Analysis of Present Situation of Hydraulic Machine Manufacturing at Home and Abroad

Status Quo of Hydraulic Press Manufacturing in China. Forging equipment is a forming machine, hydraulic press is an important member. According to the industry statistics released by the China Machine Tool Industry Association in recent years, the market capacity of forging equipment in China is close to 70 billion yuan, while the hydraulic machine that accounts for about 30% of the forging equipment has a market capacity of about 20 billion yuan. As for the number of hydraulic press manufacturers, although there is no exact statistical data, it is estimated that there are nearly 1,000. Mainly state-owned restructuring enterprises and private enterprises.

At present, China's hydraulic press products still continue the two classification methods of small and medium-sized hydraulic presses. The first is divided into general and special categories according to product use. The second is divided into general, large and heavy according to the weight of the product itself. Its own weight of 10 tons or less is called a general hydraulic press, a weight of 10 to 30 tons is called a large hydraulic press, and a weight of 30 tons or more is called a heavy hydraulic press.

The manufacture of general-purpose, medium and small-sized four-column hydraulic presses is mainly focused on small and medium-sized private enterprises with less than 100 employees. It has obvious product price advantages in the low-end market. Only Baipu Town, Nantong, Rugao City, Jiangsu Province has gathered nearly 50 general-purpose hydraulic press manufacturing companies with annual sales of nearly 1.5 billion yuan.

The manufacture of special-purpose, heavy-duty hydraulic presses is mostly concentrated on companies with strong capabilities. The area forming hydraulic press used in the automobile industry is mainly based on the hydraulic press manufacturing companies that belong to the former Ministry of Machinery Industry; the bulk forming hydraulic presses used in the forging are mainly based on backbone enterprises and heavy machinery companies.

China's hydraulic press manufacturing company's product varieties, performance and appearance of similarities. Backbone companies can produce nearly every series of stand-alone products used in the main process of multi-process forming processes, but they lack specialized, refined, special products and complete sets of products. Before the delivery of hydraulic press products, due to the lack of process verification stage, companies often fall into the embarrassing situation of “products do not leave factory and worry about after delivery”.

Status Quo of Hydraulic Machine Manufacturing in Industrial Developed Countries . The hydraulic presses manufactured by industrialized countries such as Germany, Japan, and France represent the international advanced technological level of contemporary hydraulic presses. The hydraulic machine manufacturing enterprises in these industrialized countries have the following three significant characteristics:

The first is to lock in the target market and serve the professional forming process field. German hydraulic press manufacturers target the modern mass production of automobiles, mechanical parts and household appliances. For example, DORST Technology Co., Ltd. specializes in the development of hydraulic presses for powder metallurgy products. Dieffenbacher GmbH in Germany specializes in hydraulic presses for FRP products, while Schuler Group SMG Co., Ltd. produces sheet metal for automotive manufacturing. Mainly formed and metal bulk formed hydraulic presses. In the early 1990s, “Tianjin Nande Press Co., Ltd.”, a joint venture between Tiandeng, CITIC, and SMG of Germany in TEDA, produced such products.

Japan's hydraulic press manufacturing companies also use mass production such as automobiles as their target market to serve various forming process areas. For example, Japan's Amino Co., Ltd. mainly manufactures hydraulic presses for hydraulic presses and automotive liquid-filled parts used in the manufacture of automotive panel molds. In the mid-1990s, Tiandeng had cooperated with Aminuo Co., Ltd. and produced four research hydraulic presses and a trial die hydraulic press for the Tianjin Mould Center.

The second is to provide complete process forming equipment. Hydraulic machine manufacturing companies in industrialized countries focus on providing multi-pass process equipment to the forming process market, and provide complete services for multi-process forming processes through automatic connection between processes. For example, the refrigerator compressor shell production line successfully developed by Germany SMG in the 1980s covered all processes such as decoiling, leveling, conveying, blanking, stretching, drilling, and stacking, and produced 13 shells per minute. Or 15 covers.

The third is to focus on product forming process research and process validation. German hydraulic press manufacturing companies attach great importance to the study of product use technology and have the right to speak of the forming process. Such as Germany Dieffenbacher company is not only the production of glass steel products hydraulic press manufacturers, but also the use of glass steel products hydraulic press production of glass steel products manufacturers, which have a full use of process validation, and then can greatly meet the user's use of process requirements.