CN112570623A

CN112570623A - Efficient high-precision forging die for inner straight hole ring piece

Info

Publication number: CN112570623A
Application number: CN202011454681.0A
Authority: CN
Inventors: 陈波; 陆以春; 王正国
Original assignee: Jiangsu Baojie Automobile Components And Parts Forging Co ltd
Current assignee: Jiangsu Baojie Automobile Components And Parts Forging Co ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-03-30

Abstract

The invention belongs to the technical field of forging dies, and particularly relates to an efficient high-precision forging die for an inner straight hole ring piece. The device comprises an upper die assembly and a lower die assembly which are arranged oppositely up and down; the lower die assembly comprises a lower die base, a forming lower die and an inner die block; the lower forming die is fixed on the lower die base, a hole which penetrates through the lower die base up and down is formed in the centers of the lower forming die and the lower die base, and an inner die block is fixed in the hole; the upper die assembly comprises a stripper plate, an upper die block and a punch; the upper module is fixed on the lower end face of the discharging plate, a hole which penetrates through the upper module and the discharging plate is formed in the centers of the upper module and the discharging plate, and the punch is arranged in the hole in a sliding mode. The forging die is reasonable in design, convenient to maintain, high in forging precision and high in raw material utilization rate, the subsequent machining workload of a forged product is less than that of a conventional forging die, and the production efficiency is improved and the production cost is reduced.

Description

Efficient high-precision forging die for inner straight hole ring piece

Technical Field

The invention belongs to the technical field of forging dies, and particularly relates to an efficient high-precision forging die for an inner straight hole ring piece.

Background

When the traditional forging mode forges the inner straight hole ring piece, the connection skin appears in the hole, and meanwhile, because the flow control to the metal blank is not fine enough, the forging precision is not high, the consumption of raw materials is increased, the burden of subsequent machining is also increased, and the subsequent machining allowance of the traditional forging process is shown in figure 1.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an efficient high-precision forging die for an inner straight hole ring piece.

In order to achieve the purpose, the invention is realized by the following technical scheme: a high-efficiency high-precision forging die for an inner straight hole ring piece comprises an upper die assembly and a lower die assembly which are arranged oppositely up and down; the lower die assembly comprises a lower die base, a forming lower die and an inner die block; the lower forming die is fixed on the lower die base, a hole which penetrates through the lower die base up and down is formed in the centers of the lower forming die and the lower die base, and an inner die block is fixed in the hole; the upper die assembly comprises a stripper plate, an upper die block and a punch; the upper module is fixed on the lower end face of the discharging plate, a hole which penetrates through the upper module and the discharging plate is formed in the centers of the upper module and the discharging plate, and the punch is arranged in the hole in a sliding mode. A circular sinking platform is arranged in the center of the upper end face of the inner module; the section of the sinking platform is matched with the section of the punch. In forging, a high-temperature metal blank is rolled into a ring shape and horizontally placed on a forming lower die, and then forging is started. In the falling process of the upper die assembly, the punch head falls down firstly to occupy the central position, and then the stripper plate drives the upper die block to fall down to forge the metal blank. Since the central position is occupied by the punch, the disordered flow of the metal blank to the center is limited and no skinning or burrs are produced. Meanwhile, after the metal blank is restricted from flowing out of order, the using amount of the metal blank can be controlled to be more accurate, the forming precision is higher, and the subsequent machining allowance is greatly reduced.

Furthermore, three layers of circular steps which descend in sequence are arranged on the lower forming die from outside to inside and are sequentially marked as a first lower step, a second lower step and a third lower step. The third lower step is obliquely arranged. The upper die block is provided with three layers of circular steps which descend in sequence from outside to inside, and the circular steps are sequentially marked as a first upper step, a second upper step and a third upper step. Through the design and improvement of the structures of the lower forming die and the upper die block, the inner straight hole ring piece which is closer to a final target product can be precisely forged, the subsequent machining allowance is further reduced, the consumption of raw materials is saved, the production efficiency is improved, and the production cost is reduced.

The first lower step and the first upper step have the same inner diameter and can be mutually abutted. When the first lower step and the first upper step are mutually abutted, the second lower step is not in contact with the second upper step, and the third lower step is not in contact with the third upper step.

Further, the punch comprises a lower punch section, an upper punch section and a limiting section; the upper punch section and the lower punch section are detachably connected up and down and have equal sections; the limiting section is integrally fixed on the upper portion of the upper punch section, and the cross section of the limiting section is larger than that of the upper punch section. In the actual production process, the lower part of the punch repeatedly experiences high temperature and high pressure impact, and is easier to wear and fatigue, and the lower punch segment can be conveniently replaced and maintained through the detachable connection of the upper punch segment and the lower punch segment, so that the whole punch is prevented from being scrapped, and the maintenance cost is reduced.

Preferably, the lower punch segment and the upper punch segment are detachably connected by a set of screws.

It should be further noted that the present invention relates only to the improvement of the upper and lower die assemblies, and not to the improvement of the die carrier structure for carrying and driving the upper and lower die assemblies. The die carrier structure is purchased from commercially available die carrier assemblies, and the die carrier structure capable of realizing asynchronous falling of the punch and the stripper can be suitable.

Has the advantages that: compared with the prior art, the efficient high-precision forging die for the inner straight hole ring piece, provided by the invention, has the advantages of reasonable design, convenience in maintenance, high forging precision and high utilization rate of raw materials, the subsequent machining workload of a product manufactured by forging is less than that of a conventional forging die, and the production efficiency is favorably improved and the production cost is favorably reduced.

Drawings

FIG. 1 is a schematic view of the machining allowance of a product obtained by a conventional forging method after peeling.

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

Fig. 3 is a schematic view of the matching of the lower forming die and the upper die block.

FIG. 4 is a schematic view of the process margin of the product produced by the present invention.

In the figure, a lower die holder 1, a lower forming die 2, an inner die block 3, a stripper plate 4, an upper die block 5, a punch 6, a counter sink 31, a first lower step 21, a second lower step 22, a third lower step 23, a first upper step 51, a second upper step 52, a third upper step 53, a lower punch section 61, an upper punch section 62 and a limiting section 63.

Detailed Description

The invention is further illustrated by the following specific examples, which are illustrative and intended to illustrate the problem and explain the invention, but not limiting.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

A high-efficiency high-precision forging die for an inner straight hole ring piece is shown in figures 2 and 3 and comprises an upper die assembly and a lower die assembly which are arranged oppositely up and down; the lower die assembly comprises a lower die base 1, a forming lower die 2 and an inner die block 3; the lower forming die 2 is fixed on the lower die base 1, a hole which penetrates through the lower die base 1 is formed in the centers of the lower forming die 2 and the lower die base 1, and an inner die block 3 is fixed in the hole; the upper die assembly comprises a stripper plate 4, an upper die block 5 and a punch 6; the upper module 5 is fixed on the lower end face of the discharging plate 4, a hole which penetrates through the upper module 5 and the discharging plate 4 is formed in the centers of the upper module 5 and the discharging plate 4, and the punch 6 is arranged in the hole in a sliding mode.

In this embodiment, a circular sinking platform 31 is arranged in the center of the upper end surface of the inner module 3; the cross section of the counter sink 31 matches the cross section of the punch 6.

In this embodiment, three layers of circular steps, which are sequentially lower, are arranged on the lower forming die 2 from outside to inside, and are sequentially referred to as a first lower step 21, a second lower step 22, and a third lower step 23. The third lower step 23 is disposed in an inclined manner.

In this embodiment, three layers of circular ring-shaped steps which descend in sequence are arranged on the upper module 5 from outside to inside, and are sequentially marked as a first upper step 51, a second upper step 52, and a third upper step 53.

In this embodiment, the first lower step 21 and the first upper step 51 have the same inner diameter and can be abutted to each other. When the first lower step 21 and the first upper step 51 are abutted against each other, the second lower step 22 is not in contact with the second upper step 52, and the third lower step 23 is not in contact with the third upper step 53.

In this embodiment, the punch 6 includes a lower punch section 61, an upper punch section 62, and a stopper section 63; the upper punch section 62 and the lower punch section 61 are detachably connected up and down and have equal sections; the limiting section 63 is integrally fixed on the upper portion of the upper punch section 62, and the cross section of the limiting section 63 is larger than that of the upper punch section 62.

In this embodiment, the lower punch segment 61 and the upper punch segment 62 are detachably connected by a set of screws.

The machining allowance of the product forged in this example is shown in fig. 4.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.

Claims

1. The utility model provides a high accuracy of interior straight hole circle spare forges mould which characterized in that: comprises an upper die component and a lower die component which are arranged oppositely up and down; the lower die assembly comprises a lower die base (1), a forming lower die (2) and an inner die block (3); the lower forming die (2) is fixed on the lower die base (1), a hole which penetrates through the lower die base (1) up and down is formed in the centers of the lower forming die (2) and the lower die base (1), and an inner die block (3) is fixed in the hole; the upper die assembly comprises a stripper plate (4), an upper die block (5) and a punch (6); the upper module (5) is fixed on the lower end face of the discharging plate (4), a hole which penetrates through the upper module (5) and the discharging plate (4) from top to bottom is formed in the center of the upper module (5) and the discharging plate (4), and the punch (6) is arranged in the hole in a sliding mode.

2. The forging die of claim 1, wherein: a round sinking platform (31) is arranged in the center of the upper end face of the inner module (3); the cross section of the sinking platform (31) is matched with the cross section of the punch (6).

3. The forging die of claim 1, wherein: three layers of circular steps which descend in sequence are arranged on the lower forming die (2) from outside to inside and are sequentially marked as a first lower step (21), a second lower step (22) and a third lower step (23).

4. The forging die of claim 3, wherein: the third lower step (23) is obliquely arranged.

5. The forging die of claim 3, wherein: the upper module (5) is provided with three layers of sequentially descending circular steps from outside to inside, and the three layers of circular steps are sequentially marked as a first upper step (51), a second upper step (52) and a third upper step (53).

6. The forging die of claim 5, wherein: the first lower step (21) and the first upper step (51) have the same inner diameter and can be abutted with each other.

7. The forging die of claim 6, wherein: when the first lower step (21) and the first upper step (51) are abutted against each other, the second lower step (22) is not in contact with the second upper step (52), and the third lower step (23) is not in contact with the third upper step (53).

8. The forging die as recited in any one of claims 1 to 7, wherein: the punch (6) comprises a lower punch section (61), an upper punch section (62) and a limiting section (63); the upper punch section (62) and the lower punch section (61) are detachably connected up and down and have equal sections; the limiting section (63) is integrally fixed to the upper portion of the upper punch section (62), and the cross section of the limiting section (63) is larger than that of the upper punch section (62).

9. The forging die of claim 8, wherein: the lower punch segment (61) and the upper punch segment (62) are detachably connected by a group of screws.