JPH08192241A - Multi-stage heading machine - Google Patents

Abstract

PURPOSE: To produce a shaft body having a ring like head part by changing the attitude of a raw material on the way in a multi stage heading machine to form the raw material from rough to precise that while the raw material is transferred stage by stage over heading stations provided with a die and a punch respectively. CONSTITUTION: A rotary unit 30 is attached on a die block instead of a die, a pair of rotary bodies 31 are installed on this rotary unit 30, and a rack body 37 being rotated linking to driving of a crank shaft 7 is engaged to a gear 32b of a rotary disk 32. When an intermediate raw material X3 having a spheric head part d at an end of a shaft part a is struck in between the rotary disk 32, the shaft part a is stood so as be crossed orthogonally with the direction of striking with the punch, in this state, the intermediate raw material X3 is made to be projected out with a knock-out pin 38.

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 stepwise transferring a material over a plurality of forging stations each having a die and a punch, and for forming the material from coarse to fine. Relates to the one in which the posture of the above-mentioned material is changed during the forming from the coarse to the fine and the forging is applied.

[0002]

2. Description of the Related Art A forging machine for molding bolts, nuts, and other various parts is usually provided with a die block 3 at a predetermined position of a machine base 2 and a plurality of die blocks 3 are provided on the die block 3, as shown in FIG. By attaching the individual dies 81 to 84 and arranging the same number of punches as the dies 81 to 84 facing each other on a ram (not shown) that moves back and forth toward the dies 81 to 84, each die A plurality of forging stations composed of punches are configured, and rod-shaped material cut into a predetermined length is punched into a die at each forging station to be processed, and the material transfer chucks 90 to 95 are used in the preceding forging station. It is designed to grab the processed material and send it to the subsequent forging station. Therefore, if such a press forming machine is used, it is possible to mass-produce the above parts.

[0003]

By the way, 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, a shaft portion a and an intermediate material X3 in which a spherical head portion d is formed at one end of the shaft portion a are molded, and the spherical head portion d is flattened, and then the head portion d is punched into a ring shape. However, it has been difficult to consistently manufacture the shaft body X having such a ring-shaped head b from the raw material by the above-described press forming machine. That is, since the direction in which the material is driven into the die by the punch is the arrow direction (horizontal direction) in FIG. 22, that is, the axial direction of the material, even if the spherical head d can be formed by press forming, the spherical head d In order to deform d flatly by a punch and a die or to punch it out in a ring shape, for example, the spherical head d is up and the shaft part a is orthogonal to the material driving direction by the punch. This is because it is necessary to change the posture of the material X3, and this cannot be done by the conventional press forming machine. Therefore, the flattening of the spherical head d and the ring-shaped punching have no choice but to rely on the press work, and a large amount is required. It was a hindrance to production.

Therefore, a main object of the present invention is to transfer the material stepwise over a plurality of forging stations so that the attitude of the intermediate material can be changed during the molding when the material is roughly or finely molded. , 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 a standing state, and An object of the present invention is to provide a multi-stage forging machine capable of continuously performing forging.

Another object is to hold an intermediate material which has been changed to a standing posture and which is projected out of the die without changing the posture, and the intermediate material whose posture has been changed by a material transfer chuck can be used. It is an object of the present invention to provide a multi-stage forging machine capable of reliably grasping and then accurately feeding it to the forging station in the subsequent stage, and another object is to provide the intermediate material before and after the posture change. Providing a multi-stage forging machine that can suppress the complexity of the entire forging machine while having a structure that changes the posture of the intermediate material to the standing state by making the head height the same Is what you are trying to do.

Still another object is to change the posture of the intermediate material having the shaft portion and the head portion at one end of the shaft portion from the horizontal state to the standing state during the forming by the plurality of forging stations. While being able to continuously apply forging to the head of the changed intermediate material to form a shaft body of the desired shape, the posture of the shaft body in the standing state can be changed to the horizontal state again. An object of the present invention is to provide a multistage forging machine capable of continuously forming a thread groove on the outer periphery of a shaft portion of a shaft body whose posture is changed to a horizontal state.

[0007]

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

That is, the invention according to claim 1 of the present application (hereinafter referred to as the first invention) transfers the material stepwise over a plurality of forging stations, each of which has a die and a punch, and the shaft portion and the shaft portion. A multi-stage forging machine for molding an intermediate material having a head formed at one end of a shaft, 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 posture is provided between the plurality of forging stations, and the intermediate material formed by the forging stations up to the preceding stage is processed by the punch in the axial direction on the front side of the die side in the material posture changing station. A pushing means for pushing in the same direction as the driving direction and pushing from the shaft side to the die side is provided, and the pushing means pushes the die side of the material posture changing station by the pushing means. A pair of rotating bodies that sandwich and hold the shaft portion of the inserted intermediate material, and both rotors are rotated 90 degrees after being pushed, and the shaft portion of the intermediate material is orthogonal to the material driving direction by the punch. A driving means for erecting the intermediate material and a protruding means for ejecting the intermediate material, which is erected by the backward movement of the pushing means after the intermediate material is pushed, to the front side of the die from between the two rotating bodies in the standing posture. Is characterized by.

In addition to the configuration of the first invention, the invention according to claim 2 (hereinafter, referred to as the second invention) includes a pair of rotating bodies provided on the front side of the die in the position changing station by a projecting means. The holding means has a receiving surface for receiving the intermediate material protruding from the space, and is provided with a holding means for holding the intermediate material while keeping the standing posture between the receiving surface and the protruding surface of the protruding means. And a retracted position on the side of the front surface of the die so as to be reciprocally movable.

Further, in the invention according to claim 3 (hereinafter referred to as the third invention), 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 a pushing means. The holding position of the head of the intermediate material with respect to the center of rotation of the two rotating bodies when held is the position of the head of the intermediate material when the intermediate material is changed to the standing posture by rotating both rotating bodies by 90 degrees. It is characterized in that it is provided at a relational position such that it is at the same height as the height position with respect to the center of rotation of both rotating bodies.

The invention according to claim 4 (hereinafter referred to as the fourth invention) transfers the material stepwise over a plurality of forging stations, each of which has a die and a punch, and the shaft portion and the shaft. A multi-stage forging machine for forming an intermediate material having a head formed at one end of the section, and for processing the head of the intermediate material from a horizontal direction perpendicular to the length direction of the intermediate material. Between the plurality of forging stations, the posture of the intermediate material formed by the forging station on the preceding stage side is changed from a horizontal state to a standing state, and,
A first material posture changing station for projecting the intermediate material changed to the standing posture to the front side of the die in the standing state is provided, and the intermediate position changed to the standing posture is provided at the rear side of the first material posture changing station. While the head of the material is provided with a forging station for processing from the direction perpendicular to the length direction of the intermediate material, the posture of the final formed product formed at the final forging station is set upright after the final forging station. A second material posture changing station that projects the final molded product, which has been changed to a horizontal state and changed to a horizontal posture, to the front side of the die in a horizontal posture, and a horizontal posture on the rear side of this second material posture changing station. It is characterized in that a rolling station provided with a thread rolling die for forming a thread groove is continuously provided on the outer periphery of the shaft portion of the final molded product whose posture has been changed.

Further, in the invention according to claim 5 (hereinafter referred to as the fifth invention), in addition to the configuration of the above-mentioned fourth invention, the first material attitude changing station includes a die in the first material attitude changing station. Pushing means for pushing the intermediate material to the die side from the shaft portion in the same horizontal state as the material driving direction by the punch, and the pushing means provided on the die side of the first material posture changing station. A pair of rotating bodies that sandwich and hold the intermediate material pushed in by both sides, and after pressing, both rotating bodies are rotated by 90 degrees so that the shaft portion of the intermediate material is orthogonal to the material driving direction by the punch. The driving means for standing up and the intermediate material, which has been erected by the backward movement of the pushing means after pushing the intermediate material, is projected to the die front side from between the two rotating bodies in its standing posture. A station for changing the posture of the second material, the station for changing the posture of the second material is provided on the front side of the die side in the station for changing the posture of the second material, and the final molded product formed by the final forging station is in an upright state. And a pair of rotating bodies that are provided on the die side of the second material posture changing station and that sandwich and hold the final molded product pushed in by the pushing means from both sides. After the pushing, both rotating bodies are rotated by 90 degrees, and the driving means for tilting the final molded product so that the shaft portion thereof is in the same direction as the material driving direction by the punch, and with the backward movement of the pushing means after pushing the final molded product. It is characterized in that it is provided with a projecting means for projecting the final molded product which has been erected upright to the front side of the die from between the two rotating bodies in the horizontal posture.

[0013]

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

First, according to the first aspect of the invention, for example, in the case of manufacturing a shaft body having a shaft portion and a ring-shaped head portion at one end of the shaft portion, in the forging stations up to the preceding stage of the material posture changing station. After molding the shaft part and the intermediate material having the head formed at one end of the shaft part, in the material attitude changing station, the pressing means pushes the intermediate material in the same axial direction as the punching direction of the punch and It is pushed from the shaft side to the die side, the pushed intermediate material is sandwiched and held from both sides by a pair of rotating bodies, and then both rotating bodies are driven by the driving means in this holding state.
After the intermediate material is rotated by 0 ° to stand up so that the shaft portion of the intermediate material is orthogonal to the material driving direction by the punch, the intermediate material can be ejected from between the rotating plates to the outside of the die by the protruding means. As a result, the intermediate material is transferred to the subsequent forging station with the posture changed to the standing posture, and in the subsequent forging station,
Since the head is subjected to a forging process to be deformed into a flat shape and then punched into a ring shape, the shaft body can be manufactured in an integrated manner.

Further, according to the second aspect of the present invention, the intermediate material which is projected from between the two rotating bodies by the projecting means and the receiving surface of the sandwiching means located on the front side of the die of the posture changing station and the projecting means. It is sandwiched between the projecting surface and the upright posture, so that the intermediate material is securely grasped by the material transfer chuck under the state of being sandwiched in the upright posture. It will be accurately fed to the subsequent forging station.

According to the third aspect of the invention, when the attitude of the intermediate material is changed at the material attitude changing station,
The height of the head of the material relative to the center of rotation of the two rotating bodies when the shaft portion of the intermediate material is pushed and held between the pair of rotating bodies by the pushing means,
When the intermediate material is changed to an upright position by rotating the intermediate material by a certain degree, the height of the head of the material with respect to the center of rotation of both the rotating bodies becomes the same height, so that the upright attitude projected from the die by the protruding means. It is possible to make the center of the head of the intermediate material and the center of the punches in the forging stations up to the preceding stage of the material attitude changing station at the same height. Therefore, after changing the posture by this material posture changing station, when flattening the head of the intermediate material or punching a hole in the flattened head at the subsequent forging station, after the posture changing station It is possible to unify the center of the punch and die in the forging station at the same height as the center of the punch and die in the forging station up to the preceding stage of the material posture changing station, and as a result, the material posture changing station S4 Although the structure is provided, it is possible to prevent 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 and a ring-shaped head portion 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 in the shaft portion and the intermediate material having the head formed at one end of the shaft portion in the forging station up to the preceding stage in the same manner as the operation of the first invention described above. The means, the pair of rotating bodies, the driving means for the rotating bodies, and the projecting means allow the intermediate material to be rotated 90 degrees from the horizontal state to the standing state, and then the intermediate material can be ejected out of the die. As a result, the intermediate material is transferred to the forging station after that in the state where the posture is changed to the standing posture, and at the subsequent forging station, the head is subjected to forging processing to be deformed into a flat shape, and then the ring shape. By being punched out, the above shaft can be molded into a shaft. Then, by the second posture changing station, the shaft body in the standing state by the operation opposite to that of the first posture changing station is pushed by the pushing means, the pair of rotating bodies, the rotating body driving means and the projecting means. Rotate 90 degrees from the standing state to the horizontal state, change the posture of the shaft body to the horizontal state again, and make a thread groove on the outer periphery of the shaft portion of the shaft body that has been changed to the horizontal state by rotary type thread rolling. It becomes possible to form continuously with a die. As a result, it is possible to consistently manufacture a shaft body such as an eyebolt having a ring-shaped head portion and a thread groove on the outer periphery of the shaft portion by one press forming 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 arranged at a predetermined position of a machine base 2, and as shown in FIG. 1, dies 11 to 16 are arranged side by side at predetermined intervals in the die block 3. The die block 3 is mounted on the machine base 2 in front of the die block 10.
On the front of the ram 4 which is moved back and forth against each die 1
By attaching a plurality of punches 21 to 26 corresponding to 1 to 16 respectively, a plurality of forging stations S1 to S1, each of which comprises a die 11 to 16 and a punch 21 to 26, respectively.
S6 is configured, and the forward movement of the ram 4 sequentially presses the material into each die at each forging station S1 to S6 to perform forging. A crankshaft 7 integrally provided with a flywheel 6 rotated by a drive motor 5 of the forging machine 1 is connected to a rear end of the ram 4 via a connecting member 8. The ram 4 is moved back and forth through the connecting member 8 toward the die block 3 side by the drive of 5. In addition, these forging stations S1, S2, S3, S
The material transfer between S5 and S6 is sequentially performed by the material transfer chucks 9a to 9f schematically shown in FIG.

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

The fourth stage station S4 is an intermediate material X3.
Of the intermediate material X3 punched by the punch 24 with its spherical head d above,
A material posture changing station in which the shaft portion a is changed to a standing posture orthogonal to the material driving direction of the punch 24. In the material posture changing station S4, the die block 3 is used as the material posture changing die 14. The rotating unit 30 is detachably provided.

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

Gears 32b and 32b are formed on the peripheral surfaces of the rotating bodies 32 and 32, respectively.
Racks 37 and 37 are meshed with b and 32b.
That is, as shown in FIGS. 6 and 7, the unit case 31
A pair of rack bodies 37, 37 is vertically movably supported on the rack body, and a drive means 40 for vertically moving the rack bodies 37, 37 is connected to the rack bodies 37, 37, and the rack means is driven by the drive means 40. By moving the bodies 37, 37 up and down, the holding plate 3 is inserted through the rotating bodies 32, 32.
3, 33 are reciprocally rotated by 90 degrees, and the intermediate material X3 driven between the holding plates 33, 33 by this rotation is shown by a phantom line in FIG. 5 from a horizontal posture shown by a solid line in FIG. The spherical head portion d is on the upper side, and the shaft portion a is in a standing posture orthogonal to the direction of material punching by the punch 24.

The drive means 40 is shown in FIGS.
As shown in FIG. 2, from the rack driving cam 42 provided on one end side of the drive shaft 41 provided with the opening / closing cam 41 a of the material transfer chuck arranged on the machine base 2 to the bell crank 43.
Also, an elevating lever 46 for vertically elevating each rack body 37 is fixedly connected to the rotary shaft 45 via the connecting arm 44. Then, the drive shaft 4
As shown in FIG. 2, a transmission shaft 47 interlocking with a crankshaft 7 for moving the ram 4 forward and backward is interlocked with 1 through interlocking means such as a bevel gear, and the drive shaft 41 interlocks with the crankshaft 7. It is designed to be rotated. As a result, the rack bodies 37, 37 are moved up and down in synchronization with the front-back movement of the ram 4, that is, the rotary bodies 32, 32 are rotated in synchronization with the front-back movement of the ram 4, and the rotary body is driven after the punch 24 drives the material. 32, 32 are adapted to be rotated at a predetermined timing.

Further, in the embodiment shown in the drawing, each holding plate 3
A holding portion 33b that receives and holds a part of the spherical head portion d of the intermediate material X3 that is punched by the punch 24 on the opposite surfaces of 3, 33, and a continuous portion of the holding portion 33b,
Further, guide grooves 33c, 33c are provided for guiding the spherical head portion 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. Then, the holding portions 33b, 33b to the holding plates 33, 33
As shown in FIG. 5, the forming position of the spherical head d in the intermediate material X3 when it is pushed by the punch 24 and held between the holding plates 33, 33 is the height with respect to the rotation center of the rotating bodies 32, 32. Position and the rotating bodies 32, 32 by 90
The spherical head d is provided at the same height position as the height position with respect to the center of rotation of the rotating bodies 32, 32 when the intermediate material X3 is changed to the standing posture by rotating the intermediate material X3.
That is, as shown by the alternate long and short dash line in FIG.
It is set so that the center of the spherical head portion d is located on an extension line of 45 degrees with respect to the horizontal line extending from the center of rotation of 2, 32 to the ram side. Therefore, the intermediate material X having the spherical head d formed in the third forging station S3.
3 is a holding plate 3 in this posture changing station S4
When the material X3 is driven between the holding members 33 and 33, the material X3 is held between the holding plates 33 and 33 in a horizontal posture as shown by the solid line in FIGS. The rotating bodies 32, 32 are rotated via the body 37, and the intermediate material X3 is erected so that its spherical head portion d is up and the shaft portion a is orthogonal to the driving direction by the punch 24 as shown by the phantom line in FIG. The posture will be changed.

Further, the material posture changing station S4 is provided with a knockout pin 38 for protruding the intermediate raw material X3 after the posture change to the outside of the rotary unit 30. As shown in FIG. 8, the knockout pin 38 has a stepped projecting surface 38a adapted to the shape of the intermediate material X3 so that the intermediate material X3 after the posture change can be ejected in the upright state. After changing the posture of X3, the holding plate 3 is held with the punch 24 retracted.
3 and 33, and insert the intermediate material X3 into the guide groove 33
While being guided by c and 33c, they are projected to the outside of the rotary unit 30. As a result, at the station S4 at the fourth stage, the intermediate material X3 is in an upright state with the spherical head d facing upward, and the center of the spherical head d is projected so as to coincide with the center of the punch 24. In this standing position, the material is held by the material transfer chuck 9d and carried into the next fifth-stage forging station S5.

Then, as shown in FIG. 1, at the fifth forging station S5, the spherical head d of the intermediate material X3 is forged 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 from the flattened head by the punching punch 26a incorporated in the punch 26, as shown in FIG. A shaft body X having a ring-shaped head portion b at one end of the shaft portion a is manufactured. Further, the punched piece f in that case is discharged through the discharge passage 16a in the die 16.

The dies 11 to 13 and 15 in the forging stations S1 to S3 and S5 of the first to third stages and the fifth stage, respectively.
Is provided with knockout pins 11a, 12a, 13a, 15a for punching out the material from these dies as the punches 21-23, 25 are retreated.
Similarly, knockout pin 2 is used for punches 21, 22 and 25.
1a, 22a, 25a are provided.

In this way, the dies 11, 12, 13 and the punch 2 are provided in the first to third forging stations S1 to S3.
The material is struck from the horizontal direction by 1, 22, 23 to form the intermediate material X3 in which the shaft portion a and the spherical head d are formed on the shaft portion a, and then the material attitude changing station S4 The posture of the intermediate material X3 is changed from the horizontal state to the upright state so that the spherical head d faces upward, and the spherical head d is continuously subjected to forging at the forging stations S5 and S6 to be flattened. Since the flattened head e is punched out in a ring shape, the shaft body X having the ring-shaped head part b can be manufactured in an integrated manner by a press forming machine, and mass production of the shaft body X is achieved. Is possible.

When the attitude of the intermediate material X3 is changed at the material attitude changing station S4, the forming positions of the holding portions 33b and 33b of the holding plates 33 and 33 are set so that the shaft portion a of the intermediate material X3 is paired by the punch 24. The height of the spherical head d of the material X3 with respect to the center of the rotating body 32, 32 when the material is pressed and held between the holding plates 33, 33 of the material X3, and these rotating plates 32, 32 are rotated 90 degrees to form an intermediate material. Since the height of the spherical head d of the material X3 when the X3 is changed to the standing posture is the same as the height of the spherical head d with respect to the rotating bodies 32, 32, the knockout pin 38 projects from the inside of the rotating unit 30. And 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 punches in the forging stations up to the preceding stage of the material posture changing station S4 coincide with the same height. Therefore, when the posture is changed by the material posture changing station S4, the head of the intermediate material is flattened or a hole is punched in the flattened head e in the pressing stations S5 and S6 after that. , The center of the punches 25 and 26 and the dies 15 and 16 in the forging stations S5 and S6 after the material attitude changing station S4 are set to the material attitude changing station S.
4 punches 21 in the forging station up to the front stage,
It is possible to set the height at the same level as the centers of 22, 23 and the dies 11, 12, 13. As a result, the center of the punches and the dies in all the forging stations can be unified at the same height even though the material posture changing station S4 is provided, and it is possible to prevent the structure of the entire forging machine from becoming complicated. It will be possible.

Further, in this embodiment, as shown in FIGS. 8 and 10, the rotating body 32 of the posture changing station S4,
At the front position of 32, a pinching means 50 for pinching the intermediate material X3 projected from between the rotating bodies 32, 32 by the knockout pin 38 while maintaining its posture changed state is provided.

The holding means 50, as shown in FIG.
A holding body 51 having a receiving surface 51a that receives the spherical head portion d of the intermediate material X3 and the shaft portion a, a support body 52 that supports the base portion of the holding body 51, and the support body 52 can slide in the front-back 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 supported slidably in the left-right direction on the front side thereof, and the engaging hole 52a of the support body 52
A base shaft 55 having a swing arm 54 that engages with the base shaft 55, and a guide rod 56 that is parallel to the base shaft 55 and that supports the 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 laid across the front lower portion of the die block 3 so as to be capable of reciprocating in the left-right direction, and a support bracket 57 supported on the machine base 2 side is provided at one end thereof. The lower end of the bell crank 58 is connected, and the upper end of the bell crank 58 is in contact with the base shaft driving cam 59 fixedly provided at a predetermined position of the transmission shaft 47. As a result, as the transmission shaft 47 interlocking with the crankshaft 7 rotates, the base shaft driving cam 59 rotates, causing the bell crank 58 to swing, and the base shaft 55 to reciprocate at a predetermined interval. The movable body 53 and the support body 52 are reciprocated in the left-right direction via the swing arm 54 provided on the base shaft 55, and the sandwiching 51 supported by the support body 52 is the front surface of the rotation unit 30 of the posture changing station S4. It is configured to reciprocate between a position and a standby position on the side of the rotary unit shown in FIG. On the other hand, on the outer periphery of the other end of the base shaft 55,
A spline is formed, and a base shaft rotating lever 60 is fitted to the spline, and the lever 60 is connected to a swing lever 62 that swings by a base shaft rotating cam 61 provided at the end of the drive shaft 41. The rotation of the base shaft rotating cam 61 by the drive shaft 41 causes the base shaft rotating lever 60 to rotate via the swing lever 62, whereby the holding body 51 is positioned on the front surface of the rotary unit 30. When the base shaft 55 is rotated by a predetermined angle,
The holding body 51 is swung in the separating / contacting direction with respect to the front surface of the rotary unit 30 at a predetermined timing, and the holding operation of the intermediate material X3 is performed.

Therefore, the intermediate material X3 projected outside the rotary unit 30 by the knockout pin 38 is
The receiving surface 51a of the holding body 51 located on the front surface of the rotating unit 30 and the protruding surface 38a of the knockout pin 38.
With it will be sandwiched while maintaining its standing posture,
Under this sandwiched state, the intermediate material X3 is reliably grasped by the material transfer chuck 9d, and the rear forging station S is pressed.
6 will be sent accurately.

In the above embodiment, the ring-shaped head b is attached to the shaft X.
Although the case of punching is described, the production of the product may be finished in the crushing process of the spherical head d in the fifth forging station, and in addition to this, the spherical head d and the shaft portion a may be manufactured. You may add another forging process.

Further, a shaft body X such as an eyebolt having a ring-shaped head b and having a thread groove g on the outer periphery of the shaft portion a,
In order to carry out integrated production by one forging machine 1, FIG.
As shown in FIG. 2, after the sixth-stage forging station S6 shown in the above-described embodiment, as the seventh-stage station S7, a second material posture changing station for changing the standing posture of the shaft body X to the horizontal posture again. S7 is the station S8 of the eighth stage, and a rotary type thread rolling in which a thread groove g is formed 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
The rolling stations provided with 5 may be connected in series.

In this case, as shown in FIG. 12, in the sixth-stage forging station S6, in the sixth-stage forging station S6 of the above-described embodiment, a discharge passage for discharging the punched piece f into the die 16 downward. A knockout pin 16b is provided to open 16a and project the molded shaft X to the outside of the die 16. As the second material attitude changing station S7, the same structure as the material attitude changing station S4 shown in FIGS. 3 to 8 of the above-described embodiment is used, and the driving means 40 of the above-mentioned embodiment is used. Using a similar drive means (not shown), the shaft body X in a standing posture is used.
The rotation direction and timing of the rotating bodies 66, 66 are changed so as to change to a horizontal posture, and a specific configuration thereof will be omitted.

Then, the sixth-stage forging station S6
The shaft X on which the ring-shaped head b is formed is projected to the outside of the die 6 in the horizontal posture by the knockout pin 16b, and is gripped by the material transfer chuck (not shown) under the horizontal posture. Then, it is conveyed to the next second material posture changing station S7. And this shaft X is shown in FIG.
As shown in FIG. 4, the punch 28 provided on the ram side in the standing posture drives the sheet between the holding plates 67 of the second material posture changing station S7. In that case,
As shown in FIG. 13, a stepped projecting surface is provided so that the shaft X in the standing posture can be driven between the holding plates 67, 67 in the standing state, and a gap between the holding plates 67, 67 is provided. A punch 28 having substantially the same width is used. With the punch 28, the ring-shaped head b is on the upper side, and the shaft portion a is in an upright posture orthogonal to the driving direction of the punch 28.
Drive to the 6, 66 side. The shaft X is the punch 2 described above.
When it is driven between the holding plates 67, 67 by means of FIG.
3, the shaft X holds the holding plate 67,
It is held upright in the rear part between 67. afterwards,
By the drive means (not shown) similar to the drive means 40 of the above-mentioned embodiment, the holding plates 67, 67 together with the rotating bodies 66, 66 are rotated by 90 degrees from the virtual 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 punch 28 and the ring-shaped head b is located in the front. After that, the horizontal shaft body X in the horizontal posture is projected out of the rotation unit 69 by the knockout pin 68.

Under the horizontal posture, the shaft X is gripped by a material transfer chuck (not shown) and carried into the next eighth stage 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 type thread rolling die 65 moves the shaft portion a of the shaft body X. The eyebolt having the thread groove g formed on the outer circumference thereof and including the ring-shaped head b and the thread groove g on the outer circumference of the shaft portion a is manufactured.

Therefore, a shaft body X such as an eyebolt having a ring-shaped head b and having a thread groove g on the outer periphery of the shaft portion a.
Can be consistently manufactured by one press forming machine, and the shaft X can be mass-produced.

Further, in the above embodiment, the rotating body 32 or 66 is provided with the holding plate 33 or 67, and the holding plate 33 or 6 is provided.
Although the intermediate material X3 or the shaft body X is held via 7, the rotating body 32 or 66 may directly hold the intermediate material X3 or the shaft body X 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 can be rotated about an axis in the lateral direction perpendicular to the direction in which the material is punched by the punch, and can be moved by a predetermined distance in the direction of the axis. Possible pair of rotating bodies 7
2, 72 are provided, while peripheral grooves 72a, 72a centering on the shaft center are formed on the surfaces of the rotating bodies 72, 72 opposite to the surfaces facing each other so as to protrude from the unit case 71. By fitting a plurality of guide cylinders 73 into the circumferential grooves 72a, 72a, the respective rotations are guided, and the guide cylinders 72 are also provided.
And a circumferential groove 72a, one end of which is provided with a spring 74 which is installed in a guide cylinder, and these springs 74 constantly urge the rotating bodies 72, 72 to project in the opposite direction,
When the intermediate material X3 is driven between the rotating bodies 72, 72 by the punch 24, the intermediate material X3 may be held between the rotating bodies 72, 72 by the force of the spring 74.

As the driving means for the rotating bodies 72, 72, similar to the driving means 40 of the above-mentioned embodiment, the rotating bodies 72, 72
Gears 72b, 72b are formed on the peripheral surface of 72, and racks 37 are meshed with these gears 72a, and these racks 37 are moved up and down to rotate both rotors 72, 72.
May be configured to rotate back and forth by 90 degrees.

Further, in any of the above embodiments, the rotation of the rotating body 32 or 72 of the spherical head d in the intermediate material X3 when it is pushed and held between the pair of holding plates 33 or the rotating body 72 in any case. The height with respect to the center is the same as the height with respect to the rotation center of the rotating body 32 or 72 of the spherical head d in the intermediate material X when the rotating body 32 or 72 is rotated 90 degrees to change the intermediate material to the standing posture. Although the center of the punch and the die of each station are unified so as to have the same height, the rotating body 32 or 72 of the intermediate material X3 is not always required as described above.
Needless to say, it is not necessary to set the same height with respect to the rotation center. Further, the holding means 5
When 0 is used, the sandwiching body 51 of the sandwiching means 50 may be used to serve also as a punch for pushing the intermediate material X3 between the holding plate 33 or the rotating body 32. According to this structure, the punch provided on the ram 4 side in the material posture changing station S4 can be omitted.

Further, FIGS. 18 to 19 show a shaft X such as an eyebolt having the above-mentioned ring-shaped head b and a thread groove g on the outer periphery of the shaft a, which is consistently produced by one press forming machine. Another embodiment in the case of manufacturing is shown. In this embodiment, the first-stage forging station S1 and the second-stage forging station S2 of the above-described example are eliminated, and the forging process is simplified, and a forging machine is provided. The entire structure is downsized and the installation space is reduced.

That is, as shown in FIG. 18, in the first-stage forging station T1, the material supply quill 100 is
It is sent out from the tip end of the unit by a fixed length, and the moving cutter 10
A die 102 and a punch 103 are provided, which strike the rod-shaped material cut into a predetermined length by 1 to form the intermediate material X3 in which the spherical head portion d is formed at one end of the shaft portion a in one step. Has been.

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

Then, the forging station T3 of the third stage
Is the fifth-stage forging station S used in the above-mentioned embodiment.
It has the same structure as 5 and has the same operation. Therefore, the spherical head d of the intermediate material X3 is pressed by the die 106 and the punch 107 in the upright posture to form the flattened intermediate material X4 of the spherical head d, and the intermediate material X4 is erected. It is sent from the die 106 to the forging station T4 at the fourth stage.

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

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-mentioned embodiment, and its operation is also the same. Therefore, the shaft 111
Is held in the inner part between the holding plates 67, 67 provided on the rotating bodies 66, 66 by driving the rotating body 66, 66 side in the upright posture, and then the shaft X is raised by the rotation of both rotating bodies 66, 66. After that, the posture is changed to a horizontal state, and the raw material X in the horizontal posture is pushed out of the rotary unit 110 by the knockout pin 112 and sent to the rolling station T6 in the sixth horizontal stage.

Then, the shaft X is kept in the horizontal posture and the punch 1 is used.
13, the holding member 114a of the rolling station T6,
While being driven between 114b, a thread groove g is formed on the outer periphery of the shaft portion a of the shaft body X by the rotary type thread rolling die 114.
Thus, the eyebolt having the ring-shaped head b and the thread groove g on the outer periphery of the shaft portion a is manufactured.

According to this structure, the ring-shaped head b is provided,
Also, the shaft body X such as an eyebolt having the thread groove g on the outer periphery of the shaft portion a can be manufactured in a consistent manner by one forging machine, and the mass production of the shaft body X is enabled, while the forging process is performed. The overall structure of the forging machine can be downsized and the installation space can be reduced.

Further, in this embodiment, the rotary units constituting the material posture changing stations S4, S7, T2 and T5 are of the individual die block type which can be individually assembled to the die block 3. As a result, the rotary unit can be removed as required, and an individual die block equipped with a normal die can be incorporated in the die block 3 instead of the rotary unit. Alternatively, the pressing station can be arbitrarily selected.

[0053]

As described above, according to the first aspect of the invention, in the material posture changing station, the intermediate material in which the shaft portion formed by the forging station up to the preceding stage and the head portion formed at one end of the shaft portion are formed. However, by the pushing means, the axial center direction is the same direction as the material driving direction by the punch and is pushed from the shaft side to the die side, and the shaft portion of the pushed intermediate material is sandwiched from both sides by the pair of rotating plates. In this holding state, both rotary plates are rotated by 90 degrees by the driving means to erect the intermediate material so that its shaft portion is orthogonal to the material driving direction of the punch, and after changing its posture, the protruding means. As a result, the intermediate material is projected from between the rotary plates to the outside of the die, so that the intermediate material is subjected to the forging process after being changed to the standing posture. Therefore, for example, in the case of manufacturing a shaft body in which a shaft portion and a ring-shaped head portion are formed at one end of the shaft portion, the shaft portion and the shaft portion are cut from the raw material in 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, change the posture to raise the material at this material posture changing station, and at the subsequent forging station, press the spherical head to make it flat. The shaft body can be manufactured by deforming and then punching into a ring shape. Therefore, the shaft body having the ring-shaped head can be manufactured consistently from the raw material by the press molding machine, mass production is possible, and the manufacturing cost can be reduced.

Further, according to the second aspect of the invention, at the front position of the rotary plate of the posture changing station, there is provided a receiving surface for receiving the intermediate material projected from between the rotating bodies by the projecting means, and the receiving surface and the above-mentioned receiving surface. Since the sandwiching means for holding the intermediate material while maintaining the standing posture with the projecting surface of the projecting means is provided, the intermediate material projecting from between the two rotating bodies by the projecting means is the front surface of the die for the posture changing station. The receiving surface of the sandwiching means located on the side and the projecting surface of the projecting means are sandwiched while maintaining an upright posture, whereby the intermediate material under the sandwiched state,
It will be securely grasped by the material transfer chuck and accurately fed to the subsequent forging station.

According to the third aspect of the invention, when the attitude of the intermediate material is changed at the material attitude changing station,
The height of the head of the material relative to the center of rotation 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 these rotating bodies are rotated by 90 degrees to move the intermediate material. The height of the head of the material with respect to the center of rotation of the rotating body when the material is changed to the standing posture has the same height, whereby the center of the head of the intermediate material in the standing posture that is projected from the die by the projecting means. Can be made flush with the center of the punches in the forging stations up to the stage before the material posture changing station. Therefore, after changing the posture by this material posture changing station, when flattening the head of the intermediate material or punching a hole in the flattened head at the subsequent forging station, after the posture changing station It is possible to set the center of the punch and die in the forging station at the same height as the center of the punch and die in the forging stations up to the preceding stage of the material posture changing station, and as a result, the material posture changing station S4 is set. Although the structure is provided, the centers of the punches and dies in all the forging stations can be unified at the same height, and it is possible to prevent the structure of the entire forging machine from becoming complicated.

According to the fourth and fifth inventions, the first
The posture changing station can change the posture of the intermediate material having the shaft portion and the head portion at one end of the shaft portion from the horizontal state to the standing state during the forming by the plurality of forging stations, and the posture changed intermediate material While the head body of the head can be continuously subjected to forging to form a shaft body having a desired shape, the posture of the shaft body in the standing state is changed to the horizontal state again by the second posture changing station. Thus, the thread groove can be continuously formed on the outer periphery of the shaft portion of the shaft body whose posture is changed to the horizontal state. Therefore,
A shaft body such as an eyebolt having a ring-shaped head portion and a thread groove on the outer periphery of the shaft portion can be continuously manufactured by one press forming machine, and the shaft body can be mass-produced.

[Brief description of drawings]

FIG. 1 is a partially omitted horizontal 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 molding machine.

FIG. 3 is an enlarged front view of a station that changes 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.

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

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

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

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 horizontal cross-sectional view of a press forming machine in the case where a screw rolling process is combined.

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

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

FIG. 15 is a vertical cross-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 forging machine for manufacturing the eyebolt.

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 an 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 X3 Intermediate Material a Shaft b Ring Head d Spherical Head S1 to S3 Forging station S4, T2 First material attitude changing station S5 to S6 Forging station S7, T5 Second material attitude changing station S8 Rolling station

Claims (5)

[Claims] 1. A stepwise transfer of a material over a plurality of forging stations, each of which includes a die and a punch, to form an intermediate material having a shaft portion and a head formed at one end of the shaft portion, A multi-stage forging machine for processing the head of the intermediate material from a direction perpendicular to the length direction of the intermediate material, wherein a station for changing the material attitude is provided between the plurality of forging stations. Then, on the front side of the die side in this material posture changing station, the axial direction of the intermediate material formed by the forging station up to the preceding stage is in the same direction as the material driving direction by the punch and from the shaft side to the die side. A pushing means for pushing is provided, and the intermediate material pushed by the pushing means is sandwiched and held on both sides by the die side of the material posture changing station. A pair of rotating bodies, a driving means for rotating the rotating bodies by 90 degrees after being pushed up so that the shaft of the intermediate material stands upright with respect to the material driving direction by the punch, and a pushing means after pressing the intermediate material. The multistage forging machine is characterized in that it is provided with a projecting means for projecting the intermediate material, which has been erected by the retreat of the die, to the die front side from between the two rotating bodies in the erected posture. 2. A front surface of the die in the posture changing station has a receiving surface for receiving the intermediate material projected from between the pair of rotating bodies by the projecting means, and the receiving surface and the projecting surface of the projecting means. With the holding means for holding the intermediate material while keeping the standing posture,
2. The multi-stage press forming machine according to claim 1, wherein the sandwiching means is provided so as to be reciprocally movable between a front surface position of the die and a retracted position laterally of the front surface of the die. 3. The holding position of the head of the intermediate material with respect to the center of rotation of the two rotating bodies when the intermediate material is pushed between the pair of rotating bodies by the pushing means and held by the rotating body is 90 degrees. The head is provided at a relational position that is at the same height as the height position of the head of the intermediate material with respect to the center of rotation of the two rotating bodies when the intermediate material is rotated to change the standing posture. The multi-stage press forming machine according to claim 1 or claim 2. 4. A stepwise transfer of the material over a plurality of forging stations each having a die and a punch to form an intermediate material having a shaft portion and a head formed at one end of the shaft portion, A multi-stage forging machine for machining the head of the intermediate material from a horizontal direction perpendicular to the lengthwise direction of the intermediate material, wherein the forging station on the preceding stage is provided between the plurality of forging stations. Change the posture of the intermediate material that has been molded and processed from the horizontal state to the standing state, and
A station for changing the posture of the first material that projects the intermediate material changed to the standing posture to the front side of the die in the standing state is provided, and is changed to the standing posture on the rear side of the station for changing the posture of the first material. While 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, a final molded product formed at the final forging station is provided at a stage subsequent to the final forging station. Change the posture from standing to horizontal,
And a second material posture changing station that projects the final molded product that has been changed to a horizontal posture to the front side of the die in a horizontal posture, and the final molding that is changed to a horizontal posture on the rear side of this second material posture changing station. A multi-stage forging machine, wherein a rolling station provided with a thread rolling die for forming a thread groove is continuously provided on the outer periphery of the shaft portion of the product. 5. The first material posture changing station,
The first material attitude changing station, which is provided on the front surface of the first material attitude changing station and presses the intermediate material to the die side from the shaft portion in the same horizontal state as the material driving direction by the punch, and the first material attitude changing station. A pair of rotating bodies which are provided on the die side of the intermediate body and which hold the intermediate material pressed by the pressing means by sandwiching it from both sides, and both the rotating bodies are rotated by 90 degrees after being pressed so that the shaft portion of the intermediate material is punched. Drive means for standing up orthogonally to the material driving direction and the intermediate material that has been erected by the backward movement of the pushing means after pushing the intermediate material from between the rotating bodies in its standing posture to the die front side. And a die-side front surface of the second material attitude changing station. A push-in means that is provided to push the final molded product that has been formed and processed in the final forging station to the die side in the upright state, and a die side of the second material posture changing station, and is pushed in by the push-in means. A pair of rotating bodies that sandwich and hold the final molded product, and both rotators are rotated 90 degrees after being pushed, and the final molded product is tilted so that its shaft portion is in the same direction as the material driving direction by the punch. And driving means for pushing the final molded product, which is erected by the backward movement of the pushing means after pushing the final molded product, to the front of the die from between the two rotating bodies in the horizontal posture. The multistage forging machine according to claim 4, characterized in that