Analysis on the development and current situation

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Analysis on the development and current situation of hydraulic breaking hammers in China

1 current situation

the development status of hydraulic breaking hammers in China can be summarized as follows: the start is not late and the development is slow. The research and development work started in the 1970s. During the "sixth five year plan" period, it has been listed as a key scientific and technological project. In 1984, a hydraulic hammer research and development project passed the ministerial appraisal

since the early 1980s, many units in China have participated in the research and development of hydraulic hammers. Scientific research institutions include Changsha mine Research Institute, Beijing University of science and technology, Central South University of technology, etc. The manufacturers include Jiaxing metallurgical machinery factory, Xuanhua mining machinery factory, Shanghai Construction Machinery Factory, Tonghua pneumatic tool factory, Changzhi hydraulic parts factory, Shenyang pneumatic tool factory, Yueyang machine tool factory, Harbin hydraulic machinery factory, Foshan Textile Machinery Factory, Ma'anshan Jingtian company, Hunan Shanhe company and more than 20 units. Many types of hydraulic hammers have passed the technical appraisal. But up to now, most manufacturers have stopped the production of their original products because of problems such as unsalable products and poor quality. Only Changzhi hydraulic parts factory has always adhered to the production of hydraulic hammers. Shenyang pneumatic tool factory and Japan Guhe company produce Japan Guhe G series hydraulic hammers. Ma'anshan Jingtian company and Hunan Shanhe began to produce their own trademark hydraulic hammers at the beginning of the 21st century, but the scale is still small. At present, the domestic situation of this industry is:

(1) there are many sellers and few manufacturers

entering the 21st century, with the development of China's capital construction and construction industry, China's construction machinery market has also developed greatly. The market growth of excavators is particularly rapid, from 7434 units in 1999 to 23500 units in 2003. It is predicted that it will reach 27500 units in 2004 and 30000 units in 2005 [1][2]

the market demand for hydraulic breaking hammers as working parts of hydraulic excavators has also increased rapidly. The variety, quality and quantity of domestic hydraulic hammers cannot meet the market needs. Therefore, a large number of foreign hydraulic hammers enter the Chinese market. Hydraulic hammers from Germany, Finland, the United States, Italy, Canada, Japan and South Korea can be seen on the market. Among them, the number of Korean hydraulic hammers, chitin is the only natural high molecular polymer with positive charge in nature, and the other is the most. There are many hydraulic hammer sellers in China, including more than a dozen or even dozens of sellers in big cities such as Beijing, Shanghai, Guangzhou, Tianjin and Shenzhen. Most of them sell foreign brands, but there are few domestic brands and production, only a few. The variety and quality of domestic hydraulic hammers are far behind those of foreign hydraulic hammers, and the market share is very low

(2) there are many research papers and few reports.

domestic research units have carried out a lot of theoretical research for more than 20 years. Many papers on theoretical calculation, experimental technology, mechanism principle have been published in magazines such as pneumatic tools of rock drilling machinery, engineering machinery, construction machinery, and many dissertations on hydraulic hammers in Colleges and universities. However, reports on the use of domestic hydraulic hammers in mines, construction sites and other sites are extremely rare. This is in contrast to the situation in foreign countries. A large number of reports on the use of hydraulic hammers in demolition sites and tunnel projects have been written in European and American countries, while less theoretical research articles have been published. But their products sell well all over the world

(3) long product cycle and less improvement and innovation

from a worldwide perspective, hydraulic hammer is a product developed in the late 1960s and early 1970s. The hydraulic hammers of Germany's Krupp, Finland's Ruima, Japan's Guhe and other companies have been improved and upgraded for many times, threeorfour or five times, and small improvements continue

the manufacturing of hydraulic hammers in China basically starts with imitation or introduction of technology, lacking original creation. The introduced technology may not be the best, the selection of imitated products is sometimes not very appropriate, the digestion and absorption capacity is not very strong, and there is a lack of secondary innovation. The imitation speed is not fast. When the introduced or imitated products have been eliminated abroad and a new generation of products have been launched, the products we introduce or imitate with great efforts will inevitably die out

(4) the industry ownership of the products is unclear, and the statistical data is lack

in any statistics of mechanical products and construction machinery products in China, there is no data of hydraulic hammer. Such as production volume, sales volume, holding volume, export volume, output value, sales volume, etc. While Japan and South Korea have statistical data on the sales and sales of hydraulic hammers (including crushing shears) every month and every year, table 1 and table 2

Table 1 Statistics of the production quantity of hydraulic breaking hammers in South Korea at the end of the last century [4]

1996, 1997, 1999, 2000

5211, 3985, 2142, 2488, 763

(69.4) (-23.5) (-46.2) (34.6) (-73.5)

* including the growth rate (%) compared with the previous year

Table 2 the sales volume of hydraulic hammers (shears) in Japan in 2003 Sales [5]

monthly sales volume (units) total domestic export sales (million yen)

1 3288995211420

2 2741045911635

3 2921132721 1853

4 2638767241618

5 26094264 close the oil return valve 4 1586

6 277101651

total 1694589438699763

can be seen from table 1.In fact, the production quantity of hydraulic crushing hammers in South Korea showed a downward trend in the late 1990s, It was mainly affected by the Asian financial crisis and the contraction of the domestic construction market, but at the same time, it stimulated South Korea to increase the export of hydraulic hammers and other construction machinery products

corresponding to the lack of statistical data of hydraulic hammers in China, the industry ownership of hydraulic hammer products is unclear

hydraulic products belong to the excavator accessories industry? Or is it in the hydraulic machinery industry? Or does it belong to the rock drilling machinery industry? There is no unified statement at present

is the hydraulic hammer a main engine product or a accessory product? Japan and South Korea have listed it as a host product, and the hydraulic hammer is juxtaposed with excavators and loaders. The output value and complexity of hydraulic hammers are much higher than those of ordinary excavator accessories. Moreover, the hydraulic hammer is not only matched with excavators, but also used with loaders, steel mills, and mining fixed or Mobile crushers. The author's opinion: the hydraulic hammer should be listed as a host product rather than a accessory

there is no problem that hydraulic hammers belong to the category of construction machinery. The working objects of hydraulic hammers are hard solids such as rock, concrete, refractory bricks, etc., which are more suitable to be classified as stonework machinery. The working object of rock drilling machinery is also stonework. The author believes that under the current situation that the output and output value of hydraulic hammers in China are relatively small, hydraulic hammers (shears) should be attributed to the rock drilling machinery industry. When the production of hydraulic hammers develops to the scale of Japan and South Korea, hydraulic hammers (shears) are separately listed as a product category

China's hydraulic hammer manufacturers have not yet cooperated with the "airborne hydraulic crushing hammer Manufacturers Association: (mbmb) In case of any relationship, if considering the export of products in the future, it is still necessary to establish contact with mbmb

2 the market prospect is broad. Domestic hydraulic hammers should catch up with highly developed and moderately developed countries such as Japan and South Korea. The domestic capital construction market has been saturated, its domestic construction machinery market has stagnated or shrunk, and many construction machinery such as hydraulic hammers rely on exports. However, the whole process of social industrialization in China has not been completed, and a large number of railway, highway and water conservancy infrastructure construction are being and will be carried out. Transportation and housing construction in large, medium and small cities are in the ascendant, providing a large number of market opportunities for hydraulic hammers and other construction machinery. Because there is no statistical data, we cannot accurately guide the market sales and demand of hydraulic hammers in China. Only according to the fact that 19500 excavators were sold in China in 2002, it is predicted that 30000 excavators will be sold in China in 2005. The above sales volume does not include the import volume. In 2002, 2947 excavators were imported through the customs, and 6776 excavators were imported in the first half of 2003. This does not include second-hand excavators that entered the Chinese market through illegal channels. It is estimated that more than 20000 smuggled second-hand excavators enter China every year [6]. If the sales volume of domestic products and the import volume (legal and illegal) are combined, by 2005, more than 50000 excavators will be sold on the market every year. If 10% of excavators are equipped with hydraulic hammers, the market demand for airborne hydraulic hammers in 2005 will reach 5000. This is only equivalent to the annual output of hydraulic hammers in South Korea in 1996

since entering the 21st century, Ma'anshan Jingtian company and Hunan Shanhe company have launched hydraulic hammers with their own trademarks. At present, domestic manufacturers with relatively large scale include Jingtian company, Shanhe company and Changzhi hydraulic parts factory. However, the market share of domestic products is still very low, and most of the market is occupied by products from South Korea, Japan and Germany. Business opportunities cannot be lost. Domestic entrepreneurs should seize the opportunity of the great development of the product market, carefully manufacture, constantly innovate, expand sales, recapture the domestic market, and even export to foreign countries

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