JPH11254079A - Forging die device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily set a stock to a die, and to easily form the stock to the desired shape. SOLUTION: Mounting bases 35, 55 having screw holes 40, 60 in the vertical direction, and jack adjusting bases 36, 56 having screw shafts 45, 65 to be screwed in the screw holes 40, 60 are provided on at least one of an upper die unit 31 and a lower die unit 32. The die height can be adjusted by turning the jack adjusting bases 36, 56 around the screw shafts 45, 65. Plate-like upsetting dies 42, 62 are interchangeably provided on the jack adjusting bases 36, 56. The upsetting dies 42, 62 are provided with flat forming surfaces 48, 68 on the side in contact with a stock W1 to be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forging die apparatus used in a step of forming a metal part into a predetermined shape by forging.

[0002]

2. Description of the Related Art It is known that metal products such as gears used for a power transmission system of an automobile are manufactured by forging. In this type of metal product, a material such as steel is formed into a shape close to the final product by forging, and then unnecessary portions such as an outer peripheral portion and an inner peripheral portion are finished by machining such as cutting.

For example, a forged product W for a ring gear shown in FIG. 5 is formed into an annular shape by a forging device 1 as shown in FIG. The outer and inner peripheries of the forged product W are machined by machining.
After being cut to the finished contour shape indicated by the dashed-dotted line F, the gear is completed through steps such as toothing and heat treatment.

[0006] The forging apparatus 1 shown in FIG.
Upper and lower mold units 2 and 3 for the process, upper and lower mold units 4 and 5 for the second process, and upper and lower mold units 6 and 7 for the third process
And upper and lower mold units 8 and 9 for the fourth step.
The upper mold units 2, 4, 6, 8 are provided on a common upper mold base 10, and the lower mold units 3, 5, 7, 9 are
1 is provided. By lowering the upper die base 10 along the guide post 12 by a press machine (not shown), the material W1 is formed between the upper die units 2, 4, 6, 8 and the lower die units 3, 5, 7, 9. It is designed to be pressed. Material W1 is transfer chuck 1
3, the forging progresses in a stepwise manner while being sequentially fed step by step from the mold units 2 and 3 for the first process to the mold units 6 and 7 for the third process via the mold units 4 and 5 for the second process. The configuration is such that deburring is performed in the mold units 8 and 9 in the fourth step.

Conventionally, in the first step, the material W1 is pressed by the upper die 15 and the lower die 16 having the concave portions 15a and 16a as shown in FIG. The part ω was formed. And this material W
1 is a mold device 20 as shown in FIG.
Is set on the lower mold 21. At the center of the lower mold 21, there is provided a concave portion 25 into which the convex portion ω of the material W1 can be fitted. By fitting the convex portion ω of the material W1 into the concave portion 25, After the positioning of the material W1, the upper die 22 is lowered to the bottom dead center of the press as shown in FIG. 9, whereby the forged product W is roughly formed.

[0006]

The material W1 in which the convex part ω is formed by the conventional upper die 15 and lower die 16 for the first step.
In order to fit the material W into the recess 25 of the lower mold 21 for the second step, it is necessary to drop the material W1 conveyed by the transfer chuck 13 into the recess 25 in a state where the material W1 is accurately positioned right above the lower mold 21. is there. For this reason, high positioning accuracy is required for the transfer chuck 13 and the like.

However, the transfer chuck 13
In some cases, the material W1 may get on an eccentric position with respect to the concave portion 25 due to a limit on the accuracy of the material W, abrasion of the lower mold 21, or the like. If the upper die 22 descends and the raw material W1 is pressed in such an eccentric state, the forged product W may be chipped, have an abnormal shape, or cause a mold trouble.

Further, since the conventional upper die 15 and lower die 16 are fixed types, the height of the die cannot be adjusted. For this reason, it is necessary to adjust the height of the transfer chuck 13 every time the setup of the mold is changed, which is a factor that takes time to change the setup. In addition, the conventional upper mold 15 and lower mold 16 need to perform welding and other overlay corrections in order to provide the recesses 15a and 16a in accordance with the product shape of the material W1. I needed it.

Accordingly, an object of the present invention is to provide a forging die apparatus which can easily form a raw material into a predetermined shape and can easily set the die, thereby reducing problems such as die troubles and molding defects. It is in.

[0010]

According to a first aspect of the present invention, there is provided a mold apparatus configured to rotate a jack adjuster provided on a mold unit around the screw shaft. This makes it possible to variably set the height of the upright type. The molding surface of this upsetting die has a flat shape, and when the upper die unit descends to the bottom dead center of the press, the material is crushed into a disk shape by this molding surface. When the molding surface is worn or damaged, the upsetting die is removed from the jack adjustment table and replaced with a new upsetting die.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The mold device 30 for the first step shown in FIGS. 1 and 2 includes an upper mold unit 31 and a lower mold unit 32.

The upper die unit 31 includes an upper mount 35 and an upper jack adjuster 36. A screw hole 40 is formed in the center of the upper mounting base 35 along the vertical direction.
On the inner peripheral surface of the screw hole 40, a thread having a predetermined pitch that forms a female screw is formed. The screw hole 40 is open on the lower surface side of the upper mounting base 35. The upper mounting base 35 is provided, for example, in a first process portion (a portion corresponding to the upper die unit 2) of the upper die base 10 as shown in FIG.

The upper jack adjustment base 36 has a disk-shaped main body 41, a flat upsetting die 42 provided on the lower surface side of the main body 41, and a fixing part 42 for fixing the upsetting die 42 to the main body 41. The mounting ring 43 and the mounting ring 43
And a screw shaft 45 protruding above the main body 41.

The screw shaft 45 extends vertically. On the outer peripheral surface of the screw shaft 45, a screw thread forming a male screw that can be screwed into the screw hole 40 is formed. With the screw shaft 45 screwed into the screw hole 40, the screw shaft 45 is
By rotating the jack adjustment table 36 in the axial direction (up and down direction) of the screw shaft 45 in accordance with the amount of rotation, the height of the upset mold 42 can be adjusted. The screw hole 40 and the screw shaft 45 constitute a height adjusting mechanism 46 according to the present invention. A set screw 47 for fixing the screw shaft 45 to a desired position is provided on a side portion of the mounting base 35.

The lower surface of the upsetting mold 42, that is, the material W1
Is formed in a flat shape. The upsetting die 42 can be easily removed from the main body 41 by detaching the attachment ring 43 from the main body 41 by loosening the fixing member 44 or the like.

On the other hand, the lower mold unit 32 is
5 and a lower jack adjustment table 56 are included. Lower mounting base 5
A screw hole 60 is formed in the center of 5 along the vertical direction. On the inner peripheral surface of the screw hole 60, a thread having a predetermined pitch that forms a female screw is formed. The screw hole 60 is open on the upper surface side of the mounting table 55. The mounting table 55 is connected to the first process portion (lower die unit 3) of the lower die base 11 shown in FIG.
).

The lower jack adjusting base 56 has a disc-shaped main body 61, a flat upsetting die 62 provided on the upper surface side of the main body 61, and a fixing device for fixing the upsetting die 62 to the main body 61. The mounting ring 63 and the main body 61
And a screw shaft 65 protruding below the main body 61.

The screw shaft 65 extends vertically. On the outer peripheral surface of the screw shaft 65, a screw thread forming a male screw that can be screwed into the screw hole 60 is formed. This screw shaft 6
5 is screwed into the screw hole 60, the screw shaft 65 is rotated integrally with the main body 61, and the jack adjustment base 56 is screwed in the axial direction of the screw shaft 65 (vertical direction) according to the amount of rotation. By doing so, it is possible to adjust the height of the upset die 62. That is, the screw hole 60 and the screw shaft 65 constitute a height adjusting mechanism 66 according to the present invention. A set screw 67 for fixing the screw shaft 65 to a desired position is provided on a side portion of the mounting table 55.

The upper surface of the upsetting mold 62, that is, the material W1
Has a flat shape parallel to the upper molding surface 48. The upsetting die 62 is configured to attach the attachment ring 63 by loosening the fixing member 64 or the like.
By removing the upsetting die 62 from the main body 61, the upsetting die 62 can be easily removed from the main body 61.

The mold apparatus 7 for the second step shown in FIGS. 3 and 4
0 includes an upper unit 71 and a lower unit 72. The upper die unit 71 includes an upper mounting base 73, a pressure receiving plate 74, and an upper die 75 including an inner die 75a and an outer die 75b.
, A ring 76 for holding an upper mold 75, a knockout pin 77, and the like. The upper mounting base 73 is provided in a second process portion (a portion corresponding to the upper die unit 4) of the upper die base 10 shown in FIG.

The lower mold unit 72 includes a lower mounting table 80,
A pressure receiving plate 81, a lower die 82 including an inner die 82a and an outer die 82b, a knockout pin 83, and the like are provided. On the upper surface (molding surface) side of the lower die 82, a concave portion 84 having a circular inner peripheral surface 84a as viewed from above is formed. Recess 8
The inner diameter d of 4 is a dimension that the disk-shaped material W1 having a predetermined outer diameter D can just enter. Lower mounting base 80
Is provided in a second process portion (a portion corresponding to the lower die unit 5) of the lower die base 11 shown in FIG.

Next, the mold apparatus 30, 70 of the above-described embodiment is used.
The operation and the like of will be described. As shown in FIG. 1, the heated columnar material W1 is placed on the upsetting die 62 with the axis C thereof standing upright. Then, as shown in FIG. 2, the upper die unit 31 is lowered to the bottom dead center of the press. By doing so, the material W1 is crushed flat in the axial direction, so that the outer diameter of the material W1 increases. This material W1
Is formed into a disk shape having a desired outer diameter D in accordance with the distance H between the molds and the volume of the material W1 adjusted in advance.

In order to adjust the height and the distance H between the upset dies 42 and 62, the jack adjustment bases 36 and 56 are rotated around the screw shafts 45 and 65 with the set screws 47 and 67 loosened. It should be done. If the molding surfaces 48, 68 are worn, damaged or deformed, the upsetting dies 42, 68
62 is removed from the main bodies 41 and 61 and replaced with a new one.

The disk-shaped material W1 (shown in FIG. 2) formed in the first step
(Shown in FIG. 6), and is conveyed to the mold apparatus 70 for the second step shown in FIG. In the second step, when the upper mold unit 71 and the lower mold unit 72 are open to each other,
The disc-shaped material W1 is put into the concave portion 84 of the lower die 82 by the transfer chuck 13. At this time, the material W1
Is in contact with the inner peripheral surface 84a of the concave portion 84,
The center position of the material W1 with respect to the lower mold 82 matches. Since the material W1 is formed into a disk shape so as to have a predetermined outer diameter D in the first step, the outer periphery of the material W1 is
4 can reliably contact the inner peripheral surface 84a.

Therefore, according to the mold devices 30 and 70, the transfer of the material W1 by the transfer chuck 13 is different from the conventional mold center setting method which required severe adjustment, in the first step, by the upsetting mold 62. Since it suffices to simply place the material W1 on the base material, the center of the material W1 and the center of the upsetting mold 62 may be offset from each other. Further, in the second step, the raw material W1 is
Since the outer diameter D of the material W1 matches the inner diameter d of the concave portion 84 simply by dropping the material W1, the material W1 is naturally positioned by the lower mold 82. For this reason, the positioning failure in the second step is eliminated, and troubles such as prevention of eccentricity of the material W1 and abnormal stop of the transport mechanism are reduced.

After the material W1 is set in the lower mold 82, the upper mold unit 71 descends to the bottom dead center of the press as shown in FIG. 4, whereby the upper mold 75 and the lower mold 82 are closed, and the material W1 is struck. By being pressed, a forged product W having a shape close to the final product is obtained.

In the mold apparatus 30 of the above-described embodiment, the jack adjusters 36, 56 capable of adjusting the height are provided on both the upper mold unit 31 and the lower mold unit 32. You may make it provide a jack adjustment stand in one of them. For example, the jack adjustment table 36 may be provided only in the upper unit 31 and the lower unit 32 may be a simple flat type.

[0028]

According to the mold apparatus of the first aspect,
Since the material is formed into a disk shape by the upsetting die having a flat molding surface, it is not necessary to precisely position the material with respect to the upsetting die, and the transfer of the material by the transfer chuck or the like is easy. Become. If this disc-shaped material is put in the circular recess of the lower mold in the next step, positioning and alignment of the material with respect to the lower mold can be easily performed.

According to the mold apparatus of the present invention, the distance between the upper and lower molds can be adjusted easily and in a short time by a height adjusting mechanism having a simple structure. The distance between the molds can be fine-tuned to give a value. Moreover, since the height of the mold can be easily variably set by the height adjusting mechanism, it is not necessary to adjust the height of the transfer chuck at the time of changing the setup, and the setup can be changed quickly.

Since the mold apparatus of the present invention uses an upsetting mold having a simple shape that can be replaced, when a problem such as wear or surface roughness occurs on the molding surface, the upsetting mold is used as necessary. Can be easily replaced. This upright mold is easy to manufacture and requires material and processing costs for the mold,
Heat treatment costs, surface treatment costs, etc. can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a mold apparatus according to an embodiment of the present invention when the mold is opened.

FIG. 2 is a longitudinal sectional view of the die apparatus shown in FIG. 1 at the time of bottom dead center of press.

FIG. 3 is a vertical cross-sectional view of a mold apparatus for a second step when the mold is opened.

FIG. 4 is a sectional view of the mold apparatus shown in FIG. 3 at the time of the bottom dead center of the press.

FIG. 5 is a sectional view showing an example of a forged product.

FIG. 6 is a perspective view schematically showing an outline of a forging device.

FIG. 7 is a longitudinal sectional view showing a part of a conventional first step mold apparatus.

FIG. 8 is a longitudinal sectional view showing a part of a conventional second step mold apparatus.

FIG. 9 is a cross-sectional view of the mold apparatus shown in FIG. 8 at the time of the bottom dead center of the press.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 30 ... Forging die apparatus 31 ... Upper mold unit 32 ... Lower mold unit 35, 55 ... Mounting stand 36, 56 ... Jack adjustment stand 40, 60 ... Screw hole 42, 62 ... Upright mold 45, 65 ... Screw shaft 46 , 66 ... Height adjustment mechanism

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI B30B 15/02 B30B 15/02 C

Claims (1)

[Claims] 1. A forging die apparatus comprising an upper die unit and a lower die unit for forging a material, wherein at least one of the upper die unit and the lower die unit has a screw hole along a vertical direction. And a jack adjustment table having a screw shaft screwed into the screw hole and having a height adjustable with respect to the mounting table, and the jack adjustment table has a flat molding surface formed on a side in contact with the material. A forging die apparatus, comprising: an interchangeable upsetting die.