CN216176306U

CN216176306U - Middle groove ledge forging forming die

Info

Publication number: CN216176306U
Application number: CN202122487079.3U
Authority: CN
Inventors: 王铖; 苏凌云; 孔令飞; 张瑞亢; 胡久康
Original assignee: Shanxi Haogang Heavy Industry Co ltd
Current assignee: Shanxi Haogang Heavy Industry Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-04-05
Anticipated expiration: 2031-10-15

Abstract

The utility model belongs to the technical field of forming dies, and particularly relates to a middle ledge forging forming die which comprises an upper die and a lower die, wherein the upper die and the lower die are arranged oppositely; and after the upper die and the lower die are closed, a finish forging die cavity and a flattening die cavity are formed between the upper die and the lower die. After the upper die and the lower die are closed, a finish forging die cavity and a flattening die cavity are formed between the upper die and the lower die. The blank is flattened through the flattening die cavity, the equipment specification required by the flattening process is small, and the flattening process is easy to realize; and then, the final forging is carried out by adopting a final forging die cavity, so that the difficulty of product forming is greatly reduced, and the possibility of process realization is greatly improved.

Description

Middle groove ledge forging forming die

Technical Field

The utility model belongs to the technical field of forming dies, and particularly relates to a middle groove ledge forging forming die.

Background

The middle groove of the scraper machine is mainly used in a scraper conveyor and a reversed loader under a coal mine, is a machine body of the scraper machine, namely an important component of the middle section of the scraper machine, and consists of a ledge, a middle plate, a sealing bottom plate and other main parts, wherein the middle plate and the sealing bottom plate are processed by an abrasion-resistant plate at present, and the main purposes are to increase the abrasion resistance of the middle plate and the bottom plate and prolong the service life; the processing of ledge is a casting process at present 90%, the internal structure of the cast ledge product is loose, the inclusion is more, the structure is uneven, the stability of the heat treatment process is poor, the machining performance is poor, the finally embodied mechanical performance is poor, the shock resistance and the wear resistance are poor, the smoothness of a transition area after the two adjacent middle grooves are assembled is not high, the noise is high in the operation process of equipment, the service life of a scraper plate is short, the surface smoothness of the product is poor, the processing amount is large, and the processing process is complex.

At present, the service life of the whole middle groove is limited by the service life of the ledge, and the service life of the middle groove is correspondingly prolonged as the service life of the ledge is longer. The service life of the ledge is difficult to meet the output requirement of the current coal mine, and the strength, the impact resistance and the wear resistance of the ledge are required to be improved so as to prolong the service life of the ledge and meet the requirement of the coal mine; especially, along with the increasing development rhythm of the underground coal mine, the underground unmanned operation becomes a trend, so that the service life requirement and the quality stability of the coal mine equipment are stricter; various countries are also seeking an alternative to casting to improve the overall life of the ledge, the most common of which is: the ledge is divided into three parts, one part is a middle M-shaped groove, the middle M-shaped groove is formed by a rolling process, convex-concave ends at two ends are made by a casting mode, and finally the three parts are welded to form a whole.

Another is a way made in germany: the ledge is decomposed into 5 parts, namely a forged convex end, a forged concave end, a pushing lug, an upper ledge and a lower ledge, the upper ledge and the lower ledge are rolled out, and finally the two parts are welded, assembled and molded. The process has the defects that although the internal structure of the ledge is improved by utilizing a rolling process, the wear resistance is enhanced, the ledge and the end head are finally connected together by virtue of a welding process, the strength of the joint of the end head and the ledge is greatly reduced, a welding process is additionally added, the manufacturing cost is greatly increased, the stability of relative dimension guarantee is poor, the forged convex-concave end head has tolerance, position deviation also exists when the forged convex-concave end head is welded on the ledge, the interchangeability of each ledge can be ensured only by increasing a connecting gap tolerance zone between the ledge and the ledge, the gap tolerance between a connecting ring in a shape like a Chinese character 'ri' and the convex-concave end head is larger, the noise of equipment is large, and the market competitiveness is reduced.

If the whole forming is carried out, the existing equipment at home and abroad can not be forged and formed at present, and the narrow rib positions with complicated forming at two ends can not be completely filled, so that the forging and forming by a complete extrusion mode can not be realized.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides a middle groove ledge forging forming die which can be used for flattening a blank and then carrying out finish forging to carry out integral forming.

In order to solve the technical problems, the utility model adopts the technical scheme that:

a middle groove ledge forging forming die comprises an upper die and a lower die, wherein the upper die and the lower die are arranged oppositely, a mandril is arranged in the lower die, the mandril is connected with the lower die in a sliding manner, and the lower end of the mandril can penetrate through the lower die to extend out; and after the upper die and the lower die are closed, a finish forging die cavity and a flattening die cavity are formed between the upper die and the lower die.

The lower die is provided with a boss and the upper die is provided with a corresponding groove or the lower die is provided with a groove and the upper die is provided with a corresponding boss; and forming a flattening die cavity through the boss and the groove, and flattening the blank.

The two ends of the blank are thick, the middle of the blank is thin, and the blank is dumbbell-shaped; after flattening, the cross section of the middle part of the blank is in a convex shape with a high middle and two flat sides, and the cross sections of the two ends of the blank are in a round shape, an oval shape or a waist shape.

A guide mechanism is arranged between the upper die and the lower die; the upper die is fixedly connected with an upper die base, the lower die is fixedly connected with a lower die base, two ends of the guide mechanism are respectively and fixedly connected with the upper die base and the lower die base, the guide mechanism comprises a guide pillar and a guide sleeve, and the guide pillar is in sliding connection with the guide sleeve.

And two ends of the finish forging die cavity are provided with flash grooves.

The flattening die cavity is communicated with the finish forging die cavity through one of the flash grooves.

The flattening die is provided with a flattening die cavity II, and the flattening die cavity II can replace the flattening die cavity to flatten the blank; the flattening die comprises an upper flattening die and a lower flattening die, the upper flattening die and the lower flattening die are arranged oppositely, and a flattening die cavity II is formed after the upper flattening die and the lower flattening die are assembled.

The upper flattening die is provided with a convex part and the lower flattening die is provided with a concave part or the upper flattening die is provided with a convex part and the lower flattening die is provided with a concave part; and a second flattening die cavity is formed by the convex part and the groove part, so that the blank is flattened.

The upper die can extend into the lower die to form a closed finish forging die cavity.

Compared with the prior art, the utility model has the following beneficial effects:

after the upper die and the lower die are closed, a finish forging die cavity and a flattening die cavity are formed between the upper die and the lower die. The blank is flattened through the flattening die cavity, the equipment specification required by the flattening process is small, and the flattening process is easy to realize; and then, the final forging is carried out by adopting a final forging die cavity, so that the difficulty of product forming is greatly reduced, and the possibility of process realization is greatly improved.

The whole ledge is forged and formed in one step in a special forging mode, and the ledge has the following advantages: compared with a casting ledge, the casting ledge has the characteristics of higher strength, high impact resistance, uniform internal structure, stable heat treatment process, high comprehensive mechanical property, good wear resistance, neat appearance, stable product quality, high production efficiency, simple processing process and the like, the selected raw material is alloy steel, the hardness of the material which can be tempered can be as high as 360HB, and the wear resistance of the ledge is increased; compared with the rolled ledge of the welded end, the rolled ledge welded end has the advantages that the produced product is integral, the strength is high, the later processing procedures are reduced, the process is simple, the production period is short, and the market competitiveness is greatly improved.

Meanwhile, the utility model provides two forming dies, one is semi-closed, and the other is closed; compared with an open forging mode, the closed forging forming mode has the advantages that the material waste at two ends is less, the material utilization rate is high, the cost is low, the part which is difficult to fill is easier to fill, and the size is easy to guarantee;

the semi-closed forging forming process simplifies the difficulty of blank making, allows the redundant material in the middle part to be discharged, ensures that the positions which are difficult to be filled at the two ends are easy to be filled, and also ensures the stability of the size.

Compared with direct forging and pressing, the method has the advantages of small hitting force and long service life of the die. According to the structural particularity of the product, the final forging forming is carried out in a manner of flattening and then bending, so that the forming force required by workpiece forming is greatly reduced, the process which cannot be completed is changed into a possible process, the complexity of the process is reduced, and the batch production is easy to realize.

Drawings

FIG. 1 is an exploded view of one configuration of the present invention;

FIG. 2 is a schematic view of the structure of the lower mold of the present invention;

FIG. 3 is a schematic view of the upper die of the present invention;

FIG. 4 is a schematic structural view of the guide mechanism of the present invention;

FIG. 5 is a cross-sectional view taken along plane A of FIG. 4;

FIG. 6 is a cross-sectional view taken along plane B of FIG. 4;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

FIG. 8 is an exploded view of the crush mold of the present invention;

FIG. 9 is a schematic view of the configuration of the upper crush die of the present invention;

FIG. 10 is a schematic view of the construction of a lower crush die of the present invention;

FIG. 11 is a schematic view of the flattened blank of the present invention;

FIG. 12 is a schematic view of a flattening die according to the present invention in use;

FIG. 13 is an exploded view of another configuration of the present invention;

FIG. 14 is a schematic view of another configuration of the present invention in use;

FIG. 15 is a schematic view of the forming process of the present invention;

wherein: the die comprises an upper die 1, a lower die 2, an ejector rod 3, a finish forging die cavity 4, a flattening die cavity 5, a boss 6, a groove 7, a blank 8, a guide pillar 9, a guide sleeve 10, a flash groove 11, a flattening die 12, a flattening die cavity II 13, an upper flattening die 14, a lower flattening die 15, a protruding portion 16, a groove portion 17, an upper die base 18, a lower die base 19 and a ledge 20.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 7 and 15, a middle ledge forging and forming die comprises an upper die 1 and a lower die 2, wherein the upper die 1 and the lower die 2 are arranged oppositely, a mandril 3 is arranged in the lower die 2, the mandril 3 is connected with the lower die 2 in a sliding manner, and the lower end of the mandril 3 can penetrate through the lower die 2 to extend out; after the upper die 1 and the lower die 2 are closed, a finish forging die cavity 4 and a flattening die cavity 5 are formed between the upper die 1 and the lower die 2.

When in use, the blank 8 is placed between the upper die 1 and the lower die 2, and the blank 8 is flattened through the flattening die cavity 5; the flattened blank 8 is transferred to be located in the finish forging die cavity 4, and finish forging is performed through the finish forging die cavity 4 to obtain the ledge 20. And because the flattening process is easy to realize, and then the final forging forming is carried out by adopting a bending mode, the product forming difficulty is greatly reduced, and the process realization possibility is greatly improved.

The specific shape of the finish forging die cavity 4 can be correspondingly set according to the shape of the middle groove ledge 20; after the finish forging, the ledge 20 can be ejected by the movement of the ejector pin 3.

Further, the flattening die cavity 5 can be formed by adopting various structures, and in order to better realize the finish forging forming of the ledge 20, the following structures are preferably adopted:

a boss 6 is arranged on the lower die 2, and a corresponding groove 7 is arranged on the upper die 1, or a groove 7 is arranged on the lower die 2, and a corresponding boss 6 is arranged on the upper die 1; the blank 8 is flattened by forming a flattening die cavity 5 by the bosses 6 and the grooves 7.

Further, as shown in fig. 8, the blank 8 has thick ends and thin middle and is dumbbell-shaped; as shown in fig. 11, after being flattened, the cross section of the middle part of the blank 8 is in a shape of a convex with a high middle and two flat sides, and the cross sections of the two ends of the blank 8 are in a shape of a circle, an ellipse or a waist; the material is preferably waist-shaped, namely, the position with the diameter of two ends is pressed out of a plane, so that subsequent material arrangement is convenient.

By this shape of the blank 8, and by cooperation with the collapsing die cavity 5, the thin part in the middle has a cross-sectional shape that is high in the middle, similar to the hard-to-fill part of the product, thin on both sides, and of a thickness that is consistent with the thickness of the narrow ribs of the product.

The shape of the blank 8 after being flattened is the shape of the flattening die cavity 5; therefore, besides adopting the structural arrangement of the boss 6 and the groove 7, the person skilled in the art can also make corresponding modifications; that is, regardless of the structure of the upper mold 1 and the lower mold 2, the shape may be obtained by securing the flattening cavity 5 formed by final mold clamping and flattening the blank 8.

After the workpiece (blank 8) is flattened into the above shape, the flattened workpiece is press-bent and finish-forged in a finish-forging cavity, and the rib which is difficult to fill the middle is simply press-bent, and the portions which are easy to fill the both ends are finally molded.

Furthermore, in order to prevent the upper die 1 and the lower die 2 from being displaced in the process of die assembly, a guide mechanism is arranged between the upper die 1 and the lower die 2; two ends of the guide mechanism are respectively fixedly connected with the upper die base 18 and the lower die base 19. The guide mechanism specifically comprises a guide post 9 and a guide sleeve 10, and the guide post 9 is connected with the guide sleeve 10 in a sliding mode.

Furthermore, flash grooves 11 are formed in two ends of the finish forging die cavity 4, and compared with the existing full-open die forging, the scheme can be in a semi-closed type.

Namely, the parts which are difficult to be filled at the two ends are designed into a closed molding mode, and the middle narrow rib is designed into an open molding mode with a burr bridge part and a bin part, so that the molding has the advantages that: because the cross sections of the raw materials used by the two ends are consistent, the two ends do not need to change the cross sections after selecting proper raw materials.

The sectional areas of the middle part and the transition area are difficult to accurately calculate, and the blank manufacturing difficulty is high, so that the bridge part and the bin part which can remove redundant burrs are made in the middle part to contain redundant materials, the phenomena that the local part is difficult to fill and the thickness is thick due to the redundant materials are avoided, and the precision and the appearance quality of products are improved.

Further, the flattening die cavity 5 is communicated with the finish forging die cavity 4 through one of the flash grooves 11; of course, no communication is possible.

Furthermore, the flattening die cavity 5 and the finish forging die cavity 4 are arranged together, so that finish forging forming can be rapidly carried out after flattening, on one hand, operation is convenient, efficiency is improved, on the other hand, heat loss can be avoided, and finish forging forming is facilitated.

Of course, those skilled in the art can also adopt a split structure to arrange the two dies, and respectively arrange the flattening die cavity 5 and the finish forging die cavity 4 on different dies, that is, only the finish forging die cavity 4 is arranged on the upper die 1 and the lower die 2, so that the structural arrangement of the flattening die cavity 5 is cancelled, and the flattening die cavity 5 is arranged on the other die (the flattening die 12).

As shown in fig. 8 to 12, specifically: the flattening die 12 is provided with a flattening die cavity II 13, and the blank 8 can be flattened by the flattening die cavity II 13 instead of the flattening die cavity 5; the flattening die 12 comprises an upper flattening die 14 and a lower flattening die 15, the upper flattening die 14 and the lower flattening die 15 are arranged oppositely, and a second flattening die cavity 13 is formed after the upper flattening die 14 and the lower flattening die 15 are matched.

Further, also, in order to better form the collapsing die cavity 5, it is preferable to adopt the following structure:

the upper flattening die 14 is provided with a convex part 16 and the lower flattening die 15 is provided with a groove part 17, or the upper flattening die 14 is provided with a convex part 16 and the lower flattening die 15 is provided with a groove part 17; the second crush cavity 13 is formed by the convex portion 16 and the concave portion 17, and the blank 8 is crushed.

Similarly, when the independent flattening die cavity 5 is adopted for flattening, the blank 8 is still dumbbell-shaped with thick ends and thin middle. After being flattened, the cross section of the middle part of the blank 8 is in a convex shape with a high middle and two flat sides, and the cross sections of the two ends of the blank 8 are in a round shape, an oval shape or a waist shape. I.e. the requirements of the second flattening die cavity 13 and the second flattening die cavity 5 are consistent, and the blank 8 is ensured to be formed into the shape after being flattened.

The structural arrangement of the flattening die 12 is applicable to both the semi-closed type and the closed type; semi-closed and closed are for the structure of the finish forging die cavity 4.

Furthermore, the two ends are provided with flash grooves 11, so that a semi-closed structure can be formed; as shown in fig. 13 and 14, the structural arrangement of the flash groove 11 may be omitted so that the upper die 1 may be inserted into the lower die 2 to form the closed finish forging die cavity 4. After the finish forging cavity 4 is formed, no guide mechanism may be provided, because the upper die 1 is actually inserted to avoid the occurrence of misalignment.

Therefore, the punch of the upper die 1 completely extends into the cavity of the lower die 2 during finish forging; the scheme has the advantages that the requirements on the process of rolling and forging the blank are strict, the material distribution of each position of the product is reasonable and uniform, but the process has high material utilization rate and no material waste, and qualified products are finally produced to meet the requirements on size and appearance.

Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.

Claims

1. The utility model provides a middle part ledge forges forming die which characterized in that: the die comprises an upper die (1) and a lower die (2), wherein the upper die (1) and the lower die (2) are arranged oppositely, a mandril (3) is arranged in the lower die (2), the mandril (3) is connected with the lower die (2) in a sliding manner, and the lower end of the mandril (3) can penetrate through the lower die (2) to extend out; after the upper die (1) and the lower die (2) are closed, a finish forging die cavity (4) and a flattening die cavity (5) are formed between the upper die (1) and the lower die (2).

2. The middle ledge forging and forming die as claimed in claim 1, wherein: the lower die (2) is provided with a boss (6) and the upper die (1) is provided with a corresponding groove (7), or the lower die (2) is provided with a groove (7) and the upper die (1) is provided with a corresponding boss (6); a flattening die cavity (5) is formed by the boss (6) and the groove (7), and the blank (8) is flattened.

3. The middle ledge forging and forming die as claimed in claim 2, wherein: the two ends of the blank (8) are thick, the middle is thin and the blank is dumbbell-shaped; after flattening, the cross section of the middle part of the blank (8) is in a convex shape with a high middle and two flat sides, and the cross sections of the two ends of the blank (8) are in a round shape, an oval shape or a waist shape.

4. The middle ledge forging and forming die as claimed in claim 1, wherein: a guide mechanism is arranged between the upper die (1) and the lower die (2); the upper die (1) is fixedly connected with an upper die holder (18), the lower die (2) is fixedly connected with a lower die holder (19), two ends of a guide mechanism are respectively fixedly connected with the upper die holder (18) and the lower die holder (19), the guide mechanism comprises a guide pillar (9) and a guide sleeve (10), and the guide pillar (9) is in sliding connection with the guide sleeve (10).

5. The middle ledge forging and forming die as claimed in claim 1, wherein: and two ends of the finish forging die cavity (4) are provided with flash grooves (11).

6. The middle ledge forging and forming die as claimed in claim 5, wherein: the flattening die cavity (5) is communicated with the finish forging die cavity (4) through one of the flash grooves (11).

7. The middle ledge forging and forming die as claimed in claim 1, wherein: the device also comprises a flattening die (12), wherein the flattening die (12) is provided with a flattening die cavity II (13), and the flattening die cavity II (13) can replace the flattening die cavity (5) to flatten the blank (8); the flattening die (12) comprises an upper flattening die (14) and a lower flattening die (15), the upper flattening die (14) and the lower flattening die (15) are arranged oppositely, and a second flattening die cavity (13) is formed after the upper flattening die (14) and the lower flattening die (15) are closed.

8. The forging and forming die for the middle ledge of the slot as claimed in claim 7, wherein: the upper flattening die (14) is provided with a convex part (16) and the lower flattening die (15) is provided with a groove part (17), or the upper flattening die (14) is provided with a convex part (16) and the lower flattening die (15) is provided with a groove part (17); a second flattening cavity (13) is formed by the convex part (16) and the concave part (17), and the blank (8) is flattened.

9. The forging and forming die for the middle ledge as claimed in claim 7 or 8, wherein: the two ends of the blank (8) are thick, the middle is thin and the blank is dumbbell-shaped; after flattening, the cross section of the middle part of the blank (8) is in a convex shape with a high middle and two flat sides, and the cross sections of the two ends of the blank (8) are in a round shape, an oval shape or a waist shape.

10. The middle ledge forging and forming die as claimed in claim 1, wherein: the upper die (1) can extend into the lower die (2) to form a closed finish forging die cavity (4).