There are many kinds of CNC lathe processing; from the major categories, there are special CNC lathes for processing, and there are general-purpose CNC lathes for processing; from the processing of varieties, there are processing lathes of CNC lathes for machining CNC milling machines, machining centers, and machining axes. CNC lathes, turning centers, CNC grinding machines, etc.; from the control requirements of CNC lathe processing, there are single-axis numerical control CNC belt polishing machine, there are five linkage CNC cutting machine, CNC hob grinding; from the control of the complex On the points, there are simple numerical control, there are multi-channel numerical control; from the drive mode points, there are stepping motors, a DC servo motor, an AC synchronous servo motor, an AC asynchronous servo motor, a linear motor; from the spindle drive method Points, there is a DC spindle motor, AC spindle motor, AC spindle; from the position feedback mode, there are full closed loop feedback, semi-closed loop feedback, open loop control and so on.
The good flexibility of CNC lathe processing, high adjustment, and high machining accuracy have long been the focus of automakers. In the 1960s, they began to enter the auto parts manufacturing sector. Due to its high cost, system functions and efficiency are not ideal, and it has not been widely used. Entering the 1990s, with the intensification of market competition; multi-variety production to meet the diversified needs of the market to the maximum, until to meet the needs of each CNC lathe processing users, become the goal pursued by the automotive manufacturers, with CNC machine tools, mainly flexible manufacturing units, are used extensively. There are two key development directions of today's CNC machine tools:
High-speed CNC lathe processing, high speed to achieve high efficiency. The current international level is spindle speed ≤ 25000rpm, acceleration and deceleration ≤ 2.5g, rapid movement ≤ 160m/min, to achieve this new level, CNC machine tools drive, mechanical transmission, mechanical structure, tools must have a great Improve. The main shaft of the machine tool must use the electric spindle. The main bearing is usually a ceramic bearing. The difficulty is cooling and lubrication. The service life is generally 20,000 hours. Drives typically use linear motors plus linear guides (also useful for hydrostatic guides), and 90m/min, 1g machines are also driven by dual servo motors with large pitch dual ball screw pretensioning schemes. The mechanical structure generally uses a frame box structure. The cutters are made of high hardness, high heat-resistant tools, and HSK handles are used for the tool holders.
Specialized CNC lathe machining or numerical control of special machines solves the contradiction between flexibility and high efficiency. At present, European and American automobile production mostly uses an agile production system composed of high-speed processing cores. Such a system can be manufactured with 100% flexible mixed flow and multiple varieties, and is composed of a plurality of flexible processing units called islands. Each island is composed of multiple similar ones. A machine tool and a manipulator that connects the machine tools, and exchanges information with the machine tool on pallets with electronic storage. It is worth noting that these equipment suppliers not only mastered the proprietary technology of equipment manufacturing, but also attached great importance to the development of automotive manufacturing process. They can provide users with turnkey projects and have their own system development capabilities. The reliability index of the machine tool is extremely advanced, with a single machine operating rate of more than 98%. With this production system, the period of industrialization of new products of automobile manufacturing manufacturers is greatly shortened.
After more than two decades of reform and opening up, the use of CNC lathes has become more and more widely used in the auto parts manufacturing sector in China. But most of them are machine tools imported from Europe, the United States, and Japan. The characteristics of Europe, America, and Japan are: good reliability, low failure rate; human-machine interface design emphasizes humanity; with active measurement and compensation system; can be provided with automatic loading and unloading Device processing unit; machine design modular. Although there are many domestic CNC machine tool manufacturers, but from the perspective of varieties, there are still many low-level general-purpose CNC lathes, and the multi-axis CNC machining center is suitable for high-volume automotive engines, gearboxes, and chassis main components. Most have not been subjected to mass production tests.
In order to make large-scale domestically-manufactured CNC lathes enter the automobile manufacturing industry as soon as possible, I think domestic CNC lathe processing manufacturers should focus on improving their own capabilities, mainly in the following aspects:
It is necessary to establish its own manufacturing process capability for automotive parts and components and develop products for the requirements of auto parts manufacturing. Gradually formed a serialized and modularized CNC machine tool products to meet the needs of auto parts manufacturing and production.
Attention should be paid to the development of squall line equipment (conveyors, trays, etc.). CNC machine tool manufacturers, as host suppliers of auto parts processing lines, should not only pay attention to the design and manufacture of mainframes, but also attach great importance to the elements that constitute modern agile and flexible units. The development of robots, conveyors, etc. Because the reliability of these devices affects the starting rate of the production line. The starting rate is very important for the large-scale production of automobile manufacturing industry.
Has the supporting ability of the whole line auxiliary machine. Due to the requirements of turnkey projects, as a contractor, he also pays attention to establishing his own long-term partner for the entire line contracting project, such as a dedicated cleaning machine, because the capabilities of the supporting equipment manufacturers also affect the entire line undertaking capacity.
Improve the ability of complete line automation design. Parts manufacturing in the modern automobile manufacturing industry has entered the era of agile production. The rationality of the design of automated information systems determines the normal operation of the production system. It is the application of high-tech technology in the manufacture of auto parts. It is the core competitiveness of modern CNC machine tool system suppliers.
Establish an effective feedback mechanism for user problems; establish user-oriented concepts and establish a rapid service system; automobile production is mass production, and timely maintenance and repair of CNC lathe processing and production equipment. Timely and effective services enhance the competitiveness of the company; at the same time, it helps to improve the quality of machine tools.
Pay attention to CNC lathe processing reliability design, the reliability of the machine tool is mainly ensured by the reliable CNC lathe processing and manufacturing system, and the quality control of the manufacturing process must be emphasized; ensuring the consistency of the manufacturing process is very important for the machine tool manufacturing industry.
Take advantage of the open and international exchange of favorable opportunities; absorb and digest, establish a standard with the international synchronization of CNC lathe processing machine tools.
Pay attention to the exchange and cooperation with the CNC lathe processing CNC system manufacturers, timely develop the CNC system with its own intellectual property rights, the CNC system should be open, and can meet the needs of auto parts manufacturing.
Establish a reliable CNC lathe processing and manufacturing system, abide by the contract, and pay attention to the delivery date.