JP2739707B2 - Multistage forging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forging machine for transferring a material stepwise over a plurality of forging stations each having a die and a punch, and for forming the material from coarse to fine. The present invention relates to a method in which the orientation of the material is changed during the course of forming from coarse to fine and forging is performed.

[0002]

2. Description of the Related Art As shown in FIG. 20, a die forging machine for forming bolts, nuts and other various parts is usually provided with a die block 3 at a predetermined position on a machine base 2 and a plurality of die blocks 3 are mounted on the die block 3. The dies (81-84) are attached, and the same number of punches as the dies (81-84) are arranged on a ram (not shown) moving back and forth toward these dies (81-84). A plurality of forging stations composed of punches are formed, and a bar-shaped material cut to a predetermined length is punched into a die by a punch at each forging station to process the material, and the material is transferred to the former forging station by chucks 90 to 95 for material transfer. The processed material is grasped and sent to a subsequent forging station. Therefore, the use of such a press forming machine enables mass production of the above parts.

[0003]

In the case of manufacturing a shaft body X having a shaft portion a and a ring-shaped head b at one end of the shaft portion a as shown in FIG. As shown, an intermediate material X3 having a shaft portion a and a spherical head d formed at one end of the shaft portion a is formed, and the spherical head d is flattened, and then the head d is punched in a ring shape. However, it has been difficult to consistently manufacture the shaft body X having such a ring-shaped head portion b from a material by the above-described forging machine. That is, since the direction in which the material is driven into the die by the punch is the direction of the arrow (horizontal direction) in FIG. 22, that is, the axial direction of the material, even if the spherical head d can be formed by forging, the spherical head d In order to deform d flat by a punch and a die, or to subsequently punch it out in a ring shape, for example, the above-mentioned spherical head d is on top, and the shaft portion a is perpendicular to the direction in which the material is driven by the punch. This is because it is necessary to change the posture of the material X3, and this cannot be performed by the conventional forging machine. Therefore, the flattening and the ring-shaped punching of the spherical head d have to rely on press working. Production was hindered.

Therefore, a main object of the present invention is to transfer a material stepwise over a plurality of forging stations so that when the material is formed from coarse to fine, the posture of the intermediate material can be changed during the forming. And forming an intermediate material having a shaft portion and a head at one end of the shaft portion from the material, changing the posture of the intermediate material from a horizontal state to an upright state, and with respect to the head of the intermediate material whose posture has been changed. It is an object of the present invention to provide a multi-stage press forming machine capable of continuously performing press forming.

It is another object of the present invention to hold an intermediate material that has been changed to an upright position and protruded out of a die without changing the position of the intermediate material. The purpose of the present invention is to provide a multi-stage forging machine capable of securely grasping and then accurately feeding the forging station of the subsequent stage, and another purpose is to provide an intermediate material before and after the posture change. Providing a multi-stage forging machine that can keep the overall structure of the forging machine from becoming complicated while having a structure that changes the attitude of the intermediate material to an upright state by making the height of the head the same height What you want to do.

Another object is to change the posture of a shaft and an intermediate material having a head at one end of the shaft from a horizontal state to a standing state during molding by a plurality of forging stations. The head of the changed intermediate material can be continuously subjected to the forging process to form a shaft having a desired shape, while the shaft in the upright state can be changed to the horizontal state again, An object of the present invention is to provide a multi-stage press forming machine capable of continuously forming a thread groove on an outer periphery of a shaft portion of a shaft body whose posture has been changed to a horizontal state.

[0007]

Means for Solving the Problems In order to achieve the above object, the present invention is characterized in that it is configured as follows.

[0008] That is, the invention according to claim 1 of the present application (hereinafter referred to as the first invention) transfers a material stepwise over a plurality of forging stations each having a die and a punch, thereby forming a shaft and the shaft. A multi-stage forging machine for molding an intermediate material having a head formed at one end of a shaft portion, and for processing the head of the intermediate material from a direction perpendicular to the length direction of the intermediate material, A station for changing the material orientation is provided between the plurality of forging stations.On the front side of the die at the material orientation changing station, the intermediate material formed by the forging station up to the previous stage is axially moved by the punch. Pushing means is provided for pushing in the same direction as the driving direction and from the shaft portion side to the die side, and a pushing means is provided on the die side of the material posture changing station by the pushing means. A pair of rotating bodies for holding the shaft portion of the inserted intermediate material from both sides and holding, and rotating both rotating bodies by 90 degrees after pushing, so that the shaft portion of the intermediate material is orthogonal to the material driving direction by the punch. And a protruding means for projecting the intermediate material, which has been erected in accordance with the retraction of the pushing means after pushing the intermediate material, to the die front side from between the two rotating bodies in the standing posture. It is characterized by.

The invention according to claim 2 (hereinafter referred to as the second invention) is characterized in that, in addition to the structure of the first invention, a pair of rotating bodies are provided on the front surface side of the die in the attitude changing station by projecting means. A receiving surface for receiving the intermediate material protruding from the space between the die and the projecting surface of the protruding means; And a retreat position on the front side of the die.

The invention according to claim 3 (hereinafter, referred to as a third invention) is characterized in that, in addition to the structure of the first invention or the second invention, an intermediate material is pushed between a pair of rotating bodies by pushing means. The holding position of the head with respect to the rotation center of both rotating bodies in the intermediate material when held, and the head of the intermediate material when changing the intermediate material to the upright posture by rotating both rotating bodies by 90 degrees. It is characterized in that it is provided at a relational position that is the same height as the height position with respect to the rotation center of both rotating bodies.

The invention according to claim 4 (hereinafter, referred to as a fourth invention) is to transfer a material stepwise over a plurality of forging stations each having a die and a punch, thereby forming a shaft portion and the shaft. A multi-stage forging machine for forming an intermediate material having a head formed at one end of a portion and processing the head of the intermediate material from a horizontal direction perpendicular to a length direction of the intermediate material. Between the plurality of forging stations, changing the attitude of the intermediate material formed and processed at the preceding forging station from a horizontal state to an upright state, and
A first material posture changing station for projecting the intermediate material changed to the standing posture toward the front side of the die in an upright state, and the intermediate material changed to the standing posture is provided at a subsequent stage of the first material posture changing station; The head of the material is provided with a forging station for performing processing from a direction perpendicular to the length direction of the intermediate material, while, at the subsequent stage of the final forging station, the posture of the final molded product formed at the final forging station is raised from the standing state. A second material posture changing station that changes the horizontal state and projects the final molded product that has been changed to the horizontal posture to the front side of the die in a horizontal posture, and a horizontal posture at a rear side of the second material posture changing station. A rolling station provided with a thread rolling die for forming a thread groove on the outer periphery of the shaft portion of the final molded product whose posture has been changed is continuously provided.

According to a fifth aspect of the invention (hereinafter referred to as a fifth aspect of the invention), in addition to the configuration of the fourth aspect of the invention, the first material attitude changing station includes a die in the first material attitude changing station. Pushing means for pushing the intermediate material into the die from the shaft in the same horizontal direction as the direction in which the material is driven by the punch, and pushing means provided on the die side of the first material attitude changing station. And a pair of rotating bodies for holding the intermediate material pressed in from both sides, and rotating both the rotating bodies by 90 degrees after the pressing so that the shaft of the intermediate material is orthogonal to the material driving direction by the punch. The driving means for erecting, and the intermediate material erecting with the retraction of the pushing means after the intermediate material is pushed, protrudes toward the die front side from between the two rotating bodies in the erecting posture. A second material attitude changing station is provided on the die-side front surface of the second material attitude changing station, and the final molded product formed by the final forging station is raised. Pressing means for pressing the die toward the die side, and a pair of rotating bodies provided on the die side of the second material posture changing station and holding and holding the final molded product pressed by the pressing means from both sides, After the pushing, both the rotating bodies are rotated by 90 degrees, and the final molded product is tilted so that the shaft portion thereof is in the same direction as the material driving direction by the punch. With the retraction of the pushing device after the final molded product is pushed, And a projecting means for projecting the upright finished molded product to the die front side from between the two rotating bodies in the horizontal posture.

[0013]

According to the above arrangement, the following operation can be obtained.

According to the first aspect of the invention, for example, when manufacturing a shaft having a shaft and a ring-shaped head at one end of the shaft, a head forming station up to the preceding stage of the material posture changing station is used. After shaping the shaft and an intermediate material having a head formed at one end of the shaft, at this material posture changing station, the pressing means presses the intermediate material so that its axial direction is the same as the punching direction of the punch and The intermediate material is pushed into the die from the shaft portion side, and the pushed-in intermediate material is sandwiched and held from both sides by a pair of rotating bodies.
After rotating the intermediate material by 0 degrees to raise the intermediate material so that the axis thereof is perpendicular to the material driving direction of the punch, the intermediate material can be projected out of the die from between the two rotating plates by the protruding means. Thereby, the intermediate material is transferred to the subsequent forging station in a state where the posture has been changed to the standing posture, and in the subsequent forging station,
The head is subjected to forging and deformed flat, and then punched in a ring shape, whereby the above-mentioned shaft can be manufactured in an integrated manner.

According to the second aspect of the present invention, the intermediate material protruded from between the two rotating bodies by the protruding means is provided on the receiving surface of the holding means located on the front side of the die of the attitude changing station, and on the surface of the protruding means. The intermediate material is clamped by the protruding surface and is held in the standing posture, so that the intermediate material is reliably grasped by the material transfer chuck in the state of being clamped in the standing posture. It will be accurately sent to the subsequent forging station.

According to the third aspect, when the posture of the intermediate material is changed in the material posture changing station,
When the shaft portion of the intermediate material is pushed and held between the pair of rotating bodies by the pushing means, the height of the head of the material with respect to the rotation center of both rotating bodies, and the both rotating bodies are 90
When the intermediate material is changed to the upright posture by rotating the head, the height of the head of the material with respect to the rotation center of the two rotating bodies becomes the same height, whereby the upright posture protruded from the inside of the die by the protruding means. The center of the head of the intermediate material and the center of the punch in the forging station up to the previous stage of the material posture changing station can be made to coincide with the same height. Therefore, after the posture is changed by the material posture changing station, when the head of the intermediate material is flattened or a hole is punched in the flattened head at the subsequent forging station, the position changing station or the subsequent position is used. The center of the punch and the die in the forging station can be unified to the same height as the center of the punch and the die in the forging station up to the preceding stage of the material posture changing station. As a result, the material posture changing station S4 Despite the structure provided, it is possible to suppress the structure of the entire forging machine from becoming complicated.

Further, according to the fourth and fifth inventions, for example, a shaft body such as an eyebolt having a shaft portion, a ring-shaped head at one end of the shaft portion, and a thread groove on the outer periphery of the shaft portion is manufactured. In such a case, the first material posture changing station pushes the shaft member and the intermediate material having a head at one end of the shaft portion in the forging station up to the previous stage in the same manner as the operation of the first invention described above. The means, the pair of rotating bodies, the driving means of the rotating bodies, and the protruding means make it possible to rotate the body 90 degrees from a horizontal state to an upright state, and then to protrude the intermediate material out of the die. As a result, the intermediate material is transferred to the subsequent forging station in a state where the posture has been changed to the upright posture, and at the subsequent forging station, the head is subjected to forging and deformed flat, and then the ring shape is formed. Thus, the above-mentioned shaft body can be formed into a shaft body. After that, the second posture changing station causes the shaft body in the upright state by the operation opposite to that of the first posture changing station to be pushed by the pushing means, the pair of rotating bodies, the driving means of the rotating body, and the projecting means. The shaft is rotated 90 degrees from the standing state to the horizontal state, the posture of the shaft body is changed to the horizontal state again, and a thread groove is formed on the outer periphery of the shaft portion of the shaft body changed to the horizontal state by rotary thread rolling. The die can be formed continuously. As a result, a shaft body such as an eyebolt having a ring-shaped head and having a thread groove on the outer periphery of the shaft portion can be integrally manufactured by a single forging machine, and mass production of the shaft body is possible. Becomes

[0018]

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

FIGS. 1 and 2 show a multi-stage press-forming machine for manufacturing a shaft X having a shaft portion a and a ring-shaped head b at one end of the shaft portion shown in FIG. 1, a die block 3 is disposed at a predetermined position of a machine base 2, and dies 11 to 16 are arranged side by side at a predetermined interval on the die block 3 as shown in FIG. The die block 3 is mounted on the machine base 2 in front of the die block 10.
In front of the ram 4 moved back and forth, each die 1
By mounting a plurality of punches 21 to 26 corresponding to 1 to 16, a plurality of forging stations S1 to S4 each including each die 11 to 16 and a punch 21 to 26.
In step S6, the material is sequentially driven into the respective dies in the respective forging stations S1 to S6 by the advance of the ram 4, and forging is performed. The rear end of the ram 4 is connected via a connecting member 8 to a crankshaft 7 integrally provided with a flywheel 6 rotated by a drive motor 5 of the head forming machine 1. The ram 4 moves back and forth toward the die block 3 via the connecting member 8 by the driving of the ram 5. In addition, these forging stations S1, S2, S3, S
The transfer of the material between S5 and S6 is sequentially performed by material transfer chucks 9a to 9f schematically shown in FIG.

Then, as shown in FIG. 1, at the first stage forging station S1, a bar-shaped material cut to a predetermined length is hit by a die 11 and a punch 21, and the material is cut from the material. An intermediate material X1 having a shaft portion a and a large-diameter portion c formed at one end thereof is formed, and the large-diameter portion c is hit by a die 12 and a punch 22 at the next second-stage forging station S2. An intermediate material X2 in which the large diameter portion c is further shaped is formed. These first stage and 2
The processing by the forging stations S1 and S2 at the first stage is for forming an intermediate material X3 having a shaft portion a and a spherical head d at one end of the shaft portion a as shown in FIG. In the preforming process, the large diameter portion P is further hit by the die 13 and the punch 23 in the next third stage forging station S3 to form the intermediate material X3 in which the spherical head d is formed. You.

The fourth station S4 is an intermediate material X3.
The intermediate material X3 driven by the punch 24 does not contribute to the forming process of
The shaft portion a is a material posture changing station for changing the posture to an upright posture orthogonal to the material driving direction of the punch 24. The material posture changing station S4 includes the die block 3 as a material posture changing die 14. The rotation unit 30 is provided detachably.

As shown in FIGS. 3 to 8, the rotating unit 30 includes a pair of rotating bodies 3 rotatable about a horizontal axis perpendicular to the direction in which the material is driven by the punch 24.
2, 32 are provided in the unit case 31,
The holding plates 3 are provided on the facing surfaces of the rotating bodies 32 and 32.
The intermediate material X3 having the spherical head d is held between the holding plates 33, 33 from the horizontal direction by the punch 24 in the horizontal posture. In that case, as shown in FIG.
The holding plates 33, 33 are attached via bolts 34, 34 so as to be movable in a predetermined range in the axial direction of the rotating bodies 32, 32, and the rotating bodies 32, 32 and the holding plates 33, 3
3, recesses 32a, 33a are formed at upper and lower positions of the bolts 34, 34, respectively, on a surface opposed to the bolt 3, and opposed to each other.
A sleeve 35 and a spring 36 penetrating the sleeve 35 are interposed between the recesses 32a, 33a, and the holding plates 33, 3 are provided by the springs 36, 36.
When the intermediate material X2 is driven by the punch 24, the material X3 is held between the holding plates 33, 33 by the force of the springs 36, 36. It is configured to:

Gears 32b, 32b are formed on the peripheral surfaces of the rotating bodies 32, 32, respectively.
Racks 37, 37 are engaged with b, 32b.
That is, as shown in FIGS.
A pair of rack bodies 37, 37 are supported so as to be vertically movable, and drive means 40 for vertically moving these rack bodies 37, 37 are connected to the rack bodies 37, 37. By vertically moving the bodies 37, 37, the holding plate 3
3 and 33 are reciprocally rotated by 90 degrees, and the intermediate material X3 driven between the holding plates 33 and 33 by this rotation is shown by a virtual line in FIG. 5 from a horizontal posture shown by a solid line in FIG. The configuration is such that the spherical head d is up and the shaft portion a is in an upright posture orthogonal to the material driving direction by the punch 24.

FIGS. 7 and 9 show the driving means 40.
As shown in FIG. 2, a bell crank 43 is provided from a rack drive cam 42 provided at one end of a drive shaft 41 provided with a material transfer chuck opening / closing cam 41a provided on the machine base 2.
And a linking arm 44 for interlocking connection with a rotating shaft 45, on which a lifting lever 46 for lifting and lowering each rack body 37 is fixedly provided. And the drive shaft 4
As shown in FIG. 2, a transmission shaft 47 which is linked to the crankshaft 7 for moving the ram 4 forward and backward is linked to the crankshaft 7 via linking means such as a bevel gear, and the drive shaft 41 is linked to the crankshaft 7 as shown in FIG. It is to be rotated. As a result, the rack bodies 37, 37 are moved up and down in synchronization with the forward and backward movement of the ram 4, that is, the rotating bodies 32, 32 are rotated in synchronization with the forward and backward movement of the ram 4, and after the material is driven by the punch 24, the rotating bodies are rotated. 32, 32 are rotated at a predetermined timing.

In the embodiment shown in FIG.
A holding portion 33b for receiving and holding a part of the spherical head d of the intermediate material X3 driven by the punch 24 on opposing surfaces of the holding members 33 and 33;
Further, guide grooves 33c, 33c are provided for guiding the spherical head d of the intermediate material X3 when the intermediate material X3 is projected from the holding plates 33, 33 to the outside of the rotary unit 30. And the holding parts 33b, 33b to the holding plates 33, 33
5, the height of the spherical head d in the intermediate material X3 with respect to the center of rotation of the rotating bodies 32, 32 when pressed by the punch 24 and held between the holding plates 33, 33 as shown in FIG. Position and the rotating bodies 32
The spherical head d is provided at a position where the height position with respect to the rotation center of the rotating bodies 32, 32 when the intermediate material X3 is changed to the standing posture by rotating the intermediate material X3 at the same height position.
That is, as shown by a dashed line in FIG.
The center of the spherical head d is set so as to be located on an extension of 45 degrees with respect to a horizontal line from the rotation centers of 2, 2 to the ram side. Therefore, the intermediate material X having the spherical head d formed at the third forging station S3
3 is a holding plate 3 in the position changing station S4.
3 and 33, the material X3 is held between the holding plates 33 and 33 in a horizontal posture as shown by a solid line in FIGS. The rotating bodies 32, 32 are rotated via the body 37, and the intermediate material X3 stands up with its spherical head d upward and the shaft part a perpendicular to the driving direction of the punch 24 as shown by the phantom line in FIG. The posture will be changed to the posture.

Further, the material posture changing station S4 is provided with a knockout pin 38 for projecting the intermediate material X3 whose posture has been changed out of the rotary unit 30. As shown in FIG. 8, the knockout pin 38 has a stepped protruding surface 38a conforming to the shape of the intermediate material X3 so that the intermediate material X3 after the posture change can be protruded while standing. After the posture of X3 is changed, the holding plate 3 is held in a state where the punch 24 is retracted.
3 and 33, and the intermediate material X3 is inserted into the guide groove 33.
c and 33c so as to protrude out of the rotary unit 30. As a result, in the station S4 of the fourth stage, the intermediate material X3 is protruded so that the spherical head d faces upward and the center of the spherical head d coincides with the center of the punch 24. In this standing position, the workpiece is gripped by the material transfer chuck 9d and is carried into the next fifth-stage forging station S5.

Then, as shown in FIG. 1, at the fifth forging station S5, forging is performed on the spherical head d of the intermediate material X3 by the die 15 and the punch 25, and the spherical head d is flattened. The formed intermediate material X4 is formed, sent to the final stage forging station S6 in that state, and a hole is punched out from a flattened head by a punching punch 26a incorporated in the punch 26, as shown in FIG. A shaft body X having a ring-shaped head b at one end of a shaft portion a is manufactured. The punched piece f in that case is discharged through the discharge passage 16a in the die 16.

The dies 11 to 13, 15 and 15 in the first to third and fifth stage forging stations S1 to S3 and S5, respectively.
Are provided with knockout pins 11a, 12a, 13a and 15a for punching a material from these dies as the punches 21 to 23 and 25 after processing are retracted.
Similarly, knockout pins 2 are provided on the punches 21, 22, and 25.
1a, 22a and 25a are provided.

As described above, the dies 11, 12, 13 and the punches 2 are formed in the first to third stages of forging stations S1 to S3.
The material is hit in the horizontal direction by 1, 22, 23 to form an intermediate material X3 having a shaft portion a and a spherical head d formed on the shaft portion a, and then the material is changed at a material posture changing station S4. The posture of the intermediate material X3 is changed from the horizontal state to the standing state so that the spherical head d is at the top, and the spherical head d is flattened by continuously forging at the subsequent forging stations S5 and S6. Since the flattened head e is punched out in a ring shape, a shaft X having a ring-shaped head b can be manufactured by a pressure forming machine, and mass production of the shaft X is performed. Becomes possible.

When the attitude of the intermediate material X3 is changed in the material attitude changing station S4, the formation positions of the holding portions 33b, 33b in the holding plates 33, 33 are adjusted so that the shaft portion a of the intermediate material X3 is And the height of the spherical head d of the material X3 when pressed and held between the holding plates 33, 33 with respect to the centers of the rotating bodies 32, 32, and rotating the rotating plates 32, 32 by 90 degrees to form an intermediate material. Since the height of the spherical head d of the material X3 with respect to the rotating bodies 32 when the X3 is changed to the standing posture is provided at the same height, the knockout pin 38 protrudes from the inside of the rotating unit 30. With the center of the spherical head d of the intermediate material X3 in the standing posture
It is possible to make the center of the punch in the forging station up to the former stage of the material posture changing station S4 coincide with the same height. Therefore, after the posture is changed by the material posture changing station S4, when the head of the intermediate material is flattened or a hole is punched in the flattened head e in S5 and S6 in the subsequent forging station. The center of the punches 25 and 26 and the dies 15 and 16 in the forging stations S5 and S6 after the material posture changing station S4 is moved to the material posture changing station S4.
4, punches 21 at the forging station up to the previous stage,
It is possible to set them at the same height as the centers of the dies 22, 23 and the dies 11, 12, 13. As a result, the center of the punches and dies in all the forging stations can be unified at the same height while having the structure including the material posture changing station S4, and the structure of the entire forging machine can be prevented from becoming complicated. It becomes possible.

In the present embodiment, as shown in FIGS. 8 and 10, the rotating body 32,
At a position in front of 32, a holding means 50 is provided for holding the intermediate material X3 protruded from between the rotating bodies 32, 32 by the knockout pin 38 while maintaining its posture changed state.

As shown in FIG. 8, the holding means 50
A holding member 51 having a receiving surface 51a for receiving the spherical head d and the shaft portion a of the intermediate material X3, a support member 52 for supporting the base of the holding member 51, and the support member 52 is slidable in the front-rear direction. A movable body 53 having a U-shape in plan view having a support portion 53a for supporting the movable body 53, and the movable body 53 is slidably supported on the front side in the left-right direction.
And a guide rod 56 that is parallel to the base shaft 55 and that supports a rear portion of the moving body 53 slidably in the left-right direction. Then, as shown in FIG. 10, the base shaft 55 is horizontally traversed on the lower front part of the die block 3 so as to be able to reciprocate in the left-right direction. The lower end of the bell crank 58 is connected, and the upper end of the bell crank 58 is in contact with a base shaft driving cam 59 fixed to a predetermined portion of the transmission shaft 47. Accordingly, the bell crank 58 swings due to the rotation of the base shaft driving cam 59 with the rotation of the transmission shaft 47 interlocked with the crank shaft 7, and the base shaft 55 reciprocates at a predetermined interval. The movable body 53 and the support body 52 are reciprocated in the left-right direction via a swing arm 54 provided on a base shaft 55, and the clamping 51 supported by the support body 52 is in front of the rotary unit 30 of the posture changing station S4. It is reciprocated between the position and the standby position on the side of the rotary unit shown in FIG. On the other hand, on the outer circumference of the other end of the base shaft 55,
A spline is formed, and a base pivot lever 60 is fitted to the spline. The lever 60 is connected to a swing lever 62 that swings by a base pivot cam 61 provided at an end of the drive shaft 41. When the cam 61 for rotating the base shaft by the driving shaft 41 rotates, the lever 60 for rotating the base shaft rotates through the swinging lever 62, whereby the holding body 51 is positioned on the front surface of the rotating unit 30. When the base shaft 55 is rotated by a predetermined angle,
The holding body 51 is swung in a separating direction from the front surface of the rotating unit 30 at a predetermined timing, and the holding operation of the intermediate material X3 is performed.

Therefore, the intermediate material X3 protruding out of the rotary unit 30 by the knockout pin 38 is
A receiving surface 51a of the holding body 51 located on the front surface of the rotating unit 30; and a projecting surface 38a of the knockout pin 38
It will be pinched while maintaining its standing posture with
Under this sandwiching state, the intermediate material X3 is reliably grasped by the material transfer chuck 9d, and the forging station S in the subsequent stage is formed.
6 will be accurately sent.

In the above embodiment, a ring-shaped head b is attached to the shaft body X.
Is described, but the production of the product may be terminated in the crushing step of the spherical head d in the fifth forging station, and in addition, the spherical head d and the shaft portion a Another forging process or the like may be added.

Further, a shaft body X such as an eyebolt having a ring-shaped head b and a thread groove g on the outer periphery of the shaft portion a is
FIG. 1 shows an integrated production by one forging machine 1.
As shown in FIG. 2, after the sixth forging station S6 shown in the above-described embodiment, as a seventh-stage station S7, a second material posture changing station for changing the standing body X to the horizontal posture again. S7 is a station S8 of the eighth stage, and a rotary screw roller of a rotary type that forms a thread groove g on the outer periphery of the shaft portion a of the shaft body X whose posture has been changed to the horizontal posture at the second material posture changing station S7. Die 6
5 may be connected in series.

In this case, as shown in FIG. 12, the sixth forging station S6 has a discharge passage for discharging the punched pieces f into the die 16 in the sixth forging station S6 of the above-described embodiment. A knockout pin 16b for opening the shaft 16a and projecting the formed shaft body X out of the die 16 is provided. The second material posture changing station S7 has the same structure as that of the material posture changing station S4 shown in FIGS. 3 to 8 of the above-described embodiment. Using a similar driving means (not shown), the shaft body X in the upright posture is used.
In this case, the rotation direction and the timing of the rotating bodies 66, 66 are simply changed so that the horizontal posture is changed, and the specific configuration is omitted.

The sixth forging station S6
The shaft body X on which the ring-shaped head b is formed is pushed out of the die 6 in a horizontal posture by the knockout pin 16b, and is gripped by a material transfer chuck (not shown) in the horizontal posture. Is transported to the next second material posture changing station S7. And this shaft body X is shown in FIG.
As shown in (1), the punch is provided between the holding plates 67 of the second material posture changing station S7 by the punch 28 provided on the ram side in the standing posture. In that case,
As shown in FIG. 13, a stepped protruding surface is provided so that the shaft body X in the upright posture can be driven between the holding plates 67, 67 in the upright state, and a gap between the holding plates 67, 67 is provided. A punch 28 having substantially the same width is used, and the shaft X is rotated by the punch 28 with the ring-shaped head b facing upward and the shaft portion a in an upright posture orthogonal to the driving direction of the punch 28.
Driving on 6,66 side. And the shaft body X is the punch 2
8 between the holding plates 67, 67 by the
As shown by the phantom line in FIG.
It is held in the upright position in the back part between 67. afterwards,
By the driving means (not shown) similar to the driving means 40 of the above-described embodiment, the holding plates 67, 67 are rotated by 90 degrees from the imaginary line position in FIG. The posture of X is changed to a horizontal state in which the shaft portion a is in the same direction as the driving direction of the punch 28 and the ring-shaped head b is located forward. Thereafter, the shaft body X in the horizontal posture is pushed out of the rotating unit 69 by the knockout pin 68.

Then, in a horizontal position, the shaft body X is gripped by a material transfer chuck (not shown) and carried into the next eighth rolling station S8. When this shaft body X is driven between the holding members 65a and 65b of the rolling station S8 by the punch 29 provided on the ram side in a horizontal posture, the rotary screw rolling dies 65 form the shaft portion a of the shaft body X. A thread groove g is formed on the outer periphery, and an eyebolt having a ring-shaped head b and a thread groove g on the outer periphery of the shaft portion a is manufactured.

Accordingly, a shaft body X such as an eyebolt having a ring-shaped head b and a thread groove g on the outer periphery of the shaft portion a is provided.
Can be integrally manufactured by a single heading molding machine, and mass production of the shaft body X becomes possible.

In the above embodiment, the holding plate 33 or 67 is provided on the rotating body 32 or 66, and the holding plate 33 or 6 is provided.
7, the intermediate material X3 or the shaft X is held, but the intermediate material X3 or the shaft X is directly held by the rotating body 32 or 66 without using the holding plate 33 or 67. Good.

In this case, for example, as shown in FIGS. 15 to 17, the unit case 71 is rotatable around a horizontal axis perpendicular to the direction in which the material is driven by the punch, and is moved by a predetermined distance in the axial direction. Possible pair of rotating bodies 7
On the other hand, peripheral grooves 72a, 72a around the axis are formed on the surfaces of the rotating bodies 72, 72 opposite to the surfaces facing each other, and are protruded from the unit case 71. The rotation of each of the guide cylinders 73 is guided by fitting the plurality of guide cylinders 73 into these circumferential grooves 72a, 72a.
A spring 74, one end of which is provided inside the guide cylinder, is interposed between the peripheral groove 72a and the peripheral groove 72a.
When the intermediate material X3 is driven between the rotating members 72 by the punch 24, the intermediate material X3 may be held between the rotating members 72 by the force of the springs 74.

The driving means for the rotators 72, 72 are the same as the driving means 40 of the above-described embodiment.
Gears 72 b, 72 b are formed on the peripheral surface of the gear 72, and the racks 37 are engaged with the gears 72 a, and the racks 37 are moved up and down so that the two rotating bodies 72, 72 b are moved.
May be configured to rotate 90 degrees back and forth.

In each of the above embodiments, the rotation of the rotating body 32 or 72 of the spherical head d in the intermediate material X3 when pressed and held between the pair of holding plates 33 or the rotating body 72 in any case. The height with respect to the rotation center of the rotating body 32 or 72 of the spherical head d of the intermediate material X in the intermediate material X when the rotating material 32 or 72 is rotated 90 degrees to change the intermediate material to the standing posture is the same as the height with respect to the center. Although the heights are set so that the centers of the punches and dies of each station can be unified to the same height, the rotating body 32 or 72 of the intermediate material X3 is not necessarily required as described above.
Need not be set so as to be the same height with respect to the rotation center. Further, the holding means 5
When 0 is used, the holding member 51 of the holding means 50 may be used as a punch for pushing the intermediate material X3 between the holding plate 33 or the rotating body 32. With this configuration, the punch provided on the ram 4 side in the material posture changing station S4 can be omitted.

FIGS. 18 to 19 show that a shaft body X such as an eyebolt provided with the above-mentioned ring-shaped head b and having a thread groove g on the outer periphery of the shaft portion a is integrated by a single forging machine. This embodiment shows another embodiment in the case of manufacturing. In this embodiment, the first-stage forging station S1 and the second-stage forging station S2 of the above-described embodiment are eliminated, and the forging step is omitted. The overall structure is reduced in size to reduce the installation space.

That is, as shown in FIG. 18, at the first stage forging station T1, the material supply quill 100
From the front end of the moving cutter 10
1. A die 102 and a punch 103 are provided, which apply an impact to a rod-shaped material cut to a predetermined length by 1 to form an intermediate material X3 having a spherical head d at one end of a shaft portion a in one step. Have been.

The second station T2 has a punch 1
The intermediate material X3 in the horizontal posture, which is driven into the rotating unit 104 by the magnetic head 05, has the spherical head d facing upward and the shaft portion a
A first material posture changing station is provided for changing the posture to a standing posture orthogonal to the material driving direction of the punch 24. This first material posture changing station T2 is
It has the same structure as the material posture changing station S7 shown in FIGS. 12 to 14 used in the first embodiment described above, and has the same operation. Therefore, in the first material posture changing station T2 of the second stage, the posture of the intermediate material X3 is changed to the standing state with the spherical head d facing upward, and the center of the spherical head d is aligned with the center of the punch 105. It is projected from the rotation unit 104 so as to coincide with each other, and is gripped by the material transfer chuck (not shown) in this upright posture and carried into the next third-stage forging station T3.

Then, the third forging station T3
Is the fifth forging station S used in the above-described embodiment.
5 and has the same function. Therefore, the spherical head d of the intermediate material X3 is subjected to the forging process by the die 106 and the punch 107 in the upright posture, and the intermediate material X4 in which the spherical head d is flattened is formed. It is sent from the die 106 to the fourth stage forging station T4.

The fourth-stage forging station T4 has the same structure as the sixth-stage forging station S5 used in the above-described embodiment, and has the same function. Therefore, punch 1
A hole is punched from a flattened head by a punching punch 109a incorporated in the shaft 09 to form a shaft body X having a ring-shaped head b at one end of a shaft portion a as shown in FIG. In the upright state, it is sent to the second material posture changing station T5 on the fifth stage.

The fifth material posture changing station T5 in the fifth stage has the same structure as that used in the second material posture changing station S7 in the above-described embodiment, and the operation is the same. Therefore, the shaft body X is
Is driven into the rotating bodies 66, 66 in the standing posture, and is held in the deep portion between the holding plates 67, 67 provided on the rotating bodies 66, 66. After that, the rotation of the rotating bodies 66, 66 causes the shaft body X to be in the standing state. From the horizontal position, the raw material X in the horizontal posture is pushed out of the rotary unit 110 by the knockout pin 112, and is sent to the sixth-stage rolling station T6 in the horizontal posture.

Then, the punch 1 is held while the shaft X is in the horizontal posture.
13, clamping members 114a of the rolling station T6,
114b, and a thread groove g is formed on the outer periphery of the shaft portion a of the shaft body X by a rotary thread rolling die 114.
Is formed, and an eyebolt having a ring-shaped head b and a thread groove g on the outer periphery of the shaft portion a is manufactured.

According to this structure, a ring-shaped head b is provided,
In addition, a shaft body X such as an eyebolt having a thread groove g on the outer periphery of the shaft part a can be integrally manufactured by a single heading molding machine, and mass production of the shaft body X is performed. Can be omitted, the structure of the whole forging machine can be reduced in size, and the installation space can be reduced.

In this embodiment, each rotating unit constituting each of the material posture changing stations S4, S7, T2, T5 is of an individual die block type which can be individually assembled to the die block 3. In this way, the rotating unit can be removed as required, and an individual die block having a normal die can be incorporated in the die block 3 in place of the rotating unit. Alternatively, the forging station can be arbitrarily selected.

[0053]

As described above, according to the first aspect of the present invention, in the material posture changing station, the shaft formed by the forging station up to the preceding stage and the intermediate material having the head formed at one end of the shaft are provided. However, the pushing means pushes the axial direction of the intermediate material in the same direction as the material driving direction of the punch and from the shaft portion side to the die side, and the shaft portion of the pressed intermediate material is pinched from both sides by a pair of rotating plates. In this holding state, both rotating plates are rotated by 90 degrees by driving means to raise the intermediate material so that its shaft portion is orthogonal to the punching direction of the punch. As a result, the intermediate material protrudes out of the die from between the two rotating plates, so that the intermediate material is subjected to the forging process in a state where the posture is changed to the upright posture. Therefore, for example, when manufacturing a shaft having a shaft portion and a ring-shaped head formed at one end of the shaft portion, the shaft portion and the shaft portion are formed from the material at the forging station up to the preceding stage of the material posture changing station. After forming the intermediate material with the head formed at one end, the posture is changed so that the material stands up at this material posture changing station, and at the subsequent forging station, the spherical head is subjected to forging and flattened. The shaft can be deformed and then punched into a ring to produce the shaft. For this reason, the manufacture of the shaft having the above-mentioned ring-shaped head can be performed consistently from the raw material by the forging machine, thereby enabling mass production and low manufacturing cost.

According to the second aspect of the present invention, a receiving surface is provided at a position in front of the rotating plate of the attitude changing station for receiving an intermediate material protruded from between the rotating bodies by the projecting means. Since the holding means for holding the intermediate material while maintaining the standing posture with the protruding surface of the protruding means is provided, the intermediate material protruded from between the two rotating bodies by the protruding means is provided on the die front surface of the posture changing station. The receiving surface of the holding means located on the side, and the projecting surface of the projecting means will be held while maintaining the upright posture, whereby the intermediate material under such a holding state,
The material is reliably gripped by the material transfer chuck and accurately sent to the subsequent forging station.

According to the third aspect, when the attitude of the intermediate material is changed in the material attitude changing station,
The height of the head of the intermediate material with respect to the rotation center of the rotating body when the shaft portion of the intermediate material is pushed and held between the pair of rotating bodies by the pushing means, and rotating these rotating bodies by 90 degrees, the intermediate material is rotated. The height of the head with respect to the rotation center of the rotating body of the material when the material is changed to the standing posture becomes the same height, whereby the center of the head of the intermediate material in the standing posture protruded from the inside of the die by the protruding means. Can be made to coincide with the same height as the center of the punch in the forging station up to the preceding stage of the material posture changing station. Therefore, after the posture is changed by the material posture changing station, when the head of the intermediate material is flattened or a hole is punched in the flattened head at the subsequent forging station, the position changing station or the subsequent position is used. Can be set to the same height as the center of the punch and die in the forging station up to the previous stage of the material attitude changing station, and as a result, the material attitude changing station S4 Although the structure is provided, the centers of the punches and dies in all the pressure forming stations can be unified at the same height, so that the structure of the whole pressure forming machine can be prevented from becoming complicated.

According to the fourth and fifth aspects of the present invention, the first
The position of the intermediate material having the shaft portion and the head at one end of the shaft portion can be changed from a horizontal state to an upright state during the forming by the plurality of forging stations by the posture changing station, and the posture of the intermediate material is changed. The head of the head can be continuously subjected to forging to form a shaft of a desired shape, and the second posture changing station changes the posture of the shaft in the upright state to the horizontal state again. As a result, a thread groove can be continuously formed on the outer periphery of the shaft portion of the shaft body whose posture has been changed to the horizontal state. Therefore,
A shaft such as an eyebolt having a ring-shaped head and having a thread groove on the outer periphery of the shaft can be integrally manufactured by a single forging machine, and mass production of the shaft is possible.

[Brief description of the drawings]

FIG. 1 is a partially omitted transverse cross-sectional view of a press forming machine according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional plan view of the pressure forming machine.

FIG. 3 is an enlarged front view of a station for changing a material posture.

FIG. 4 is a vertical sectional front view of the same.

FIG. 5 is a vertical sectional side view of the same.

FIG. 6 is a transverse sectional view of the same.

FIG. 7 is a sectional view taken along the line AA of FIG. 6;

FIG. 8 is a side view showing the holding means.

FIG. 9 is an explanatory diagram of a driving unit of a rotating body.

FIG. 10 is an explanatory diagram of a drive system of the holding means.

FIG. 11 is a schematic front view of a material transfer chuck.

FIG. 12 is a partially omitted cross-sectional view of a press forming machine in a case where screw rolling is combined.

FIG. 13 is an explanatory diagram showing an operation of pushing a shaft body into a rotating body at a second posture changing station.

FIG. 14 is an explanatory diagram showing a rotation operation of the shaft body in the second posture changing station.

FIG. 15 is a longitudinal sectional side view showing another embodiment of the rotating body.

FIG. 16 is a cross-sectional plan view of the rotating body.

FIG. 17 is an explanatory diagram showing a protruding state of an intermediate material in the rotating body.

FIG. 18 is a schematic cross-sectional view showing another embodiment of the head forming machine for producing eyebolts.

FIG. 19 is a schematic front view of the main part.

FIG. 20 is a partially omitted front view of a general forging machine.

FIG. 21 is a perspective view showing an example of a product to be manufactured.

FIG. 22 is a perspective view showing the shape of the intermediate material during the molding of the product.

[Explanation of symbols]

 11-13 die 15-16 die 21-26 punch 30 rotating unit (die) 32, 32 rotating body 40 driving means 38 knockout pin X shaft body X3 intermediate material a shaft part b ring-shaped head d spherical head S1-S3 Forging station S4, T2 First material posture changing station S5 to S6 Forging station S7, T5 Second material posture changing station S8 Rolling station

Claims (5)

(57) [Claims] 1. A stepwise transfer of a material across a plurality of forging stations each having a die and a punch to form a shaft and an intermediate material having a head formed at one end of the shaft. A multi-stage forging machine for processing the head of the intermediate material in a direction perpendicular to the longitudinal direction of the intermediate material, wherein a station for changing the material attitude is provided between the plurality of forging stations. Then, on the die side front surface in the material posture changing station, the intermediate material formed in the heading station up to the previous stage is axially moved in the same direction as the material driving direction by the punch and from the shaft portion side to the die side. Pushing means for pushing is provided, and the intermediate material pushed by the pushing means is sandwiched and held from both sides on the die side of the material posture changing station. A pair of rotating bodies, driving means for rotating both rotating bodies by 90 degrees after the pushing, and erecting the intermediate material so that a shaft portion thereof is orthogonal to a material driving direction by the punch, and pushing means after the intermediate material is pushed And a projecting means for projecting the intermediate material, which has been erected along with the retraction, from the space between the two rotating bodies toward the front side of the die. 2. A receiving surface for receiving an intermediate material protruded from between a pair of rotating bodies by a protruding means on a front side of a die in a posture changing station, wherein the receiving surface and a protruding surface of the protruding means are provided. In addition to the holding means for holding the intermediate material while maintaining the standing posture,
2. The multi-stage press forming machine according to claim 1, wherein said holding means is reciprocally provided between a front position of said die and a retracted position on a front side of said die. 3. When the intermediate material is pushed and held between a pair of rotating bodies by a pushing means, the holding position of the head with respect to the rotation centers of both rotating bodies in the intermediate material is such that both rotating bodies are 90 degrees. The intermediate material is provided at a relational position that is the same as the height position of the head with respect to the rotation centers of the two rotating bodies when the intermediate material is changed to the standing posture by rotating the head. The multi-stage press forming machine according to claim 1 or 2. 4. A stepwise transfer of the material over a plurality of forging stations each comprising a die and a punch to form a shaft and an intermediate material having a head formed at one end of the shaft. And a multi-stage forging machine for processing the head of the intermediate material from a horizontal direction perpendicular to the length direction of the intermediate material, wherein a front-stage forging station is provided between the plurality of forging stations. Change the posture of the intermediate material formed by processing from a horizontal state to an upright state, and
A first material posture changing station is provided for projecting the intermediate material changed to the standing posture to the front side of the die in an upright state, and the first material posture changing station is changed to the standing posture at a subsequent stage. The head of the intermediate material is provided with a forging station for processing from a direction perpendicular to the longitudinal direction of the intermediate material, while a final molded product formed in the final forging station is provided at a stage subsequent to the final forging station. Change the posture from the standing state to the horizontal state,
And a second material posture changing station for projecting the final molded product, which has been changed to the horizontal posture, to the front side of the die in a horizontal posture, and a final molding whose horizontal posture has been changed to a rear side of the second material posture changing station. A multi-stage press forming machine, comprising: a rolling station provided with a thread rolling die for forming a thread groove on an outer periphery of a shaft portion of a product. 5. The first material posture changing station includes:
Pushing means provided on the die-side front surface of the first material attitude changing station and for pushing the intermediate material from the shaft portion in the same horizontal direction as the material driving direction by the punch toward the die side; and the first material attitude changing station. And a pair of rotating bodies which are provided on the die side and hold the intermediate material pushed by the pushing means from both sides and hold the intermediate material rotated by 90 degrees after the pushing, and the shaft of the intermediate material is pressed by the punch. The driving means for erecting the material in the direction perpendicular to the material driving direction, and the intermediate material erecting with the retraction of the pushing means after the intermediate material is pushed into the die front side from between the two rotating bodies in the erecting posture. Projecting means for projecting, the second material posture changing station has a die-side front surface in the second material posture changing station. A pushing means for pushing the final molded product formed in the final forging station into the die side in an upright state; and a pushing means provided on the die side of the second material posture changing station and pushed by the pushing means. A pair of rotating bodies that hold and hold the final molded product from both sides, and after pressing, rotate both rotating bodies by 90 degrees and tilt the final molded product so that its shaft is in the same direction as the material driving direction by the punch. And a protruding means for projecting the final molded product standing upright with the retraction of the pushing device after pushing the final molded product toward the die front side from between the two rotating bodies in the horizontal posture. 5. The multi-stage press forming machine according to claim 4, wherein: