Development of spinning machine equipment

      The spinning machine is the main equipment for metal spinning. In order to facilitate the smooth progress of the metal spinning process, many supporting equipments and devices are needed, such as a melting electric furnace, a casting device, a turning machine tool, a heat treatment furnace, a combined jig, a shaping machine, and the like.

The countries that mainly produce spinning machines abroad are the United States and Germany. Germany used the spinning process in the civil industry earlier than the United States. The early-stage spinning machines were medium and small. In recent years, large-scale spinning machines have also been manufactured. Spinning machine tools can be divided into horizontal and vertical types. They are widely used in foreign horizontal spinning machines, but from the perspective of development, vertical spinning machines are more promising, and the rigidity of vertical spinning machines Large, small footprint, because the center of gravity of the workpiece coincides with the center line of the machine tool spindle, the product has high precision, and the core mold and workpiece are easy to load and unload, and can be installed on the production line.

      Spinning is a process of metal point-by-point deformation. It does not belong to the high-speed deformation process, but the spinning line speed can also reach 1200~1500m/min. Therefore, the spinning machine is required to have fast stroke, sufficient rigidity and shock resistance. What is more prominent is that the rotary wheel seat is required to withstand sufficient radial and axial forces, and the main shaft has considerable power. Rotating wheels are generally used in 2~3, and some small spinning machines are single-rotating wheels. The rotating wheel is symmetrically mounted around the main shaft, and the balance of the radial force acts to reduce the runout and deflection of the mandrel during the machining process. The feed of the rotary wheel is preferably stepless speed regulation.

At present, the general trend of foreign spinning machines is toward large-scale, serialization, high-precision, multi-purpose and automation.

      1. To the large-scale, high-precision development Due to the needs of cutting-edge technology, large-scale high-precision spinning machines have been developed. In the United States, a number of heavy-duty spinning machines were built in 1966, among which "Green Giant" is the largest spinning machine in the current time. It can rotate φ6m and steel plate with a thickness of 127mm. Germany has also produced a large vertical spinning machine with a φ6m head. It is known that there are spinning machines that can spin φ7.6m parts abroad.

The development of a multi-purpose spinning machine can perform ordinary spinning, strong spinning, finishing, crimping, necking, trimming, etc. The APED series of machine tools from Leyfield, Germany Spin-type machine tools.

      2. Hot and cold spinning machine The existing powerful spinning machine is equipped with a heating device, a temperature measuring system, a cooling device for the main shaft and the rotary wheel, and a hydraulic oil constant temperature control device for hot spinning. The heating device generally uses an electronic device to automatically control the blank temperature.

      3. The spinning machine has been serialized, for example, the spinning presses of PLB, ATM, APED, ST, VDM, BOD, etc. manufactured by Leyfield, Germany, and the Floturn series of spinning machines manufactured by the American Lodge-Sipley Company. Hydrospin series spinning machines made by Cincinnati.

      4. Adopting automatic control In order to improve production efficiency, the spinning machine is equipped with a hydraulic profiling device, a digital control system and a television monitoring system, so that the operator does not need to approach the rotating workpiece. At the beginning of the 1960s, a semi-automatic mechanism was used on the spinning machine, and the loading and unloading was manual. Many of the newly designed spinning machines are designed for automatic control and reduce costs by 50%.