Urgent out of high import dependence Broaching – china Pneumatic Accessories – D
"Foreign technology blockade against broaching a very serious, we basically relied on a number of high-end products from Germany, the United States, Japan, Italy and other imports, and import trend is intensifying." Recently, Changsha pull plug Electrical Equipment Manufacturing Co., Ltd. Executive Vice plane President Tanjian Wu told reporters on the China Industry News, breaking the monopoly of foreign high-end products broaching and technical blockade is imperative.
Broaching the slow development of
As a high efficiency, suitable for high-volume machining of metal cutting equipment, broaching mainly used in automobile, motorcycle, agricultural machinery, aviation and engineering machinery. Although the proportion of metal cutting machine tools in its present 0.8% to 1% only, but because of its size and shape of the location of processing high precision and easy maintenance, low processing cost and easy to automate, broaching increasingly wide range of applications, the process range from the normal broaching the hole and flat extended to more complex surface machining.
China's broaching industry dating back to the 50th century era of the former Ministry of Machinery, established in Changsha Machine Tool Works "Changsha Institute of plug drawing plane." After half a century, broaching domestic product by the generic product to the self-made former Soviet Union, enterprises designated by the then one more than the development of production to coexist. It is understood that broaching a process to completely replace the traditional milling, grinding, planing three processes, but due to the slow development of internal broaching, and could not be better promotion, so broaching machine has been in the metal cutting machine tools in non-mainstream status. "Also under the process equipment, testing equipment, quality domestic fittings effect, in the broaching of the species, size, yield, quality, delivery and technical level, we are still a wide gap with the foreign." Tanjian Wu told reporter.
Concrete expression of these gaps in, first backward product design, product technical reserves worse. "Basically, our Broaching Machine design experience is still using the traditional hand calculations and analogy, slow and error-prone, affect the progress of new product development and product quality, and some manufacturers also meets the current market, the lack of use of generation, development generation, a generation of long-term strategic goal of developing self-development ability. "Tanjian Wu said.
Second, the overall structure of broaching, assistive devices, general auxiliary equipment is still at normal level of design and manufacturing process, the lack of an independent advanced scientific design, manufacture, sale technical service capabilities. And by domestic CNC, electrical, hydraulic, pneumatic, cooling and other ancillary components of the constraints, broaching features and automation level of complex lower.
In addition, some unreasonable product structure design, material and heat treatment improper use detection means imperfect, but also a direct impact on their geometric precision broaching and machining accuracy.
"High-speed broaching the foreign auto industry has been widely used," Tanjian Wu told reporters, "has a history of a century of German KarlKlink broach manufacturing company has developed the broaching speed of 60 m / min or more Quench Broaching, and our Broaching the highest current rate of only 11 m / min. "
It is understood that the largest domestic production broaching machine broaching force of 1200kN, the largest broaching stroke is 3000mm, while the maximum tension reached abroad 1600kN, and variety than the whole, the product series, a high degree of general-purpose, short delivery time . "We are broaching the development of CNC spiral is only just beginning, and Japan's Fuji Co., Ltd. and Germany KarlKlink company more early 80s of last century had produced a larger tonnage of the NC spiral broaching machine, In addition, they developed the CNC crankshaft car broaching machine, broaching broaching centers and automated lines. "Tanjian Wu said.
R & D to accelerate the pace of
Insiders said that among the international front has been compared to the machine tool industry, in particular drill boring class machining centers, broaching manufacturing is still in our world, two third-level. As the automobile manufacturing industry in an increasingly competitive, broaching its accuracy, efficiency, flexibility, reliability, versatility, environmental protection and other requirements are also increasing.
Currently Changsha Machine Tool Works, Changsha pull plug planing, broaching, Ltd. Zhejiang Jinyun Samsung and other domestic enterprises have to meet the domestic demand in the low-end market, but high-end market is basically dominated by foreign products. "China's automotive, military, aerospace and other industrial processing of some key components, had to spend huge amounts of money being imported from abroad Broaching Machine." Tanjian Wu told reporters. Association of China Machine Tool Industry, according to Marketing Department statistics, from 2005 to 2007, imports accounted for each of broaching about half the domestic demand.
"A medium model (20 tons) of NC spiral broaching machine, imported from abroad need thousands of yuan, while China is developing the same types of products measured by the cost of only 100 million yuan," Tanjian Wu told reporters that the product is mainly for the automatic transmission in the processing and R & D within the helical ring gear, and now basically rely on imports. As the market demand for automatic transmission increased domestic purchasing of the Broaching model is increasing. "Accelerate the development of a priority. In broaching the field, we have many gaps to be filled."
"China will become the world's largest producer of cars, and auto parts are also being gradually incorporated into the global procurement system, parts exports increased year after year," Tan Jianwu that these goals, force us to develop as soon as possible, develop high-tech The broaching machine, to provide a high level of turn-key projects, satisfy market demands.
Clearly, domestic enterprises has been accelerated. It is understood that developed China's first since 2006 with independent property rights within the upper pull broaching, the Changsha inserted plane mechanical and electrical equipment manufacturing company pull another have developed China's first pull-up and China's first with CNC Spiral Broaching automatic loading and unloading of the automatic program-controlled pull-type internal broaching. Changsha Machine Tool Works has also developed in 2008, the largest internal broaching – Broaching tonnage of 120 tons of two-cylinder vertical broaching machine.
"Currently, we are on the dead lift, drum broaching machine, broaching into center field," Tanjian Wu said, "a drum Broaching alternative high-speed hobbing machine 9, and dead lift cutting technology is only in recent years abroad developed, it changed the traditional process, broaching the quenching directly after forming, can ensure complete accuracy and surface roughness of parts, but also improve work efficiency. "
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