JP2003117628A - Forging press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forging press which can reliably separate outer burrs from inner burrs, and transport a product and burrs without damaging a cutting blade. SOLUTION: The forging press comprises a lower blade 4 which is fixed to a lower blade holder 2, supports the product G from a lower side and has an inner circumferential blade part 4b to blank inner burrs (b) and an outer circumferential blade part 4a to blank outer burrs (a), an upper punch holder 6 which is freely elevated/lowered, an upper punch 7 which is assembled with the upper punch holder 6 to blank inner burrs (b), and an upper blade 12. An upper end of the blade of the cutting blade is located at the position so that an upper end of the blade of the cutting blade 21 cuts the lower outer burrs (a) out of the two blanked outer burrs (a), and bites even part of the upper outer burrs (a).

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a forging press. More specifically, the present invention relates to a forging press capable of forging-molding products of various shapes from a lump material by sequentially feeding the material between a plurality of dies that are subjected to a press operation, and punching external burrs generated in the molding process.

[0002]

2. Description of the Related Art A work process of a forging press includes four processes of crushing a material, rough punching, finishing punching, and punching. In the final punching step, deformation occurs when punching without supporting the product, so that the outer burr is punched while holding the product.

The technique described in Japanese Patent Publication No. 62-27895 (conventional example 1), as shown in FIGS. 4 to 5, sequentially feeds a material between a plurality of dies 115 and 116 which are pressed. In a forging press equipped with a transfer feed device for forging and forming, the punching dies 115 'and 116' arranged at the rearmost part of the material feeding direction following the finishing die are linked to the press drive source and the product from the lower die Equipped with a knockout device that separates the outer burr from the top and bottom at the same time in a separated state, the product gripping claw and the outer burr conveying claw that carry out the product 120 and the outer burr 113 that have been separated from the punching die are installed on both feed bars The opposite side is equipped separately by vertically separating it. Then, after punching the product 120 and the outer burr 113 simultaneously with the operation of the knockout device, the upper and lower parts are separated from the lower punching die,
Hold the product 120 and carry it out with the outer burr 113.
Shoot 120 into chute 128 and shoot outer burr 113 into chute 12
I am trying to throw it in 7.

[0004]

However, in the prior art example 1, it is difficult to separate the product and the burr depending on the shape of the forged product, and particularly in the case of the flange portion with the shaft, it is difficult to separate the product and the outer burr. It is difficult to adopt in reality. Further, in order to carry out the burr, if the product is carried out first and then the burr is carried out, it becomes impossible to continuously hit the product, which is a factor that hinders the productivity. Furthermore, the structure of the transfeeder device that conveys products and burrs becomes complicated, and a separate chute is required.
There is a problem that the manufacturing price rises.

In view of the above circumstances, the present invention makes it possible to reliably separate the outer burr even if the outer burr is difficult to separate, such as a flanged component with a shaft, and to make the structure of the transfeeder or chute complicated. It is an object of the present invention to provide a forging press that can carry out products and burrs without performing.

[0006]

According to the forging press of claim 1, the material is sequentially fed into a plurality of molds to be formed, and finally the product is punched by a punching die to form a product and an annular outer burr on the outer periphery of the product. Is a forging press that separates the lower blade holder and the lower blade that is fixed to the lower blade holder, supports the product from the bottom surface, and has a blade portion that punches out the outer burr, and can move up and down. Upper punch holder, a product retainer that is incorporated into the upper punch holder and that pushes the product from the top when descending, an upper blade for punching the outer burr formed on the upper punch holder, and a lower blade. And a dividing blade that divides the outer burr into two or more in the circumferential direction,
At the lowermost position of the upper blade, the upper end of the blade of the cutting blade is cut out of the outer burrs on the lower side of the two or more outer burrs punched and overlapped, and up to a part of the upper outer burr. It is characterized by being in a bite position. The forging press according to claim 2,
The invention according to claim 1 is characterized in that the dividing blade pushes the annular outer burr in the radial direction at a plurality of positions in the circumferential direction.

According to the first aspect of the invention, when the upper punch holder is lowered in the punching step, the outer burr is punched from the product by the upper blade and the lower blade. Then, the annular outer burr remains on the cutting blade, but at this time, the outer burr that has been punched later is positioned on the outer burr that has been punched earlier, and two outer burrs overlap. Become. Then, when the upper blade is at the lowest position, the dividing blade completely divides the lower outer burr, but since it only partially cuts into the upper outer burr, the dividing blade may hit the lower surface of the upper blade. Without being damaged. Further, since the lower outer burr is divided into two or more in the circumferential direction by the dividing blade, it falls by its own weight. For this reason, since it is not necessary to convey the burr by the transfer feeder, the structure of the forging press is simplified, continuous stamping of products is possible, and productivity is improved. According to the invention of claim 2, the annular outer burr is pushed and cut by the dividing blade in the radial direction, so that it is surely divided into a plurality of pieces and easily discharged by the chute or the like.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a forging press according to an embodiment of the present invention will be described with reference to the drawings. Figure 1 (A) shows
1 is a partial sectional front view of a punching die portion in a forging press according to an embodiment of the present invention, FIG. 2B is an explanatory view of a state where outer burrs are separated, and FIG. 2 is a punching in the forging press of FIG. FIG. 3 is a vertical cross-sectional view of the die part, and FIG. 3 is a process drawing of the forging press of FIG.

The punching die shown in FIG. 2 is used in a forging press for sequentially forming a material into a plurality of dies,
This is the mold used for deburring in the final step. In the figure,
G is a product, which is a flanged component with a shaft in which a disk-shaped flange portion and a shaft-shaped shaft portion are integrated. This product G is finally formed by punching out an annular outer burr a and a central cylindrical middle burr b.

In FIG. 2, reference numeral 1 is a base plate on which a lower blade holder 2 is fixed. At the center of the lower blade holder 2, a drop hole 3 for dropping a middle burr b described later is formed. A lower blade 4 is fixed to the lower blade holder 2. This lower blade 4
The product G supports the product G from the lower surface, and is formed with an inner peripheral blade portion 4b around the punch hole for punching the middle burr b and an outer peripheral blade portion 4a for punching the outer burr a. Further, on the outer periphery of the lower blade 4, a dividing blade 21 for dividing the outer burr a, which will be described in detail later, is arranged.

Reference numeral 6 denotes an upper punch holder, which can be raised and lowered by an elevator mechanism (not shown). The following members are incorporated in the upper punch holder 6.
7 is an upper punch, the upper end of which is an upper punch holder 6
Is stuck to. Reference numeral 8 denotes a product retainer, to which downward compression force is applied by a spring 11 externally inserted on the guide rod 9. The lower surface of the upper punch holder 6 outside the product retainer 8 serves as the upper blade 12.
An outer burr a is formed by the outer blade portion 4a of the upper blade 12 and the lower blade 4.
Is cut from the product G, and the middle burr b is punched from the product G by the upper punch 7 and the inner peripheral blade portion 4b of the lower blade 4.

A dividing blade 21 is provided on the peripheral portion of the lower blade 4 so as to face the upper blade 12. The dividing blade 21 may have any structure as long as it can divide the annular outer burr a into two or more in the circumferential direction, but an example thereof will be described below. As shown in FIG. 1, the cutting blade 2
Four 1 are provided around the lower blade 4. Each of the dividing blades 21 is formed by forming a blade 23 having a triangular cross section on a base 22. The upper end of the blade 23 of the dividing blade 21 is the upper blade 12
At the lowest position, the outer burrs a1 on the lower side of the two outer burrs a stacked on each other are completely cut, and the height is set to partially cut into the upper outer burrs a2. If the outer burr a1 on the lower side cannot be completely cut, the dividing blade is useless. On the contrary, if the outer burr a2 on the upper side can also be completely cut, the cutting edge collides with the lower surface of the upper blade 12 and damages the cutting edge. Is. Due to this structure, if only one outer burr a1 is punched out, the outer burr a1 is not cut by the dividing blade 21, and the outer burr a1 of the succeeding product is not cut.
When 2 is punched out and the two outer burrs a1 and a2 overlap, the lower outer burr a1 that has been punched from the preceding product and remains on the dividing blade 21 is cut.

The blade 22 of the dividing blade 21 pushes the outer burr a in the radial direction. Therefore, the annular outer burr a
Since 1 is divided into four pieces, it is carried out by its own weight after the division. It should be noted that the dividing blade 21 is designed so that the dividing piece that falls by its own weight does not get caught and falls smoothly.
The outer circumference of the lower blade between the adjacent cutting blade 21 and the adjacent cutting blade 21 is preferably formed on the inclined guide surface 24.

Next, the forming operation of the forging press of this embodiment will be described. I, II, and III in FIG. 3 indicate the crushing step I, the roughing step II, and the finishing step III,
In each process, the material M is the crushed material M1 and the rough-cut material M
2. Molded like finishing material M3. Finishing material M
The outer shape of the product 3 is completed as the product G, and the outer burrs a and the middle burrs b can be punched out thereafter. And the code
In the punching step indicated by IV, deburring is performed by the punching die shown in FIG. 1 (simultaneously with the outer burr a and the inner burr b). In this case, as shown in FIG. 1A, the outer burr a1 is first punched and remains on the dividing blade 21. Then, when the outer burr a2 is punched from the succeeding product and the upper blade 12 is lowered to the lowest position, the lower outer burr a1 punched from the preceding product is separated by the separating blade 21 into a plurality of pieces. And
As shown in FIG. 3B, the pieces of the outer burr a1 which have been separated fall on the inclined guide surface 24 and can be discharged to the outside of the machine by a chute without using a special conveying device.

Next, another embodiment of the present invention will be described. As the dividing blade in the present invention, any blade may be used as long as it can divide the outer burr a into a plurality of pieces.
In addition, it is optional to divide the outer burr a into two pieces.
The above can be arbitrarily selected. Furthermore, the dividing blade 21 may be integrally formed on the outer periphery of the lower blade 4, or may be attached separately. In the above embodiment, the outer burr a
However, the present invention can be applied to a forging press that punches only the outer burr a without the inner burr b.

[0016]

According to the invention of claim 1, since the annular outer burr is divided into two or more in the circumferential direction, it is not necessary to drop the burr as it is and convey the burr by the transfer feeder. The structure of is simple and continuous stamping of products is possible, improving productivity. Also,
The cutting blade is not scratched. According to the invention of claim 2, it is surely cut into a plurality of pieces by push-cutting, and can be easily discharged by a chute or the like.

[Brief description of drawings]

FIG. 1A is a front view of a partial cross-section of a punching die portion of a forging press according to an embodiment of the present invention, and FIG. .

FIG. 2 is a cross-sectional view of a punching die portion in the forging press of FIG.

FIG. 3 is a process drawing of the forging press of FIG. 1.

FIG. 4 is a front view of a main part of a forging press of Conventional Example 1.

FIG. 5 is an explanatory diagram of a product and an outer burr carry-out work in Conventional Example 1.

[Explanation of symbols] 2 Lower blade holder 4 lower blade 6 Upper punch holder 7 Upper punch 11 spring 12 Upper blade 21 cutting blade 22 units 23 blades

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsuo Endo             1003 Fujikubo, Miyoshi-cho, Iruma-gun, Saitama Stock             Company Kakuda Iron Works F-term (reference) 4E087 AA09 DB02

Claims (2)

[Claims] 1. A material is sequentially fed into a plurality of molds to be molded,
Finally, it is a forging press that performs a punching operation with a punching die to separate the product and an annular outer burr on the outer periphery of the product, which is fixed to the lower blade holder and the lower blade holder, and supports the product from the lower surface. In addition, a lower blade having a blade portion for punching out the outer burr, an upper punch holder that can be raised and lowered, a product retainer that is incorporated into the upper punch holder and presses a product from the upper surface when descending, and formed on the upper punch holder The upper blade for punching the outer burr, and the dividing blade provided on the lower blade, which divides the outer burr into two or more in the circumferential direction, are at the lowermost position of the upper blade, It is characterized in that the upper end of the blade of the cutting blade is located at a position where the lower outer burr of the two or more outer burrs punched out and stacked is cut to partially cut into the upper outer burr. Forging press. 2. The forging press according to claim 1, wherein the dividing blade pushes out the annular outer burr in the radial direction at a plurality of positions in the circumferential direction.