9. Scientific Industrial Development View ScientificDevelopmentStrategyofChineseMachineToolIndustry
The scale and technical level of the machine tool manufacturing industry are constrained by market demand, resources, environment, industrial layout and national security. We must not simply formulate the development strategy of the machine tool industry by market, technology or output, but should balance the harmonious development of the machine tool industry and other industries from the height of resources, population and environment. We will embark on a new industrialization path with high technology content, good economic returns, low resource consumption, low environmental pollution, and full utilization of human resources.
Second, the technical development trend of machine tools
TechnologicTrendsofMachineTool
1. High-speed machine tooling HighSpeedMachining
With the wide application of industrial light alloy materials such as automobiles and aerospace, high-speed machining has become an important development trend of manufacturing technology.
High-speed machining has the advantages of shortening processing time, improving machining accuracy and surface quality, and is increasingly used in mold manufacturing and other fields. The high speed of the machine tool requires a new CNC system, a high-speed motor spindle and a high-speed servo feed drive, as well as optimization and weight reduction of the machine structure. High-speed machining is not just the equipment itself, but the integration of machine tools, tools, tool holders, fixtures and CNC programming techniques, as well as personnel quality. The ultimate goal of high-speed is to be efficient, and the machine tool is only one of the keys to achieving high efficiency. It is not all, and the production efficiency and efficiency are on the "knife tip".
2. Precision of the machine tool HighPrecisionMachining
According to the machining accuracy, the machine can be divided into ordinary machine tools, precision machine tools and ultra-precision machine tools, and the machining accuracy is doubled every 8 years. The positioning accuracy of CNC machine tools is about to bid farewell to the micron era and enter the sub-micron era. Ultra-precision CNC machine tools are marching toward nanometers. In the next 10 years, precision and high-speed, intelligent and miniaturization will merge into a new generation of machine tools. The precision of machine tools is not only an urgent need for industries such as automobiles, electronics, and medical devices, but also directly related to the modernization of defense industries such as aerospace, missile satellites, and new weapons.
3. From process compounding to complete processing Multi-operationandCompleteMachining
In the 1970s, the processing center opened the first step in the integration of multiple processes, and now it has developed into "complete processing", which is to complete the entire processing of complex parts on one machine. Complete machining is integrated through the process, and a part process is completed in one loading. Since the number of times of loading is reduced, the processing accuracy is improved, the process is highly reliable, and zero defect production is realized. In addition, the complete processing shortens the process chain and auxiliary time, reduces the number of machine tools, simplifies material flow, improves the flexibility of production equipment, and has a small total production area, making investment more efficient.
4. Machine tool information e-TowerforAutonomousManagement
The typical case of machine tool informationization is Mazak410H, which is equipped with an information tower to realize the self-management of the workplace. The tower has communication functions such as voice, text and video. Networking with the production planning and dispatching system to download work orders and machining programs. When the workpiece is cut, the machining process can be observed on the screen. The information tower reflects the working status and processing progress of the machine in real time and can be queried by mobile phone. The information tower simultaneously performs statistical analysis of work data and tool life management, as well as fault alarm display and online help elimination. Machine operation authority must be confirmed by fingerprint.
5. Intelligent machine tool - measurement, monitoring and compensation OnlineMeasurement, MonitoringandCompensation
Machine tool intelligence includes online measurement, monitoring and compensation. The position detection and closed-loop control of CNC machine tools is a simple application case. In order to further improve the machining accuracy, the circular motion accuracy of the machine tool and the spatial position of the cutter head can be compensated by inputting the numerical control system after the ballbar and laser measurement. Future CNC machine tools will be equipped with various miniature sensors to monitor the error caused by cutting force, vibration, thermal deformation, etc., and automatically compensate or adjust the working state of the machine to improve the working accuracy and stability of the machine.
6. Miniaturization of the machine tool Micro-machine and Micro-factory
With the rapid development of nanotechnology and MEMS, the development of machine tools for processing micro-parts has come to the fore. Micromachines are both fast and precise, with the smallest micromachines in the palm of your hand and a miniature factory in the suitcase. The operator controls the operation of the entire plant through the handle and monitor screen.
7. New parallel mechanism principle ParallelKinematicsMachine
The traditional machine tool rotates the X, Y, Z along the three coordinate axes in a Cartesian coordinate, and rotates A, B, and C around the three coordinate axes in series to form a desired tool motion trajectory. Parallel motion machine tools use various types of rod mechanisms to move the spindle components in space to form the required tool motion trajectory. The parallel motion machine tool has a series of advantages such as simple and compact structure, high rigidity and good dynamic performance, and has broad application prospects.
8. New process NewFabricationProcesses
In addition to metal cutting and forging, new machining processes and processes are emerging, and the concept of machine tools is changing. The field of laser processing is expanding. In addition to laser cutting and laser welding, laser hole machining, laser three-dimensional machining, laser heat treatment, and laser direct metal manufacturing are increasingly used.
Electrical processing, ultrasonic machining, laminating milling, rapid prototyping technology, and 3D printing technology all show their magic.
9. New structure and new materials NewContractionsandMaterials
The high speed and precision of the machine tool requires the simplification and light weight of the machine tool to reduce the negative impact of the machining inertia of the machine components on the machining accuracy and greatly improve the dynamic performance of the machine tool. For example, topology optimization of machine tool components by means of finite element analysis, design of "box-in-box" structure, and the use of hollow welded structures or lead alloy materials have begun to move from the laboratory to practical.
10. New design methods and means NewDesignMethodology
China's machine tool design and development tools should be transferred from 2D CAD to 3D CAD as soon as possible. 3D modeling and simulation is the foundation of modern design and the source of technological superiority. Based on this three-dimensional design, CAD/CAM/CAE/PDM integration is carried out to speed up the development of new products, ensure the smooth operation of new products, and gradually realize product lifecycle management.
11. Direct Drive Technology DirectDriveTechnology
In conventional machine tools, the motor and machine tool components are connected by means of coupling elements such as belts, gears and couplings to achieve the required movement or rotation of the components. "Machine" and "Electric" are separated. The direct drive technology integrates the motor and mechanical components into a mechatronic functional component, such as a linear motor, an electric spindle, an electric ball screw and a torque motor. Direct drive technology simplifies the machine structure and increases machine stiffness and dynamics, speed and machining accuracy.
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