Two-stand angularly hot rolling minor diameter seamless steel tube rolling technique and equipment thereof

A technology for seamless steel pipes and rolling equipment, applied in metal processing equipment, other manufacturing equipment/tools, metal rolling, etc., can solve the problems of inability to reduce wall and diameter, rough inner wall, reducing diameter and wall, etc.

CN100595027CInactive Publication Date: 2010-03-24LUOYANG DINGRUI MATERIAL TECH
8 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2010-03-24
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses the rolling technology of a double-stander oblique hot rolling small diameter seamless steel tube, and the rolling technology of the invention is that a mandrel trolley pushesa mandrel into a pierced billet and is pushed to move forward, the mandrel is heated to 950 DEG C to 1150 DEG C by an intermediate frequency induction heating electric furnace, the mandrel trolley continues to pushes the heating pierced billet into a rolling mill to carry out wall increasing and diameter reducing rolling, only the mandrel and a roller are cooled during rolling process; the piercedbillet that breaks away from the mandrel is placed into a reheating electric furnace for heating to 950 DEG C to 1150 DEG C and is sent into a stretch reducing and wall increasing rolling mill to carries out the diameter reducing rolling, the heating while rolling can be realized, and only the roller is cooled during the rolling process; the invention is finished by cooling, straightening, cutting and online detecting after rolling. The invention realizes the technology of heating the mandrel and the roller while rolling and cooling by improving the heating method of a heating furnace, structure and the cooling method of the mandrel and the roller. The rolling technology of a double-stander oblique hot rolling small diameter seamless steel tub improves efficiency, simplifies the technology, reduces cost, saves energy and reduces pollution, thus the rolled steel tube is high in precision.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The invention belongs to the technical field of steel pipe rolling equipment and rolling process, and mainly relates to a two-stand oblique hot-rolling small-diameter seamless steel pipe rolling process and equipment. Especially suitable for the production of high-precision small-diameter thick-walled seamless steel pipes. Background technique

[0002] Small-diameter seamless steel pipes are used in many fields such as production and life. At present, the production of small-diameter seamless steel pipes is mainly made by cold drawing (rolling). In the production process, there are many times of heading, cold drawing and pickling; and the production of small-diameter seamless steel pipes has many processes, high costs, and serious pollution. There is a lot of waste, and there are problems of slow efficiency, high energy consumption, low yield, serious pollution, and high environmental pressure. In addition to the deformation resistance of the steel materi...

Examples

Embodiment Construction

[0019] With reference to the drawings, the following examples of the present invention are given:

[0020] The production process of the embodiment of the present invention when rolling thick-walled and small-diameter seamless steel pipes is: conveying roller table → mandrel penetration → mandrel trolley pushes waste pipe → induction heating → diameter reduction and wall-increasing rolling with mandrel → Cooling bed → straightening machine → finished roller table → cutting machine → flaw detector → hydraulic testing machine → bundling. The mandrel trolley pushes the mandrel into the waste tube, and is heated to 950~1150℃ by the intermediate frequency induction heating electric furnace. The mandrel trolley continues to push the heated waste tube into the rolling mill for wall-increasing and diameter-reducing rolling. It is rolled while heating, and only the mandrel and roll are cooled during the rolling process. Since the distance from the heating furnace to the rolling place is ...