Technical Description

The lifting motion of the upper roller is driven by oil cylinders at both ends, and the bearings at both ends are supported by self-aligning roller bearings. The lifting synchronization of the upper roller is controlled by a computer. The tilting side of the upper roller is equipped with a tilting oil cylinder, and the tail of the upper roller is equipped with a balancing mechanism, which can facilitate the unloading of the rolled workpiece and cylinder.

The two lower rollers are supported by self-aligning roller bearings, fixed on the bearing seats of the two lower rollers, and driven by horizontal moving boxes at both ends. Its horizontal movement is automatically returned to the center by computer control. The machine is equipped with a material alignment device, which facilitates the alignment of sheet metal.

The lower roller is equipped with a set of supports, with a total of four support rollers fixed to the bearing seat of the support rollers.

The two lower rollers are active rollers, driven by dual main motors technology. The two motors reduce the speed through two sets of deceleration systems and drive the two lower rollers to rotate through universal joints. The rotary motion of both rollers is equipped with electro-hydraulic braking devices to ensure accurate positioning during workpiece rolling and pre bending.

For the convenience of rolling conical workpieces, the machine is located on the right framerequireEquipped with a cone rolling device. Composed of two blocking rollers and roller seats, it overcomes the axial force during the rolling of the cone tube. This device does not affect the rolling and discharging of straight cylindrical workpieces.

The working roller of this machinerequirementuse60CrMnMo high-quality alloy steel material, forged and quenched, with surface hardness

HB269-302， Good comprehensive mechanical performance, high strength, strong wear resistance, suitable for high load work, long service life,The three rollers of the plate rolling machine must be made of forgings, and the raw materials for forgings must be billets produced by electric furnace smelting, refining furnace refining, and vacuum degassing. The forgings shall refer to ChinaJB4726-2000Intermediate level four forgings require acceptance.

Overturning frameanswerEquipped with a tilting cylinder, it can tilt and stand up, making it convenient for workpiece retrieval. Tilting and resetting of the flipping framerequireEquipped with an interlocking device, the tipping frame can only tilt when the upper roller balance limit and balance pressure reach the set value; After the tipping frame is overturned, all other actions are in standby mode, and can only resume after the tipping frame is reset, providing safety protection.

The tail of the upper roller is equipped with a hydraulic balancing device. The balancing device plays a balancing role on the upper roller when the tipping frame tilts. When the tipping head flips and discharges the material, the upper roller is in a balanced state by the hydraulic balancing mechanism, which makes it easy to remove the cylindrical workpiece.

The machine body and frame are bothrequireAdopting a welded structure, the weld joint adopts full groove welding with good penetration, and undergoes overall annealing treatment to eliminate internal stress. The whole machine adopts a modular structure, with each component relatively independent and easy to maintain.

This functionrequireCapable of continuous hot bending, hot rolling, and hot rounding operations, with the maximum thickness during hot rolling300mm， Hot coil temperature range: coil round 850 ℃ -1050 ℃, should prevent overheating or overburning, the specific temperature depends on the carbon content; On the hot coil structure: 1. The upper and lower working rolls use self-aligning roller bearings; 2. Inside the left and right bearings of the upper rollerrequireInstall a heat shield, high-temperature resistant asbestos board outside the bearing seat and cylinder liner;3. High temperature lubricating grease is used for each moving part; 4. Appropriately increase the volume of the fuel tank and install an air cooling device.

3.2 Hydraulic Systemtechnical requirement

The main function of the hydraulic system is to drive the oil cylinder to make the upper roller move up and down; Control the tilting cylinder to perform lifting and lowering movements.

By using an electro-hydraulic directional valve, the lifting motion of the upper roller can be controlled; By using a hydraulic control one-way valve, the work roll can be kept in any position.

The circuits of the tilting cylinder and the feeding cylinder are equipped with one-way throttle valves, which can adjust the speed of each actuator appropriately.

a、 The hydraulic components are selected from well-known and high-quality domestic products to ensure the stability of the hydraulic system (hydraulic valve selection: Taiwan Yongzhen, etc.). hydraulic pumprequireAdopting ItalySha Ao "or" Mazuqi ".

b、 The system of this machine is designed with two independent oil circuits, each of which is driven by a motor to provide independent oil supply to the system through a high-pressure oil pump, making it easy to maintain and inspect.

Each oil circuit is controlled by two overflow valves to regulate pressure, with one of the oil circuits controlling the left main cylinder and the flip for the vertical movement of the upper roller

The overturning cylinder of the inverted frame (inverted head frame), the right main cylinder that controls the vertical movement of the upper roller through another oil circuit, and the balance cylinder that lifts and balances the upper roller. The maximum set pressure for each oil circuit is25MPa， The main function is to control the pressure of the main oil cylinder, and the other relief valve is set to a pressure of 16MPa, mainly to control the pressure of the overturning oil cylinder and the balancing oil cylinder.

The main oil cylinder in each oil circuit is composed of two sets of stacked and inserted components to adjust the movement speed of the main oil cylinder and meet the pressing speed of the upper roller under different working conditions.

In order to ensure the synchronization accuracy of the two main oil cylinders,requirementHigh precision displacement sensors are installed on the right frame and overturning frame. Through pressure sensors and a microcomputer control system, the main oil cylinder piston movement is detected and adjusted to meet the synchronization accuracy requirements of both ends of the upper roller.

Adopting unique pre pressure relief technology, it effectively avoids hydraulic shock and improves the service life of pipelines and seals.