CN212094327U - Die assembly - Google Patents

Abstract

The utility model provides a mould component, which comprises a lower mould, a female mould and a female mould sleeve; the female die comprises a first guide cavity which is sleeved outside the lower die and used for guiding, and the female die sleeve comprises a second guide cavity which is sleeved outside the lower die and used for guiding; through changing the structure of the female die sleeve, the female die sleeve can realize the guiding function of the female die, and further can correspondingly reduce the height of the female die, thereby solving the problems of large overall size and weight, low rigidity, high manufacturing cost, inconvenience in installation and the like of the die assembly.

Description

Die assembly

Technical Field

The utility model relates to a powder metallurgy technical field especially relates to a mould subassembly.

Background

The powder metallurgy technology combines material science, metal forming technology and mechanics perfectly, and becomes a novel machining technology with little cutting or no cutting. The powder metallurgy technology has the advantages of high efficiency, material saving and energy saving.

The powder metallurgy forming cavity die is generally divided into a through type cavity die and a shoulder type cavity die according to the structure of a product. When the product external diameter ratio D/D is less than or equal to 1.25 and the step thickness is thinner, a female die with a shoulder is usually selected for molding.

FIG. 1 is a schematic view of a prior art mold assembly. As shown in fig. 1, the conventional die assembly includes an upper die 1, a female die 2, a female die case 3, a lower die 4, and a core rod 5. Wherein the female die sleeve 3 is sleeved outside the female die 2, and because the step end face of the female die 2 can bear great downward pressing pressure in the forming process, the female die 2 and the female die sleeve 3 cannot slip, the inner cavity of the female die sleeve 3 is designed into a step face, the step thickness is generally 25-30mm, but the length of the matched section of the female die 2 and the lower die 4 is unchanged, the lower die 4 correspondingly increases unnecessary length for ensuring that the female die 2 does not collide with each other, and the length of the core rod 5 is correspondingly increased. Thus, on the one hand, the longer mold leads to a reduction in rigidity and a reduction in the life of the mold, and on the other hand, the mold material is generally made of expensive mold steel, and the longer length also leads to an increase in the manufacturing cost of the mold. In addition, the structure also causes the weight of the die assembly to be large, and the die assembly is not easy to install during die calibration.

Therefore, it is desirable to provide a mold assembly to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a mold assembly, mold assembly makes through the structure that changes female die sleeve can realize female die's guide function, and then can correspondingly reduce the height of female die, thereby can solve mold assembly overall dimension and weight are great, the rigidity is lower, manufacturing cost is higher and the inconvenient scheduling problem of installation.

In order to achieve the purpose, the mold assembly of the utility model adopts the following technical scheme.

The utility model provides a mold assembly, mold assembly includes: the female die comprises a die cavity and a first guide cavity which are communicated with each other, the first guide cavity is sleeved outside the lower die, and the inner surface of the first guide cavity is matched with the outer surface of the lower die and at least used for guiding the lower die; and the female die sleeve comprises an accommodating cavity sleeved outside the female die and a second guide cavity sleeved outside the lower die, and the inner surface of the second guide cavity is matched with the outer surface of the lower die and is at least used for guiding the lower die.

Further, the second guide cavity is coaxial with the first guide cavity and has the same size.

Further, the lower die is the same as the fit clearance of the first guide cavity and the second guide cavity.

Further, the roughness of the inner surface of the first guide cavity is the same as that of the second guide cavity.

Furthermore, the containing cavity and the second guide cavity are directly communicated with each other to form a step-shaped through cavity.

Further, the cavity comprises a female die shoulder.

Further, the female die and the female die sleeve are in interference fit.

Furthermore, a bulge is annularly arranged on the outer side surface of the second guide cavity.

Furthermore, a plurality of mounting holes are formed on the end surface of the female die sleeve on one side close to the cavity.

The mould subassembly has following beneficial effect:

the die assembly of the utility model can effectively reduce the height of the female die and the height of the whole die assembly by improving the structure of the female die sleeve to use the female die sleeve for guiding, thereby reducing the whole weight of the die assembly and reducing the consumption of die materials; in addition, the height of the female die is reduced, and the heights of the outer die and the core rod are correspondingly reduced, so that the rigidity of the whole die assembly is correspondingly increased, and the service life of the whole die assembly can be prolonged; finally, the whole advantage that still has the easy to use installation of mould subassembly.

Drawings

The technical solution and other advantages of the present invention will become apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a conventional mold assembly.

Fig. 2 is a schematic structural view of the mold assembly of the present invention.

Fig. 3 is a schematic view of the assembly of the female mold and the female mold sleeve according to the present invention.

The reference numbers in the drawings are respectively:

1. an upper die;

2. a female die;

20. a female mould cavity;

21. a shaped cavity;

22. a first guide chamber;

211. the female die is provided with a shoulder;

3. a female die sleeve;

30. a stepped through cavity;

31. a second guide chamber;

32. an accommodating chamber;

33. a protrusion;

34. mounting holes;

4. a lower die;

5. a core rod;

6. and (3) a blank.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

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", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

In order to solve the problems that the whole size and the weight of the mold are large, the rigidity is low, the manufacturing cost is high, the mold is not easy to install and the like of the existing mold assembly, the applicant carries out improved design on the existing mold assembly and provides the mold assembly.

Fig. 2 is the structure schematic diagram of the mold assembly of the present invention, and fig. 3 is the schematic diagram of the assembly of the female mold and the female mold sleeve of the present invention. The structure and effect of the mold assembly according to the present invention will be described in detail with reference to fig. 2 and 3.

As shown in fig. 2 and 3, the present invention provides a mold assembly, which includes: an upper die 1, a female die 2, a female die sleeve 3, a lower die 4 and a core rod 5. The female die 2 is sleeved inside the female die sleeve 3, the lower die 4 is sleeved inside the female die 2 and the female die sleeve 3, the upper die 1 is sleeved inside the female die 2, and the mandrel 5 is sleeved inside the lower die 4 and the upper die 1. The upper die 1, the female die 2, the lower die 4 and the core rod 5 jointly form a preset forming cavity for shaping or pressing parts.

Referring to fig. 2 and fig. 3, the female mold 2 has a female mold cavity 20 (not labeled), the female mold cavity 20 includes a mold cavity 21 and a first guiding cavity 22, the lower mold 4 is sleeved in the first guiding cavity 22, an inner surface of the first guiding cavity 22 is matched with an outer surface of the lower mold 4, and the first guiding cavity 22 is at least used for guiding the lower mold 4.

It is clear that the inner surface of the cavity 21, in cooperation with the end surface of the upper die 1, the end surface of the lower die 4 and the outer surface of the mandrel 5, constitutes a predetermined forming cavity for at least the pressing or shaping of the part. The first guide chamber 22 serves at least for guiding.

In particular, said shaped cavity 21 further comprises a female die shoulder 211. That is, the female mold 21 includes a female mold shoulder 211 therein, or the female mold 2 is referred to as a shoulder female mold. In practice, the female die shoulder 211 is used for forming or pressing a step structure or flange of a part or blank.

Referring to fig. 2 and 3, the female die sleeve 3 includes a receiving cavity 32 sleeved outside the female die 2 and a second guiding cavity 31 sleeved outside the lower die 4, and an inner surface of the second guiding cavity 31 is matched with an outer surface of the lower die 4 and at least used for guiding the lower die 4.

It is clear that, when the first guide cavity 22 can cooperate and guide the lower die 4 inserted in the female die cavity 20, the second guide cavity 31 can likewise cooperate and guide the lower die 4. That is, by changing the structure of the female die sleeve 3 or changing the matching relationship between the female die sleeve 3 and the lower die 4, the female die sleeve 3 can guide the lower die 4, and the female die sleeve 3 has a function for realizing the guiding function of the female die 2, so that the female die sleeve 3 can replace or equivalently replace at least part of the guiding structure of the female die 2.

In the present exemplary embodiment, the length of the second guide chamber 31 can be up to 25mm, and correspondingly, the length of the second guide chamber 21 of the female die 22 for guiding can also be shortened by 25mm, so that the length of the female die 22 can also be shortened by 25 mm.

To sum up, the mould subassembly is through changing the structure of female die sleeve 3 is used for realizing the function of the guide effect of bed die 2 to can realize substituting or equivalent replacement with bed die sleeve 3 the at least partial guide structure of bed die 2, and then can reduce correspondingly the height of bed die 2.

Further, according to the structure of the entire mold assembly, when the length of the female mold 22 is shortened, the length of another mold assembly corresponding to the length of the female mold 22 can be shortened accordingly. For example, after the height of the female die 2 is reduced, the height of the lower die 4 or the mandrel 5 can be reduced accordingly. Accordingly, the overall rigidity of the mold assembly is improved, the service life is prolonged, and the material consumption and the overall weight of the mold are reduced. Therefore, the mould subassembly can solve the great, rigidity lower, the manufacturing cost higher and difficult installation scheduling problem of length of current mould subassembly.

In particular, the second guide cavity 31 is coaxial and of the same size as the first guide cavity 22. By adjusting the size and position of the second guiding cavity 22, the second guiding cavity 31 can better replace the guiding function of the first guiding cavity 22, and the precision of the die assembly is improved.

Specifically, the roughness of the inner surfaces of the first guide cavity 22 and the second guide cavity 31 is the same, and the fit clearance between the lower die 4 and the first guide cavity 22 and the second guide cavity 31 is the same. The second guiding cavity 31 can achieve the same guiding effect as the first guiding cavity 22 by adjusting the surface roughness and the fit clearance.

In the present embodiment, the roughness of the inner surfaces of the first guide cavity 22 and the second guide cavity 31 is 0.2, respectively.

Referring to fig. 2 and 3, the accommodating chamber 32 and the second guiding chamber 31 are directly connected to form a stepped through chamber 30 (not shown). The containing cavity 21 is sleeved outside the female die 2, and the second guiding cavity 22 is sleeved outside the outer die 4, and obviously, the inner diameter of the containing cavity 21 can be set to be larger than that of the second guiding cavity 22. Therefore, the female die sleeve 3 still has the effect of preventing the female die 2 from slipping off.

Based on the above reason, work as when the bed die 2 is the shoulder bed die, 2 step end faces of bed die can receive during very big decurrent suppression pressure, mould assembly also can satisfy production and design demand. In short, the mold assembly of the present invention can be used for a flange surface or step surface structure of a blank.

Specifically, the female die 2 and the female die protector 3 are in interference fit. That is, the outer surface of the female mold 2 is interference-fitted with the inner surface of the accommodating chamber 32.

Through adopting interference fit, make the bed die 2 with the bed die protects 3 and has certain wearability and toughness for bed die 2 does not receive the damage of any resistance and suppression material, need not scrap whole mould when meetting certain position damage in actual production, only needs to change certain spare part in the middle of, bed die 2 after changing the spare part is identical with before in the result of use completely, has not only saved a large amount of time, has also practiced thrift a large amount of costs and resources simultaneously.

In the embodiment, the female die sleeve 3 and the female die 2 are in shrink fit, and the interference magnitude of the two is 0.2-0.4 mm.

Specifically, a protrusion 33 is annularly provided on the outer side surface of the second guide chamber 31. Namely, a protrusion 33 is annularly arranged at one end of the outer side surface of the female die sleeve 3 far away from the cavity 21.

Specifically, a plurality of mounting holes 34 are formed on an end surface of the female die case 3 on a side close to the cavity 21.

In specific implementation, the female die sleeve 3 is made of steel, and the female die 2 is made of hard alloy.

The die assembly of the utility model uses the female die sleeve 3 for guiding by improving the structure of the female die sleeve 3, thereby effectively reducing the height of the female die 2 and the height of the whole die assembly, and further reducing the whole weight of the die assembly and the consumption of die materials; further, when the height of the cavity block 2 is reduced and the heights of the outer die 4 and the core rod 5 are also reduced, the rigidity of the entire die assembly is increased, and the life of the entire die assembly can be increased. Finally, the whole advantage that still has the easy to use installation of mould subassembly.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above detailed description is made on a mold assembly provided by the embodiment of the present invention, and the principle and the implementation of the present invention are explained by applying a specific example, and the description of the above embodiment is only used to help understanding the technical solution and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present invention in its various embodiments.

Claims (9)

1. A mold assembly, comprising:

a lower die, a lower die and a lower die,

the female die comprises a die cavity and a first guide cavity which are communicated with each other, the first guide cavity is sleeved outside the lower die, and the inner surface of the first guide cavity is matched with the outer surface of the lower die and is at least used for guiding the lower die; and the number of the first and second groups,

and the female die sleeve comprises a containing cavity sleeved outside the female die and a second guide cavity sleeved outside the lower die, and the inner surface of the second guide cavity is matched with the outer surface of the lower die and is at least used for guiding the lower die.

2. The mold assembly of claim 1, wherein the second guide cavity is coaxial with and the same size as the first guide cavity.

3. The mold assembly of claim 1, wherein the lower mold has the same fit clearance with the first guide cavity and the second guide cavity.

4. The mold assembly of claim 1, wherein the first guide cavity and the second guide cavity have the same inner surface roughness.

5. The mold assembly of claim 1, wherein said receiving cavity and said second guiding cavity are in direct communication with each other to form a stepped through cavity.

6. The mold assembly of claim 1, wherein the cavity comprises a female mold shoulder.

7. The mold assembly of claim 1, wherein the female mold and the female mold sleeve are an interference fit.

8. The mold assembly of claim 1, wherein a projection is disposed around an outer side of the second guide cavity.

9. A die assembly according to claim 1, wherein a plurality of mounting holes are formed in an end face of the female die sleeve on a side thereof adjacent to the cavity.

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