Integrated forging tool of high-strength steel spherical end socket for pressure-resistant equipment

Abstract

The utility model provides an integrated forging tool of a high-strength steel spherical end socket for pressure-resistant equipment. An upper die comprises an acting part, and the shape of the acting surface of the acting part is matched with the shape of the inner side surface of the end socket; the lower die comprises a positioning part and an annular piece; the positioning part comprises a part E and a part F; a cylindrical through hole A is formed in the center of the part E, a trumpet-shaped through hole B is formed in the part F, and the bottom end of the through hole B is connected with the top end of the through hole A; the annular piece is located in the through hole A, and the top surface of the annular piece is an arc surface; when the annular piece is arranged in the through hole A, the top surface of the annular piece and the top surface of the F part form a continuous arc surface, and the shape of the continuous arc surface is matched with that of the outer side surface of the sealing head. By means of the tool, thermal-state integrated forming of the spherical end socket can be achieved, the spherical end socket which is uniform in strength, meets the technical standard and is accurate in size precision and weight control can be produced in cooperation with subsequent performance heat treatment and finish machining procedures, and the technical problems that after cold-state stamping, the strength of a steel plate is reduced, and the size precision is poor are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to special material advanced manufacturing technology field, concretely relates to a kind of integrated forging frock of high-strength steel spherical head for pressure equipment. BACKGROUND

[0002] Chromium-nickel-molybdenum-vanadium high-strength steel is the highest strength level underwater pressure equipment special steel currently used in China, with high strength, high toughness, good weldability, excellent seawater corrosion resistance and other characteristics, with good shipbuilding process adaptability, and is widely used in the manufacture of underwater pressure equipment. At present, the material supply form of such high-strength steel in China is single, only quenched and tempered hot-rolled steel plate. In the local structure position of underwater pressure equipment, chromium-nickel-molybdenum-vanadium high-strength steel spherical head design is required, and the structure of the head is shown in Figure 1 .

[0003] As Figure 1 The head of the type is a high-strength steel spherical head structure for underwater pressure equipment, with large spherical radius and opening diameter. Currently, quenched and tempered hot-rolled steel plates are used for manufacturing. After processes such as steel plate blanking, beveling, steel plate cold stamping, and finishing, there are problems such as strength reduction after cold stamping of the steel plate, large internal residual stress of the finished product, and poor dimensional accuracy of the finished product. In terms of product performance and weight control, it has a certain impact on the construction of underwater pressure equipment, and in the process of cold stamping of the steel plate, uneven thickness of the steel plate may occur, and in severe cases, delamination and cracking may occur. SUMMARY

[0004] Therefore, the utility model provides a kind of integrated forging frock of high-strength steel spherical head for pressure equipment, using the frock, can realize the hot-state integrated forming of spherical head, cooperate subsequent performance heat treatment and finishing process, can produce the spherical head that strength is uniform and meets technical standard, dimensional accuracy and weight control accuracy, solve the technical problems of strength reduction and poor dimensional accuracy of the steel plate after cold stamping.

[0005] On the basis of the prior art, the utility model provides a kind of integrated forging frock of high-strength steel spherical head for pressure equipment, including the upper die and lower die used in conjunction;

[0006] The upper die includes an action part, and the action surface shape of the action part matches the inner surface shape of the head;

[0007] The lower die includes a positioning part and a ring,

[0008] The positioning part includes an E part and an F part, and the E part is located below the F part;

[0009] The center position of the E part is provided with a cylindrical through hole A, the F part is provided with a horn-shaped through hole B, the through hole B is coaxially arranged with the through hole A, and the bottom end of the through hole B is connected with the top end of the through hole A.

[0010] The annular part is located in the through hole A, and the top surface of the annular part is an arc surface.

[0011] When the annular part is placed in the through hole A, the top surface of the annular part and the top surface of the F part form a continuous arc surface, and the shape of the continuous arc surface matches the shape of the outer side surface of the head.

[0012] When the head is forged into a shape, the head can be pushed upward to separate from the lower die through the central hole of the annular part, thereby improving the flexibility of the forging tool.

[0013] Preferably, the upper die further comprises a hoisting part, and the hoisting part is provided with a hoisting hole A, which is used for hoisting the upper die to a suitable position for forging preparation.

[0014] Preferably, the hoisting part comprises a rectangular strip A, a rectangular strip B and a rectangular strip C which are sequentially stacked, and the rectangular strip C is connected with the acting part; the hoisting hole A is located on the rectangular strip B; the hoisting hole A arranged on the rectangular strip B facilitates the connection of the upper die with the forging press; compared with the whole circle design of the prior art, the arrangement of the hoisting part in the form of the stacked connection of the rectangular strip A, the rectangular strip B and the rectangular strip C effectively simplifies the structure of the upper die and reduces the manufacturing cost; in use, the head is formed by rotating the angle of the forging blank and pressing multiple times.

[0015] Preferably, the annular part is provided with a hoisting hole B, and the annular part is hoisted into the through hole A by using the hoisting hole B.

[0016] Preferably, the E part is provided with a hoisting hole C, and the positioning part can be hoisted to a specified position by using the hoisting hole C, thereby improving the flexibility of the forging tool.

[0017] Compared with the prior art, the upper die and the lower die are arranged, the head can be integrally formed, and the success rate of forging is improved; the F part and the annular part are arranged, a continuous arc surface can be formed, and the shape of the continuous arc surface matches the external shape of the head, so that the head with the required size and precision can be directly obtained when the forging tool is used; the through hole A and the annular part are arranged, the head after forming can be quickly demolded, and the flexibility of the equipment is improved. By using the forging tool, the hot-state integrally formed head can be realized, and the head with uniform strength, which meets the technical standards, size precision and weight control precision, can be produced by cooperating with the performance heat treatment and finishing process, thereby solving the technical problems of the decrease of the strength of the steel plate after cold-state stamping and the poor size precision. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to make the technical scheme in the utility model or the prior art clearer, the accompanying drawings needed in the embodiment or the prior art description will be briefly introduced as follows, and obviously, other drawings can be obtained by those skilled in the art without creative labor on the premise of the drawings.

[0019] Figure 1 It is a structural schematic view of the spherical head.

[0020] Figure 2 It is a structural schematic view of the forging tool.

[0021] Figure 3 It is a structural schematic view of the positioning part.

[0022] Figure 4 It is a structural schematic view of the ring part.

[0023] Figure 5 It is a structural schematic view of the forging blank.

[0024] Figure 6 It is a structural schematic view of the forging tool when the forging tool is not working.

[0025] Figure 7 It is a schematic view when the forging tool is working.

[0026] In the figure, 1 is an upper die, 101 is an acting part, 102 is a hoisting part, 1021 is a rectangular strip A, 1022 is a rectangular strip B, 1023 is a rectangular strip C, 2 is a lower die, 201 is a positioning part, 2011 is an E part, 2012 is an F part, 202 is a ring part, 3 is a hoisting hole A, 4 is a through hole A, 5 is a through hole B, 6 is a hoisting hole C, 7 is a hoisting hole B, and 8 is a forging blank. DETAILED DESCRIPTION

[0027] In order to make the technical scheme in the utility model or the prior art clearer, the accompanying drawings needed in the embodiment or the prior art description will be briefly introduced as follows, and obviously, other drawings can be obtained by those skilled in the art without creative labor on the premise of the drawings.

[0028] Embodiment 1

[0029] In combination with Figures 2-4 The utility model provides a kind of integrated forging tool of high-strength steel spherical head for pressure equipment, including the upper die 1 and lower die 2 of matched use;

[0030] The upper die 1 comprises an acting part 101, and a shape of an acting surface of the acting part 101 matches a shape of an inner side surface of the head;

[0031] The upper die 1 further comprises a hoisting part 102, and a hoisting hole A3 is arranged on the hoisting part 102, so as to hoist the upper die 1 to a suitable position for preparation of forging;

[0032] The hoisting part 102 comprises a rectangular strip A1021, a rectangular strip B1022 and a rectangular strip C1023 which are sequentially stacked, and the rectangular strip C1023 is connected with the acting part 101;

[0033] The hoisting hole A3 is arranged on the rectangular strip B1022, and the arrangement of the hoisting hole A3 on the rectangular strip B1022 facilitates connection of the upper die 1 with a forging press;

[0034] The hoisting part 102 is arranged in a stacked manner by the rectangular strip A1021, the rectangular strip B1022 and the rectangular strip C1023, and compared with a whole circle design in the prior art, the structure of the upper die 1 is effectively simplified, and the manufacturing cost is reduced; in use, the head is formed by rotating the forging blank 8 by an angle and pressing the upper die 1 multiple times;

[0035] The lower die 2 comprises a positioning part 201 and a ring-shaped part 202;

[0036] The positioning part 201 comprises an E part 2011 and an F part 2012, and the E part 2011 is located below the F part 2012;

[0037] A cylindrical through hole A4 is arranged at a central position of the E part 2011, a trumpet-shaped through hole B5 is arranged on the F part 2012, the through hole B5 is coaxially arranged with the through hole A4, and a bottom end of the through hole B5 is connected with a top end of the through hole A4;

[0038] A hoisting hole C6 is arranged on the E part 2011, and the hoisting hole C6 is used to hoist the positioning part 201 to a specified position, thereby improving flexibility of use of a forging tool;

[0039] The ring-shaped part 202 is located in the through hole A4, and a top surface of the ring-shaped part 202 is an arc surface;

[0040] A hoisting hole B7 is arranged on the ring-shaped part 202, and the hoisting hole B7 is used to hoist the ring-shaped part 202 into the through hole A4;

[0041] When the ring-shaped part 202 is placed in the through hole A4, the top surface of the ring-shaped part 202 and the top surface of the F part 2012 form a continuous arc surface, and a shape of the continuous arc surface matches a shape of an outer side surface of the head;

[0042] When the head is forged into shape, the head can be pushed upward through the center hole of the annular piece 202 to separate from the lower die 2, improving the flexibility of the use of the forging tool; or the annular piece 202 can be disassembled to separate the annular piece 202 from the through hole A4 to push the head to separate from the lower die 2.

[0043] Embodiment 2

[0044] In combination Figures 2-7 , the use method of the above forging tool is as follows:

[0045] (1) Forging blank

[0046] The spherical head raw material is an electroslag ingot, and a pie-shaped forging blank is forged into shape by a forging press, as shown in Figure 5 ;

[0047] (2) Die preparation

[0048] The upper die 1 is connected with the upper top plate of the forging press, so that it can reciprocate up and down with the upper top plate of the forging press, and is used for forging stamping;

[0049] The annular piece 202 is placed in the through hole A4, and the lower die 2 is assembled; after the lower die 2 is assembled, it is placed on the rotating platform directly below the forging press, and the rotating platform can drive the lower die 2 to rotate;

[0050] The forging blank 8 obtained in step (1) is placed on the lower die 2, the position of the lower die 2 is adjusted so that the upper die 1 is above the forging blank 8, and the center lines of the three are coincident, as shown in Figure 6 ;

[0051] (3) The upper die 1 moves downward in the vertical direction under the action of the forging press until the forging blank 8 is attached to the lower die 2; the upper die 1 is lifted, the rotating platform on which the lower die 2 is located is rotated by 45~90°, the upper die 1 is pressed again to attach the forging blank to the lower die 2, and the above operation is repeated until each angle of the forging blank 8 is attached to the lower die 2, and the spherical head is forged and stamped; see Figure 7 ;

[0052] (4) The stamped spherical head is demolded, and then post-processing is performed by using the existing technology to obtain a finished head with high performance and size precision.

[0053] As can be seen from the above manufacturing method, the use of the forging tool of the present application can realize the integrated manufacturing of the chromium-nickel-molybdenum-vanadium system high-strength steel spherical head.

[0054] The utility model has been described in detail above. The "upper", "lower", "left" and "right" in the embodiment are relative to the position description in the drawings. Although the utility model has been described in detail by referring to the drawings and combining the preferred embodiment, the utility model is not limited to this. Without departing from the spirit and essence of the utility model, those skilled in the art can make various equivalent modifications or replacements to the embodiment of the utility model, and these modifications or replacements should be within the scope of the utility model. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. An integrated forging tool for a high-strength steel spherical head of a pressure containment equipment, characterized by, The upper die and the lower die are used together. The upper die comprises an acting part, and the shape of the acting surface of the acting part matches the shape of the inner side surface of the head. The lower die comprises a positioning part and a ring-shaped part. The positioning part comprises an E part and an F part, and the E part is below the F part. A cylindrical through hole A is arranged at the center of the E part, a horn-shaped through hole B is arranged on the F part, and the through hole B is coaxially arranged with the through hole A. The bottom end of the through hole B is connected with the top end of the through hole A. The ring-shaped part is arranged in the through hole A, and the top surface of the ring-shaped part is an arc surface.

2. The integrated forging tool for a high-strength steel spherical head of pressure equipment according to claim 1, wherein When the ring-shaped part is arranged in the through hole A, the top surface of the ring-shaped part and the top surface of the F part form a continuous arc surface, and the shape of the continuous arc surface matches the shape of the outer side surface of the head.

3. The integrated forging tool for a high-strength steel spherical head of pressure equipment according to claim 2, wherein The upper die further comprises a hoisting part, and a hoisting hole A is arranged on the hoisting part.

4. The integrated forging tool for a high-strength steel spherical head of pressure equipment according to claim 1, wherein The hoisting part comprises a rectangular strip A, a rectangular strip B and a rectangular strip C which are sequentially stacked, and the rectangular strip C is connected with the acting part.

5. The integrated forging tool for a high-strength steel spherical head of pressure equipment according to claim 1, wherein The hoisting hole A is arranged on the rectangular strip B. A hoisting hole B is arranged on the ring-shaped part. A hoisting hole C is arranged on the E part.

Images