JPH0533925U - Work transfer tool changer for transfer press - Google Patents

Abstract

(57) [Abstract] [Purpose] To make it possible to automatically replace the entire crossbar to which the work transfer tool of the transfer press is attached, and to reduce the weight of the movable parts. [Structure] A crossbar 26 to which a work transfer tool 32 is attached is detachably attached to a transfer mechanism 21 by a trolley 23, a crossbar holding portion 34 that can be positioned on the die 4 is provided, and a carrier for die exchange. 38 is provided with a crossbar exchanging device 39 capable of positioning and exchanging the crossbar 26. The positioning between the crossbar exchanging device 39 and the crossbar 26 and the crossbar 26
Positioning between the mold and the crossbar holding portion 34 of the die 4 allows the crossbar 26 to be handed over in a constantly positioned state, and the crossbar 26 is automatically replaced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a transfer press device for exchanging a work transfer tool, which is provided with a plurality of molds arranged in parallel in a line direction and sequentially sends a work to a molding process in each mold. In addition to being able to automatically replace each unit, the weight of moving parts is reduced.

[0002]

[Prior Art]

 In order to efficiently perform press forming such as complicated deep drawing and bending that require several steps, a transfer press is used, and several slides that can be adjusted separately in the line direction are arranged and different metal stamps are arranged. It consists of an automatic press equipped with a mold, and a transfer device for material transfer that transfers the material to the adjacent molding process for each rotation such as the crank.

In such a transfer press, for example, as shown in FIG. 6, the lower mold 4 a is fixed on the bolsters 2 and 3 attached to the bed 1 in accordance with the respective molding steps A to E, and the lower mold 4 a is fixed to the bed 1. An upper die 4b is attached to slides 7 and 8 which are vertically moved by a driving mechanism in a crown 6 supported by an upright 5 which is automatically pressed so that the two dies 4a and 4b face each other vertically. Is configured.

Further, in a transfer device of a transfer press, as shown in, for example, FIGS. 6 and 7, a pair of transfer bars 11 and 12 that constitute a transfer mechanism 10 are arranged in parallel by sandwiching the upper and lower molds 4, It is supported so that it can be fed (advance-return) and lifted (lift-down) in the transport direction. A plurality of crossbars 13 are attached between the transfer bars 11 and 12 in correspondence with the molding positions A to E, and a vacuum cup 14 constituting a work transfer tool is attached to each crossbar 13. The work 15 is clamped / unclamped.

Further, in the transfer mechanism 10, in order to drive the transfer bars 11 and 12 in accordance with the movement of the slides 7 and 8, each transfer bar 11 and 12 is driven by a cam mechanism which is driven in association with the slides 7 and 8. Is provided, whereby the work 15 is conveyed by a combination of feeding and lifting as shown by the solid arrow in the figure.

In such a transfer device of a transfer press, the driving method of the crossbar 13 includes the above-mentioned feed bar type and a dolly type not shown, but the work 15 to be formed is to be formed in any of the driving types. When the mold 4 is replaced to replace the workpiece, the work transfer tool such as the vacuum cup 14 of the transfer device must also be replaced.

Conventionally, two methods have been adopted for exchanging the work transfer tool. One of them is to replace the entire crossbar 13, and the other is a work transfer tool such as a vacuum cup 14. Only to replace.

An exchange device for exchanging the entire crossbar 13 has been proposed, for example, in Japanese Patent Laid-Open No. 62-238032, which allows the crossbar to be attached to and detached from the feedbar and is attached to the upper surface of the mold. A groove for mounting the crossbar is formed, and a positioning mechanism installed in the groove is used for positioning and exchanging with the mold. On the other hand, as an exchanging device for exchanging only the work transfer tool such as the vacuum cup 14, for example, an attachment / detachment mechanism for the work transfer tool such as the vacuum cup is provided in the crossbar, and the work transfer tool is exchanged when the die is replaced. Only the part is removed and it is carried out of the press together with the mold, and the work transfer tool mounted on the mold to be replaced is attached to the attachment / detachment mechanism.

[0009]

[Problems to be solved by the device]

 In such a conventional work transfer tool changing device, when the crossbar is replaced on the upper surface of the mold, it is necessary to provide a groove and a positioning mechanism on the upper surface of the mold. There is a problem in that If the crossbar is to be replaced on the carrier, the work transfer tool must be replaced on the carrier. Furthermore, when only attaching and detaching the work transfer tool, an attachment / detachment mechanism must be installed in the crossbar, which increases the weight of the moving parts, which makes it impossible to transfer at high speed due to the increase in inertia. There is a problem that causes the vibration of. The present invention has been made in view of the above problems of the prior art, and there is no restriction on the design of the mold, the weight of the moving part is reduced, and the work transfer tool work can be automatically changed. An object of the present invention is to provide a transfer tool changing device.

[0010]

[Means for Solving the Problems]

 In order to solve the problems of the above-mentioned conventional technology, the work transfer tool changing device of the transfer press of the present invention is a work transfer tool attached to a crossbar that reciprocates and moves up and down between a plurality of dies arranged in parallel in the line direction. In a transfer press that conveys workpieces with a work bar, the cross bar to which the work transfer tool is attached is detachably attached to the transfer mechanism, and the die is equipped with a cross bar holding part that positions and supports the cross bar. A crossbar exchanging device that supports the crossbar in a positioning state on a carrier for use and that can be transferred to the crossbar holding portion of the mold and the transfer mechanism is provided.

[0011]

[Action]

 According to the work transfer tool changing device of this transfer press, the crossbar with the work transfer tool is detachably attached to the transfer mechanism such as the feed bar or the trolley, and the crossbar holding part for positioning the die is provided. At the same time, the carrier for mold exchange is equipped with a crossbar exchange device that can position and exchange the crossbar, and the positioning between the crossbar exchange device and the crossbar on the transfer mechanism and the crossbar exchange device and the metal can be performed. The positioning of the crossbar between the mold and the crossbar holder allows the crossbar to be handed over while always positioned.

By changing each crossbar, it is possible to reduce the weight of the movable part, eliminate the need to form a groove by the crossbar holding part, eliminate the restriction on the design of the mold, and further, to maintain the positioning state. The crossbar can be automatically replaced by handing it over. Further, the work transfer tool can be exchanged not on the carrier but in the mold yard, and the crossbar and the work transfer tool can be stored together with the mold in a pair.

[0013]

【Example】

 An embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 5 relate to an embodiment of a work transfer tool changing device for a transfer press according to the present invention. FIG. 1 is a perspective view of a mold part, FIG. 2 is a sectional view of a crossbar positioning mechanism, and FIG. 3 is a transfer. 4 is a perspective view of a mechanical portion, FIG. 4 is an explanatory view of a crossbar attaching / detaching mechanism, and FIG. 5 is an explanatory view of a crossbar replacement operation.

In this work transfer tool changing device 20 of the transfer press, a trolley type is adopted as the transfer mechanism 21 as shown in FIG. 3, and the guide 22 is arranged in parallel along the line direction A 1. A plurality of carriages 23 are movably mounted and connected to each other, and a transfer mechanism 21 is configured with a vertical rack 24 provided on each carriage 23 and driven up and down by a motor and a pinion. A crossbar 26 is attached to the lower end of the vertical rack 24 via a crossbar attaching / detaching mechanism 25, and is arranged in the direction B perpendicular to the line.

As shown in FIG. 4, the crossbar attachment / detachment mechanism 25 has a horizontal rack in which a motor 27 and a speed reducer 28 are attached to the lower end of a vertical rack 24 so as to face each other in the line direction A via brackets. A clamp cylinder 29 is attached to the rotating shaft so as to be rotatable, and an engaging portion is formed at the tip of the cylinder rod 30.

On the other hand, engaging holes 31 positioned in the rotational direction are formed at both ends of the crossbar 26, and by engaging the engaging portions of the cylinder rod 30 of the clamp cylinder 29, The bar 26 can be detachably supported and can be rotated about a horizontal axis. A vacuum cup, which projects toward both sides in the line direction and serves as a work transfer tool 32, is arranged on the crossbar 26 and is detachably fixed to the crossbar 26.

Further, in this work transfer tool changing device 10, the mold 4 for supporting the crossbar 26 is provided with two crossbar holding portions 34 on one side surface thereof, as shown in FIG. .. As shown in FIG. 2, the crossbar holding portion 34 has a U-shaped holding member 35 having an open top and is attached to the lower mold 4a, and an engaging projection 36 is provided at the center of the bottom of the holding member 35. ing.

Corresponding to the engaging protrusion 36 of the holding member 35, an engaging recess 37 is formed on the side surface of the crossbar 26. By engaging these, the crossbar 26 is held by the crossbar 26. The part 34 can be positioned at a predetermined position.

Further, in the work transfer tool changing device 20, the crossbar changing device 39 is mounted on the carrier 38 that carries the mold 4 when transferring the mold 4, as shown in FIG. Further, two lifting rods 40 are provided between the two crossbar holding portions 34 attached to the mold 4, and are vertically driven by a motor and a pinion & rack mechanism (not shown). The upper and lower parts of the elevating rods 40 are provided with a crossbar elevating and holding part 41, which is substantially the same as the crossbar holding part 34 of the mold 4 described with reference to FIG. 2, and has a U-shaped holding member 42 with an open top. , And an engaging protrusion (not shown) at the center of the bottom.

Corresponding to the engaging projections of the holding member 42 of the crossbar lifting and holding unit 41, engaging recesses are formed on the side surfaces of the crossbar 26. By engaging these, the crossbar 26 can be positioned at a predetermined position of the crossbar lift / hold section 41.

Next, the operation of the work transfer tool changing device 20 of the transfer press thus configured will be described. (1) Mold replacement and crossbar replacement When replacing the mold 4, as shown in FIG. 5, the automatic press is driven to lower the upper mold 4b and separate it from the slides 7 and 8. Place on the lower die 4a. After that, the motor 27 of the crossbar attaching / detaching mechanism 25 is driven to rotate the crossbar 26 by 90 degrees so that the work transfer tool 32 is arranged in the vertical direction. The raising / lowering rod 40 of the crossbar 26 is raised so that the holding member 42 of the crossbar raising / lowering holding portion 41 at the upper end fits into the crossbar 26, and the engaging projection of the holding member 42 engages with the engaging concave portion of the crossbar 26. Then, the crossbar 26 is supported and positioned relative to each other (see the cart on the left side in FIG. 5).

Next, the cylinder rod 30 of the clamp cylinder 29 of the crossbar attachment / detachment mechanism 25 is contracted to release the connection between the crossbar 26 and the vertical rack 24, and the transfer mechanism 21 is released. Then, the crossbar 26 supported by the crossbar exchanging device 39 is lowered by the elevating rod 40, and the engaging protrusion 36 of the holding member 35 of the crossbar holding portion 34 of the mold 4 and the engaging recess 37 of the crossbar 26 are formed. And the cross bar 26 is supported by the mold 4, and the cross bar 26 is positioned and held at a predetermined position.

After that, by further lowering the elevating rod 40 of the crossbar exchanging device 39, the crossbar 26 is supported by the crossbar holding portion 34 of the mold 4 (see the cart on the right side in FIG. 5). After the mold 4 and the crossbar 26 are integrated in this way, they are conveyed outside the press by the carrier 38 and replaced with a new mold and crossbar to be replaced.

After that, the mold 4 and the crossbar 26 are attached by a procedure reverse to the above-described procedure of carrying out the mold 4 and the crossbar 26. In this way, the work transfer tool 32 is automatically replaced with the mold 4 and the crossbar 26. Therefore, the work transfer tool 32 can be replaced together with the mold 4 and the crossbar 26 without any intervention of the operator, and the work transfer tool 32 can be replaced efficiently in a short time.

Further, since the work transfer tool 32 is exchanged together with the crossbar 26, the crossbar 26 does not need a mechanism for attaching and detaching the work transfer tool 32, so that the weight can be reduced and the inertia can be reduced. Transfer operation can be speeded up and vibration can be prevented. Further, since the crossbar holding portion 34 is separately attached to the side surface of the mold 4 when the crossbar 26 is held in the mold 4, the design of the mold such as when forming the groove on the upper surface of the mold. The above restrictions also disappear.

In the above embodiment, the transfer mechanism for driving the crossbar has been described as a trolley type, but the present invention is not limited to this, and a feedbar type may be used, and the gist of the invention is not deviated. It goes without saying that various changes can be made to each component within the range.

[0027]

[Effect of the device]

 As described above in detail with reference to the embodiment, according to the work transfer tool exchanging device of the transfer press of the present invention, the cross bar having the work transfer tool attached to the transfer mechanism such as the feed bar or the carriage is provided. Since it is detachably attached, a crossbar holding part that can be positioned on the mold is provided, and a crossbar replacement device that can position and replace the crossbar is provided on the carrier for mold replacement. Positioning with the upper crossbar and positioning the crossbar between the crossbar exchange device and the crossbar holding part of the mold allow the crossbar to be handed over in a constantly positioned state. Can be replaced automatically.

Further, the weight of the movable part can be reduced by replacing each crossbar, the transfer speed can be increased, and the vibration can be prevented. Further, the crossbar holding portion eliminates the need to form a groove in the mold, which eliminates the constraint of mold design.

[Brief description of drawings]

FIG. 1 is a perspective view of a mold part according to an embodiment of a work transfer tool changing device of a transfer press of the present invention.

FIG. 2 is a cross-sectional view of a crossbar positioning mechanism according to an embodiment of the work transfer tool changing device of the transfer press of the present invention.

FIG. 3 is a perspective view of a transfer mechanism portion according to an embodiment of the work transfer tool changing device of the transfer press of the present invention.

FIG. 4 is an explanatory view of a crossbar attaching / detaching mechanism according to an embodiment of the work transfer tool changing device of the transfer press of the present invention.

FIG. 5 is an explanatory view of a crossbar exchanging operation according to an embodiment of a work transfer tool exchanging device for a transfer press of the present invention.

FIG. 6 is a schematic configuration diagram of a transfer press to which the present invention is applied.

FIG. 7 is a schematic perspective view of a conventional feed bar type transfer device.

[Explanation of symbols]

 A Transfer direction B Transfer right angle direction 4 Mold 20 Transfer press work transfer tool changing device 21 Transfer mechanism 25 Crossbar attaching / detaching mechanism 26 Crossbar 30 Cylinder rod 31 Engagement hole 32 Work transfer tool (vacuum cup) 34 Crossbar holding part 38 Carrier 39 Crossbar Exchanger 40 Lifting Rod 41 Crossbar Lifting / Holding Unit

Claims (1)

[Scope of utility model registration request] 1. A transfer press for transferring a work by a work transfer tool attached to a cross bar that reciprocates and moves up and down between a plurality of dies arranged side by side in a line direction,
While a crossbar with the work transfer tool attached is detachably attached to the transfer mechanism, a crossbar holding part for positioning and supporting the crossbar is provided on the mold, and the crossbar is positioned on the mold replacement carrier. A work transfer tool exchanging device for a transfer press, which is provided with a crossbar exchanging device that supports and can be transferred to the crossbar holding portion of the die and the transfer mechanism.