JP4587101B2 - Transfer chuck in forging machine - Google Patents

Description

  In the present invention, a chuck frame is provided on the front surface of a die block in which a plurality of dies are arranged side by side so as to be reciprocally swingable in the direction in which the dies are arranged, and a chuck unit having an open / close chuck and an open chuck is provided on the front surface of the chuck frame. The present invention relates to a transfer chuck in a forging machine that is attached in a replaceable manner.

Conventionally, as this type of transfer chuck, for example, a support shaft is used as a tube shaft, and a pair of open / close chucks are supported at its lower ends so as to be freely opened and closed. The operation rod that opens and closes the chuck is inserted through the movement of the chuck, and the lever that swings in conjunction with the reciprocation of the ram is pivotally supported so that the free end of the lever is engaged with the operation rod. The chuck is configured to open and close in conjunction with the ram, while a first gear having an axial center in the vertical direction is provided above an intermediate position between adjacent dies of the die block, and in conjunction with the reciprocating motion of the ram. A second gear is rotatably supported on a rocking body (chuck frame) that produces rocking of a constant angle with the left and right rocking angles centered on the axis of the first gear, and fixed to the center of the second gear. The above-mentioned The workpiece held by the opening and closing chuck is rotated 180 ° with both gears engaged so that the first gear and the second gear can move to a close meshing position and a non-meshing position separated from each other. In addition, there is known one in which both gears are transferred to the front face to another adjacent die while maintaining the original posture in the non-engaged state.
Japanese Utility Model Publication No. 62-35545

  However, according to the above-described transfer chuck, by selecting the meshing position where the first gear and the second gear are close to each other and the non-meshing position where they are separated from each other, the work held by the opening / closing chuck is rotated 180 °. Although it is possible to transfer or parallel transfer while maintaining the original posture, the chuck frame is provided with an open / close chuck for rotation transfer so that it cannot be attached / detached. Cannot be replaced with an open / close chuck for parallel transfer or an open chuck for parallel transfer according to the workpiece and shape, so that the range of use is limited to specific workpieces. Met. Further, since the opening / closing chuck is opened / closed by rotating the tube shaft, the chuck of the support shaft is opened / closed. Therefore, there is a problem that the structure is complicated and the assembly is complicated.

  Therefore, the present invention can be used as a rotary transfer opening and closing chuck as a unit and can be normally used as a rotary transfer opening and closing chuck. It can be easily and easily replaced with a chuck unit with an open / close chuck or an open chuck for parallel transfer, and the rotation and vertical movement of one drive shaft makes it possible to rotate the chuck 180 ° and open and close the chuck. It is an object of the present invention to provide a transfer chuck in a forging machine that can be carried out accurately with the above.

  In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is provided with a chuck frame on the front surface of a die block in which a plurality of dies are arranged side by side so as to be reciprocally swingable in the direction in which the dies are arranged. A transfer chuck in a forging machine in which a chuck unit having an open / close chuck and an open chuck is replaceably mounted on the front surface of a frame, and a support base that supports a pair of open / close chucks on a lower support portion of the chuck body in the chuck unit. The drive shaft for opening and closing the chuck is supported by the upper support portion of the chuck body so as to be able to rotate and move up and down while being rotatably supported, and the lower end of the drive shaft is connected to the chuck via a connection mechanism. The chuck is opened and closed by moving up and down, while the lower part of the drive shaft cannot rotate to the center of the support base and is axial Movably supports, characterized in that the support table by the rotation of the drive shaft and to rotate 180 ° relative to the chuck body.

  In addition to the configuration described in claim 1, the invention described in claim 2 of the present application has a trajectory in which the chuck unit moves between dies by reciprocating rocking above an intermediate position between adjacent dies of the die block. In addition, a first gear provided with a pitch circle is provided, and a cylindrical shaft having a second gear meshing with the first gear is rotatably supported on the upper support portion of the chuck body and is driven into the cylindrical shaft. The upper part of the shaft is inserted so as not to rotate and is movable in the axial direction. When the chuck unit is reciprocally swung, the drive shaft is rotated by meshing with the first gear and the second gear, and the support base is rotated 180 with respect to the chuck body. It is characterized by being rotated.

  In addition to the configuration described in claim 2, the invention described in claim 3 of the present application is provided with a bracket that rises upward on the front surface of the upper support portion of the chuck body while providing a connecting portion at the upper end portion of the drive shaft. A rocker arm that pivotally supports the base of the swing lever that the intermediate portion engages with the connecting portion and that moves up and down in conjunction with the reciprocating motion of the ram at the free end of the swing lever. The drive shaft is moved up and down by swinging the swing lever by the rocker arm.

  In addition to the structure described in claim 1, the invention described in claim 4 of the present application is such that the open / close chuck is pivotally supported on the support base in an intersecting manner, and the swing coupling provided near the shaft support portion of the open / close chuck is provided. When the drive shaft is connected to the open / close chuck via the plate and the open / close chuck is opened, the shaft support point between each swing connecting plate on the drive shaft and the swing plate on the open / close chuck becomes a triangular shape. When is closed, the three fulcrum support points approach a straight line, and the hinge is opened to generate a strong grip force.

  Further, in the invention described in claim 5 of the present application, in addition to the configuration described in claim 2, a pointer is provided at the upper end of the drive shaft, and the position where the drive shaft is rotated 180 ° in the chuck body is visually confirmed. When the indicator bar is provided so that the pointer can be stopped at a predetermined position with respect to the indicator bar, a detector is provided to detect whether the pointer stops at the predetermined position with respect to the indicator bar. The machine is configured to be stopped by an output signal from.

  According to the transfer chuck in the forging machine of the present invention, since the chuck unit having the open / close chuck for 180 ° rotation transfer is formed, it can be normally used as the open / close chuck for rotation transfer, but it can be used in the shape of the workpiece and the forming sequence. This chuck unit can be removed and replaced with an optimal existing chuck unit for parallel transfer or an open chuck for parallel transfer, and can be opened and closed by rotating and vertically moving one drive shaft. The rotation of the chuck by 180 ° and the opening and closing of the chuck can be accurately performed with a simple structure.

  Further, a cylindrical shaft having a second gear meshing with a first gear provided above an intermediate position between adjacent dies of the die block is rotatably supported by an upper support portion of the chuck body and driven into the cylindrical shaft. The upper part of the shaft is inserted so as not to rotate and is movable in the axial direction. When the chuck unit is reciprocally swung, the drive shaft is rotated by meshing with the first gear and the second gear, and the support base is rotated 180 with respect to the chuck body. If it is rotated, the drive shaft can be rotated while allowing its vertical movement with a simple configuration.

  Also, a bracket that rises upward is provided on the front surface of the upper support portion of the chuck body, and the base portion of the swing lever that engages with the upper end coupling portion of the drive shaft is pivotally supported on the bracket, and the swing lever If the rocker arm that moves up and down in conjunction with the reciprocating movement of the ram is engaged with the free end of the rocker, and the drive shaft is moved up and down by rocking of the rocking lever by the rocker arm, 180 ° rotation transfer Even when the open / close chuck for mounting is mounted away from the front surface of the die, the rocker arm normally used in the open / close chuck for parallel transfer can be used as it is.

  In addition, the open / close chuck is pivotally supported on the support base in a crossing manner, and the drive shaft is connected to the open / close chuck via a swing coupling plate provided near the shaft support portion of the open / close chuck. The shaft fulcrum of each oscillating connecting plate in the shaft and the oscillating connecting plate in the open / close chuck are triangular. If it is configured to generate a strong gripping force, the workpiece can be pinched by the open / close chuck reliably and firmly using the tension action.

  In addition, a pointer is provided at the upper end of the drive shaft, and a display bar is provided on the chuck body so that the position where the drive shaft is rotated 180 ° can be visually confirmed, while the pointer is stopped at a predetermined position with respect to the display bar. If a detector is provided to detect whether or not the pointer stops at a predetermined position with respect to the display bar, the machine is stopped by an output signal from the detector. It is possible to confirm whether it is the predetermined normal position by both the visual inspection of the operator and the detector, and when the rotation of the drive shaft is insufficient or over and does not stop at the predetermined position accurately, the detector Therefore, it is possible to forcibly stop the machine, so that it is possible to prevent production of defective products, damage to chucks and tools, and the like.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a forging machine equipped with a transfer chuck according to the present invention, and a die block 3 is disposed at a predetermined position of a machine base 2 in the forging machine 1, and the die block 3 includes: A plurality of dies 4... 4 ranging from rough to fine are arranged in parallel at regular intervals. Further, a ram (not shown) that moves back and forth with respect to the die block 3 is provided at a front position of the die block 3, and a plurality of rams are provided on the front surface of the ram so as to face the dies 4. A punch is provided.

  Above the die block 3, a transfer chuck 5 for sequentially conveying the material from the front die to the final die is provided. The transfer chuck 5 is a frame member disposed on the machine base 2. 6 and a pair of left and right swing arms 7 and 7 which are pivotally mounted at one end on both side portions of the frame member 6, and both side portions at the other end of the swing arms 7 and 7, respectively. A chuck frame 8 that is rotatable, an intermediate frame 9 that is rotatably connected to the pair of swing arms 7 and 7 between the chuck frame 8 and the frame member 6; A plurality of chuck units A, B, and C are provided on the front surface of the chuck frame 8 at the same interval as the parallel arrangement intervals of the dies 4 and as many as the dies 4. On one side of the chuck frame 8, the chuck frame 8 is reciprocated in the direction in which the dies 4 are juxtaposed by a drive rod R that is reciprocated with a predetermined stroke in synchronism with the advancing and retreating operation of the ram. Each chuck unit A, B, C attached to the front surface of the frame 8 is driven to reciprocate between the positions of the axial front surfaces of adjacent dies 4. Here, of the chuck units A, B, and C, the chuck unit A is an existing chuck unit provided with an opening / closing chuck for parallel transfer as shown in FIG. 5, and the chuck unit B is also a rotation shown in FIG. This is an existing chuck unit provided with an open chuck for parallel transfer, and details thereof are omitted.

  3 and 4, the chuck unit B according to the present invention includes a cassette-structured chuck body 11 that is detachably attached to the front surface of the chuck frame 8, and a lower support portion of the chuck body 11. A support base 14 that pivotally supports a pair of open / close chucks 12 and 13 is supported by 11a through a cylindrical portion 14a formed at the center thereof, and can be rotated only, and a cylinder described later on an upper support portion 11b of the chuck body 11. A drive shaft 15 that opens and closes the chucks 12 and 13 via the shaft is supported so as to be movable up and down and rotatable. Then, the lower portion of the drive shaft 15 is inserted into the cylindrical portion 14a, the lower end thereof is connected to the chucks 12 and 13 via a connecting mechanism described later, and the chucks 12 and 13 are opened and closed by the vertical movement of the drive shaft 15, The lower part of the drive shaft 15 is supported at the central portion of the support base 14 so as not to rotate and is movable in the axial direction, and the support base 14 is integrally rotated by the rotation of the drive shaft 15. As a structure for supporting the drive shaft on the support base 14 so as not to rotate and to be movable in the axial direction, for example, a connection using a long hole and a pin or a spline connection may be employed.

  A first gear provided with a pitch circle is provided on the upper part of the intermediate frame 9 in accordance with the trajectory of the chuck unit B moving between the dies by reciprocating swinging, while a second gear 17 meshing with the first gear 16 is provided. The cylindrical shaft 18 is supported on the upper support portion 11b of the chuck body 11 so as to freely rotate, and the upper portion of the drive shaft 15 is inserted into the cylindrical shaft 18 so as not to rotate but to move in the axial direction. When the unit B is reciprocally swung, the drive shaft 15, that is, the support base 14 is rotated by 180 ° with respect to the chuck body 11 by the meshing of the first gear 16 and the second gear 17. As a structure for supporting the upper portion of the drive shaft 15 in the cylinder shaft 18 so as not to rotate and to be movable in the axial direction, for example, a combination of a long hole and a pin or a spline connection may be employed.

  A biasing spring 19 that normally biases the drive shaft 15 downward is provided between the lower surface of the upper support portion 11 b of the chuck body 11 and the intermediate portion of the drive shaft 15, while a connecting portion is provided at the upper end of the drive shaft 15. 15a is provided, and a bracket 21 that rises upward is provided on the front surface of the upper support portion 11b of the chuck body 11. The swing lever 22 whose intermediate portion engages with the coupling portion 15a is pivotally supported on the bracket 21 and swings. The rocker arm 23 that moves up and down in conjunction with the reciprocating movement of the ram is engaged with the free end of the lever 22, and the drive shaft 15 is moved up and down by the rocking of the rocking lever 22 by the rocker arm 23. ing. That is, by swinging the swing lever 22 upward at the tip of the rocker arm 23, the drive shaft 15 is lifted against the biasing spring 19 to open the open / close chucks 12 and 13, and the rocker arm 23 By swinging the front end portion of the drive shaft 15 downward, the drive shaft 15 and the swing lever 22 are moved downward by the biasing spring 19 to close the open / close chucks 12 and 13 and grip the workpiece. As a driving means for the rocker arm 23, as is well known, the peripheral cam 25 is fixed to the cam shaft 24 that rotates in conjunction with the reciprocating motion of the ram, and the peripheral cam 25 is fixed to the support 26 fixed to the frame member 6. The rocker arm 23 is supported on the upper surface of the intermediate frame 24 to support the cam arm 27 that is swung with the rotation of the cam arm 27 and engages with the tip of the cam arm 27. The swing lever 22 protruding rearward from the upper end of the chuck main body 11 is engaged with this portion.

  On the other hand, a pair of opening and closing chucks 12 and 13 composed of claw portions and arm portions are pivotally supported on the support base 14 in a crossing manner, and swing coupling plates 28 and 29 provided near the shaft supporting portions of the opening and closing chucks 12 and 13. When the drive shaft 15 is connected to the open / close chucks 12 and 13 via the open / close chucks 12 and 13 and the open / close chucks 12 and 13 are opened, the shaft fulcrum of the swing connection plates 28 and 29 in the drive shaft 15 and the open / close chucks 12 and 13 When the pivot points of the moving plates 28 and 29 are triangular and the open / close chucks 12 and 13 are closed, the three pivot points approach a straight line and the hinges are opened to generate a strong grip force. It is configured as follows. As a result, the workpiece can be pinched by the open / close chucks 12 and 13 reliably and firmly by using the tensioning action, and there is no shake-off at the time of transfer, and the speed of workpiece transfer can be increased.

  The chuck unit B provided with the rotary transfer opening / closing chuck configured as described above is attached to the chuck frame 8 in the screw holes 8a and 8a provided at predetermined positions on the front surface of the chuck frame 8 in the boss portion of the chuck body 11. If bolts 31 and 31 inserted through 11c and 11c are fastened, they can be mounted at once. Accordingly, the chuck unit B may be replaced with the existing chuck unit, for example, the chuck unit A having the parallel transfer opening / closing chuck shown in FIG. 5 or the rotation parallel shown in FIG. It can be easily and quickly replaced with a chuck unit C having an open chuck for transfer or a chuck unit (not shown) having an open chuck for parallel transfer.

  Further, the lower portion of the drive shaft 15 is supported at the center portion of the chuck support base 14 rotatably supported by the lower support portion 11a of the chuck body 11 so as not to rotate but to be movable in the axial direction. The cylindrical shaft 18 having the second gear 12 that meshes with the first gear 16 provided above the intermediate position between the adjacent dies of the die block 3 is provided above the chuck body 11. The first gear 16 is supported by the support portion 11b so as to be freely rotatable, and the upper portion of the drive shaft 15 is inserted into the cylindrical shaft 18 so as not to rotate but to be movable in the axial direction. Since the driving shaft 15 is rotated by meshing with the second gear 17 so that the support base 14 is directly rotated 180 degrees with respect to the chuck body, the rotation and vertical movement of one driving shaft 15 are performed. It is possible to accurately and closing of the 180 ° rotation and the chuck 12, 13 of opening and closing chuck 12, 13 with a simple structure by.

  In addition, a bracket 21 that rises upward is provided on the front surface of the upper support portion 11b of the chuck body 11, and a pivot lever 22 whose intermediate portion engages with the upper end coupling portion 15a of the drive shaft 15 is pivotally supported on the bracket 21. Further, the rocker arm 23 that moves up and down in conjunction with the reciprocating motion of the ram is engaged with the free end of the rocking lever 22, and the drive shaft 15 is moved up and down by 22 rocking of the rocking lever by the rocker arm 23. Therefore, even when mounting the open / close chucks 12 and 13 for 180 ° rotation transfer away from the front surface of the die, the rocker arm drive mechanism that is normally used in the open / close chuck for parallel transfer is used as it is. Can be shared.

  Further, in the embodiment shown in the figure, a pointer 36 is provided at the upper end of the drive shaft 15 as shown in FIG. 3, and the chuck body 11 is displayed so that the position where the drive shaft 15 is rotated 180 ° can be visually confirmed. While the bar 37 is provided, a detector 38 such as an appropriate sensor for detecting whether the pointer 36 has stopped at a predetermined position with respect to the display bar 37 is provided, and the pointer 36 is at a predetermined position with respect to the display bar 37. When not stopping, the machine is stopped by the output signal from the detector 38. Thereby, it can be confirmed by both the operator's visual observation and the detector 38 whether or not the rotational position of the drive shaft 15 is a predetermined normal position, and the rotation of the drive shaft 15 is insufficient or excessive. Since the machine can be forcibly stopped by the detector 38 when it does not stop accurately at a predetermined position, production of defective products, damage to the chuck and tools, etc. can be prevented.

  Further, as a means for attaching the chuck unit B to the chuck frame 8, in addition to the pair of bolts 31, 31, for example, a pair of attachment pins provided with a tip locking groove from the chuck frame 8 as shown in FIG. A pair of U-shaped screws 35 with washers 34 that can be engaged with and disengaged with respect to the locking grooves are rotatably provided on the chuck body 11, and the pair of screws 35 is 1 as shown in FIG. If the U-shaped washer 34 is rotated by rotating it and the engagement between the washer 34 and the mounting pin 33 is released or engaged, the chuck unit B can be detached from the chuck frame 8 with one touch. Can do.

  It is a partially cutaway side sectional view showing an embodiment of the present invention.   It is the same part notch flat sectional view.   FIG. 4 is a partially omitted illustration of the chuck unit according to the present invention.   It is explanatory drawing which shows the clamping state of the chuck unit.   It is explanatory drawing of the chuck | zipper unit which has an opening / closing chuck | zipper for parallel transfer.   It is explanatory drawing of the chuck unit chuck | zipper which has an open chuck for rotation transfer.   It is explanatory drawing of another chuck unit.   It is explanatory drawing which shows the attachment or detachment operation | movement of the same chuck unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Forging machine 3 Die block 4 Die 5 Transfer chuck 8 Chuck frame B Chuck unit 11 Chuck body 12 Opening / closing chuck 13 Opening / closing chuck 14 Support base 15 Drive shaft 15a Connecting part 16 First gear 17 Second gear 18 Tube shaft 28 Swing connection Plate 36 Pointer 37 Display bar 38 Detector

Claims (5)

  A chuck frame is installed on the front of the die block where multiple dies are arranged side by side so that it can swing back and forth in the direction in which the dies are arranged side by side. A transfer chuck in the forging machine, wherein a support base that supports a pair of opening and closing chucks is rotatably supported on a lower support portion of the chuck body in the chuck unit, and the chuck is opened and closed on an upper support portion of the chuck body. The drive shaft is supported in a vertically movable and rotatable manner, while the lower end of the drive shaft is connected to the chuck via a connecting mechanism, and the chuck is opened and closed by the vertical movement of the drive shaft, while the lower portion of the drive shaft is located at the center of the support base The support base is chucked by the rotation of the drive shaft. Transfer chuck in forging machine, characterized in that it has to rotate 180 ° relative to the body.   A first gear provided with a pitch circle is provided above the intermediate position between adjacent dies of the die block so that the chuck unit moves between the dies by reciprocating rocking, and the second gear meshes with the first gear. The chuck unit is reciprocally oscillated by rotatably supporting the cylinder shaft with the upper support part of the chuck body and inserting the upper part of the drive shaft into the cylinder shaft so that it cannot rotate but can move in the axial direction. 2. The transfer chuck in a forging machine according to claim 1, wherein the driving shaft is rotated by meshing the first gear and the second gear to rotate the support base 180 degrees relative to the chuck body.   A connecting part is provided at the upper end of the drive shaft, while a bracket that rises upward is provided on the front surface of the upper support part of the chuck body, and the base part of the swing lever that the intermediate part engages with the connecting part is supported on the bracket. In addition, the rocker arm that moves up and down in conjunction with the reciprocating motion of the ram is engaged with the free end of the rocking lever, and the drive shaft is moved up and down by rocking of the rocking lever by the rocker arm. The transfer chuck in the forging machine according to claim 2.   The open / close chuck is pivotally supported on the support base in a crossing manner, and the drive shaft is connected to the open / close chuck via the swing coupling plate provided near the shaft support portion of the open / close chuck. The pivot point of the pivot coupling plate and the pivot coupling plate of the open / close chuck is triangular, and when the open / close chuck is closed, the three pivot points approach a straight line and the hinge is open. 2. A transfer chuck in a forging machine according to claim 1, wherein the transfer chuck is configured to generate a strong grip force.   Whether a pointer is provided at the upper end of the drive shaft and a display bar is provided on the chuck body so that the position where the drive shaft is rotated 180 ° can be visually confirmed. 3. The detector according to claim 2, wherein a detector is provided to detect the machine, and the machine is stopped by an output signal from the detector when the pointer does not stop at a predetermined position with respect to the display bar. Transfer chuck in forging machine.

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