Forging die for valve body of single-flange plug valve

Abstract

The utility model discloses a forging die of a single flange plug valve body, which comprises a lower die holder and an upper die holder, a lower forming die core is arranged on the lower die holder, two ends of the lower forming die core are respectively provided with a semi-arc lower forming portion protruding in the radial direction, the middle of the lower forming die core is provided with a semi-arc groove portion, and the semi-arc groove portion is provided with a semi-arc groove. Two semicircular arc body upper forming parts are arranged on the upper die base, an upper forming baffle is arranged between the two semicircular arc body upper forming parts, a forming punch is vertically arranged in the middle of the upper forming baffle, a guide ring and a first pressing head are arranged on the outer side of one end of one semicircular arc body lower forming part, and the first pressing head is axially arranged and penetrates through the guide ring. Side baffles are arranged on the outer side of one end of the other semi-arc lower forming part and the outer side of one end of the other semi-arc upper forming part, and second pressing heads are arranged on the outer sides of the side baffles. The forging die for the single-flange plug valve body is used for forging the plug valve body, the machining efficiency is high, and the flange performance is good.

Description

Technical Field

[0001] The utility model relates to a forging die for a single-flange plug valve body, belonging to the technical field of forging dies. Background Art

[0002] The plug valve bodies on the market generally adopt a structure in which the flange is welded to the valve body, and then the flange is used to connect the pipeline. This flange welding method usually has the following disadvantages: (1) The flange and the valve body are processed separately, which increases the manufacturing cost; (2) The flange needs to be welded to the valve body, which increases the welding and heat treatment costs; (3) The strength of the circumferential weld is low, the stress state is not good, and gaps are prone to exist in the pipeline system.

[0003] The patent with authorization announcement number CN N 218532673 U discloses a valve body forging die, which relates to the technical field of forging dies. The utility model includes a lower die, an upper die and a water pipe. The lower die and the upper die are both provided with cooling grooves. The side walls of the lower die and the upper die are respectively connected with a first liquid inlet pipe and a second liquid inlet pipe. One end of the first liquid inlet pipe and the second liquid inlet pipe are both connected to the cooling groove. A connecting pipe is connected between the water pipe and the first liquid inlet pipe. A metal hose is connected between the water pipe and the second liquid inlet pipe. The other side wall of the cooling groove is connected with a liquid outlet pipe. The utility model allows an external cold water source to enter the cooling groove by setting a water pipe, a connecting pipe, a metal hose and a cooling groove, so that the cooling groove can be cooled continuously. The water supply of the lower die and the upper die is consistent, which can ensure the consistency of cooling between the two modules, avoid the different temperatures of the two modules affecting the forming of the workpiece, and ensure the stability of the forming of the workpiece. However, the utility model mold is not suitable for forging the valve body of a plug valve. Utility Model Content

[0004] The utility model mainly solves the technical problem of providing a forging die for a single-flange plug valve body. The forging die for the single-flange plug valve body is used for forging processing of the plug valve body, has high processing efficiency and good flange performance.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: to provide a forging die for a single-flange plug valve body, including a lower die seat and an upper die seat, the upper die seat is located above the lower die seat, a lower forming die core is arranged on the lower die seat, two ends of the lower forming die core are respectively provided with a radially protruding semi-circular arc lower forming part, the middle part of the lower forming die core is provided with a semi-circular arc groove part, two semi-circular arc upper forming parts are arranged on the upper die seat, the two semi-circular arc upper forming parts are axially symmetrical with the two semi-circular arc lower forming parts, an upper forming baffle is arranged between the two semi-circular arc upper forming parts, a forming punch is vertically arranged in the middle part of the upper forming baffle, and the forming punch protrudes radially downward On the upper forming baffle, a guide ring and a first pressing head are arranged on the outer side of one end of the lower forming part of the semicircular arc body and the outer side of one end of the upper forming part of the semicircular arc body, the first pressing head is axially arranged, the first pressing head passes through the guide ring, the outer end of the first pressing head blocks the outer side of one end of the lower forming part of the semicircular arc body and the outer side of one end of the upper forming part of the semicircular arc body, and a side baffle is arranged on the outer side of one end of the lower forming part of another semicircular arc body and the outer side of one end of the upper forming part of another semicircular arc body, the side baffle is axially arranged, the upper end of the outer edge of the side baffle contacts with the upper die seat, the lower end of the outer edge of the side baffle contacts with the lower die seat, and a second pressing head is arranged on the outer side of the side baffle, and the second pressing head is coaxial with the first pressing head.

[0006] Preferably, the forming punch is hemispherical.

[0007] Preferably, a connecting portion is provided on the top of the forming punch.

[0008] Preferably, the second pressing head is located between the lower die base and the upper die base.

[0009] The beneficial effects of the utility model are as follows: the forging die of the single-flange plug valve body of the utility model is used for forging processing of the single-flange plug valve body, which reduces the subsequent welding and heat treatment costs, avoids the gap left by welding the flange and the valve body, and improves the performance of the flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0011] Figure 1 It is a schematic diagram of a forging die of a single flange plug valve body of the utility model in an embodiment. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] See also Figure 1 The utility model embodiment includes: a forging die for a single-flange plug valve body, which includes a lower die seat 1 and an upper die seat 2, the upper die seat 2 is located above the lower die seat 1, and a lower forming die core 3 is arranged on the lower die seat 1, and two ends of the lower forming die core 3 are respectively provided with a radially protruding semi-circular arc lower forming part 4, and a semi-circular arc groove part 5 is arranged in the middle of the lower forming die core 3, and the semi-circular arc groove part 5 is also a part of the mold cavity. Two semi-circular arc upper forming parts 6 are arranged on the upper die seat 2, and the two semi-circular arc upper forming parts 6 are axially symmetrically arranged with the two semi-circular arc lower forming parts 4, and an upper forming baffle 7 is arranged between the two semi-circular arc upper forming parts 6, and a forming punch 8 is vertically arranged in the middle of the upper forming baffle 7, and the forming punch 8 radially protrudes downward from the upper forming baffle 7, and the semi-circular arc lower forming part 6 is arranged on the upper die seat 2. A guide ring 9 and a first press head 10 are arranged on the outer side of one end of the forming part 4 and the outer side of one end of the forming part 6 on the semicircular body. The first press head 10 is axially arranged and passes through the guide ring 9. The guide ring 9 guides the movement of the first press head 10. The outer end of the first press head 10 blocks the outer side of one end of the lower forming part 4 of the semicircular body and the outer side of one end of the upper forming part 6 of the semicircular body. A side baffle 11 is arranged on the outer side of one end of the lower forming part 4 of the semicircular body and the outer side of one end of the upper forming part 6 of the semicircular body. The side baffle 11 is axially arranged, and the upper end of the outer edge of the side baffle 11 contacts the upper die seat 2, and the lower end of the outer edge of the side baffle 11 contacts the lower die seat 1. A second press head 12 is arranged on the outer side of the side baffle 11, and the second press head 12 is coaxial with the first press head 10. The two semi-circular arc lower forming parts 4, the semi-circular arc groove part 5, the two semi-circular arc upper forming parts 6, the upper forming baffle 7, the first pressing head 10 and the second pressing head 12 together form a forming cavity.

[0014] Preferably, the forming punch 8 is hemispherical.

[0015] Preferably, a connecting portion 13 is provided on the top of the forming punch 8, and the connecting portion 13 is connected to the driving mechanism of the mold.

[0016] Preferably, the second pressing head 12 is located between the lower die base 1 and the upper die base 2 .

[0017] When the forging die of the single flange plug valve body of the utility model is working, the raw material bar is heated to the initial forging temperature and placed in the cavity. The bar is placed parallel to the center line of the first ram 10 and the second ram 12, and then the upper forming baffle 7 and the forming punch 8 are pushed downward by the multi-directional die forging hydraulic press. The first ram 10 and the second ram 12 move toward the bar respectively to extrude the bar, so that the valve body 13 and the flange 14 are integrally formed in one forging process. The second ram 12 pushes the side baffle 11 to support one end of the bar for forming the flange 14. The first ram 10 extrude the other end of the bar, and the lower forming part 4 of the semicircular body and the upper forming part 6 of the semicircular body extrude the neck 15 of the valve body, and the forming punch 8 extrude the blind hole 16 of the valve body. Through the one-time forming process of the forging die, the subsequent welding and heat treatment costs are reduced, the gap left by the welding of the flange and the valve body is avoided, and the performance of the flange is improved.

Claims

1. A forging die for a single-flange plug valve body, comprising a lower die seat and an upper die seat, wherein the upper die seat is located above the lower die seat, and a lower forming die core is arranged on the lower die seat, characterized in that: The two ends of the lower forming die core are respectively provided with a radially protruding semi-circular arc lower forming part, the middle part of the lower forming die core is provided with a semi-circular arc groove part, and the upper die seat is provided with two semi-circular arc upper forming parts, the two semi-circular arc upper forming parts are axially symmetrically arranged with the two semi-circular arc lower forming parts, an upper forming baffle is arranged between the two semi-circular arc upper forming parts, and a forming punch is vertically arranged in the middle part of the upper forming baffle, and the forming punch radially protrudes downward from the upper forming baffle, and the outer side of one end of the semi-circular arc lower forming part and the outer side of one end of the semi-circular arc upper forming part A guide ring and a first pressing head are provided, the first pressing head is axially arranged, the first pressing head passes through the guide ring, the outer end of the first pressing head blocks the outer side of one end of the lower forming part of the semicircular arc body and the outer side of one end of the upper forming part of the semicircular arc body, a side baffle is provided on the outer side of one end of the lower forming part of another semicircular arc body and the outer side of one end of the upper forming part of another semicircular arc body, the side baffle is axially arranged, the upper end of the outer edge of the side baffle contacts with the upper die seat, the lower end of the outer edge of the side baffle contacts with the lower die seat, a second pressing head is provided on the outer side of the side baffle, and the second pressing head is coaxial with the first pressing head.

2. The forging die for the single flange plug valve body according to claim 1, characterized in that: The forming punch is a hemispherical body.

3. The forging die for the single flange plug valve body according to claim 2, characterized in that: A connecting portion is provided on the top of the forming punch.

4. The forging die for the single flange plug valve body according to claim 3, characterized in that: The second pressing head is located between the lower die seat and the upper die seat.

Images