In the wire and cable industry, stranded wire is the basic process of producing overhead wires and conductive cores, and it is also one of the main links of quality control. There are many types of twisting machines. One of them is the frame winch, which is almost 25 years old. The introduction, digestion, absorption, innovation and improvement of the frame-type stranding machine have effectively promoted the development of the frame-type stranding machine wire industry. Application and promotion. There is still a lot of work to be done for domestic frame machines to reach the international advanced level.
Wire is the basic process of producing overhead wire and conductive core of power cable, and it is also one of the main links of quality control. There are many types of twisting machines. From the structural point of view, there are cage type, disc type, fork type, frame type, tubular type stranding machine, etc.: from the number of strands, there are 7, 12, 18, 24... 54 turns. The stranding machine is divided into 200, 400, 500, 60, 710, and 800 type stranding machines from the diameter of the pay-off reel: according to whether there is untwisting and transmission, it can also be divided into different types of equipment, modes, speeds, etc. The basic types of laying and closing equipment fall into two categories. One is the stranding equipment represented by the frame type stranding machine, which rotates around the center of the reel; the other is the reel located in the center of the equipment, and the single wire is twisted by the tubular stranding machine which rotates around the center of the equipment. equipment.
For the rigid frame stranding machine, the spool is generally divided into four grids, and now there are three or five grids. The central axis is not affected by the weight of the spool, and the spool is 72° to the circumferential direction of the grain cage. °, 90° or 120° angle distribution is uniform, the turning radius of the winch cage is small, and the speed is more than twice that of the cage winch machine of the same specification. The torque cage does not need support wheels, and the two ends are supported by large bearings. The noise of the equipment is low, and the coils can be raised and lowered individually or as a whole. It adopts pneumatic or electric clamping, which is easy to operate, greatly shortens the auxiliary time and improves the production efficiency. The disadvantage is that there is no untwisting, and it is suitable for pressing round strands and fan-shaped strands. Compression pre-twisting of composite conductors, copper strands, aluminum strands, steel-cored aluminum strands, and split conductors.
The author has successively visited and investigated several major frame machine design and manufacturing units in China: Shanghai Electric Cable Research Institute, Hefei Shenma Technology Co., Ltd., Shanghai Hongdeli Machinery Manufacturing Co., Ltd., and Shanghai Electric Co., Ltd. , Deyang Dongjiagang Electromechanical Equipment Co., Ltd., etc.
The earliest 630 frame stranding machine in China was imported from Italy by Guiyang Wire Rod Factory in 1983, and the frame stranding machine was designed and manufactured by Dongfang Electric Machinery Factory (the predecessor of Deyang Dongjiagang Electromechanical Equipment Co., Ltd.) on the basis of 630. Absorb and digest imported equipment. A 12+18+24/630 frame machine used electric centralized upper and lower plates at that time. At that time, the domestic wire and cable industry was booming, but it was difficult to find cable manufacturers who wanted such equipment. In 1986, it was finally sold to Jiangxi Xinhua Nonferrous Metal Products Factory. It is conceivable that the application and promotion of domestic winches at that time. This is quite difficult.
The earliest 500-type frame-type stranding machine in China was in 1983. Shenyang Cable Factory introduced a batch of second-hand equipment through Belgian Gothic Company and introduced a new type of 12+18+24/500 frame-type stranding machine; The Cable Research Institute jointly developed a 500-frame stranding machine.
In 1985, Shanghai Electric Cable Research Institute and Shanghai Jinli Electric Machinery Factory (the predecessor of Shanghai Hongdeli Machinery Manufacturing Co., Ltd.) jointly developed four 12+18/500 frame-type stranding machines, which were supplied to Guangdong, Guiyang, Baosheng and other places. It is adopted by Lanxi and other cable factories, and has been recognized and gradually promoted by cable manufacturers.
