JPH03272Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is installed in a multi-stage heading molding machine, and transfers the material supplied from one side of the molding machine from rough to fine parts arranged in parallel to the die block. The present invention relates to a material transfer device that sequentially transfers a material between a plurality of heading dies.

(Prior art) Generally, in a multi-stage heading forming machine, the material supplied from one side of the machine is passed through a plurality of heading dies ranging from rough to fine headings installed in parallel on a die block, and to each of these heading dies. It is configured to form bolts, nuts, or various parts by sequentially forming the forging process in stages between the forging punches arranged opposite to each other.

In this case, a material transfer device is provided to sequentially transfer the material between a plurality of heading dies ranging from coarse to fine heading dies, and this material transfer device is usually as shown in FIGS. 6 and 7. , dive block 5
A movable frame 52 is slidably supported (in the left-right direction in FIG. 6) within a fixed frame 51 whose front end is placed on top of the movable frame 52, and a plurality of shafts 53a...53a are installed on the front surface of the movable frame 52. and 53b...5
A pair of left and right material transfer chucks 54a, 54b rotatably attached via the shafts 53 and 3b.
It is composed of a pair of segment gears 55a and 55b (only one of which is shown in FIG. 7) that are fixedly installed on the shafts 53a and 53b, respectively, and always mesh with each other, and a roller 56 that is installed at the rear end of one shaft 53a.

The cam 5 fixed on the cam drive shaft 57
8 and attach the cam follower 5 to the cam 58.
swinging the bracket 60 that abuts via 9;
By pressing down the roller 56 installed at the rear end of the shaft 53a using a pressing plate 61 fixed to the tip of the bracket 60, the shaft 53a
In addition, the shaft 53b rotates in a predetermined direction via a pair of segment gears 55a and 55b that are respectively fixedly connected to the punch 6 to move the pair of left and right material transfer chucks 54a and 54b, which are normally closed, to the punch 6.
2 is opened as shown in FIG. 6. As a result, the material (not shown) supplied from one side of the machine is captured between the chucks 54a and 54b whose lower sections are closed, and as the movable frame 52 moves forward. The material is transferred to the front of each of the adjacent forging dies 63, 63 arranged in parallel with the die block 50, and just before the material is driven into the forging die 63 by the forging punch 62, the pair of left and right chucks 54a, 54b are opened to perform heading. The chucks 54a and 54b are retracted from the punch 62 and then returned to their original positions as the movable frame 52 moves back again.

(Problems to be Solved by the Invention) By the way, in the above material transfer device, the pair of left and right material transfer chucks 54a, 54b are designed to open and move around the respective shafts 53a, 53b. As shown in the figure, the heading die 6
However, since the shafts 53a and 53b are in fixed positions on the front surface of the movable frame 52, the tips of the chucks 54a and 54b can be opened relatively widely in the width direction. It has to be small. For this purpose, for example, as shown by the chain line in FIG. 6, a recess (seventh
(see figure), when molding a product having a head W with a relatively large diameter, as the movable frame 52 moves back, the pair of left and right material transfer chucks 54a and 54b move back to the original position. When attempting to return to the position shown in FIG. It will not be possible to return it to its original position. Even if an attempt is made to open each chuck 54a, 54b further to avoid such a situation, adjacent chucks will collide with each other, so each chuck 54a, 54b will be opened sufficiently until the above situation can be avoided. It becomes impossible to open the door wide.

Therefore, the present invention provides a material transfer device for a multi-stage heading forming machine by increasing the opening range of the pair of left and right chucks that make up the material transfer device, especially the upward rotation range of the tip of each chuck.
It is an object of the present invention to provide a material transfer device suitable for use when forging a product having a large diameter head, for example, between the front surface of a forging die and a recess formed at the tip of a forging punch.

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

That is, a die block in which a plurality of forging dies ranging from rough to fine forging dies are arranged in parallel, a fixed frame whose front end is placed on the die block and whose rear end is pivoted behind the die block, and the fixed frame. Material transfer of a multi-stage heading forming machine having a movable frame slidably supported in the direction in which the heading dies are arranged side by side, and a drive means for driving the movable frame to reciprocate between adjacent heading dies. In the apparatus, a slider is held on the front surface of the movable frame so as to be movable up and down, and an elastic member is provided between the slider and the movable frame to constantly bias the slider downward, and the back surface of the slider is provided with an elastic member that constantly urges the slider downward. An elevating member that can move up and down in a groove formed in the movable frame is fixed to the movable frame. Further, driving means is provided on the fixed frame side for moving the slider upward against the elastic member by moving the elevating member upward along the groove.

On the other hand, a pair of left and right material transfer chucks are supported in a crosswise manner and rotatably via a base shaft fixed to the lower end of the slider, and a pair of left and right link members are attached to the lower left and right ends of the block. Each one end is rotatably pivotally connected, and each other end is rotatably pivotally connected to each upper end of the pair of chucks.

(Function) According to the above configuration, the material supplied from one side of the machine is captured between the pair of left and right material transfer chucks that are normally closed, and the material is transferred to the forward movement of the movable frame. The material is then transferred to the front side of an adjacent forging die, and then, just before the material is driven into the forging die by the forging punch, both chucks are opened in the left and right direction to retreat from the forging punch. This evacuation operation is performed as follows. That is, when the elevating member fixed to the back of the slider is raised by the drive means provided on the fixed frame side, the slider rises against the elastic member, which causes the slider to rise. The entire pair of left and right chucks, which are supported in a crosswise manner via a base shaft fixed to the lower end, are moved upward. In addition, the upper end of each chuck is rotatably connected to the other end of a pair of link members whose one end is rotatably connected to the movable frame, so that as the slider rises, the left and right While the entire chuck moves upward, each chuck opens and moves left and right. Therefore, it is possible to move the pair of chucks not only in the left-right direction but also in the upward direction, and as a result, for example, between the front surface of the forging die and the recess formed at the tip of the forging punch facing thereto, Even when forging a product with a large diameter head, when the material device returns to its original position with the return movement of the movable frame, each tip of the pair of left and right chucks that make up the material transfer device There is no possibility of collision with the head of the product that protrudes from the front of the heading die.

(Example) Next, a specific example of the present invention will be described based on the drawings.

FIG. 1 is a plan view of the main parts of a multi-stage heading molding machine equipped with the material transfer device of the present invention, and FIG. 2 is a front view of the main parts.

First, to explain this multi-stage heading molding machine, the die block 2 installed on the machine stand 1 of this molding machine has a plurality of die blocks (four in the example) ranging from coarse to fine.
Heading dies 3...3 are held at regular intervals,
The ram 4, which is installed in front of the die block 2 and reciprocates toward the die block 2, has the same number of forging punches 5...5 as the forging dies 3...3 so as to face each of the forging dies 3...3, respectively. is maintained.

Furthermore, by inserting the movable frame 7 into the upper and lower grooves 6a and 6b formed so as to face each other on the upper and lower inner surfaces of the front end portion of the fixed frame 6 placed on the die block 2, the movable frame 7
is slidably supported on the fixed frame 6. Further, at one end of the movable frame 7, there is a drive rod 8 that advances and retreats in a direction perpendicular to the reciprocating direction of the ram 4 (left-right direction in FIGS. 1 and 2) in synchronization with the reciprocating movement of the ram 4. By being connected via pins 9, the movable frame 7
are reciprocated once during the time when the ram 4 is retracting by a distance equal to the distance between adjacent heading dies 3...3.

However, in this embodiment, a plurality of material transfer devices 10...10 are installed on the front surface of the movable frame 7. For example, each of these transfer devices 10 has a slider 12 which is movable up and down within a block 11 that is integrally formed on the front surface of the movable frame 7.
(see Figures 3 and 4), and a guide rod 13 is fixedly attached to the upper end of the slider 12, and around the outer periphery of the guide rod 13, the slider 12 is constantly urged downward. A spring 14 is installed. Further, as shown in FIG. 4, an elevating rod 15 is fixed to the back surface of the slider 12, and this elevating rod 15 extends rearward through a vertical groove 7a formed in the movable frame 12. . The tip of the lifting rod 15 is engaged with one end of a lever 17 (see FIG. 1) rotatably attached to the back surface of the movable frame 7 via a pin 16, and the lever 1
A roller 18 is integrally attached to the other end of the roller 7.

On the other hand, a pair of left and right material transfer chucks 20a and 20b are rotatably supported in an intersecting manner via a base shaft 19 fixed to the lower end of the slider 12, and at the lower left and right ends of the block. One end of the pair of left and right link members 21a, 21b is rotatably attached via pins 22a, 22b, and the other end is rotatably attached to the upper ends of the chucks 20a, 20b via pins 23a, 23b, respectively. It is worn.

Further, on the machine base 1 at the rear of the die block 2, a horizontal cam drive shaft 25 is arranged parallel to the fixed frame 6 and pivotally supported by brackets 24, 24 provided on the machine base 1. A chuck opening/closing cam 26 is fixed on this cam drive shaft 25, and a cam follower 27 that contacts this cam 26 is attached to one side of a bracket 29 that is swingably supported on the fixed frame 6 via a shaft 28. The bracket 29 swings with the rotation of the cam 26, which causes the press plate 30 attached to the tip of the bracket 29 to
However, the roller 18 of the lever 17 rotatably supported on the back surface of the movable frame 7 via a pin 16 is pushed down as shown by the chain line in FIG. As a result, the lever 17 rotates in a predetermined direction, and the lifting rod 15 whose tip is engaged with one end of the lever 17 rises along the vertical groove 7a, causing the slider 1
2 will move upward against the spring 14.

Furthermore, in this embodiment, a pin 31 is attached to the front surface of the slider 12, as shown in FIG.
The pair of left and right chucks 20a, 20b are pressed down by the support plate 32 engaged through the support plate 32, a press plate 34 is inserted between the support plate 32 and the set bolt 33, and the set bolt 33 is tightened. is prevented from slipping out from the base axis 19. In addition,
Since the pressing plate 34 has a slit 34a and the support plate 32 has a hole 32a having a diameter larger than the head of the set bolt 33, loosen the set bolt 33 and move the pressing plate 34 upward. By pulling it out, it becomes possible to remove the support plate 32 while leaving the set bolt 33 screwed to the slider 12, which allows the pair of left and right chucks 20a, 20 to be removed.
b can be easily removed from the base shaft. In this way, for example, the chucks 20a, 2
When the chuck 0b is damaged or broken due to an unexpected situation, the replacement work of the chucks 20a and 20b can be performed extremely easily and in a short time.

Next, to explain the operation of this embodiment, the material extruded from the heading die 3...3 (not shown)
is captured between the left and right chucks 20a and 20b, which are normally closed as shown in FIG. Immediately before the material is driven into the forging die 3...3 by the forging punches 5...5, both chucks 20a, 20b are transferred to
is opened in the left-right direction and retracted from the forging punches 5...5. This evacuation operation is performed as follows.
That is, as shown in FIGS. 3 and 4, the cam 2
By moving the pressing plate 30 downward in the bracket 29 which is swung by the lever 17
When the elevating rod 15 whose tip is engaged with the elevating rod 15 is rotated in a predetermined direction, the slider 12 integrated with the elevating rod 15 rises. The pair of left and right chucks 20a and 20b, which are supported in an intersecting manner, are entirely moved upward via the base shaft 19. Moreover, the upper end portions of each chuck 20a, 20b are connected to a pair of left and right link members 21a, 21b, which are pivotally connected to the left and right lower end portions of the block 11, respectively.
The slider 1 is rotatably connected to one end of the slider 1 via pins 23a and 23b.
2, a pair of left and right chucks 20a,
While the whole of 20b moves upward, each chuck 2
0a, 20b are the pair of link members 21a, 2
As 1b opens, it opens in the left and right direction. Therefore, it is possible to move the chucks 20a and 20b not only left and right, but also upward, and as a result, for example, as shown in FIGS.
As shown in the figure, the movable frame 7 When the material transfer device returns to its original position due to the backward movement of
The tip of b will not collide with the head W of the product, which is in a state of protruding from the front surface of the heading die 3.

As shown in FIG. 5, a roller is attached to the tip of an elevating rod 15' that is fixed to the back surface of the slider 12' and protrudes rearward through a vertical groove 7a' formed in the movable frame 7'. 18' may be pivotally mounted and the roller 18' may be directly driven by the bracket 29'. In this case, the slider 12' moves upward inside the block 11' via the lifting rod 15' by rotating the pressing plate 30' fixed to the tip of the bracket 29' upward by the cam 26'. The slider 12' is to be moved to the base axis 1.
The pair of left and right material transfer chucks 20a' and 20b' supported through the chucks 9' are opened left and right while moving upward.

(Effects of the invention) As described above, the present invention, in the material transfer device of a multi-stage heading forming machine, allows the tips of the pair of left and right chucks that make up the transfer device to move significantly not only in the left and right direction but also upward. Therefore, by installing the material transfer device of the present invention, it is possible to form products with large diameter heads that could not be forged with multi-stage heading molding machines equipped with conventional material transfer devices. Therefore, the versatility of this type of multi-stage heading molding machine equipped with the material transfer device is further improved.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the main parts of a multi-stage heading forming machine equipped with the material transfer device of the present invention, Fig. 2 is a front view of the main parts, and Fig. 3 shows the material transfer device of the present embodiment. An enlarged front view, FIG. 4 is a cross-sectional view taken along the line of FIG. 3, and FIG. 5 is a fourth diagram showing another embodiment.
6 and 7, which are similar to the figure, are a front view and a sectional view of a main part of a conventional material transfer device. 1... Machine base, 2... Die block, 3... Heading die, 5... Heading punch, 6... Fixed frame,
7...Movable frame, 10...Material transfer device, 1
1...Block, 12...Slider, 13...
Guide rod, 14... Spring (elastic member), 15
...Elevating rod (elevating member), 17... Lever, 20a, 20b... Material transfer chuck, 2
1a, 21b... link member, 26... cam, 2
9... Swing bracket.

Claims (1)

[Scope of utility model registration request] A die block in which a plurality of forging dies ranging from rough to fine heading dies are arranged side by side, a fixed frame whose front end is placed on the die block and whose rear end is pivoted on a machine stand behind the die block; A multi-stage heading forming machine having a movable frame supported by a fixed frame so as to be slidable in the direction in which the forging dies are arranged side by side, and a driving means for driving the movable frame to reciprocate between adjacent forging dies. The material transfer device includes a slider held movably up and down on the front surface of the movable frame, an elastic member installed between the slider and the movable frame to constantly bias the slider downward, and the above-mentioned The slider has a lifting member that is fixed to the back of the slider and can move up and down in a groove formed in the movable frame, and a lifting member that is installed on the fixed frame side and moves up and down along the groove. a drive means for moving the material upward against an elastic member; a pair of left and right material transfer chucks each rotatably supported in a crosswise manner via a base shaft fixed to the lower end of the slider; It is comprised of a pair of left and right link members, one end of which is rotatably supported on the movable frame side, and the other end of which is rotatably connected to each upper end of the pair of left and right chucks. Features a material transfer device in a multi-stage heading molding machine.