltd. , http://www.china-wpc-decking.com