JPH01157733A - Material transfer device for press machine - Google Patents

Abstract

PURPOSE:To eliminate the need for a three dimensional feeding mechanism in feeding a work and to miniaturize the title device by linking a feed bar by pivotally fitting the parallelogram link turnable in the orthogonal direction with a work feeding direction to a slide and fitting the finger for the work support thereto. CONSTITUTION:Two parallel links 44, 45 are pivotally fitted in a parallelogram shape so as to be turnable in the orthogonal direction with a work feeding direction before and behind of the right and left both sides of a slide 41 having an upper die. The feed bars 49, 49 of the right and left movable in the orthogonal direction with the work feeding direction are then linked to the links 49, 49. The finger 59 for supporting a work made to be able to reciprocate in parallel to the work feeding direction are fitted to the feed bars 49, 49, which are pulled by pushing to the slide 41 via the link by the lift of the slide 41, moved in the direction apart from a press line center or in the approaching direction and the work is mounted onto a lower die with its descent or ascended from the lower die and is fed to the succeeding position by the movement into the work feeding direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an inexpensive material conveying device for a press machine that has a simple structure and does not require large amounts of power.

[Prior Art] Fig. 6 shows an example of a conventional transfer press, in which power taken out from a press drive device 1 provided at the top via a transmission shaft 2 is transmitted to a drive shaft 3. Tilt bar 6 via cam 4 and link 5 provided on shaft 3
By tilting the feed bar 7, the feed bar 7 is operated to feed C and return r, thereby transporting the workpiece 8.

In addition, a cam 9 fitted to one end of the drive shaft 3 is provided, and an input shaft 11 supported on the bed is reciprocated via a mechanical interlocking mechanism 10, and a required interval position on the input shaft 11 is moved. Rotational force is transmitted to a plurality of shafts 14 by a rack 12 and a pinion 13 provided in
The bevel gears 15 and 16 transmit rotational force to the spline shaft 17, and the binion 18 and idle pinion 19 engaged with the spline shaft 17 raise and lower the feed bar lifting platform 2■ via the lifting rack 20, and the feed bar 7 The workpiece 8 held between the provided fingers 22 is raised (b) and lowered (d).

A cam 23 fitted to the other end of the drive shaft 3 is provided, and an input shaft 25 supported on the bed is reciprocated via a mechanical interlocking mechanism 24 to a position at a required interval on the input shaft 25. Rotational force is transmitted to a plurality of shafts 28 by the provided rack 26 and pinion 27. The shaft 28 receiving the rotational force is rotated by the pinion 29 and the rack 30 to the rack shaft 8.
1, the rack shaft 34 receives the thrust through the rack 32 on the shaft 31, the synchronized pinion 33, and the rack 32 on the rack shaft 84, and the rack shaft 34 receives the thrust through the feed bar support 35 connected to the rack shaft 31. The feed bar 7 is laterally moved toward and away from the workpiece 8 to grip the workpiece 8 (a) and release the workpiece (e). At this time, the elevating rack 20 is configured to move laterally together with the pinion 18 as the pinion 18 moves in the axial direction along the spline shaft 17. With the power from the press drive device 1, the feed bar 7 performs the operations of gripping a1 raising b1 feeding C1 lowering d1 opening e1 returning r.

[Problems to be Solved by the Invention] However, in the above-described transfer press, each operation of gripping the workpiece 8 (a1, raising, b1, feeding C1, lowering, d1, opening, e1, returning r) is performed by operating the feed bar 7, which has a large weight. Since power is required and a large number of cams and gears are used as means for driving the feed bar 7, there are problems in that the device becomes large in size, has a complicated structure, and is expensive.

The present invention has been made in view of the above-mentioned circumstances, with the object of providing a material conveying device for a press machine that is simple in structure and inexpensive and does not require large amounts of power.

[Means for Solving the Problems] The present invention provides a press machine that includes a lower mold and an upper mold attached to a slide that can move up and down, and is capable of press-molding a workpiece using the upper and lower molds. , a parallelogram link rotatable in a direction perpendicular to the workpiece feeding direction is pivotally mounted, and a feed bar movable in the direction perpendicular to the workpiece feeding direction along a guide surface is connected to the link. , the feed bar is provided with a workpiece supporting finger that is capable of reciprocating in a direction parallel to the workpiece feeding direction.

[Operation] As the slide descends and rises, the feed bar is pushed and pulled by the slide via the link, moving away from the center of the press line or moving closer to the press line, thereby causing the workpiece to The workpiece descends and is placed on the lower mold from the fingers, or rises from the lower mold while being supported by the fingers, and the workpiece is sent to the next position by movement of the fingers in the workpiece feeding direction.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 to 4 ■X0) (A> is an embodiment of the present invention.

Brackets 48 are fixed to the front and rear of both the left and right measuring parts of a slide 41 equipped with an upper mold 42 that can be raised and lowered by an appropriate press drive device, and two parallel links 44. 45 is pivotally connected in a parallelogram link shape via pins 48 and 47 so as to be rotatable in a direction perpendicular to the feeding direction of the workpiece 48, and two hollow holes on the left and right extend in the feeding direction of the workpiece 48. A bracket 50 is fixed to the front and rear of the feed bar 49, and the links 44 and 45 are pivotally connected to the bracket 50 via pins 51 and 52. A guide wheel 54 is attached that can move the workpiece 48 in a direction perpendicular to the feeding direction of the workpiece 48.

A deceleration motor 55 with a brake is disposed on the front end side or the rear end side of the feed bar 49, and a sprocket 5B located in the hollow part of the feed bar 49 is fixed to the output shaft of the deceleration motor 55. A sprocket 57 is rotatably arranged in a hollow part at the rear end or a hollow part at the front end, and an endless chain 58 extending parallel to the feeding direction of the workpiece 48 is passed between the sprockets 58 and 57, and the chain 58 is connected in the longitudinal direction. A plurality of fingers 59 are fixed at required intervals.

In addition, in the figure, 60 is a spring installed between the slide 41 and the link 44 to pull the link 44.45 toward the center of the press line, and 61.62 is a spring attached to the slide 41 to restrict the position of the link 44.45 toward the center of the press line. and a stopper fixed to the link 44, 63 is a bolster, and 64 is a lower mold attached to the bolster 63.

Immediately after the slide 41 is lowered and the workpiece 48 is press-formed, as shown in FIG.
49 is pushed outward from the center of the press line by the slide 41 via links 44 and 45, and is located on the outer end side of the guide surface 53.

Since the spring 60 is pulling the link 44, when the slide 41 starts to rise, the feed bar 49 moves toward the center of the press line along the guide surface 53 as shown in FIG. 61.82 move until they collide, and the fingers 59 engage with the side ends of the work 48. Therefore, when the slide 41 further rises, the workpiece 48 is supported by the fingers 59 and moves away from the lower die 64, as shown in FIG. 4, 1/L>, and rises together with the feed bar 49.

When the workpiece 48 is separated from the lower mold 64, the deceleration motor 55 is driven to rotate the sprocket 56, the chain 58 is rotated, the finger 59 is moved by one pitch in the workpiece 48 feeding direction, and the deceleration motor 55 is stopped. let As a result, the workpiece 48 reaches the lower part of the next upper mold 42.

When the workpiece 48 moves by one pitch, the slide 41
begins to decline. Therefore, the work 48 supported by the fingers 59 also descends and is placed on the lower mold 64, and at the same time the guide ring 54 of the feed bar 49 also comes into contact with the guide surface 53. Therefore, if the slide 41 is further lowered, the feed bar 49 is pushed by the links 44, 45 and the guide surface 53
The finger 59 moves away from the center of the press line, and the finger 59 separates from the workpiece 48.

When the finger 59 is detached from the workpiece 48, the deceleration motor 55 is reversed to rotate the chain 58 in the opposite direction.
Return finger 59 to its original position. Therefore, slide 4
1 is lowered to the lower limit position, the workpiece 48 is press-formed by the upper and lower molds 42 and 64 as shown in FIG.

FIG. 5 shows another example of the workpiece feeding mechanism used in the present invention.
In the embodiment described above, a chain and a sprocket are used to send the workpiece 48, whereas in this embodiment, a hydraulic cylinder 65 is used to send the workpiece 48. In the figure, reference numeral 66 denotes an arm to which a plurality of fingers 59 are fixed and can be reciprocated in a direction parallel to the feeding direction of the workpiece 48 by a fluid pressure cylinder 65.
is housed within the feed bar 49. When sending the workpiece 48, the fluid pressure cylinder 65 is operated. Further, the fluid pressure cylinder 65 may not be common to all fingers 59, but one fluid pressure cylinder may be provided for two fingers 59.

In addition, in the embodiments of the present invention, the case where the workpiece is fed by a chain and sprocket or a hydraulic cylinder has been explained, but it can also be carried out by using a linear motor, and it is applicable not only to transfer presses but also to various press machines. It goes without saying that the invention can be applied and that various other changes can be made without departing from the gist of the invention.

[Effects of the Invention] According to the material conveying device for a press machine of the present invention, there is no need to reciprocate the feed bar in a direction parallel to the workpiece feeding direction when feeding the workpiece, so the power for feeding the workpiece is reduced. Since there is no need for a three-dimensional feeding mechanism that uses various complicated and large cams, rack and pinions, etc. to feed the workpiece, the device can be made smaller and the price can be reduced, and various other excellent effects can be achieved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the material conveying device of a press machine of the present invention, FIG. 2 is a view taken from the direction indicated by the ■-■ direction in FIG. 1, and FIG. View, Figure 4 (A) (B) (A
＞ is an explanatory diagram of the operation of the material conveying device of the press machine of the present invention, FIG. 5 is an explanatory diagram of another example of the workpiece conveying device used in the material conveying device of the press machine of the present invention, and FIG. It is an explanatory view of a transfer press. In the figure, 41 is a slide, 42 is an upper mold, 44.45 is a link, 48 is a workpiece, 49 is a feed bar, 53 is a guide surface, 55 is a reduction motor, 58.57 is a sprocket, 58
is chain, 59 is finger, 63 is bolster, B4
85 is a fluid pressure cylinder, and 8B is an arm.

Claims (1)

[Claims] 1) In a press machine that is equipped with a lower mold and an upper mold attached to a slide that can be raised and lowered so that a workpiece can be press-molded by the upper and lower molds, the slide is moved in a direction perpendicular to the workpiece feeding direction. A rotatable parallelogram link is pivotally mounted, a feed bar that can move along a guide surface in a direction perpendicular to the workpiece feeding direction is connected to the link, and the feed bar is connected parallel to the workpiece feeding direction. A material conveyance device for a press machine, characterized in that a finger for supporting a workpiece is attached so as to be able to reciprocate in different directions.