Cold Pilgering Mill

Structure and characteristics of equipment:
1,Feeding device
The feeding device is composed of a feeding platform and a raceway, and a nylon plate is laid to protect the tube blank. When the core bar clamping three claws open, hand to the body of the tube before the trolley, clamping, start rolling mill.
2,Core Bar Chuck Assembly
The core bar chuck adopts hydraulic pressure form. The loosening and clamping of the core rod are accomplished by the hydraulic cylinder. The axial adjustable stroke of the core bar chuck is ± 35mm to ensure the dimension requirement of the finished pipe.


3,Rotary feed mechanism
The rotary feed mechanism is controlled by a servo motor. The size of the rotation angle and the size of the feed by changing the number of motor to achieve stepless speed regulation. The rotary feeding mechanism is equipped with a feeding motor and a rotary motor, through a group of worm and worm gear transmission mechanisms respectively, the tube blank is intermittently fed and rotated.
4,Center part
The middle bed is located between the rotary feeding box and the main box. The bed is equipped with a tube blank chuck, two sets of inner and outer brackets, bearing block, screw Rod, polished Rod, proximity switch, etc. . The screw is made of 42CrMo. ZQSn6-6-3 copper plate structure is adopted in the chuck and the slide plate on the bracket of the tube blank in the bed. The bracket supports the screw Rod, the core rod and the tube blank. In the process of Tube Rolling, the tube blank is fed into the tube blank intermittently at the back end of the tube blank. When the tube blank is fed into the tube blank, the tube blank into the roof sleeve must be changed to suit the different specifications of the tube blank. In the process of stopping and charging, the billet can be moved into the trolley to control the rapid advance and retreat and stop at any position of the middle bed.
5,Base case
There are frame, roller assembly, power transmission gear, connecting Rod, billet inlet chuck and finished product outlet Chuck. The box body uses the welding piece, the welding piece carries on the anneal processing and the leakage test. The gear box is equipped with a closed cover, which can prevent the splash of process lubricant and water spray out of the machine and reduce noise. Gear material: big and small gear forgings, using carburizing, tooth surface quenching, grinding technology. Connecting rod adopt 45 # , normalizing.
Connecting Rod Pin, gear shaft material for 40Cr,
conditioning treatment. Rack material: 45,
tooth surface quenching treatment.
Machine Base Guide Rail:
Adopt Integral Guide Rail, material is HT300 casting.
The eccentric gear is lubricated with thin oil and the bearing is lubricated with grease.
The frame is made of 40CR,
which is made of ZQSn-6-6-3 synchronous gear.
  


6,Discharge system
The discharging system is composed of v-shaped groove and discharging platform.
The surface of the discharge platform is protected by soft material to prevent the surface scratch of the pipe.
The v-shaped trough and the discharge platform are each a welded body. The discharge length can be designed according to the user's requirements. An oil pan is arranged under the discharge platform to solve possible residual liquid in the pipe.
7,Main drive mechanism
It is mainly composed of Z4 type DC motor, belt driving device, support and so on.
The large belt pulley is driven by a DC motor through a v-belt on a small belt pulley. The small belt pulley and the main motor are fixed on a base with an adjustable screw to adjust the tightness of the belt. Large Belt pulley through static balance test, to ensure the smooth operation. The braking of the unit adopts electric energy consumption braking.
8,hydraulic machinery
The hydraulic system comprises a hydraulic station oil pump, a fuel tank device, a corresponding electromagnetic control valve and a pipeline. Hydraulic System through pressure control valve, flow control valve, solenoid valve to control the accuracy of each hydraulic cylinder to ensure the normal operation of the whole rolling system. The hydraulic cylinder comprises a core Rod Chuck Oil Cylinder (1 medium and low pressure) .
9,Process Lubrication System
The cooling pump is mounted on a separate oil tank; the oil is delivered to the head by a shunting mechanism to provide process lubrication and cooling of the tube blank, as well as lubrication of the guideway, head slide and gear rack in the frame.
10,Electrical Control System
The main motor speed control system and the SERVO motor drive system controlled by PLC are composed of electric control cabinet and operation panel. The Control Center of the system is Plc.. The whole electrical control system mainly consists of transmission control system, rotary feed control system, auxiliary control system and so on.