Die for accurately controlling outer diameter of hot-rolled seamless steel pipe

By introducing a die rod and a motor-driven extrusion system into the hot-rolled seamless steel pipe outer diameter control die, the problem of inner diameter reduction caused by existing dies has been solved, achieving precise control of the outer diameter of the seamless steel pipe and improving diameter accuracy.

CN224195602UActive Publication Date: 2026-05-05SHANDONG XINSHENHAO INTELLIGENT EQUIP CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202520624889.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-03
Publication Date
2026-05-05
Estimated Expiration
2035-04-03

AI Technical Summary

Technical Problem

Existing hot-rolled seamless steel pipe outer diameter precision control molds only apply external pressure to sizing the seamless steel pipe after it has been opened and removed, resulting in a reduction in the inner diameter and affecting the diameter accuracy.

Method used

A mold comprising a worktable, a clamping plate, a mold rod, a hydraulic system, and a motor drive is designed. The mold rod is inserted into the steel pipe to prevent the inner diameter from shrinking, and the hydraulic cylinder and the motor-driven extrusion roller are used to uniformly extrude the outer diameter, thereby achieving precise control of the outer diameter.

Benefits of technology

This effectively prevents the inner diameter of seamless steel pipes from shrinking during the extrusion process, ensures precise machining of the outer diameter, and improves the diameter accuracy of seamless steel pipes.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The utility model discloses a die for accurately controlling the outer diameter of a hot-rolled seamless steel pipe, which relates to the technical field of seamless steel pipe processing and comprises a workbench, a clamp disc slidably mounted on the workbench, a die rod clamped and mounted on the clamp disc, a sliding frame slidably mounted in a through groove, and a rotating ring rotatably mounted in the sliding frame. A square frame is fixedly mounted in the rotating ring, mounting frames are movably mounted on the four edges of the interior of the square frame, extrusion rollers are rotationally mounted in the four mounting frames, hydraulic cylinders are fixedly mounted on the four edges of the exterior of the square frame, a gear ring is fixedly mounted on the outer ring of the rotating ring, and a third motor is fixedly mounted at the top end of the sliding frame; according to the seamless steel pipe extrusion die, the die rod with the corresponding size is inserted into a seamless steel pipe in a penetrating mode according to the inner diameter size of the seamless steel pipe before the seamless steel pipe is extruded, and the inner diameter of the seamless steel pipe can be prevented from being reduced during extrusion.
Need to check novelty before this filing date? Find Prior Art