Technical field:
The utility model relates to a steel bottle necking machine, in particular to a steel bottle thermo-spinning necking machine, which belongs to the technical field of pressure vessel manufacturing equipment.
Background technique:
According to the applicant’s understanding, the steel cylinder turning template and closing machine is the main equipment for the existing steel cylinder closing. When this type of closing machine works, the pre-heated preform is clamped on the main shaft, driven by the motor to rotate at high speed, and then rotated by the template <90°, and the bottle shoulder is gradually spun into an approximate hemispherical shape to complete the closing operation. In this process, there is always sliding friction between the template and the preform, so there are the following two defects in mass production. One is that the shape of the bottle shoulder changes with the wear of the template surface, which cannot guarantee the engraving of the stencil carving machine in the subsequent process. Clarity; second, the finish of the bottle shoulder is not good, and the groove marks are more serious, which often requires additional polishing procedures. For this reason, the Chinese patent with application number CN 02264425. 3 proposes a roller-type steel cylinder thermo-spinning closing machine. The bottom frame of the machine is equipped with a turning template gear box and a turning template shaft extending from the turning template gear box. An L-shaped turning plate is fixed on the upper frame, a spindle box whose rotation axis is basically perpendicular to the axis of the turning plate is installed in the middle of the base frame. A swing arm is fixed on the extension shaft of the swing arm shaft seat, a roller shaft seat is installed on the swing arm, and the roller shaft end in the roller shaft seat is fixed with a roller.Because the roller moves along a specific arc trajectory during the spinning process, the shape of the bottle shoulder after closing is hemispherical, which is always consistent, and there is rolling friction between the roller and the preform, so the surface of the bottle shoulder has a better surface finish. However, practice has proved that the above-mentioned roller-type steel cylinder thermal spinning necking machine has the disadvantage of inconvenient clamping.
