JP6661471B2 - Transfer device for multi-stage forging press - Google Patents

Description

  The present invention relates to a transfer device of a multi-stage forging press, and more particularly to a transfer device of a multi-stage forging press capable of easily replacing a chuck claw for holding a work.

  A multi-stage forging press in which a plurality of forging sections including a die and a punch are horizontally arranged in parallel with each other is provided with a transfer device for transferring a work to the next forging section. And Patent Document 2.

This type of transfer device has a plurality of chuck units corresponding to the number of stages of the forging section, and the work is held by a pair of chuck claws provided at the tip thereof and transported to the forging section in the next step. .
The chuck claws are exchanged when the workpiece (forged product) to be processed has a different outer diameter.
However, since the chuck pawl is usually located between the die and the punch and below the chuck unit (tip side), the operator must perform replacement work in a narrow place, and the working posture is unnatural. It has problems in workability and safety.
For this reason, in order to facilitate the replacement work, it is desirable to move the chuck unit to a place where the work can be easily performed in advance.

However, in this type of transfer device, a main motor for driving a press ram is used as a power source for conveying and moving a work to the next forging section, and the power of the main motor is transmitted by a gear, a cam, and a link mechanism. In this case, the power is transmitted to a transfer beam or the like to which the chuck unit is attached via a power transmission mechanism configured as described above.
For this reason, in the conventional transfer device, the structure around the chuck unit is complicated and the number of parts is large, and these become obstacles when the chuck unit is moved to a place where the replacement operation is easily performed, and the movable range is limited. There was a problem.

  Patent Document 2 below discloses an invention relating to “transfer chuck in a forging machine”, in which a chuck unit having a chuck (chuck pawl) is fastened and fixed to a chuck frame by a bolt, It is disclosed that the chuck unit is replaced with a chuck unit having a different chuck shape in accordance with a change in the shape, molding order, or the like, but this does not mean that the chuck unit is moved to a position where the work can be easily performed in the replacement operation.

JP 2013-78791 A Japanese Patent No. 4605523

  SUMMARY OF THE INVENTION In view of the above circumstances, the present invention is a multi-stage forging press in which a plurality of chuck units can be collectively moved to a place where replacement can be easily performed, and the replacement of chuck claws can be easily performed. The purpose of the present invention is to provide a transfer device for a machine.

According to a first aspect of the present invention, there is provided a multi-stage forging press provided with a multi-stage forging press in which a plurality of forging units are arranged in a horizontal direction, and a transfer of a multi-stage forging press for sequentially transferring a work to a next forging unit. An apparatus comprising: (a) a plurality of chuck units for holding a work; (b) a slide plate holding the plurality of chuck units and movable in the horizontal and vertical directions ; and (c) the slide plate. a base plate for holding, (d) is connected via the slide plate and the first link mechanism, a servo motor for the horizontal drive which imparts horizontal driving force to the slide plate, and (e) the slide plate A vertical drive servomotor connected via a second link mechanism to apply a vertical drive force to the slide plate; A vertical drive servomotor which is mounted on the base plate in a direction opposite to the slide plate with the output shaft extending in the vertical direction, and (f) a rotating shaft and the base plate. A rotation moving unit that is connected and fixed by a connection member and rotates the base plate around the axis of the rotation shaft , wherein the second link mechanism is supported by the base plate and extends in opposite directions. A swing member having a holding arm and an extension lever, wherein the holding arm is connected to the slide plate, and the extension lever is connected to a nut of a ball screw attached to an output shaft of the servomotor for vertical driving. The base plate, the vertical drive servomotor, and the second With click mechanism rotates moving the plurality of chuck units, wherein the rotary shaft with respect to the forging unit is characterized in that no such inverting the chuck unit in the opposite position.

Those claims 2 Oite to claim 1, the rotation range of the rotation moving means and wherein substantially 180 ° der Turkey.

  As described above, the present invention is such that a plurality of chuck units and a slide plate holding these chuck units are rotated and moved together with a base plate. According to the present invention, the plurality of chuck units are collectively replaced. The position can be moved to a place where work is easy.

In the present invention, a horizontal drive servomotor is provided as a power source for driving the slide plate in the horizontal direction, and the servomotor is connected to the slide plate via a link mechanism.
According to the present invention, the power transmission from the main motor driving the press ram can be made unnecessary by using a complicated cam mechanism as compared with the conventional configuration in which the power is transmitted using gears, cams, link mechanisms, and the like. The mechanism can be configured to be compact with a small number of parts. For this reason, in the present invention, parts that can be obstacles when the chuck unit is rotationally moved can be reduced as much as possible, and a wide rotatable range can be secured.

Japanese in the rotation range of the rotary movement means as substantially 180 °, the forging unit with respect to the axis of rotation about a chuck unit is located moves to the position opposite to and where if to invert the chuck unit, Since the chuck claw is just upward in the maintenance space prepared at a position distant from the forged portion, the workability can be further improved.

By the way, the transfer device, when transporting and moving the work to the next forging section, in addition to the horizontal direction where a plurality of forging sections are juxtaposed, and the horizontal direction to avoid interference with punches and dies May also be moved in a vertical direction perpendicular to the direction.
In this case, in addition to the power transmission mechanism in the horizontal direction, a power transmission mechanism in the vertical direction also exists around the chuck unit, and parts that can be obstacles when rotating and moving the chuck unit increase and can rotate. It becomes difficult to secure a wide range.

However, according to the present invention , if the vertical drive servo motor, which is a power source for vertical drive, is configured to be attached to the base plate, the vertical drive servo motor and the slide plate to be driven can be arranged close to each other, A link mechanism as a power transmission mechanism disposed between the vertical drive servomotor and the slide plate can be configured to be shorter and more compact.
In addition, according to the present invention , since the vertical drive servomotor and the vertical drive link mechanism rotate with the base plate, parts of the power transmission mechanism remain on the base side of the press machine and become obstacles during the rotational movement. Can be effectively prevented.

Here, if a part of the power transmission mechanism for vertical drive remains on the base side of the press machine, it is necessary to perform trimming before rotating the chuck unit. However, according to the present invention , since all the power transmission mechanisms for vertical driving including the power source are included on the side that rotates, the edge cutting operation can be omitted.

  ADVANTAGE OF THE INVENTION According to this invention as mentioned above, the transfer apparatus of the multistage forging press machine which can easily perform the replacement | exchange operation of a chuck | claw by moving a plurality of chuck units collectively to the place where replacement | exchange work is easy to perform is performed. Can be provided.

1 is a plan view of a multi-stage forging press provided with a transfer device according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a main part of the transfer device of FIG. 1. It is sectional drawing of the same transfer apparatus. FIG. 3 is a diagram showing a configuration of a first link mechanism 50. FIG. 3 is a diagram showing a configuration of a rotation moving unit 81. FIG. 4 is a diagram illustrating a state in which a chuck unit is rotationally moved.

Next, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing a multi-stage forging press equipped with the transfer device of the present embodiment.
In FIG. 1, reference numeral 10 denotes a multi-stage forging press (hereinafter, sometimes referred to as a forging press), which is a plurality of (here, three stages) for forging a work inside a box-shaped frame 12. Forged parts are arranged side by side at regular intervals in the horizontal direction.
The forged portion includes a die 14 (FIG. 3) fixed to the frame 12 and a punch 16 arranged to face the die 14.
Each of the punches 16 is mounted on the tip of a ram 18, and the material (work) is simultaneously formed in each forged portion by the forward movement of the ram 18.

In the forging press 10 of the present embodiment, a main motor 20 is provided as a power source of the ram 18. The main motor 20 is connected to a flywheel 24 via a belt 22, and the flywheel 24 is connected to a ram 18 via a crankshaft 26.
Specifically, a pinion gear 27 provided at an end of the flywheel shaft 25 opposite to the flywheel 24 and a large gear 28 provided at an end of the crankshaft 26 are connected in a meshing state.
Therefore, in this example, the flywheel 24 is rotated by the power of the main motor 20, and the ram 18 moves forward and backward by the power. That is, the punch 16 mounted on the tip of the ram 18 advances and retreats with respect to the die 14, and forging is performed.

In the forging press 10 configured as described above, the material (work W) supplied from the outside is cut into a predetermined size by a cutter (not shown), and then sequentially passes through the three-stage forging section. Thereby, it is formed into a predetermined shape. At this time, the transfer of the work W to each forging portion is performed by a transfer device 30 described later.
Then, the forged product is carried out of the machine by a carry-out device (not shown).

As shown in FIG. 1, the forging press 10 of this embodiment has an upper surface of a frame 12 opened at a portion where a forged portion is arranged, and a main body of a transfer device 30 is located above the die 14 in this open space. The parts are arranged.
FIG. 2 is a perspective view showing a main part of the transfer device 30.
As shown in the figure, in the transfer device 30, three plates are vertically opposed to each other in the order of a base plate 34, a first plate 38, and a second plate 40, and a chuck unit 42 is mounted on the second plate 40. Have been.

The base plate 34 has a flat support surface 36.
The base plate 34 is fixed to the frame 12 of the forging press 10 so that the support surface 36 is parallel to the horizontal direction (the direction in which the dies 14 are arranged) and the vertical direction perpendicular to the horizontal direction.
A guide rail 46 for horizontally holding the adjacent first plate 38 is attached to the support surface 36 in a horizontal direction.

  An engagement block 47 that engages with the guide rail 46 is attached to a surface of the first plate 38 that faces the support surface 36 of the base plate 34. A plurality of balls are disposed between the guide rail 46 and the engagement block 47, and a linear guide is formed by the guide rail 46 and the engagement block 47. It is slidable in the horizontal direction (the direction in which the dies 14 are arranged side by side).

As shown in FIG. 4, a horizontal drive servomotor 49 for driving the first plate 38 in the horizontal direction is connected to the first plate 38 via a first link mechanism 50.
The horizontal drive servomotor 49 has its output shaft 51 fixed to the forging press 10 in a direction orthogonal to the sliding direction of the first plate 38.

A crankshaft 52 is attached to a tip of an output shaft 51 of the horizontal drive servomotor 49, and one end of a first rod 53 is rotatably connected to the crankshaft 52. The other end of the first rod 53 is rotatably connected to a second rod 54 extending horizontally from the first plate 38 via a connecting portion 48.
Here, the second rod 54 is movable only in the horizontal direction along the guide shaft 57 shown in FIG. 4B.
In this example, the crankshaft 52, the first rod 53, and the second rod 54 constitute a first link mechanism 50.

In this example, when the output shaft 51 of the horizontal drive servomotor 49 reciprocates or rotates in one direction within a predetermined angle range, the movement is converted into a horizontal reciprocation by the first link mechanism 50 and the first plate 38 is moved. Is transmitted to Thereby, the first plate 38 also reciprocates in the horizontal direction.
According to this example, the horizontal stop position of the first plate 38 can be easily changed to an arbitrary position by changing the rotation amount of the output shaft 51 of the horizontal drive servomotor 49.

  A guide rail 55 for holding the second plate 40 so as to be slidable is attached to the surface of the first plate 38 opposite to the base plate 34 in the vertical (up and down) direction.

  As shown in FIGS. 2 and 3, the second plate 40 is provided with an engagement block 56 that engages with the guide rail 55 on a surface facing the first plate 38. A plurality of balls are provided between the guide rail 55 and the engagement block 56, and a linear guide is formed by the guide rail 55 and the engagement block 56. The second plate 40 It is slidable up and down with respect to the base plate 34 via the base plate 34.

As shown in FIG. 3, a servomotor 58 for vertical drive is connected to the second plate 40 via a second link mechanism 60.
The vertical drive servomotor 58 is attached to the base plate 34 at a position on the back surface side (opposite to the support surface 36) of the base plate 34 with the output shaft 61 extending in the vertical direction. Specifically, it is attached to a bracket 71 that is integral with the base plate 34.
A shaft 62 having an external thread formed on the outer peripheral surface is attached to an output shaft 61 of the servomotor 58 for vertical drive, and a nut 63 having an internal thread formed on the inner peripheral surface is fitted around the shaft 62. ing. A plurality of balls are arranged between the male screw and the female screw, and a ball screw is formed by the shaft 62 and the nut 63.

A pair of pins 59 projecting radially outward is provided on the outer peripheral surface of the nut 63, and one end of an intermediate lever 64 is rotatably connected to the pins 59. The other end of the intermediate lever 64 is rotatably connected to an extension lever 65 that extends toward the nut 63 from a central portion in the axial direction of a swing member 66 described later.
As shown in FIGS. 2 and 3, a shaft rod 68 extending in the horizontal direction is supported by a pair of brackets 67 fixed to the base plate 34, and the swing member 66 can swing with respect to the shaft bar 68. Attached to.

From both ends of the swing member 66, a pair of holding arms 69 extend toward the second plate 40 in a direction opposite to the extending lever 65, and hold the guide shaft 70.
The guide shaft 70 is provided in parallel with the guide rail 46 of the base plate 34, and a slide block 72 is attached to the guide shaft 70 so as to be slidable in the axial direction and rotatable about the axis.
The distal end of the slide block 72 is rotatably connected to the second plate 40 via a connection shaft 73 (FIG. 3).
In this example, the pin 59, the intermediate lever 64, the swing member 66, the guide shaft 70, the slide block 72, and the connecting shaft 73 constitute a second link mechanism 60.

In this example, when the vertical drive servomotor 58 rotates the output shaft 61, the rotational motion of the servomotor is converted into a vertical linear motion of the nut 63 by the screw feed action of the ball screw.
For example, when the nut 63 moves upward, the swing member 66 swings about the shaft rod 68 in a direction to push down the guide shaft 70 downward, and the swing member 66 is connected via the guide shaft 70 and the slide block 72. The two plates 40 move downward.
Conversely, when the nut 63 moves downward, the swinging member 66 swings about the shaft rod 68 in the direction of lifting the guide shaft 70 upward, and the second plate 40 moves upward.
According to this example, the vertical stop position of the second plate 40 can be easily changed to an arbitrary position by changing the rotation amount of the output shaft 61 of the vertical drive servomotor 58.

The slide block 72 is slidable in the horizontal direction along the guide shaft 70. When the first plate 38 slides in the horizontal direction, the second plate 40 moves in the horizontal direction together with the first plate 38. However, no interference occurs in the second link mechanism 60.
In the present example, the slide plate that holds the plurality of chuck units 42 and can move in the horizontal direction is configured by the first plate 38 that can slide in the horizontal direction and the second plate 40 that can slide in the vertical direction. .

As shown in FIG. 2, the chuck unit 42 has a chuck body 43 and a pair of left and right chuck claws 44, 44 which are located on the tip side (downward in the figure) and hold the work W. Inside the chuck body 43, a cylinder head that moves up and down in the vertical direction by air pressure and a link mechanism connected to the cylinder head are accommodated, and the base end of the chuck pawl 44 is connected to the link mechanism.
In the chuck unit 42, when the cylinder head inside the chuck body 43 is moved up and down by air pressure, the movement is converted into a left and right opening / closing movement by a link mechanism. , 44 also open and close.
As shown in FIG. 2B, the pair of chuck claws 44 of the present example have a straight inner surface for holding the workpiece W, one of which has a straight shape, and the other has a V-groove shape. When the 44, 44 is moved in the closing direction, the pair of chuck claws 44, 44 abut on the outer peripheral surface of the circular work W at three places to clamp the work W.

The transfer of the work W is performed as follows by the transfer device 30 having the above configuration.
In addition, the forging press 10 of this example is a work insertion / extraction unit (not shown) that moves the work in the axial direction of the die and the punch to extract the work W from the die 14 and insert the work W into the die 14. ) Is provided for each forged part. The transfer of the work W is performed in cooperation with the transfer device 30 and the work insertion / extraction means.

  When the forging process is completed and the work W is extracted from the die 14 by the work insertion / extraction means, the transfer device 30 first drives the vertical drive servomotor 58 to open the chuck unit 44 from the original position with the chuck claws 44 opened. 42 is lowered together with the second plate 40 (X1 direction in FIG. 2), and the chuck pawl 44 at the tip of the chuck unit 42 is stopped at a predetermined position. FIG. 3 is a diagram showing the state.

Next, the chuck claws 44 are closed to clamp the work W.
Next, the horizontal drive servomotor 49 is driven, and the chuck unit 42 is moved in the horizontal direction together with the second plate 40 and the first plate 38 while the work W is held between the chuck claws 44 (Y1 direction in FIG. 2). ), The work W is transported to the position of the die in the next step.
The work W conveyed to the position of the die 14 in the next process is held by the above-described work insertion / extraction means, and the transfer device 30 opens the chuck claws 44. The work W is inserted into the die 14 by the work insertion / extraction means.

Next, the transfer device 30 drives the vertical drive servo motor 58 to move the chuck unit 42 together with the second plate 40 (in the X2 direction in FIG. 2) and stop at a predetermined position with the chuck claws 44 opened.
Next, the servomotor 49 for horizontal drive is driven to move the chuck unit 42 in the horizontal direction (Y2 direction in FIG. 2) together with the second plate 40 and the first plate 38, and return to the original position.

The transfer device 30 of the present embodiment includes a rotation moving unit 81 that rotates the base plate 34 with respect to the frame 12.
The rotation moving means 81 is specifically configured as follows.
In FIG. 5, reference numeral 75 denotes a rotating shaft attached to the frame 12 in parallel with the direction in which the forged portions are juxtaposed. I have.

A gear body 76 is attached to one end (the right side in FIG. 5) of the rotating shaft 75.
As shown in FIG. 5B, a motor 77 as a power source is provided above the rotating shaft 75, and a gear 78 is mounted on the output shaft thereof. 76.

On the other hand, a pair of connecting members 74, 74 are provided between the base plate 34 and the rotating shaft 75, and one end of the connecting member 74 is connected and fixed to the base plate 34 and the other end is connected to the rotating shaft 75, respectively.
In this example, the motor 77, the gear bodies 78 and 76, the rotating shaft 75, and the connecting member 74 constitute a rotation moving unit 81.

In a forging press equipped with a transfer device, when changing an object to be processed to a work (forged product) having a different outer diameter, chuck jaws for clamping the work are exchanged.
However, since the chuck pawl is normally located between the die and the punch and below the chuck unit, the replacement work must be performed in a narrow place at the same position, and the working posture is unnatural. That is, there is a problem in workability and safety.

  In the present embodiment, as shown in FIG. 6, the end surface 86 of the frame 12 of the forging press 10 is located at a position opposite to the forging portion with respect to the rotating shaft 75 as a work scaffold for chuck jaw replacement. Then, the deck 80 is installed, and after the chuck unit 42 is rotationally moved to the position of the deck 80 where the nail exchanging operation is easy, the exchanging operation of the chuck jaws 44 is performed.

The procedure for rotating and moving the chuck unit 42 is as follows.
The base plate 34 is normally (during transportation operation) a fixing piece 85 provided on the bottom surface of the connecting member 74 is pressed against the upper surface of the frame 12 by a clamp device or the like, and the position is fixed. The fixing between the fixing piece 85 and the frame 12 is released.
Further, in this example, since the horizontal drive servomotor 49 and the first link mechanism 50 are fixed to the frame 12 side of the forging press 10, the connection between the first link mechanism 50 and the first plate 38 is performed at the connecting portion 48. Cancel.

  Next, by rotating the motor 77, the base plate 34 is rotated around the axis of the rotating shaft 75 together with the rotating shaft 75 and the connecting member 74 via the gear bodies 78 and 76. At this time, the plurality of chuck units 42 held on the base plate 34 via the first plate 38 and the second plate 40 also rotate.

FIG. 6 shows a state where the chuck unit 42 is rotated by 180 ° about the rotation shaft 75 and moved to the position of the deck 80.
As shown in the figure, in this example, the chuck unit 42 is brought up to the position of the deck 80 prepared for maintenance by using the rotation moving means 81, so that a wide work space can be secured.
Further, at this time, when the chuck unit is rotated by 180 ° about the axis of the rotating shaft 75, the chuck claws 44 of the chuck unit 42 are turned upward, so that the replacement operation can be further facilitated.
At this time, if the chuck pawl 44 is set to have a height from the waist to the chest of the operator as shown in the figure, the workability is further improved.

As described above, according to the present embodiment, the plurality of chuck units 42 can be collectively moved to a place where replacement work can be easily performed.
Further, in the present embodiment, since the horizontal drive servomotor 49 as a power source is connected to the first plate 38 to be driven via the first link mechanism 50, the structure is more complicated than the conventional one. Since the cam mechanism is not required, the power transmission mechanism can be made compact and the number of parts can be reduced. For this reason, in the present embodiment, parts that can be obstacles when rotating the chuck unit 42 can be reduced as much as possible, and a wide rotatable range can be secured.

In particular, in the present embodiment, the vertical movement can be performed in addition to the horizontal movement. However, since the vertical driving servomotor 58 as the power source is integrally attached to the base plate 34, the vertical driving The servomotor 58 and the second plate 40 to be driven can be disposed close to each other, and the second link mechanism 60 as a power transmission mechanism disposed between the vertical drive servomotor 58 and the second plate 40 Can be made shorter and compact.
Then, the vertical drive servomotor 58 and the second link mechanism 60 rotate together with the base plate 34, so that parts of the power transmission mechanism remain on the frame 12 side of the press machine 10 and become obstacles during the rotational movement. Can be effectively prevented.

  Further, since the second link mechanism 60 including the vertical drive servomotor 58 of the power source is included in the side on which the second link mechanism 60 is rotationally moved, the cutting operation of the second link mechanism 60 can be omitted.

  The embodiment of the present invention has been described in detail above, but this is merely an example. For example, in the above embodiment, the slide plate is constituted by the first plate 38 movable in the horizontal direction and the second plate 40 movable in the up and down direction. The present invention can be embodied in variously modified forms without departing from the spirit thereof, for example, it can be constituted only by the first plate 38 movable in the direction.

Reference Signs List 10 multi-stage forging press machine 30 transfer device 34 base plate 38 first plate 40 second plate 42 chuck unit 44 chuck jaw 49 horizontal drive servomotor 50 first link mechanism 58 vertical drive servomotor 60 second link mechanism 81 rotational movement Means W Work

Claims (2)

A transfer device of a multi-stage forging press, which is provided in a multi-stage forging press in which a plurality of forging sections are arranged in a horizontal direction, and sequentially transports a work to a next forging section.
(A) a plurality of chuck units for holding a work;
(B) a slide plate that holds the plurality of chuck units and is movable in the horizontal and vertical directions ;
(C) a base plate for holding the slide plate;
( D ) a horizontal drive servomotor connected to the slide plate via a first link mechanism and applying a horizontal driving force to the slide plate;
(E) a vertical drive servomotor connected to the slide plate via a second link mechanism and applying a vertical drive force to the slide plate, wherein the servomotor is opposite to the base plate and the slide plate; A vertical drive servomotor adapted to be attached to the base plate in a direction in which the output shaft extends in the vertical direction,
(F) rotationally moving means for connecting and fixing a rotating shaft and the base plate with a connecting member, and rotating the base plate around the axis of the rotating shaft ;
With
The second link mechanism,
A swinging member having a holding arm and an extension lever that are supported by the base plate and extend in opposite directions, wherein the holding arm is connected to the slide plate, and the extension lever is Comprising a swinging member connected to a nut fitted with a ball screw attached to the output shaft of the vertical drive servomotor,
The plurality of chuck units are rotationally moved together with the base plate, the up / down drive servomotor and the second link mechanism , and the chuck units are inverted at a position opposite to the forging portion with respect to the rotation axis. A transfer device for a multi-stage forging press machine characterized by what has been done. Oite to claim 1, the transfer device of the multi-stage forging press in rotation range of the rotation moving means and wherein substantially 180 ° der Turkey.

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