EP0878251A1 - Transfer press with a laterally located support on a moving bolster for workpiece-holders - Google Patents

Abstract

The transfer press (1) includes at least one press station (2) with a press table (16) which can be moved out of this station, and serves for seating at least one change-able tool (6, 11). It further includes a transfer unit (27) which serves for supply and removal of sheet metal workpieces, and incorporates a changeable holding element (31) which is located before and/or after the tool (6, 11) when the latter is closed. There is at least one seating (33) for the holding element (31) on the press table (16) and/or the tool (6, 11). During tool changes the holding element is held in a changing position with an orientation which differs from the orientation of this element in its operating position. The method for operating the press is characterised by the fact that in the changing position the holding element is held besides the tool (6, 11) in an appropriate seating (33) and that the press table with the tool and the holding element can be taken out of the press.

Description

The invention relates to a transfer press with the Features of the preamble of claim 1 and a Procedure for changing tools and tooling at a such transfer press, with the features of the generic term of claim 17.

Transfer presses, such as those from the EP-B-0 388 610 are known to have a series of press stations on that of a workpiece in the transfer direction to go through. The press stations are through tools divided into upper and lower tools defined, the upper tool on a ram attached and the lower tool on a press table is stored. A transfer device is used for workpiece transport, for example a two-axis transfer with Crossbeams on which suction frames are held. The Press also has a press frame to which usually arranged between the workstations Press stands belong.

The press tables with the tools stored on it usually from the side the transfer press led out. You will be between passed through the press stands, the space available are usually designed so that the press tables just fit between the press stands.

The suction frame or belonging to the transfer system other holding means are during the operation of the transfer press between the tools, i.e. for example in Area of the press stand, held when the tools conclude. The holding means must first have this position also take if the top tool is on the bottom tool is filed to it with the sliding table from the To be able to pull out the transfer press.

In addition to changing tools, it is often also required to change the holding means. This is supposed to understandably as simple and as little as possible personnel-intensive manner. However, at least some holding devices do not easily move out of the side Heat presses are brought out because they are otherwise would collide with the press stands.

Based on this, it is an object of the invention to Transfer press to create an easy tool change including a simple tooling change allowed, whereby to the tooling also to a transfer system proper holding means belong.

This task is performed by the transfer press with the Features of claim 1 and the method for Tool and tooling change with the features of the claim 17 solved.

The transfer press has a receiving means that serves the tooling removed from the transfer system on the press table (or tool) so that the press table with tools and tooling from the transfer press can be extended. According to the invention the tooling on the receiving means in one orientation and orientation, which is different from the orientation in distinguishes the transfer system. This enables that For example, holding means belonging to the tooling of the transfer system stored at one point on the press table, at which they particularly with regard to the direction of transfer do not protrude beyond the table contour. A corresponding one provided transport facility for the tooling is included able the spatial orientation of the holding means change appropriately so that the holding means on Places on the press table that can be stored with the Transfer system alone cannot be reached. this makes possible it, the holding means in otherwise unused places the tool or press table on which they are to be placed moving the press table in and out of the transfer press do not hinder. In addition, the filing points (Receiving means) should be selected so that the on the press table stored tools, for example for a Crane, are easily accessible.

Is through the inventive design of the transfer press on the front and back in the transfer direction no additional space on the side of the press table required for the holding means (the tooling), the Press tables only the width of a press stand be set up at a distance from each other. The Clearances between the press tables and thus between the tools become very short, which makes it quick Workpiece transfer and therefore a high number of cycles Press enabled.

The transport device for transferring the tooling from the transfer system to the storage area of the press table is particularly useful for transfer presses with two-axis transfer advantageous. Those held on the crossbeams Holding means, for example suction frames, suction spiders or the like, require a relatively large amount of space. The transport device enables storage at neutral locations the press table or the tool. While the sucker frame cross with the crossbars in the operating position extending to the transfer direction, they will be at rest stored in the longitudinal direction to the side of the tools. This is an area that occurs during sheet metal part transport not crossed by the respective sheet metal part becomes. This also allows the transfer press in To build the transfer direction as short as possible, which is the number of strokes benefits.

The holding means can be in the side area of the press table oriented both lengthways and vertically be kept. This is from the specific training of the Depending on the receiving agent. The transport device points accordingly a vertical, a horizontal or a inclined pivot axis. The transport device can be placed on the press table or tool be and at the same time as a receiving means for holding the Serve holding means in the rest position. The transport device can also be designed as a transfer device and on a press stand, i.e. from the press table be kept separate, the holding means to the the holder provided at the press table passes.

If necessary, especially with press tables, the several tools, spaced apart from each other have individual holding means (tooling) between the Tools are stored. This applies in particular to Retaining means that are in the rest position above the press table between tools and therefore not in the range of Press stands are held. These are holding devices not swiveled when placed on the press table.

The transfer device can be designed that the holding means taken over through the open tool or via the closed tool detached from the ram is pivoted. The latter can be useful if the transfer device not only a swivel, but also performs a lifting movement, or if the Storage on the press table is done relatively high.

According to the invention when changing tools and tooling the tooling belonging to the transfer system his working position in a changing or resting position pivoted and placed on the press table. The preferred then press table designed as a sliding table moved out of the transfer press with tools and tooling. By pivoting the tooling according to the invention, in particular the holding means, these can turn to side areas of the press table can be transported. For the Storage of the holding means therefore does not need any additional space extending the press table in the transfer direction be provided. In the side area, the holding means horizontally or vertically, but in any case in one Plane are kept vertical and longitudinal is aligned. For example as a suction frame or Suction spider trained holding means can both be kept flat as well as rotated about its longitudinal axis. For this purpose, the transport device then has at least two Swivel or rotary axes on.

Further features of advantageous embodiments of the Transfer presses according to the invention or of the invention Procedures for changing tools and tooling are Subject of individual subclaims.

Fig. 1 eine Transferpresse in einer schematisierten, ausschnittsweisen Seitenansicht,

Fig. 2 eine gegenüber der Transferpresse nach Fig. 1 abgewandelte Transferpresse, in einer geschnittenen, symbolischen Draufsicht sowie zusätzliche, mit Werkzeugen und Tooling versehene Schiebetische in Draufsicht,

Fig. 3 eine als Schwenkarm ausgebildete Aufnahme- und Transporteinrichtung für zu dem Transfersystem der Transferpresse nach Fig. 1 gehörige Haltemittel, in einer vereinfachten Draufsicht,

Fig. 4 den Schwenkarm nach Fig. 3 in einer teilweise geschnittenen Vorderansicht und in Kuppelstellung, in der er mit dem Haltemittel gekuppelt ist,

Fig. 5 den Schwenkarm nach den Fig. 3 und 4 in einer Entkuppelstellung und in einer schematisierten längsgeschnittenen Darstellung und

Fig. 6 den Schwenkarm nach Fig. 5 in einer Querschnittsdarstellung und in einem anderen Maßstab.

Exemplary embodiments of the invention are illustrated in the drawing. Show it:

1 is a transfer press in a schematic, partial side view,

FIG. 2 shows a transfer press modified in comparison to the transfer press according to FIG. 1, in a cut, symbolic top view and additional sliding tables provided with tools and tooling in a top view, FIG.

3 shows a receiving and transport device designed as a swivel arm for holding means belonging to the transfer system of the transfer press according to FIG. 1, in a simplified plan view,

4 in a partially sectioned front view and in the coupling position in which it is coupled to the holding means,

5 shows the swivel arm according to FIGS. 3 and 4 in a decoupling position and in a schematic longitudinal section and

Fig. 6 shows the swivel arm according to Fig. 5 in a cross-sectional view and on a different scale.

description

1 shows a transfer press 1, the several press stations 2, 3, 4, 5 and others, Has press stations, not shown. In every Press station 2, 3, 4, 5 is in each case a lower tool 6, 7, 8 and upper tool 11, 12, 13 existing Tool arranged. While the upper tools 11, 12, 13 are held releasably on plungers 14, 15, the lower tools are mounted 6, 7, 8 on press tables 16, 17.

One does not serve to drive the plungers 14, 15 shown drive device, which is from a press frame 18 is worn. This includes several press stands 21, 22, 23, the one or more head pieces 24 carry.

While the plunger 14, 15 in corresponding guides vertically displaceable on the press stands 21, 22, 23 are stored, the press tables 16, 17 as sliding tables trained on corresponding rollers 25th stored laterally from the transfer press if necessary can be pulled out.

For the transport of parts between the individual press stations 2, 3, 4, 5 serves a transfer system 27, which as Two-axis transfer is formed. To the transfer system 27 include transfer rails 28 that are parallel to each other in the transfer direction lengthways through the transfer press 1 extend. The transfer rails 28 are among one another connected by cross members 29, the holding means, such as for example, suction frame 31, wear. These are workpiece-specific trained and thus if necessary switch. The same applies to the upper tools 11, 12, 13 and the lower tools 6, 7, 8. The suction frame 31 can, as can be seen from the exemplary embodiment according to FIG. 2, be significantly narrower than the cross members 29. It are then on a crossbar 29, for example, two suction frames 31a, 31b arranged side by side.

The suction frame 31 lead, carried by the cross members 29 and the transfer rails 28, a transfer movement in which the individual sheet metal parts from one Remove press station 2, 3, 4 and the following one Feed press station 3, 4, 5. Is a sheet metal part stored and closes in a press station 2, 3, 4, 5 the tool in question, the suction frame 31 of the transfer system in appropriate spaces between the tools. The gap between press stage 2 and press stage 3 covered by the press stand 22. The press stand 23 covers the space between the press stations 4 and 5.

If the transfer press 1 is set up for a new workpiece, the upper tools 11, 12, 13, the lower tools 6, 7, 8 and the suction frame 31 must be changed. The removal of the suction frame 31 from the intermediate spaces covered by the press stands 22, 23 presents a certain difficulty. In order to remedy this, receptacles 33 pivotably mounted about a vertical axis 32 are arranged on the press tables 16, 17, as separately shown in FIGS 3 to 6 are illustrated. Such a receptacle 33 is an angled arm 35 provided at the end with a pivot bearing 34. The pivot bearing 34 supports the arm 35 on a pin 36 connected to the respective press table 16, 17, so that a pivoting movement can be carried out in a horizontal plane.
The arm 35 carries two spaced-apart vertical supports 37, 38 which are designed as hollow box profiles and are closed at both ends. A pneumatic cylinder 39, 41 is arranged in each vertical support 37, 38 and actuates a vertically adjustable coupling pin 42, 43. As illustrated by the comparison of FIG. 4 with FIG. 5, these can thus be pushed forward or withdrawn beyond the contact surface 44 (FIG. 6) formed on the upper side of the vertical supports 37, 38.

The suction frame 31 held on the crossbar 29 has corresponding receiving openings on its underside 46 for receiving the coupling bolts 42, 43. To grab the coupling bolts 42, 43 into the receiving openings 46, the suction frame 31 is immovable on the pivotable Recording stored.

In addition to the receptacles 33, there are 17 on the press table between the lower tools 7, 8 with respect to the press table 17 stationary recordings provided. These serve the Inclusion of suction frame 31 when changing tools, the stand above the press table 17.

A modified embodiment of the transfer press 1 is a horizontal sectional view in FIG. 2 illustrates, the cut in a plane between the upper tools and the lower tools is guided. It are two arranged between press stands 21, 22, 23 Press tables 16, 17 provided as sliding tables for lateral movement out of the transfer press 1 is formed are. The main difference between the transfer press 1 according to FIG. 1 and the transfer press 1 according to FIG. 2 is the number of press tables 16, 17 stored lower tools. The press table 16 of the transfer press 1 carries two lower tools 6a, 6b and the press table 17 carries three lower tools 7a, 7b, 7c.

Is between the lower tools 6a, 6b, in the transfer direction T measured, a distance maintained with the Distances between the other sub-tools 7a, 7b, 7c matches. The lower tools 6a, 6b close in Transfer direction T at the front and rear essentially smoothly with the press table 16. The same applies to the Lower tools 7a, 7c of the press table 17. The distance between the press tables 16, 17 and thus between the Lower tools 6b, 7a agree with the other distances between the lower tools.

While the lower tools 6a, 6b, 7a, 7b, 7c die Press tables 16, 17 in their entire length exploit, they are narrower than the press tables 16, 17, so that next to the lower tools 6, 7 storage areas 48, 49 are formed for the suction frame 31. For transferring the suction frame 31 into the storage areas 48, 49 serve the receptacles 33 on the press tables 16, 17 are pivotally mounted. Also are between the lower tools 6a, 6b; 7a, 7b, 7c stationary recordings 47 arranged. These serve to accommodate suction frames 31 of the transfer system 27, the carbon fiber material existing cross members 29 at regular intervals in Fig. 2 are symbolically indicated and arranged so that the suction frame 31 with closing tools exactly stand between them.

The tool and tooling change is as follows based on the transfer press 1 illustrated in FIG. 2 described:

For the tool change, the transfer system is controlled that all suction frame 31 between the tools (Lower tools 6a, 6b, 7a, 7b, 7c) are available. Below become the upper tools not shown in Fig. 2 on the lower tools 6a, 6b, 7a, 7b, 7c stored and separated from the plungers. The recordings 33 are pivoted into the respective storage area 48, 49.

To hand over the tooling, i.e. the suction frame 31, the receptacles 33 from the storage areas 48, 49 each pivoted 90 ° around the vertical axis so that it below the corresponding crossbar 29 parallel to this stand. As can be seen from Fig. 2, are each the left-hand storage area 48 and the right-hand side Storage area 48 associated receptacles 33 in their length so that they are about to the middle of the Crossbar 29 range. Each receptacle 33 thus serves each takeover of a suction frame 31a, 31b.

In the next step, those in FIG. 2 will not continue Transfer rails 28 shown with the cross beams 29th lowered so that the suction frame 31a, 31b on the recordings 33 sit on. At the same time put the between the Tools located suction frame 31a, 31b on the recordings there 47. At this stage, the Suction frame 31a, 31b released from the cross members and the Pneumatic cylinders 39, 41 illustrated in FIG. 4 are actuated so that the coupling bolts 42, 43 the Secure the suction frame 31a, 31b to the holder 33. The The suction frame 31a, 31b is released by means of corresponding between crossbeam 29 and suction frame 31a, 31b arranged coupling means, the pneumatic, electric or by a relative movement between crossbar 29 and suction frame 31a, 31b can be controlled.

After taking over the suction frame in this respect 31a, 31b through the receptacles 33, 47 become the cross members raised and the receptacles 33 in the storage area 48 swiveled. An electrical, pneumatic is used for this or hydraulically actuated, not shown Drive device for the arm 35. Can if necessary the recordings 33, 47 are still lowered.

The suction frame 31a, 31b are now out of their working position pivoted into a rest position, in which it is in the storage area not traversed by the workpieces 48 are held. The press table 16 can now move sideways be moved out of the transfer press 1. The press table 16 is then in the sketched in Fig. 2 above Position and carries both the tools 6a, 6b and the upper tools 11a, 11b as well as those for the tooling associated suction frame 31a, 31b.

The tool change takes place on the press table 17 basically in a similar way. However, the press table points 17 four swiveling arranged at its corners Recordings 33, whereas the press table 16 only two Recordings 33 has. The panning movement of the recordings 33 and placing the suction frame 31a, 31b on the receptacles 33, 47, however, is basically the same Way, after which the press table 17 between the press stands 22, 23 can be extended. In its retracted Position is illustrated in Fig. 2 above.

Alternatively, on the press stands 21, 22, 23 Transfer devices can be stored, the suction frame Remove 31a, 31b from the crossbeams 29 and into the Storage areas 48, 49 hand over arranged fixed receptacles. In addition, both embodiments are possible at which the recordings 33 on the closed tools be pivoted, as well as embodiments in which the receptacles 33 pivoted through the open tool will. If necessary, lifting devices can be provided so that the recordings are raised and lowered can be.

In embodiments with narrower cross members 29 it may be sufficient for the person on the crossbeam 29 holding means held only one receptacle 33 provide, the length of which is then approximately the width of the crossbar 29 corresponds.

The suction frame can be used to further save space 31 have movably mounted suction arms. these can For example, pivotable about a vertical axis on the suction frame 31 be stored so that they can be shortened when not in use allow the suction frame 31 in the transfer direction.

In a transfer press 1 there are one or sliding tables 16, 17 assigned to several press stations provided for tool change, preferably laterally can be moved out of the transfer press 1. The sliding tables 16, 17 or the tools stored on them Recording devices 33, 47 for the tooling to which at least workpiece-specific holding means 31 a Transfer system 27 include that the parts transport from Press station is used to press station. The recording 33 is to move the sliding tables 16, 17 out of the Transfer press 1 in separate storage areas 48, 49 positioned. These storage areas 48, 49 are preferred provided on the side next to the tools and such arranged that they refer to the direction of travel of the respective sliding table 16, 17 the width of the same (i.e., related to the direction of transfer, its length) do not enlarge. When transferring the receiving means 31 from their working position assumed in the transfer system 27 out in the storage position Holding means pivoted. This is done either by yourself pivotable receptacle 33 or a separate Transfer device.

Claims (18)

Transfer press (1) for processing sheet metal parts, in particular suction press, with at least one press station (2), in which a press table (16), which can be moved out of the press station (2), is arranged, which serves to hold at least one tool (6, 11) to be changed, if necessary, for processing the sheet metal part, with a transfer device (27) for feeding and / or removing the sheet metal parts to and from the press station (2) in a predetermined transfer direction,
the transfer device (27) includes at least one holding means (31), which is to be changed as required, for temporarily holding the sheet metal parts and is located in front of and / or behind the tool (6, 11) in the transfer direction when the tool (6, 11) is closed becomes,
characterized, that at least one receiving means (33) for the holding means (31) is provided on the press table (16) and / or the tool (6, 11) and that the receiving means (33) holds the holding means (31) when changing tools in a storage area (48) with an orientation that differs from the orientation of the holding means (31) in the operating position. Transfer press according to claim 1, characterized in that the transfer device (27) is a two-axis transfer at least one crossbeam (29) is from which the holding means (31) is worn. Transfer press according to claim 1, characterized in that the holding means (31) is an elongated, itself extending in a direction transverse to the transfer direction Sucker frame (31) is the transfer path of the sheet metal parts spanned across at least in sections. Transfer press according to claim 1, characterized in that the receiving means (33) in the workpiece a side area (48) serving as a storage area (48) of the press table (16) transferred during the sheet metal part transport is not crossed by the sheet metal part. Transfer press according to claim 1, characterized in that the transfer press (1) at least one Transport device (33) for transferring the holding means (31) from its in the transfer system (27) Operating position in its storage position for tool change having. Transfer press according to claim 5, characterized in that the transport device (33) is a swivel device is. Transfer press according to claim 6, characterized in that that the swivel device is one from the transverse axis has different pivot axis (32). Transfer press according to claim 6, characterized in that that the swivel device has a swivel arm (35), the coupling means (42, 43) for coupling of the holding means (31). Transfer press according to claim 8, characterized in that the swivel arm (35) has at least one bearing element (44), which holds the holding means (31), and that to the coupling means (42, 43) at least one power-operated One of the bolts is used to secure the position of the holding means (42, 43) can be brought into and out of engagement with it is. Transfer press according to claim 1, characterized in that the swivel device is configured in this way is that the received holding means (31) during the transfer from his working position in which it is at the Transfer device (27) is received, in its changing position, in which it is held pivoted over the closed tool (6, 11) is pivotable, the upper tool (11) of one the press ram (14) belonging to the press station (2) is. Transfer press according to claim 1, characterized in that the swivel device is configured in this way is that the received holding means (31) during the transfer from his working position in which it is at the Transfer device (27) is held in its changing position, in which it is held pivoted by the open tool (6, 11) is pivotable, the lower tool (6) rests on the press table (16) and its upper tool (11) from one belonging to the press station (2) Press ram (14) at a vertical distance from the Lower tool (6) is held. Transfer press according to claim 5, characterized in that the transport device (33) on the press table (16) is provided and preferably at the same time as Receiving means (33) is used. Transfer press according to claim 5, characterized in that the press station (2) at least one Press stand (21) is assigned to the transport device (33) carries. Transfer press according to claim 5, characterized in that the tool (6) on at least one in Transfer direction at the front or rear edge of the press table (16) ends with this, and that the transport device (33) at least one of the press table (16) assigned holding means (31) in the lateral storage area (48) transferred while when the press table (16) carries several tools (6a, 6b) for holding means (31), the workpiece transport between the tools (6a, 6b) serve at least one receiving means (47) between the tools (6a, 6b) is provided. Transfer press according to claim 1, characterized in that the length of the Press table (16) essentially with the distance between two adjacent to the press table (16) in the transfer direction Press stands (21, 22) matches and that the width of the tool (6) measured in the transverse direction is less than the width of the press table (16). Transfer press according to claim 3, characterized in that the suction frame (31) has suction arms, which are provided with suction on the side and which are movable are stored. Procedure for changing tools and tooling at a transfer press (1) with at least one press table (16) on which at least one tool (6, 11) is held and with a transfer device (27) which at least a holding means to be changed if necessary (31) has, characterized in that the holding means (31) from his working position to a changing position is pivoted in which the holding means (31) with respect to Transfer direction to the side of the tool (6, 11) a corresponding receiving means (33) is held and that the press table (16) with tool (6, 11) and holding means (31) (Tooling) moved out of the transfer press becomes. A method according to claim 17, characterized in that in the working position across the transfer direction aligned holding means (31) in changing position in a plane that is aligned lengthways and vertically is.

Images