What are the advantages of a large thread-rolling machine?

Release Date:

2022-12-13 16:14

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Large thread-rolling machine It is a multifunctional cold-rolling forming machine that, within its rolling pressure range, can perform thread rolling, straight‑thread rolling, and helical‑thread rolling on workpieces in the cold state; it also supports rolling of spur gears, helical gears, and spiral spline gears, as well as straightening, diameter reduction, rolling, and various other forming and rolling operations. It features reliable electrical systems. — The hydraulic actuation and control system allows each working cycle to be selected from three modes: manual, semi-automatic, and automatic. Wire rolling is an advanced non‑cutting process that effectively enhances both the internal and surface quality of workpieces. During the machining process, the radial compressive stresses generated by large‑diameter thread‑rolling machines can significantly improve the fatigue strength and torsional strength of the workpiece, making it an ideal, energy‑efficient, low‑consumption process.

Large thread-rolling machine Advantages ：

It ensures dimensional stability and high precision. For mass‑produced locknuts and precision screws, a fixed‑type rolling machine is available; when the required dimensions are fixed, it can be equipped with a vibratory bowl feeder to achieve automation. The rolling type is suitable for processing long workpieces. The three‑axis large thread‑rolling machine is specifically designed for threading hollow tubes and is tailored for pipe fittings. This large thread‑rolling machine features an equilateral triangular support structure that guarantees excellent roundness, high precision, concentricity, and perpendicularity of the workpiece. It serves the fastener industry. Common The choice.

Adjustment of the two‑axis large thread‑rolling machine: The two rollers must be synchronized, and each requires a corresponding centering mandrel tailored to its specific outer diameter. During threading, the workpiece is placed on the centering plate, with its center height aligned with that of the rolling die.

Three-axis large thread-rolling machine commissioning: Use the rolling die to adjust an isosceles triangle, set the clearance according to the pipe diameter, and adjust the lead. When installing the rolling die, ensure that one end of the die protrudes outward, and proceed as follows… Install A, B, C, B, and C in a clockwise sequence. Insert a round tube between the wheels, rotate it half a turn, remove the tube, and check whether the pressure line forms a continuous loop. If there is any gap, inspect and adjust two of the wheels while leaving the third unadjusted. Remember not to test the pressure all at once, as this could damage the components.

Large thread-rolling machine Processing Principle ：

Principle of cold roll forming for small-module involute splines. L and R are a pair of involute rolling wheels with identical parameters, mounted on the two main spindles of the rolling machine. Driven by the transmission mechanism, they rotate synchronously in the same direction. The R wheel can be driven by a hydraulic cylinder to perform radial feed motion, while the L wheel is adjusted by a regulating mechanism so that its imprint coincides with that of the R wheel on the surface of workpiece P. Workpiece P is positioned and clamped by two center holes.

Adjustment of large thread-rolling machine of The fixture allows the workpiece to move axially and, under load, can be positioned on the fixture. The oscillation angle of point O about an axis parallel to the machine tool’s spindle ensures that the workpiece remains in a state of free rolling between the two rollers throughout the cold‑rolling process, while also facilitating workpiece clamping. The structural dimensions, geometric tolerances, and technical requirements of the roller are specified in accordance with those for thread‑rolling rollers and cylindrical measuring gears. The normal‑line length or center distance m of the roller is calculated based on the spline data of the large‑diameter thread‑rolling machine.

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