JP2008183567A - Forging die apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forging die apparatus which prevents defective thickness deviation of moldings without causing deviation of flow of a blank thickness when forging is applied. <P>SOLUTION: This forging die apparatus 1 is provided with: a first floating sleeve 19 which is arranged in a lower die body 16 so as to be freely slidable in vertical direction and supports the lower surface of a blank 100 before-forming; and a second floating sleeve 25 which is arranged so as to be freely slidable on the outer peripheral surface of this first floating sleeve 19 and holds the outer peripheral surface of the blank 100 before-forming. Therefore, just before forming, the blank 100 before-forming can surely be positioned and in a process of forging, the rapid bulging to the horizontal direction of the blank 100 before-forming, is prevented so as to prevent defective thickness deviation of the moldings 110 without causing deviation of flow of the blank thickness. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a forging die apparatus that sandwiches a pre-molding material between an upper mold and a lower mold and presses the pre-molding material by forging into a predetermined shape.

A conventional forging die apparatus will be described with reference to FIG.
As shown in FIG. 5B, the conventional forging die apparatus 50 shown in FIG. 4 presses a cylindrical pre-formation material 100 as shown in FIG. In addition, it has been used when forging a molded product 110 having a disc shape and having frustoconical concave portions 111 and 111 at the center portions of the upper surface and the lower surface.

A conventional forging die device 50 is connected to a pressing device (not shown), has an upper die 2 that reciprocates in the vertical direction, and a recess 4 in which the upper die 2 is accommodated, and is fixed to a fixed base 5. A mold 3 is provided.
The upper die 2 includes a cylindrical upper die body 10 and an upper punch that is integrally inserted into the upper die body 10 so that a frustoconical lower end projects downward from the lower surface thereof. 11. Further, a hold pin 12 that can be projected and retracted from the flat surface at the lower end thereof and slides in the vertical direction is inserted into the upper punch 11. The lower surface of the hold pin 12 comes into contact with the central portion of the upper surface of the pre-molding material 100.

On the other hand, the lower mold 3 is fixed to a fixing base 5 including a cylindrical upper fixing base 5a and a lower fixing base 5c via a fixing tool 15 or the like. The lower mold 3 includes a lower mold body 16 that is cylindrical, has a circular shape when viewed from above, and has a recess 4 with a predetermined depth, and an upper end in a truncated cone shape from the bottom surface of the recess 4 inside the lower mold body 16. The lower punch 17 is integrally inserted so that the portion protrudes upward. The inner peripheral diameter of the recess 4 provided in the lower mold main body 16 is substantially the same as the outer peripheral diameter of the upper mold main body 10 and substantially the same as the outer peripheral diameter of the molded product 110. The lower punch 17 has a lower end fixed to the lower stage fixing base 5 c and extends upward in the upper stage fixing base 5 a and the lower mold body 16, and a frustoconical upper end part is a recess of the lower mold body 16. 4 protrudes upward from the bottom surface.
In addition, a cylindrical sleeve 18 ′ which can be projected and retracted from the bottom surface of the recess 4 of the lower mold body 16 and slides in the vertical direction is provided on the outer peripheral surface of the lower punch 17 in the lower mold body 16. An annular claw portion 18a ′ projecting outward is provided around the lower end portion of the sleeve 18 ′.

  Further, the inner wall surface of the lower end portion of the upper stage fixing base 5a of the fixing base 5 is provided with a recessed portion 5d having a predetermined height in which an annular claw portion 18a ′ provided at the lower end portion of the sleeve 18 ′ slides in the vertical direction. Yes. The upper surfaces of a plurality of sliding pins 30 that are inserted through the lower fixing base 5c and are slidable in the vertical direction are respectively brought into contact with the lower surface of the annular claw portion 18a ′ of the sleeve 18 ′. By driving, the sleeve 18 'is slidable in the vertical direction.

Next, a molding process for forging the molded product 110 shown in FIG. 5B from the raw material 100 shown in FIG. 5A using the conventional forging die apparatus 50 will be described.
First, as shown in FIG. 4A, the hold pin 12 protrudes downward from the lower surface of the upper punch 11 of the upper mold 2 and the sleeve 18 ′ protrudes upward from the bottom surface of the recess 4 of the lower mold body 16. Thus, the cylindrical pre-molding material 100 is sandwiched between the hold pins 12 and the sleeve 18 '.
Next, as shown in FIG. 4B, the upper mold 2 is lowered, the upper mold 2 is accommodated in the recess 4 of the lower mold body 16, and the pre-molding material 100 is pressurized. Then, the hold pin 12 retreats into the upper punch 11 relative to the lowering of the upper die 2, and the sleeve 18 ′ also retreats into the lower die body 16, and a predetermined pressure is applied to the pre-molding material 100. As a result, the molded product 110 having a predetermined shape is forged.

  However, in the conventional forging die apparatus 50, the pre-molding material 100 is sandwiched between the hold pin 12 and the sleeve 18 ′, but has a degree of freedom in the horizontal direction, and therefore, in the initial stage of the molding process. As shown by the arrow (see FIG. 4A), the material meat of the front material 100 suddenly bulges outward, the shaft core is displaced, and the molded product 110 is unevenly thinned.

Therefore, Patent Document 1 discloses a material positioning device in forging in which a cushion die placed on a lower mold is provided with a positioning mechanism having a positioning member that is retracted by a punch.
Japanese Utility Model Publication No. 62-72742

  In the positioning device of Patent Document 1 described above, the material is elastically supported from the horizontal direction to position the material, and the positioning device of Patent Document 1 is adopted in the conventional example shown in FIG. The positioning member may be arranged so as to be able to protrude and retract in the horizontal direction from the inner surface of the recess 4 of the lower mold 3 so that the degree of freedom in the horizontal direction of the pre-molding material 100 is eliminated. In order to slide in the horizontal direction orthogonal to the pressing direction of 100, if the pre-molding material 100 is pressed with a large load from the up and down direction, the positioning member can appropriately retreat into the lower mold 3. Therefore, it is expected that the middle part will be bent, and the positioning device of Patent Document 1 cannot be adopted.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a forging die device that prevents uneven thickness deviation of a molded product without uneven flow of raw material when forging. .

In order to solve the above problems, a forging die device of the present invention is disposed in a lower mold so as to be slidable in the vertical direction, and supports a lower surface of a material before molding, and around the support member. And a positioning member that is slidably arranged in the vertical direction and holds the outer peripheral surface of the pre-molding material.
As a result, the pre-molding material can be accurately positioned on the forging die device, and during forging, the pre-molding material is prevented from suddenly expanding in the horizontal direction, and the flow of the material meat is not biased. In this way, a forged product having no quality defects such as lack of thickness and burrs can be obtained.
Various aspects of the forging die device of the present invention and their actions will be described in detail in the following (Aspect of the Invention) section.

(Aspect of the Invention)
In the following, some aspects of the invention that can be claimed in the present application (hereinafter sometimes referred to as “claimable invention”) will be exemplified and described. In addition, each aspect is divided into a term like a claim, it attaches | subjects a number to each term, and is described in the format which quotes another term as needed. This is for the purpose of facilitating the understanding of the claimable invention, and is not intended to limit the combinations of the constituent elements constituting the claimable invention to those described in the following sections. In other words, the claimable invention should be construed in consideration of the description, embodiments, etc. accompanying each section, and as long as the interpretation is followed, there may be embodiments in which other constituent elements are added to the aspects of each section. In addition, an aspect in which the constituent elements are deleted from the aspect of each item can be an aspect of the claimable invention. In the following items, each of (1), (2), and (4) corresponds to each of claims 1 to 3.

(1) A forging die device for forging a material before molding into a predetermined shape by clamping with an upper die and a lower die, and the forging die device is slidable vertically in the lower die. And a support member that supports the lower surface of the pre-molding material, and a positioning member that is slidable in the vertical direction around the support member and holds the outer peripheral surface of the pre-molding material. A forging die device characterized by comprising:
Therefore, in the forging die device of item (1), when the pre-molding material is sandwiched between the upper mold and the lower mold, the pre-molding material is accurately positioned by the positioning member and forging molding is started. Then, the pre-molding material is prevented from suddenly expanding in the horizontal direction by the positioning member, and then the positioning member is pushed down by the bulging portion of the pre-molding material together with the support member, so that the upper mold and the lower mold are molded. The molded product having a predetermined shape is forged by fastening.
As a result, the pre-molding material can be accurately positioned on the forging die device, and the flow of the material meat is not biased during forging. A forged molded product having no defects can be obtained.

(2) The support member is formed in a cylindrical shape having a flange portion projecting outward at a lower end thereof, and an elastic member between a lower end of the positioning member and an upper surface of the flange portion of the support member. Is provided. The forging die device according to item (1), wherein
Therefore, in the forging die device of the item (2), the positioning member is slidable in the vertical direction with respect to the support member by the elastic force of the elastic member.
Accordingly, the sliding form of the support member and the positioning member can be appropriately selected depending on the shape of the molded product, and the raw material before molding can be accurately positioned, and the uneven thickness failure of the molded product can be prevented, such as lack of thickness, burrs, etc. A forged molded product with no quality defects can be obtained.

(3) The cylinder rod from a plurality of cylinders arranged on a fixing base for fixing the lower mold is brought into contact with the lower surface of the flange portion of the support member. Forging mold equipment.
Therefore, in the forging die device of the item (3), the support member is slidable in the vertical direction by driving each cylinder disposed on the fixed base.

(4) The support member is slidably supported in a vertical direction on a fixed base to which the lower mold is fixed, and an elastic member is interposed between the lower end of the positioning member and the fixed base. The forging die device according to item (1), wherein:
Therefore, in the forging die device according to the item (4), the support member is supported by the fixed base so as to be slidable in the vertical direction, while the positioning member is vertically moved by the elastic force of the elastic member interposed between the support member and the fixed base. The support member and the positioning member are independently slidable in the vertical direction.
Accordingly, the sliding form of the support member and the positioning member can be appropriately selected depending on the shape of the molded product, and the raw material before molding can be accurately positioned, and the uneven thickness failure of the molded product can be prevented, such as lack of thickness, burrs, etc. A forged molded product with no quality defects can be obtained.

(5) The forging die according to any one of (2) to (4), wherein the positioning member is formed in a cylindrical shape that slides in the vertical direction on the outer peripheral surface of the support member. apparatus.
Therefore, in the forging die device of item (5), the inner peripheral surface of the cylindrical positioning member can be held in contact with, for example, the entire outer peripheral surface of the columnar pre-molding material, and positioning of the pre-molding material can be performed. In addition, the positioning member can prevent the material before molding from suddenly expanding in the horizontal direction during forging.

(6) The forging die device according to any one of (2) to (5), wherein the elastic member is a coil spring.
Accordingly, the structure of the forging die device of item (6) is simplified.

  ADVANTAGE OF THE INVENTION According to this invention, the forging die apparatus which prevents the uneven thickness defect of a molded product can be provided, without performing the flow of raw material meat during forge molding.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to FIGS. In addition, the same member as a prior art example is demonstrated using the same code | symbol.
The forging die device 1 according to the embodiment of the present invention presses the material 100 before molding of FIG. 5A to forge-mold the molded product 110 of FIG. 5B. As shown in a), an upper mold 2 connected to a press machine (not shown) and reciprocating in the vertical direction, and a lower mold 3 having a recess 4 in which the upper mold 2 is accommodated and fixed to a fixing base 5. And are provided. Below, the structure of the upper mold | type 2 and the lower mold | type 3 is demonstrated in detail.

  As shown in FIG. 1A, the upper die 2 is connected to a press machine and reciprocates in the vertical direction, as in the conventional example described above, and the inner portion of the upper die body 10 The upper punch 11 is integrally inserted so that the lower end of the truncated cone shape projects downward from the lower surface thereof. Further, a hold pin 12 that can be projected and retracted from the flat surface at the lower end thereof and slides in the vertical direction is inserted into the upper punch 11. The lower surface of the hold pin 12 contacts the central portion of the upper surface of the pre-molding material 100.

  As shown in FIG. 1A, the lower mold 3 is fixed to a fixing base 5 constituted by a cylindrical upper fixing base 5a and a lower fixing base 5c via a fixing tool 15 or the like. The lower mold 3 has a cylindrical shape, a lower mold body 16 having a circular shape in top view and having a recess 4 having a predetermined depth, and a truncated cone shape from the bottom surface of the recess 4 inside the lower mold body 16. The lower punch 17 is integrally inserted so that the upper end protrudes upward. The inner peripheral diameter of the recess 4 of the lower mold main body 16 is substantially the same as the outer peripheral diameter of the upper mold main body 10 and is substantially the same as the outer peripheral diameter of the molded product 110. The lower punch 17 has a lower end fixed to the lower stage fixing base 5 c, extends upward in the upper stage fixing base 5 a and the lower mold body 16, and a frustoconical upper end part is the recess 4 of the lower mold body 16. It protrudes upward from the bottom surface. A cylindrical knockout sleeve 18 that slides in the vertical direction is provided on the outer peripheral surface of the lower punch 17 of the lower mold body 16. An annular claw portion 18 a that protrudes outward is provided at the lower end portion of the knockout sleeve 18.

As shown in FIG. 1A, a cylindrical first floating sleeve (support member) 19 is provided on the outer peripheral surface of the knockout sleeve 18 so as to be slidable in the vertical direction. The first floating sleeve 19 is disposed such that the upper end thereof is in contact with the outer peripheral end of the lower surface of the pre-molding material 100. In addition, an annular flange 20 projecting outward is provided around the lower end of the cylindrical first floating sleeve 19. The upper surface of the cylinder rod 22 from a plurality of cylinders 21 arranged at predetermined intervals in the circumferential direction is brought into contact with the lower surface of the annular flange 20 of the first floating sleeve 19 at a predetermined interval in the circumferential direction.
The first floating sleeve 19 is slidable in the vertical direction on the outer peripheral surface of the knockout sleeve 18 by driving each cylinder 21.

A cylindrical second floating sleeve (positioning member) 25 is provided on the outer peripheral surface of the first floating sleeve 19 so as to be slidable in the vertical direction. Between the lower end of the second floating sleeve 25 and the upper surface of the annular flange 20 provided at the lower end of the first floating sleeve 19, a plurality of coil springs (with a predetermined spacing in the circumferential direction) (Elastic member) 26 is interposed.
The second floating sleeve 25 is slidable in the vertical direction with respect to the first floating sleeve 19 on the outer peripheral surface of the first floating sleeve 19 by the elastic force of each coil spring 26.

In addition, regarding the height relationship between the first and second floating sleeves 19 and 25, as shown in FIG. 1A, the second relationship immediately before molding is possible regardless of the shape of the molded products 110, 120, and 130. The upper end of the floating sleeve 25 protrudes above the upper end of the first floating sleeve 19, and the upper end of the first floating sleeve 19 supports the outer peripheral end of the lower surface of the pre-molding material 100, and the second The inner peripheral surface of the upper end portion of the floating sleeve 25 is in contact with and held by the outer peripheral surface of the lower end portion of the pre-molding material 100, thereby positioning the pre-molding material 100 accurately.
Further, during the molding, depending on the shape of the molded product 110, the coil springs 26 are all compressed as shown in FIG. 1B if the shape of the molded product 110 shown in FIG. At this stage, the upper end of the second floating sleeve 25 is flush with the upper end of the first floating sleeve 19, and immediately after molding, as shown in FIG. 1 (d), the first and second floating sleeves The upper ends of 19 and 25 are the same height as the bottom surface of the recess 4 of the lower mold body 16 and the upper end of the knockout sleeve 18.

  As shown in FIG. 1 (a), the inner wall surface of the upper fixing base 5a of the fixing base 5 has a predetermined recess 5d in which the annular claw 18a provided at the lower end of the knockout sleeve 18 slides in the vertical direction. It is provided at a height. The upper surfaces of a plurality of sliding pins 30 that are inserted through the lower fixing base 5c and slidable in the vertical direction are in contact with the lower surface of the annular claw portion 18a of the knockout sleeve 18. The knockout sleeve 18 is slidable in the vertical direction by driving the sliding pins 30. The knockout sleeve 18 is set so that the upper end of the knockout sleeve 18 is flush with the bottom surface of the recess 4 of the lower die body 16 when the molded product 110 having the shape shown in FIG. The Further, the knockout sleeve 18 does not slide in the vertical direction in the middle of forging, but slides in the vertical direction when the molded product 110 is taken out after the molded product 110 is forged.

Next, a molding process for forging the molded product 110 shown in FIG. 5 (b) by the forging die device 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 (a) to 1 (d).
First, as shown in FIG. 1A, the hold pin 12 protrudes downward from the lower surface of the upper punch 11 of the upper mold 2, and the first and second floating sleeves 19 and 25 are recessed in the lower mold body 16. 4 is protruded upward from the bottom surface of 4 and is held by the hold pin 12 and the first and second floating sleeves 19 and 25 in a state where the columnar pre-molding material 100 is erected.
That is, the lower surface of the hold pin 12 is brought into contact with the central portion of the upper surface of the pre-molding material 100, and the upper end of the first floating sleeve 19 is brought into contact with and supported by the outer peripheral end of the lower surface of the pre-molding material 100, The inner peripheral surface of the upper end portion of the second floating sleeve 25 is held in contact with the outer peripheral surface of the lower end portion of the pre-molding material 100 to position the pre-molding material 100.

Next, as shown in FIG. 1B, when the lowering of the upper mold 2 is started, the pre-molding material 100 is gradually pressurized, and the hold pin 12 is retracted into the upper punch 11 of the upper mold 2. In addition, the outer peripheral surface of the pre-molding material 100 gradually bulges while being restricted from suddenly bulging in the horizontal direction by the second floating sleeve 25. Thereafter, only the second floating sleeve 25 descends against the elastic force of each coil spring 26 by this bulging portion, and the upper end of the second floating sleeve 25 is flush with the upper end of the first floating sleeve 19. become.
Up to this stage, the first floating sleeve 19 has not yet started to descend, and each cylinder 21 that slidably supports the first floating sleeve 19 is a cylindrical pre-molding material. The pressure is set to a high pressure that does not allow the cylinder rod 22 to retract until 100 is formed into a barrel shape by the initial pressurization and all the coil springs 26 are compressed by the bulging portion.

Next, as shown in FIG. 1C, when the upper mold 2 is further lowered, the pre-molding material 100 is further pressurized, and the barrel-shaped pre-molding material 100 becomes the first and second floating sleeves 19. , 25 are both pushed down against the cylinder pressure, and as shown in FIG. 1 (d), the upper die 2 is further lowered into the recess 4 of the lower die body 16, and the first and second floating sleeves 19, When 25 reaches the bottom dead center, the upper ends of the first and second floating sleeves 19, 25 are flush with the bottom surface of the recess 4 of the lower mold body 16 and the upper end of the knockout sleeve 18. A molded product 110 having a predetermined shape is forged in the cavity between the lower die 3 and the lower die 3.
Thereafter, when the upper die 2 is raised and each sliding pin 30 is driven, the knockout sleeve 18 rises and the molded product 110 is taken out.

According to the forging die device 1 according to the embodiment of the present invention described above, immediately before forging is started, the inner peripheral surface of the upper end portion of the second floating sleeve 25 is the lower end portion of the material 100 before forming. Since the pre-molding material 100 is held in contact with the outer peripheral surface, the pre-molding material 100 is accurately positioned. Further, in the initial process when forging is started, the second floating sleeve 25 can prevent the pre-molding material 100 from suddenly expanding in the horizontal direction. Only the second floating sleeve 25 is pushed down against the elastic force of each coil spring 26 by the protruding portion. Further, when the upper die 2 is lowered to the bottom dead center of the first and second floating sleeves 19, 25, the upper ends of the first and second floating sleeves 19, 25 are formed in the recess 4 of the lower die body 16. A molded product 110 having a predetermined shape is forged in the cavity between the upper die 2 and the lower die 3 and is flush with the bottom surface and the upper end of the knockout sleeve 18.
As a result, since the raw material 100 is prevented from suddenly bulging in the horizontal direction in the initial stage of the molding process as in the prior art, the flow of the raw material meat is not biased. Can be prevented.

Note that the forging die device 1 according to the embodiment of the present invention has a disk shape as shown in FIG. 2 in addition to the molded product 110 shown in FIG. This is also effective when forging a molded product 120 having a conical recess 121, 121 and having an annular projecting portion 122 projecting downward from the outer peripheral end portion of the lower surface thereof.
That is, when forging the molded product 120 from the material 100 before molding, the forging die device 1 is configured so that the upper end of the knockout sleeve 18 is higher than the bottom surface of the recess 4 of the lower mold body 16 as shown in FIG. When the coil springs 26 are all compressed and the first and second floating sleeves 19 and 25 reach bottom dead center, the upper end of the second floating sleeve 25 is The lower end of the floating sleeve 19 is lower than the upper end of the lower mold body 16 so that it is flush with the bottom surface of the recess 4, and the upper end of the first floating sleeve 19 is flush with the upper end of the knockout sleeve 18. The length of the second floating sleeve 25 is set to be shorter than the length of the first floating sleeve 19 and the coil spring 26 is extended. And length, etc. may be appropriately set at the time of compression.
Of course, even when forging the molded product 120, immediately before the molding, the upper end of the second floating sleeve 25 protrudes upward from the upper end of the first floating sleeve 19, and the upper end of the second floating sleeve 25. The inner peripheral surface of the portion abuts and holds the outer peripheral surface of the lower end portion of the pre-molding material 100 to accurately position the pre-molding material 100.

  Next, as shown in FIG. 3 (b), it has a disk shape and has frustoconical concave portions 131 and 131 at the central portion of the upper surface and the lower surface, and the peripheral portion of the concave portion 131 provided on the lower surface thereof. In addition, when forging a molded product 130 having a shape having an annular projecting portion 132 projecting downward, a forging die device 1a according to another embodiment of the present invention shown in FIG. 3 is used. It will be. In the description of the forging die device 1a according to the other embodiment, differences from the forging die device 1 shown in FIGS. 1 and 2 described above will be mainly described.

In the forging die device 1a according to another embodiment shown in FIG. 3, in the lower die 3, a first floating sleeve 19 is provided on the outer peripheral surface of the knockout sleeve 18 so as to be slidable in the vertical direction. The first floating sleeve 19 is in contact with the upper surface of the cylinder rod 22 from a plurality of cylinders 21 arranged at predetermined intervals in the circumferential direction at the lower end of the first floating sleeve 19 so as to drive each cylinder 21. As a result, the outer peripheral surface of the knockout sleeve 18 can be slid in the vertical direction.
A second floating sleeve 25 is provided on the outer peripheral surface of the first floating sleeve 19 so as to be slidable in the vertical direction. The second floating sleeve 25 is provided with a plurality of coil springs 26 arranged at predetermined intervals in the circumferential direction between the lower end thereof and the upper surface of the upper stage fixing base 5a. The outer peripheral surface of the first floating sleeve 19 is slidable in the vertical direction by force.
Further, the knockout sleeve 18 is set so that the upper end thereof is lower than the bottom surface of the recess 4 of the lower mold body 16.
The fixed base 5 includes an upper fixed base 5a, a middle fixed base 5b, and a lower fixed base 5c. The lower end of the lower punch 17 is fixed to the lower fixed base 5c, and the inner wall surface of the middle fixed base 5b. The annular claw portion 18a provided at the lower end portion of the knockout sleeve 18 is provided with a concave portion 5d that slides in the vertical direction. The upper surfaces of a plurality of sliding pins 30 that are inserted through the lower fixing base 5c and are slidable in the vertical direction are in contact with the lower surface of the annular claw portion 18a of the knockout sleeve 18.

Then, in the forging die device 1a according to another embodiment shown in FIG. 3, first, as shown in FIG. 3 (a), immediately before the molding, the upper end of the second floating sleeve 25 is the first floating. Projecting upward from the upper end of the sleeve 19, the inner peripheral surface of the upper end portion of the second floating sleeve 25 is in contact with and held by the outer peripheral surface of the lower end portion of the pre-molding material 100 to position the pre-molding material 100.
Thereafter, pressurization to the pre-molding material 100 is started, and as shown in FIG. 3B, all the coil springs 26 are all compressed, and the first and second floating sleeves 19 and 25 reach the bottom dead center. The upper end of the second floating sleeve 25 protrudes upward from the upper end of the first floating sleeve 19 and is flush with the bottom surface of the recess 4 of the lower mold body 16, and the upper end of the first floating sleeve 19 is At the same height as the upper end of the knockout sleeve 18, the molded product 130 is forged.

  That is, in the forging die device 1a according to another embodiment shown in FIG. 3, each cylinder 21 that slides the first floating sleeve 19 in the vertical direction and the second floating sleeve 25 that slides in the vertical direction. Since both the coil springs 26 are disposed on the upper fixed base 5a of the fixed base 5, the first and second floating sleeves 19 and 25 slide in the vertical direction in an independent state. This is the form in which the second floating sleeve 25 of the forging die device 1 shown in FIGS. 1 and 2 slides up and down with respect to the first floating sleeve 19 by the elastic force of each coil spring 26. It is a different point.

FIG. 1 shows a forging die device according to an embodiment of the present invention, and (a) to (d) are diagrams showing a molding process of a molded product. FIG. 2 is a diagram showing a form in which a molded product different from the molded product of FIG. 1 is forged by the forging die device according to the embodiment of the present invention. FIG. 3 shows a forging die device according to another embodiment of the present invention, and (a) to (b) are diagrams showing a molding process of a molded product. FIG. 4 shows a conventional forging die apparatus, and (a) to (b) are diagrams showing a molding process of a molded product. Fig.5 (a) shows the raw material before shaping | molding, (b) is a figure which shows the molded article after forge molding.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a Forging die apparatus, 2 Upper mold | type, 3 Lower mold | type, 5 Fixing stand, 19 1st floating sleeve (support member), 20 Annular collar part, 25 2nd floating sleeve (positioning member), 26 Coil spring (Elastic member), 100 material before molding, 110, 120, 130 molded product

Claims (3)

It is a forging die device for forging a pre-molding material into a predetermined shape by clamping with an upper die and a lower die,
The forging die device is disposed in the lower die so as to be slidable in the vertical direction, and supports a lower surface of the material before molding,
A forging die apparatus, comprising: a positioning member that is slidable in a vertical direction around the support member and holds an outer peripheral surface of the material before molding.   The support member is formed in a cylindrical shape having a flange portion projecting outward at a lower end thereof, and an elastic member is interposed between the lower end of the positioning member and the upper surface of the flange portion of the support member. The forging die device according to claim 1, wherein The support member is slidably supported in a vertical direction on a fixed base to which the lower mold is fixed, and an elastic member is interposed between the lower end of the positioning member and the fixed base. The forging die device according to claim 1, wherein

Images