JPH10156472A - Forging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently forge a metal stock. SOLUTION: In a state that a metal stock is inserted in a stock insert hole 13 provided in the axial center of a ram frame 13, a cylindrical cam frame 12 fitted into the ram frame 13 is rotated. Each pair of ram guide holes 13b communicating each other are arranged in the stock insert hole 13a facing each other. Each cam follower 17 fitted into each ram guide 13a is respectively brought into press-contact to an inner peripheral face of the cam frame 12, when each cam face 12b of the cam frame 12 is brought into contact with each cam follower 17, each cam follower 17 is retreated in the ram guide hole 13b, a ram 15 in each ram guide hole 13b is pushed out into the stock inserting hole 13a by the cam follower 17, the metal stock in the stock insert hole 13a is press forged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forging device used for forging a metal material such as a steel material, and more particularly, to efficiently forging a metal material into a predetermined shape at the time of preforming before stamping. Related to a forging device that can be used.

[0002]

2. Description of the Related Art When a metal material such as a steel material is forged into a predetermined shape, an air stamp hammer in which a ram is driven up and down is usually used. As an air stamp hammer, for example, a rough processing mold, a medium processing mold, and a finishing processing mold are formed on a single mold surface, and the metal material is a rough processing mold, a medium processing mold, and a finishing processing. It is sequentially supplied to a mold, and is subjected to rough forging, medium forging, and finish forging in order by the impact of a ram, thereby forging into a predetermined shape.

[0003]

In the case of forging with an air stamp hammer, a metal material is supplied to a roughing die, a medium processing die, and a finishing die in this order.
In each mold, the metal material must be forged by hitting the ram, and there is a problem that the working efficiency is poor.

[0004] A method of forging into a predetermined shape by passing a metal material a plurality of times between a pair of rolls has also been practiced. In this case, too, the metal material passes between a plurality of rolls. And the work efficiency is poor.

The present invention is to solve such a conventional problem, and an object of the present invention is to press a metal material simultaneously from an opposing portion on both sides toward an axial center portion to efficiently form the metal material into a predetermined shape. An object of the present invention is to provide a forging device capable of forging.

[0006]

According to the forging apparatus of the present invention, a material insertion hole into which a metal material to be forged is inserted is provided in an axial center portion, and at least a pair of ram guide holes opposed to each other are provided. A ram frame inserted in the radial direction so as to communicate with the material insertion hole, and slidably inserted into each ram guide hole so as to be able to advance into the material insertion hole of the ram frame; A ram urged in the outer peripheral direction of the ram frame in the guide hole, and each ram is arranged in each ram guide hole so as to slide integrally with the ram, and the ram frame is biased by the urging force on each ram. A cam follower adapted to protrude outward from an outer surface, and rotatably fitted to the ram frame in a concentric manner; At two opposing positions, a cylindrical cam wheel provided with a cam surface for pressing each cam follower so that each ram can advance into the material insertion hole from each ram guide hole. I do.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a plan sectional view showing an example of an embodiment of a forging apparatus according to the present invention, and FIG. 2 is a sectional view taken along line AA in FIG. This forging device has a cylindrical cam wheel 12 rotatably arranged in a frame 11 and a cylindrical ram frame 13 fixedly provided concentrically in the cam wheel 12. .

The frame 11 has a cylindrical frame main body 11a in which the cam frame 12 is housed, and a shaft support 11b provided to project laterally from the frame main body 11a. I have. The frame body 11a has an open top surface and a horizontal bottom surface 11c at an appropriate height from the lower end. On the bottom surface 11c, the ram frame 13 is concentric with the frame body portion 11a. It is fixed at. Also, the bottom part 11
At the center of c, a circular opening 11d (see FIG. 2) is provided.

The lower end of the rotating shaft 14 which is in a vertical state is rotatably supported by the shaft supporting portion 11b of the frame 11. The rotating shaft 14 is provided with a gear 14a on an upper outer peripheral surface continuous with a lower end of the rotating shaft 14 supported by the shaft supporting portion 11b. The shaft support 11b and the frame main body 11a
Are in communication with each other, and the gear 14a
Are exposed from the shaft support 11b to the frame body 11a.

The cylindrical cam wheel 12 housed in the frame main body 11a is rotatably supported on the upper part of the ram frame 13 by bearings 16 (see FIG. 2). At two positions facing each other on the inner peripheral surface of the cam wheel 12, a cam surface 12b located on the center side from the inner peripheral surface of the cam wheel 12, as shown in FIG.
Each is provided. The cam surfaces 12b are opposed to each other with the axis of the cam wheel 12 interposed therebetween, and are flat surfaces parallel to the tangential direction of the cam wheel 12, respectively.

The outer peripheral surface of the cam wheel 12 is concentric with the inner peripheral surface of the frame main body 11a with a slight gap therebetween, and a gear 12a is provided on the outer peripheral surface over the entire periphery. I have. The gear 12a is moved from the shaft supporting portion 11b of the frame 11 to the frame main body 11a.
Meshes with the gear 14a of the rotating shaft 14 exposed to the side.

A material insertion hole 13a penetrating in the vertical direction is provided in the axial center of a cylindrical ram frame 13 concentrically arranged in the cam wheel 12. The material insertion hole 13a communicates with an opening 11d provided in the bottom surface 11c of the frame main body 11a. Four ram guide holes 13b extending radially from the outer peripheral surface of the ram frame 13 to the material insertion holes 13a are horizontally inserted at equal intervals in the circumferential direction. Each ram guide hole 1
3b has a circular cross section, and the inner diameter is reduced in three stages from the outer peripheral surface side of the ram frame 13 to the material insertion hole 13a side. Therefore, each ram guide hole 13b is provided with a large-diameter portion having the largest inner diameter in the vicinity of the outer peripheral surface of the ram frame 13, and an intermediate portion slightly smaller in inner diameter than the large-diameter portion is adjacent to the inner peripheral side. Further, a small-diameter portion having the smallest inner diameter is adjacent to the intermediate portion.

A cylindrical ram 15 is slidably inserted into each ram guide hole 13b. Each ram 15 has an outer diameter of a side portion located on the outer surface side of the ram frame 13 substantially equal to an inner diameter of an intermediate portion between a large diameter portion and a small diameter portion in each ram guide hole 13b, and a material insertion hole 13a.
The outer diameter on the side is substantially equal to the inner diameter of the small diameter portion in each ram guide hole 13b. Each ram 15 slides in each ram guide hole 13b so that an end of the ram frame 13 on the side of the material insertion hole 13a provided in the axial center portion can enter the material insertion hole 13a. I have. Further, the end face of each ram 15 on the side of the material insertion hole 13a is in a state of being depressed in an arc shape along the vertical direction.

As shown in FIG. 2, an air supply hole 13f communicating with an intermediate portion of each ram guide hole 13b is provided at a lower portion of the ram frame 13. Each of the air supply holes 13f communicates below the ram frame 13, so that compressed air is supplied into each of the air supply holes 13f. The compressed air supplied to each air supply hole 13f is supplied into each ram guide hole 13b, and the ram 15 fitted into each ram guide hole 13b is provided.
Is urged toward the outer surface of the ram frame 13.

A roller-shaped cam follower 17 is vertically fitted to a large diameter portion of each ram guide hole 13b located on the outer surface side of the ram frame 13. Each of the cam followers 17 can slide along the axial direction of each of the ram guide holes 13b within the large diameter portion of each of the ram guide holes 13b.
Each ram 15 urged toward the outer surface of the ram frame 13 by compressed air supplied from the 3 f into each ram guide hole 13 b is fitted on the outer peripheral surface of each cam follower 17. The respective cam followers 17 are pressed against the inner peripheral surface of the cam frame 12 by the respective rams 15 urged by the compressed air, and come into rolling contact with the inner peripheral surface of the cam frame 12 when the cam frame 12 is rotated. .

The frame body 11 of the frame 11
The motor 20 is vertically mounted on the outer peripheral surface of the portion a. The output shaft 21 of the motor 20 projects upward from the upper surface of the frame 11, and the output shaft 2
1, a pulley 22 is attached so as to rotate integrally with the output shaft 21.

As shown in FIG. 2, the rotating shaft 1 vertically supported by the shaft support portion 11b of the frame 11 is provided.
In the middle of 4, a flywheel 18 is rotatably fitted. Further, a clutch mechanism 19 for transmitting and blocking the rotation of the flywheel 18 to and from the rotation shaft 14 is attached to the upper end of the rotation shaft 14. The rotational force of a motor 20 attached to the frame 11 is applied to the flywheel 18 by an output shaft 21 of the motor 20.
Is transmitted via a transmission belt 23 wound between a pulley 22 attached to the flywheel 18 and the flywheel 18. The rotation of the flywheel 18 is transmitted to the rotating shaft 14 via the clutch mechanism 19.

In the forging device having such a configuration, the metal material to be forged is formed by the material insertion hole 13 of the ram frame 13.
a, which is chucked by a chuck mechanism (not shown) and inserted from above, and is supported vertically in the material insertion hole 13a. When the metal material is inserted into the material insertion hole 13a, the motor 20 is driven to rotate, and the clutch mechanism 19 is brought into the power transmission state,
The rotation of the motor 20 is controlled by the pulley 22 and the transmission belt 2.
3, via flywheel 18 and clutch mechanism 19,
The power is transmitted to the rotating shaft 14 and the rotating shaft 14 is rotated. The rotation of the rotating shaft 14 is performed by rotating the rotating shaft 1.
Gear 1 of the cam frame 12 meshed with the gear 14a of No. 4
By 2a, it is transmitted to this cam frame 12, and the cam frame 12 is rotated.

At this time, the compressed air is supplied into each air supply hole 13f of the ram frame 13, and the ram guide hole 1 of the ram frame 13 is supplied from each air supply hole 13f.
The ram 15 in each ram guide hole 13b is urged toward the outer surface of the ram frame 13 by the compressed air supplied to the inside of the ram guide hole 13b. Therefore, the cam followers 17 fitted in the respective ram guide holes 13b are used to
5, the cam frame 12 is pressed against the inner peripheral surface of the cam frame 12.

When the cam frame 12 is rotated in such a state, the cam follower 17 pressed against the inner peripheral surface of the cam frame 12 rotates while being in contact with the inner peripheral surface of the cam frame 12. When the cam follower 17 comes into contact with the cam surface 12a of the cam frame 12, the cam follower 17
The ram 15 integrally fitted with the cam follower 17 is pushed out into the material insertion hole 13 a of the ram frame 13. As a result, the material inserted into the material insertion hole 13a is pressed by the distal end surfaces of the respective rams 15 on the opposing portions on both sides.

Thereafter, when the cam frame 12 is rotated and the contact between the cam surface 12b and the cam follower 17 is released, the ram 15 urged by the compressed air slides toward the outer surface of the ram frame 13. And a cam follower 17 integrated with the ram 15 while retreating from the material insertion hole 13a into the ram guide hole 13b.
Also slides in the ram guide hole 13 b and is pressed against the inner peripheral surface of the cam frame 12.

In this manner, the metal material inserted into the material insertion hole 13a of the ram frame 13 is such that the portions whose phases are shifted by 90 degrees are opposite to each other with the phases shifted by 90 degrees. The opposing portions on both sides are alternately pressed by the ram 15. By repeating such an operation for an appropriate time, the metal material inserted into the material insertion hole 13a is forged.

For example, when a metal material 30 having a circular cross section as shown in FIG. 3A is forged into a shape as shown in FIGS. 3B and 3C, the material of the ram frame 13 is used. After the metal material is inserted into the insertion hole 13a and held by the chuck mechanism, and the cam frame 12 is rotated and forged for an appropriate time, the rotation of the cam frame 12 is temporarily stopped by the clutch mechanism 19, and the material insertion hole 13a is stopped. The metal material 30 forged by each ram 15 by displacing the metal material 30 in the axial direction with respect to
What is necessary is just to change the part of 0. As a result, the metal material 30 having a circular cross section has a state in which a pair of rectangular cross sections having different thicknesses are continuously provided as shown in FIG. 3B, or as shown in FIG. Then, it is preformed into a state having a step between a pair of rectangular cross sections.

When the metal material is forged into a thin circular cross section, the material insertion hole 13a of the ram frame 13 is used.
After the metal material is inserted into the ram frame 13 and forged into a rectangular shape, the metal material inserted into the material insertion hole 13a of the ram frame 13 is rotated by 45 degrees, and the forged portion is turned 90 degrees. The portions that are only out of phase may be forged by a pair of rams 15 facing each other. When the outer peripheral surface of the metal material is forged into a smooth peripheral surface, the metal material inserted into the material insertion hole 13a is rotated by an appropriate angle to shift the forged portion in the circumferential direction. You just need to do it.

Since the rotation speed of the cam frame 12 can be changed by changing the rotation speed of the motor 20, the hardness of the metal material to be forged, the thickness of the portion to be forged, etc. May be set appropriately according to the conditions.

The material insertion hole 13 of the ram frame 13
The chuck mechanism for holding the metal material inserted into the
It may be configured to be able to rotate precisely by a predetermined angle. Further, the forged metal material is released from the holding by the chuck mechanism, so that the ram frame 1 is released.
Alternatively, the material may be dropped from the material insertion hole 13a and discharged. In this case, conveyance of the forged metal material to the next step can be easily automated.

[0028]

As described above, according to the forging apparatus of the present invention, the rams in the respective ram guide holes provided in the ram frame along the radial direction by the rotation of the cam wheel are inserted into the material insertion holes of the ram frame. Since the metal material inserted into the material insertion hole is forged, the opposing parts on both sides of the metal material are forged at the same time, so vibration generated during forging is possible as much as possible. And the efficiency of the forging operation is significantly improved because the processing energy is effectively used.

[Brief description of the drawings]

FIG. 1 is a plan sectional view showing an example of an embodiment of a forging device of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3A is a perspective view of a metal material forged by the forging device, and FIGS. 3B and 3C are perspective views showing states of the metal material forged.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Frame 12 Cam wheel 13 Ram frame 13a Material insertion hole 13b Ram guide hole 14 Rotating shaft 16 Bearing 17 Cam follower 18 Flywheel 19 Clutch mechanism 20 Motor 22 Pulley 23 Transmission belt

Claims (1)

[Claims] 1. A material insertion hole into which a metal material to be forged is inserted is provided in an axis portion, and at least a pair of ram guide holes facing each other are radiated so as to communicate with the material insertion hole. A ram frame that is inserted in the direction of the ram frame, and is slidably inserted into each ram guide hole so as to be able to advance into the material insertion hole of the ram frame. The rams respectively urged and the rams are arranged in the respective ram guide holes so as to slide together with the rams, so that the rams can be pushed outward from the outer surface of the ram frame by the urging force on the rams. The ram is rotatably fitted to the ram frame in a concentric manner, and each ram is positioned at two positions on the inner peripheral surface thereof facing each other. A cylindrical cam wheel provided with a cam surface for pressing each cam follower so that the cam follower can advance from the guide hole into the material insertion hole.