JPS62238032A - Set-up change device for transfer press - Google Patents

Abstract

PURPOSE:To reduce the time and labor at the die changing time by composing a work transfer means by linking a work holding means and cross bar and by arranging the cross bar moving means for the rearrangement and a clamping means. CONSTITUTION:A pair of feed bars 3a, 3b are provided in parallel at both sides of a press line 1 and the cross bars in the number corresponding to the number of dies are arranged as well and made freely attachably and detachably to the feed bars 3a, 3b via cross bar clamping means 5a, 5b. The work holding means 6 performing a vacuum suction is provided on the cross bar 4, which moves a gripping position B and releasing position G from a stand by position A via paths P1, P2 respectively for dies M1, M2 and moves to a changing position D via paths P3, P4 at the die changing time. In this way, the time and labor in changing dies can be reduced together with the automation in the set-up change.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a setup change device in a transfer press.

(Prior art) In a transfer press, a plurality of molds are arranged in a press line at a predetermined interval along the workpiece conveyance direction, and as a means for conveying the workpieces from one mold to another. , a pair of feed bars that are arranged along the workpiece conveyance direction on both sides of the press line to perform two-dimensional or three-dimensional movement, and a suction cup attached to the feed bar and equipped with a suction cup at the tip for sucking the workpiece. It is usually equipped with workpiece holding means called fingers.

The above-mentioned fingers need to be replaced with fingers suitable for holding the workpiece processed by the mold each time the press line is changed, that is, the mold is replaced. The worker manually removes the fingers from the feed bar, and then, after the replaced mold is brought into the press line, the worker manually removes the fingers according to the work to be pressed with the new mold. The task of attaching it to the feed bar was repeated. By the way, a large number of these fingers are provided on both sides of the press line corresponding to the number of dies in the press line, so it takes a long time to change the dies (this not only reduces productivity but also makes it difficult to replace the dies). There was a problem that the work was hard work for the workers.

Furthermore, when conveying a workpiece using the fingers, it is often necessary to rotate the fingers in order to tilt the workpiece and make it easier to place the workpiece on the lower die. When the feed bars on both sides are provided separately, there is also the inconvenience that the fingers disposed facing each other on both sides of the press line must be rotated in synchronization with each other.

(Object of the invention) Therefore, the present invention was made in view of the above circumstances, and
It is an object of the present invention to provide a setup change device that automates the work of replacing the workpiece conveyance means that accompanies the setup change of a transfer press, and that facilitates changing the posture of the workpiece when conveying the workpiece.

(Structure of the Invention) The present invention includes a workpiece holding means for holding and transporting the workpiece, and a crossbar connected at both ends to feed bars so that it can stand by at a standby position between molds during press processing. In addition, a crossbar mounting means provided on the upper surface of the mold for placing the crossbar on the mold during a setup change, and a crossbar mounting means for placing the crossbar on the mold during a setup change. a crossbar moving means capable of moving the crossbar from the crossbar mounting means to the standby position; and a crossbar moving means capable of moving the crossbar from the crossbar mounting means to the standby position; The present invention is characterized in that it includes a crossbar clamping means provided on the feed bar so as to be able to clamp and disconnect the connection between the crossbar and the feed bar.

(Effects of the Invention) With the above configuration, the workpiece holding means can be completely automatically replaced during setup changes without requiring the operator's intervention, which reduces the time and work required for mold replacement. This has the effect of significantly reducing the amount of labor required by the person.

Further, since the crossbar is placed on the upper surface of the mold, there is an advantage that it can be applied to a press line system having a configuration in which the crossbar cannot be placed between the molds.

Further, since the workpiece holding means is provided on the crossbar connecting the pair of feed bars, the posture of the workpiece can be easily changed by rotating the crossbar during conveyance of the workpiece.

(Example) An example of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a schematic plan view of a transfer press equipped with a changeover device according to the present invention, in which a workpiece (not shown) is
The required molds (not shown) are placed in the press line 1, which carries out press processing by sequentially conveying from the left to the right in the figure.
A plurality of bolsters 2 are arranged at predetermined intervals along the workpiece transport direction. On both sides of the press line 1, a pair of feed bars 3a and 3b are arranged to extend parallel to each other along the workpiece conveyance direction.

Between the feed bars 3a and 3b, cross bars 4 of a number corresponding to the number of dies arranged in the press line 1 are arranged at equal intervals with a pitch equal to the arrangement pitch of the dies, and at crossbars 4 to be described later. A workpiece holding means 6 is attached to the crossbar 4, which is removably connected to the spark lamp means 5a and 5b, for vacuum suctioning and conveying the workpiece. Note that FIG. 1 shows a state in which the cross bars 4 are located above each mold, and during press working, these cross bars 4 are arranged to stand by at a standby position between each mold.

FIG. 2 is a side view schematically illustrating the movement path of the cross bar 4 that moves with the operation of the feed bars 3a and 3b. The 0 position A of the second mold M8, where the upper mold is placed on the lower mold so that it can be replaced when replacing the mold, is the position between the first mold M1 and the second mold M2. This is the standby position of the crossbar 4 in between. First, the movement path of the crossbar 4 during workpiece transport will be explained. The crossbar 4 moves from the standby position A along the path P in the opposite direction of workpiece transport and reaches the workpiece gripping position B (approach).
At this position B, the workpiece W placed on the lower mold of the first mold M1 is grabbed.Then, the crossbar 4 moves upward along the path PI and then moves toward the second mold M2 in the workpiece transport direction. The workpiece W is moved to the top of the second mold Mt and reaches the workpiece release position C (Advanced), and the workpiece W is placed on the lower mold of the second mold M2 to release the workpiece W.

Next, only the cross bar 4 returns to the standby position along the path P, and press working is performed with the cross bar 4 in the standby position 1jA, and the workpiece conveyance operation of the loss bar 4 is performed as described above. repeated.

Next, when changing the setup of the press line, the cross bar 4 is replaced together with the molds, but at this time, as mentioned above, the upper molds of the molds M+ and Mt are placed on their lower molds, and the second mold is replaced. The outline is shown by virtual lines in the figure. in this case,
The crossbar 4 moves along the path P4. That is, first, the molds M+ and Mz rise vertically from the standby position fiA to a height above the upper surface of Mz, and then move horizontally in the workpiece conveyance direction or in the counter-workpiece conveyance direction (counter-workpiece conveyance direction in FIG. 2). The upper surface of the molds MI and Mz has a groove 7 for storing the cross bar 4 and a positioning groove 7 for fixing the cross bar 4 as described later. A crossbar mounting means consisting of a pin is provided, and the crossbar 4 is lowered from its position and placed on the crossbar mounting position E+ on the mold M+. Zero-order crossbar clamping means 5a, 5b is activated,
Unclamp both ends of the crossbar 4. This breaks the connection between the feed bars 3a, 3b and the cross bar 4, and the mold M1 is carried out of the press line 1 with the cross bar 4 placed thereon. Then, a new mold is carried into the position where this mold M1 existed, and on the upper surface of this new mold is a workpiece holding means 6 suitable for holding the workpiece to be press-formed with this mold. A crossbar 4 with a crossbar 4 is placed in advance. When a new mold is carried into the position where the mold M existed, the feed bars 3a and 3b are activated and the clamping means 5a and 5b thereof are moved to the position E, and are at the position E. Clamp the new Losspar 4. Then, this crossbar 4 moves along the path P4 in the opposite direction to the above-described direction through position to, reaches the standby position A, and waits at that position.

3 and 4 are a side view and a plan view of a feed bar drive device for moving the cross bar 4 along the path shown in FIG. 2. The feed bars 3a, 3b are horizontally slidable on the lift carrier 10. A feed carrier 12 having a vertically extending groove 11 is fixed to the ends of the feed bars 3a, 3b.

13 is a camshaft rotated by a motor (not shown), and this camshaft 13 has a large diameter cam 14 for moving the feed bars 3a, 3b in the horizontal direction, and a cam 14 for moving the feed bars 3a, 3b in the horizontal direction. A small-diameter cam 15 is attached to allow the cam to rotate.

Reference numeral 16 denotes a bar conveyance drive arm which is equipped with a cam follower 17 that engages with the large diameter cam 14 and is pivotally connected to a shaft 18.The tip of this arm 16 engages with the groove 11 of the feed carrier 12 via a roller 19. ing.

Further, a bar vertical drive arm 21 pivotally connected to a shaft 20 is engaged with the small diameter cam 15 via a cam follower 22 attached to this arm 21.

The bar vertical drive arm 21 includes a feed bar 3a.

A rack 23 provided horizontally extending parallel to 3b.
One end is pivoted. Reference numeral 24 denotes a pinion shaft extending horizontally and perpendicular to the rack 23, and a pinion 25 that engages with the rack 23 is fixed to this pinion shaft 24. Moreover, one pinion 26 is further fixed to the pinion shaft 25, and a rack 27 hanging down from the lift carrier 10 is engaged with this pinion 26. Therefore, when the bar vertical drive arm 21 is swung by the rotation of the cam 15 and the rack 23 is moved in the horizontal direction, this movement is transmitted to the pinion 26 via the pinion 25 and pinion shaft 24, which causes the rack 27 to move up and down. The feed bars 3a and 3b move up and down in this direction. Further, on the base plate 28 through which the rack 27 can pass in the vertical direction, there is a pair of cylinders 29 that support the lift carrier 10.
．． 29 is provided, and when replacing the crossbar 4,
The feed bar 33.3b is raised by the cylinder 29.29 above the raised position by the cam 15 during transport of the workpiece, thereby allowing the cross bar 4 to reach the upper surface of the mold. In addition, the feed bars 3a and 3b raised by the cylinders 29 and 29 are held at an intermediate height position, making it possible to clamp and unclamp the cross bar 4 placed at the mounting position on the mold. In order to do this, a stopper 30 is provided on the upper surface of the fixed plate 28. As shown in FIG. 5, this stopper 30 is made of a plate-shaped body slidably provided on the upper surface of the plywood 28.
When the cross bar 4 is replaced, it is slid by the air cylinder 31 to receive the lower end surface 27a of the rack 27, thereby maintaining the feed bars 3a, 3b at a desired intermediate height position.

The intermediate position of the feed bars 3a, 3b corresponds to the positions E and E2 of the cross bar 4 in FIG. In addition, when the feed bars 3a and 3b rise,
As shown in phantom in FIG. 3, the feed bar transport drive arm 16 is spaced apart from the cam 14.

With the above configuration, the feed bars 3a, 3b are controlled so that the cross bar 4 connected thereto moves along the movement path as shown in FIG.

Next, referring to FIGS. 6 and 7, the crossbar 4 placed on the crossbar mounting means provided on the mold M, and the crossbar provided on one feed bar 3a.
A front view and a plan view showing the configuration of the clamping means 5a are shown. FIG. 8 is a front view of the crossbar clamp means 5b provided on the other feed bar 3b, showing a state in which the crossbar 4 is clamped.

9 is a sectional view taken along the line IX-IX in FIG. 7.

As is clear from these FIGS. 6 to 9, the cross bar 4 is a hollow cylindrical body with a square cross-sectional shape, and a positioning pin is provided on the bottom surface of the cross bar 4 to protrude into the groove 7 on the top surface of the mold M. 3
3 is provided with two holes 34 into which the holes 34 are inserted. As is clear from FIG. 9, the positioning pin 33 is attached to the mold M.
two bolts 35.35 and the coil springs 3 fitted into these bolts 35.35 respectively.
It is fixed on a support plate 37 elastically provided by 6 and has a flange 33a for receiving the crossbar 4.

On the other hand, clamping means 5a provided on the feed bar 3a
As is clear from FIGS. 6 and 7, a shaft 38 is rotatably supported by the feed bar 3a and extends horizontally, and a cylinder 39 is coaxially attached to the tip of the shaft 38. A connecting member 41 is attached to the tip of the piston shaft 40 of this cylinder 39 perpendicularly thereto, and a connecting member 41 is attached at both sides of the piston shaft 40 and the tip thereof is attached to the connecting member 41.
A pair of positioning pins 42 and 42 protrude from the side surface of the cross bar 1 toward the cross bar 4 side. These positioning pins 42.42 protrude long from the side surface of the connecting member 41 on the feed bar 3a side and are inserted into the cylindrical guide member 43, respectively.
is configured to slide within the guide member 43 as the piston shaft 40 moves back and forth. Furthermore, a connecting member 44 having a shape corresponding to the connecting member 41 is attached to the cross spar 4 side. This connecting member 44 is
Hole 45.45 into which the positioning pin 42.42 is inserted
It is equipped with Furthermore, both connecting members 41, 44 have air connectors 46 built in, and when the cylinder 39 is actuated, the side surfaces of both connecting members 41, 44 come into close contact on the connecting surface 47, and one end of the cross bar 4 is connected to the feed bar. 3a, a vacuum passage for sucking a workpiece is formed which communicates with the side members 41 and 44.

Further, a feed bar 3a is attached to the shaft 38 of the clamping means 5a.
A sector gear 48 is attached thereto, and a gear portion of the sector gear 48 projects outward from the upper surface of the feed bar 3a and is engaged with a rack 49. When transporting the workpiece, this rack 49 is used as a cylinder (not shown).
When operated, the shaft 38 rotates to change the angle of the crossbar 4, thereby maintaining the posture of the work being transported in a desired inclined state.

Furthermore, as shown in FIG. 8, the crossbar clamping means 5b on the other feed bar 3b side includes a cylinder 50 whose one end is fixed to the side surface of the feed bar 3b and extends toward the cross bar 4; piston shaft 51
It consists of an engaging pin 53 rotatably provided coaxially with the axis of the piston shaft 51 within a member 52 fixed to the tip end of the piston shaft 51 . The engagement pin 53 is provided with a flange 53a, and when the engagement pin 53 is inserted into the hole 55 of the connection member 54 provided at the end of the cross bar 4 by the operation of the cylinder 50, the connection member 54 is inserted. The side surface of the flange 53a and the side surface of the flange 53a come into close contact with each other on the coupling surface 56, so that the cross bar 4 is clamped.

In this case, since the engagement pin 53 is rotatably provided within the member 52 as described above, the feed bar 3a
Rotation of the cross bar 4 by the side clamping means 5a is allowed.

The structure and operation of one embodiment of the transfer press according to the present invention have been clarified through the above explanation.
A crossbar 4 connected between a and 3b moves from a standby position to a crossbar mounting means including positioning pins 33 and 33 provided on the top surface of the mold M and is placed there. When the cylinder 39.50 is operated at that position, the cross bar 4 is unclamped or clamped, and the connection between the cross bar 4 and the feed bar 3as3b is interrupted. This has the advantage that the crossbar 4 can be replaced automatically in the process, and therefore the time and labor required for replacing the mold can be reduced.

Further, since the workpiece holding means is attached to the crossbar 4, there is an effect that the transporting posture of the workpiece can be easily changed by rotating the crossbar 4 during transporting the workpiece.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a schematic plan view of a transfer press equipped with a changeover device according to the present invention, FIG. 2 is a side view illustrating the movement path of the crossbar, and FIG. 4 is a side view and a plan view of the feed bar driving device, FIG. 5 is a side view showing a stopper portion for keeping the feed bar in a predetermined position, and FIGS. 6 and 7 are
The figure is in the open position on the mold! 3! FIG. 8 is a front view and a plan view, partially in section, showing the structure of a clamping means for clamping one end of the crossbar placed on the crossbar; FIG. 8 is a front view, partially in section, showing the structure of the clamping means for clamping the other end of the crossbar; , FIG. 9 is a sectional view taken along line IX-IX in FIG. 6. 1--Press line 2--Bolster 3a, 3
b...Feed bar 4...Cross bar 5a, 5b...-Cross bar clamping means 6--Work holding means 7--Groove on top of mold 10--Lift carrier 12--Feed carrier 13- -Cam shaft 14.15-・Cam 16-・
- Bar transport drive arm 21 - Bar vertical drive arm 23.27 - Rack 24... Pinion shaft 25
．． 26- Pinion 29...- Cylinder 30... Stopper 33-... Positioning pin 39.50...
-Cylinder 41.44 connection member

Claims (1)

[Claims] A plurality of molds are arranged in a press line at predetermined intervals along the workpiece transport direction, and are arranged on both sides of the press line so as to extend parallel to each other along the workpiece transport direction. A workpiece conveyance means including a pair of feed bars installed allows
In a transfer press that performs press working by sequentially conveying workpieces, the workpiece conveying means has a workpiece holding means capable of holding and conveying the workpieces, and is capable of waiting at a standby position between molds during press working. The feed bar is configured to include a cross bar whose both ends are connected to the feed bar, and a cross bar mounting provided on the upper surface of the mold in order to place the cross bar on the mold during setup change. crossbar moving means capable of moving the crossbar from the standby position to above the crossbar mounting means and from above the crossbar mounting means to the standby position during the setup change; provided on each of the pair of feed bars so as to unclamp and clamp both ends of the cross bar placed on the cross bar mounting means to disconnect and disconnect the cross bar and the feed bar. A changeover device for a transfer press, characterized in that it is equipped with crossbar clamp means.