CN218361851U - Forging and pressing die - Google Patents

Abstract

The application belongs to the technical field of cold forging, and particularly provides a forging die which comprises an upper die, a lower stripper plate and a carrier; the upper die is used for bearing the pressure applied by forging equipment; the lower die is positioned below the upper die; the lower stripping plate is provided with a matching hole, and the lower die is arranged in the matching hole and matched with the matching hole to form a cavity; the carrier is placed on the lower stripper plate, and a cavity is arranged on the carrier and is placed in the cavity. Be equipped with the carrier among this application forging mould, the carrier is placed and is taken off the board under, and the die cavity in the carrier can be kept apart the lower mould and take off the clearance between the board down, places the blank in the die cavity, through continuous forging and pressing pay-off, the blank can form the forging and pressing formed part that does not have the cutting edge of a knife or a sword in this die cavity. Utilize the pressure forming spare that this application forging and pressing mould produced, compare in prior art, owing to can not appear criticizing the cutting edge of a knife or a sword problem, saved and criticized the process of cutting edge of a knife or a sword, process flow has obtained the simplification, has practiced thrift the cost of labor, has improved output efficiency.

Description

Forging and pressing die

Technical Field

The application belongs to the technical field of cold forging, and more specifically relates to a forging die.

Background

Cold forging is a general term for plastic working such as cold die forging, cold extrusion, cold heading, and the like. Cold forging is a forming process in which the material is recrystallized at a temperature lower than or equal to the recrystallization temperature, and is forging at a temperature lower than or equal to the recovery temperature. Forging without heating the blank is conventionally referred to as cold forging in production. The cold forging materials are mostly aluminum and partial alloy, copper and partial alloy, low carbon steel, medium carbon steel and low alloy structural steel which have small deformation resistance and good plasticity at room temperature. The cold forging has good surface quality and high dimensional precision, and can replace some cutting processing. The cold forging can strengthen the metal and improve the strength of the parts.

When carrying out metal machine tooling, injection moulding processing to and forge and press the forming process, because exogenic action is inhomogeneous, the incision unevenness, mouth of a river position is left over, and the ageing anastomotic nature of mould is good reason such as gapped, makes the blank appear easily criticizing the problem of cutting edge of a knife or a sword.

The sharp points refer to edges, sharp points, acute angles and the like of the finished product after processing. The edge of the batch can cause many influences in the actual production, such as bad appearance, and the edge of the batch can cut and pierce other objects seriously.

In the prior art, the batch front can be removed generally by scraping, grinding, polishing, grinding or dry ice cleaning, but these methods will undoubtedly make the process flow become fussy, increase the labor cost and reduce the output efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of this application is to provide a forging and pressing mould to there is the clearance in the cooperation of solving each part of the mould that exists among the prior art, causes the forging to produce easily and criticizes cutting edge of a knife or a sword, thereby has increased the cost of labor, has reduced the technical problem of output efficiency.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: providing a forging die which comprises an upper die, a lower stripper plate and a carrier; the upper die is used for bearing pressure applied by forging equipment; the lower die is positioned below the upper die; the lower stripping plate is provided with a matching hole, and the lower die is arranged in the matching hole and matched with the matching hole to form a cavity; the carrier is placed on the lower stripper plate, a cavity is formed in the carrier, and the cavity is placed in the cavity.

Optionally, the carrier includes a first transition structure disposed at an intersection of a bottom surface of the cavity and a side surface of the cavity.

Optionally, a cross section of the first transition structure along the depth direction of the cavity has an inner arc shape.

Optionally, the carrier further comprises a second transition structure, and the second transition structure is arranged at the intersection of the side surface of the cavity and the plate surface of the carrier.

Optionally, a cross section of the second transition structure along the depth direction of the cavity has an outer arc shape.

Optionally, a hollow-out portion is arranged on the carrier.

Optionally, the number of the hollow parts may be multiple, and the multiple hollow parts are disposed around the cavity.

Optionally, a positioning structure for positioning the carrier is disposed on the carrier.

Optionally, the positioning structure is a positioning through hole penetrating through the carrier.

Alternatively, the cavity may be provided in a plurality, and the plurality of cavities may be arranged linearly on the carrier.

Optionally, the bottom of the cavity is provided with an avoidance hole.

Optionally, one end of the upper die facing the lower die has a protruding portion for matching the shape of the top of the press formed part.

Optionally, a molding hole is formed in the lower die, and an axis of the molding hole is parallel to an axis of the matching hole.

The application provides a forging mould's beneficial effect lies in: compared with the prior art, be equipped with the carrier among this application forging mould, the carrier is placed on taking off the board under, and the die cavity in the carrier can keep apart the lower mould and take off the clearance between the board down, places the blank in the die cavity, through continuous forging and pressing pay-off, the blank can form the forging and pressing formed part that does not have the cutting edge of a knife or a sword in this die cavity. Utilize the briquetting spare that this application forging and pressing mould produced, compare in prior art, owing to can not appear criticizing cutting edge of a knife or a sword problem, saved the process of removing criticizing cutting edge of a knife or a sword, process flow has obtained the simplification, has practiced thrift the cost of labor, has improved output efficiency.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic perspective view of a forging die according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a top view of a forging die according to an embodiment of the present disclosure;

FIG. 3 isbase:Sub>A sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic structural diagram of a forging die according to an embodiment of the present disclosure in front view;

fig. 5 is a schematic bottom view of a forging die according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of an assembly structure of a lower die and a lower stripper plate in the forging die according to the embodiment of the present application;

FIG. 7 is a schematic cross-sectional view of a lower stripper plate in a forging die according to an embodiment of the present disclosure;

FIG. 8 is a schematic cross-sectional view of an upper die of a forging die according to an exemplary embodiment of the present disclosure;

FIG. 9 is a schematic perspective view of a carrier in a forging die according to an exemplary embodiment of the present disclosure;

FIG. 10 is a cross-sectional structural view of a carrier in a forging die according to an embodiment of the present application;

fig. 11 is a partially enlarged view of B in fig. 10.

Wherein, in the figures, the respective reference numerals:

100-upper mould; 101-a boss;

200-lower mould; 201-forming holes;

300-removing the plate; 301-mating holes;

400-a carrier; 401-a mould cavity; 402-a first transition structure; 403-a second transition structure; 404-hollowed-out; 405-a positioning structure; 406-avoidance holes;

500-a cavity;

600-forging the formed part.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the 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 should not be considered as limiting the present application.

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 application, "a plurality" means two or more unless specifically limited otherwise.

Cold forging and stamping are precise plastic forming techniques, have incomparable advantages of cutting and processing, such as good mechanical properties, high productivity and high material utilization rate of products, and are particularly suitable for mass production. When cold forging stamping is carried out, gaps exist among the parts of the die in a matched mode, so that the forging piece is easy to generate a batch front, and in order to remove the batch front, the batch front can be removed in a scraping mode, a grinding mode, a polishing mode, a grinding mode or a dry ice cleaning mode. However, these methods inevitably make the process flow complicated, increase the labor cost and reduce the production efficiency.

Accordingly, the present embodiment provides a forging mold, please refer to fig. 1 to 11, which includes an upper mold 100, a lower mold 200, a lower stripper plate 300 and a carrier 400; the upper die 100 is used for bearing pressure applied by forging equipment; the lower die 200 is positioned below the upper die 100; the lower stripping plate 300 is provided with a matching hole 301, the lower die 200 is installed in the matching hole 301, and the lower stripping plate 300 can move up and down relative to the lower die 200 along the axial direction of the matching hole 301 and is used for stripping materials after forging and pressing; referring to fig. 1, 6, 7 and 10, the upper surface of the lower mold 200 and the upper surface of the lower stripper plate 300 have a height difference, and a cavity 500 is formed in the fitting hole 301; the carrier 400 is placed on the lower stripper plate 300, a cavity 401 is formed in the carrier 400, and the cavity 401 can be formed by drawing a plate; a cavity 401 is placed in the cavity 500, and a blank (a workpiece before product forming) to be processed is placed in the cavity 401.

Compared with the prior art, the forging die provided by the embodiment of the application is provided with the carrier 400, the carrier 400 is placed on the lower stripping plate 300, the gap between the lower die 200 and the lower stripping plate 300 can be isolated by the cavity 401 in the carrier 400, the blank is placed in the cavity 401, and the blank can form the forging forming part 600 (a workpiece after product forming) without batch cutting edges in the cavity 401 through continuous forging feeding. Utilize the briquetting spare that this application forging and pressing mould produced, compare in prior art, owing to can not appear criticizing cutting edge of a knife or a sword problem, saved the process of removing criticizing cutting edge of a knife or a sword, process flow has obtained the simplification, has practiced thrift the cost of labor, has improved output efficiency.

In one embodiment of the present application, referring to fig. 3, 9 and 10, a first transition structure 402 is disposed at the intersection of the bottom surface of the cavity 401 and the side surface of the cavity 401.

In the embodiment of the application, the first transition structure 402 is arranged, so that a guiding effect can be achieved when a blank is placed in the cavity 401.

In the embodiment of the present application, the cross-section of the cavity 401 of the carrier 400 is elliptical, and correspondingly, the first transition structure 402 is an elliptical ring structure. It will be appreciated that the cross-section of the cavity 401 of the carrier 400 may also be other shapes, such as: square, circular, polygonal, and the like, and the specific shape may be set according to the shape of the press molding 600.

In one embodiment of the present application, referring to fig. 9 and 10, a cross-section of the first transition structure 402 along a depth direction of the cavity 401 has an inner arc shape. As shown in fig. 10, the direction indicated by the double-headed arrow in the figure is the depth direction of the cavity 401. As shown in fig. 11, the inner circular arc is a circular arc that is concave toward the inside of the cavity 401.

In one embodiment of the present application, referring to fig. 3, 9 and 10, a second transition structure 403 is provided at the intersection of the side of the cavity 401 and the plate surface of the carrier 400.

According to the embodiment of the application, the second transition structure 403 is arranged, so that the blank can be supported when the blank is placed in the cavity 401.

In an embodiment of the present application, referring to fig. 9 to 10, a cross-section of the second transition structure 403 along the depth direction of the cavity 401 has an outer arc shape. As shown in fig. 10, the direction indicated by the double-headed arrow in the figure is the depth direction of the cavity 401. As shown in fig. 11, the outer arc is an arc that is concave toward the outside of the cavity 401.

In an embodiment of the present application, referring to fig. 1 and fig. 9, a hollow portion 404 is disposed on the carrier 400. The hollow portion 404 is a process hole formed when the cavity 401 is formed. By providing the hollow portion 404 on the carrier 400, when the cavity 401 is subjected to deep drawing, the first transition structure 402 of the cavity 401 can extend toward the hollow portion 404, and thus the surface of the carrier 400 can be prevented from being wrinkled, so as to ensure the flatness of the surface of the carrier 400.

The hollow portion 404 is used as a process hole, which is formed due to process requirements, the shape of the process hole may be circular, square or any other shape, and the hollow portion 404 is a hole with an auxiliary function, so that the specific shape, the dimensional tolerance and the form and position tolerance of the hollow portion 404 may not be required, the form of the hollow portion 404 may be diversified, and the hollow portion 404 is flexible to use, and plays an important role in processing and molding the cavity 401 on the carrier 400.

In an embodiment of the present application, referring to fig. 1 and fig. 9, a plurality of the hollow portions 404 are provided, and the plurality of hollow portions 404 are disposed around the cavity 401. Through setting up a plurality of fretwork portions 404, can make the first transition structure 402 of die cavity 401 extend towards arbitrary direction, be favorable to guaranteeing the roughness of carrier 400 face more.

In one embodiment of the present application, referring to fig. 1, 2 and 9, a positioning structure 405 is disposed on the carrier 400. The positioning structure 405 is used for positioning the carrier 400 during feeding or continuous forging, so that the position deviation of the carrier 400 is avoided.

Specifically, the positioning structures 405 are positioning through holes penetrating through the carrier 400, the number of the positioning structures 405 may be four, and the four positioning structures 405 are respectively located at four corners of the board surface of the carrier 400. During feeding or continuous forging, pins on the forging equipment can be inserted into the positioning structures 405 of the carrier 400 to position the carrier 400.

In one embodiment of the present application, a plurality of cavities 401 may be disposed on the carrier 400, and the plurality of cavities 401 are linearly arranged on the carrier 400. A blank can be correspondingly placed in each cavity 401, and the machining efficiency and the productivity can be effectively improved by arranging the plurality of cavities 401.

In one embodiment of the present application, referring to fig. 3 and 9, the bottom of the cavity 401 is provided with an avoiding hole 406. Through setting up dodging hole 406, can make the bottom direct contact of blank to lower mould 200, be favorable to the shaping of blank bottom, avoid die cavity 401 bottom structure to cause the interference to the shaping of blank bottom.

In an embodiment of the present application, referring to fig. 3 and 8, an end of the upper mold 100 facing the lower mold 200 has a protrusion 101, and the protrusion 101 is used for profiling of the press-formed part 600.

The press-formed part 600 in this embodiment has a recess in the top, and the shape of the protrusion 101 of the upper die 100 matches the shape of the recess of the press-formed part 600. By providing the protrusion 101 at the bottom of the upper die 100, the protrusion 101 of the upper die 100 can press the blank during the forging, so that the top of the blank forms the recess required for forging the molded article 600.

It is understood that the structure of the raised portion 101 at the bottom of the upper die 100 is not essential, and the specific shape structure of the bottom of the upper die 100 can be determined according to the shape structure of the forging material 600 to be formed.

In an embodiment of the present application, referring to fig. 3 and fig. 6, a molding hole 201 is formed on the lower die 200, an axis of the molding hole 201 is parallel to an axis of the fitting hole 301, and the molding hole 201 is used for profiling of the forged molded part 600.

In the press-formed part 600 of the present embodiment, the bottom portion has a protruding leg, and the shape of the forming hole 201 of the lower die 200 matches the cross-sectional shape of the leg of the press-formed part 600. By providing the forming hole 201 at the top of the lower die 200, the blank can be extruded into the forming hole 201 of the lower die 200 at the time of forging molding, so that the bottom of the blank is formed into the shape of the leg required for forging the molding 600.

Specifically, the forming hole 201 is a through hole, the forming hole 201 is configured as a through hole, and after the blank is forged and formed, if the forged and formed part 600 is difficult to remove, an auxiliary tool (for example, a rod having a size smaller than the forming hole 201) can be inserted into the other end (the end far away from the forged and formed part 600) of the forming hole 201 to eject the forged and formed part 600 from the forming hole 201. The number of the coined holes 201 may be two to match the number of legs on the forging press 600, although the number of the coined holes 201 is not limited to two, and may be three, four, or even more, and the specific number may be determined by the number of legs on the forging press 600.

It is understood that the configuration of the forming hole 201 at the top of the lower die 200 is not essential, and the specific shape configuration of the top of the lower die 200 may be determined according to the shape configuration of the press-formed forging material 600 to be formed.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A forging die, comprising:

the upper die is used for bearing pressure applied by forging equipment;

the lower die is positioned below the upper die;

the lower stripping plate is provided with a matching hole, and the lower die is arranged in the matching hole and matched with the matching hole to form a cavity; and

the carrier is placed on the lower stripping plate, a cavity is formed in the carrier, and the cavity is placed in the cavity.

2. A forging die as recited in claim 1, wherein the intersection of the bottom surface of the cavity and the side surfaces of the cavity is provided with a first transition structure.

3. A forging die as recited in claim 2, wherein said first transition structure has an inner arc shape in cross section along the depth of said cavity.

4. A forging die as recited in claim 1, wherein the intersection of the sides of said cavity and the face of said carrier has a second transition.

5. A forging die as claimed in claim 4, wherein the cross-section of said second transition structure taken along the depth of said cavity is in the shape of an outer circular arc.

6. A forging die as recited in claim 1, wherein the carrier has a hollowed-out portion.

7. The forging die of claim 6, wherein the plurality of hollowed-out portions are disposed around the cavity.

8. A forging die as recited in claim 1, wherein said carrier is provided with locating structure for locating said carrier.

9. A forging die as recited in claim 8 wherein said locating feature is a locating through-hole through said carrier.

10. A forging die according to any of claims 1 to 9, wherein a plurality of cavities are provided, the cavities being arranged linearly on the carrier.

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