JPH08117880A - Press device - Google Patents

Abstract

PURPOSE: To enable one process machining by clamping a plate like base stock with an upper die and a lower die, executing a primary pressing with a force smaller than the force by which an elastic member is compressed and executing a secondary pressing by compressing the elastic member with further larger force. CONSTITUTION: A plate like base stock 14 is set between an upper die 13 and a lower die 11, a ram is lowered and the plate like base stock 14 is clamped with an upper pad 29 together with a lower pad 18. When the upper die 13 is lowered further, the lower pad 18 is pressed with the upper pad 29, the plate like base stock 14 is drawn with a punch 16a and a die 29a and a rib is formed. A spring unit 12 is formed to have a bending part by a cutting blade 21 and the upper pad 29 without being compressed. When the lower pad 18 is brought into contact with a lower die body 16 and it is not able to be lowered, a disc spring is begun to be deformed, shapes the outer shape by having a needless part cut by cutting blades 20, 21, 30, 31, and is drilled by a drilling punch. In such a way, plural numbers of machining can be executed precisely and continuously in one process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press device, and more particularly, to dividing an upper die into an upper die body and an upper pad, and for forming the upper pad on the upper die body by a spring unit having a very large spring constant. After the plate-shaped material is subjected to the primary processing with a force smaller than the force required to compress the spring unit, the spring unit is compressed to perform the secondary processing. Processing time and processing cost can be increased by making it possible to perform multiple processes such as drawing, bending, edge bending, and drilling at the same time with one stroke of the press machine, which has been divided into multiple processes and processed sequentially. The present invention relates to an epoch-making press device that can significantly reduce

[0002]

2. Description of the Related Art In the processing of a metal plate, the metal plate is pressed by a die to perform drawing, bending, edging, and drilling, but these processes cannot be performed at the same time. This is done in sequence while preparing a special mold for bending and drilling and changing the mold.

In particular, drawing and bending are carried out while pulling in a plate-shaped material. Therefore, when this drawing and bending are carried out after the hole-forming, the shape of the hole is elliptical due to the drawing-in of the plate-shaped material. In addition, since the dimensional accuracy between the cores of the holes is deviated, it is necessary to perform the drilling process in the final step after the drawing and bending processes are performed and the product shape is completed.

Therefore, it is necessary to prepare a dedicated die for drilling and to provide one drilling process, which complicates the manufacturing process and increases the manufacturing cost.

For example, in FIGS. 20 to 22, the plate-shaped metal 1 is first processed by drawing in the first stage to form a roughly shaped product 2 (FIG. 20), and then the roughly shaped product 2 is processed. Move it to the next die, add the second step of finer drawing and bending to make intermediate product 3 that is a shape close to the product shape (Fig. 21), and then move it to the hole making die. The hole 4a was processed to obtain the product 4.

As described above, in the press working, generally, the rough drawing work, the detail working and the drilling work must be independently performed by using respective dedicated molds. Especially, the drilling work is the final step of the press working. If this is not done, deformation of the hole shape and pitch deviation will occur, so it could not be done at the same time as other processing.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in order to eliminate the above-mentioned drawbacks of the prior art, and its purpose is to provide either the upper die or the lower die of the pressing device. The mold is divided into a main body and a pad, and the main body and the pad are connected to each other via an elastic member having a very large spring constant so as to be relatively movable. After performing the primary processing on the plate-shaped material with a force smaller than the force, subsequently applying a larger force to compress the elastic member to perform the secondary processing on the plate-shaped material, the primary processing for drawing and bending is performed. This is to eliminate the deformation of the hole shape and increase the dimensional accuracy between the cores of the holes by making it possible to continuously perform the drilling as the secondary processing after the completion of the product shape by the processing.

Another object of the present invention is to provide a spring unit, in which a plurality of disc springs are mounted in a housing so as to overlap each other, so that a spring having an extremely large spring constant capable of withstanding a large force required for pressing a large product. This is to enable the unit to be manufactured as a small-sized device, and the spring is large in size, which makes it difficult to connect the upper mold body and the upper pad to each other. The primary processing of a large product requiring a large processing force can be performed without compressing the spring unit.

Still another object is to divide the upper mold into an upper mold body having a punching punch and an upper pad having a die for drawing and to divide the upper mold body into two parts. By connecting the pad and the pad via an elastic member that has a large spring constant that is compressed only when a force greater than that required for drawing is applied, a force smaller than the force required to compress the elastic member is used. After the plate-shaped material is drawn, the elastic member is compressed by applying a larger force, and the upper pad is moved relative to the upper die body to perform the drilling process. That is, the drawing process and the drilling process can be performed in one step, thereby significantly shortening the processing time.

Another object is to divide the upper mold into an upper mold body having a punching punch and an upper pad having a coining die formed thereon, and to perform coining for the upper mold body and the upper pad. Coining the plate-shaped material with a force smaller than the force required to compress the elastic member by connecting via an elastic member having a large spring constant that is compressed only when a force greater than After processing, further elastic force is applied to compress the elastic member, and the upper pad is moved relative to the upper mold body to perform the drilling, thereby performing a plurality of coining and drilling processes. Can be performed simultaneously with one stroke of the press machine, which greatly reduces the processing time and processing cost, eliminates the deformation of the hole shape, and improves the centering of the hole. It is to increase the.

Still another object is to divide the upper die into an upper die body having a punching punch and an upper pad having a die for edge bending, and to construct the upper die body and the upper pad. By connecting and via an elastic member having a large spring constant that is compressed only when a force larger than that required for edge bending is applied, a force smaller than the force required to compress the elastic member is used. After performing edge bending on the plate-shaped material, further elastic force is applied to compress the elastic member, and the upper pad is moved relative to the upper die body to perform hole forming, thereby performing edge bending. And that the boring process can be continuously performed in one stroke.

[0012]

SUMMARY OF THE INVENTION In summary, the present invention (Claim 1) is a press device for plastically deforming by pressing a plate-shaped material to perform a forming process, and an upper mold having a surface formed into a product shape, A lower die having a surface formed in the same shape corresponding to the shape of the upper die and sandwiching the plate-shaped material with the upper die to perform a forming process, and a force larger than the force required for the primary processing of the plate-shaped material. An elastic member having a large spring constant such that it is compressed only when is actuated, and one of the upper die and the lower die is divided into a main body and a pad, and the main body and the pad are opposed to each other. After being movably connected through the elastic member, primary processing is performed with a force smaller than the force required to hold the plate-shaped material between the upper die and the lower die and compress the elastic member, and Apply a large force to compress the elastic member It is characterized in that constructed in a plate-shaped material to perform a secondary processing.

Further, according to the present invention (claim 2), in a press device for plastically deforming by pressing a plate-shaped material to perform a forming process, a surface is formed into a product shape and divided into an upper mold body and an upper pad. An upper mold having the same shape as that of the upper mold, a lower mold having a surface formed to have the same shape corresponding to the upper mold, and sandwiching the plate-shaped material between the upper mold and the lower mold to perform a molding process. A disc spring and a spring unit having a large spring constant such that the disc spring is deformed and compressed only when a force larger than the force required for the primary processing of the plate-shaped material is applied to the disc spring. The upper die body and the upper pad of the upper die are movably connected to each other via the spring unit, and the plate material is sandwiched between the upper die and the lower die to compress the spring unit. Primary processing with less force than required After, it is characterized in that the further compressing the spring unit by applying a large force is configured to perform secondary processing on the plate material.

Further, according to the present invention (claim 3), in a press device for plastically deforming by pressing a plate-shaped material to perform a forming process, a punch for drawing the plate-shaped material and a punching process for the plate-shaped material. In cooperation with the lower die in which the punching die is formed, an elastic member having a large spring constant that is compressed only when a force larger than the force required for drawing the plate-like material acts, and the punching die. An upper die body provided with a punching punch for making a hole in the plate-like material and a relatively movable member connected to the upper die body through the elastic member to draw the plate-like material in cooperation with the punch. An upper pad having a die formed thereon and an upper die formed by dividing the upper pad into two dies, and the plate member is sandwiched between the die of the upper pad and the punch of the lower die to compress the elastic member. Than the power required After the plate-shaped material is drawn with a small force, a larger force is applied to compress the elastic member to move the upper pad relative to the upper die main body and thereby the plate-shaped material. It is characterized in that the plate-shaped raw material is perforated and the plate-shaped material is drawn and perforated in one step.

According to the present invention (claim 4), in a press device for plastically deforming a plate-shaped material by pressing to perform a forming process, a coining punch for coining the plate-shaped material and a drilling process for the plate-shaped material. A lower die having a punching die formed thereon, an elastic member having a large spring constant that is compressed only when a force greater than that required for coining the plate-shaped material is applied, and the punching die cooperates with the punching die. And an upper die body in which a punching punch for punching the plate-like material is disposed, and the upper die body is relatively movably connected to the upper die body through the elastic member, and the plate-like material is coined in cooperation with the coining punch. An upper pad having a coining die to be processed and an upper die divided into two parts; and the coining punch and the coining die Was subjected to coining in the plate-shaped material with a small force than the force required to compress the sexual member,
A larger force is applied to compress the elastic member to move the upper pad relative to the upper die body to perform a drilling process on the plate-shaped material and coining and drilling the plate-shaped material. Is configured to be performed in one step.

According to the present invention (claim 5), in a press device for plastically deforming a plate-shaped material by pressing it to perform a forming process, a punch for edge-bending the plate-shaped material and a hole for punching the edge part. A lower mold with a die formed,
An elastic member having a large spring constant that is compressed only when a force larger than that required for edge bending of the plate-shaped material is applied, and a hole for drilling the plate-shaped material in cooperation with the hole-forming die. An upper mold body in which a punch is disposed, and an upper pad formed with a die for performing relative bending of the plate-shaped material in cooperation with the upper mold body so as to be relatively movable via the elastic member. And an upper die configured by being divided into two parts. The plate-shaped material is edge-bent with a force smaller than the force required for compressing the elastic member by the punch and the die, and then further increased. A force is applied to compress the elastic member and move the upper pad relative to the upper mold body to perform a hole forming process on the plate-shaped material to perform edge bending processing and hole forming processing on the plate-shaped material. 1
It is characterized in that it is configured to be performed in a process.

[0017]

In the pressing apparatus of the present invention, the upper die is divided into an upper die body and an upper pad, and the upper die body and the upper pad are applied with a force larger than that required for the primary processing of the plate-shaped material. Since the structure is such that the elastic member having a large spring constant that is compressed only when it is actuated is connected, the plate-shaped material is first processed with a relatively small force without compressing the elastic member. Further, the secondary processing can be performed by applying a larger force, and the primary processing and the secondary processing can be performed continuously and in one step of the press machine.

More specifically, since the plate-shaped material is subjected to primary processing such as drawing and bending to complete the product shape, it is possible to perform punching processing. The hole shape collapses into an elliptical shape due to the drawing of the blank-shaped material, and the holes can be manufactured with high accuracy without interchanging the center distance of the holes, and multiple processing can be performed in one continuous process, reducing the processing time. It is possible to significantly reduce the processing cost by reducing it from 20% to 30%, and it is possible to reduce the equipment cost by about 14% by eliminating the preparation of a dedicated mold for each process.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. First, referring to FIG. 1 to FIG. 4, a first embodiment of the present invention will be described.
1, a spring unit 12 as an example of an elastic member, and an upper mold 1
3 is provided.

Pressed product 15 produced in the first embodiment
1 is a back plate used in a cab of, for example, a cab-over engine type vehicle and has a length of 1600 m.
m, width 780 mm, and made of a steel plate 0.8 mm in thickness. Ribs 15a are entirely drawn by drawing to increase the second moment of area, and bent portions 15b are formed at the ends. It is formed by bending and has a shape in which a hole 15c for attachment is processed.

The lower die 11 is for working together with the upper die 13 to sandwich the plate-shaped material 14 which is a work, and plastically deform it to produce a pressed product 15. In FIG. Lower mold body 1 fixed to a press machine (not shown)
6 and a lower pad 18 that is vertically movable with respect to the lower mold body 16.

A punch 16a having the same shape as the press product 15 is formed on the surface of the lower die body 16.

The lower pad 18 is disposed so as to be slidable in the direction of arrow A or B by about 20 mm with respect to the lower die body 16, and is held at the same height as the punch 16a by a floating spring 19, It is configured such that the plate-shaped material 14 is processed while being clamped during processing and acts as a wrinkle retainer.

The lower pad 18 includes hardened steel, high speed steel,
Alternatively, cutting blades 20 and 21 manufactured by using a cemented carbide chip or the like are provided, and the cutting blade 20 is provided with a drilling die 20a. The pressed product 15 is completed by cutting unnecessary portions of the blank 14.

The spring unit 12 is an elastic member having a large spring constant so that it is compressed only when a force larger than that required for processing such as drawing and bending is applied. In FIG. 2 and FIG. For example, a plurality of disc springs 23, which are made of spring steel having a diameter of 90 mm and are hardened, are mounted in an iron housing 22 having a diameter of 105 mm and a length of 170 mm, for example, by stacking 28 disc springs. An upper lid 24 provided with a 10 mm screw 24a for mounting is screwed and fixed to the upper end,
A lower lid 25 provided with a fitting hole 25a having a diameter of 58 mm is screwed and fixed to the lower end.

A spring receiver 26 provided with a 12 mm screw 26a for mounting is provided in the fitting hole 25a so as to be slidably fitted in the direction of arrow C or D, and the upper lid 24 and the spring receiver 26 are connected to each other. When a large force acts between them, the disc spring 23 is deformed so that the spring receiver 26 can move in the direction of the arrow C. The spring constant or spring strength of the spring receiver 26 is 25 when the cab back plate is mounted. The spring constant is set to a large spring constant such that it cannot be compressed by a force of 5 to 8 tons so that it is not compressed by a force of about 200 tons required for drawing the pressed product 15.

The upper mold 13 cooperates with the lower mold 11 to sandwich a plate-shaped material 14 which is a work and plastically deform it to manufacture a press product 15. In FIG. It is fixed to a ram (not shown) and configured to be movable in the vertical direction together with the ram, and is divided into an upper mold body 28 and an upper pad 29, and the upper mold body 28, the upper lid 24, and the upper pad 29 are separated. The spring receiver 26 and the spring receiver 26 are fixed by screws (not shown), and the upper pad 29 is the upper mold body 2
A spring unit 12 is connected to 8 so as to be vertically movable about 8 mm.

The upper die main body 28 has a cutting edge 2 of the lower pad 18.
Opposite to 0 and 21, cutting blades 30 and 31 made of hardened steel or the like are provided in the same manner as described above.
It is configured to cut unnecessary portions of the plate-shaped material 14 in cooperation with.

Further, the upper die main body 28 has a punching die 20a.
The punching punch 32 is fixed so as to face with the punching die 20a, and the hole 15c is punched in the plate-shaped material 14 in cooperation with the punching die 20a.

The upper pad 29 is formed with a die 29a formed in the same shape having a size larger than the punch 16a by the thickness of the plate-shaped material 14, and is plastically deformed by sandwiching the plate-shaped material 14 together with the punch 16a. It is configured to be drawn.

Then, the upper die 13 is lowered in the direction of arrow E to sandwich the plate-shaped material 14 between the punch 16a and the die 29a,
After performing the drawing process without compressing the spring unit 12, while applying a larger force to compress the spring unit 12, the cutting blades 20, 21 and the cutting blades 30, 31 remove unnecessary portions of the plate-shaped material 14. After cutting, a hole is formed by the hole forming die 20a and the hole forming punch 32, and continuous 1
It is configured to perform drawing, cutting and drilling in the process.

Next, referring to FIGS. 7 to 13, the second embodiment of the present invention will be described. The manufactured press product is the oil pan 35 used in the vehicle transmission shown in FIG. Press machine 34
Is a semi-finished product 36 that has been drawn by a press machine in the previous process, and has a punching portion 35a and a hole 35b formed by coining.
The bent portion 35c is processed into a finished product of the oil pan 35, and includes a lower mold 38, a spring unit 39 as an example of an elastic member, and an upper mold 40.

The lower die 38 cooperates with the upper die 40 to clamp the semifinished product 36 of the oil pan, which is a work, and plastically deform it to produce the oil pan 35. In the above, it is composed of a lower mold body 41 fixed to a press machine (not shown) and a lower pad 42 arranged to be vertically movable with respect to the lower mold body 41.

The lower pad 42 slidably moves about 10 mm in the vertical direction with respect to the lower mold body 41.
Held by 3.

The lower pad 42 is provided with a coining punch 42a made of hardened steel or the like at a predetermined portion, and the coining punch 42a is provided with a punching die 42b for coining the semi-finished product 36. At the same time, a drilling process is performed to complete the oil pan 35.

The spring unit 39 has a spring constant large enough to be compressed only when a force larger than the force required for coining (about 250 tons in the second embodiment for coining the oil pan 35) is applied. And an elastic member having a spring constant such that the initial deformation force of a built-in disc spring (not shown) is set to be larger than the force required for coining, as described in the first embodiment. Since they have the same structure, detailed description thereof will be omitted.

The upper mold 40 cooperates with the lower mold 38 to plastically deform the semifinished product 36 of the oil pan to manufacture the oil pan 35. In FIG. 8, the ram (not shown) of the press machine is used. The upper die body 44 and the spring unit 3 are divided into an upper die body 44 and an upper pad 46.
9 upper lid (not shown) and upper pad 46 and unit 39
Of the spring unit (not shown) are fixed by screws (not shown), and the upper pad 46 is connected to the upper mold body 44 via the spring unit 39.
Is compressed so that it can move up and down by about 5 mm.

On the upper mold body 44, a product retainer 48 is provided with a spring 4
9 and the pin 50 are arranged so as to be able to move up and down by 30 mm, and when the semifinished product 36 of the oil pan placed on the lower mold 38 is coined, it is pressed and fixed by the spring force of the spring 49. ing.

Further, the upper die body 44 is provided with a punching die 42b.
A hole punching punch 51 is fixed so as to oppose to, and the hole 35c is formed in the oil pan 35 in cooperation with the hole punching die 42b.

The upper pad 46 has a coining punch 42.
A coining die 46a having the same shape and having a size larger than the thickness of the oil pan 35 by the thickness of the oil pan 35 is formed, and the semifinished product 36 of the oil pan is sandwiched together with the coining punch 42a to perform coining processing to form a punched portion 35a. Is configured to.

Then, the upper die 44 is lowered in the direction of the arrow G, the semi-finished product 36 of the oil pan is pressed by the coining punch 42a and the coining die 46a to perform coining processing, and then a larger force is applied to the spring unit. While compressing 39, the hole 35c is processed by the hole forming die 42b and the hole forming punch 51.

Next, the third embodiment of the present invention will be described with reference to FIGS. 14 to 19. The manufactured press product is the sheet metal cover 55 shown in FIG. 14, which is drawn by the press machine in the previous step. Semi-finished product 5
6, the bending portion 55a and the hole 55b are formed by bending to make a finished product of the cover 55. The lower die 58 and a spring unit 59 as an example of an elastic member.
And an upper mold 60.

The lower die 58 cooperates with the upper die 60 to clamp the semi-finished product 56 of the cover 55, which is a work, and plastically deform it to manufacture the cover 55. In FIG. The surface is formed in the same shape as the cover 55, a punch 58a is formed, and is fixed to a press machine (not shown).

The lower die 58 is made of die steel and hardened. A punch 58a is provided with a punching die 58b at a predetermined position. The punch 58a is bent and punched. The cover 55 is completed.

The spring unit 59 is an elastic member having a spring constant large enough to be compressed only when a force larger than the force required for bending the cover 55 (about 200 tons in the third embodiment) is applied. The structure is the same as that described in the first embodiment, except that the initial deformation force of the built-in disc spring (not shown) is set to be larger than the force required for bending. Therefore, detailed description thereof will be omitted.

The upper die 60 cooperates with the lower die 58 to plastically deform the semi-finished product 56 of the cover to produce the cover 55. In FIG. 15, the ram (not shown) of the press machine is used. The upper mold body 61 and the spring unit 59 have an upper lid (not shown). The upper mold body 61 and the upper pad 62 are divided into two parts. The upper pad 62 and a spring receiver (not shown) of the spring unit 59 are fixed by screws (not shown), and the upper pad 62 is connected to the upper mold body 61 via the spring unit 59. When the spring unit 59 is compressed, it is relatively movable up and down by about 8 mm.

A cushion 63 is fixed to the upper end of the upper pad 62 so as to come into contact with the upper mold body 61 when the spring unit 59 is compressed and the upper mold body 61 approaches the upper pad 62.

Further, the upper die body 61 has a hole forming die 58b.
A plurality of punches 64 each having a circular cross section and an irregular shape facing each other.
Is fixed, and the hole 55b is formed in the cover 55 in cooperation with the hole forming die 58b.

The upper pad 62 has a cover 5 from the lower mold 58.
Die 62 of the same shape having a size larger by the thickness of 5
a is formed, and the semi-finished product 56 is sandwiched together with the punch 58a and is bent.

Then, the upper die 61 is lowered in the direction of the arrow J, the punch 58a and the die 62a are pressed against the semi-finished product 56 to bend it to a predetermined portion, and then a larger force is applied to the spring unit 59. While lowering the upper die body 61 in the direction of arrow J while compressing in the direction of arrow K,
Various holes 55b are formed by 8b and the punch 64.

The present invention is configured as described above,
The operation will be described below. First, the operation of the first embodiment of the present invention will be described. Referring to FIG.
Is in the raised position, the plate-shaped material 14 is set between the upper mold 13 and the lower mold 11, and then the press machine is operated to lower the ram (not shown) in the direction of arrow E, and eventually the upper mold is lifted. The pad 29 comes into contact with the plate-shaped material 14 to sandwich the plate-shaped material 14 between the upper pad 29 and the lower pad 18.

When the upper die 13 further descends in the direction of arrow E,
In FIG. 5, the lower pad 18 is pressed by the upper pad 29, and is lowered in the direction of arrow A while holding the plate-shaped material 14 while compressing the floating spring 19 and the plate-shaped material 1
4, ribs 15a are formed by drawing with punch 16a and die 29a.

At this time, the initial deformation strength of the spring unit 12 is 20 larger than the force required for drawing the plate-shaped material 14.
Since it is set to about 0 tons, the spring unit 12
Is drawn without being compressed, and the cutting edge 21
The upper pad 29 bends the plate-shaped material 14 to form a bent portion 15b.

Lower pad 1 pressed by upper pad 29
When 8 descends by 20 mm, the lower pad 18 moves the lower mold body 1
6, the upper die 13 continues to descend in the direction of arrow E, but the upper pad 29 abuts the lower pad 18 through the plate-shaped material 14 to prevent the lowering. To be done.

When a force of about 200 tons is applied to the upper die body 28, the disc spring 23 starts to deform, so that only the upper die body 28 moves the disc spring 23 of the spring unit 12 by about 6 m.
The cutting blades 20 and 21 move downward while compressing m respectively.
In addition to cutting the unnecessary portion of the plate-shaped material 14 in cooperation with 0 and 31, the outer shape is adjusted, and the punching punch 32 projects from the upper pad 29 and cooperates with the punching die 20a to drill a hole 15c for mounting. I do.

Then, when the upper die 13 further descends by 2 mm and reaches the bottom dead center, the upper die body 28 contacts the upper pad 29 via the cushion 32, and the upper die 13 and the lower die 11 almost complete the molding. The plate-shaped material 14 thus formed is firmly sandwiched to adjust the shape, and the pressing operation is completed.

Next, the operation of the second embodiment of the present invention will be described. In FIG. 8, when the upper die 40 is in the raised position, the semi-finished product 36 drawn by the pressing machine in the previous step is drawn. After setting between the upper mold 40 and the lower mold 38, the press machine is operated to move a ram (not shown) with an arrow G.
Lower in the direction.

Then, in FIG. 10, the product presser 48 contacts the semi-finished product 36 placed on the lower mold 38, and further the spring 49.
While compressing, it descends to the semi-finished product 36 by the spring force of the spring 49.
The coining punch 42a and the coining die 46a are separated from each other in FIG.
The end of the semi-finished product 36 is placed on the 2a.

When the upper die 40 further descends in the direction of arrow G,
In FIGS. 10 and 11, the lower pad 42 is pressed by the upper pad 46 and moves downward while compressing the floating spring 43, and the lower die main body 41 and the coining punch 42a bend the bent portion 35c around the entire circumference of the semi-finished product 36. When the lower pad 42 is further lowered by 10 mm, the lower pad 42 comes into contact with the lower die body 41 to stop, and the coining punch 42a and the coining die 4
The semi-finished product 36 is sandwiched with 6a and coining is performed to form the embossed portion 35a.

The force required for the bending and coining process is about 200 tons, which is smaller than the initial deformation force of the spring unit 39 set to 250 tons, so that the spring unit 39 is compressed. Bending and coining are performed without any need.

When the processing is further advanced, only the upper die main body 44 is lowered in the direction of arrow I while compressing the disc spring (not shown) of the spring unit 39 in the direction of arrow H by 3 mm, and the punch 51 is moved to the upper pad 46. Protruding from the hole, die 42b
The hole 35c is drilled in cooperation with

In the above description, the hole 35 is formed in the embossed portion 35a.
Although it has been described that the c is machined, it goes without saying that the upper die 40 and the lower die 38 can be used for drilling at a place other than the embossed portion 35a.

Next, when the upper die 40 further descends by 2 mm and reaches the bottom dead center, the upper die body 44 contacts the upper pad 46 via the cushion 52, and the upper die 40 and the lower die 38 are almost completed. The product 36 is clamped more firmly and the embossing section 3
The shape of 5a is adjusted and the press work is completed.

Next, the operation of the third embodiment of the present invention will be described. In FIG. 15, when the upper die 60 is in the raised position, the semi-finished product 56 drawn by the pressing machine in the previous step is moved downward. After being set on the mold 58, the press machine is operated to lower the ram (not shown) in the direction of arrow J.

The upper die main body 61 and the upper pad 62 are integrally lowered, and in FIG.
After contacting the semi-finished product 56 placed on 8, the semi-finished product 56 is clamped by the punch 58a and the die 62a to bend the bent portion 55a at a predetermined portion.

Since the above bending process is performed with a force smaller than the initial deformation force of the spring unit 59, the bending portion 55a is processed without compressing the spring unit 59.

When the ram of the press machine further descends, the upper pad 62 comes into contact with the lower die 58 and is prevented from descending. Therefore, only the upper die body 61 moves the disc spring (not shown) of the spring unit 59 in the arrow direction. 5m in the direction of arrow J while compressing in direction K
Then, the punching punch 64 protrudes from the upper pad 62, and cooperates with the punching die 58b to machine the hole 55b.

Then, when the upper die 60 further descends by 2 mm and reaches the bottom dead center, the upper die body 61 contacts the upper pad 62 through the cushion 63, and the upper die 60 and the lower die 58 are almost completed. Hold the product 56 more firmly and bend it 55
The shape of a is adjusted and the press work is completed.

[0069]

As described above, according to the present invention, either the upper die or the lower die of the pressing device is divided into a main body and a pad, and the main body and the pad can be moved relative to each other. After connecting through an elastic member having a very large spring constant and performing primary processing on the plate-shaped material with a force smaller than the force required to compress the elastic member, continue to apply a larger force. Since the elastic member is compressed to perform the secondary processing on the plate-shaped material, drawing and bending can be performed by the primary processing, and after the product shape is completed, it is possible to continuously perform the drilling processing as the secondary processing. There is an effect that can be achieved, deformation of the hole shape can be eliminated, and dimensional accuracy between the cores of the holes can be improved.

Further, since the spring unit has a structure in which a plurality of disc springs are stacked and mounted in the housing, a spring unit having an extremely large spring constant capable of withstanding a large force required for press working of a large product is used as a small device. It is possible to manufacture, and as a result, the spring becomes large in size, which makes it difficult to connect the upper mold body and the upper pad of the upper mold through the spring unit, which requires a large working force. There is an effect that the primary processing of a large product can be performed without compressing the spring unit.

Further, the upper die is divided into an upper die body having a punch punch and an upper pad having a die for drawing, and the upper die body and the upper pad are provided. Connected via an elastic member with a large spring constant that is compressed only when a force larger than that required for drawing is applied, and draw into a plate-shaped material with a force smaller than the force required to compress the elastic member. After processing, by applying a larger force, the elastic member is compressed, and the upper pad is moved relative to the upper mold body to perform drilling. Also, the boring process can be performed in one step, which has the effect of significantly reducing the processing time.

Further, the upper die is divided into an upper die body having a punching punch and an upper pad having a coining die, and the upper die body and the upper pad are larger than the force required for coining. After connecting through an elastic member with a large spring constant that is compressed only when a force is applied, and after coining the plate material with a force smaller than the force required to compress the elastic member, Since a large force is applied to compress the elastic member, and the upper pad is moved relative to the upper mold body to perform the drilling process, a plurality of coining processes and drilling processes are performed by the press device 1. Since it can be done at the same time by stroke, processing time and processing cost can be significantly reduced,
There is an effect that deformation of the hole shape can be eliminated and the inter-center accuracy of the hole can be improved.

Further, the upper die is divided into an upper die body having a punching punch and an upper pad having a die for edge bending, and the upper die body and the upper pad are edged. The plate-like material is connected to the plate-like material with a force smaller than the force required to compress the elastic member by connecting it through an elastic member that has a large spring constant that is compressed only when a force greater than the bending force is applied. After bending, further elastic force is applied to compress the elastic member, and the upper pad is moved relative to the upper die body to perform the drilling, so the edge bending and drilling are performed. There is an effect that can be continuously performed in one stroke.

[Brief description of drawings]

1 to 6 relate to a first embodiment of the present invention, and FIG. 1 is a perspective view of a back plate as an example of a pressed product.

FIG. 2 is a plan view of a spring unit.

FIG. 3 is a vertical sectional view of a spring unit.

FIG. 4 is a vertical cross-sectional view of the pressing device showing a state in which a plate-shaped material is set.

FIG. 5 is a vertical cross-sectional view of the press device showing a state in which drawing is performed.

FIG. 6 is a vertical cross-sectional view of the press device showing a state in which punching is performed.

7 to 13 relate to a second embodiment of the present invention,
FIG. 7 is a perspective view of an oil pan as an example of a product.

FIG. 8 is a vertical cross-sectional view of the press device showing a state in which the semi-finished products are set.

FIG. 9 is an enlarged longitudinal sectional view of a main part showing a state of a coining die and a coining punch before processing.

FIG. 10 is a vertical cross-sectional view of the pressing device showing a state of being coined.

FIG. 11 is an enlarged vertical cross-sectional view of a main part showing a state of being coined.

FIG. 12 is a vertical cross-sectional view of the press device showing a state in which punching is performed.

FIG. 13 is an enlarged vertical cross-sectional view of a main part showing a state where drilling is performed.

14 to 19 relate to a third embodiment of the present invention, and FIG. 14 is a perspective view of a cover as an example of a product.

FIG. 15 is a vertical cross-sectional view of a main part of the press device showing a state where a semi-finished product is set.

FIG. 16 is a longitudinal sectional view of an essential part showing a state in which bending is performed.

FIG. 17 is a vertical cross-sectional view of a main part showing a state where drilling is performed.

FIG. 18 is a sectional view of a main part of a semi-finished product.

FIG. 19 is a cross-sectional view of the main parts of a product that has been bent and punched.

20 to 22 relate to a conventional example, and FIG. 20 is a vertical cross-sectional view of a main part of a product whose outer shape is formed into a schematic shape.

FIG. 21 is a longitudinal sectional view of an essential part of a product in which the details of the outer shape are molded into a completed shape.

FIG. 22 is a vertical cross-sectional view of a main part of a product completed by forming holes on the slope.

[Explanation of symbols]

 10 Pressing Device 11 Lower Die 12 Spring Unit as an Example of Elastic Member 13 Upper Die 14 Plate Material 16a Punch 20a Drilling Die 28 Upper Die Main Body 29 Upper Pad 29a Die 32 Drilling Punch 34 Pressing Device 38 Lower Die 39 An Example of Elastic Member Spring unit 40 Upper die 42a Coining punch 42b Drilling die 44 Upper die body 46 Upper pad 46a Coining die 51 Hole punching 58 Lower die 58a Punch 58b Drilling die 59 An example of elastic member Spring unit 60 Upper die 61 Upper die body 62 Upper pad 62a die 64 hole punch

Claims (5)

[Claims] 1. A press device for plastically deforming by pressing a plate-shaped material to perform a forming process, and an upper mold having a surface formed into a product shape, and a surface having the same shape corresponding to the upper mold shape. And a lower die for forming by clamping the plate material between the upper die and the upper die, and a large spring constant that is compressed only when a force larger than the force required for the primary processing of the plate material is applied. The upper die or the lower die is divided into a main body and a pad, and the main body and the pad are movably connected to each other via the elastic member. After performing the primary processing with a force smaller than the force required to compress the elastic member by sandwiching the plate-shaped material with the die and the lower die, a further greater force is applied to compress the elastic member and The fact that it is configured to perform secondary processing on plate material Characteristic press equipment. 2. A press device for plastically deforming a plate-shaped material by pressing to form a product, and an upper mold having a surface formed into a product shape and divided into an upper mold body and an upper pad. A lower die, which has the same surface as the upper die and has the same shape as the upper die, is formed by sandwiching the plate-shaped material between the upper die and the upper die, and a plurality of disc springs are stacked and mounted in the housing. A spring unit having a large spring constant such that the disc spring is deformed and compressed only when a force larger than the force required for the primary processing of the plate-shaped material is applied, and the spring unit is provided through the spring unit. The upper die main body and the upper pad of the die are connected so as to be movable relative to each other, and a primary force is applied with a force smaller than the force required to clamp the plate-shaped material by the upper die and the lower die to compress the spring unit. After processing, apply more force A press device characterized in that it is configured to act to compress the spring unit to perform secondary processing on the plate-shaped material. 3. A lower die having a punch for drawing the plate-shaped material and a punching die for punching the plate-shaped material in a press device for plastically deforming the plate-shaped material by pressing. And an elastic member having a large spring constant such that it is compressed only when a force larger than that required for drawing the plate-shaped material is applied, and the plate-shaped material is drilled in cooperation with the drilling die. An upper mold body having a punching punch disposed therein, and an upper pad having a die formed thereon which is connected to the upper mold body so as to be relatively movable via the elastic member and cooperates with the punch to draw the plate-shaped material. And an upper die configured by being divided into two parts, the force being smaller than the force required to compress the elastic member by sandwiching the plate-shaped material by the die of the upper pad and the punch of the lower die. For plate material After performing the drawing process, a further large force is applied to compress the elastic member to move the upper pad relatively to the upper mold body, and the plate material is perforated to form the plate shape. A press device configured to perform drawing and drilling of a material in one step. 4. A press device for plastically deforming a plate-shaped material by pressing to form the plate, a coining punch for coining the plate-shaped material, and a punching die for forming a hole in the plate-shaped material. A die, an elastic member having a large spring constant such that it is compressed only when a force greater than that required for coining the plate-shaped material is applied, and the plate-shaped material is drilled in cooperation with the drilling die. And a coining die for coining the plate-shaped material in cooperation with the coining punch. An upper die and an upper die divided into two parts are provided, and it is necessary to compress the elastic member by the coining punch and the coining die. After coining the plate-shaped material with a force smaller than the force, a larger force is applied to compress the elastic member to move the upper pad relative to the upper die body. Drilling the plate material, and coining and drilling the plate material 1
A press device characterized in that it is configured to perform in a process. 5. A press device for plastically deforming and forming a plate-shaped material by pressing the plate-shaped material, and a lower die having a punch for edge-bending the plate-shaped material and a punching die for punching the edge. , A hole is formed in the plate-shaped material in cooperation with an elastic member having a large spring constant that is compressed only when a force larger than that required for the edge bending of the plate-shaped material is applied, and the hole-forming die. An upper die body provided with a punching punch and a die formed on the upper die body so as to be relatively movable via the elastic member to cooperate with the punch to perform edge bending of the plate-shaped material. A pad and an upper die configured by being divided into two parts, and after performing edge bending processing on the plate-shaped material with a force smaller than a force required to compress the elastic member by the punch and the die, Great power The elastic member is compressed to move the upper pad relative to the upper mold body to perform a drilling process on the plate-shaped material to perform an edge bending process and a drilling process on the plate-shaped material. A press device characterized in that it is configured to perform in a process.