JPH0347713Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a material transfer device for a multi-stage heading forming machine that heads a material in stages using a plurality of heading stations equipped with opposing dies and punches; More specifically, the present invention relates to a material transfer device having a plurality of material transfer chucks for sequentially transferring the material to each heading station.

(Prior art) A multi-stage heading forming machine for forming bolts, nuts, and various other parts processes material supplied from the side of the machine into multiple heading machines equipped with opposing dies and punches. This type of forging machine is configured to continuously form products of a predetermined shape by performing the forging process in stages from rough to fine at a station. A material transfer device is provided that receives the intermediate molded product forged at the forging station and sequentially transfers it to a forging station on the downstream side.

For example, as shown in FIGS. 6 and 7, this material transfer device includes a movable frame that is slidably supported on the front end of a support frame 50 and reciprocated in the direction in which the dies 52 are arranged side by side by a drive mechanism 51. 53, and a pair of support shafts 54, 54 on the front surface of the movable frame 53.
A plurality of material transfer chucks 55 .
A pair of sector gears 56 (only one shown in FIG. 7) are fixedly installed at intermediate portions of the shafts 4 and 54 and mesh with each other, and a roller member 57 is integrally attached to the rear end of one of the support shafts 54. , each of the above dies 52
A camshaft 59 that rotates in synchronization with the forward and backward movements of the punch 58, which is moved forward and backward toward the camshaft 59, and one pair for each of the material transfer chucks 55, which are attached to the camshaft 59 with bolts (not shown) or the like. cam members 60, 60 for opening and closing, and each of these cam members 6
and a cam follower 61 that opens and closes each material transfer chuck 55 by swinging with rotations of 0.0 and 60 degrees to rotate a support shaft 54 to which the roller member 57 is attached, and opens and closes each material transfer chuck 55. The material or intermediate molded product held by the die 55 is transferred to a predetermined forging station composed of the die 52 and the punch 58, and each chuck 55 is opened as the punch 58 moves forward. By moving 55 back to its original position, the raw material or intermediate molded product is sequentially transferred to the heading station on the downstream side.

By the way, when molded products with different shapes, especially molded products with different shaft lengths, are forged using a single forging machine, the material transfer chuck 55 is opened and closed according to the change in the shaft length. The timing needs to be adjusted. For example, as shown in FIG. 8, in the case of a molded product A with a relatively long shaft length, the moment the shaft end of the molded product I is inserted into the die 52 by the punch 58, the material transfer chuck 55 By opening the chuck 55 as shown by the chain line, the chuck 55 is attached to the shaft of the molded product A when punched by the punch 58.
to prevent scratches caused by
Furthermore, as shown in FIG.
Even when the material is ejected from the die 52, in order to prevent the occurrence of scratches in the same way as described above, the material is transferred immediately before the punch 58 retreats and the tip of the shaft of the molded product A comes out of the die 52. When the chuck 55 is closed, the shaft of the molded product is held.

On the other hand, as shown in FIG. 8, in the case of molded product B with a short shaft length, the moment the punch 58 reaches the position just before the forward end and the tip of the shaft of molded product B is inserted into the die 52. When the chuck 55 for material transfer is opened, the molded product driven into the die 52 is moved to the knockout pin 62 as shown in FIG.
Even when the material is pushed out and discharged from the die 52, the punch 58 is slightly retracted from the forward end and the chuck 55 for transferring the material is closed just before the tip of the shaft of the molded product comes out of the die 52. It is designed to hold the shaft of the product.

That is, as shown in FIG. 9, the open period A of the material transfer chuck when forging a molded product with a relatively long shaft length is from the time when the punch reaches a predetermined position before the forward end until the punch is moved again. On the other hand, in the case of forging a molded product with a short shaft length, the opening period B of the material transfer chuck is until the chuck retreats to a predetermined position before the forward end. This is a short period of time from the time when the punch advances further than when molding a molded product and reaches a position just before the forward end until the time when the punch slightly retreats from the forward end. Therefore, when molding products with different axial lengths, as shown in FIG.
By adjusting the mounting state of the pair of cam members 60, 60 fixed to the cam shaft 59 by etc., and changing the phase of the cam members 60, 60, the swinging state of the cam follower 61 can be changed. As a result, the opening and closing operations of the material transfer chuck 55 can be adjusted at predetermined timings in accordance with the difference in the axial length of the molded product.

(Problem to be solved by the invention) By the way, as mentioned above, the phase of the pair of opening/closing cam members is adjusted so that the opening/closing operation of the material transfer chuck occurs at a predetermined timing according to the axial length of the molded product. In order to facilitate this task,
Normally, as shown in FIG. 7, the support frame 50 is rotated upward about a base shaft 63 that supports the rear end of the support frame 50, and the entire support frame 50 including the material transfer chuck 55 is moved. With the opening/closing cam members 60, 60 rotated upward and retracted, loosen the bolts (not shown) that fix the pair of opening/closing cam members 60, 60 to the cam shaft 59 to adjust the phase of the cam members 60, 60. Alternatively, the phase of each pair of cam members 60, 60 is adjusted after removing all the cam members 60 along with the cam shaft 59 from the machine, resulting in poor workability.

In addition, the operator
After adjusting the phase of the cam members 60, 60 by loosening the bolts etc. fixing the cam members 60, 60 to the cam shaft 59,
Again, when fixing the cam members 60, 60 to the camshaft 59 with bolts etc., these cam members 6
0 and 60 tend to deviate, making it difficult to perform the adjustment work accurately.

In addition, it is possible to prepare a camshaft for each molded product with multiple cam members attached in advance so that the material transfer chuck opens and closes at a predetermined timing depending on the shaft length of the molded product to be molded. However, in this case, a plurality of camshafts are required for each molded product to be forged, which is undesirable because it unnecessarily increases equipment costs.

This invention deals with the above-mentioned situation.
When adjusting the phase of a pair of opening/closing cam members so as to open and close the material transfer chuck at a predetermined timing, the adjustment work can be easily performed, and
Furthermore, the purpose is to enable extremely accurate adjustment.

(Means for Solving the Problems) In order to solve the above problems, the present invention is characterized by the following configuration.

That is, a multi-stage machine having a plurality of forging stations equipped with dies and punches facing each other, and a plurality of material transfer chucks that reciprocate in the direction in which these forging stations are lined up to sequentially transfer the material to each forging station. A material transfer device of a type heading forming machine includes a camshaft that rotates in synchronization with the forward and backward movement of the punch, and a pair of opening/closing cam members provided on the camshaft in correspondence with each of the material transfer chucks. and a plurality of driven members that open and close the respective material transfer chucks by being driven in accordance with the rotation of these opening/closing cam members,
The camshaft is movable in parallel in a direction away from the driven member, and the pair of opening/closing cam members are individually phase adjustable with respect to the camshaft, and each of the pair of opening/closing cam members a gear member fixed to rotate integrally with the cam member;
a drive gear that engages with the gear member as the camshaft moves in a direction away from the driven member; and a rotation operating means that changes the phase of the pair of opening/closing cam members by rotating the drive gear. and,
The camshaft is characterized by further comprising a fixing means for fixing each pair of opening/closing cam members on the camshaft to the camshaft.

Further, in a material transfer device for a multi-stage heading forming machine having a configuration similar to that described above, the drive motor changes the phase of the pair of opening/closing cam members by rotating the drive gear, and the material transfer chuck. A control means may be provided for controlling the operation of the drive motor so as to rotate the drive gear so that the opening and closing period of the drive motor is a predetermined period that is preset according to the axial length of the molded product to be forged.

Furthermore, the fixing means is provided with cylinders fixed to the sides of each pair of opening/closing cam members on the camshaft, and within each of these cylinders, the fixing means rotates integrally with the camshaft and extends in the axial direction of the camshaft. The cam member may be configured to include a piston that is slidably inserted into the cam member and fastens each pair of cam members to the cam shaft.

(Function) According to the above configuration, when adjusting the opening/closing period of each material transfer chuck according to the axial length of the molded product to be molded, the cam shaft is moved in parallel in a direction away from the driven member. After engaging the gear member integral with each pair of opening/closing cam members provided on the camshaft with the drive gear, the fastening state of the pair of opening/closing cam members to the camshaft by the fixing means is released, and By rotating the drive gear by a predetermined amount by the rotation operating means, the phase of each pair of cam members with respect to the cam shaft changes,
The driven period of the driven member per one forward and backward movement of the punch by the cam member changes, and accordingly, the opening/closing period of each of the material transfer chucks is variably adjusted. As described above, according to the present invention, each material transfer chuck is retracted upward or the camshaft is moved in parallel in a direction away from the driven member without removing the camshaft, as in the conventional case. Just by engaging the drive gear with the gear member integrated with the pair of opening/closing cam members and rotating the drive gear by the rotation operator,
It becomes possible to easily adjust the opening/closing period of each material transfer chuck, and the workability can be further improved. In addition, by rotating the drive gear, the opening and closing periods of each material transfer chuck are adjusted, so by appropriately setting the gear ratio of the gear and the gear member that engages with it, it is possible to achieve extremely good results. It becomes possible to make fine adjustments, and the operating force required during adjustment can be reduced.

Furthermore, a drive motor that rotates the drive gear and a drive gear that rotates the drive gear so that the period of opening and closing of the chuck for transferring the material is a predetermined period that is preset according to the axial length of the molded product to be forged. When a control means for controlling the operation of the drive motor is provided, the control means automatically adjusts the opening/closing period of each material transfer chuck according to the axial length of the molding to be performed. As a result, the workability can be further improved.

Further, the fixing means for fixing the pair of opening/closing cam members to the camshaft is a cylinder fixed to the side of each pair of opening/closing cam members on the camshaft, respectively;
Inside each of these cylinders, there is a cylinder that rotates integrally with the camshaft.
In addition, in the case of a piston that is slidably inserted in the axial direction of the camshaft and fastens each pair of cam members to the camshaft, all that is required is to supply and discharge hydraulic pressure to and from the cylinder. , it becomes possible to fasten and release the cam member to the camshaft using the piston, and as a result, it is extremely easy to fasten and release the pair of cam members to the camshaft as the opening and closing period of each material transfer chuck is adjusted. As a result, the workability can be improved, and in conjunction with this, the overall workability when adjusting the opening/closing period of each chuck can be improved.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

First, to explain the general structure of this multi-stage heading forming machine, as shown in Figs.
A plurality of (four in the illustrated example) dies 3...3 are arranged at regular intervals. Further, on the front surface of the ram 4 that moves forward and backward toward each of these dies 3, punches 5...5, the same number as each of the dies 3, are arranged so as to face each of the dies 3, respectively. Each of these dies 3 and punches 5 constitute a plurality of forging stations.

Further, a movable frame 7 is slidably supported on the front end of the support frame 6 placed on the die block 2, and a movable frame 7 is provided on one side of the movable frame 7 to allow the punch 5 to advance and retreat. A drive rod 8 that synchronizes and advances and retreats with a predetermined stroke in the direction in which the dies 3 are arranged in parallel orthogonal to the direction in which the punch 5 advances and retreats.
are connected via the connecting pin 9, so that the movable frame 7 moves between the adjacent dies 3, 3 as the drive rod 9 advances and retreats. The punch 5 is moved back and forth once during the time that the punch 5 is retreating by a distance equal to the interval.

Furthermore, the same number of material transfer chucks 10 as the dies 3 are disposed on the front side of the movable frame 7, and each of these material transfer chucks 10 is connected to the front end of the movable frame 7. A pair of left and right chuck arms 10a, 10a rotatably supported via a pair of support shafts 11, 11, respectively.
and a pair of chuck claws 10b, which are attached to the lower end of each chuck arm 10a and hold a material (not shown). A pair of sector gears 1 that mesh with each other are provided in the penetrating portion of the movable frame 7 in each of the support shafts 11, 11.
2 and 12 are fixed to each other, and lever members 13...13 are fixed to the rear end of one of the support shafts 11. Further, at a predetermined position of the machine base 1, a cam shaft 14 for opening and closing each of the material transfer chucks 10 is rotatably supported by a support bracket 15, and as shown in FIG.
An engaging member 16 is integrally attached to one side of the camshaft 14. On the other hand, this engaging member 1
A drive shaft 17 rotated by a drive source (not shown) for moving the ram 4 forward and backward is disposed near the side of the ram 6, and is meshed with a gear 18 fixed to the drive shaft 17. An interlocking member 20 is provided, to which a gear 19 is fixedly attached, and the interlocking member 20 is rotationally driven as the drive shaft 17 rotates. As shown in FIGS. 1 and 3, the engaging member 1 on the camshaft 14 is
An engagement protrusion 16a integrally formed on the interlocking member 6 is engaged with an engagement groove 20a formed on the interlocking member 20, so that as the drive shaft 17 rotates, the camshaft 14 It is designed to be rotated in synchronization with the forward and backward movements of the punch 5.

Note that, as shown in FIG. 3, the interlocking member 20
A camshaft position detection sensor 22 is disposed for detecting the position of a detection piece 21 fixed on the outer peripheral surface of the camshaft 14 and detecting the rotation angle of the camshaft 14 to stop the camshaft 14 at a predetermined position. As shown in FIG.
When the camshaft 14 is stopped, the engaging member 1 is attached to the end of the camshaft 14.
A fixing means 23 such as a solenoid valve that engages with the outer peripheral surface of the camshaft 6 to restrict rotation of the camshaft 14 is provided.

Furthermore, as shown in FIGS. 1 and 4, the camshaft 1
4 includes a pair of opening/closing cam members 24 provided corresponding to each material transfer chuck 10.
cam followers 25 . . . 25 are supported by the support frame 6 via a support shaft 26 . As the cam members 24a and 24b rotate, each cam follower 25 swings, thereby causing the pressing member 27 fixed to the tip of the cam follower 25 to
The roller member 28 supported by the lever member 13 is pushed down, and as a result, the support shaft 11 integrated with the lever member 13 rotates in a predetermined direction. By rotating the support shafts 11, 11, respectively, each chuck 10 is opened left and right about each support shaft 11, 11 from the state shown by the solid line in FIG.
It is designed to retreat from the advancing punch 5.

Note that the rear end portion of the support frame 6 is fixedly supported by a pair of left and right base shafts 29, 29 disposed at the rear of the camshaft 14 and parallel to the camshaft 14.

In this embodiment, as shown in FIGS. 1 and 4, a screw shaft is inserted between a support bracket 15 that rotatably supports the camshaft 14 and a bracket 30 disposed at the rear of the machine base 1. 31 is rotatably supported, and the screw shaft 31 is connected to a drive motor 32.
By rotating the support bracket 15 forward and backward, the support bracket 15 is reciprocated back and forth along the pair of left and right guide rails 33, 33 fixed to the machine base 1, and the camshaft 14 is rotated forward and backward. From the state shown in FIGS. 1 and 4, the machine base 1 is moved in parallel toward the rear, away from each cam follower 25. In addition, each of the above guide rails 33, 3
Stopper portions 33a...3 are provided at the front and rear ends of 3, respectively.
3a is formed to ensure that the support bracket 15 is stopped at a predetermined position.

Further, as shown in an enlarged view in FIG. 5, large-diameter gear members 34, 34 are fixed to one side of each pair of opening/closing cam members 24a, 24b, and each cam member 24a, Fixing means 35...35 for fixing each cam member 24a, 24b to the cam shaft 14 are provided on both sides of the cam shaft 24b.
is installed. This fixing means 35 includes cylinders 36...36 fixed to the camshaft 14 via fixing members (not shown) such as bolts, and each cylinder 3
6, each piston 37...37 is slidably inserted in the axial direction of the camshaft 14. Further, a hydraulic pressure supply passage 38 is formed in the axial center of the camshaft 14, and this hydraulic pressure supply passage 38 and hydraulic pressure passages 39 formed in each of the cylinders 36 are formed at the end of the support bracket 15. It is connected to a hydraulic power source (not shown) via a communication path 40. A spline is formed between the outer circumferential surface of each piston 37 and the inner circumferential surface of each cylinder 36 that is in contact with it, or between the inner circumferential surface of each piston 37 and the outer circumferential surface of camshaft 14 that is in contact with it. (not shown), each piston 37 and the camshaft 14 rotate integrally. Additionally, a plurality of pin members (not shown) protruding in the axial direction of the camshaft 14 are fixed in the cylinder 36, and the piston 37 is moved in the axial direction of the camshaft 14 with respect to the pin members. By enabling the piston 37 to engage
The camshaft 14 and the camshaft 14 may be configured to rotate integrally.

Incidentally, as shown in FIG. 5, the piston 37
A plurality of coil springs 41 . Support shaft 2
A cylinder 42 is disposed that pushes down the cylinder 6 centered on the cylinder 42 .

Furthermore, as shown in FIGS. 1, 4, and 5, on the machine base 1 behind the camshaft 14, there is a camshaft 14.
A support bracket 43 is installed in parallel with the support bracket 43, and a small-diameter drive gear 44 that meshes with each of the gear members 34 is mounted on the bracket 43.
A drive motor 45 is fixedly attached to each gear member 34, and the support bracket 15 supporting the camshaft 14 is moved rearward as shown by the chain line in FIG. As a result, each gear member 34 and the drive gear 44 mesh with each other.

On the other hand, as shown in FIG.
A control unit 46 is provided for controlling the operation of 5.
, a signal from a camshaft position detection means 22 which is disposed below the interlocking member 20 and detects the rotation angle of the camshaft 14, and a forward/backward movement position of the punch 5 corresponding to the rotation angle of the camshaft 14. A signal from the punch position detection means 47 that detects the punch position and a signal from the shaft dimension input means 48 that converts the shaft length dimension of the molded product to be molded into an electrical signal and outputs the electrical signal are input.
Based on each of these input signals, the control unit 46 controls each of the drive motors 45...45.
A control signal is output to the drive motor 45, thereby controlling the operation of each of these drive motors 45.

Next, to explain the operation of this embodiment, when adjusting the opening/closing period of each material transfer chuck 10 in accordance with the axial length of the molded product to be molded, first, the support frame 6 shown in FIG. After pushing down the cam follower 25 by the cylinder 42 disposed on the lower surface of the cam follower 25 to restrict the rotation of the cam follower 25 about the support shaft 26, the support bracket is fixed by rotating the screw shaft 31 via the drive motor 32. 15, the camshaft 14 moves in parallel in a direction away from the cam follower 25, and as a result, as shown by the chain line in FIG. 34 and drive gear 44 mesh with each other. In this state, the pair of opening/closing cam members 24a, 2 are connected by the fixing means 35.
4b is released from its fastened state to the camshaft 14.
That is, by stopping the supply of the hydraulic pressure supplied into the cylinder 36 via the hydraulic pressure supply passage 38 in the camshaft 14, the state in which the cam members 24a, 24b are fastened to the camshaft 14 by the piston 37 is released. Next, by operating the drive motor 45, the gear member 34 is rotated by a predetermined amount via the drive gear 44 by the drive motor 45. As a result, the attachment state of each pair of opening/closing cam members 24a, 24b to the camshaft 14 is adjusted, and the phase of each pair of cam members 24a, 24b changes. , 24b changes the swinging period of the cam follower 25 per one movement of the punch 5, and accordingly, the open period of each material transfer chuck 10 is variably adjusted. In this way, according to this embodiment, the camshaft 14 can be separated from the cam follower 25 without retracting each material transfer chuck 10 upward or removing the camshaft 14 from the machine base 1, as in the conventional case. The opening and closing period of each material transfer chuck 10 can be easily adjusted by simply moving the gear member 34 in parallel in the direction to mesh with the drive gear 44 and rotating the drive motor 45 in this state. Thereby, the workability of the adjustment work can be further improved. Furthermore, since the opening and closing period of each material transfer chuck 10 is adjusted by rotating the drive gear 44, the gear ratio of the drive gear 44 and the gear member 34 meshing therewith must be set appropriately. This makes it possible to perform fine adjustment extremely well, and also to reduce the operating force required during adjustment.

Furthermore, when a control unit 46 is provided to control the operation of the drive motor 45, each material is transferred according to the axial length of the molded product to be molded based on the control signal output from the control unit 46. The drive motor 4 is operated so that the opening/closing period of the chuck 10 is a predetermined period.
5 is controlled so that each chuck 10
Since the opening/closing period of the molded product is automatically adjusted according to the axial length of the molded product, the workability can be further improved.

Further, the cylinder 3 constituting the fixing means 35
By simply supplying and discharging hydraulic pressure to and from the piston 37, the pair of opening/closing cam members 24a and 24b can be opened and closed by the piston 37.
It is possible to connect and release the camshaft 14 to the camshaft 14.
As a result, as the opening and closing period of each material transfer chuck 10 is adjusted, the pair of opening and closing cam members 24a,
24b to the camshaft 14 and its release can be performed extremely easily, improving the workability, and also improving overall efficiency when adjusting the opening/closing period of each chuck 10. can improve workability.

In this embodiment, as shown in FIG. 5, a coil spring 41 is interposed between the cylinder 36 and the piston 37 that constitute the fixing means 35, so that the fixing means 35 can The cam shaft 1 of the opening/closing cam members 24a, 24b
Even if the state of engagement with respect to 4 is canceled,
Each of these cam members 24a, 24b is prevented from inadvertently rotating.

Further, in this embodiment, although the fixing means 22 are provided on both sides of each pair of opening/closing cam members 24a and 24b, the cam members 22
A fixing member (not shown) integral with the camshaft 14 is provided on one side of the cam members 24a, 24b.
The pair of cam members 24a, 24b are fixed to the camshaft 14 by pressing the pair of cam members 24a, 24b against the fixed member by a piston 37 constituting the fixing means 35 from the other side of the cam shaft 4b. You may do so. Furthermore, it is also possible to configure the hydraulic pressure to be individually supplied to each cylinder 36 constituting the fixing means 35.

Furthermore, the drive motor 45 is not provided individually for each pair of cam members 24a, 24b;
For example, by moving one drive motor 45 and the drive gear 44 integrated therewith along the support bracket 43, each pair of cam members 24a, 24
b... It is also possible to configure so that the phases of 24a and 24b are adjusted sequentially, and it is also possible to configure so that the drive gear 44 that meshes with the gear member 34 is individually rotated manually. .

(Effects of the invention) As described above, according to the invention, when adjusting the opening/closing period of each material transfer chuck according to the axial length of the molded product to be molded, each material transfer chuck can be move the chuck upwards,
Alternatively, without removing the camshaft from the machine, the camshaft is moved in parallel in a direction away from the driven member to engage the gear member fixed to each pair of opening/closing cam members with the drive gear, and By simply rotating the gear using the rotary operating means, it becomes possible to adjust the opening and closing periods of each material transfer chuck, thereby further improving the workability of the adjustment work. In addition, by rotating the drive gear, the opening and closing periods of each material transfer chuck are adjusted, so by appropriately setting the gear ratio of the gear and the gear member that meshes with it, extremely fine control can be achieved. It becomes possible to make adjustments, and the operating force during adjustment can be reduced.

Furthermore, a drive motor that rotates the drive gear and a drive gear that rotates the drive gear so that the period of opening and closing of the chuck for transferring the material becomes a predetermined period that is preset according to the axial length of the molded product to be forged. When a control means for controlling the operation of the drive motor is provided, the control means automatically adjusts the open period of each material transfer chuck according to the axial length of the molded product to be molded. In particular, the workability can be further improved.

Further, the fixing means for fixing the pair of opening/closing cam members to the camshaft is a cylinder fixed to the side of each pair of opening/closing cam members on the camshaft, respectively;
Inside each of these cylinders, there is a cylinder that rotates integrally with the camshaft.
In addition, when it is composed of a piston that is slidably inserted in the axial direction of the camshaft and fastens and fixes each pair of cam members to the camshaft, it is only necessary to supply and discharge hydraulic pressure to and from the cylinder. When adjusting the opening and closing of each material transfer chuck, the pair of cam members can be fixed to and released from the cam shaft very easily, which improves work efficiency and improves the workability. Accordingly, the overall workability in adjusting the opening/closing period of each chuck can be further improved.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention. Figure 1 is a plan view of the main parts of a multi-stage heading molding machine equipped with a material transfer device according to this embodiment, and Figure 2 is a plan view of the main parts of the multi-stage forming machine equipped with the material transfer device according to the embodiment. 3 is an enlarged sectional view taken along the - line in Fig. 1, Fig. 4 is an enlarged sectional view of the main part showing the configuration of the material transfer device, and Fig. 5 is an enlarged sectional view taken along the - line in Fig. 4. FIG. 3 is an enlarged cross-sectional view of main parts. 6 and 7 are respectively a front view and a sectional view of the main part of a conventional material transfer device, and FIGS. FIG. 9 is a schematic diagram illustrating the relationship between the opening and closing operations, and FIG. 9 is a time chart showing the opening and closing period of the material transfer chuck in synchronization with the forward and backward movement of the punch when molded products with different axial lengths are forged. 3...Die, 5...Punch, 10...Material transfer chuck, 14...Camshaft, 24a, 24b...
...Opening/closing cam member, 25...Followed member (cam follower), 34...Gear member, 35...Fixing means,
36...Cylinder, 37...Piston, 44...
Drive gear, 45...Rotation operation means, drive motor,
46...control means (control unit),
~... Heading station.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of forging stations equipped with opposing dies and punches, and a plurality of forging stations that reciprocate in the direction in which these forging stations are lined up to sequentially transfer the material to each of the forging stations. A material transfer device for a multi-stage heading forming machine, which has a material transfer chuck, and a camshaft that rotates in synchronization with the forward and backward movement of the punch, and a camshaft that corresponds to each of the material transfer chucks. The camshaft is provided with a pair of opening/closing cam members provided on the camshaft, and a plurality of driven members that open/close the respective material transfer chucks by being driven as the opening/closing cam members rotate. is movable in parallel in a direction away from the driven member, and the pair of opening/closing cam members are individually phase adjustable with respect to the cam shaft, and each of the pair of opening/closing cam members has a A gear member fixedly installed to rotate integrally with the member, a drive gear that engages with the gear member as the camshaft moves in a direction away from the driven member, and by rotating the drive gear. Multi-stage forging, characterized in that it is equipped with a rotation operating means for changing the phase of the pair of opening/closing cam members, and a fixing means for fixing each pair of opening/closing cam members on the camshaft to the camshaft. Material transfer device for molding machine. (2) It has a plurality of forging stations equipped with opposing dies and punches, and a plurality of material transfer chucks that reciprocate in the direction in which these forging stations are lined up to sequentially transfer the material to each forging station. A material transfer device for a multi-stage heading forming machine, which includes a camshaft that rotates in synchronization with the advancing and retracting movement of the punch, and a pair of opening/closing chucks provided on the camshaft corresponding to each of the material transfer chucks. and a plurality of driven members that open and close the respective material transfer chucks by being driven as the opening/closing cam members rotate, and the camshaft is moved in a direction away from the driven members. The pair of opening/closing cam members are capable of parallel movement, and the phase of the pair of opening/closing cam members can be adjusted individually with respect to the cam shaft, and each of the pair of opening/closing cam members is fixed to rotate integrally with the cam member. a drive gear that engages with the gear member as the camshaft moves away from the driven member; and a drive gear that engages the gear member as the camshaft moves away from the driven member; A drive motor that changes the phase, and a drive motor that rotates a drive gear so that the period of opening and closing of each of the material transfer chucks is a predetermined period that is preset according to the axial length of the molded product to be forged. 1. A material transfer device for a multi-stage heading forming machine, comprising: a control means for controlling the operation of the camshaft; and a fixing means for fixing each pair of opening/closing cam members on the camshaft to the camshaft. (3) The fixing means includes cylinders fixed to the sides of each pair of opening/closing cam members on the camshaft, and within each of these cylinders, the fixing means rotates integrally with the camshaft, and is located at the axis of the camshaft. Claim 1 of the utility model registration claim 1 or claim 1 of the utility model registration claim 1, comprising a piston that is slidably inserted in the direction and fastens each pair of cam members to the cam shaft. A material transfer device for a multi-stage heading molding machine according to item 2.