CN218192354U

CN218192354U - Flange forging die

Info

Publication number: CN218192354U
Application number: CN202222651424.7U
Authority: CN
Inventors: 赵星烨; 唐玉金
Original assignee: Jiangyin Kaixin Die Forging Co ltd
Current assignee: Jiangyin Kaixin Die Forging Co ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-01-03
Anticipated expiration: 2032-10-09

Abstract

The utility model discloses a flange forging die, including last mould and lower mould, be provided with preforging drift and finish forging drift on going up the mould, be provided with preforging die cavity and finish forging die cavity on the lower mould, go up the mould and be used for connecting elevating gear and make its and lower mould compound die, preforging drift and preforging die cavity cooperate and finish forging drift and finish forging die cavity cooperate under the compound die state. The flange forging die has the advantages that the pre-forging punch is matched with the pre-forging cavity in the die closing process, and meanwhile, the finish-forging punch is matched with the finish-forging cavity, so that the die can simultaneously perform pre-forging on a blank and finish-forging on a semi-finished product of a forging blank, the operation times of die closing and die splitting are reduced, the forging efficiency is improved, and the flange forging die is suitable for batch forging production of flanges.

Description

Flange forging die

Technical Field

The utility model belongs to the technical field of the flange production technique and specifically relates to a flange forging die is related to.

Background

The current processes for manufacturing the flange mainly comprise forging and casting, compared with the process for casting the flange. The forged flange has low carbon content, is not easy to rust, has good streamline form of the forged piece, and has compact structure, so the mechanical property of the forged flange is superior to that of the cast flange. The raw material for forging the flange is generally a pipe blank, the pipe blank is heated and then placed into a die, and the pipe blank is formed through strong impact force of an upper die.

In order to improve the quality of flange forging forming, in the prior art, a tube blank is usually subjected to two processing treatments of primary forging and pre-forging, for example, a forging process of a corrosion-resistant alloy flange forging uniform forming die disclosed in the chinese patent publication No. CN103551476B, the forging process comprises the steps of placing a blank into a pre-forging die to obtain a semi-finished forged blank, and then placing the semi-finished forged blank into a final forging die to obtain a flange forging finished product.

However, in the existing flange forging die, the pre-forging die and the finish forging die are mostly separated, and the pre-forging die and the finish forging die need to be driven by two independent lifting devices to carry out die closing and die splitting respectively, so that when the batch flanges are produced, the two lifting devices connected with the pre-forging die and the finish forging die need to carry out reciprocating lifting movement for many times, and the production efficiency is reduced; moreover, in the forging process, due to the existence of redundant materials, after the blank is forged, a flash is formed on the circumferential outer edge of the blank, and due to the existence of the flash, the upper die bearing surface and the lower die bearing surface in the pre-forging die and the upper die bearing surface and the lower die bearing surface in the finish forging die are difficult to fit during forging, namely, the existence of the flash hinders the die assembly operation of the upper die and the lower die in the pre-forging die and the finish forging die, so that the forging quality is influenced, the quality of a finally formed product is reduced, and defective products and waste products are generated in serious cases.

Therefore, there is a need for an improved flange forging die in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the defect that exists among the prior art, provide a flange forging die that is favorable to improving forging and pressing efficiency and forging and pressing quality.

In order to realize the technical effects, the utility model adopts the technical scheme that: a flange forging die comprises an upper die and a lower die, wherein a pre-forging punch and a finish-forging punch are arranged on the upper die, a pre-forging cavity and a finish-forging cavity are arranged on the lower die, the upper die is used for being connected with a lifting device to enable the upper die to be matched with the lower die, and the pre-forging punch is matched with the pre-forging cavity and the finish-forging punch is matched with the finish-forging cavity in a matched die state.

Preferably, in order to reduce the size of the die and make the die more compact, the pre-forging punch and the finish-forging punch are arranged in close proximity.

Preferably, in order to further reduce the size of the die and make the die more compact, the upper die has an upper impact surface which is horizontal and adjacent to the lower die, and the preforging punch and the finish forging punch are both arranged on the upper impact surface; the lower die is provided with a horizontal lower impact surface adjacent to the upper die, and the opening of the pre-forging cavity and the opening of the finish forging cavity are both arranged on the lower impact surface.

Preferably, in order to accommodate the flash scraps around the blank during forging and pressing, and ensure that the upper striking surface and the lower striking surface are tightly attached to each other in a die assembly state, the forging and pressing quality is improved, and the upper striking surface and/or the lower striking surface are/is provided with a flash accommodating recess for accommodating the flash generated during forging and pressing.

Preferably, in order to increase the capacity of accommodating the flash, so as to ensure that the upper impact surface and the lower impact surface are attached to each other after die assembly and improve the forging quality of the product, the upper impact surface and the lower impact surface are both provided with flash accommodating depressions.

Preferably, in order to prevent the flash on the semi-finished product of the forging stock from being combined with the flash on the finish forging product during forging and pressing, the flash accommodating recess comprises an upper recess arranged on the upper impact surface and two lower recesses arranged on the lower impact surface, the pre-forging punch and the finish forging punch are arranged on the inner side of the upper recess, the two lower recesses are separated, and the opening of the pre-forging cavity and the opening of the finish forging cavity are respectively arranged in the two lower recesses.

Preferably, in order to improve the pre-forging shaping quality, the pre-forging punch is cylindrical, and the bottom surface of the pre-forging punch is in transition connection with the arc of the axial outer edge of the pre-forging punch.

Preferably, in order to accommodate excess scraps on the inner side of the forged semifinished product in the finish forging, the finish forging punch is cylindrical and is provided with a stock pit on the bottom surface thereof.

Preferably, in order to ensure that the components of the blank are uniformly distributed along the circumferential direction of the blank when the blank is terminated and ensure the forging and pressing forming quality, the circumferential inner wall of the material storage recess and the finish forging punch have the same axial line.

Preferably, in order to facilitate taking out of the forged blank semi-finished product and the finish forged product, the lower die is provided with two through holes which are respectively communicated with the pre-forging cavity and the finish forging cavity and are used for the ejector rod to penetrate through, and the axial directions of the two through holes extend along the distribution direction parallel to the upper die and the lower die.

To sum up, the utility model discloses flange forging die compares with prior art, and finish forging drift and finish forging die cavity cooperate when compound die in-process preforging drift and preforging die cavity complex for this mould can carry out the preforging of blank and the semi-manufactured finish forging operation of forging stock simultaneously, has reduced the operation number of times that the compound die divides the mould, is favorable to improving forging and pressing efficiency, thereby is applicable to the batch forging production of flange.

Drawings

Fig. 1 is a schematic structural view of the present invention in a mold closing state;

FIG. 2 is a schematic structural view of the present invention in a mold-splitting state;

FIG. 3 is a schematic structural view of the lower mold of the present invention;

fig. 4 is a top view of the lower mold of the present invention;

FIG. 5 is a schematic structural view of an upper mold of the present invention;

fig. 6 is a bottom view of the upper mold of the present invention;

in the figure: 100. the upper die comprises an upper die body, a lower die body, a preforging punch head, a finish forging punch head, a preforging cavity, a finish forging cavity, a 500 preforging cavity, a 600 finish forging cavity, an upper striking surface, a 800 lower striking surface, an upper recess, a 110 lower recess, a 120 storage recess and a 130 through hole.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1-6, the utility model discloses a flange forging die, including last mould 100 and the lower mould 200 that set gradually from the top down, there are preforging drift 300 and finish forging drift 400 on the adjacent one side of last mould 100 and lower mould 200, and lower mould 200 has set gradually preforging die cavity 500 and finish forging die cavity 600 with last mould 100 is adjacent, and during the use, the high rigidity of lower mould 200 is unchangeable, goes up mould 100 and is used for connecting elevating gear in order to drive go up mould 100 and lower mould 200 compound die, and under the compound die state, preforging drift 300 cooperatees with preforging die cavity 500, and finish forging drift 400 cooperatees with finish forging die cavity 600 simultaneously.

The utility model discloses a flange forging die is when using, operating personnel can put into the blank that the pipe that needs to carry out the preforging and need carry out the finish forging (the forging stock semi-manufactured goods after the preforging is handled usually) respectively in the preforging die cavity 500 and the finish forging die cavity 600 of this mould lower mould 200, then drive by elevating system and go up mould 100 and move down, with lower mould 200 compound die, make preforging drift 300 and preforging die cavity 500 cooperate and act on the pipe, finish forging drift 400 and finish forging die cavity 600 cooperate and act on the forging stock semi-manufactured goods simultaneously, drive by elevating gear and go up mould 100 and move up again, after parting with lower mould 200, can obtain the forging stock semi-manufactured goods that the pipe was handled through the preforging and the flange product that the forging stock semi-manufactured goods was handled; then, other tube blanks needing to be subjected to pre-forging and semi-finished forging blanks needing to be subjected to finish forging are placed into the pre-forging cavity 500 and the finish forging cavity 600, and the upper die 100 and the lower die 200 are closed and then are separated to obtain semi-finished forging blanks and flange finished products. Compare the structure of preforging mould and finish forging mould phase separation among the prior art, the utility model provides a preforging drift 300 and finish forging drift 400 on an organic whole is fixed in last mould 100, by elevating gear simultaneous drive lift removal, realize simultaneously respectively to the preforging of pipe and the semi-finished finish forging operation processing of forging stock, elevating gear's operation number of times when can effectively reducing batch flange forging to improve forging and pressing efficiency, and then improve forging and pressing output in limited time.

Further, the pre-forging punch 300 and the finish-forging punch 400 are arranged in close proximity, and correspondingly, the pre-forging cavity 500 and the finish-forging cavity 600 are arranged in close proximity, so that the structure of the upper die 100 and the structure of the lower die 200 are more compact, and the occupied space of the die is reduced. One side of upper die 100 adjacent to lower die 200 is horizontal upper striking surface 700, both pre-forging punch 300 and finish forging punch 400 are disposed on upper striking surface 700, one side of lower die 200 adjacent to upper die 100 is horizontal lower striking surface 800, and both the opening of pre-forging cavity 500 and the opening of finish forging cavity 600 are disposed on lower striking surface 800. Through the setting, the pre-forging punch 300 and the finish forging punch 400 are located at the same level, and similarly, the opening of the pre-forging cavity 500 and the opening of the finish forging cavity 600 are located at the same level, so that the structural compactness of the upper die 100 and the lower die 200 is ensured.

Both the upper and lower

striking surfaces

700 and 800 are provided with flash receiving recesses for receiving flashes generated during the preliminary and preforging operations when the upper and

lower dies

100 and 200 are closed. Specifically, the flash accommodating depressions include an upper depression 900 disposed on an upper striking surface 700 and two lower depressions 110 disposed on a lower striking surface 800, wherein the preforging punch 300 and the finish forging punch 400 are located inside the upper depression 900, the two lower depressions 110 are spaced apart, and the opening of the preforging cavity 500 and the opening of the finish forging cavity 600 are disposed in the two lower depressions 110, respectively.

After the structure is adopted, when the upper die 100 and the lower die 200 are closed, the pipe blank is pre-forged and the semi-finished product of the forged blank is finish-forged, the flash generated by extruding the pipe blank and the semi-finished product of the forged blank can enter the closed space formed by combining the upper recess 900 and the two lower recesses 110, so that the upper impact surface 700 and the lower impact surface 800 are tightly attached together, the pressing-in depth of the pre-forging punch 300 in the pre-forging cavity 500 and the pressing-in depth of the finish-forging punch 400 in the finish-forging cavity 600 are ensured, the pre-forging forming quality of the pipe blank and the finish-forging forming quality of the semi-finished product of the forged blank can be further ensured, and the forging effect is improved; moreover, the two lower recesses 110 are mutually isolated, so that the flash formed by pre-forging extrusion and the flash formed by finish forging extrusion can be prevented from being connected together during forging, the blank in the pre-forging cavity 500 and the blank in the finish forging cavity 600 are mutually isolated after die division, and a forged blank semi-finished product and a flange product after forging and pressing treatment can be conveniently taken out; in addition, the number of the upper recesses 900 is one, and the pre-forging punch 300 and the finish forging punch 400 are both arranged on the inner side of the upper recess 900, so that the size of the upper recess 900 is enlarged, the contact area between the upper impact-bearing surface 700 and the lower impact-bearing surface 800 during mold closing is reduced, and the driving pressure requirement on the lifting device is reduced under the action of ensuring fixed pressure because the pressure area between the upper impact-bearing surface 700 and the lower impact-bearing surface 800 is reduced.

In order to improve the pre-forging quality, the pre-forging punch 300 is cylindrical, and the bottom surface of the pre-forging punch 300 is in arc transition connection with the axial outer edge of the pre-forging punch.

In order to improve the finish forging quality, the finish forging punch 400 is cylindrical, the bottom surface of the finish forging punch is provided with a storage pit 120, and the storage pit 120 is disc-shaped and coaxial with the finish forging punch 400, namely the circumferential inner wall of the storage pit 120 is coaxial with the finish forging punch 400. During finish forging, the storage recess 120 is formed in the bottom surface of the finish forging punch 400, so that redundant residual materials on the inner side wall of a semi-finished product of a forging blank can be conveniently stored during finish forging extrusion, and the problem that waste products or defective products are generated due to the fact that protrusions are formed on the surface of the inner wall of a finally formed flange product is avoided.

The lower die 200 is further provided with two through holes 130, the two through holes 130 are coaxial with the pre-forging die cavity 500 and the finish forging die cavity 600 respectively, the through holes 130 are used for the ejector rods to penetrate through, and the axial lines of the through holes 130 extend along the distribution direction parallel to the upper die 100 and the lower die 200.

After the upper die 100 and the lower die 200 are subjected to die closing and forging treatment, the dies are separated, at this time, two ejector rods pass through the two through holes 130 from bottom to top respectively, and the two ejector rods can eject a forged blank semi-finished product and a flange finished product out of the pre-forging die cavity 500 and the finish forging die cavity 600 after the forging treatment, so that the materials can be conveniently taken.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A flange forging die is characterized in that:

the die comprises an upper die (100) and a lower die (200), wherein a pre-forging punch (300) and a final-forging punch (400) are arranged on the upper die (100), a pre-forging cavity (500) and a final-forging cavity (600) are arranged on the lower die (200), the upper die (100) is used for being connected with a lifting device to enable the upper die to be matched with the lower die (200), and the pre-forging punch (300) is matched with the pre-forging cavity (500) and the final-forging punch (400) is matched with the final-forging cavity (600) in a matched mode state.

2. A flange forging die as claimed in claim 1, wherein: the pre-forging punch (300) and the finish-forging punch (400) are arranged in close proximity.

3. A flange forging die as claimed in claim 2, wherein: the upper die (100) is provided with an upper impact surface (700) which is horizontal and adjacent to the lower die (200), and the pre-forging punch (300) and the finish-forging punch (400) are both arranged on the upper impact surface (700); the lower die (200) is provided with a lower striking surface (800) which is horizontal and adjacent to the upper die (100), and the opening of the pre-forging cavity (500) and the opening of the finish forging cavity (600) are both arranged on the lower striking surface (800).

4. A flange forging die as claimed in claim 3, wherein: and the upper striking surface (700) and/or the lower striking surface (800) are/is provided with a flash accommodating recess for accommodating flash generated during forging and pressing.

5. A flange forging die according to claim 4, wherein: the upper striking surface (700) and the lower striking surface (800) are both provided with flash accommodating depressions.

6. A flange forging die according to claim 5, wherein: the flash holds sunken including set up in last sunken (900) on last driving face (700) with set up in two sunken (110) on lower driving face (800), preforging drift (300) with finish forging drift (400) set up in the inboard of last sunken (900), two sunken (110) are isolated down, the opening of preforging die cavity (500) with the opening of finish forging die cavity (600) sets up respectively in two sunken (110).

7. A flange forging die according to any one of claims 1 to 6, wherein: the pre-forging punch (300) is cylindrical, and the bottom surface of the pre-forging punch is in arc transition connection with the axial outer edge of the pre-forging punch.

8. A flange forging die as claimed in any one of claims 1 to 6, wherein: the finish forging punch (400) is cylindrical, and a storage recess (120) is formed in the bottom surface of the finish forging punch.

9. A flange forging die as claimed in claim 8, wherein: the circumferential inner wall of the material storage pit (120) and the finish forging punch (400) are coaxial.

10. A flange forging die as claimed in any one of claims 1 to 6, wherein: the lower die (200) is provided with two through holes (130) which are respectively communicated with the pre-forging die cavity (500) and the finish forging die cavity (600) for the ejector rods to penetrate through, and the axial directions of the two through holes (130) extend along the distribution direction which is parallel to the upper die (100) and the lower die (200).