JPH0321797Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is an improvement of a material transfer device in a multi-stage heading forming machine having a plurality of heading stations, and in particular, a device that enables automatic replacement of the chuck mechanism in the device. Regarding.

(Prior art) Multi-stage heading molding, which is used to form bolts, nuts, and various other parts, involves arranging multiple dies on the front of a machine and moving them forward and backward relative to the machine. A plurality of punches are disposed on the ram so as to face each of the dies, respectively, and the material is sequentially supplied to a plurality of forging stations composed of the opposing dies and punches, thereby converting the material from rough to fine. This type of heading forming machine uses a cutter device installed on one side of the machine to cut the wire into a predetermined size. A material transfer device is provided that receives the cut material or the intermediate formed material formed at each heading station and sequentially transfers it to the downstream heading station.

This material transfer device is, for example,
As described in the publication, the machine consists of a slide plate that is placed on the front of the machine stand and reciprocates in the direction in which the dies are arranged side by side, and a pair of gripping claws that can be opened and closed and attached to the slide plate. It consists of a plurality of chuck mechanisms. and,
By opening and closing these chuck mechanisms in synchronization with the reciprocating movement of the slide plate, when the slide plate is located on the upstream side, the chuck mechanisms are cut by the cutter device or formed by the forging station on the upstream side. The material is gripped by each pair of gripping claws, and by opening the pair of gripping claws when the slide plate is positioned on the downstream side, the material is delivered to the heading station on the downstream side. .

In this case, the reciprocating movement of the slide plate is usually linked to the back and forth movement of the ram in order to synchronize it with the forging operation at each forging station. is configured to be linked to the ram's drive shaft via a cam mechanism or crank mechanism.

(Problem to be solved by the invention) By the way, in the material transfer device of this multi-stage heading forming machine, when changing the product shape, all chuck mechanisms are replaced as a setup change, and when each chuck mechanism is damaged, etc. Part of the chuck mechanism will be replaced.

In that case, when replacing the former, the plate itself will be replaced with each chuck mechanism attached to the slide plate, but since this slide plate is connected to the connecting rod as described above, , it is necessary to separate and connect this connection part. In addition, when connecting a new slide plate, the connection between the slide plate and the connecting rod should be made so that the chuck mechanism assembled on the plate is positioned correctly corresponding to each forging station at the end of the reciprocating stroke. Adjustment of the condition is required, and therefore, the work of replacing the chuck mechanism during this setup change becomes a very time-consuming and troublesome work.

In addition, the latter work of replacing only a part of the chuck mechanism is performed by removing each component of the chuck mechanism, such as a pair of gripping claws, from the slide plate and attaching a new component in its place. This attachment and detachment is performed for each individual component, which is extremely troublesome, and also requires a considerable amount of time because it is necessary to adjust the pair of gripping claws so that they can correctly grip the material. It is.

The present invention addresses the above-mentioned actual situation regarding the material transfer device of a multi-stage heading forming machine, and facilitates the work of replacing all or a part of the chuck mechanism that constitutes the transfer device. The goal is to enable automatic exchange of

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

First, the first invention according to the present application includes a plurality of dies arranged in parallel on the front side of a machine base, and a plurality of dies that move forward with respect to the machine base.
A plurality of punches are arranged in parallel on the front surface of a retractably provided ram and are opposed to each of the dies, and the material is sequentially supplied to each heading station constituted by each of the opposing dies and punches. In a material transfer device for a multi-stage forging machine that performs forging from coarse to fine, a slide plate is provided on the front surface of the machine base so as to be reciprocatable in the direction in which the dies are arranged side by side, and the slide plate is connected to the ram by moving the ram back and forth. a single chuck base removably attached to the slide plate; a single chuck base removably attached to the chuck base; a plurality of chuck mechanisms which are provided on the slide plate and reciprocate between the front positions of the axes of adjacent dies together with the slide plate, and which are interlocked with the main drive shaft to open and close the chuck mechanisms in synchronization with the back and forth movement of the ram. Accordingly, the chuck mechanism is characterized in that it is provided with chuck opening/closing means for causing the upstream heading station to receive the material and delivering it to the downstream heading station. Further, a material transfer device for a multi-stage heading molding machine according to a second invention of the present application includes a slide plate similar to the first invention, a plurality of chuck bases each removably attached to the slide plate, and these chuck bases. The invention is characterized by comprising a plurality of chuck mechanisms similar to the first invention described above, which are attached to each of the slide plates, reciprocate integrally with the slide plate via the base, and open and close in synchronization with the reciprocating movement. .

(Function) According to the above configuration, in the case of the first invention, by removing the chuck base from the slide plate, all of the plurality of chuck mechanisms are removed at once. Therefore, when changing the product shape, etc., there is no need to separate the slide plate and the connecting rod, etc. that reciprocates the slide plate in conjunction with the ram. No adjustment is required.

Further, according to the second invention, by removing the chuck base from the slide plate, one of the chuck mechanisms is removed as an assembly. Therefore, when replacing part or all of the chuck mechanisms, each chuck mechanism There is no need to individually remove component parts such as a pair of gripping claws constituting the slide plate from the slide plate, and there is no need for adjustment work when installing the chuck mechanism.

In both the first and second inventions, the replacement work of the chuck mechanism is simplified, so that this replacement work can be performed automatically using a robot or the like.

(Example) Examples of the present invention will be described below.

Figures 1 to 4 show an embodiment according to the first invention of the present application. First, the general structure of a multistage heading forming machine to which this embodiment is applied will be explained with reference to Figures 1 and 2. In the type heading forming machine 1, the front side of one side of the machine base 2 is a die mounting surface 2a, and the surface 2a
A plurality of (four in the illustrated example) dies 3...3 are arranged in parallel. Further, on the other side of the machine base 2, a ram 4 is provided so as to be movable back and forth in the direction approaching and away from the die mounting surface 2a, and a plurality of rams 4 are arranged facing each of the dies 3...3 of the ram 4. Punch 5...
5 are arranged in parallel, and a plurality of forging stations 6 ₁ to 6 ₄ are constituted by the opposing dies 3 and punches 5 . Furthermore, among these stations ₆₁ to ₆₄ , the upstream side (left side) of the first heading station ₆₁ located on the leftmost side in the drawing is a material cutting station ₆₀ , which is provided on the die mounting surface 2a. With the cutter device 7 (see Figure 2), the machine 2
The wire rod A supplied from the outside is cut into a predetermined size to form a molding material.

A main drive shaft 10 is installed behind the ram 4 on the machine base 2 and is rotatably driven by a motor 8 via belts 9...9.
The rotation of the ram 4 causes the ram 4 to move back and forth via the crank mechanism 11.

On the other hand, the die mounting surface 2a on the machine stand 2
A chuck block 12 is provided above the chuck block 12, and a chuck unit 30 as a material transfer device equipped with a plurality of chuck mechanisms 50...50 is disposed in front of the chuck block 12.

The chuck block 12 has rearwardly extending arm portions 12a, 12a supported by a support shaft 13, so that the front portion where the chuck unit 30 is provided can swing upward. Further, the chuck unit 30 is supported on the front surface of the chuck block 12 so as to be able to reciprocate from side to side (in the direction in which the dies 3 . . . 3 are arranged side by side). The connecting rod 14 connected to the chuck unit 30 reciprocates via the cam mechanism 15, rod 16, rack and pinion mechanism 17, and crank mechanism 18 due to the rotation of the main drive shaft 10. The chuck unit 30 is configured to reciprocate from side to side in front of the chuck block 12. Also,
The rotation of the main drive shaft 10 is caused by the first and second gear mechanisms 19, 20, the intermediate rotating shaft 21, and the third gear mechanism 2.
2 to the chuck opening/closing shaft 23 installed below the chuck block 12, and the rotation of the shaft 23 causes the chuck mechanisms 50...50 to be opened and closed via the plurality of cam mechanisms 24...24. ing.

Next, the structure of the check unit 30 will be explained with reference to FIGS. 3 and 4.

This chuck unit 30 has a slide plate 31 and a chuck base 33 removably attached to the front surface of the plate 31 with three bolts 32...32, and a plurality of chuck mechanisms 50...50 are attached to the chuck base 33. is provided. Here, as shown in FIG. 4, a positioning member 34 having a conical recess on the side of the slide plate 31 is provided at the joint between the slide block 31 and the chuck base 33 by the bolts 32, 32. A positioning member 35 having a conical convex portion is fixed to each side, and when these positioning members 34 and 35 fit together, the chuck base 33 can be attached to the slide plate 31 with high precision. It's summery.

A bifurcated portion 31a is provided at one end of the slide plate 31, and the connecting rod 14 is connected to the bifurcated portion 31a.
The upper and lower sides of the chuck block 12 are respectively engaged with guide members 36 and 37 fixed along the upper and lower edges of the front surface of the chuck block 12, respectively;
As a result, the slide plate 31 is connected to the chuck block 12 by the connecting rod 14.
It is designed to move back and forth from side to side on the front of the machine.

On the other hand, each of the chuck mechanisms 50 includes a pair of chuck arms 53 and 54 supported on the chuck base 33 via support shafts 51 and 52, respectively, so as to be rotatable and cross each other, and the tips of these arms 53 and 54. It has a pair of gripping claws 55, 56 attached to. In addition, the support shafts 51, 5
2 extends to the rear side of the plate 31 through an opening 31b provided over almost the entire length of the slide plate 31, and a pair of sector gears 57 and 58 that mesh with each other are fixed to the extension. The chuck arms 53, 54 or gripping claws 55, 56 are designed to open and close in synchronization with each other. Also, one chuck arm 54
is provided with an extension extending upward from the support shaft 52, and a return spring unit 59 is engaged with this extension. The return spring unit 59 includes an outer cylinder 61 supported by a mounting member 60 fixed to the upper side of the chuck base 33 and protruding diagonally upward, an inner cylinder 62 engaged with the chuck arm 54, and these cylinders. A return spring 63 is housed between 61 and 62, and the pair of chuck arms 53 and 54 or gripping claws 55 and 56 are normally biased in the closing direction by the spring 63.

Furthermore, as shown in FIG.
A lever member 65 having a roller 64 at its tip is fixed to the extension extending to the rear side of the slide plate 31, and a cam mechanism 24 is attached to the chuck opening/closing shaft 23 (see FIG. 1). 24
A plurality of cams 66 are fixed to each other.
The tip of the follower 68, which is swung by the rotation of the cam 66 and the biasing force of the spring 67, is brought into contact with the roller 64 at the tip of the lever member 65. As shown in FIG. 4, when the follower 68 is swung downward by the cam 66, the lever member 65 is pushed down, thereby moving the one support shaft 51 and the pair of sector gears 57, 5.
8, the other support shaft 52 connects to the chuck arm 5.
3, 54 or gripping claws 55, 56 are driven in the opening direction. Here, the lever member 65 is connected to the support shaft 51 and the chuck base 33.
Since the follower 68 reciprocates in the left-right direction integrally with the slide plate 31 via the support shaft 51, a pressing member 69 that is long in the left-right direction is fixed to the tip of the follower 68, and a pressing member 69 that is long in the left-right direction is fixed to the rear end of the support shaft 51. A roller 71 is provided which is received on a rail member 70 fixed to the chuck block 12 to receive the pressing force from the follower 68.

As shown in FIG. 3, the opening 31b provided in the slide plate 31 allows the support shafts 51, 52 of each chuck mechanism 50...50, the pair of sector gears 57, 58, the lever member 65, etc., to move forward. The chuck base 33 has a size that allows it to be pulled out, and the chuck base 33 has a screw shaft 2 which is screwed into the chuck exchange robot described later.
screw holes 33a, 33b are provided.

Next, to explain the operation of this embodiment, during normal heading work, the chuck unit 30 reciprocates from side to side in front of the chuck block 12 in conjunction with the back and forth movement of the ram 4, and the chuck opening/closing shaft 23
The pair of gripping claws 55, 56 of each chuck mechanism 50...50 opens and closes in synchronization with the reciprocating movement of the chuck unit 30. As a result, a material B obtained by cutting the wire rod A into a predetermined size by the cutter device 7, and an intermediate forming material B obtained by each stage of heading forming at each of the heading stations ₆₁ to ₆₃ except for the final station ₆₄ . ...B is transferred to a forging station on the downstream side by each chuck mechanism 50...50, and the next stage of forging is performed by each pair of dies 3...3 and punches 5...5, and the final forging station 6 Material B formed by ₄ ,
That is, the final product is discharged from the station ₆₄ to the product discharge section. In this way, a product having a predetermined shape is continuously pressed.

On the other hand, when changing the setup of this multi-stage heading molding machine 1 in order to manufacture products with different shapes,
In addition to replacing each of the dies 3...3 and punches 5...5, all the chuck mechanisms 50...50 in the chuck unit 30 are also replaced. According to the above configuration, this chuck replacement work is extremely easy as follows. easily done.

That is, in the chuck unit 30, the chuck base 33 is removably attached to the front surface of the slide plate 31 by three bolts 32... component parts, namely, a pair of support shafts 51 and 52, a pair of chuck arms 53 and 54 or gripping claws 55 and 56 attached to these support shafts 51 and 52, respectively, and a pair of support shafts 51 and 52 that interlock each other. Sector gears 57, 58 and one support shaft 5
Since the lever member 65 etc. fixed to the chuck mechanism 1 are supported, all the chuck mechanisms 50...50 can be removed by simply loosening the three bolts 32...32 and removing the chuck base 33 from the slide plate 31. Also, when installing a new chuck mechanism, if you prepare an assembly in which a plurality of chuck mechanisms 50...50 are assembled to the chuck base 33 in advance, this can be used in place of the chuck base 33 removed as described above. It is sufficient to attach them to the slide plate 31 using bolts 32 . . . 32 , and in this way, the entire chuck mechanism 50 .

Since the chuck replacement work is facilitated in this way, it becomes possible to automatically perform this replacement work by a robot. In that case, this replacement work is performed as follows.

In other words, as shown in FIG.
The two screw shafts 76, 76 provided in the chuck base 33 are inserted into the two screw holes 33a provided in the chuck base 33,
33a, and then by three bolt runners 77...77 also provided on the robot 75,
Remove the three bolts 32...32 that attach the chuck base 33 to the slide plate 31. As a result, all the chuck mechanisms 50...50 are removed together with the chuck base 33. In addition, this chuck base 33 and a plurality of chuck mechanisms 50...50 can be exchanged in advance at a separately provided exchange station.
The slide plate 31 is replaced with another chuck base 33 that has been assembled, and this new chuck base 33 and the three bolts 32...32
If it is attached to the slide plate 31, a plurality of new chuck mechanisms 50...50 will be attached to the slide plate 31 together with the chuck base 33. In addition,
Bolt runners 77...7 in the robot 75
7 are provided with sensors 78...78 that detect the fastening states of the bolts 32...32, respectively.

Next, an embodiment of the second invention of the present application will be described. Note that the same reference numerals are used for components other than the main parts that are the same as those in the above embodiment.

As shown in FIG. 6, the chuck unit 80 according to this embodiment has a connecting rod 14 connected to one end thereof, and the upper and lower sides thereof are fixed to the upper and lower edges of the front surface of the chuck block 12. A slide plate 81 is engaged with the guide members 36 and 37 and is supported so as to be reciprocatable from side to side, and a plurality of slide plates are removably attached to the front surface of the slide plate 81 by two bolts 82 and 82, respectively. (3 in the example) chuck bases 83...8
3, and a plurality of chuck mechanisms 90...90 provided on these chuck bases 83...83, respectively.

The chuck mechanism 90 is similar to the chuck mechanism 50 in the embodiment described above, and includes a pair of support shafts 91 and 92 supported by a chuck base 83, and a pair of chuck arms 93 attached to these support shafts 91 and 92, respectively. , 94 or gripping claw 9
5, 96, a pair of sector gears 97, 98 which are fixed to the support shafts 91, 92, respectively, on the rear side of the chuck base 83 and meshed with each other; or a pair of gripping claws 9
5, 96 in the closing direction, and a lever member 100 fixed to the rearward extension of one of the support shafts 91.

The slide plate 81 is reciprocated from side to side on the front surface of the chuck block 12 by the connecting rod 14 in conjunction with the back and forth movement of the ram, and in synchronization with this reciprocation, each pair of chuck mechanisms 90...90 chuck arm 9
By opening and closing the holding claws 3, 94 and 95, 96, the material B is sequentially transferred from the cutter device 7 or the forging stations 6...6 on the upstream side to the forging stations 6...6 on the downstream side. There is. Here, also in this embodiment, each chuck base 83 has screw holes 83a, 83a into which screw shafts provided in the chuck exchange robot are screwed.
There are two each.

According to the above configuration, when replacing part or all of the chuck mechanisms 90...90, the two bolts 8
2 and 82 to remove the chuck base 83 on which the chuck mechanism 90 to be replaced is installed from the slide plate 81, the chuck mechanism 90 can be removed from the slide plate 81, and a new chuck base 83 with the chuck mechanism 90 installed in advance can be removed. Attach the chuck base 83 to the above two bolts 8.
2, 82 to the slide plate 81, the support shaft 91, which constitutes the chuck mechanism 90, can be attached without removing the slide plate 81.
The chuck mechanism 90 can be replaced without individually removing each component such as the chuck arm 92 and the chuck arms 93, 94.

Also in this embodiment, the bolt 8
Each chuck mechanism 90 can be replaced automatically by using a robot that has a bolt runner for attaching and detaching the chucks 2 and 82 and a screw shaft that is screwed into the screw holes 83a and 83a provided in the chuck base 83. becomes.

(Effects of the invention) As described above, according to the material transfer device for a multi-stage heading forming machine according to the present invention, when all the chuck mechanisms in the device are replaced during setup changes, or when a part of the chuck mechanism is damaged, etc. When replacing the chuck mechanism, there is no need to separate the slide plate and the connecting rod that reciprocates in conjunction with the ram, and there is no need for adjustment work when connecting, and each part that makes up the chuck mechanism can be replaced. The chuck mechanism can be removed in whole or in part by simply removing and attaching the chuck base detachably attached to the slide plate without requiring the troublesome work of removing the chuck mechanisms individually. In addition, as the chuck mechanism replacement work becomes easier in this way, it becomes possible to automatically perform this work using a robot, which significantly shortens the time required for this chuck replacement work. Productivity will improve.

[Brief explanation of the drawing]

Figures 1 to 5 show examples of the first invention.
Figures 1 and 2 are a plan view and a longitudinal sectional front view of a multi-stage heading forming machine to which this embodiment is applied, Figure 3 is an enlarged front view of the main parts of this embodiment, and Figure 4 is a line drawn from Figure 3. FIG. 5 is a schematic plan view taken along the line of FIG. 3. Moreover, FIG. 6 is a front view of main parts showing an embodiment according to the second invention. 1...Multi-stage heading molding machine, 2...Machine stand, 3...
Die, 4...Ram, 5...Punch, 10...Main drive shaft, 14-18...Slide plate drive means, 19-24...Chuck opening/closing means, 30,8
0...Material transfer device (chuck unit), 31,
81...Slide plate, 33, 83...Chuck base, 50, 90...Chuck mechanism.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of dies arranged in parallel on the front of a machine base, and each of the above-mentioned dies arranged in parallel on the front of a ram that is provided so as to be able to move forward and backward with respect to the machine base. A material transfer device in a multi-stage heading forming machine, which has a plurality of punches facing each other, and sequentially supplies the material to each heading station composed of opposing dies and punches, and performs heading forming from coarse to fine. It's hot,
A slide plate is provided on the front surface of the machine base so as to be able to reciprocate in the direction in which the dies are arranged side by side. a slide plate driving means that is driven to reciprocate; a single chuck base that is removably attached to the slide plate; A plurality of chuck mechanisms move, and the chuck mechanisms are linked to the main drive shaft and are opened and closed in synchronization with the back and forth movement of the ram, thereby allowing the chuck mechanisms to receive the material at the forging station on the upstream side and transfer the material to the forging station downstream. A material transfer device for a multi-stage heading forming machine, characterized in that it is provided with a chuck opening/closing means for transferring the material to a side heading station. (2) A plurality of dies arranged in parallel on the front side of the machine base, and a plurality of punches arranged in parallel on the front face of a ram that is provided so as to be able to move forward and backward with respect to the machine base, and facing each of the above-mentioned dies. A material transfer device in a multi-stage heading forming machine which sequentially supplies material to each heading station composed of opposing dies and punches and forms the material from coarse to fine heading,
A slide plate is provided on the front surface of the machine base so as to be able to reciprocate in the direction in which the dies are arranged side by side, and the slide plate is interlocked with a main drive shaft that moves the ram back and forth to maintain a predetermined interval in the direction in which the dies are arranged side by side. a plurality of chuck bases that are removably attached to the slide plate; and a plurality of chuck bases that are provided on each of these chuck bases to drive the axis of the adjacent die along with the slide plate. A plurality of chuck mechanisms reciprocate between the chuck mechanisms, and the chuck mechanisms are interlocked with the main drive shaft and opened and closed in synchronization with the back and forth movement of the ram. A material transfer device for a multi-stage heading forming machine, characterized in that it is provided with a chuck opening/closing means for receiving the material and transferring it to a downstream heading station.