In the 21st century, many unexpected changes have taken place in the world. These changes have directly or indirectly affected China's economic construction and have affected the development of supporting enterprises in the construction machinery industry. This mainly includes the cost pressures brought about by the rising prices of raw materials and other factors of production to the companies that make up the components, which allows the internal digestion and tapping potentials of the enterprises to be close to the limit. The subprime mortgage crisis and the appreciation of the renminbi have caused the export situation of the accessory companies to be not optimistic; The future development trend of the company. In summary, this is the internal and external environment that we face in the construction machinery accessory industry. We must actively respond to the difficulties and make the construction machinery accessory industry bigger and stronger.
Energy conservation and environmental protection become the development trend of the industry
At present, the accessory industry has made progress in research on energy-saving and environmental protection technologies. Hydraulics project of Changjiang River and approved by the National Development and Reform Commission for "Enhancing the Quality of Energy-saving and Environmental-protected Hydraulic Parts and Technological Transformation for Large-scale Production" and the "Research on Key Technologies for Full-load Feedback Electro-hydraulic Proportional Control of Engineering Valves for Engineering Machinery" in collaboration with Zhejiang University, The multi-valve products derived from the research results have been promoted to Sany, China United and the long cranes; the other result is the high-pressure large displacement gear pump (patented for patent), which has been applied to such machines as loaders and road rollers. Due to the high technical content, it brings considerable benefits to the company. The engine companies are also developing energy-saving diesel engines such as Weichai.
The development of energy-saving products is the trend of the times. The supporting parts companies must work closely with the host companies to study integrated components such as load sensing, load feedback, and electrohydraulic control to achieve maximum power saving and full use of power. Early recognition, early start, and early actions will occupy the market as early as possible. . Like the electronic control box produced by Hangzhe, the variable hydraulic parts produced by Liyuan and Sai Kesi have been prepared for excavator support as a high-end accessory, and will also occupy a leading position in serving energy-saving construction machinery. .
Significant progress has been made in technical progress in the industry
First, hydraulic parts. The development of a number of domestic accessory enterprises is encouraging. For example, hydraulic components for excavators and other types of aircraft, Jiangsu Hengli's high-pressure cylinders took the lead in breakthroughs, product quality was confirmed by the host user, and investment of 200 million yuan was rewarded. The company is now expanding its production capacity in order to make greater contributions to the import substitution of high-pressure cylinders. Jiangyin's long-term central rotating body has been matched with major well-known host manufacturers, replacing imports, and the domestic market share of the product has reached 90%. Jiangsu Ruilong has introduced a batch of hydraulic components including main pumps, main valves, rotary devices and traveling devices for 6.0 tons of small digging. As the first listed company in the industry, Liyuan Hydraulic Co., Ltd. has achieved a small batch of main pumps, rotary devices and walking devices for 3.5 tons and 6.0 tons of small diggings in just over a year. Independent small excavation hydraulic production line. Fengyang Hydraulic Co., Ltd. has made great efforts in multi-way valves and has developed 0-ton excavator multi-way valves, 3.0-6.0 tons multi-way valves that are independent of load pressure, and more than 20 tons with negative flow control. Road valve and other products.
The development of hydraulic parts enterprises in Zhejiang can not be ignored. The sales of all types of main pumps of Guangtian Sikesi has approached 3,000 units. Some of the variable pumps for small digging are evaluated at the main engine plant, and some are used in the rear market. At the same time, they have also newly developed a variety of specifications for rotary and traveling motors. Jiangbei Yuzhou developed a multi-way valve for the small digging, the project has been completed, the installation has been approved by the user after the assessment, is expected to enter the market for mass production at the end of the year. Dagang Yingning 1.6 to 8.0 tons of small digging equipment and rotary devices have been successfully tested and batch orders. Rexroth series reducer has been supplied to the host manufacturers in batches. The company has authorized 4 invention patents this year and won the Ningbo Science and Technology Innovation Award. Linhai Haihong has developed 5.0-ton, 6.0-ton, 7.0-ton, and 4.2-ton small digging multi-valve valves, some of which have been evaluated and tested with the host, and some have been supplied in small batches. Wenzhou Shengbang added a hydraulic valve production line consisting of a processing center. The product is equipped with crawler cranes of various sizes up to 650 tons, which can replace imported products. Zhejiang Suqiangge, the largest manufacturer of pipe fittings in China, is also making inroads into high-end products. Hydraulic pilot valves have provided more than 2,000 sets to the host manufacturers.
Some high-end products in the R&D stage of hydraulic components manufacturers should not be disclosed too early in the industry and may surprise the industry in the near future.
Second, transmission and other accessories. The advanced tooth gearbox products of Hangzhe are widely used in construction machinery such as loaders, graders, and road rollers, and the annual output has reached 35,000 sets. The company's electro-hydraulic shift transmission is expected to produce 8,000 units a year. The sales of construction machinery transmissions are expected to reach 550 million yuan this year. In addition to vigorously developing electronically-controlled gearboxes, the wet drive axle is another goal of corporate development. Samples will be introduced at the end of the year.
The joint ventures Liuzhou-ZF and Xuzhou Meichi, which manufacture electronically controlled transmissions and wet drive axles, have mastered advanced technologies. The products have occupied a considerable share of the domestic market and have achieved very good results. Xuzhou Liangyu, Chenggong Bridge Box Company and Fenyi Bridge Factory are all developing in this direction, and some of them have already formed mass supply markets. Shantui International Business Park has concentrated all the components used in the chassis, including four-wheel-and-a-side, structural parts, double change and cabs, all of which are of high-tech level. After several years of hard work, Shantui products have not only provided support for Komatsu, but also its structural parts, such as sticks, etc., have also been exported to Japan in batches and exempted from inspection. Now the production scale of Shantui's mainframe and accessories is almost evenly divided.
Related issues need to pay attention
First, the core hydraulic components and transmission components cannot keep up with the need for high-level development of the host. At present, the prevailing view of the host company is that the core hydraulic components and transmission components depend on imports. The main problem is the long lead time and the quantity is not guaranteed. As for the price issue, it seems to have been discharged to a secondary position. Domestic high-level hydraulic parts products are not mature enough to support the mainframe in batches, and are basically in the trial and trial phase. The development is not balanced, and there are few specifications and it is difficult to provide the mainframe with specifications. Reliability cannot be fully verified in the short term, so the current reliance on imports has not changed fundamentally.
Second, hydraulic attachment oil pipe, hose joint oil leakage phenomenon is more prominent and widespread. After four rounds of work on the chassis, oil leakage may occur, due to the poor quality of the floating seal ring, the rubber seal ring, and the rough machining of the hole in the wheel. It is recommended to use floating seals with regular quality guaranteed manufacturers.
Third, there is no guarantee of cleanliness. Even if the main hydraulic components for the main engine are imported, the degree of cleanliness is also acceptable, but the cleanliness of the domestic pipeline system and fuel tank is not good, and the oil will bring dirt and impurities into the system during the system cycle. In the pumps, valves, motors, and working cylinders, wear is aggravated, efficiency is reduced, and reliability is reduced. In severe cases, the movement becomes stuck and stops. It is advisable to purchase several accessory products from a company, so that if there is a problem with oil leakage and cleanliness, the manufacturer can be directly responsible.
Fourth, the appearance quality needs to be strengthened. Some of the small construction machinery abroad, the most impressive one is the appearance of beautiful appearance and beautiful appearance. Some domestic products have weak lacquer layers, which cannot withstand wind and sun exposure and acid and alkali salt erosion. Export products have also encountered blemishes that have fallen off the paint in the other port. The development of nanotechnology, the perfection of nano-powder preparation process and industrialization, and the appearance of nano-powder may be an effective way to solve the problem of anti-corrosion of surface coverings. The titanium alloy nano-heavy anti-corrosion coating developed by Changsha Kexing Nano has been used by several manufacturers. It is said that the antiseptic effect is good.
Suggestions for the development of the industry
First, the development of the industry needs to establish a strategic supporting system.
At present, the overall size of domestic high-end hydraulic and transmission accessories companies is still relatively small, with insufficient talents and funds, and development cannot keep up with the urgent needs of the host. The accessory industry is an industry with high technical requirements, low output, high investment, and low efficiency before the scale has been formed. If the joint venture or asset restructuring is conducted with the leading enterprise, the host company will invest to form a stock cooperation. Host funding and talent advantages may achieve a win-win situation. For the host company, an accessory factory was built offsite to better take the path of specialization. In the past, we had called for the establishment of two groups of hydraulics and transmissions to overcome redundant construction, make full use of resources, make the company bigger, and enhance its anti-risk capability. The problem is that the accessory companies themselves are short of funds and they still have no funds. Therefore, it is only a With good wishes and long-term goals, it is difficult to become a reality in the short term. Advocate horizontal integration, coordination and mutual assistance, and work together to develop high-end accessories. Since the second small-scale digging seminar in 2007, the trade association has been calling for “horizontal cooperation, coordination, mutual assistance, and common developmentâ€. It is hoped that the companies in the industry will establish great industrial ideas, consider the overall situation, and promote the industry to develop quickly and well.
Second, supporting parts companies need to refine management and fine processing.
Variable hydraulic components and transmission components with high technological content belong to precision machinery and require every aspect of the machining process to be nuanced. It is difficult to make detailed regulations for general process regulations. German production of hydraulic parts is as meticulous as the completion of an artwork, meticulous, so Rexroth, Linde hydraulic parts have become internationally recognized first-class products, the assembly of these products requires a dust-free purification environment, indoor Humidity temperature is also required. In fact, there is no important degree of distinction between the parts and components for the main engine. Which part has its own function and role, all of which require precise management and processing, strict process control and inspection, and only in this way can we create a world-class product.
Third, promote agricultural digging product upgrades, energy saving.
For energy saving and emission reduction of construction machinery, we must pay attention to the agricultural excavation in the excavator industry. In 2007, a total of more than 80,000 farmer diggers were sold in the country, which is even larger than the sales volume of standard excavators. However, there are many inherent defects in agricultural excavation, such as poor performance, many faults, low operating efficiency, and high energy consumption. Yao Guangshan, a member of the kit consulting division, after a large number of investigations and researches, put forward the view of developing economical and practical small digging. This kind of full-track crawler type digging, diesel engine, variable hydraulic system and other components are all domestically configured, and the selling price can be controlled at 200,000 yuan. Within that, the performance will be significantly higher than that of the agricultural digging, and it will be more than 20% more energy than the agricultural digging. If after several years of development, the half of the agricultural digging sales is replaced, the significance of energy conservation is very significant and cannot be ignored. From another point of view, the current domestic hydraulic components are just able to adapt to the supporting level of this excavator. Of course, with this platform, the level of hydraulic components is gradually increased. The ultimate goal is to achieve the support of high-end hydraulic excavators. This cannot be achieved. Shaken. It is understood that some companies have already developed in this direction.
The national economic construction requires the rapid development of the construction machinery industry. The national industrial policy requires that the high-tech products of the construction machinery accessory industry support the domestic main engines as soon as possible, substitute imports, and make the industry enter a sound development track. The situation and environment have never required us to communicate more closely, communicate and cooperate with the host industry as we do today. The localization of excavator support has made initial progress and is fully consistent with the current goal of developing energy-saving and emission-reducing engineering machinery.
Energy conservation and environmental protection become the development trend of the industry
At present, the accessory industry has made progress in research on energy-saving and environmental protection technologies. Hydraulics project of Changjiang River and approved by the National Development and Reform Commission for "Enhancing the Quality of Energy-saving and Environmental-protected Hydraulic Parts and Technological Transformation for Large-scale Production" and the "Research on Key Technologies for Full-load Feedback Electro-hydraulic Proportional Control of Engineering Valves for Engineering Machinery" in collaboration with Zhejiang University, The multi-valve products derived from the research results have been promoted to Sany, China United and the long cranes; the other result is the high-pressure large displacement gear pump (patented for patent), which has been applied to such machines as loaders and road rollers. Due to the high technical content, it brings considerable benefits to the company. The engine companies are also developing energy-saving diesel engines such as Weichai.
The development of energy-saving products is the trend of the times. The supporting parts companies must work closely with the host companies to study integrated components such as load sensing, load feedback, and electrohydraulic control to achieve maximum power saving and full use of power. Early recognition, early start, and early actions will occupy the market as early as possible. . Like the electronic control box produced by Hangzhe, the variable hydraulic parts produced by Liyuan and Sai Kesi have been prepared for excavator support as a high-end accessory, and will also occupy a leading position in serving energy-saving construction machinery. .
Significant progress has been made in technical progress in the industry
First, hydraulic parts. The development of a number of domestic accessory enterprises is encouraging. For example, hydraulic components for excavators and other types of aircraft, Jiangsu Hengli's high-pressure cylinders took the lead in breakthroughs, product quality was confirmed by the host user, and investment of 200 million yuan was rewarded. The company is now expanding its production capacity in order to make greater contributions to the import substitution of high-pressure cylinders. Jiangyin's long-term central rotating body has been matched with major well-known host manufacturers, replacing imports, and the domestic market share of the product has reached 90%. Jiangsu Ruilong has introduced a batch of hydraulic components including main pumps, main valves, rotary devices and traveling devices for 6.0 tons of small digging. As the first listed company in the industry, Liyuan Hydraulic Co., Ltd. has achieved a small batch of main pumps, rotary devices and walking devices for 3.5 tons and 6.0 tons of small diggings in just over a year. Independent small excavation hydraulic production line. Fengyang Hydraulic Co., Ltd. has made great efforts in multi-way valves and has developed 0-ton excavator multi-way valves, 3.0-6.0 tons multi-way valves that are independent of load pressure, and more than 20 tons with negative flow control. Road valve and other products.
The development of hydraulic parts enterprises in Zhejiang can not be ignored. The sales of all types of main pumps of Guangtian Sikesi has approached 3,000 units. Some of the variable pumps for small digging are evaluated at the main engine plant, and some are used in the rear market. At the same time, they have also newly developed a variety of specifications for rotary and traveling motors. Jiangbei Yuzhou developed a multi-way valve for the small digging, the project has been completed, the installation has been approved by the user after the assessment, is expected to enter the market for mass production at the end of the year. Dagang Yingning 1.6 to 8.0 tons of small digging equipment and rotary devices have been successfully tested and batch orders. Rexroth series reducer has been supplied to the host manufacturers in batches. The company has authorized 4 invention patents this year and won the Ningbo Science and Technology Innovation Award. Linhai Haihong has developed 5.0-ton, 6.0-ton, 7.0-ton, and 4.2-ton small digging multi-valve valves, some of which have been evaluated and tested with the host, and some have been supplied in small batches. Wenzhou Shengbang added a hydraulic valve production line consisting of a processing center. The product is equipped with crawler cranes of various sizes up to 650 tons, which can replace imported products. Zhejiang Suqiangge, the largest manufacturer of pipe fittings in China, is also making inroads into high-end products. Hydraulic pilot valves have provided more than 2,000 sets to the host manufacturers.
Some high-end products in the R&D stage of hydraulic components manufacturers should not be disclosed too early in the industry and may surprise the industry in the near future.
Second, transmission and other accessories. The advanced tooth gearbox products of Hangzhe are widely used in construction machinery such as loaders, graders, and road rollers, and the annual output has reached 35,000 sets. The company's electro-hydraulic shift transmission is expected to produce 8,000 units a year. The sales of construction machinery transmissions are expected to reach 550 million yuan this year. In addition to vigorously developing electronically-controlled gearboxes, the wet drive axle is another goal of corporate development. Samples will be introduced at the end of the year.
The joint ventures Liuzhou-ZF and Xuzhou Meichi, which manufacture electronically controlled transmissions and wet drive axles, have mastered advanced technologies. The products have occupied a considerable share of the domestic market and have achieved very good results. Xuzhou Liangyu, Chenggong Bridge Box Company and Fenyi Bridge Factory are all developing in this direction, and some of them have already formed mass supply markets. Shantui International Business Park has concentrated all the components used in the chassis, including four-wheel-and-a-side, structural parts, double change and cabs, all of which are of high-tech level. After several years of hard work, Shantui products have not only provided support for Komatsu, but also its structural parts, such as sticks, etc., have also been exported to Japan in batches and exempted from inspection. Now the production scale of Shantui's mainframe and accessories is almost evenly divided.
Related issues need to pay attention
First, the core hydraulic components and transmission components cannot keep up with the need for high-level development of the host. At present, the prevailing view of the host company is that the core hydraulic components and transmission components depend on imports. The main problem is the long lead time and the quantity is not guaranteed. As for the price issue, it seems to have been discharged to a secondary position. Domestic high-level hydraulic parts products are not mature enough to support the mainframe in batches, and are basically in the trial and trial phase. The development is not balanced, and there are few specifications and it is difficult to provide the mainframe with specifications. Reliability cannot be fully verified in the short term, so the current reliance on imports has not changed fundamentally.
Second, hydraulic attachment oil pipe, hose joint oil leakage phenomenon is more prominent and widespread. After four rounds of work on the chassis, oil leakage may occur, due to the poor quality of the floating seal ring, the rubber seal ring, and the rough machining of the hole in the wheel. It is recommended to use floating seals with regular quality guaranteed manufacturers.
Third, there is no guarantee of cleanliness. Even if the main hydraulic components for the main engine are imported, the degree of cleanliness is also acceptable, but the cleanliness of the domestic pipeline system and fuel tank is not good, and the oil will bring dirt and impurities into the system during the system cycle. In the pumps, valves, motors, and working cylinders, wear is aggravated, efficiency is reduced, and reliability is reduced. In severe cases, the movement becomes stuck and stops. It is advisable to purchase several accessory products from a company, so that if there is a problem with oil leakage and cleanliness, the manufacturer can be directly responsible.
Fourth, the appearance quality needs to be strengthened. Some of the small construction machinery abroad, the most impressive one is the appearance of beautiful appearance and beautiful appearance. Some domestic products have weak lacquer layers, which cannot withstand wind and sun exposure and acid and alkali salt erosion. Export products have also encountered blemishes that have fallen off the paint in the other port. The development of nanotechnology, the perfection of nano-powder preparation process and industrialization, and the appearance of nano-powder may be an effective way to solve the problem of anti-corrosion of surface coverings. The titanium alloy nano-heavy anti-corrosion coating developed by Changsha Kexing Nano has been used by several manufacturers. It is said that the antiseptic effect is good.
Suggestions for the development of the industry
First, the development of the industry needs to establish a strategic supporting system.
At present, the overall size of domestic high-end hydraulic and transmission accessories companies is still relatively small, with insufficient talents and funds, and development cannot keep up with the urgent needs of the host. The accessory industry is an industry with high technical requirements, low output, high investment, and low efficiency before the scale has been formed. If the joint venture or asset restructuring is conducted with the leading enterprise, the host company will invest to form a stock cooperation. Host funding and talent advantages may achieve a win-win situation. For the host company, an accessory factory was built offsite to better take the path of specialization. In the past, we had called for the establishment of two groups of hydraulics and transmissions to overcome redundant construction, make full use of resources, make the company bigger, and enhance its anti-risk capability. The problem is that the accessory companies themselves are short of funds and they still have no funds. Therefore, it is only a With good wishes and long-term goals, it is difficult to become a reality in the short term. Advocate horizontal integration, coordination and mutual assistance, and work together to develop high-end accessories. Since the second small-scale digging seminar in 2007, the trade association has been calling for “horizontal cooperation, coordination, mutual assistance, and common developmentâ€. It is hoped that the companies in the industry will establish great industrial ideas, consider the overall situation, and promote the industry to develop quickly and well.
Second, supporting parts companies need to refine management and fine processing.
Variable hydraulic components and transmission components with high technological content belong to precision machinery and require every aspect of the machining process to be nuanced. It is difficult to make detailed regulations for general process regulations. German production of hydraulic parts is as meticulous as the completion of an artwork, meticulous, so Rexroth, Linde hydraulic parts have become internationally recognized first-class products, the assembly of these products requires a dust-free purification environment, indoor Humidity temperature is also required. In fact, there is no important degree of distinction between the parts and components for the main engine. Which part has its own function and role, all of which require precise management and processing, strict process control and inspection, and only in this way can we create a world-class product.
Third, promote agricultural digging product upgrades, energy saving.
For energy saving and emission reduction of construction machinery, we must pay attention to the agricultural excavation in the excavator industry. In 2007, a total of more than 80,000 farmer diggers were sold in the country, which is even larger than the sales volume of standard excavators. However, there are many inherent defects in agricultural excavation, such as poor performance, many faults, low operating efficiency, and high energy consumption. Yao Guangshan, a member of the kit consulting division, after a large number of investigations and researches, put forward the view of developing economical and practical small digging. This kind of full-track crawler type digging, diesel engine, variable hydraulic system and other components are all domestically configured, and the selling price can be controlled at 200,000 yuan. Within that, the performance will be significantly higher than that of the agricultural digging, and it will be more than 20% more energy than the agricultural digging. If after several years of development, the half of the agricultural digging sales is replaced, the significance of energy conservation is very significant and cannot be ignored. From another point of view, the current domestic hydraulic components are just able to adapt to the supporting level of this excavator. Of course, with this platform, the level of hydraulic components is gradually increased. The ultimate goal is to achieve the support of high-end hydraulic excavators. This cannot be achieved. Shaken. It is understood that some companies have already developed in this direction.
The national economic construction requires the rapid development of the construction machinery industry. The national industrial policy requires that the high-tech products of the construction machinery accessory industry support the domestic main engines as soon as possible, substitute imports, and make the industry enter a sound development track. The situation and environment have never required us to communicate more closely, communicate and cooperate with the host industry as we do today. The localization of excavator support has made initial progress and is fully consistent with the current goal of developing energy-saving and emission-reducing engineering machinery.
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