JPH0733429U - Multi-stage press forming machine - Google Patents

Abstract

(57) [Summary] [Purpose] Change the optional forging station of the multi-stage forging machine for forming materials from coarse to precise to another processing station to remove burrs and fracture scratches generated on the blank by forging. It is carried out continuously with the processing and is completed by the time the blank is discharged from the molding machine. [Structure] A unit consisting of a case 22 and a motor support 28 is mounted in a lower die mounting hole of the final die 3C, and a motor 2 that slides in the unit in front of and behind the machine base 1
6, a rotary shaft 25 and a support shaft 29 are internally urged rearward by a spring 27. The support shaft 29
When pushed forward by the driving of the motor pushing hammer 13Z having a phase different from that of the KO hammer 13 that drives the knockout pin 9, the cutter 23 provided at the front end of the rotary shaft 25 comes into contact with the bottom surface of the blank X. The blank X to remove burrs and fracture scratches.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-stage forging machine for forming raw material from a plurality of forging stations roughly to finely, and more specifically, by changing a given forging station to a work station other than forging easily, The present invention relates to a multi-stage forging machine configured to be capable of continuously removing burrs and ruptures and the like that occur in a blank and other forging processes.

[0002]

[Prior art]

 A multi-stage press forming machine for forming bolts, nuts, and various other parts is a process in which the material is roughly and finely stepped in multiple press stations with dies and punches facing each other. Generally, in this type of molding machine, each of a plurality of dies arranged in parallel on the machine base is provided with a concave portion called a cavity, and the material or blank is pressed by a punch by a ram forward force. As a result, the blank supplied to each forging station is forged into a predetermined shape. Then, the forged blank is gripped by the blank transfer chuck provided on the front surface of the machine base and transferred to the adjacent lower forging station, where the next forging process is performed.

At this time, since the chuck is provided on the front surface of the machine base, in order for the chuck to grip the blank left after being pressed in the cavity, the blank is discharged from the die to the position of the chuck. A blank ejector is typically provided for this purpose. Such a blank ejector has, for example, a member called a knockout pin slidably installed in a hole provided so as to penetrate a die in a direction of advancing and retracting with respect to a ram behind a pressing surface of a cavity. A separate drive unit pushes the blank in synchronization with the forward / backward movement of the punch to push out the blank left in the cavity to the front of the machine base and discharge it. Therefore, when the punch moves toward the die and presses the blank, the drive device retracts the knockout pin to a predetermined position in the hole so that the blank is pressed into a predetermined shape, while the punch moves to the die. When the chuck retreats from the position and the chuck grips the blank, the knockout pin is pushed forward to push out the forged blank from the rear of the cavity toward the front of the machine base and discharge it.

By the way, in this case, the inner diameter of the hole is set to be larger than the outer diameter of the knockout pin so that the knockout pin can be driven forward and backward in the hole without any trouble. Since there is a direct opening in the cavity, a gap will inevitably occur on the cavity surface at the boundary between the knockout pin and the edge of the hole. As a result, part of the material enters the gap due to the pressing force of the punch during the forging, so-called burrs are formed on the surface of the forged blank, and in order to remove it, the secondary after the forging process. There is an inconvenience that deburring work must be performed separately as processing.

Further, so-called breakage scratches remaining on the surface of the pressed blank have also been conventionally removed by cutting or grinding work as a separate secondary process, which is also a great obstacle to improvement of production efficiency. There is.

In order to solve such a problem, as disclosed in Japanese Patent Publication No. Sho 60-33614, the pressed material is drawn into a mold case of a predetermined stage and gripped, and the material is rotated. A chuck mechanism that can be used is installed on the machine base, and instead of a punch, a pressing body that presses the material against the chuck mechanism is installed on the ram.The chuck mechanism and the pressing body rotate the material while rotating it. There is a material to remove burrs and cutting scratches by protruding a cutting tool that slides on the front of the machine base.

Further, as disclosed in Japanese Patent Publication No. Sho 60-33615, a rotary tool is provided in a die mounting hole on the machine base side, and a material holding cylinder and a material are provided on the ram side instead of the punch. A pressing cylinder for pressing against the rotary tool is provided, and the material holding cylinder and the pressing cylinder are driven in synchronization with the operation of the ram, so that the material surface is cut or ground during the forging process. There are some that are designed to do.

[0008]

[Problems to be solved by the device]

 However, in the former case, in order to drive the chuck mechanism and the cutting tool in synchronization with the advance and retreat of the ram, it is necessary to separately provide a drive device such as a cam shaft on the machine base for each of them, and The molding machine itself must be significantly modified, such as a new design.

Also in the latter case, the structure of the ram is complicated by providing a device for holding the material according to the movement of the ram and pressing the material against the rotating tool, while the die with the rotating tool attached thereto is complicated. Since the material is pressed against the rotating tool in the mounting hole and turning is performed, the shavings remain scattered in the die mounting hole, and as a result, the shavings are caught in the rotating part such as the rotating shaft and the rotation of the tool is hindered. There is a risk that shavings will be caught between the tool surface and the material, making precise processing impossible.

Therefore, according to the present invention, the existing apparatus can be effectively used without a major modification of the molding machine, and the station at a predetermined stage can be easily changed to a processing station other than the forging processing, and then the forging processing can be performed. The challenge was to provide a multi-stage forging machine that can smoothly perform deburring work and fracture damage removal work.As a result, new equipment costs can be curbed and separately performed as conventional secondary processing. The purpose is to eliminate the work that had been done and improve the production efficiency.

[0011]

[Means for Solving the Problems]

 That is, the invention according to claim 1 of the present application (hereinafter referred to as the first invention) includes a die attached to a machine base, a punch attached to a ram that moves forward and backward with respect to the machine base, and these dies. It has a plurality of forging stations equipped with a punch and a knockout member for ejecting the blank formed by the die from the die, and a knockout drive mechanism for driving the knockout member in synchronism with the forward and backward movement of the punch, and a machine stand. In a multi-stage press forming machine equipped with a plurality of chucks for transferring blanks discharged from the upper die to the lower die on the front surface, in a predetermined die attachment hole of at least the second and subsequent stages in the machine base. , The motor with the deburring member attached to the rotary shaft is slidably supported in the forward and backward directions with respect to the ram, and the chuck is fixed to the predetermined position. Motor moving means said deburring member for pushing the motor to a position in contact with those of the blank when transferring the blanks to Lee mounting position, characterized in that it is provided in the knockout drive mechanism.

The invention according to claim 2 of the present application (hereinafter referred to as the second invention) is the contact part for contacting and supporting the blank with a chuck for transferring the blank to a predetermined die attachment position in the first invention. Is provided.

Further, a device according to claim 3 of the present application (hereinafter, referred to as a third device) includes a die attached to a machine base and a punch attached to a ram moving forward and backward with respect to the machine base. In addition to having multiple forging stations, a multi-stage forging machine equipped with multiple chucks for transferring blanks from the upper die to the lower die on the front of the machine base has a rotary shaft at the bottom of the final forging station. A motor having a turning member attached to the chuck is slidably supported in a direction perpendicular to the moving direction of the chuck, and an elastic body for urging the motor in the front direction of the machine base is provided to provide the chuck. While the blank is being transferred to the lower stage of the final forging station, the turning surface of the turning member comes into contact with the blank and a concave portion with a curved surface is formed in the center of the turning member. Is provided, and when the chuck transfers the blank to the lower stage of the final forging station, the motor is biased by the elastic body to a position where the concave portion contacts the blank.

The invention according to claim 4 of the present application (hereinafter, referred to as the fourth invention) is the method according to the third idea, wherein the blank is brought into contact with and supported by a chuck for transferring the blank to the lower stage of the final forging station. It is characterized in that a contact member is provided and a guide member for supporting the chuck against the biasing force of the elastic body is provided.

[0015]

[Action]

 In the first invention, the deburring station is provided by slidably supporting a motor having a deburring member mounted on a rotary shaft in a die mounting hole in which a die block is mounted in an ordinary forging station. Therefore, the existing machine base can be used as it is without modifying the machine base to change the station. However, not only the last stage, but any desired stage can be selected and the forging station can be changed to the deburring station, so it is possible to install a deburring station in the middle of the forging process, and forge with burrs occurring. It is possible to prevent the members of the molding machine and the blank from being damaged when the processing is continued.

Further, a motor advance / retreat means is attached to the knockout drive mechanism already provided for the purpose of driving the knockout member so as to eject the forged blank from the die, whereby the motor is moved to the advance / retreat operation of the punch. Since the pushers move in synchronism, the deburring member can be pushed out toward the front of the machine base by using the existing device without newly installing a separate drive device such as a cam shaft. Moreover, since the motor advancing / retreating means can directly use the member for pushing the knockout member in the other pressing station, it can contribute to the reduction of the required cost.

Further, when the chuck provided on the front surface of the machine base transfers the blank to the deburring station, the motor is pushed forward and the deburring member comes into contact with the blank, and the deburring member is generated up to the preceding stage at the contact position. Since burrs are removed, the burrs are removed from the front of the machine base outside the die mounting holes.As a result, shavings do not remain in the mounting holes, and the motor rotation does not occur. Inconveniences such as obstruction and obstacles to smooth deburring work are eliminated.

On the other hand, on the ram side, it suffices to remove the punch corresponding to the burr removal station, and there is no need to newly provide a member in place of the punch, so that the molding machine can be simplified and the required cost can be reduced. .

According to the second aspect of the invention, since the chuck for transferring the blank to the deburring station is provided with the abutting portion for abutting and supporting the blank, the blank is deburred during the deburring operation. The burr can be reliably removed without being pushed out of the chuck and displaced from the chuck. Moreover, since the chuck only has to normally hold the blank, it is not necessary to provide a new chuck mechanism such as a holding device for specially fixing the blank.

According to the third aspect of the invention, the motor having the turning member attached to the rotary shaft is slidably supported in the lower stage of the final press forming station, and is biased toward the front of the machine base by the elastic body. Therefore, without using any driving mechanism or power transmission means, the turning member attached to the motor projects from the front face of the machine base and comes into contact with the transferred blank. As a result, the turning operation is performed outside the machine base, and the inconvenience of the rotation of the motor due to the generation of shavings is eliminated. In this case, since the existing die attachment hole can be used as the lower stage of the final forging station where the motor is provided, the existing molding machine can be used as it is without modification.

Then, while the chuck is transferring the blank to the motor mounting position, the turning surface of the turning member makes contact with the blank so as to press the blank due to the urging force of the elastic body. It is possible to remove burrs, fracture scratches, etc. that have occurred on the blank while the machine is moving laterally in front of the machine base.

Further, when the chuck has moved to the blank transfer completion position, since the concave portion having the curved surface is provided in the central portion of the turning member, the motor and the turning member are the distance of the depression of the concave portion. Is further advanced by the urging force of the elastic body, and the curved surface of the recess comes into contact with the blank. As a result, it is possible to remove burrs during transfer and new burrs generated in the lateral direction due to turning of fracture scratches. Therefore, without using any other driving device, the turning member can advance and retreat while contacting the blank by itself only by the urging force of the elastic body, and the deburring work can be performed in two steps. Turning will be performed.

On the other hand, the chuck only needs to perform a normal transfer operation on the front surface of the machine base, and it is not necessary to add a new device.

Further, in the fourth invention, since the chuck for transferring the blank to the motor mounting position is provided with the contact portion for contacting and supporting the blank, the turning member presses the blank during the transfer or at the completion of the transfer. However, the blank will not fall out of the chuck or be displaced. Further, since the guide member for supporting the chuck against the biasing force of the elastic body is provided, the chuck itself for holding the blank to be turned is prevented from being displaced and the guide member is Depending on the installation position, the turning depth can be changed.

[0025]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial plan view of a main part of a multi-stage forging machine on the machine base side, showing three dies 3A and 3B in a die mounting hole of a die block 2 installed on the machine base 1. 3C are continuously arranged at regular intervals, and three punches 4A, 4B, which are the same number as the dies, are formed on the front surface of a ram (not shown) which moves forward and backward from the left side of the drawing with respect to the machine base 1. The 4 C are arranged at regular intervals to form a forging station. Therefore, in the case of the forging machine according to this embodiment, three forging stations are provided, and the die 3A, 3B corresponding to the three punches 4A, 4B, 4C by the forward and backward movement of the ram, respectively. A blank is forged between and 3C.

A cutting station 5 is provided above the uppermost die 3A of the machine base 1 to cut the wire Y into a predetermined length into a blank X and supply the blank X to the first forging station. The wire Y supplied to the cutting station 5 from the rear of the machine base 1 is installed in front of the machine base 1, and after coming into contact with a cradle 6 that determines the length of the wire Y to be cut depending on the installation position, A blank X is supplied to the top forging station by being cut as shown by the broken line in the figure.

On the other hand, on the front surface of the machine base 1, four blank transfer chucks 7A, 7B, 7C and 7Z for reciprocating between adjacent forging stations to transfer the blanks from the upper die to the lower die. Is provided. These four chucks 7A, 7B, 7C and 7Z are reciprocated by a method well known in the art by a distance equal to the distance between adjacent dies in synchronization with the advancing / retreating operation of the ram with respect to the machine base 1. Is configured as follows. Therefore, in the case of the press forming machine shown in FIG. 1, the chuck 7A is the unformed material supplied at the cutting station 5 to the die 3A, the chuck 7B is the blank discharged from the die 3A to the die 3B, and the chuck 7C is the chuck 7C. The blank discharged from the die 3B is transferred to the die 3C, and the final chuck 7Z transfers the blank discharged from the die 3C to a deburring station described later.

Further, each forging station is provided with a knockout member 8 for discharging the forged blank from the die. This knockout member 8 has a large-diameter hole portion provided on the back surface of the die and a small-diameter hole portion provided on the die so as to connect the hole portion and the cavity on the front surface of the die. A knockout pin 9 having a T-shaped cross section having a 9a is slidably installed in the ram forward and backward direction, and in the large-diameter hole portion, a flange portion 9a of the knockout pin 9 and an inner wall of the large-diameter hole portion are formed. A coil spring 10 is installed between the two, and the opening of the large-diameter hole is closed by a KO pin support 11 that supports the knockout pin 9 against the urging force of the spring 10. Has been done.

Therefore, the pin portion of the knockout pin 9 moves back and forth in the small-diameter hole portion, and the collar portion 9a moves back and forth in the large-diameter hole portion, respectively. When no external force is applied, the urging force of the spring 10 is applied. It has retreated to the end. While the ram advances toward the machine base 1 when the knockout pin 9 is retracted, it presses the blank X in the cavity to forge it. However, since the small-diameter hole is directly opened in the cavity. The front end portion of the knockout pin 9 determines a part of the forging shape of the blank X. In this embodiment, as shown in FIG. 1, since the front end of the knockout pin 9 coincides with the cavity surface, the bottom surface of the blank X is formed flat.

At this time, a part of the raw material enters into the gap formed at the boundary between the hole opened on the cavity surface and the knockout pin 9 that slides back and forth in the hole by the pressing force of the punch. As shown in the enlarged view of FIG. 3, burrs X ′ are generated on the bottom surface of the blank X which is flatly formed.

On the other hand, a hole is formed in the center of the KO pin support 11 so as to pass through the support 11, and the knockout pin 9 is placed in this rear part against the biasing force of the spring 10. The KO push rod 12 that pushes out from the front of the machine base is slidably supported. As will be described below, the KO push rod 12 has a KO hammer 13 and drives the KO hammer 13 left and right in synchronization with the advance and retreat movement of the ram. The KO pin is driven by a known knockout drive mechanism. It slides in the hole of the support 11.

At this time, the KO hammer 13 prevents the knockout pin 9 and the KO pushing rod 12 from retracting by the urging force of the spring 10 when the ram moves toward the machine base 1 to forge a blank. A blank in which the ram retreats from the machine base 1 and the chucks 7A, 7B, 7C, and 7Z are pressed while retracting to the rear of the KO push rod 12 so as not to hinder it (position of the virtual line in FIG. 3). When gripping, the knockout pin 9 is moved forward against the urging force of the spring 10 by driving in the front direction of the machine base (position indicated by the solid line in FIG. 3) and pushing the KO pushing rod 12 forward. , The blank X left on the dies 3A, 3B and 3C is discharged from each die. As shown in FIG. 3, the knockout drive mechanism 14 has a cam 17 attached to the other end of an arm 16 which is eccentrically connected to a shaft 15 which makes one rotation by a forward / backward movement of a ram. The rotation of the cam 17 causes the cam 17 to oscillate about the cam rotation shaft 18 so that the hammer body 19 including the KO hammer 13 makes a pendulum motion about the rotation shaft 20. By changing the phase of the cam 17, the operation timing of the KO hammer 13 with respect to the KO push rod 12 can be set.

A deburring station 21 which is a characteristic part of the present invention is provided below the lowermost die 3C shown in FIG. The deburring station 21 uses the die attachment holes in the lower stage of the final forging station (in this example, the forging station having the die 3C), and when installed on the machine base 1, the dies are arranged in parallel. A case 22 provided with a through hole so as to be perpendicular to the direction is mounted in the die mounting hole. Then, the motor 26 that fits the head 24 to which the cutter 23 that removes the burrs X ′ by turning the bottom surface of the pressed blank is attached to the rotary shaft 25 is provided in the hole in the case 22 described above. Like the knockout pin 9, it is slidably supported in the front-rear direction.

A coil spring 27 is provided in the hole in the case 22 so as to bias the motor body 26 to the rear of the machine base 1, and resists the biasing force of the coil spring 27. A motor support 28 that supports the motor 26 is attached to the rear surface of the case 22. Further, a support shaft 29 is integrally attached to the motor body 26 on the opposite surface to the attachment surface of the rotary shaft 25, and penetrates a hole provided in the central portion of the motor support 28.

Therefore, the members mounted on the motor main body 26 from the cutter 23 at the foremost end to the support shaft 29 at the rearmost end move back and forth as a unit to move within the unit made up of the case 22 and the motor support 28. Slide. With the operation of the knockout drive mechanism 14 described above, the motor pushing hammer 13Z attached to the drive mechanism 14 resists the biasing force of the coil spring 27 and moves the support shaft 29 to the machine base 1. By pushing it out in the front direction, the cutter 23 is projected from the front surface of the machine base.

Here, the cutter 23 projects from the front surface of the machine base 1 and comes into contact with the bottom surface of the blank X transferred by the final chuck 7Z when the motor pushing hammer 13Z is driven to the frontmost. , The length of each member mounted on the motor 26 is set, and the hammer 13Z retracts backward, and the motor body 26 is retracted to a position where the motor body 26 contacts the motor support 28 by the biasing force of the coil spring 27. When this happens, the length of each mounting member of the motor 26 is set so that the cutter 23 does not project from the front surface of the machine base 1.

Then, as shown in FIG. 1, when the blank X is being pressed by the three pressing stations, it is generated on the bottom surface of the blank X transferred to the deburring station 21 by the final chuck 7Z. The motor pushing hammer 13Z is driven forward so that the cutter 23 removes the burr X ', and the cutter 23 is moved forward. As shown in FIG. 3, when the KO hammer 13 of another forging station is retracted (indicated by a virtual line in the figure), the hammer for pushing motor 13Z is advanced (indicated by a solid line in the figure). ), When the KO hammer 13 moves forward (indicated by a solid line in the figure), the motor pushing hammer 13Z moves backward (indicated by a solid line in the figure) so that the cam 17Z of the motor pushing hammer 13Z moves. This is easily done by offsetting the phase with that of the cam 17 relative to the other KO hammer 13.

By doing so, as shown in FIG. 2, when the knockout pin 9 ejects the blank X from the die and the ejected blank X is transferred by the chuck, the cutter 23 retracts and the machine base 1 is moved. It does not protrude from the front of the machine (the position shown by the solid line in the figure) and does not hinder the movement of the chuck, while the ram is moving toward the machine base and performing the forging process, the cutter 23 Moves forward and comes into contact with the blank X carried by the final chuck 7Z on the front surface of the machine base 1 (position indicated by imaginary line in the figure), and removes burrs X'generated on the bottom surface thereof. . Therefore, since this deburring work is necessarily performed on the front surface outside the machine base 1, the removed shavings are stored in the case 22 and enter the hole of the case 22 to rotate the rotating shaft 25 of the motor. There is no risk of causing obstruction or roughening the cutting surface of the cutter 23.

At this time, the blank X is attached to the claws of the final chuck 7Z so that the blank X does not become displaced when the blank X is pressed to the ram side by the forward movement of the cutter 23 and does not fall out from the chuck. Since the contact portion 7 Z ′ that supports the pressing direction of 23 is provided, reliable removal of the burr X ′ is ensured.

When the ram retreats from the machine base 1 again, the final chuck 7Z is opened to release the blank X from which the burs have been removed and return to the final forging station in the upper stage, and the released blank X is released. The product is discharged from the molding machine, and a series of forging forming processes and deburring work, which was separately performed in the conventional secondary processing, are successively completed.

In this embodiment, the deburring station is provided in the lower stage of the final forging station, so that deburring is performed on the blank for which all forging has been completed immediately before the blank is discharged from the molding machine. Although the case has been described, as described above, the unit including the case 22 having the motor main body 26 and the motor support 28 can be changed to a deburring station simply by exchanging the die for the forging station. For example, it is possible to change the forging station having the die 3B in FIG. 1 to a deburring station. In this case, after removing the burrs generated in the upper die 3A, the blanks are transferred to the lower die 3C for the next forging process. It is possible to prevent damage to the molding machine member or the blank itself when the press working is continued.

In any case, in the ram, it is only necessary to remove the punch corresponding to the deburring station, and the deburring station is provided outside the forging station, for example, so as not to impede the forward and backward movement of the ram. When punching, there is no need to remove the punch.

Next, another embodiment of the present application will be described.

FIG. 4 is a plan partial cross-sectional view of the main part of the multi-stage press forming machine according to this embodiment on the machine base side, and three die-mounting holes are provided in the die block 2 installed on the machine base 1. The dies 3A, 3B and 3C are continuously arranged at regular intervals, and the mechanism of the knockout member for discharging the pressed blank X from the die is the same as that of the above-mentioned embodiment.

In this molding machine, when the wire rod Y is cut in the cutting station 5, the feeder 5 ′ slides the cut material X and slides on the front surface of the machine base 1 and transfers it to the uppermost forging station. . Therefore, three blank transfer chucks are provided, the chuck 7B is the blank discharged from the die 3A to the die 3B, the chuck 7C is the blank discharged from the die 3B to the die 3C, and the final chuck 7Z is the die 3C. The blanks discharged from each will be transferred to the turning stations described below.

A turning station 30 different from the forging station is provided in the die attachment hole to which the blank X is transferred by the final chuck 7Z.

This turning station 30 has been modified with the aid of a conventional final forging station. When it is attached to the machine base 1, a hole is provided so as to be perpendicular to the parallel direction of the dies. The case 31 is mounted in the die mounting hole, and the motor 32 is installed in the hole of the case 31. The motor 32 has a rotary shaft 33 and a support shaft 34 on opposite surfaces, and the rotary shaft 33 penetrates through the hole so that the front end of the rotary shaft 33 reaches the front face of the machine base 1 and the front end thereof. A head 36 to which a turning tool 35 having a diameter substantially the same as that of the die attachment hole is attached is fitted in the head. For the reason described later, the turning tool 35 is provided with a concave portion having a curved surface at the center of the turning surface and a chamfer on the turning surface edge (see FIGS. 4 and 5).

On the other hand, on the rear surface of the case 31, there is mounted a motor support 37 having a hole through which the support shaft 34 penetrates and slides in the center, and the motor support 37 and the motor A coil spring 38 is installed between the main body 32 and the main body 32 so as to bias the motor 32 toward the front surface of the machine base 1.

Therefore, from the turning tool 35 at the front end to the support shaft 34 at the rear end, the respective members mounted on the motor main body 32 move back and forth as a unit, and the case 31 and the motor mounted in the die mounting hole It slides in the turning unit including the support 37. The motor 32 is always in contact with the inner wall of the front surface of the hole of the case 31 by the urging force of the coil spring 38 provided behind the motor body 32.

At this time, the length of each member attached to the motor 32 and the motor 32 are in contact with each other such that the turning surface of the turning tool 35 attached to the foremost end projects from the front surface of the machine base 1. Although the position of the inner wall of the front surface is set, more precisely, as shown in FIG. 5, when the final chuck 7Z completes the transfer of the blank X to the turning station 30, the motor 32 is most operated. It is set so that the concave portion provided in the central portion of the turning tool 35 moves forward and comes into contact with the bottom surface of the blank X (shown by an imaginary line in the drawing). Then, the concave portion is provided in a curved shape with a size corresponding to the bottom surface of the transferred blank X.

By doing so, when no force acts on the motor 32 from the outside, the motor main body 32 always abuts on the inner wall of the front surface of the hole of the case 31, so that the turning surface of the turning tool 35 is in the middle of transfer. The blank X projects slightly forward from the bottom of the blank X by the amount of the depression of the recess (indicated by an imaginary line in FIG. 5), and the blank X is being transferred to the turning station 30 by the final chuck 7Z. During the transfer, the blank X being transferred is transferred while pressing the turning tool 35 against the biasing force of the coil spring 38 (indicated by the solid line in FIG. 5).

Therefore, burrs X ′ generated in the forging station, breakage scratches on the blank surface, and the like can be performed during the transfer of the blank, and the removed shavings are discarded outside the machine base 1.

At this time, as shown in the drawing, when the turning surface edge of the turning tool 35 is chamfered, when the blank X comes into contact with the protruding turning tool 35, the turning tool 35 is smoothly moved. It is preferable because you can ride it while pressing it.

Then, when the final chuck 7 Z finishes transferring the blank X to the turning station 30 and reaches the position of the recessed portion provided in the central portion of the turning tool 35, the blank X is urged by the coil spring 38. The motor 32 moves forward and the concave portion contacts the bottom surface of the blank X. As a result, it is possible to further remove the burr X "(see FIG. 5) extending laterally from the bottom surface of the blank, which is expected to be newly generated by the turning process during the above-mentioned transfer, such as a knockout drive mechanism. It is possible to perform the turning operation in two stages by sliding the motor 32 back and forth in the turning unit only by the urging force of the coil spring 38 without using the device described above.

Further, in order to ensure that the turning tool 35 is sufficiently pressed against the claws of the final chuck 7Z, the blank X is not displaced during the transfer or slipped out of the chuck, and the coil spring 38 is An abutting portion 7Z ′ that supports the blank X is provided in a direction facing the urging force of the blank.

Further, in front of the turning station 30 of the machine base 1, a guide member 39 is provided along the transfer path of the final chuck 7Z. Since the final chuck 7Z moves between the guide member 39 and the machine base 1, when the blank X is transferred to the turning station 30, the urging force of the coil spring 38 transmitted through the held blank X is resisted. And is supported from behind by the guide member 39. As a result, the possibility that the final chuck 7Z itself is displaced due to the biasing force of the coil spring 38 and the blank X is not sufficiently turned is eliminated. Furthermore, by moving the installation position of the guide member 39 away from or closer to the machine base 1, it is possible to adjust the degree and depth of turning of the blank X.

[0058]

[Effect of device]

 As is clear from the above description, according to the first aspect of the present invention, the conventional machine base can be used as it is without modifying the machine base to change the existing forging station to another work station. . Moreover, not only the final stage, but any desired stage can be selected and the forging station can be changed to a deburring station, so a deburring station can be provided during the forging process, and the forging process can be performed with burrs occurring. It is possible to prevent the members and blanks of the molding machine from being damaged when continued.

Further, since the deburring work can be performed outside the machine base by using the existing device without separately installing a new drive device such as a cam shaft, it contributes to the reduction of the required equipment cost. In addition, shavings and the like do not remain in the deburring station, and the inconveniences such as hindering the rotation of the motor and hindering smooth deburring work are eliminated.

On the other hand, on the ram side, it suffices to remove the punch corresponding to the deburring station, and it is not necessary to newly provide a member in place of the punch, so that the molding machine can be simplified and the required cost can be reduced. .

According to the second aspect, the blank does not fall out of the chuck or shift in position during the burr removal work, so that the reliability of the work can be ensured. Further, it is not necessary to provide a new chuck mechanism such as a holding device for fixing the blank particularly.

Further, according to the third invention, since the turning operation can be performed outside the machine base without using any drive mechanism or power transmission means, shavings are stored in the turning station. The inconvenience is eliminated. Furthermore, since the turning station can utilize the existing die mounting holes, it can be used as it is without modifying the conventional molding machine.

Then, while the chuck is transferring the blank, while the blank is laterally moving on the front surface of the machine base, it is possible to remove burrs, breakage scratches and the like that have occurred on the blank, and the chuck is When moving to the transfer completion position, it is possible to remove burrs in the middle of transfer and new burrs generated in the lateral direction by removing the rupture scratches, and it is possible to remove the burrs in two steps without using any other drive device. Since deburring work will be performed, a highly complete turning process will be carried out simply after the blanking process, before the blank is discharged.

On the other hand, the chuck only needs to perform a normal transfer operation on the front surface of the machine base, and does not need to add a new device.

Further, according to the fourth aspect, the blank does not fall out of the chuck or shift in position during and after the transfer. In addition, since a guide member that supports the transfer chuck is provided, the chuck itself that holds the blank to be turned can be prevented from being displaced, and the turning position depends on the installation position of the guide member. The processing depth can be changed.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional plan view of a main part of a multi-stage press forming machine according to an embodiment of the present invention.

FIG. 2 is an enlarged plan partial cross-sectional view showing a main part of the embodiment.

FIG. 3 is a partial side cross-sectional view of the rear part of the machine base of the multi-stage press forming machine according to the embodiment.

FIG. 4 is a partial cross-sectional plan view of the main part of the multi-stage press forming machine according to another embodiment of the present invention on the machine base side.

FIG. 5 is an enlarged plan partial cross-sectional view showing a main part of the embodiment.

[Explanation of symbols]

 1 Forging machine 7Z Final chuck for transferring blanks 13 KO hammer 13Z Motor pushing hammer 14 Knockout drive mechanism 17,17Z cam 21 Deburring station 23 Cutter 25,33 Rotating shaft 26,32 Motor 30 Turning station 35 Turning tool

Claims (4)

[Scope of utility model registration request] 1. A die attached to a machine base, a punch attached to a ram moving forward and backward with respect to the machine base, and a knockout member for ejecting a blank formed by the die and the punch from the die. A plurality of forging stations, a knockout driving mechanism for driving the knockout member in synchronization with the advance / retreat operation of the punch, and a plurality of blanks for discharging the blank discharged from the upper die to the lower die in front of the machine base. In a multi-stage press forming machine equipped with a chuck, the motor with a deburring member attached to the rotary shaft advances and retreats with respect to the ram within a predetermined die attachment hole of at least the second and subsequent stages of the machine base. Is slidably supported in the direction in which the deburring member is moved when the chuck transfers the blank to the predetermined die mounting position. A multistage forging machine, wherein the knockout drive mechanism is provided with a motor advancing / retreating means for pushing the motor to a position where the blank comes into contact with the blank. 2. The multi-stage forging machine according to claim 1, wherein a chuck for transferring the blank to a predetermined die mounting position is provided with an abutting portion for abutting and supporting the blank. 3. A plurality of forging stations each having a die attached to a machine base and a punch attached to a ram that advances and retracts with respect to the machine base, and includes a die from an upper die to a lower stage on a front surface of the machine base. In a multi-stage forging machine equipped with a plurality of chucks for transferring blanks to the die, a motor with a turning member attached to the rotary shaft is placed in the direction perpendicular to the moving direction of the chuck below the final forging station. An elastic body that is slidably supported and that biases the motor toward the front surface of the machine base is provided. A recess having a curved surface is provided in the center of the turning member in contact with the blank, and the chuck transfers the blank to the lower stage of the final forging station. In this case, the motor is urged by the elastic body to a position where the recess contacts the blank. 4. A chuck for transferring the blank to the lower stage of the final forging station is provided with a contact portion for contacting and supporting the blank, and a guide member for supporting the chuck against the biasing force of the elastic body is provided. The multi-stage press forming machine according to claim 3, wherein