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Highlights
One of the highlights of this year's CNC machine tool exhibition is the tall, heavy machine tool booth. The technical level of the exhibits, the well-made appearance and the layout of the booths all give people a fresh feeling. It shows that China's heavy-duty machine tool industry is gradually moving toward strength, and it is just around the corner to enter the world.
First, some manufacturers have changed their traditional advantages in the past, and concentrated on the launch of multiple, multi-variety heavy-duty machine tools. Such as: Shenyang Machine Tool Group, Dalian Machine Tool Group formed a new heavy machine tool production base. Its exhibited varieties include heavy-duty machine tools such as CNC gantry milling and milling machines, CNC floor milling and boring machines, CNC vertical lathes, CNC large-scale machining centers, and CNC large-scale special-purpose machine tools. Its technical level is at the forefront of high-end CNC heavy-duty machine tools.
Second, some manufacturers have begun to enter the broader product development field and enter the ranks of multi-variety manufacturers.
For example, the Kunming machine tool changed to the traditional products of horizontal boring machine and floor-type milling and boring machine. This year, the XH2740 fixed beam gantry mobile boring and milling machining center was launched. The gantry movement distance is 18m, the machining height is 2500mm, and the spindle speed range is 5~1600r/min. Work surface 4000mm × 18000mm.
Due to its wide range of processes and strong composite capabilities, the gantry type boring and milling machine has been accepted by the user industry and has a large market demand. Therefore, it has been developed and manufactured by machine tool manufacturers. There were 23 gantry-type boring and milling machines at the exhibition, which accounted for 32.86% of the total number of heavy-duty machine tools.
Qinghai Huading Heavy Duty Machine Tool Co., Ltd. is also a modification of the traditional CNC horizontal lathe. This year, the XH2125 dynamic beam CNC gantry machining center was newly introduced. The table size is 2500mm×5000 mm. The two-axis drive synchronous compensation technology ensures that the beam lifting W-axis runs safely and reliably, with high smoothness and high precision. The maximum spindle speed is 6000~12000r/min, the positioning accuracy is 0.005mm/300mm, and the repeat positioning accuracy is 0.003mm/500mm. The machine tool can realize 5-axis linkage processing.
Qinghai Huading Heavy Duty Machine Tool Co., Ltd. also exhibited the newly developed mast diameter? 160 mm CNC floor milling and boring machine new products.
Third, China's private enterprises have developed rapidly in recent years. Ningbo Haitian Precision Machinery Co., Ltd. and Rifa Precision Machinery are their representatives. Ningbo Haitian is a manufacturing enterprise specializing in the production of CNC machine tools and machining centers. It has formed a series of large-scale and heavy-duty CNC machine tools such as Longmen vertical machining center, horizontal machining center, CNC floor boring and milling machine and CNC vertical car.
Fourth, a total of 11 large and heavy-duty CNC gear processing machines were exhibited at this exhibition, which was not seen in previous exhibitions (the heavy-duty machine tools with a diameter of φ2000mm or more were processed according to the regulations). In addition to the traditional gear machine tool manufacturers, the exhibitors have newly added new manufacturing enterprises mainly based on colleges and universities, such as Hunan Zhongda Chuangyuan CNC Equipment Co., Ltd., Nanjing Gongda NC, Xinxiang Risheng, etc. The exhibits include hobbing machines. Milling machine, gear grinding machine, gear shaping machine and spiral bevel machining machine, all of which are CNC machining machines.
From the technical characteristics of all exhibiting products, we can show that China's heavy-duty machine tools will develop high-end CNC and more versatile and complete sets of technology that meet the user's process requirements, and drive new breakthroughs in supporting functional components.
High-end CNC new products with multi-functional composite processing become the development direction of heavy-duty machine tools
With the unprecedented upgrading of the national equipment manufacturing industry, the requirements for high-end CNC heavy-duty machine tools are quite urgent. Emerging industries such as nuclear power, wind power, large aircraft manufacturing, high-speed railway, low-energy consumption-reducing industries, etc., have high demands on special machines and complete sets of processing equipment. Special materials, ultra-thin parts, and special-shaped curved parts are all proposed for high speed, high precision and many Shaft composite machining requirements. At this year's CNC machine tool exhibition, many high-level heavy-duty machine tools were displayed.
The CHA5830 fixed beam double-column vertical turning center exhibited by Jingyi Machine Tool is a novel movable structure with double table developed on the basis of processing 3 m diameter CNC vertical lathe. It has high performance and high precision, and its maximum turning diameter is 3000mm, the machine has a double-rotary table, which is convenient for replacing parts during machining. The maximum moving speed of the table is 25000mm/min, the table speed is 120r/min, the double turning tool holder and the double-disc tool magazine are equipped with the left and right tool measuring devices. It is a typical embodiment of a machine with high power, high torque and high efficiency.
This structure changes the working mode of the traditional vertical lathe worktable, and expands the composite machining function of the machine tool, creating a development space for the vertical lathe.
The XKA28105×300 gantry mobile CNC boring and milling machine produced by Beijing No.1 Machine Tool has a machine width of 10500mm and a machining height of 7500mm. It has a rotary table with a rotary diameter of 9500mm. The internal and external machining of the parts can be carried out on the basis of the gantry milling machine. This machine tool is currently the largest gantry mobile boring and milling machine in China, and it is also one of the "high-end CNC machine tools and basic equipment major projects" in China.
At present, there are as many gantry-type boring and milling machines in China that can provide processing widths of more than 5000mm, which fully demonstrates the strength of China's heavy-duty machine tools.
The SUC8210 cylinder head cooling water hole heat-resistant block processing CNC machine tool developed by Shenyang Machine Tool Group is a high-precision, high-efficiency and high-flexibility CNC machine tool developed for machining marine diesel engine cylinder liners, cylinder head cooling water holes and heat-resistant block milling. The machine uses a drilling process with a gun drill and a suction drill to perform deep hole drilling on the workpiece (length to diameter ratio ≥ 10:1). The machine is a double processing unit structure, which can meet the different processing requirements of the same workpiece and ensure the production efficiency in the case of one-time clamping. The axial and radial machining units of the machine tool and the A-axis indexing fixture are driven by servo motors, which are highly flexible and easy to change. The successful development of such machine tools has filled the gap in the domestic similar CNC machine tools.
The XH2125×40 moving beam gantry boring and milling machining center exhibited by Jinan No. 2 Machine Tool Co., Ltd. is equipped with two dragging worktables, which are arranged on the fixed brackets on the left and right sides of the front section of the machine bed, each bracket along the lateral direction (Y axis Direction) is arranged with 4 guide rails. Each of the drag-and-change worktables can be moved to the work pallet along the four lateral guide rails. After the shifting workbench and the work pallet are positioned and clamped, the longitudinal feed motion and milling of the worktable can be realized. This dual table structure is suitable for batch part processing. It can save auxiliary time and improve work efficiency.
The DL series CNC heavy-duty horizontal milling lathe exhibited by Wuhan Heavy-duty Machine Tool Group Co., Ltd. is a major special product urgently needed for national key projects. DL250 super heavy-duty CNC horizontal milling lathe, the maximum load capacity of the two tops is 500t, the maximum turning diameter is 5000mm, the maximum workpiece length of the two tips is 24m, the front and rear spindle bearings are static pressure bearings, the bearing capacity is large, no wear, high precision, the carrier bracket is static. The pressure bracket has a small friction coefficient and a large carrying capacity. The machine tool can process nuclear power rotors, turbine rotors, giant rolls, giant ship rudder shafts and other parts. The machine tool is currently the world's largest standard horizontal lathe, and is also one of China's "high-end CNC machine tools and basic equipment major projects." The DL series includes a range of rotary diameters from 1250 to 6400 mm. The exhibiting products are DL125A CNC heavy duty horizontal lathe with a diameter of 2500mm.
The SKPC250/2000 large-scale tubular paving machine exhibited by Qiqihar Second Machine Tool Group Co., Ltd. is a direct application object with high-volume automatic manufacturing of large curvature components. Large-scale composite component laying machine design and manufacturing complete set technology, can lay the foundation and provide equipment for large aircraft fuselage, wing, super large composite material, wind power blade automatic laying and manufacturing, directly used for designing and manufacturing airfoil siding Belt forming system for automatic laying of large aircraft and very large wind turbine blades. The machine tool adopts horizontal layout, which consists of mechanical host, electrical system, temperature control system, tension control system, software, compaction system and ultrasonic trimming system. Combines automatic strapping and automatic winding. Circumferential winding and longitudinal, spiral layup can be achieved. The maximum machining diameter is 2500mm, the maximum machining length is 20000mm, the winding speed is 70m/min, and the number of linkage axes is five axes.
YK73400L CNC forming gear grinding machine exhibited by Qizhong Numerical Control Equipment Co., Ltd. has a maximum machining tip diameter of φ4000mm, a maximum modulus of 40mm, and a machining accuracy of up to 3 standard accuracy. This is a new product developed by Qizhong following the development of a 5m CNC gear hobbing machine and a CNC milling machine with a diameter of 3500mm. Qizhong CNC keeps up with the market demand and develops new CNC machine tools in time according to the requirements of the user industry. From the product variety, specifications and quantity, it is in the forefront of the heavy machine tool industry. In the machine tool exhibitions in recent years, Qizhong CNC has launched new products to exhibit, giving people a refreshing feeling. The company recognizes that the needs of the user industry and the processing requirements of the machined parts are the tracking points and footholds of product development in the heavy machine tool industry today. Only by constantly tracking the technical development of the user industry and the requirements of processing methods can we meet the needs of the user industry and constantly create and develop new products.
Advantages and disadvantages of China's heavy machine tool industry
In recent years, heavy machine tool manufacturers have paid more and more attention to improving the ability to provide key equipment for national key construction projects, and have developed and developed a number of major equipment needed for major engineering projects. For example, a 28m CNC vertical milling lathe with independent intellectual property rights; a CNC heavy-duty horizontal lathe with a diameter of 5000mm and a load of 500t; a 320mm CNC floor-mounted milling and boring machine with a diameter of 11mm; a double-gantry mobile CNC boring and milling machine with a processing width of 11m has created the world. The record of the largest processing specifications has changed the key equipment needed for the construction of key projects in China mainly relying on imports, spending a lot of foreign exchange in the country, and subject to the situation of people.
In order to meet the market demand, enterprises have increased investment in technological transformation, and established reliable technical guarantees for large-scale processing equipment required to undertake national key projects, which has greatly shortened the development and manufacturing cycle of new products. At the same time as the company's own technological transformation, it also trained the technical development team. The technical transformation self-made project itself is a CNC product that can be selected by the user.
It is worth noting that the market prospects of heavy-duty machine tools are greatly affected by economic and social development, and have certain limitations. The demand industry is relatively narrow and the steps are high. The market demand is greatly affected by national policy factors, and the market reaction is relatively lagging. . The capital required for heavy-duty machine tools is relatively high, the return period is long, and the long service life of heavy-duty machine tools leads to long replacement cycles, which restricts investment. Therefore, if the current investment in heavy machine tool investment is not regulated, it will lead to industry imbalance, increase the risk of corporate investment, and finally create a follow-up crisis for industry and enterprises.
During the “Twelfth Five-Year Plan†period, the demand for ordinary and medium- and low-end CNC machine tools in the heavy-duty machine tool user industry will tend to be flat, mainly for the addition of key equipment. Import or domestic production is a measure of technical level, which is provided to China’s heavy industry. The key opportunities in the development stage of the machine tool industry are also the ability to test the industry's ability to seize opportunities, and it is also a challenge to the manufacturing capabilities of China's heavy machine tool industry. The market demand for high-end CNC heavy-duty machine tools is an indisputable fact. The key is whether domestic manufacturers can develop and manufacture high-end products that meet the needs of users. We must not only achieve the world's largest heavy-duty machine tool specifications, but also limit the machine tool accuracy, reliability and technological advancement. The development trend of heavy machine tools and the ability to occupy the domestic market lies in the key equipment that meets the needs of users. This is the top priority and unshirkable historical responsibility of the heavy machine tool industry during the “Twelfth Five-Year Plan†period.
Analysis of the advantages and disadvantages of China's heavy machine tool industry
The 6th China CNC Machine Tool Exhibition (CCMT2010) was successfully held in Nanjing on April 12-16, 2010. The exhibits of heavy-duty machine tools once again showed that China's large and heavy-duty machine tool manufacturing technology has made new breakthroughs. The number of exhibitors and exhibitors have reached new highs. According to preliminary statistics, a total of 70 heavy-duty machine tools participated in the exhibition. Among them, there were 23 exhibitors of gantry type boring and milling machines, accounting for 32.86% of the total number of heavy-duty machine tools, 18.57% of trampoline products, and 15.71% of gear processing machines.