CN105312848A - Forging method for double-arm hanging ring - Google Patents

Abstract

The invention discloses a forming method for a double-arm hanging ring. The method includes the process steps of firstly, selecting a high-strength and high-tenacity alloy structure steel blank for raw materials, and forging the steel blank into a flat cuboid blank through forging hammer free forging, wherein the forging temperature ranges from 850 DEG C to 1150 DEG C; secondly, drawing lines on the flat cuboid blank according to the outline contour of the double-arm hanging ring, forming the shape of the double-arm hanging ring through gas cutting, and conducting rounding on the outer contour edge and the lower contour edge which are subjected to gas cutting; thirdly, heating hanging lug parts at the two ends of the double-arm hanging ring formed through gas cutting, and conducting forging forming in a mold to remove flanges, wherein the forging temperature ranges from 850 DEG C to 1150 DEG C; fourthly, heating two pull rods in the middle of the double-arm hanging ring formed through gas cutting, throwing the mold through a conventional forging model, and conducting forging draw-out forming on the two rods at the same time, wherein the forging temperature ranges from 850 DEG C to 1150 DEG C. The forming method is free of any weld joints, the safety performance is higher while the requirements for the bearing capacity, impact resistance and the small weight are met, and the product percent of pass is greatly increased.

Description

A kind of forging method of double-arm lifting-ring

Technical field

The present invention relates to a kind of forging method of double-arm lifting-ring.

Background technology

Petroleum hanger ring be oil drilling and workover rig operation time play lower tubular column and hang the Special wellhead instrument of elevator, require that bearing capacity is strong, shock-resistant, lightweight, security reliability is high.During use, the upper ear-hang of suspension ring is on the both sides auxiliary hook of hook, and the lower ear-hang of suspension ring is on the hanger of elevator.Suspension ring divide single-arm hoisting ring and double-arm lifting-ring, and single-arm hoisting ring is specially adapted to deep-well and ultradeep well operation, and double-arm lifting-ring is applicable to shallow well operation.At present, the double-arm lifting-ring that home and abroad produces is all adopt forging and weld the processing method combined, beat the key steps such as groove welding complete by stock draw out, bending, interface, this method produces double-arm lifting-ring, interface welding sequence requires very strict, lost efficacy and the underproof main cause of the examination and test of products during the existence of weld seam uses often, thus caused the potential safety hazard brought due to self structure and the low problem of product percent of pass.

Summary of the invention

For solving above-mentioned existing shortcoming, main purpose of the present invention is the forging method of the double-arm lifting-ring providing a kind of practicality, and without any weld seam, hold cultivation ability satisfied, shock-resistant, while lightweight requirement, security performance is higher, and product percent of pass is improved greatly.

For reaching above-described object, the forging method of a kind of double-arm lifting-ring of the present invention takes following technical scheme:

A forging method for double-arm lifting-ring, comprises following process steps:

A the structural alloy steel steel billet of () raw material selection high strength, high tenacity, adopts forging hammer open die forging steel billet to be forged into flat cuboid blank, forging range 1150 ~ 850 DEG C;

B () presses the profile outline line of double-arm lifting-ring on flat cuboid blank, gas cutting goes out the shape of double-arm lifting-ring, to the upper and lower silhouette edge rounding after gas cutting;

C hanger position, double-arm lifting-ring two ends that gas cutting becomes by () is heated respectively, and forging and molding in a mold, cuts overlap, forging range 1150 ~ 850 DEG C;

Pull bar position, centre two heating of the double-arm lifting-ring d) become by gas cutting, utilizes conventional forging die type to fall mould, carries out draw out shaping to two bar portions simultaneously, forging range 1150 ~ 850 DEG C.

Adopt the present invention of as above technical scheme, there is following beneficial effect:

The petroleum double-arm lifting-ring produced in this way, without any weld seam, holds cultivation ability satisfied, shock-resistant, while lightweight requirement, security performance is higher, and fundamentally solve the security hidden trouble that prior art is brought due to the existence of weld seam, product percent of pass improves greatly.

Accompanying drawing explanation

Fig. 1, Fig. 2 are the two mouth suspension ring schematic diagrames of oil

Fig. 3, Fig. 4 are the flat cuboid blank schematic diagrames be forged into

Fig. 5 A, Fig. 5 B, Fig. 5 C, Fig. 5 D are the left side hanger die drawings of double-arm lifting-ring

Wherein:

Centrally line sectional view when Fig. 5 B is upper and lower mould matched moulds,

Fig. 5 A is patrix (1) internal structure schematic diagram,

Fig. 5 C is counterdie (2) internal structure schematic diagram,

Fig. 5 D is Fig. 5 B right view.

Detailed description of the invention

In order to further illustrate the present invention, below in conjunction with accompanying drawing, be forged to example with SH75 petroleum double-arm lifting-ring, the invention will be further described:

1, blanking, forging: the structural alloy steel 35CrMo selecting high strength, high tenacity, with GZ4040 band sawing machine blanking Φ 200 ㎜ × 225 ㎜, use 3T flat-die hammer, flame heating furnace heats, forging range: 1150 ~ 850 DEG C, freely becomes the 60 flat cuboid blanks in ㎜ ± 15, ㎜ ± 5 × 1650, ㎜ ± 280 as shown in Figure 3, Figure 4;

2, line, gas cutting, polishing: as shown in Figure 3, Figure 4, flat cuboid blank is pressed the appearance profile line of double-arm lifting-ring, and see in figure shown in double dot dash line, gas cutting goes out the shape of double-arm lifting-ring, is polished into rounding to the silhouette edge after gas cutting;

3, forge, repair: the hanger position, double-arm lifting-ring two ends that gas cutting becomes is heated respectively, to hanger forging and molding on the left of double-arm lifting-ring in the mould shown in Fig. 5 A, Fig. 5 B, Fig. 5 C, Fig. 5 D, same by right side hanger forging and molding, right side hanger forging mould therefor is identical with left side hanger mould therefor structure, only size difference.Cut overlap, polish round and smooth, forging range 1150 ~ 850 DEG C.

4, forge: bar position, centre two heating of the double-arm lifting-ring become by gas cutting, utilizes conventional forging die type to fall mould, carry out draw out shaping to two bar positions simultaneously, forging range 1150 ~ 850 DEG C.

5, integral surface polishing round and smooth after make double-arm lifting-ring as shown in Figure 1 and Figure 2.

Claims (1)

1. a forging method for double-arm lifting-ring, comprises following process steps:

A the structural alloy steel steel billet of () raw material selection high strength, high tenacity, adopts forging hammer open die forging steel billet to be forged into flat cuboid blank, forging range 1150 ~ 850 DEG C;

B () presses the profile outline line of double-arm lifting-ring on flat cuboid blank, gas cutting goes out the shape of double-arm lifting-ring, to the upper and lower silhouette edge rounding after gas cutting;

C hanger position, double-arm lifting-ring two ends that gas cutting becomes by () is heated respectively, and forging and molding in a mold, cuts overlap, forging range 1150 ~ 850 DEG C;

Pull bar position, centre two heating of d double-arm lifting-ring that gas cutting becomes by (), utilizes conventional forging die type to fall mould, carries out draw out shaping to two bar portions simultaneously, forging range 1150 ~ 850 DEG C.