The bending machine belongs to the bending correction machine in eight categories of forging machinery. Its development has gone through the development process from mechanical to hydraulic, to CNC.
At present, the world's leading manufacturers of coiling machines mainly include Swiss HAEUSLER, German SCHAFER, Italian PROMAUDAVI, MG, FACCIN, SERTOM, BODRINI, Swedish ROUNDO, Japanese KURIMOTO, and British HUGH SMITH.
The Swiss HAEUSLER four-roller bending machine is well-known. Its specifications have reached 78000KN, the thickness of the plate is 250mm, the width of the plate is 4000mm, and the remaining straight edge is only 1.28 times of the plate thickness.
Italy's PROMAUDAVI, MG company's three-roller and four-roller coiling machines are more common, and the thickness of the large-volume plate of the arc three-roller is up to 140mm.
Germany's SCHAFER, Italy's other companies' horizontal down-regulation three-roller bending machine is more common, and it is one of the ideal models for rolling thick plates and extra-thick plates.
Japan's KURIMOTO's upper roll cross-moving type (upper roll universal type) is more common.
Domestic hydraulic and automatic control technology has made great progress. China is also a country with a large output of coiling machines in the world, but its overall competitiveness is not strong. The main performance is:
1. In terms of product structure, the domestic small-sized and low-grade machines of the coiling machine accounted for a large proportion, and the large-scale coiling machine with a coiling force of 40000KN and a coil thickness of 160mm or more mainly relied on imports.
2. Foreign companies provide customers with overall solutions, and their ability to improve their complete sets of equipment and technology is strong, which satisfies the needs of the market. At present, only the single machine of the coiling machine can be provided at home.
3, domestic low-speed high-torque hydraulic motor, can be directly coupled to the work roll shaft end of the high-torque large-speed planetary reducer and other basic components, can not meet the needs of the development of the coiler.
4, the professional development of the CNC system, the supporting gap is still very large. The domestic manufacturers of coiling machines are mostly small and medium-sized private enterprises, with insufficient technological development capabilities and overall competitiveness.
5. The basic research of the forming mechanism of the coil, especially the formation mechanism of the special thick and high-strength sheet, the simulation of the forming process and the establishment of the mathematical model, need to be strengthened.
Therefore, the development trend of domestic crimping machines is:
1. With the large-scale development of China's chemical, boiler, pressure vessel and other industries, the coiling machine is processing large, extra-large horizontal three-rolled coils for thick plates, extra-thick plates, high-strength plates, composite plates, etc. The direction of the machine is developing. At the same time, large four-roll bending machines have also been developed due to the short remaining straight edges, material saving, forming accuracy and high efficiency.
2. The rapid development of oil tankers, oil storage tanks and other industries requires small coiling machines to develop in the direction of thin edge, extra long shape, multiple curvature and numerical control.
3. The complete set of configuration is realized by the coiling machine as the main processing equipment, thus providing customers with a total solution. For example, the overall solution for wind turbine tower forming is equivalent.
4. Taking the CNC coiling machine as the center, forming the flexible processing unit of the coiling plate is an important direction for future development.
Domestic coiling machine enterprises should start from the above aspects and strengthen and expand the Chinese coiling machine manufacturing industry to promote the process of industrialization in China.
