JP7152639B2 - Transfer device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer device, which is provided in a forging machine or the like that forms and processes a work using dies and punches, and conveys the work from an upstream process to a downstream process.

2. Description of the Related Art A multi-process forging machine is known that has a plurality of forging processes for forming a workpiece using punches and dies. In a multi-process forging machine, a transfer device sequentially conveys a workpiece from an upstream process to a downstream process to proceed with molding. Workpieces that are initially cylindrical in shape are often subjected to load from the direction of extension of the axis to form them into products. However, depending on the shape of the final product, it may be necessary to apply a load from the lateral direction perpendicular to the axis. In this case, it is necessary to rotate the work by 90° and convey it. 2. Description of the Related Art In the technical field of forging and forging, Patent Literature 1 discloses a technical example of rotating and conveying a work.

The press working transfer unit of Patent Document 1 includes a chuck bar that is provided on a base and reciprocates in a work conveying direction, and a plurality of sets of chuck claws attached to the chuck bar. rotates by a certain angle in conjunction with movement in the work conveying direction. Furthermore, the embodiment describes a configuration in which the chuck claws are rotationally driven by meshing a rack provided on the base side and a pinion gear provided on the chuck claw side. According to this, it is effective as a transfer device for various press machines and has a very wide range of application.

JP-A-63-260636

By the way, the technique of Patent Document 1 is premised on a slide type transfer device that moves a plurality of sets of chuck claws in parallel in the work conveying direction. For this reason, the technology disclosed in Japanese Patent Application Laid-Open No. 2002-300000 cannot be implemented in a rotary transfer type transfer device that rotates and moves chuck claws (fingers) from an upstream process to a downstream process.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the background art, and is a transfer device capable of rotating a work conveyed from an upstream process to a downstream process by a predetermined rotation angle in a rotary movement type device configuration. The problem to be solved is to provide

The transfer device of the present invention comprises: a finger supporting portion that supports a finger that grips a work in an upstream process and releases the work in a downstream process; a rotation support that supports the finger support so that it can rotate; A turning drive part that causes the rotation support part to revolve between the upstream process and the downstream process, a link member that extends from the finger support part, and a position that is equidistant from the upstream process and the downstream process. a work rotating part having a link support seat that can be provided to support the link member, and that rotates the finger support part by a predetermined rotation angle as the rotation support part revolves.

In the transfer device of the present invention, the rotation support portion that rotatably supports the finger support portion is conveyed along an arc-shaped trajectory from the upstream process to the downstream process by the turning drive section. During this transfer, the rotation angle of the finger supporting portion is controlled by the work rotating portion, and rotates by a predetermined rotation angle. Therefore, the finger and work also rotate by the same rotation angle. Therefore, the transfer device can rotate a work conveyed from an upstream process to a downstream process by a predetermined rotation angle in a rotary movement type device configuration.

1 is a plan view schematically showing the overall configuration of a multi-process forging machine provided with a transfer device of an embodiment; FIG. 1 is a front view showing the configuration of a transfer device according to a first embodiment; FIG. It is a side view which shows the structure of a transfer apparatus. FIG. 4 is a view taken along line DD of FIG. 3 and is a plan view showing the configuration of the work rotating portion; It is a side view which shows the structure of the transfer apparatus of 2nd Embodiment. FIG. 10 is a diagram illustrating a configuration example of a discharge process and explaining the action of the transfer device of the second embodiment;

First, the overall configuration of a multi-process forging machine 10 provided with the transfer device of the embodiment will be described with reference to FIG. FIG. 1 is a plan view schematically showing the overall configuration of a multi-process forging machine 10. As shown in FIG. The multi-process forging machine 10 is composed of a frame 21, a ram 24, five sets of punches 26 and dies 23, a transfer device 1, a driving section 9, and the like. The multi-process forging machine 10 sequentially forms the workpiece in the first to fifth forging processes composed of five sets of punches 26 and dies 23 . The vertical direction of the paper surface of FIG. 1 is the width direction of the multi-process forging machine 10, and the horizontal direction of the paper surface is the front-rear direction. In FIG. 1, the first to fifth forging steps are arranged in the width direction.

The frame 21 is a housing for arranging each part, and is made of iron and formed robustly. The five die holders 22 are arranged side by side in the width direction of the frame 21 . Five sets of dies 23 are replaceably attached to the rear side of each die holder 22 . A predetermined working die is formed on the rear side of each die 23 facing left in the figure.

The ram 24 is generally rectangular in plan view and reciprocates in the front-rear direction. Five punch holders 25 are provided side by side in the width direction on the front side of the ram 24 . Five punches 26 are replaceably attached to the front side of each punch holder 25 . A predetermined working die is formed on the front side of each punch 26 facing right in the figure. Each punch 26 reciprocates with ram 24 . In each heading process, the punch 26 and the die 23 are arranged facing each other.

The multi-process forging machine 10 includes a cutting process (not shown) upstream of the first forging process. The cutting process is provided with a movable cutter, a wire feeding mechanism, a pusher mechanism, and the like. The movable cutter is ring-shaped, and a long wire is inserted therein by the wire feeding mechanism. After that, the movable cutter operates in the radial direction of the long wire and cuts the long wire between itself and the fixed blade. As a result, a cylindrical workpiece having a predetermined size is produced. A pusher mechanism pushes the workpiece out of the movable cutter. Examples of the work material include aluminum, iron, and various alloys.

The transfer device 1 is arranged from above the die holder 22 to the front of the die 23 . The transfer device 1 has six pairs of fingers for gripping a work. The most upstream first finger grips the work in the cutting process and conveys it to the first forging process. The second to fifth fingers grip the work in the upstream forging process and convey it to the downstream forging process. The most downstream sixth finger grips the work in the fifth forging process and conveys it to the discharging process.

A drive 9 is provided for driving the ram 24 back and forth. The drive unit 9 is composed of a main drive source 91, various transmission mechanisms, cam mechanisms, and the like. The main drive source 91 can be, for example, an induction motor or a synchronous motor operating on a three-phase AC power supply. The drive unit 9 drives the transfer device 1 and the cutting process together. The driving force of the main drive source 91 is input to the crankshaft 95 that drives the ram 24 via the flywheel 92 , the disc brake 93 and the speed reduction mechanism 94 . Further, the driving force is branched and transmitted from the crankshaft 95 to the side shaft 97 via the pair of branched gears 96 .

The side shaft 97 branches and transmits the driving force upward. The driving force branched upward drives the transfer cam 98 to rotate. A transfer cam 98 drives the transfer device 1 . In addition, six open-close cams 9A are connected so as to be rotationally driven from the side shaft 97 via the transfer drive 99 . The open-close cams 9A are arranged at regular intervals in the width direction. The open/close cam 9A drives the fingers to open and close.

Further, the side shaft 97 is provided with a cutter cam 9B and is connected with a pusher cam 9C, a feed cam 9D, a feed roller 9E, and five knockout cams 9F. A cutter cam 9B, a pusher cam 9C, a feed cam 9D and a feed roller 9E drive the cutting process. The knockout cams 9F are arranged at equal intervals in the width direction and drive the knockout pins in the first to fifth forging processes.

Now, the detailed description of the transfer device 1 of the first embodiment will be described. FIG. 2 is a front view showing the configuration of the transfer device 1 of the first embodiment, showing a range corresponding to one process. FIG. 3 is a side view showing the configuration of the transfer device 1. As shown in FIG. The transfer device 1 rotates the work W by a predetermined rotation angle and conveys the work W, with at least one of the first to fifth forging processes as the downstream process P2.

In the first embodiment, the predetermined rotation angle is 90 degrees. Specifically, in the upstream process P<b>1 , the forming process is performed in a vertical posture in which the longitudinal direction of the work W coincides with the operation direction of the punch 26 . Then, in the downstream process P<b>2 , the forming process is performed with the workpiece W in a lateral posture in which the longitudinal direction of the work W is perpendicular to the operation direction of the punch 26 . In other words, the transfer device 1 rotates the work W from the vertical orientation to the horizontal orientation and conveys it.

The transfer device 1 includes a finger support section 3, a rotation support section 4, a swing drive section 5, a work rotation section 6, and the like. In FIG. 2, the finger support portion 3 and the rotation support portion 4 are driven to the downstream process P2. FIG. 2 shows the lateral posture of the work W in the downstream process P2. FIG. 3 shows the vertical posture of the work W in the upstream process P1. 4 is a plan view taken along the line DD in FIG. 3 and showing the structure of the work rotating section 6. As shown in FIG. In FIG. 4, the work W is schematically indicated by a triangle, and the change in posture is clarified.

As shown in FIGS. 2 and 4, the turning drive unit 5 is arranged between the upstream process P1 and the downstream process P2. A body portion 50 of the turning drive portion 5 is formed to be elongated in the vertical direction. The body portion 50 is rotatably supported by the frame 21 by two pairs of upper and lower bearing portions 51 and 52 . A sector gear 53 is provided on the side surface between the bearing portions 51 and 52 of the body portion 50 , slightly more than half the circumference.

A rack gear 54 is provided so as to mesh with the sector gear 53 . The rack gear 54 is driven to reciprocate in the front and back directions of the paper surface of FIG. 3 by the transfer cam 98 described above. As a result, the turning drive unit 5 is driven to rotate 180° around the rotating shaft extending in the vertical direction. A mounting seat 55 is provided on the side surface of the body portion 50 in the opposite direction to the sector gear 53 . The rotation support portion 4 is fixedly attached to the attachment seat 55 .

The rotation support portion 4 is formed in a cylindrical shape extending vertically. A finger support 3 is arranged inside the rotation support 4 . The finger support portion 3 is composed of a support rod 31, a pair of fingers 32, and the like. The support rod 31 is rotatably fitted inside the rotation support portion 4 . A pair of fingers 32 are provided at the bottom of the support rod 31 .

The pair of fingers 32 are formed as a closed type that maintains a closed state. More specifically, the pair of fingers 32 are provided on the support rod 31 such that the distance between them is variable while being spaced upward and downward. The workpiece W is ejected from the die 23 by a knockout pin (not shown) and pushed between the fingers 32 . Also, the work W is pushed out from between the fingers 32 by the punch 26 .

The revolving drive unit 5 causes the rotation support unit 4 to revolve between the upstream process P1 and the downstream process P2 by rotating 180 degrees. The rotation support part 4 and the finger support part 3 reciprocate between the upstream process P1 and the downstream process P2 by drawing arcuate trajectories M1 and M2 shown in FIG. 3, the finger support part 3 and the rotation support part 4 are shown in a state in which they have moved between the upstream process P1 and the downstream process P2, and only the finger 32 is shown in a rotating state in the upstream process P1. It is

The work rotating portion 6 is composed of a link member 61, a link support seat 65, and the like. Link member 61 extends from finger support 3 . More specifically, a link fixing member 34 is fixedly attached around the support rod 31 of the finger support 3 . A fixing hole 35 is formed at one location on the rear side of the link fixing member 34 .

The link member 61 is a rod-shaped member with a circular cross section. A shallow fixing groove 63 is carved on the side surface of the link member 61 near one end 62 . One end 62 of the link member 61 is inserted into the fixing hole 35 of the link fixing member 34 . Furthermore, the fall prevention screw 36 is screwed into the link fixing member 34 and enters the inside of the fixing groove 63 . This prevents the link member 61 from loosening or coming off. The link member 61 extends horizontally rearward from the link fixing member 34 .

The link support seat 65 is provided at a position equidistant from the upstream process P1 and the downstream process P2 (see FIG. 4) and at a lower front position (see FIG. 3) of the turning drive unit 5. As shown in FIG. A specific position of the link support seat 65 is set to a position at which the work W, which will be described later, is rotated by 90°. As shown in FIG. 3, the link support seat 65 is rotatably supported under the frame 21 using a bearing portion 66 . A support hole 67 is formed in the link support seat 65 . The inner diameter of the support hole 67 is slightly larger than the outer diameter of the link member 61 . The link member 61 passes through the support hole 67 and is movable forward and backward with respect to the support hole 67 .

As indicated by the dashed line in FIG. 4 , when the finger support portion 3 is positioned at the upstream process P1, the longitudinal direction of the link member 61 is inclined at 45° with respect to the front surface DF of the die 23 . The rotation angle of the finger support portion 3 is defined by the orientation of the link member 61, and the workpiece W is controlled to have a vertical orientation. Further, as indicated by the solid line in FIG. 4, when the finger support portion 3 is positioned at the downstream process P2, the direction of the link member 61 is inclined by 135° with respect to the front face DF of the die. Rotate 90° from Therefore, the finger support part 3 also rotates by 90 degrees, and the work W is controlled to a horizontal posture rotated by 90 degrees from the vertical posture.

A finger driving portion 7 is provided above the turning driving portion 5 . The finger drive unit 7 is for opening and closing an open/close type finger 82 (see FIG. 5), which will be described later, and is not used for the closed type finger 32 . The finger drive portion 7 is composed of a drive lever 71, a grip lever 72, and the like. The drive lever 71 pivots with its lengthwise central portion 711 supported by the frame 21 . One end 712 of the drive lever 71 is driven upward by the aforementioned open/close cam 9A. At this time, the other end 713 of the drive lever 71 drives the grip lever 72 downward.

Next, the operation and action of the transfer device 1 of the embodiment will be described. When the forming process in the upstream process P1 is completed, the vertically oriented work W is ejected from the die 23 . The fingers 32 grip this work W. As shown in FIG. Next, the turning motion by the rotation of the turning driving portion 5 and the revolution of the rotation supporting portion 4 start.

When the rotation drive unit 5 rotates from 0° to 90°, the rotation support unit 4 revolves 90° while drawing an arc-shaped trajectory M1 centered on the rotation drive unit 5, and the upstream process P1 and the downstream process P1 are performed. The middle of P2 is reached. At this time, the link member 61 of the work rotating portion 6 swings 45° around the link support seat 65 and retreats with respect to the link support seat 65 . Further, as the link member 61 swings by 45°, the finger support portion 3 rotates by 45°, and the finger 32 and the work W rotate by 45°.

Further, when the rotation drive unit 5 rotates from 90° to 180°, the rotation support unit 4 revolves 90° while drawing an arc-shaped trajectory M2 centering on the rotation drive unit 5, and reaches the downstream process P2. do. At this time, the link member 61 swings further by 45° around the link support seat 65 and moves forward with respect to the link support seat 65 . In addition, as the link member 61 swings by 45°, the finger support portion 3 rotates by an additional 45°, and the finger 32 and the work W rotate by an additional 45°.

As a result, the 180° turning motion of the turning drive unit 5 rotates the work W by 90° and conveys it to the downstream process P2 in a horizontal posture. As a result, in the downstream process P2, the workpiece W can be formed laterally. By changing the mounting angle of the fingers 32, the transfer device 1 can grip the work W in the horizontal posture in the upstream process P1 and transfer it to the downstream process P2 in the vertical posture rotated by 90°. Furthermore, the transfer device 1 can rotate the work W by 90° and transfer it in a plurality of processes.

In the transfer device 1 of the embodiment, the rotation support portion 4 that rotatably supports the finger support portion 3 draws arc-shaped trajectories M1 and M2 from the upstream process P1 to the downstream process P2 by the rotation drive section 5. be transported. During this transfer, the rotation angle of the finger support part 3 is controlled by the work rotation part 6, and rotates by a predetermined rotation angle. Therefore, the finger 32 and the work W also rotate by the same rotation angle. Therefore, the transfer apparatus 1 can rotate the work W conveyed from the upstream process P1 to the downstream process P2 by a predetermined rotation angle in a rotary movement type apparatus configuration.

Next, the transfer device 1A of the second embodiment will be described, mainly focusing on the differences from the first embodiment. In the transfer device 1A of the second embodiment, the fifth forging process is the upstream process, and the discharge process 85 is the downstream process. Also, in the second embodiment, the configuration of the finger support portion 8 is different from that in the first embodiment. FIG. 5 is a side view showing the configuration of the transfer device 1A of the second embodiment.

In the second embodiment, the configurations of the turning drive section 5, the rotation support section 4, and the work rotation section 6 are the same as in the first embodiment. Further, in the second embodiment, the finger drive section 7 described above is used. The finger support portion 8 of the second embodiment includes a support cylinder 81, a pair of fingers 82, an operation shaft 83 corresponding to an operation member, and the like. The support tube 81 is fitted inside the rotation support portion 4 so as to be rotatable. A pair of fingers 82 are provided at the bottom of the support tube 81 .

The pair of fingers 82 are formed in an opening/closing type that performs opening/closing operation. More specifically, the pair of fingers 82 are arranged on the left and right so as to intersect and are supported so as to be able to open and close. The operating shaft 83 is provided inside the support cylinder 81 so as to be vertically movable. The operating shaft 83 opens the fingers 82 when driven downward by the grip lever 72 of the finger driving portion 7 . The operating shaft 83 is biased upward by a biasing spring (not shown). Therefore, the pair of fingers 82 are always urged in the closing direction, and the workpiece W is not accidentally released.

FIG. 6 is a diagram showing a configuration example of the discharge process 85 and explaining the action of the transfer device 1A of the second embodiment. A discharge step 85 is arranged downstream of the fifth heading step. The discharge process 85 is configured using a discharge conveyor 86 and a conveyor driving unit (not shown). The discharge conveyor 86 is formed of an annular conveyor belt on which the workpiece W is placed, and is arranged so as to reciprocate on the conveying path.

The conveyor drive drives the discharge conveyor 86 in a rotary motion. The discharge conveyor 86 conveys the work W by rotating at a constant speed. Alternatively, the discharge conveyor 86 rotates intermittently in synchronization with the reciprocating motion of the ram 24 to convey the work W. As a result, the work W is discharged outside the multi-process forging machine 10 and conveyed to the inspection machine 87 on the downstream side.

In the second embodiment, the work rotating section 6 rotates the work W from the vertical orientation to the horizontal orientation. As shown in FIG. 6, the works W are placed on the discharge conveyor 86 so as to be aligned in the longitudinal direction and discharged. Therefore, in the inspection machine 87, the workpiece W is automatically carried in, resulting in a significant labor-saving effect. Furthermore, since the longitudinal direction of the work W and the conveying direction of the discharge conveyor 86 match, the work W does not roll and collide with each other. Therefore, no collision mark is generated on the workpiece W.

In addition, in the first and second embodiments, by changing the position of the link support seat 65 in the front-rear direction, the rotation angle of the workpiece W can be changed to other than 90°. Also, the position of the link support seat 65 does not necessarily have to be equidistant from the upstream process P1 and the downstream process P2.

Also, the first embodiment and the second embodiment can be used together. Further, in the transfer device (1, 1A), two types of finger support portions 3 and finger support portions 8 can be exchanged. In addition, the transfer device (1, 1A) can include a conventional configuration in which the workpiece W is conveyed without being rotated by removing the workpiece rotating section 6, or rotated by 180°. be. Therefore, various transfer methods for the work W can be realized in one transfer device (1, 1A).

Also, the workpiece W may be gripped using three or more fingers (32, 82). Furthermore, in the second embodiment, the transport destination of the work W in the discharge process 85 can be changed to a device other than the inspection machine 87, such as a shipping device that packs the work W or an assembly line that uses the work W. Also in the modified mode, the effect of saving labor and the effect of not generating collision marks are similarly generated. Various other modifications and applications are possible for the present invention.

Reference Signs List 1, 1A: Transfer device 21: Frame 3: Finger support part 31: Support rod 32: Finger 4: Rotation support part 5: Rotation drive part 53: Sector gear 54: Rack gear 6: Work rotation part 61: Link member 65: Link support Seat 7: Finger drive part 8: Finger support part 81: Support tube 82: Finger 83: Operation shaft 85: Discharge process 86: Discharge conveyor 10: Multi-process forging machine W: Work P1: Upstream process P2: Downstream process

Claims (7)

a finger support for supporting a finger that grips a workpiece in an upstream process and releases the workpiece in a downstream process;
a rotation support portion that rotatably supports the finger support portion;
a turning drive unit that revolves the rotation support unit between the upstream process and the downstream process;
a link member extending from the finger support portion; and a link support seat that is rotatably provided at a position equidistant from the upstream process and the downstream process and supports the link member; a workpiece rotating portion that rotates the finger support portion by a predetermined rotation angle as it revolves;
A transfer device comprising: 2. The transfer device of claim 1, wherein said rotation angle is 90[deg.]. 3. A transfer device according to claim 1 or 2, provided in a multi-process forging machine comprising a plurality of forging processes each having a die mounted on a frame and a punch reciprocatingly opposed to the die. A transfer device in which any of the heading processes is the downstream process,
The finger support has a plurality of fingers for gripping the workpiece and a biasing member for biasing the plurality of fingers in a direction to approach each other.
4. A transfer device according to claim 3. The work rotating section rotates the work between a vertical posture in which the longitudinal direction of the work coincides with the direction of motion of the punch and a lateral posture in which the longitudinal direction of the work is orthogonal to the direction of motion of the punch. 5. The transfer device of claim 4, allowing A transfer device in which the most downstream forging process is the upstream process, and a discharge process for discharging the work is the downstream process,
The finger support portion has a plurality of fingers for gripping the workpiece and an operation member for opening and closing the plurality of fingers,
4. A transfer device according to claim 3. The work rotating unit rotates the work from a vertical posture in which the longitudinal direction of the work coincides with the operation direction of the punch to a horizontal posture in which the longitudinal direction of the work is orthogonal to the operation direction of the punch,
The discharge step includes a discharge conveyor that discharges the works in a direction perpendicular to the direction of movement of the punch, and aligns a plurality of the works in a line in the longitudinal direction and discharges them.
7. A transfer device according to claim 6.

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