China Steel Pipe Rolling Machine

Goods name: High-speed Continuous Servo Type of Steel Pipe Rolling Machine (LG 60 GHLS)
1. Features
Equipment advantages:
1) Low maintenance cost
2) Easy operation (One person can operate two devices)
3) Extremely high yield (improved by 60% to 150%)
4) Low failure rate (servo structure)
5) Product with high precision
2. Equipment characteristics :
1)The high-speed equipment of type 1 uses a four-axis equilibrium structure, and therefore the number of rolling is improved by 40% by comparing with that of middle speed. Due to the increase of the continuous feeding and rolling device, the yield is totally increased by at least 60% by comparing with that of the middle-speed shutdown servo equipment.
2)The high-speed equipment of type 2 uses a planetary equilibrium structure, by which the rack can be driven without the connection rod, the inertia force generated in the rolling process can be neutralized further, and the number of rolling and yield can be improved significantly. By taking the type 2 equipment with the high speed of 25 for example, the speed, compared with that of the middle-speed shutdown servo equipment, is improved by 128%, and the yield is totally increased by 148% due to the configuration of the continuous feeding and rolling device.
3)The equipment of type 2 uses the feeding mode of single screw rod, so as to reduce the torque required in the work of the servo motor, and improve the response speed of the trolley.
4)All the high-speed and continuous feeding cold pilgering mills controlled by using 6 to 7 units of servo motor, and therefore the work of each moving part is more flexible.
5)The equipment is provided with a sliding cover, by which the roller can be replaced quickly, the time consumption is reduced, and the yield is improved.
6)The stroke of the rack is increased, the long-stroke rolling is carried out by annular ring type roller, the rotation angle of the roller is large, the groove working section is lengthened, the length of deformation zone is increased, and therefore the uniformity of metal deformation in the rolling process is increased, the feed amount can be increased, and the quality of the finished pipe can be improved.
7)The rotary feed system is controlled with German Rexroth AC servo, wherein the feed amount is accurate, reliable and stepless adjustable, the deviation of feed amount is not more than 2%, the size of the rotation angle can be adjusted, the billet will be rotated and fed for two times in the same rolling process, and therefore the distribution of rolling force is even, the axial force is reduced significantly, the high-precision pipe with small deviation of the outer diameter and wall thickness can be obtained, and the yield is high.
8)Compared with side feeding, the rolling mill, which uses end feeding mode, omits the core bar removing device; moreover, the position of the core bar in the deformation zone is accurate, the rolling line is short, the mode is suitable for the rolling of long billet, and the working efficiency of the rolling mill is improved.
9)The feeding, discharging, perforating and other procedures are controlled with MLC program,, and therefore the degree of automation thereof is high.
10)The rolling pressure of the rolling machine is reduced by using a curve type core bar, and therefore the deformation of the billet metal is even and reasonable.
11)The main gear is provided with hardened tooth grinding process, by which the transmission is smooth, and the noise is low.
12)The main shaft and important gear are made of high- strength alloy steel.
13)The inner surface of the billet used is lubricated to improve the inner surface quality of the pipe, while prolonging the service life of the core bar.
14)The rolling machine uses annular ring type roller, curve type core bar, as well as the rolling mode of dual rotation and dual feed, and therefore the correction ability to the billet of which the wall thickness is uneven is relatively strong.
15)The equipment has a core bar fracture detection device, by which the equipment will be automatically stopped in case of the fracture of the core bar, and therefore the equipment can be protected well.
16)A number of patented technologies are applied to the equipment, such as floating type brake, and hydraulic locking nut of the rack. (The feed of the before dead center shall be determined according to the specific rolling condition)
2. Technical Specifications

Outer diameter of billet specificationΦ40-89mmRoller diameterΦ375mmWall thickness of billet specification3-14mmDiameter of the circle connected with roller gearΦ324/336/348mmLength of billet specification2000-8000mmFeed amount<12mm/timesOuter diameter of finished product specificationΦ25-60mmRotary feeding modeServo motorWall thickness of finished product specification2-10mmRotation angle57°Maximum length of finished product specification25000mmRotary feeding modeDual rotation and dual feedLength of rack stroke961.66mmLoading modeEnd partLength of effective deformation zone770mmPower of main motor200kwLength of diameter reducing and wall thickness reducing in deformation zone460mmMain controllerRexroth MLCTime of rack stroke120 times/minContinuous feedingyesMaximum extension coefficient<5Continuous rollingyes
3. Applications
1) Equipment working principle
Prefabricate the tool and die of the size required, and then install the tool and die within the equipment. In the working process of the equipment, the billets will be fed forward successively, in which the upper and lower roller will move in a reciprocating way, the outer diameter and wall thickness of the billet will be re-rolled to realize the size required by the customer through the physical change.
2) Equipment description
The equipment is mainly composed of a main power plant, a transmission device, a working frame, a base, a billet clamp, trolleys #1 and #2, lathe beds #1 and #2, rotary feeding boxes #1 and #2, a middle rack, core bar clamps #1 and #2, etc.
The power of the main power plant is mainly supplied through the motor. The transmission device includes a transmission structure for transmitting the power to the working frame. The working frame is moved in a reciprocating way to drive the rolling of the product. The base is the working platform of the working frame. The billet clamp is used for rotating the billet. The trolley is used for driving forwards the billet, and the lathe bed is the working platform of the trolley. The rotary feeding box is the core part of the equipment, and the servo motor is used for controlling the rotation and feed of the trolley.The continuous feeding and rolling device, which is composed of a middle rack, a trolley #1, a lathe bed #2, a rotary feeding box #2, and a core bar clamp #2, is an important part of continuous feeding and rolling system. The core bar clamp is mainly used for rotating the core bar.