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Address: No. 51, Gongye South Road, Jinan City, Shandong Province
Roll forming machine
A roll-forming machine is specialized equipment for manufacturing wheel rims. Typically, roll-forming involves three forming stages—Stage 1, Stage 2, and Stage 3—with each stage requiring a dedicated roll-forming machine. Each machine comprises the following components: the main frame, a hydraulic system, a PLC control system, an infeed/outfeed mechanism, and roll-forming dies.
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Product Information
Brief description
A roll-forming machine is specialized equipment for manufacturing wheel rims. Typically, roll-forming involves three forming stages—Stage 1, Stage 2, and Stage 3—with each stage requiring a dedicated roll-forming machine. Each machine comprises the following components: the main frame, a hydraulic system, a PLC control system, an infeed/outfeed mechanism, and roll-forming dies.
Device Specifications
|
Device model |
GX23/300-AH |
|
Roller-type force |
230KN |
|
Hydraulic station motor power |
82.5KW |
|
Spindle-mounted mold length |
320mm |
|
Spindle speed (adjustable) |
0 ~ 320 r/min |
|
Spindle material and diameter |
40CrMo, Φ145mm |
|
Distance between the upper and lower spindles |
240 mm ~ 380mm |
|
Axial adjustment range of the lower shaft |
±2mm |
|
Lower spindle stroke (at the mold‑mounting location, with a shaft diameter of 145 mm) |
140mm |
|
Lower spindle approach speed |
185mm/s |
|
Adjustable range of the lower spindle’s feed rate |
2~10mm/s |
|
Adjustable tilt angle of the lower spindle |
-0.34° to +0.17° |
|
Rated input voltage |
380V/3phase |
|
Rated input capacity |
110Kw |
Roll-type mold
Roll-forming machines must be equipped with roll-forming dies, with one set of dies provided for each process step.
Machine Tool Adjustment Features
Spindle Adjustment
Each spindle is supported by a rocker arm, which is hinged to the spindle. The hinge point of the rocker arm is equipped with a ball bearing; the rear end is mounted on an eccentric mechanism that enables the spindle to tilt. To ensure synchronous, symmetrical, and opposing adjustment of the two spindles, the two eccentric mechanisms are coupled via a mechanical linkage and adjusted using a handwheel. Their function is:
1) It provides the necessary shaping force during the molding process, enabling further control over product quality.
2) Compensation for spindle deformation
3) Compensate for die wear
Front and rear adjustment of the lower spindle
The horizontal front–rear adjustment mechanism for the lower main spindle has replaced the previous shim‑based adjustment method, making die adjustments much more convenient. Rotating the central spindle bolt (3) drives the sprocket (2), which in turn rotates the gear sleeve (4). The gear sleeve (5), via its threaded motion, advances or retracts the lower main spindle (2), enabling quick and uniform fore-and-aft adjustment of the forming roll on the lower main spindle. This new approach eliminates the need for shims, significantly improving die‑adjustment efficiency and reducing issues caused by improperly sized shims or their failure after prolonged use.
Spindle Speed Adjustment
The spindle is driven by a hydraulic motor, which is mounted at the rear of the forming machine and connected to the spindle via a universal joint. The upper and lower hydraulic motors independently drive the upper and lower spindles to rotate in opposite directions. By adjusting the throttle valves at the return ports of the hydraulic motors, the rotational speeds of the upper and lower spindles can be varied, ensuring that the linear velocities of the upper and lower roll dies remain synchronized when they contact the workpiece, thereby preventing scratches on both the workpiece and the roll dies.
Adjustment of the side guide
Side guides are used to maintain the axial position of the rim during the forming process and to ensure that the rim’s center aligns with the die’s center; the position of the guide wheels can be adjusted according to the workpiece conditions.
Side guides are mounted on both sides of the upper spindle; each side guide is equipped with a slide that moves in a straight line and is hydraulically driven.
The start and end points of the side guides are adjustable via handwheels, and each side guide is equipped with proximity switches at both its upper and lower ends as control elements.
Adjustment of the Workpiece Loading and Unloading Device
The height of the loading/unloading mechanism can be adjusted to an appropriate level based on the workpiece diameter, and this is accomplished by rotating the lifting lead screw.
Adjustment of the workpiece‑pushing position is achieved by positioning the roller‑type material rack forward or backward. Once the workpiece has been pushed into place, a locking mechanism at the lower portion of the rack secures its position, and a limit switch is activated to send a signal.
Disassemblable Roller Pusher Device
At the roots of both upper and lower main spindles (1) and (2), material‑pushing rings are installed. Dry grease is injected through grease fittings, and the pressure from the grease gun drives these rings forward, causing the forming rollers on the spindles to slide forward by a limited amount. This arrangement facilitates the smooth removal of the forming rollers, enabling quick assembly and disassembly and thereby enhancing operational efficiency.
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Address: No. 51, Gongye South Road, Jinan City, Shandong Province
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