China Cold Pilgering Mill

Product description:
LD-40 is Three-roll profile-Cold Rolling Mill, The mechanical equipment of rolling mill includes feed device, mandrel parts, hydraulic mandrel chuck, rotating feed mechanism, middle bed parts, frame, working frame, discharge device and main drive mechanism, which can meet the production requirements of stainless steel. superalloy. Titanium and titanium alloys and other black Non-ferrous metal are precision seamless, representative steel grades are as follows:
BreedRepresentative SteelStainless steel1Cr18Ni9Ti,0Cr18Ni9,0Cr18Ni10Ti,316HWaitS607,1Cr21Ni5TiWaitS31803,S32760,S30815,904LWait2169N,00Cr21Ni6Mn9NsuperalloyGH1140,GH3030,GH3039GH536,GH625, GH163Titanium and titanium alloysTA2,TA10,TA15,TA18Wait
The three-roll cold rolling mill is a widely used method in the production of metal tubes. The tubes are fed into a groove which is made up of Mandrel and the pass which moves back and forth periodically. The inner wall is supported by Mandrel, the tube blank can be rolled by the movement of the roller of the fixed pass in the changing groove, and the function of reducing diameter and reducing wall can be realized. The metal has good plastic deformation condition under the action of three-dimensional compressive stress in rolling, and the plastic deformation of the metal is dispersed into the whole effective rolling process by the reciprocating roller, making the best use of the plasticity of the metal, it is the most effective cold working method to make full use of the plasticity of the material, because it can achieve the accurate processing rate with less rolling force and has remarkable micro-deformation and macro-accumulation effect.
Technical parameter:
No.Description UnitTube Cold Rolling Machine ModelLD-401Hollow sizeOutside diametermmφ17~φ48Wall thicknessmm1~4Lengthm2~62Tube sizeOutside diametermmφ15~φ45Wall thicknessmm0.8~3.5Lengthm≤7.53 Max. elongation ratio of rolling It depends on the material4Stroke rate of roller carriagestr./min.50~1005 Stroke length of roller carriagemm564.96 Length of hollow feedmm1~77 Rotating angle of hollow during feed Deg.47-728Rotate-and-feed mechanism Servos Or Direct current10 Number of rollers 311Center height of hollowmm75012 Power of main motorKW37
Structure and characteristics of equipment:
1,Feeding device
The feeding device is a simple feeding rack. Surface laying anti-scratch material for tube blank.
2,Main drive
It is mainly composed of Z4 type DC motor, belt driving device, support and so on. The big belt pulley is driven by a DC motor through a triangle belt pulley 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.
3,Headstock unit
The power from the enclosure drives the main shaft through a coupling, and the main helical gear drives a large connecting rod mounted on a large eccentric helical gear, the other end of which is connected to the machine head and causes the rack to move back and forth in a straight line. Gear material: Big Gear forgings 45 # , 7 grade precision, using hardened tooth surface quenching-grinding process, pinion forgings 45 # .
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-and-round reciprocating motion, to achieve the purpose of rolling. The head slide plate is made of ZQSn6-6-3 copper. The material of body sleeve is ZG270-500, the material of quenching and tempering treatment, the material of fan-shaped guide plate and adjusting inclined iron is polished by 45 # forging parts, and the material of trolley is welded by 45 # steel parts and tempered. The sliding plate between the head sleeve, the roller cage and the guide rail are all made of copper plate. In order to improve the rigidity and reduce the elastic deformation to meet the requirements of rolling high-precision pipe, the big rocker is made of 45 # steel forgings, 45 # steel forging is used for adjusting oblique iron, and forging parts are used for gears. 3 equal parts of body sleeve and 3 equal parts of wire cutting template are used to ensure 3 equal parts accuracy. The eccentric gear is lubricated by oil injection, and the bearing is lubricated by grease. The eccentric gear group guarantees the manufacture precision and the manufacture quality, does not have the noise, the movement balance. The chassis is welded with steel plate. The welded parts are annealed (annealed to remove stress) and tested for leakage (to ensure no oil leakage) . Connecting Rod Pin, gear shaft material for 40Cr, conditioning treatment. To ensure that the bed, machine head parts, the joint surface of the rotary box without oil leakage, oil leakage. Head Guide rail material: CAST IRON, grinding processing.



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, and the alarm will be given when the equipment runs abnormally. The whole electrical control system mainly consists of man-machine interface, host control system, rotary feed control system and auxiliary control system.
Touch screen uses 10-inch industrial control screen. Some necessary parameters of equipment operation are input to PLC through HMI 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.