JP3305360B2 - Transfer press line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer press line for processing a blank having a large area in a plurality of processing steps. A plurality of individual presses connected to each other in the area of the table and connected to a common drive shaft by means of a connecting shaft, a non-loading step during each machining step, a temporary The present invention relates to a transfer press line having a storage, a device for supplying and removing blanks, and a stepwise transfer from one process to the next.

[0002]

2. Description of the Related Art A known press installation of this kind (cf. DE 39 05 069 A1) is
The press table and the headpiece are connected to each other by separate press stands or by a common press stand attached to two adjacent presses, and are provided with a connecting shaft. Driven synchronously by the central drive unit. Each press is assigned a unique processing step. Between the two processing steps, there is in each case a non-loading step in the stand area, in which the blank is oriented and lowered. This temporary storage space is automatically adjusted by the adjusting means in accordance with the height, size, shape and inclination of the blank when the mold (tool) is replaced. The loading of the blank into or out of the press and the transport from one processing step to the next are performed by a horizontal bar with suction cups. The horizontal bar with the suction cup is movably supported by a support rail extending through the entire press equipment, and is driven by a press drive device via a cam transmission. When the mold is replaced, the horizontal bar with the suction cup is detached from the support rail, lowered to the receiving portion of the slide table, and carried out of the press together with the mold.

[0003] In another known system (see DE-A-400 00 590), the temporary storage in the no-load process is provided with a product-specific storage station, which is used when changing dies. Then, it is lowered to a receiving portion provided on a slide table along with a horizontal bar with a suction cup, and is carried out of a press together with a mold set. The storage jig and the suction bar attached to the new mold set reach the press again in the reverse order.

In the case of the first known method, there is a disadvantage in that a considerable amount of control expense is required for automatically adjusting the temporary storage space to the respective blank shape, and in the case of the second known method, The disadvantage is that high costs are required for automatic coupling and locking devices in the intermediate storage and in the slide table.

[0005] The storage jig and the suction bar mounted laterally on the slide table beside the mold set require a considerable amount of space, which increases the width of the press stand in the direction of blank passage. This allows
Particularly in optimal stiffness conditions and in good guiding conditions, more material is used for the ram guided by the press stand, which adversely affects the dynamics of the drive. The limited, narrow intermediate space between the press stand and the slide table significantly limits the availability of wide suction cup spiders, which limits the best handling of the blank.

[0006]

SUMMARY OF THE INVENTION The object of the present invention was necessary in the prior art for receiving a horizontal bar with a suction cup or a suction cup spider and possibly a storage jig in addition to the mold when changing the mold. By eliminating the need for installation of a connection system, the stand width between individual presses is shortened by making the slide table narrow in the product transport direction, thereby improving rigidity and dynamic characteristics, and at the same time suction cups The object is to form a transfer press line of the type mentioned at the outset, so that the system for changing the bar and the storage jig is simple and clean.

[0007]

According to the invention, this object is achieved in a transfer press line of the type mentioned at the outset in that the press tables whose end faces are connected to one another are located between the press stands of the adjacent presses. A yard / exchange station is arranged between the two presses, which can be unloaded from the no-load process area through the free space at right angles to the conveying direction. A jig holder for an exchangeable storage jig of the storage space is supported by the adjusting drive so as to be swingable, height-adjustable and possibly movable in the horizontal direction, and the exchangeable parts of the transport device (horizontal with suction cup) This is achieved by the arrangement of the receiving part for the rod or sucker spider or gripper).

The claims 2 to 5 particularly relate to the shape of the storage / exchange station, and the space required for exchanging the suction cup spider according to the features of claims 2 and 3 is the prior art. Or the width of the suction cup spider is increased for better handling.

Claim 6 describes a configuration for increasing the stability, wherein the strain of the frames of the individual presses is not transmitted to one another. The features of claim 7 improve the stability of the press frame and the accuracy of the ram guide.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in FIGS.

[0011] The transfer press line includes a plurality of presses 1.1, 1.2, 1.
3 (see FIG. 1). Each press 1.1, 1.
2 and 1.3, on the frame side, consist of a press table 2, a headpiece 3 and a press stand 4, which are connected to each other by bolts 5 which have been tightened in advance. The ram 6 is a ram guide 28 of the press stand 4
And is movably supported in the vertical direction, and is connected to the transmission by four connecting rods. The transmissions of all the presses 1.1, 1.2, 1.3 of the press line are linked via a connecting shaft to a common press drive.

The press table 2 is preferably formed in an I-shape in plan view (see FIG. 3) and is supported on a foundation 8 by columns 7 (see FIG. 1). In that case, the press table 2 of the adjacent press 1.1, 1.2, 1.3
Are respectively supported on a common column 7, whose outer regions are possibly connected to one another by clamping bolts 9. The width of the press stand 4 and its position on the press table 2 are determined by the adjacent presses 1.1, 1.2, 1.3.
Are determined so that a free space exists between the press stands 4.

Each press 1.1, 1.2, 1.3 is assigned only one working step. During each processing step, a non-loading step is provided, in which the blank is oriented in a temporary storage and its position is possibly changed.

The mold 10 is used for pressing 1.
It is arranged on a slide table 11 which is carried out from a mold chamber of 1, 1.2, 1.3.

All the presses in the press line, for putting the blanks in and out of the transfer press line and for transporting them from one working step to the next.
Two support rails 1 extending through 1, 1.2, 1.3
2 are provided. These support rails 12 are connected to one another by a cross bar 13 with a suction cup, the movement of which is drawn from the press drive via a cam transmission or a cam connector transmission (not shown). Depending on the hardness and shape of the blank, the transport can, of course, also be effected by grippers which can be moved two-dimensionally or three-dimensionally in a known manner. Note that, instead of the horizontal bar with a suction cup, the support rails may be connected by a cross beam 27 equipped with a suction spider (not shown) in FIGS. In this case, both ends of the cross beam 27 are fixed to the press stand 4 by fastening bolts 9 shown in FIG.

A yard / exchange station 14 exists for each no-load process. The station 14 has a jig holder 15 for receiving a product-specific exchangeable storage jig 16, which can be adjusted in height by an elevating device 24, and can be swung by a swing drive device 25 by a limited angle and can be adjusted and driven. It is movably supported in the transport direction by the device 20 (see FIGS. 4 and 5). The jig holder 15 is formed in a divided structure, and can be lowered to a vertical position by the rocking drive device 17 for exchanging the mold for locational reasons. On the upper side of the jig holder 15, there are two receiving portions 18, 19 for receiving the horizontal bar 13 with a suction cup or the suction spider when the mold is replaced. These receiving parts 1
8, 19 are provided with a lifting device 26 and a locking device,
By means of these devices, the suction bar 13 or the suction spider is in turn disconnected from the support rail 12 and lowered to two floors.

In order to avoid mutual interference when the two horizontal bars 13 with suction cups are separated successively in time, the receiving portion 1
8, 19 can be swung to the horizontal position by the swing driving device 23. In the same way, it is of course also possible for only one receiving part 18 to be equipped with a locking device, so that both suction rods 13 can be received up and down. In the case of the horizontal bar 13 with a suction cup that is wide in the transport direction,
It is also suitable for the purpose that this swings to the vertical position in the receiving portion 19. When the mold is changed simultaneously with the slide table 11, the storage and change station 14 together with the storage jig 16 and the horizontal bar 13 with suction cup or the suction cup spider, which are present thereon, press the adjacent presses 1.1, 1..
Through the free space between the press stands 2 of 1.3
By means of the individual drives, they are carried out of the no-load process area on the running rails 22 in the same way as the slide table 11 and are already mounted outside the press on the next blank to be machined. Can be

In order to avoid horizontal vibrations, it is particularly advantageous to provide spacers 21 between the headpieces 3 of the adjacent presses 1.1, 1.2, 1.3 or between the upper areas of the press stand 4. (See FIG. 1).
The spacer 21 is formed to have elasticity in the vertical direction but to be hard in the horizontal direction in order to compensate for the distortion of the press frame in the loaded state. In a simple configuration, the spacer 21 consists of two flanges which are screwed to the headpiece 3 and which are connected to one another by an elastic intermediate web, for example a very thin sheet metal (see FIG. 2).

[0019]

According to the invention, the stand width between the individual presses is reduced, thereby improving the stiffness and dynamic properties, while at the same time providing a simple and clean system for changing the suction bar and the storage jig. Can be formed.

[Brief description of the drawings]

FIG. 1 is a front view of a transfer press line.

FIG. 2 is a side view taken along the line II-II of FIG.

FIG. 3 is a plan view along the line III-III in FIG. 1;

FIG. 4 is a front view of a storage / exchange station at a mold exchanging position.

FIG. 5 is a side view of the storage / exchange station of FIG. 4;

[Explanation of symbols]

 1-3 press 2 press table 4 press stand 13 horizontal bar with suction cup 14 storage / exchange station 15 jig holder 16 storage jig 17 swing drive unit 18, 19 receiving unit 26 elevating device 27 cross beam 28 ram guide

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ Identification code FI B30B 13/00 B30B 13/00 M (56) References JP-A-2-2477031 (JP, A) JP-A-63-115633 (JP) JP, A) European Patent Application Publication No. 423749 (EP, A1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21D 43/05 B21D 43/00 B30B 13/00

Claims (7)

(57) [Claims] 1. A transfer press line for processing a blank having a large area in a plurality of processing steps, wherein the transfer pressing line is installed at a small interval from each other, and is assigned a unique processing step. Composed of a plurality of individual presses coupled and connected to a common drive shaft by a connecting shaft, a no-load process during each processing step, a temporary storage for receiving a blank in the no-load process, supplying a blank and A press table (2) having end faces connected to each other in a transfer press line having an apparatus for removing and transferring in a stepwise manner from one step to the next step
Are formed such that there is free space between the press stands (4) of the adjacent presses (1.1, 1.2, 1.3) and the two presses (1.1, 1.2, 1) .3) a storage and exchange station (1) which can be unloaded from the no-load process area through said free space at right angles to the transport direction
4) is located, and this storage and exchange station (14)
The jig holder (15) for the exchangeable storage jig (16) of the temporary storage is swingable by the adjusting drive device,
Arranged in a height-adjustable manner and possibly in a horizontal direction, and receiving parts (18, 19) for exchangeable parts of the conveying device (crossbars 13 with suction cups or suction cup spiders or grippers) are arranged. Transfer press line. 2. A storage and exchange station (14) in which a receiving rod (18, 19) for a suction rod (13) or a suction cup spider or gripper is swingable and height-adjustable by a lifting device (26). The horizontal bars with suction cups (13) or the grippers are arranged on two floors vertically in the horizontal position when the molds are changed, respectively.
The transfer press line according to claim 1, wherein the transfer press line is lowered. 3. A storage / exchange station (14) in which a receiving rod (18, 19) for a suction rod (13) or a suction cup spider or gripper is swingable and height-adjustable by a lifting device (26). When the mold is replaced, the horizontal bar with suction cup (13) or the gripper is 9
2. The transfer press line according to claim 1, wherein the transfer press line is oscillated by 0 [deg.] And is lowered in a vertical position. 4. The jig holder (15) is divided into two parts,
When these two divided parts are replaced with a mold, the swing driving device (2)
2. The transfer press line according to claim 1, wherein the transfer press line can be lowered to a vertical position by 7). 5. The transfer press line according to claim 1, wherein a second storage / exchange station is provided at a standby position outside the press line for each no-loading step. 6. An adjacent press (1.1, 1.2, 1..
3. The press frame according to claim 1, wherein the press frames are connected to one another in their upper region, in particular in the head piece, by vertically elastic but horizontally rigid spacers. Transfer press line. 7. Each press (1.1, 1...) As viewed in the transport direction.
For adjusting the ram guide (28) in the area of the ram guide (28) between the press stands (2, 1.3) and on both struts of the U-shaped press stand (4). A cross beam (2) that can be tightened with a tightening rod (9)
7. The transfer press line according to claim 1, wherein 7) is fixed.