China Finishing Mill

Product description:
LD3-8 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 ModelLD3-81Hollow sizeOutside diametermmφ3.5~φ9.5Wall thicknessmm0.3~1.5Lengthm1.2~32Tube sizeOutside diametermmφ3~φ8Wall thicknessmm0.2~1.2Lengthm≤63 Max. elongation ratio of rolling It depends on the material4Stroke rate of roller carriagestr./min.50~1105 Stroke length of roller carriagemm4006 Length of hollow feedmm0~47 Rotating angle of hollow during feed Deg.47-728Rotate-and-feed mechanism Servos9 Method of loading/unloading manual10 Number of rollers 311Center height of hollowmm85012 Power of main motorKW7.5
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,Main case
The reciprocating movement of the main engine head is supported by a guide rail with a triangle rib on one side and a flat guide rail on the other side. The structure of the head box is required to be firm and free from distortion. The guide rail and the head box are connected by reliable positioning. After the head is assembled, the operation is stable and there is no vibration, blocking or deflection, the reciprocating movement center line of the machine head should keep consistent with the rolling center line.
Used for transmission of main engine head, all connecting Rod and pin are made of 45 # steel, big connecting Rod and two rocker are made of 45 # steel plate to ensure bending and tensile strength. The crank pin to which the gear is connected with the big connecting rod is positioned by a cylindrical pin.


4,Rotary feed mechanism
The rotary feed is controlled by Servo Motor. Stepless speed regulation can be carried out, set on the operating table. The screw Rod and the polished rod rotate flexibly, the camber does not exceed 0.5 mm per meter, the working trolley and the bracket run smoothly without blocking.


5,Center part
The middle bed is located between the rotary feeding box and the main box. The bed is equipped with pipe blank chuck, two sets of inner and outer brackets, bearing block, screw Rod, polished Rod, proximity switch, etc. ZQSn6-6-3 copper material is used in the chuck and the slide plate on the bracket.


6,Core Bar and chuck device
The Rod Assembly consists of a plug, a Mandrel and a joint. The plug material is H13, the plug and the Mandrel are connected by welding, the Mandrel Chuck Adopts Manual three-grip Chuck, and the Mandrel is loosened and clamped manually.
7,Discharge bench
The discharging system is composed of roller frame, discharging platform, oil connecting plate and u-shaped aggregate frame. Discharge platform above are equipped with anti-scratch lining board, in order to prevent tube scratch, bruise, play the role of protecting the tube.
8,Process Lubrication System
OIL SYSTEM DEscriptION: The oil tank is equipped with two JCB-45 oil pumps, one of which is connected with the oil outlet pipe of the oil pump and the oil inlet pipe of the gearbox to supply lubrication of the gearbox, the other is connected with the oil inlet pipe of the chassis to supply lubrication and cooling of the engine head and chassis.
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.