CN214442738U

CN214442738U - Near-net forming die for pump shell forging of nuclear power main pump

Info

Publication number: CN214442738U
Application number: CN202120424482.9U
Authority: CN
Inventors: 白润达
Original assignee: Liaoning Beixiang Heavy Machinery Manufacturing Co ltd
Current assignee: Liaoning Beixiang Heavy Machinery Manufacturing Co ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-10-22
Anticipated expiration: 2031-02-26

Abstract

The utility model provides a nearly net forming die of nuclear power main pump case forging belongs to metal forging processing technology field, concretely relates to nearly net forming die of nuclear power main pump case forging. The utility model provides a nearly net forming die of nuclear power main pump case forging. The utility model discloses a nearly net forming die of nuclear power main pump case forging, including last mould, lower mould, horizontal left mould and horizontal right mould, its characterized in that: a nozzle core mould is arranged in the center of the upper mould, and a nozzle forming gap is arranged between the nozzle core mould and the upper mould; the lower die is a groove-shaped body which is modeled with the lower part of the workpiece; the horizontal right die comprises a workpiece right end face forming body, a central rod is arranged on the workpiece right end face forming body, a conical closing-up forming head is arranged at the end part of the central rod, and a guide rod is arranged at the end part of the closing-up forming head.

Description

Near-net forming die for pump shell forging of nuclear power main pump

Technical Field

The utility model belongs to the technical field of the metal forging processing, concretely relates to nearly net forming die of nuclear power main pump case forging.

Background

With the increasing emphasis on nuclear power safety, the safety requirements of nuclear power equipment are gradually improved, and many nuclear primary parts are changed into forgings from castings. The pump casing of the main pump of the nuclear primary equipment is changed into a forged piece from an original casting, and the pump casing is researched and developed in a large-scale heavy machinery factory in China at present.

The pump shell has a complex shape and a large size and weight, so that only one cylinder can be forged in forging and then cut, the good outer layer tissue is cut off, the fiber tissue is damaged, and in addition, the cutting allowance is large in production and manufacturing, the production efficiency is extremely low, and the material utilization rate is extremely low.

Disclosure of Invention

The utility model discloses to above-mentioned problem, provide a nearly net shaping mould of nuclear power main pump case forging.

For realizing the above purpose of the utility model, the utility model discloses a following technical scheme, the utility model discloses a nearly net forming die of nuclear electricity main pump case forging, including last mould, lower mould, horizontal left mould and horizontal right mould, its characterized in that: a nozzle core mould is arranged in the center of the upper mould, and a nozzle forming gap is arranged between the nozzle core mould and the upper mould; the lower die is a groove-shaped body which is modeled with the lower part of the workpiece; the horizontal right die comprises a workpiece right end face forming body, a central rod is arranged on the workpiece right end face forming body, a conical closing-up forming head is arranged at the end part of the central rod, and a guide rod is arranged at the end part of the closing-up forming head; the horizontal left die comprises a workpiece left end face forming body, a closing-up sleeve corresponding to the closing-up forming head is arranged in the workpiece left end face forming body, and a guide groove matched with the guide rod is further arranged in the horizontal left die.

As an optimal scheme of the utility model, go up the mould and be provided with strengthening rib shaping groove with the lower mould internal surface.

As a second preferred embodiment of the present invention, a mold locking mechanism is provided between the upper mold and the lower mold.

As a third preferred embodiment of the present invention, the nozzle core mold is fixed to the upper mold through a core mold flange.

The utility model has the advantages that: the utility model discloses but one shot forming in the mould after the forging of cylindric blank, the surplus is controllable, and two mouthpiece shaping are reasonable, and the fibre state can prolong the mouthpiece shape and distribute.

Meanwhile, the tube seat part forms a complete tissue fiber state, so that the product performance can be greatly improved, and the running safety of the nuclear primary main pump is ensured. In addition, the machining efficiency is greatly improved due to the reduction of the allowance.

Drawings

Fig. 1 is a schematic structural view before stamping of the present invention.

Fig. 2 is a side sectional view of fig. 1.

Fig. 3 is a schematic structural diagram of the utility model after punching.

Fig. 4 is a side sectional view of fig. 3.

FIG. 5 is a schematic structural diagram of a pump casing of a nuclear power main pump.

Fig. 6 is a top view of fig. 5.

Fig. 7 is a left side view of fig. 5.

In the drawing, 1 is a horizontal left die, 2 is a guide groove, 3 is a closing sleeve, 4 is a workpiece left end face forming body, 5 is a blank, 6 is a nozzle core die, 7 is a core die flange, 8 is a nozzle forming gap, 9 is an upper die, 10 is a workpiece right end face forming body, 11 is a horizontal right die, 12 is a reinforcing rib forming groove, 13 is a lower die, 14 is a center rod, 15 is a closing forming head, 16 is a guide rod, 18 is a die locking mechanism, 19 is a closing part of a workpiece, 20 is a nozzle part of the workpiece, and 21 is a reinforcing rib part of the workpiece.

Detailed Description

The utility model discloses a nearly net forming die of nuclear power main pump case forging, including last mould 9, lower mould 13, horizontal left side mould 1 and horizontal right side mould 11, its characterized in that: a nozzle core mould 6 is arranged at the center of the upper mould 9, and a nozzle forming gap 8 is arranged between the nozzle core mould 6 and the upper mould 9; the lower die 13 is a groove-shaped body which is modeled with the lower part of the workpiece; the horizontal right die 11 comprises a workpiece right end face forming body 10, a central rod 14 is arranged on the workpiece right end face forming body 10, a conical closing-up forming head 15 is arranged at the end of the central rod 14, and a guide rod 16 is arranged at the end of the closing-up forming head 15; the horizontal left die 1 comprises a workpiece left end face forming body 4, a closing-up sleeve 3 corresponding to a closing-up forming head 15 is arranged in the workpiece left end face forming body 4, and a guide groove 2 matched with a guide rod 16 is further arranged in the horizontal left die 1.

As a preferred scheme of the utility model, go up mould 9 and lower mould 13 internal surface and be provided with strengthening rib shaping groove 12.

As a second preferred embodiment of the present invention, a mold locking mechanism 18 is provided between the upper mold 9 and the lower mold 13.

As a third preferred embodiment of the present invention, the nozzle core mold 6 is fixed to the upper mold 9 through a core mold flange 7.

The utility model discloses a nearly net shaping method of nuclear power main pump case forging: 1) the barrel blank 5 is forged and processed into a barrel shape, and a hole corresponding to the nozzle core mold 6 is processed at the nozzle part.

2) The cylindrical blank 5 is heated.

3) The blank 5 is placed in the lower die 13.

4) Covering the upper die 9 and locking the upper die with the lower die 13; the nozzle core 6 is inserted into a hole in the side surface of the cylindrical blank 5.

5) The horizontal left die and the horizontal right die act to apply horizontal force to the blank for forming; after the horizontal left die and the horizontal right die extrude the blank, the blank metal flows towards the forming gap of the pipe nozzle, and the pipe nozzle of the workpiece is formed under the combined action of the upper die and the pipe nozzle core die; the blank metal flows towards the direction of the closing-in sleeve, and the closing-in of the workpiece is formed under the combined action of the closing-in forming head and the closing-in sleeve; meanwhile, the blank is extruded by the workpiece left end face forming body and the workpiece right end face forming body to form two end faces of the workpiece; the metal stock flows toward the rib forming grooves to form the ribs of the workpiece.

6) And unlocking the mold locking mechanism.

7) The mandrel flange 7 is removed.

8) And opening the upper die 9 and taking out the workpiece.

It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.

Claims

1. The utility model provides a nearly net forming die of nuclear power main pump case forging, includes mould (9), lower mould (13), horizontal left side mould (1) and horizontal right side mould (11), its characterized in that: a nozzle core mould (6) is arranged at the center of the upper mould (9), and a nozzle forming gap (8) is arranged between the nozzle core mould (6) and the upper mould (9); the lower die (13) is a groove-shaped body which is modeled with the lower part of the workpiece; the horizontal right die (11) comprises a workpiece right end face forming body (10), a central rod (14) is arranged on the workpiece right end face forming body (10), a conical closing-up forming head (15) is arranged at the end part of the central rod (14), and a guide rod (16) is arranged at the end part of the closing-up forming head (15); the horizontal left die (1) comprises a workpiece left end face forming body (4), a closing-up sleeve (3) corresponding to the closing-up forming head (15) is arranged in the workpiece left end face forming body (4), and a guide groove (2) matched with the guide rod (16) is further arranged in the horizontal left die (1).

2. The near-net-shape forming die for the pump shell forging of the nuclear power main pump according to claim 1, wherein the near-net-shape forming die comprises: and reinforcing rib forming grooves (12) are formed in the inner surfaces of the upper die (9) and the lower die (13).

3. The near-net-shape forming die for the pump shell forging of the nuclear power main pump according to claim 1, wherein the near-net-shape forming die comprises: and a mold locking mechanism (18) is arranged between the upper mold (9) and the lower mold (13).

4. The near-net-shape forming die for the pump shell forging of the nuclear power main pump according to claim 1, wherein the near-net-shape forming die comprises: the nozzle core mould (6) is fixed on an upper mould (9) through a core mould flange (7).