Structure and characteristics of equipment:
1,Feeding device
The feeding device is composed of a feeding platform, a feeding raceway, a chain wheel transmission device and a pipe jacking. After the core rod clamping three claws open, the starting button, the motor through the sprocket transmission device, driving the pipe jacking cart forward, by the pipe jacking installed in front of the pipe jacking cart to send the billet into the bed before the cart, starting the sprocket drive in the opposite direction to exit the pipe jacking, clamping the core rod with the core rod and clamping the three claws, starting the mill to carry out the rolling, at the same time pushing the pipe back to the back limit, through the cylinder pulling the material pulling mechanism to shift the billet pipe to the material feeding raceway, the pipe jacking truck slowly delivers the pipe blank to the front limit position and waits for the next feeding.
2,Main drive
It consists of Z4 DC motor, belt drive, hydraulic Disc brake and support. The utility model is used for driving the working frame of the cold pipe rolling mill and making it reciprocating. The system uses three-phase silicon controlled rectifier, Z 4 series DC motor to drive the trigonometric belt, which is transmitted to a pair of driving gears in the chassis through a large pulley. The driving gears are engaged with the crank gears, then through the crank and connecting rod drive the work rack for reciprocating movement. In order to enable the rack to stop at a set position (the small opening of the roller) , a hydraulic Disc brake is installed on the support and connected to the motor shaft. To facilitate belt tightening, the Z4 DC motor, belt drive, and hydraulic Disc brake are mounted on a movable support.
3,Headstock unit
The box body uses the welding piece, the welding piece carries on the anneal processing and the leakage test. An upper cover is provided on the chassis to prevent the splash of the process lubricant and reduce the noise. The power transmitted from the driving part is transmitted to the driving shaft through the coupling, through the driving helical gear, driving the big connecting rod installed on the large eccentric helical gear, the other end of the big connecting rod is connected with the rocker rod, thus making the rocker mechanism swing back and forth. Gear material: large gear ZG310-570. Pinion forgings for 40Gr. Connecting rod adopt 45 # , normalizing. Connecting Rod Pin, gear shaft material for 40Cr, conditioning treatment. The eccentric gear is lubricated by splash and the bearing is lubricated by grease.
The upper end of the rocker is connected with the machine head through an upper connecting rod and the middle connecting Rod is connected with the roller cage. When the rocker is shaken, the sleeve of the machine head and the roller cage are driven to move respectively, so that the roller and the slide track are in relative motion, when the rollers roll on the slope of the slide, the pass formed by the three rollers varies periodically from large to small (positive stroke) or from small to large (reverse stroke) . This round-the-clock reciprocating movement is the multi-roll cold mill rolling process. The head slide plate is made of QAL-9-4 copper, the body sleeve and trolley are made of integral cast steel, and the material is ZG310-570 roll material is GCR15.
4,Rotary feed mechanism
The rotary feed is controlled by Servo Motor. When the machine head moves to the back starting point, the signals are sent to the PLC through the sensor, and the PLC respectively instructs the pipe chuck in the middle bed to rotate and feed, in order to meet the requirements of head rolling pipe. The rotation angle is kept constant each time, stepless adjustable; the magnitude of feed quantity is realized by PLC control Servo Motor rotation angle, and stepless adjustable. The box body is welded by steel plate, and the whole body is tempered.
5,Center part
The middle bed is located between the rotary feeding box and the main box. The bed is equipped with a pipe blank chuck, two sets of inner and outer brackets, bearing housing, screw Rod, polished Rod, proximity switch, etc. The material of screw rod: Special Screw Rod Material YF45MnV; ZQSn6-6-3 copper plate structure is adopted in the chuck and slide plate on the bracket of the inner pipe body of the lathe bed; In order to increase the stability, the bed support uses 4 coaming to weld into the square box.
6,Core Bar and chuck device
The core rod and the chuck device are composed of a plug, a core rod and a joint. The plug material is H13, and the Mandrel and rod material is 45 # cold-drawn thick-walled tube. The plug and the mandrel are connected by screw thread and adhesive rotating and twisting. The core bar chuck uses the hydraulic chuck form, the core bar loosens, the clamping is controlled by the electromagnetic valve to complete
7,Discharge bench
The discharging system is composed of roller frame, discharging platform, oil receiving plate (made by customers themselves) and u-shaped aggregate frame. The discharging platform is each welded body, and the discharging platform is equipped with anti-scratch lining board to prevent the pipe material from being scratched and bruised, which plays the role of protecting the pipe material.
8,Process Lubrication System
The process lubricant is made up of rolling oil (reusable) , oil tank, pump-motor unit, pipe fittings, etc. . It is used to cool and lubricate roll pass in rolling process, and also used to lubricate the guide rail and the slide plate in the frameThe process lubrication station is used to cool and lubricate the work cone, roller, slide plate of the mill, screw rod of the bed, guide rail and roller bearing in the rolling deformation zone of the steel pipe.
9,Electrical System
In order to meet the technological requirements of the rolling mill, the Control Center of the system is Plc.. The whole electrical control system mainly consists of man-machine interface, host control system, rotary feed control system, pneumatic control and auxiliary control system. All low-voltage switches, contactors, relays, etc. are selected domestic first-line products.
The man-machine interface uses a 10-inch touch screen. Some necessary parameters of equipment operation are input to PLC through man-machine interface, and then realized by PLC controlling the corresponding motor or solenoid valve. When the equipment is running, the PLC collects the fault or alarm information through each controller, sensor and so on, and finally displays it on the man-machine interface. So that the operator can quickly and accurately identify and solve the problem.
){kind=link}