CN209902169U

CN209902169U - Ball valve end cover blank finish forging die

Info

Publication number: CN209902169U
Application number: CN201920573655.6U
Authority: CN
Inventors: 吴克成; 周亚夫; 杨柳
Original assignee: Sichuan Hongxin Energy Equipment Manufacturing Co Ltd
Current assignee: Sichuan Hongxin Energy Equipment Manufacturing Co Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-01-07
Anticipated expiration: 2029-04-24

Abstract

The utility model discloses a ball valve end cover blank finish forging die, including lower die, have vertical "T" die cavity of lining up in the lower die, still include the bottom plate mould with the coaxial setting of lower die, the uide bushing, the positioning disk, lower punch and two half rings, the bottom of positioning disk has the surrounding edge, the lower die top is arranged in to the positioning disk, and cover the top of die down through the surrounding edge, the lower part of "T" die cavity is arranged in to the bottom plate mould, bottom plate mould top surface is provided with circular arch, two half rings are installed relatively on the upper portion of "T" die cavity and enclose into "worker" word chamber of a lower extreme middle part area shallow hole with the bottom plate mould, the lower extreme of uide bushing can insert in the positioning disk, and the lower terminal surface of uide bushing flushes with the lower terminal surface of positioning disk, the lower punch can pass the uide bushing and impress "worker" word chamber, until the lower punch top surface flushes with the top surface of positioning. The subsequent machining allowance is reduced, the material consumption is reduced, the machining cost is reduced, the coaxiality is ensured, and the rejection rate is reduced.

Description

Ball valve end cover blank finish forging die

Technical Field

The utility model relates to a forge mould technical field, concretely relates to finish forging forming die structure of ball valve end cover blank.

Background

The ball valve end cover is used as a common part on a pressure pipeline and is widely applied to the technical fields of petroleum, chemical industry and the like. The ball valve end cover is generally formed by forging a blank and then machining. FIG. 1 shows a ball valve end cap with flanges at both ends, with a shallow hole at one end and a deep hole at the other end. The forging die comprises a preforging die and a finish forging die, the preforging is used for upsetting one end flange, the finish forging is used for upsetting the other end flange and punching, and the shallow hole is completed by subsequent machining.

Because the existing preforging die and finish forging die are unreasonable in design, waste products often appear due to out-of-tolerance coaxiality errors; shallow holes are not formed during forging, so that the subsequent machining allowance is large, the material consumption is large, and the machining cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a be exclusively used in fashioned finish forging die of ball valve end cover blank, reduce follow-up machining allowance, reduce material consumption, reduce the machine and add originally, ensure the axiality, reduce the rejection rate.

Therefore, the utility model discloses the technical scheme who adopts does: the utility model provides a ball valve end cover blank finish forging die, includes lower die, have vertical "T" die cavity that link up in the lower die, still include bottom plate mould, uide bushing, positioning disk, lower punch and two half rings with the coaxial setting of lower die, the bottom of positioning disk has the surrounding edge, and the lower die top is arranged in to the positioning disk, and passes through the top of die covers down in the surrounding edge, the lower part of "T" die cavity is arranged in to the bottom plate mould, and bottom plate mould top surface is provided with circular bulge, and two half rings are installed relatively on the upper portion of "T" die cavity and enclose into "worker" word chamber of a lower extreme middle part area shallow hole with the bottom plate mould, in the positioning disk can be inserted to the lower extreme of uide bushing, and the lower terminal surface of uide bushing flushes with the lower terminal surface of positioning disk, the lower punch can pass the uide bushing and impress "worker" word chamber, until the lower punch top surface flushes with the top.

The finish forging die and a matched pre-forging die are jointly used for forging and forming the ball valve end cover, a shallow hole is formed while the flange at one end of a workpiece is upset by the special pre-forging die, and then the flange at the other end and a deep hole are upset in the finish forging die in a split mode. The subsequent machining of shallow holes is not carried out separately.

Preferably, the bottom of the positioning disc is provided with a weight-reducing clearance groove, so that the weight of the positioning disc is reduced, the horizontal contact area of the positioning disc and the two half mould rings is reduced by more than half, and oxide skin and excess materials can be accumulated in the final forging process.

The utility model has the advantages that: the two half die rings and the bottom plate die are used for enclosing to form an I-shaped cavity with a shallow hole in the middle of the lower end, so that the size of a workpiece (particularly the size of the shallow hole and the deep hole) after finish forging is basically consistent with that of a product, the subsequent machining allowance and machining cost can be reduced, the material consumption is reduced, and the manufacturing efficiency is improved; the guide sleeve and the positioning disc arranged in the finish forging die and the surrounding edge on the positioning disc can effectively improve the forging coaxiality and avoid the occurrence of waste products due to the out-of-tolerance error of the coaxiality of the inner hole.

Drawings

FIG. 1 is a schematic view of a blank for a ball valve end cap.

Fig. 2 is a schematic structural diagram of the present invention.

FIG. 3 is a process flow diagram of a ball valve end cap blank.

Detailed Description

The invention will be further described by way of examples with reference to the accompanying drawings:

as shown in figure 2, the ball valve end cover blank finish forging die mainly comprises a lower concave die 1, a bottom plate die 2, a guide sleeve 3, a positioning plate 4, a lower punch 5 and two half die rings 6. The bottom plate die 2, the guide sleeve 3, the positioning plate 4, the lower punch 5 and the two half die rings 6 are coaxially arranged.

The bottom of the positioning plate 4 is provided with a surrounding edge 4a, the positioning plate 4 is arranged above the lower concave die 1, and the top of the lower concave die 1 is covered by the surrounding edge 4 a.

The lower female die 1 is internally provided with a vertically through T-shaped cavity, and a bottom die 2 and two half die rings 6 are arranged in the T-shaped cavity. The bottom plate die 2 is arranged at the lower part of the T-shaped cavity, and the top surface of the bottom plate die 2 is provided with a circular bulge 2a matched with a shallow hole of a workpiece. The two half mould rings 6 are oppositely arranged at the upper part of the T-shaped cavity and form an I-shaped cavity with a shallow hole at the middle part of the lower end with the bottom plate mould 2.

The lower extreme of uide bushing 3 can insert in positioning disk 4, and the lower terminal surface of uide bushing 3 flushes with the lower terminal surface of positioning disk 4. The lower punch 5 can penetrate through the guide sleeve 3 and be pressed into the I-shaped cavity until the top surface of the lower punch 5 is flush with the top surface of the positioning plate 4. The workpiece (particularly the sizes of the shallow hole and the deep hole) after finish forging forming is basically consistent with the product.

Preferably, the bottom of the positioning plate 4 is also provided with a weight-reducing clearance groove 4b to reduce the self weight, so that the horizontal contact area of the positioning plate 4 and the two half mould rings 6 is reduced by more than half, and oxide skin and excess materials can be accumulated in the finish forging process. Add and subtract heavy clearance groove, have triple technological effect: firstly, the weight of the positioning disc is reduced, and the manufacturing cost of the positioning disc and the downward driving force of forging equipment can be reduced; secondly, the horizontal contact area between the positioning disc and the two half die rings is reduced by more than half, and in the finish forging process, the horizontal contact area between the positioning disc and the two half die rings is too large, so that the positioning disc is easily damaged, the accuracy of centering is influenced, and finally, the coaxiality error of a product is out of tolerance and waste products are generated; and thirdly, oxide skin or trace excess materials on the outer surface of the workpiece are just extruded into the weight-reducing clearance groove in the finish forging process, the horizontal contact area between the positioning disc and the two half die rings is limited to be reduced by more than half, and the main purpose is to ensure that the positioning disc is not damaged and simultaneously have enough space for accommodating the oxide skin and the excess materials.

The bottom plate die 2 and the two half die rings 6 are arranged in the T-shaped cavity, so that the workpiece can be taken out more conveniently after being forged.

The working process is as follows: (1) taking out the workpiece after the preforging, placing the workpiece into a lower female die (provided with a bottom plate die) of a finish forging die, then placing the workpiece into two half die rings, enabling a hammer head or an upper sliding block of forging and pressing equipment to move downwards, pressing the workpiece to be equal to the top surface of a lower female die in height, and enabling the hammer head or the upper sliding block to return to an initial position; (2) sleeving a positioning disc, sequentially installing a guide sleeve and an upper punch, enabling the hammer head or the upper sliding block to move downwards, pressing the upper punch to a position which is equal to the upper end surface of the guide sleeve in height, and returning the hammer head or the upper sliding block to an initial position to finish the process of upsetting the flange; (3) sequentially taking off the guide sleeve and the positioning disc, enabling the hammer head or the upper sliding block to move downwards, pressing the upper punch head to a final position, returning the hammer head or the upper sliding block to an initial position, and taking out the upper punch head to complete a punching process; (4) and the hammer head or the upper sliding block descends to the top surface of the lower female die again to level the workpiece, the hammer head or the upper sliding block returns to the initial position, the workpiece is taken out, the bottom plate die and the half die ring are removed, and the finish forging forming of the workpiece is completed.

Referring to fig. 3, the ball valve end cover blank sequentially undergoes four processes of blanking, pre-forging, finish forging and punching and connecting skin.

Claims

1. The utility model provides a ball valve end cover blank finish forging die, includes lower die (1), have vertical "T" die cavity that link up in lower die (1), its characterized in that: the die is characterized by further comprising a bottom plate die (2) which is coaxial with the lower female die (1), a guide sleeve (3), a positioning disc (4), a lower punch (5) and two half die rings (6), wherein a surrounding edge (4a) is arranged at the bottom of the positioning disc (4), the positioning disc (4) is arranged above the lower female die (1), the top of the lower female die (1) is covered by the surrounding edge (4a), the bottom plate die (2) is arranged at the lower part of the T-shaped cavity, a circular bulge (2a) is arranged on the top surface of the bottom plate die (2), the two half die rings (6) are oppositely arranged on the upper part of the T-shaped cavity and surround the bottom plate die (2) to form an I-shaped cavity with a shallow hole in the middle of the lower end, the lower end of the guide sleeve (3) can be inserted into the positioning disc (4), the lower end face of the guide sleeve (3) is flush with the lower end face of the positioning disc (4), and the lower punch (5) can penetrate through the guide sleeve (3) and be pressed into, until the top surface of the lower punch (5) is flush with the top surface of the positioning disk (4).

2. A ball valve end closure blank finish forging die according to claim 1, wherein: the bottom of the positioning disc (4) is also provided with a weight-reducing clearance groove (4b) to reduce the self weight, so that the horizontal contact area of the positioning disc (4) and the two half die rings (6) is reduced by more than half, and oxide skin and excess materials can be accumulated in the finish forging process.