Xu Zhengshun, general manager of Siemens CNC system, believes that China's machine tool industry has developed to the present day. After rapid development, its scale has been greatly improved. However, the main problem now is low production capacity and high production capacity. The machine tool industry is in urgent need of transformation and upgrading. The reasons for this situation are:
First: Some enterprises excessively demand unreasonable costs, resulting in vicious price competition, poor corporate profits, limited profits, and the loss of the ability of enterprises to re-development;
Second: in the use of too simple, convenient, and trouble-free, in the manufacturing process, machine tool manufacturing is too standardized, its process adaptability is not very good;
Third: Long-term use of a large number of non-open CNC systems, easy to use, but no secondary development capabilities, the design of such machine tools over time has lost the awareness of secondary development, just as people use card machines, fool-like camera, Let people forget the relationship between aperture and speed, only record images, but can't talk about photography.
Mr. Xu believes that the current problem facing China's manufacturing industry is a strategic trap in the development of the machine tool industry. A directional problem is also a problem worthy of consideration in the machine tool industry.
Why is it a trap?
After the high-speed development of the machine tool industry in the past few years, the scale has indeed developed greatly, but the brand awareness of the company has not been greatly improved. More, many companies are relentlessly positioned as low-end product suppliers by the market. The position, but have to face the user's unreasonable price, performance, functional requirements, thinking that this is the market demand, and always feel that no matter how to do it can not be converted into the satisfaction of users in the market, there are good things can not be sold . Always mistakenly thinking that to meet the market as their own responsibility, and gradually lost a very important thing - the company's guidance to the market.
The guiding force of enterprises to the market is an important indicator for the future, especially for sustainable development. From the perspective of market demand, China's processing and manufacturing industry is developing so fast. Are our requirements for processing improved or reduced? The answer is obviously: improved. Because at present, more than 60% of China's machine tool consumption is occupied by imported and joint-venture products, and the remaining domestic companies are basically at the bottom. Chinese users are not without high demand, but when he has high demand. We have not found a domestic machine tool company to solve it. This is the problem we are facing. How to solve the chain of vicious circle and find the breakthrough point of problem solving is indeed an aspect that we need to consider deeply.
How to transform and upgrade machine tool enterprises
First: Strengthen the construction of basic manufacturing management system. To put it simply, is to strengthen quality control and establish a more complete and independent quality monitoring system to solve the problem? For example, there is no such technical obstacle in standard turning and milling. Then, the thing to do is to do these machines and improve the quality, so that the machine tool industry can take a big step forward.
Second: The core content of industrial upgrading is intelligent manufacturing. The so-called intelligent manufacturing is that in addition to the direct processing tasks, CNC machine tools pay more attention to product process adaptability, can adapt to different industries, different product characteristics, processing characteristics, system equipment, production management, processing management, equipment maintenance, customization. Screens, network group processing, communication capabilities, and even system security functions are essential for intelligent manufacturing. Very interestingly, these have the same requirements for the CNC system - open! Only on an open system, users have the opportunity to integrate all the latest ideas and ideas into the design and manufacture of machine tools. This is not open CNC system or standard CNC system, connected to the line, can be used after power-on. The so-called simple and convenient system does not have.
Turbine Centrifugal Fan
Features: Turbine centrifugal fan impeller adopts the international standard backward design, the perfect streamline structure, large openings into the center of the impeller inlet wind, the wind through the center port into the wind, resulting in a strong centrifugal force, by the backward tilt fan blades thrown off quickly Turbine structure design makes the wind turbine has a strong wind, wind pressure.
Highlights: Turbine centrifugal fan by the overload thermal motor protection of the outer rotor, high efficiency after the circular arc-shaped centrifugal impeller of two parts. All impeller mold production, high precision dynamic balancing machine calibration, with small size, high efficiency, air volume, small vibration, low noise, superior performance, easy installation and commissioning.
Application: Material: Made of PA6 plastic, plastic one molding process. Diameter size 155mm ~ 250mm.
Applications: Air purification equipment, factory equipment (printing equipment, chemical fiber equipment, etc.), medical equipment, fresh food cabinets, refrigeration cabinets, servo motors, inverters, pipe ventilation, dehumidifiers, etc.
Volute centrifugal fan:
Features: Volute centrifugal fan impeller driven by the motor rotation, the impeller blades forcing gas rotation, the gas to work, to increase its energy, the centrifugal force in the gas around the impeller thrown through the scroll casing will speed Can be converted into pressure energy, when the impeller gas is discharged, the impeller pressure is lower than the pressure inside the inlet, the new gas in the pressure difference under the action of inhalation impeller, the gas is continuously exported from the outlet.
Highlights: The fan is designed with a reasonable impeller angle according to the aerodynamics of air flow. Without any mechanical friction during operation, a reasonable blade shape line minimizes the noise. The optimized impeller minimizes the axial force and has an efficient impeller , And the static and dynamic balance correction, the machine running smoothly, without any damping device, the bearing amplitude is relatively small.
Application: Material: Aluminum die-casting frame, wind wheel made of galvanized sheet, surface black electrophoresis, size Diameter: 120mm ~ 160mm
Applications: Sterilizers, heat exchange systems, clean benches, air shower, laboratory equipment, etc.
choose the suitable fan
1, the first parameter to note are: air volume, total pressure, efficiency, sound pressure level, speed and motor power.
2, Centrifugal fan pressure can be divided into three categories: high pressure centrifugal fan P> 3000Pa, medium pressure centrifugal fan 1000≤P≤3000Pa and low pressure centrifugal fan P <1000Pa. Depending on the stupid physicality and chemical properties of the delivered gas and the use, etc., different types of centrifugal fans are selected.
3, taking into account the loss of air leakage pipeline system, calculation error, as well as the actual fan fan, wind pressure negative deviation, centrifugal fan selection, the general use of air flow rate of 1,05 ~ 1,1, wind pressure of 1,10 ~ 1,15 safety factor. In order to prevent long-term fan in low-efficiency operation, it is not appropriate to use excessive safety factor.
4, in order to make the fan stable operation, should make the fan work in the vicinity of its efficiency, the fan operating point is located in the performance curve of the full pressure peak point on the right (ie, gales side, and is generally located at full pressure peak 80%). Fan design efficiency of the selected conditions, not less than 90% of the fan efficiency.
5, the use of variable frequency fan, the total pressure loss should be calculated as the system rated pressure, but the fan motor power should be calculated on the additional 15% to 20%.
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Shenzhen Fu Sheng Electric Co., LTD. , http://www.fushengfan.com