Necking machine

Necking machine is a forming process to reduce the diameter of the end of the tube blank. The flared shape can be conical or cylindrical. The tube blank enters the deformation zone under the action of axial force, and the flared plastic deformation of tangential tension is generated in the deformation zone, and then enters the stable deformation zone and takes shape

by setting a tubular throttle valve on the main cylinder circuit, the working speed of the main cylinder can be adjusted; A superimposed hydraulic control check valve is set on the circuit of the pressing cylinder, so that the die is not loose during the clamping process; Superimposed two-way throttle valves are set on the circuits of shift cylinder, limit cylinder and axial positioning cylinder to adjust the two-way movement speed of the above cylinders. The shift oil cylinder and the limit oil cylinder cooperate to use the conversion station, so that the station conversion is convenient and accurate, and the processing quality of pipe fittings is improved

usage of necking machine:

structure: weld a chassis with channel steel, and the power end is equipped with motor, reducer and clamp head (for clamping pipe, it can be replaced by lathe chuck). The other end is installed with a support seat (openable), and the outer end of the support seat is fixed with a heating ring (8-10 nozzles, which are welded on a copper pipe ring by gas welding against the nozzle). Outside is a movable support, on which an alloy mold is installed

usage: fix the pipe on the pipe shrinking machine and turn on the heater (ring). After the temperature is reached, push the alloy die, and the shape of the pipe head meets the requirements. The whole process takes about 15 minutes

the necking machine adopts heat treatment process to upgrade the efficiency and stabilize the performance

the necking machine continuously compresses and relaxes the spring indenter fixed on the front plate. Put the installed joint into the appropriate position in the middle circular hole of the spring indenter, start the motor, drive the oil pump to supply oil, control the reversing of the electromagnetic reversing valve, drive the cylinder piston to move forward, and compress the spring indenter with the same taper through the pressure sleeve with inner conical hole, so as to achieve the purpose of pressing Press the mold opening button, the piston drives the pressing sleeve in the opposite direction, and the moving spring indenter recovers. At this time, the pipe can be taken out of the pipe locking machine

the necking machine is simple to operate. The necking of steel pipes is formed at one time. All molds are quenched from 45 # steel, with long service life and processing speed of 3000-5000 pieces