Obvious gap between China's valve industry urgently enhance innovation capability

China Product


In recent years, China's valve industry, the development of faster, but still low overall level of the industry, products with low technological content, and many key parameters of high valve also imported. Some experts estimate that the level of our valves, compared with foreign advanced countries to 10 to 20 years behind. Not long ago, China's valve industry, to strengthen the valve manufacturing industry and the European exchanges, has organized more than 10 domestic enterprises had had valve trip to Europe, learned a lot of valuable experience of foreign counterparts, while the valve industry compared with foreign , also see our own shortcomings.

Process gaps

In the welding process, the German company to meet the nuclear-KSB valve sealing material against radiation, and has been widely used in special welding of cobalt-free solder powder; France Wieland will preheat valve, automatic welding, after welding treatment in the same equipment or processing production line with a complete, whether before welding, welding, after welding, handling, temperature control can be achieved to ensure the welding quality. tire wheel barrow

The welding on domestic technology behind the valve, and some also use old-fashioned welding, welder low level of technology, the solder material is also common materials, special valve design reach. Many enterprises engaged in production and sales all day, very few improvements in the technique on studying. fork lift tires

In forging the use of new technology, the German company KSB valve material to high temperature alloy steel F91, F22-based, while the high-pressure valve Youyi forgings mainly to ensure the reliability and economy. On the volume below the valve 600Lb greater use of forging and welding, the valve is not caused by casting porosity, loose, and many other defects, and greatly reduce the waste of free forging materials, economy greatly improved. used forklift forks

The domestic industry mostly valve rough pieces of multi-casting, forging the little used in the following high pressure valves 600Lb forging more easy to find. This regard, many enterprises in order to reduce costs, mostly by steel casting, low pressure cast iron pieces and more low-cost materials and processing technology is simple.

Quality management and equipment gaps

France Bernard electrical device company sales of 300 million yuan in 2005, exports accounted for 70% of sales, the establishment of a global sales network, our industry, papermaking, water treatment and oil and gas pipeline valves extensive use of the Denso Corporation products. In the nuclear field, their supply is ranked second in the world, France has 70 nuclear power plants to use their products. Their management is in place, the company recorded a single with the parts machining parts with circulation, production sites neat, clean, two assembly lines in order to work. They use screw machining roll, high efficiency, high surface finish parts. After processing, the parts cleaning in a timely manner, the location appliance applied correctly, such as the axis of each set in a plastic bag, very simple but very useful to avoid the collision between parts scratch. Parts of the painting with the domestic similar way, but because of its smooth and rough excellent quality paint, spray paint the future products, the appearance of effectiveness and quality is very good.

In contrast, the domestic quality management are still shortcomings, first of all more or less ignored in the process, many businesses have quality assurance system obviously can play no part in practical work but the quality management implementation up their own way, arbitrary; Second, in the assembly process is sloppy. No wonder some of the valve installed on the emergence of a run, run, drip, drain phenomenon.

Another example is a lot of production equipment, backward country, has remained in the last century the level of 70 to 80 years, some equipment had a life long period, also at full capacity, processing quality, how can guarantee? Some limited funds, also have been buying a digital control and processing center, but the formation of NC processing enterprises are not many in the industry so far, only about 20%.

Process management gaps

France Wieland Equipment layout process by product line were, in order to achieve the shortest processing line, so the operator can be in the range of motion within the smallest workpiece. They used a lot of five-axis machining centers and even flexible machining center, CNC milling machines and CNC machine tools, the computer-aided manufacturing a line, the product in a clamping device, once programmed. Programming can be even remotely in the office, so that simplifies the machining process, engineering and technical personnel as long as the program code is good, use appropriate tools, we can guarantee the product's processing requirements, and to product quality and high efficiency.

Tong Yang, the new Italian company Liucheng Billund features are: Jiedao order Hou, Kai Fa center into the design, Tigong product's design drawings, Wai outsourcing agreement details, Ji Xie processing procedures Jishu documents, through an internal Wangluochuanshu Daogexiangguan Bumen , the production department in accordance with technical requirements and sales orders to organize production. Blank into the plant, the Kuguan officers under the production plan will be blank and the other parts of the parts sent to the processing, assembly sites, not all of them produce their own, many are purchasing. But they almost all product components are completed in the NC equipment, processing accuracy, processing efficiency is very high. Staff in the operation of CNC machining equipment, processing platform can be access to parts diagrams and parts processing procedures, he requested only by processing the workpiece clamping to the numerical control device, start processing, you can automatically cars, drilling, milling, boring and other machining processes.

And many domestic enterprises do not professional valve, small but complete, the product mix, processing valve disorder, irrational processing equipment workshop, parts and components stacked not concentrate. Currently widely used piece-working hours, but also the disadvantages, unreasonable work hours, most still use the original hand-record aggregate settlement. It is because of some restrictions on business process management, leading to the low level of product technology, processing delay, raw material waste.

In addition, the internal mechanical processing equipment process layout are mostly arranged by type of equipment, furnishings, such as machining centers, horizontal on a row, standing on a row, put a row of CNC machine tools, such arrangements only consider to the site tidy, without considering the ease of operation, labor productivity is low, its head.