JPH0335463Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is designed to create a bond between a plurality of forging dies arranged in parallel at regular intervals and a forging punch arranged to face each of these forging dies. In a multi-stage heading forming machine, the material supplied from one side of the machine is sequentially transferred between each heading die using a plurality of material transfer chucks, and subjected to heading processing in stages to form a product of a predetermined shape. Each of the above-mentioned forging dies, forging punches, and material transfer chucks is conveyed to a predetermined position on the machine base 2 and the ram by the conveyor 32 in the reverse procedure to the above, and each of these blocks 8 ', 3', and 6' can be mounted on the machine base 2 and the ram 5, respectively.

Furthermore, since each of the turntables 40, 41, and 42 is rotatable, for example, as shown in FIG.
At the top, a worker turns the turntable 40,
Each block 8, 4, 6 placed on 41, 42
A plurality of material transfer chucks 14 each equipped with
...14, relates to a device that automatically replaces all the forging dies, forging punches, and material transfer chucks for each forging die 4...4 and forging pan block.

(Prior art) Generally, in a multi-stage heading forming machine, a plurality of heading dies ranging from coarse to fine are arranged in parallel at regular intervals on a die block equipped on the machine base, and adjacent heading dies are arranged side by side at regular intervals. The same number of material transfer chucks as the forging dies are attached to the front of the movable frame, which is supported by chuck blocks so as to reciprocate. While sequentially transferring to the heading die,
Bolts, nuts, or various parts are formed by forging the material in stages using a plurality of forging punches disposed so as to face each of the forging dies. For example, as in the invention described in JP-A-59-118240,
Among the forging tools installed in a Homa (multi-stage forging machine), a system is provided that automatically replaces only certain forging punches, such as trimmer punches, which are subject to particularly severe wear and tear. Therefore, when the specific forging punch becomes worn out, it is designed to be quickly replaced and to shorten this type of replacement work.

Also, for example, the 60-year Utility Model.

In addition, as shown in FIG.
The arrangement 30a of each turntable 40, 41, 42 in
It may also be used as a storage for various tools such as 7'.

(Effects of the invention) As described above, the present invention provides a multi-stage heading molding machine in which all the punches and dies and material transfer chucks for each block in which a plurality of punches and dies and material transfer chucks are respectively disposed. Since it is configured so that it can be replaced all at once and automatically, for example, when a single multi-stage heading molding machine is used to mold various products with different shapes, it is possible to use multiple heading There is also a method in which all the forging punches are replaced together with the punch holder to which the punches are fixed, thereby shortening the replacement work time in the same manner as described above.

(Problems that the invention attempts to solve) In recent years, in order to respond to the trend of high-mix, low-volume manufacturing, a single multi-stage heading molding machine has been used to mold various types of parts. Productivity is being improved by reducing equipment costs and increasing the versatility of this type of heading forming machine, but it is now possible to form various products with different shapes using a single multi-stage heading forming machine. In such cases, it is necessary to replace all of the multiple forging punches installed in the molding machine, the forging dies arranged to face them, and the material transfer chuck to accommodate products of various shapes. There is. In this case, if multiple forging punches were replaced one after another as in the conventional example above, it would take too much time to replace them, and even if the punch holder is fixed with multiple forging punches Even if you replace all the forging punches at once, you may have to replace multiple forging dies and material transfer chucks individually afterwards.
This kind of exchange work will be unnecessarily prolonged,
Moreover, during that time, the forging machine was naturally forced to stop, which significantly reduced the operating efficiency of the forging machine.

Furthermore, the replaced forging punches, forging dies, and material transfer chucks are maintained and inspected in preparation for their next use, and it has been an issue to make this work easier.

Therefore, the present invention aims to form various products with different shapes using a single multi-stage heading forming machine. In addition, when replacing the material transfer chuck, all of the forging dies, forging punches, and material transfer chucks are automatically replaced for each block equipped with a plurality of forging dies, forging punches, and material transfer chucks, respectively. By providing equipment,
It is an object of the present invention to significantly shorten the time required for this kind of replacement work, and to enable efficient maintenance and inspection work on replaced forging dies, forging punches, and material transfer chucks.

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

In other words, there is a die block that is detachably attached to a predetermined position on the machine base and holds a plurality of dies ranging from coarse to fine in parallel at regular intervals, and a die block that is detachably attached to the machine base and holds the same number of dies as the dies. A chuck block that supports chucks for transferring the same number of materials so as to be able to reciprocate in the direction in which the dies are arranged side by side; In an automatic tool change device for a multi-stage heading forming machine, which has a punch block to which a punch is fixedly attached, an exchange station is provided on the side of the machine base, and these tools are installed so as to straddle the exchange station and the machine base. A single transport body common to each block that travels on a transport rail installed above and transports each block between the mounting position of each block on the machine base and ram and the tool delivery position on the exchange station. a die block turntable on which the die block mounted on the machine stand and a replacement die block are placed, and a chuck block mounted on the machine stand and a replacement chuck block on the exchange station. A turntable for a chuck block to be replaced and a turntable for a punch block on which a punch block mounted on the ram and a replacement punch block are placed are arranged in parallel, and each of these tables is arranged between the above-mentioned transport means. The present invention is characterized in that it is provided with a moving means for moving the blocks between a delivery position where each block can be delivered and a retreat position.

(Function) According to the above configuration, each block to which a plurality of material transfer chucks, dies, and punches are respectively attached is removably installed at predetermined positions of the machine base and the ram, and the machine base is and the exchange station installed on the side of this,
A transport rail is constructed to straddle them,
Further, a single conveyance body common to each block is equipped, which travels on the conveyance rail and conveys each block between the mounting position of each block and the tool delivery position at the exchange station, and A die block turntable on which the die block mounted on the machine base and a replacement die block are placed, and a chuck block turntable on which the chuck block installed on the machine base and a replacement chuck block are placed on the top. and a punch block turntable on which the punch block mounted on the ram and a replacement punch block are placed are arranged in parallel, and each table is connected to the conveying means to transfer each block. A delivery position where delivery can be made,
Since a moving means is provided to move the blocks to and from the retracted position, each block is removed from the machine base and ram, transported by a conveyor, and placed on a dedicated turntable for each block. At the same time, each block prepared in advance for replacement can be carried by a carrier to a predetermined position on the machine stand and ram, and can be mounted on the machine stand and ram. As a result, the replacement work of tools such as multiple material transfer chucks, dies, and punches can be done easily and quickly, and moreover, unattended, and the time required to replace these types of tools is reduced compared to conventional methods. It is possible to significantly shorten the time. Furthermore, it becomes possible to perform maintenance and inspection work on the replaced tools by rotating each of the turntables in any direction and replacing them, thereby improving the workability.

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

FIG. 1 is a schematic plan view of an automatic tool changing device for a multi-stage heading forming machine according to the present invention and a heading forming machine equipped with the device, and the second and third are the same as those shown in FIGS. 1 and 3, respectively. FIG.

As shown in FIG. 1, a die block 3 mounted at a predetermined position on the machine base 2 in the multi-stage heading forming machine 1 of this embodiment has a plurality of heading dies 4...4 (a third A punch block 6 is mounted on the front of a ram 5 which is mounted on the machine base 2 in front of the die block 3 and reciprocates toward the die block 3. The same number of forging punches 7...7 as the forging dies 4...4 are fixedly installed on the punch block 6 so as to face the forging dies 4...4, respectively.

Further, a chuck block 8 is mounted on the machine base 2, and the front end of the chuck block 8 is placed on the die block 3 as shown in FIGS. The rear end portions of left and right arm portions 8a, 8a provided on the machine base 2 are removably engaged with square shaft portions 9a, 9a of a support shaft 9 rotatably supported at the rear of the machine base 2, respectively. . A movable frame 10 is slidably supported at the front end of the chuck block 8, and at one end of the movable frame 10,
One end is fixed to an eccentric shaft 13 on the side of the machine so that it moves forward and backward in a direction perpendicular to the reciprocating direction of the ram 5 (left-right direction in Figures 1 and 3) in synchronization with the reciprocating movement of the ram 5. The other end of the driven rod 11 is connected via a pin 12, so that the movable frame 10 can be connected to the adjacent heading die 4,
The ram 5 is reciprocated by a distance equal to the interval of 4 during the retracting time of the ram 5.

On the front surface of the movable frame 10, there are a plurality of material transfer chucks 14...14 in pairs on the left and right sides.
The chucks 14...14 are installed in the same number as the plurality of forging dies 4...4 at the same intervals as the plurality of forging dies 4...4, and as the movable frame 10 moves back and forth, the chucks 14... . 16...
It is designed to be opened and operated by 16 etc. Further, a driving gear 15a for driving the camshaft 15 is fixed to the shaft end of the camshaft 15.

Furthermore, as shown in FIG. 1, a suitable drive source for rotating the support shaft 9 is provided at the shaft end of the support shaft 9, to which the rear ends of the arm portions 8a, 8a of the chuck block 8 are respectively engaged. For example, a gear such as a worm wheel 19 that is constantly meshed with a worm gear 18 driven by a motor 17 capable of forward and reverse rotation is fixed, so that the entire chuck block 8 is connected to the movable frame 10 and the camshaft 1.
5, it is configured to rotate upwardly about the square shaft portions 9a, 9a of the support shaft 9 as shown by chain lines in FIG. Note that the stoppers 20, 20 for regulating the upward rotation range of the chuck block 8 are provided on the support shaft 9 on the machine base 2.
It is located at the rear of the

In the present invention, each of the die block 3, punch block 6, and chuck block 8 is removably attached to a predetermined position of the machine base 2 or ram 5 via fixing means driven by hydraulic pressure. That is, as shown in FIGS. 2 and 3, a plurality of grooves 3a...
3a is formed, and a clamping device 21 consisting of a hydraulic cylinder is installed in the machine base 2 behind each groove 3a, and each piston rod 21a constituting these clamping devices 21
pass through each groove 3a, and the large-diameter heads 21b...21b at the tips thereof are engaged with the front surface of each groove 3a in the die block 3, thereby fixing the die block 3 to the machine base 2. It is set up. Then, the piston rod 21a of the clamping device 21 is driven by hydraulic pressure to lock the die lock 3.
By releasing the engagement with the die block 3, the entire die block 3 can be moved upward and removed from the machine base 2. Also, on the other hand, the second
As shown in the figure, a plurality of grooves 6a (only one is shown) are formed in the punch block 6 below between the positions where the forging punches 7, 7 are disposed.
A clamping device 22 consisting of a hydraulic cylinder is installed in each of the rams 5 at the rear of the ram 5, and a piston rod 22a of the clamping device 22 passes through the groove 6a, and a large-diameter head 22b at the tip thereof. The engagement lever 23b, which is rotatably attached to the tip of the piston rod 23a of the clamping device 23, which is a hydraulic cylinder mounted on the upper part of the ram 5, presses and holds the front surface of the punch block 6. The punch block 6 is fixed to the front surface of the ram 5 by pressing the upper surface of the ram 5. Then, the engagement of each of the clamp devices 22 and 23 with the punch block 6 is released, and the piston rod 2
The entire punch block 6 can be removed from the ram 5 by half-turning the engagement lever 23b attached to the tip of the punch block 6 in a direction away from the upper surface of the punch block 6. Furthermore, the chuck block 8 has its rear end removably engaged with the square shafts 9a, 9a of the support shaft 9, as described above, and the left and right upper surfaces of its front end, as shown in FIG. They are fixed by piston rods 25a, 25a in locking members 25, 25, such as hydraulic cylinders, which are disposed at predetermined positions on the machine base 2 via brackets 24, 24, respectively. By hydraulically retracting the piston rods 25a, 25a of the locking members 25, 25, the entire chuck block 8 can be removed from the machine base 2.

The connecting portion between the movable frame 10, which is reciprocatably supported by the front end of the chuck block 8, and the drive rod 11 for reciprocating the movable frame 10 is connected to hydraulic means, as shown in an enlarged view in FIG. They are removably connected via the. That is, a connecting portion 26 that engages with the pin 12 fixed to one end of the movable frame 10 is fixedly provided at the tip of the driving rod 11.
A base portion 27 integrally attached to the tip of 1
A hook member 27a is rotatably supported on the base member 27 about a fulcrum pin 28 and engages with the pin 12, and the hook member 27a and the base member 27 have a front end portion and a rear end portion. and a hydraulic cylinder 29 which is rotatably supported. Then, by driving the hydraulic cylinder 29, the hook member 27a is rotated as shown by the chain line to release the engagement with the pin 12, and the drive rod 11 is fixed at one end. The movable frame 10 and the drive rod 11 can be disconnected from each other by rotating the movable frame 10 about the eccentric shaft 13 (see FIG. 1) in the direction shown by arrow A.

However, an exchange station 30 is provided on the side of such a multi-stage heading forming machine 1, and an exchange station 30 is provided on a conveyor rail 31 constructed above the station 30 and the heading forming machine 1 so as to straddle them. A transport body 32 is installed in the transport body 32 . This conveying body 32 has a plurality of rollers 33 .
4, 34, etc., the chuck block 8 and die block 3 in the machine base 2 and the ram 5 are moved on the conveyor rail 31.
The punch block 6 is also reciprocated between the mounting position of the punch block 6 and the station 30. Furthermore, hydraulic cylinders 35 and 36 that are vertically expandable and retractable are fixedly installed on the lower surfaces of both sides of the carrier 32, and each hydraulic cylinder 35, 3
Engagement members 37 and 38 are fixed to the lower end portions of 6, respectively. One of the engaging members 37 is integrally formed on the upper surface of the chuck block, and is integrally formed in the pair of left and right engaging pieces 8b, 8c, and the upper surface recess of the die block 3, and is integrally formed in the upper surface of the die block 3.
b, 3c, and the other engaging member 38
are engaged with engaging pieces 6b and 6c integrally formed on the upper surface of the punch block 6, so that the chuck block 8, die block 3, and punch block 6 can be removed from the machine base 2 or the ram 5. .

Here, using FIG. 3, one of the engaging members 37
To explain the internal structure of the engaging member 37,
A pair of left and right piston members 37a, 37a, which are moved forward and backward by hydraulic pressure, are interposed inside the engaging member 37, and recesses 37b, 37b are formed near both sides of the engaging member 37, respectively. The recess 3
Engagement pieces 8 formed on the upper surfaces of the chuck block 8 and die block 3, respectively, in 7b and 37b.
b, 8c and 3b, 3c are fitted into each other. Then, the tips of the piston members 37a, 37a are engaged with the through holes formed in the engaging pieces 8b, 8c and 3b, 3c, respectively, and then the engaging members 37 are inserted into the hydraulic cylinder 35. The chuck block 8 and the die block 3 are removed from the machine base 2 by raising the chuck block 8 and the die block 3 to the machine base 2. Although not shown, the other engaging member 38 has a similar configuration,
This allows the punch block 6 to be removed from the ram 5.

On the station 30, the blocks 8, 3, 6 and the replacement blocks 8', 3', 6' for replacing each of these blocks are disposed.
turntables 40, 41, 42 for each block, each for a chuck block, for a die block, and for a punch block, on which a turntable is placed;
are arranged in series, and each of these turntables 4
0, 41, 42 are two guide rails 43 installed in parallel between both ends of the exchange station 30,
Each base 40 is movable forward and backward along 43.
a, 41a, 42a, and
Each turntable 40, 41, 42 is rotatable about a rotating shaft 40b, 41b, 42b, respectively. As a result, each of these tables 4
0, 41, and 42 as appropriate,
Each block can be delivered to and from the carrier 32.

Next, the operation of this embodiment will be explained. First, each piston rod 25 of the lock members 25, 25 fixes the upper front end portion of the chuck block 8.
a, 25a respectively, and the lock member 2
5 and 25, the carrier 32 is moved along the carrier rail 31, and one engaging member 37 of the carrier 32 is positioned directly above the mounting position of the chuck block 8 on the machine base 2. position. Then, by extending the piston rod 35a using the hydraulic cylinder 35 and moving the engaging member 37 fixedly attached to the tip of the piston rod 35a downward, the engaging member 37 is engaged with each of the engaging pieces 8b and 8c of the chuck block 8. Match. Then, with the piston rod 35a retracted and the entire chuck block 8 suspended, the carrier 32 is moved again.
is located on the exchange station 30. At this time, by positioning the chuck block turntable 40 directly below the carrier 32, the chuck block 8 suspended by the engaging member 37 is placed on the table 40 as shown in FIG. 5A. can do. After that, the carrier 32 is moved again, and each engaging member 37 on the carrier 32,
38 are located directly above the mounting positions of the die block 3 and punch block 6 on the machine base 2 and the ram 5, respectively, and each of the above-mentioned clamp devices 2
After releasing the engagement of the die block 3 and the punch block 6 by the engagement members 37 and 38, the die block 3 and the punch block 6 are moved to the carrier 3 in the same manner as described above.
2 onto the exchange station 30. By positioning the die block turntable 41 and the punch block turntable 42 directly above the respective engaging members 37 and 38, the die block 3 and punch block 6 can be
As shown in Fig. 5B, each turntable 4
1,42.

And a turntable 40 for each block,
41 and 42 are respectively indicated by arrows X _{1 and 42} as shown in FIG.
_A plurality of _material transfer chucks 14'...14', heading dies 4'...4' and Replacement chuck blocks 8' each equipped with a forging punch 7'...7',
Dive block 3' and punch block 6ch 7...
When carrying out the adjustment or inspection work described in item 7, these works can be performed easily.

Furthermore, as shown in FIG. 5D, each turntable 4 for the die block and punch block
1,42 close together and 4 on each of these tables.
By arranging the die blocks 3 and punch blocks 6 placed on the die blocks 1 and 42, respectively, to face each other, the forging dies 4, 4 and the forging punches installed on the die blocks 3 and punch blocks 6, respectively, can be removed in preparation for the next replacement. 7, 7 and its inspection can be done in advance before mounting on the machine base 2 and ram 5. For convenience, the above-mentioned punches and dies and material transfer can be adjusted for each product. In cases such as replacing a brake chuck, the replacement work can be done automatically, easily and quickly. As a result, the time required for this kind of replacement work has been significantly shortened compared to the conventional method, and the operating efficiency of the multi-stage heading molding machine has been dramatically improved, resulting in a significant increase in productivity. Become.

In addition, it becomes possible to perform maintenance and inspection work on tools such as replaced punches, dies, and material transfer chucks by rotating each of the turntables in any direction, thereby improving work efficiency. become.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic plan view of a multi-stage heading molding machine equipped with an automatic tool changer according to the embodiment, and FIGS. 2 and 3 are respectively similar to FIG. 1. - and - An enlarged sectional view of the main part seen from the cutting line, FIG. 4 is an enlarged sectional view of the main part seen from the cutting line of FIG. FIG. 3 is a schematic plan view showing the replacement work process. 1...Multi-stage heading molding machine, 2...Machine stand, 3...
Die block, 4... Heading die, 5... Ram, 6
...Punch block, 7... Heading punch, 8...
Chuck block, 14... material transfer chuck, 21, 22, 23... clamping device, 30...
... Exchange station, 31 ... Transport rail, 32
...Conveyor, 37, 38...Engagement member, 40...
Turntable for chuck block, 41... Turntable for die block, 42... Turntable for punch block, 40a, 41a, 42
a, 43... Transportation means, 40a, 41a, 42a
...Base, 43...Guide rail.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A die block that is detachably attached to a predetermined position on a machine base and holds a plurality of dies ranging from coarse to fine in parallel at regular intervals, and a die block that is detachably attached to the machine base. A chuck block is attached to the chuck block and supports the same number of material transfer chucks as the dies in a reciprocating manner in the direction in which the dies are arranged side by side, and the chuck block is detachably attached to a ram installed on the machine base so as to face the die blocks. Also, an automatic tool changing device for a multi-stage heading forming machine having a punch block to which the same number of punches as the die is fixed, wherein a changing station is provided on the side of the machine base, and Each block is transported between the installation position of each block on the machine stand and ram and the tool delivery position at the exchange station by traveling on a transport rail installed above the exchange station and machine base so as to straddle these. a single carrier common to each block;
On the exchange station are a die block turntable on which the die block mounted on the machine base and a replacement die block are placed, and a chuck block turntable on which the chuck block mounted on the machine base and a replacement chuck block are placed. A turntable and a punch block turntable on which the punch block mounted on the ram and a replacement punch block are placed are arranged in parallel, and each of these tables is connected to the transport body. An automatic tool changing device for a multi-stage heading forming machine, characterized in that it is provided with a moving means for moving blocks between a delivery position where blocks can be delivered and a retreat position. (2) The chuck block, the die block, and the punch block are each removably attached to predetermined positions on the machine base and the ram by hydraulically driven fixing means, and the carrier has an engaging portion with each block, An automatic tool changing device for a multi-stage heading forming machine as set forth in claim 1, wherein the engaging portion is configured to be driven by hydraulic pressure. (3) The automatic tool changing device for a multi-stage heading forming machine as set forth in claim 1 of the utility model registration, characterized in that the installation part of each turntable in the changing station is a tool storage. (4) The die block turntable and the punch block turntable at the exchange station move the die blocks and punch blocks mounted on each block toward each other, and the die blocks and punch blocks mounted on each of these blocks are replaced with each other. An automatic tool changing device for a multi-stage heading forming machine as set forth in claim 1, characterized in that it is movable to a position where centering adjustment work can be performed.