The present situation and Prospect Analysis of the development of the NC milling machine peeling machine in the machine tool industry

China's economic growth slowed down this year, and the weakness of industrial growth has a major impact on the whole machining center industry. In modern society, the negative effects of overcapacity in the processing center industry begin to appear. In the next stage, the industry will absorb a small number of manufacturers, eliminate a number of backward enterprises, transfer a number of processing centers to foreign countries and improve product quality through annexation and reorganization. This not only solves the problem of overcapacity, but also improves the overall level of the processing center industry.

The market downturn also to bring the opportunity for transformation of machine tool enterprises, enterprises should be the main energy by selling products to improve the quality of the products, re set product line, development strategy, after falling out of many products, R & D processing center of strong profitability, ready for market.

Basic structure of CNC milling machine

Numerical control milling machine is a variety of CNC milling machines, although different types of CNC milling machines are different in composition, but there are many similarities. The following is an example of the XK5040A type NC vertical lift table milling machine. Xi saw 040A CNC vertical lifting milling machine equipped with IV four 3MA CNC system with full digital AC servo drive. The machine is composed of 6 main parts: the bed part, the milling head part, the worktable part, the cross feed part, the lifting platform part, the cooling and the lubrication part. The internal layout is reasonable, has good rigidity, the base is provided with 4 adjusting bolt for machine level adjustment, cutting fluid reservoir located in a shabby machine inside. Shanghai Lin Hui precision mould Co., Ltd is a specialized precision molds and parts manufacturing of private high-tech enterprises, the company has advanced production and testing equipment to protect the system and technical support system; a set of precision mold development, precision machining, stamping, assembly of finished products as a whole; ultra high micro design, precision parts production and processing efficient integration system. Products related to communications, automotive connectors and precision electrical components related fields. It is widely used in advanced science and technology manufacturing industries, such as automobile, aviation and so on.

Structure of CNC milling machine

(1) cooling system. The cooling system of the machine tool is made up of cooling pump, outlet pipe, return pipe, switch and nozzle. The cooling pump is installed in the inner cavity of the machine tool base, and the cooling pump hits the cutting fluid from the liquid storage tank in the base to the outlet pipe, and then passes through the nozzle to cool the cutting area.

(2) lubrication system and mode. The lubricating system is made up of manual oil pump, oil separator, throttle valve, oil pipe and so on. The machine tool adopts periodic lubrication mode, and uses manual lubricating oil pump to lubricate main shaft sleeve, longitudinal and transverse guide rail and three way ball screw through the oil distributor, so as to improve the service life of the machine tool.

From the technical characteristics of digital control. The machine adopts the servo motor control effect, application of digital technology to realize the direct control of the machine execution unit working order and displacement of the gear box structure of the traditional machine tool was canceled or partially cancelled, so that the mechanical structure is greatly simplified. Digital control also requires that the mechanical system have high drive stiffness and no transmission gap to ensure the implementation of control instructions and control quality. At the same time. Because the computer control level and the ability to continuously improve, the same machine allows more features and perform a variety of auxiliary functions needed has become possible, thus the mechanical structure of CNC machine tools than traditional machine tools with integrated functions and higher requirements.

From the perspective of the development of manufacturing technology, along with the emergence of new materials and new technologies, and the requirement of market competition for low cost, metal cutting is developing towards the direction of higher cutting speed and accuracy, higher production efficiency and more reliable system. This requires that the CNC machine tool developed on the basis of traditional machine tools has higher accuracy. The driving power is much more, and the mechanical mechanism is better in dynamic and static state and thermal stiffness, and the work is more reliable. It can achieve long continuous running and as few downtime as possible.

Milling head part of CNC milling machine

The milling head part of the CNC milling machine consists of two parts: a grade (or a stepless) transmission and a milling head. The spindle of the milling head is supported on the high-precision bearing. It ensures that the spindle has high rotary accuracy and good rigidity. The spindle is equipped with a quick tool changing nut, and the front cone adopts 1$0505 taper. The spindle adopts mechanical continuously variable transmission, which has wide regulating range, smooth transmission and convenient operation. The brake mechanism can quickly brake the spindle and save the auxiliary time. When the brake is brakes, the brake ring is opened and the stop ring is opened to brake the spindle immediately. When starting the main motor, attention should be paid to the loosening of the main shaft brake handle. The milling head components are equipped with servo motors, internal gear wheels, ball screw pairs and spindle sleeves. They form vertical direction (z direction) feed drive chain, and make the spindle move perpendicularly straight.

The worktable and the saddle are supported on the wide horizontal guide of the lifting platform. The longitudinal feed of the worktable is driven by a servo motor mounted on the right side of the worktable. The pulley drives a precision ball screw cut, so that the table with longitudinal feed. The left end of the worktable is equipped with a hand wheel and a scale plate for manual operation. And guide rail surface saddle adopts TuRcllE B with plastic, so as to improve the stability and precision of the rail wear resistance, retention, eliminating the low speed creeping phenomenon.

CNC milling machine base parts

The basic parts of CNC milling machine usually refer to the structural parts of the lathe body, column, beam, workbench, base and so on, whose size is large (commonly known as large parts), and the well constitutes the basic framework of the machine tool. Other parts are attached to the base, and some parts need to move along the base. As the foundation plays the role of support and guidance, the requirement for the foundation is a good stiffness.

According to the "2013-2017 years CNC market forecast and strategic planning analysis report", in 2015, CNC milling machine has become the mainstream of milling machine consumption. Especially the high-end CNC milling machine belongs to the high-end equipment manufacturing industry. It has the characteristics of high technology content and high technology added value. It is an important point for developing strategic emerging industries. The future high-end CNC milling machine market is huge.