PRT 80/W11S Steel Plate Rolling Machine Structure And Two Technical Features
CNC Steel Plate Rolling Machine can roll bending circular and arc-shaped workpieces and has a high-precision plate end pre-bending function.
PRT-80 CNC Steel Plate Rolling Machine
PRT-80 CNC Steel Plate Rolling Machine is mainly used for bending and forming metal materials. It can roll circular and arc-shaped workpieces and has a high-precision plate end pre-bending function. It is widely used in the wind power tower manufacturing industry.
This article is to research and analyze the main structure of the PRT-80 CNC plate rolling machine and its technical characteristics.
Read More: Plate Rolling Machine, Sheet Metal, Steel Plate Bending Roll
The Main Technical Parameters of PRT-80 CNC Steel Plate Rolling Machine
| Brand | BIT | |
| Specification model number | Unit | W11STNC-80*3200 |
| Type | CNC | |
| Maximum width | mm | 3200 |
| The center of the maximum plate thickness | mm | T80×B3200× φmin3000 ( σs≤245MPa) T68×B3200× φmin3000 ( σs≤345Mpa) |
| Upper roll diameter | mm | φ770 |
| Bottom roll diameter | mm | φ440 |
| Center distance between two lower rollers | mm | 820 |
| Roller diameter | mm | φ440 |
| Number of rollers | 4 | |
| main motor power | kW | 90 |
| Machine Dimensions | mm | 7100*5835*4300 |
The Main Structure of PRT-80 CNC Steel Plate Rolling Machine
drive device, 4 – main drive device, 5 – idler device, 6 – tipping device, 7, 8 – left
and right rack, 9 – chassis, 10 – balancing devices.
Read More: Bending Machine Wikipedia
Upper roller device
The upper roller device is composed of the main oil cylinder, upper roller bearing housing, upper roller, double-row self-aligning bearing, etc. The two main oil cylinders provide the pressure required for rolling the plate, and the working pressure of the main oil cylinder is 19.5 Mpa. The double-row self-aligning bearing adopts low-speed, heavy-duty self-aligning roller bearings, and the upper roller is in the shape of a drum(We called it Crown the roller, Why Crown Your Plate Roll?). The load factor of the maximum pressing force of the upper roller is 0.7 in the design, and the uniform load is preset to compensate for the deformation and deflection of the upper roller.
Lower roller and horizontal moving device
The lower roll device is composed of the lower roll, the lower roll bearing housing, the lower roll input gear, etc. The horizontal movement device is powered by the horizontal movement motor, and the horizontal movement of the upper roll device is driven by the worm gearbox, worm gear, and screw nut mechanism. Realize the asymmetric rolling of the sheet. The main drive of the lower roll provides power, through the output gear of the main drive, the input gear of the lower roll, and the open transmission torque to the lower roll.
Guide Roller device
The idler device is composed of an idler, a worm gear mechanism, a wedge mechanism, etc. There are four idlers in a group, and it can be adjusted up and down according to the load size of the rolled plate specification. When rolling a thick plate, in order not to make the lower The rollers are bent to prevent the product from being rolled into a “pouch” shape, and the supporting roller needs to be raised; when rolling a thin plate, the bending amount that matches the drum shape of the upper roller is generated on the lower roller to prevent the product from being rolled into a “waist” shape. The roller needs to be lowered.
Main drive
The main transmission device is composed of a main motor, V-belt, cylindrical gear reducer, electro-hydraulic push rod brake, etc. The output gear drives the two lower roller gears. The main transmission can be forward and reverse to provide rolling torque for sheet rolling.
Tip over unloading device
The overturning and unloading device is composed of a ram, an overturning oil cylinder, etc. The overturning of the overturning device facilitates the removal of the product along the axial direction of the roller.
Fixing and overturning the discharge side frame and chassis
The fixed and overturned side frame is used to place the two main oil cylinders. The chassis is an integral frame structure with good rigidity. It does not need the foundation to bear the load of the coiled plate, as long as it bears the weight of the equipment. It is especially suitable for mobile operations.
Two Technical Features of the PRT-80 Steel Plate Rolling Machine
Technical Feature 1: With crown upper roller and adjustable idler roller
The drum-shaped upper roll (roller crowning) is adopted, and the crowning amount of the upper roll is generally preset at 70% of the uniform load of the roll; the lower roll with a smaller diameter is supported by an up and down adjustable idler roller. According to the load of the rolled product, adjust the idler at the lower part of the lower roller, which greatly improves the straightness of the product. When rolling thin sheets, the idler at the lower part of the lower roller can be adjusted downward; there will be no “waist-like” appearance, and the product will be straight high degree.
High-precision plate end pre-bending function
The PRT plate rolling machine adopts rear bending (the feeding direction of the plate is opposite to the moving direction of the upper roller), the upper roller is pressed down while the lower roller is rotating, continuous bending, the end of the plate is pre-bent directly pressurized and pre-bent, avoiding The generation of the front curved back angle, and the length and shape of the remaining straight side can be controlled.