JP3676718B2 - Forging press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a forging press. More particularly, the present invention relates to a forging press capable of forging and forming products of various shapes from a block material by sequentially feeding the material between a plurality of dies to be pressed, and punching out external burrs generated in the forming process.
[0002]
[Prior art]
The forging press work process includes four processes: crushing material → rough punching → finish punching → punching. In the final punching process, if the product is punched without being supported, deformation occurs. Therefore, the outer burr is punched while the product is held.
[0003]
The technique (conventional example 1) described in Japanese Examined Patent Publication No. 62-27895 is forged by progressively feeding a material between a plurality of dies 115 and 116 to be pressed as shown in FIGS. In a forging press with a transfer feed device to be molded, the punching dies 115 ′ and 116 ′ disposed at the rearmost part in the material feed direction following the finishing die are connected to the product and outer burrs from the lower die in conjunction with the press drive source. Equipped with a knockout device that allows the product 120 and the outer burr 113 to be unloaded from the punching die at the opposite side of both feed bars. They are separated from each other and equipped with facing each other.
Then, after the punched product 120 and the outer burr 113 are separated from the lower punching die in the vertically separated state simultaneously by the operation of the knockout device, the product 120 is gripped and taken out together with the outer burr 113 to the product. 120 is input to the chute 128, and the outer burr 113 is input to the chute 127.
[0004]
[Problems to be solved by the invention]
However, in this conventional example 1, it is difficult to separate the product and the burr depending on the shape of the forged product, and in particular, it is difficult to separate the product and the external burr in the shaft flange part, and it is difficult to adopt in practice. In addition, if the burr is taken out first, and then the burr is taken out, it becomes impossible to continuously hit the product, which hinders productivity. Furthermore, there is a problem that the structure of the transfeeder device for transporting products and burrs becomes complicated and a separate chute is required, so that the press structure becomes complicated and the manufacturing price increases.
[0005]
In view of the above circumstances, the present invention can reliably separate the outer burr even if it is difficult to separate the outer burr, such as a flange part with a shaft, without complicating the structure of the transfeeder or chute. An object of the present invention is to provide a forging press capable of carrying out products and burrs.
[0006]
[Means for Solving the Problems]
The forging press according to claim 1 is a forging press in which a material is sequentially fed to a plurality of dies and molded, and finally, a punching operation is performed with a punching die to separate a product from an annular outer burr on the outer periphery of the product. A lower blade holder, a lower blade that is fixed to the lower blade holder, supports the product from the lower surface, and has a blade portion that punches the outer burr, an upper punch holder that can be raised and lowered, and the upper punch A product presser that is assembled in a holder and presses the product from the upper surface when descending, an upper blade that is formed on the upper punch holder to punch out the outer burr, and the outer burr provided on the lower blade is circular. A cutting blade that divides into two or more in the circumferential direction, and at the lowest lowered position of the upper blade, the upper end of the blade of the cutting blade is punched and stacked, Cut the outer burr and bite into part of the upper outer burr Characterized in that consists in location.
A forging press according to a second aspect is characterized in that, in the invention according to the first aspect, the cutting blade pushes the annular outer burr in a radial direction at a plurality of locations in a circumferential direction.
[0007]
According to invention of Claim 1, there exists the following effect.
a) When the upper punch holder is lowered in the punching process, the outer burr is punched from the product by the upper blade and the lower blade. The annular outer burr remains on the cutting blade. At this time, the outer burr that was punched later is positioned on the outer burr that was previously punched, and the two outer burrs overlap. Become. When the upper blade is lowered, the dividing blade completely divides the lower outer burr, but only partially digs into the upper outer burr, so the dividing blade may hit the lower surface of the upper blade. No damage.
b) Further , the lower outer burr is divided into two or more in the peripheral direction by the cutting blade, so that it falls by its own weight. For this reason, since it is not necessary to convey burrs by the transfer feeder, the structure of the forging press is simplified, the product can be continuously stamped, and the productivity is improved.
c) Since the annular outer burr is pushed in the radial direction by the dividing blade, it is surely divided into a plurality of pieces and can be easily discharged by a chute or the like.
d) Since the divided outer burr slides down on the inclined guide surface 24, it can be discharged out of the machine by a chute without using a special conveying device.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, a forging press according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1A is a partially sectional front view of a punching die portion in a forging press according to an embodiment of the present invention, and FIG. 1B is an explanatory view showing a state where an outer burr is separated. 2 is a longitudinal sectional view of a punching die portion in the forging press of FIG. 1, and FIG. 3 is a process diagram in the forging press of FIG.
[0009]
The punching die shown in FIG. 2 is used for a forging press in which a raw material is formed into a plurality of dies in order, and is a die used for deburring that is the final process.
In the figure, G is a product, which is a flange component with a shaft in which a disc-shaped flange portion and a shaft-shaped shaft portion are integrated. This product G is finally molded by punching an annular outer burr a and a central cylindrical burr b.
[0010]
In FIG. 2, reference numeral 1 denotes a base plate, and a lower blade holder 2 is fixed on the base plate 1. A drop hole 3 is formed in the center of the lower blade holder 2 for dropping an intermediate burr b, which will be described later.
A lower blade 4 is fixed to the lower blade holder 2. The lower blade 4 supports the product G from the lower surface, and is formed with an inner peripheral blade portion 4b around a punching hole for punching the intermediate burr b and an outer peripheral blade portion 4a for punching the outer burr a. .
Further, a cutting blade 21 which will be described in detail later for cutting the outer burr a is disposed on the outer periphery of the lower blade 4.
[0011]
Reference numeral 6 denotes an upper punch holder which can be moved up and down by a lifting mechanism (not shown). The upper punch holder 6 is assembled with the following members. Reference numeral 7 denotes an upper punch whose upper end is fixed to the upper punch holder 6. Reference numeral 8 denotes a product presser, to which a downward compressive force is applied by a spring 11 externally attached to the guide rod 9. In the upper punch holder 6, the lower surface of the outer portion of the product presser 8 is the upper blade 12.
The outer burr a is cut off from the product G by the outer peripheral edge 4 a of the upper blade 12 and the lower blade 4, and the intermediate burr b is punched out of the product G by the upper punch 7 and the inner peripheral edge 4 b of the lower blade 4. It has become.
[0012]
A cutting blade 21 is provided around the lower blade 4 so as to face the upper blade 12. The cutting blade 21 may be of any structure as long as it can divide the annular outer burr a into two or more in the circumferential direction. Next, an example will be described.
As shown in FIG. 1, four cutting blades 21 are provided around the lower blade 4. Each cutting blade 21 is formed by forming a blade 23 having a triangular cross section on a table 22.
The upper end of the blade 23 of the cutting blade 21 is completely cut at the position where the upper blade 12 is lowered to completely cut the outer burr a1 on the lower side of the two outer burrs a, and partially on the outer burr a2. It is said to be high enough to bite into. If the lower outer burr a1 cannot be completely cut, it will not serve as a cutting blade. Conversely, if the upper outer burr a2 seems to be cut completely, the cutting edge will collide with the lower surface of the upper blade 12 and damage the cutting edge. It is.
Due to such a structure, if only one outer burr a1 is punched out, the outer burr a1 is not cut by the cutting blade 21, the outer burr a2 of the subsequent product is punched out, and the two outer burrs a1 and a2 overlap. When this occurs, the lower outer burr a1 which is punched from the preceding product and remains on the cutting blade 21 is cut.
[0013]
Blade 2 3 of the cutting blade 21 is to straw cutter to the outer burr a score enters radially. Therefore, since the annular outer burr a1 is divided into four pieces, it is carried out by its own weight after the division.
In addition, the outer periphery of the lower blade between the cutting blade 21 and the adjacent cutting blade 21 is directed to the guide surface 24 inclined downward so that the cutting piece that falls by its own weight does not get caught and falls smoothly. It is preferable to form it.
[0014]
Next, the forming action in the forging press of this embodiment will be described.
In FIG. 3, I, II, and III indicate a crushing process I, a roughing process II, and a finishing process III. In each process, the material M is a crushing material M1, a roughing material M2, and a finishing material M3. It will be shaped like this. The outer shape of the finishing material M3 is completed as the product G, and the outer burr a and the inner burr b can be punched out.
Then, in the punching step indicated by reference numeral IV, burrs are removed by the punching die shown in FIG. 1 (simultaneous burr b and b). In this case, as shown in FIG. 1A, the outer burr a1 is first punched and remains on the cutting blade 21. Next, when the outer burr a2 is punched from the succeeding product and the upper blade 12 is lowered, the lower outer burr a1 punched from the preceding product receives the separating action of the cutting blade 21 and is divided into a plurality of pieces. Then, as shown in FIG. 7B, the pieces of the outer burr a1 that have been scattered slide down on the inclined guide surface 24, so that they are discharged to the outside by a chute without using a special conveying device. it can.
[0015]
Next, another embodiment of the present invention will be described.
Any cutting blade may be used in the present invention as long as the outer burr a can be divided into a plurality of pieces. Further, the number of outer burrs a can be arbitrarily divided, and two or more can be arbitrarily selected. Furthermore, the cutting 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 and the middle burr b are punched at the same time. However, it is needless to say that the present invention can also be applied to a forging press in which only the outer burr a is punched without the middle burr b.
[0016]
【The invention's effect】
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 fall down as it is and to transfer the burr by the transfer feeder, so that the structure of the forging press is simplified. Product can be stamped continuously and productivity is improved. Further, the dividing blade is not damaged.
According to the invention of claim 2, it is surely divided into a plurality of pieces by push-off and can be easily discharged by a chute or the like.
[Brief description of the drawings]
FIG. 1A is a partial cross-sectional front view of a punching die portion in a forging press according to an embodiment of the present invention, and FIG. 1B is an explanatory view showing a state where an outer burr is separated. .
2 is a cross-sectional view of a punching die part in the forging press of FIG. 1. FIG.
FIG. 3 is a process diagram in 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 outer burr carrying-out operation 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 Dividing blade 22 Unit 23 Blade

Claims (1)

A forging press in which a material is sequentially fed to a plurality of molds and molded, and finally, a punching operation is performed to separate a product from an annular outer burr on the outer periphery of the product,
A lower blade holder,
A lower blade fixed to the lower blade holder, supporting the product from the lower surface, and having a blade portion for punching the outer burr;
An upper punch holder that can be raised and lowered,
A product presser that is assembled into the upper punch holder and presses the product from the top when lowered,
An upper blade for punching the outer burr formed on the upper punch holder;
It provided on the peripheral portion of the lower knife, and a plurality of cutting blades for cutting the outer burr into two or more in the circumferential direction, was lower inclined toward the outer periphery of the lower blade on the outside between the cutting blades adjacent It consists of a guide surface ,
The cutting blade is configured to push an annular outer burr at a plurality of locations in the circumferential direction so as to have a score in the radial direction. The blade of the cutting blade at the lowest lowered position of the upper blade. The forging press is characterized in that the upper end of the forging press is located at a position where the lower outer burr is cut and cut to a part of the upper outer burr among the two or more outer burr stacked by punching .

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