DE2905559A1 - Split press tool finishing device - has ram sliding on two columns engaged by adjustable stops at plunger ends - Google Patents

Abstract

The device has a work table /10/ resting on the floor, and two guide columns /12/ connected by cross beam /14/ at the top. The columns serve as guide elements for cylinders /16/ designed as guide bushings. A mobile plunger /18/ is rigidly connected to the two cylinders. The plunger is provided on its underside with T-shaped grooves /54/ serving for securing the upper tool part to the ram. The top surface of the plunger is provided with two T-shaped grooves /60/ which work together with locking elements /62/ suspended by stems from large diameter discs /64/, which rest on the cross beam. The locking movement is carried out by a 90 deg. swing of the locking element once it engages the grooves in such a way that both discs have an operating arm /66/ connected by a link arm /68/, on which the push rod /72/ of a double acting positioner /74/ is connected.

Description

Spotting device

The invention relates to a spotting device according to the preamble of claim 1.

Spotting devices are used to mate the halves of a Pressing tool -used. This is done with a view to the shortest possible manufacturing time of the tool often in such a way that the two halves of the tool (lower mold and upper mold) at the same time on two on a scale of 1: 1 I # mold halves adapts, which have the shape of the other tool half. The work of customizing requires that the model mold half and the tool half be under careful pressure be applied to each other. So far you had to go through when closing the press Visual inspection constantly make sure that the press ram after firing of the desired contact is no longer moved, because a #modellform half is of course not as mechanically resilient as a mold half.

The present invention is intended to provide a spotting device according to the preamble of claim 1 are created, in which lower mold and upper mold be brought into contact under specified pressure conditions and still a Damaging the lower or upper mold is not possible.

Based on the status addressed in the preamble of claim 1 In technology, this object is achieved according to the invention with the features indicated in the Claim 1 specified features.

In the case of the device according to the invention, you can enter the corresponding Make sure that the pre-setting of the anchorage devices is set when driving down for the first time of the ram, the upper and lower molds do not come into contact. You can then go through gradual adjustment of the stop devices a contact between the upper mold and lower mold - optionally with the interposition of a deformable intermediate layer - bring it down and is so safe that no damage to the lower mold or the upper form occurs. On the other hand, there is the contact pressure of the upper mold and the lower mold precisely reproducible specified, and ditei both ends of the plunger stop devices are provided, the load that is usually imbalanced during spotting can be Also do not tilt the tappet.

Advantageous further developments of the invention are set out in the subclaims specified.

In a device according to claim 1, large forces can also be used pick up reliably using the stop plates. Adjustment of the stop plates can be done very finely.

Another advantage of the device according to claim 2 is that it is simple Manufacturability of the anchorage devices and the possibility of simple, precise Adjustment of the stop plates by a revolving drive.

In a device according to claim 3, the plunger is in four places supported, which are symmetrical to its two vertical planes of symmetry. In this way, practically all reaction forces are kept away from the slide guides, which can occur when there is contact between the upper mold and the lower mold.

With the development of the invention according to claim 5, one becomes special good accessibility of the space between the ram and the lower clamping table of the spotting device obtain.

The stop plates can be exchanged individually if necessary or readjusted. They can be manufactured as standard components. Through the torque-absorbing rods are the stop plates in pairs in the direction of rotation set.

This means only a small additional structural effort a device according to claim 10, the stop plates can also be used for carrying and methods of support rods are used on which the upper mold into the press interior is pushed. This also gives you a very fine adjustment option for the vertical one Position of the upper mold when inserting.

In a device according to claim 19, the support rods can after after the onset of the upper mold can be removed, so that you can unhindered on the Upper form and the lower grain can work.

In a device according to claim 12, the upper mold can be without move into the press via the stop plates.

This movement can in a device according to claim 13 by a Retractable motor can be made.

In devices according to claims 14 and 15, the retraction motors if necessary, used one after the other for drawing in the upper mold and the lower mold will.

In a device according to claim 16, the lower form of a hoist initially protruding to the side from the device to the outside Support rods are deposited and then on these with the help of the pull-in motors be pulled into the press.

In a device according to claim 17, the support rods need the Worktop cannot be removed after use; you can simply contact the The initial table can be folded up, where they also do not interfere.

In a device according to claim 19, the plunger in his be firmly connected to the machine frame in the upper end position. This is particular advantageous when working in the space between the ram and the clamping table target.

With the development of the invention according to claim 20 it is achieved that the ones from the latches while holding the plunger and possibly ice from it carried tool applied forces distributed over a large area the traverse are transferred.

With the development of the invention according to claim 23 it is achieved that one can choose as blanks for the ## irungssäulen those whose radial dimensions are only slightly larger than those required for the guide pillar.

Another advantage of the device according to claim 23 is that that you can use one and the same guide columns for spotting devices that are designed for differently large contact pressure. To increase the closing force the press only need piston segments with a larger diameter and accordingly a larger diameter cylinder to be used. The one with their cylindrical Guide surfaces, on the other hand, need guide pillars that are to be machined very precisely in no way to be modified. Another advantage of the device according to claim 23 is that you can use the material of the piston segments regardless of the material of the Can choose guide pillars. While the latter particularly with regard to high mechanical strength of the guide column is selected, one can choose the material of the Select piston segments primarily with a view to good running properties.

The piston assembly can be very easy with the device according to claim 23 easy to accomplish.

With the development of the invention according to claim 26 it is achieved that the diameter of blanks for the guide pillars is also not in view on support rings for piston seal rings must be chosen larger than this for the Guide column itself is required.

In a device according to claim -7, the stop plates moved down one step each time the ram is retracted, so that automatically the distance between ram and clamping table in the next Close is reduced accordingly.

In a device according to claim 28, the stop plates can be used also move by hand in both directions.

The additional activation circuit can, for. B. one with solid Frequency running clock and a manually operated, resilient in the open position have biased switch, via which the clock with the control circuit for the stepper motor is connected. In this case one can over the length of the Period of time that the normally open switch was kept closed will specify the extent of the process of the connection plates. Instead, you can the activation circuit also has a presettable electronic counter and Eillen comparator have the type that the clock set on the counter Number of pulses is passed on to the control circuit of the stepper motor. in this way you can then each of the stop plates by a multiple of adjust normal feed increment.

With the development of the invention according to claim 29 it is achieved that the plug is used for visual inspection of the surface of the lower mold and Upper mold required lifting stroke is automatically stopped in each case. This simplifies not only the operation but also allows a faster work. The size of the return stroke is maintained regardless of the respective position of the stop plates.

In a device according to claim 30 is in any case ensured that the adjustment of the stop plates only takes place when the plunger-from the inside lifted off, so no great forces have to be overcome.

The invention is described below using an exemplary embodiment explained in more detail with reference to the accompanying drawing. In this show: 1 is a view of the front of a spotting press, with an upper one Cross member of the press frame cut in two vertical planes one behind the other is reproduced; 2 shows an axial section through the working cylinder on the left for moving and guiding the ram of the spotting press shown in FIG. 1; Fig. 3 shows a horizontal section through the working cylinder shown in FIG. 2, longitudinally the line III-III; FIG. 4 is a horizontal section through that shown in FIG Spotting press along line IV-IV.

The spotting press shown in the drawing has a lower work table 10, with which she sits on the floor, two connected to the clamping table 10 vertical guide pillars 12 and an upper cross member 14, which the two guide pillars 12th firmly connects to each other at the top. These parts together form the press frame. On the guide columns 12 run at the same time serving as guide bushes cylinders 16, which is the two ends of a plunger designed as an upper clamping table 18 wear.

As can be seen from FIG. 2, the end walls are the cylinders 16 sealed by seals 20 against the outer surface of the associated guide column 12, which are set by screwed pressure pieces 22 under tilting. The guide pillars In the case of the embodiment under consideration, 12 show half-height provisions 24, in which piston segments 26, 28 are inserted in a form-fitting manner. How best As can be seen from FIG. 3, the piston segments 26 and 28 penetrate along a line the bushing of the associated guide column 12 level with each other and are firmly connected to one another by bolts 30.

The piston segments 26 and 28 consist of a limaterial with good Running properties, e.g. B. from bearing bronze and run in a sliding fit on the inner wall of the cylinder 16 is located on the end faces of the piston segments 26 and 28, respectively a sealing ring 32, which is a cooperating with the inner wall of the cylinder 16, radially outer sealing lip 34, one covering the yaw segments and on them supported radial flange 36 and a radially inner annular body 38 has. The ring body 38 sits in a frictionally engaged manner on the guide column 12 and is supported at its free collar on support ring segments 40, 42, which are similar like piston segments 26, 28 by not shown in the drawing Screws are connected to one another and in an associated recess 44 of the guide column 12 sit tightly.

In the guide column 12 are two pressure medium channels 46 and 48 formed, which with an upper work space 50 and a lower work space 52 of the double-acting formed by the piston segments 26, 28 and the cylinder 16 Working cylinder are in communication.

As can be seen from Fig. 2, the plunger 18 is on the cylinders 16 welded in place and is thus moved up or down together with the latter, when the work space 50 is pressurized, or the work space 52 with Pressure is applied or both working spaces 50, 52 with the pressure-free storage container are connected for hydraulic oil, so that the tappet 18 is under its own weight can run down.

As FIG. 1 shows, the plunger 18 is T-shaped on its underside Grooves 54 are provided into which the D-shaped heads of clamping bolts are inserted can, with which an upper mold is to be attached to the plunger 18.

The plunger 18 is also provided with cylindrical receptacles 56 and threaded bores 58 for the detachable attachment of retractable motors, as later in the description of the lower hat clamping table 10 will be explained in more detail.

In the top of the plunger 18 two T-shaped grooves 60 are provided, and the upper cross member 14 carries two aligned T-shaped latches 62 which are in the in the position shown in the drawing can be inserted into the grooves 60 and then can be locked in the latter by turning 900. The latches 62 hang Support disks 64 fixedly connected to them via large diameters at.

the upper traverse 14. The support disks 64 each carry one radial actuation arm 66. An actuation rod 68 is at its ends via pivot pins 70 connected to the actuating arms 66, uo that the bolt 62 only moves together can be. The effective length of the actuating rod given by the pivot pins 70 68 corresponds to the distance between the axes of the support disks 64, so that the actuating arms 66, the actuating rod 68 and the one between the axes of the bolt 62 Part of the upper cross member 14 together form a parallelogram linkage.

A piston rod 72 engages one of the hinge pins 70 double-acting servomotor 74, the cylinder of which is articulated via a pin 76 is connected to the upper cross member 14. By pressurizing the one or of the other of the working spaces of the servomotor 74 can thus the latches 62 between the insertion position shown in the drawing and the opposite at 900 rotated holding position are moved. The plunger 18 hangs in its upper end position on the latches 62, so work can be done in the space between the plunger and the lower one Clamping table, in particular reworking the tool 7 is safe be performed.

The fixed, lower clamping table 10 has a plurality of T-shaped Grooves 78 for receiving the heads of clamping bolts, with which a lower grain is confirmed on the clamping table 10. There are cylindrical receptacles 80 and threaded holes 82 is provided in order to be able to releasably attach pull-in motors 84 to the clamping table 10. These have a cylinder that can be inserted into the receptacle SO and one on the cylinder head fastened flange 86 with through-holes for fastening bolts 88.

The end of the piston rod of the pull-in motors 84 carries a vertical one aligned slide 90, which with its free end over the top of the Clamping table 10 protrudes upwards.

In the transverse direction a little outside the point where if the slide 90 is located when the retractor motors 84 are used, they are via pivot pins 92 and joint sleeves 94 support rods 96 articulated on the clamping table 10, the upper edge of which is aligned with the upper edge of the clamping table. The support rods 96 are so between a rest position shown on the left in Fig. 1 and in Fig. 4 and bucket in Fig. 1 Swiveling working position shown on the right.

To pull in a lower grain on the lower work table 10 will be the roller bars of the retraction motors 84 fully extended. Then click on the unfolded Support rods 96 placed on the undersize (e.g. using a crane or a forklift). Then the piston rods of the pull-in motors 84 are through appropriate pressurization retracted again, and at this movement take the slide 90 with the undersize and move them to the Starting table 10 up. To move the lower mold further on the clamping table 10 are placed on the slide 90 after moving back Arne 98, which are parallel run towards the axis of the piston rod into the space between the ram and the clamping table. If desired, the slide 90 can of course also be permanently connected to a corresponding one to be provided when linear pulling motors with a correspondingly enlarged working stroke be available.

to limit the closing movement of the plunger 18 are four threaded spindles 100 is provided, which at the corners of the clamping table 10, the ram 18 and the traverse 14 are arranged. The lower ends of the lead screws 100 are About radial bearings 102 and as thrust bearing washer reproduced axial bearings 104 in Tensioning table 10 stored. The upper ends of the screw spindles 100 are through radial bearings 106 stored in the upper cross member 14 and carry inside the box section formed traverse 14 horizontal chain wheels over which an endless chain 108 runs.

Leash of the threaded spindles 100 has an extension 110, which a Bevel pinion 112 carries. This meshes with a further bevel pinion 114 that of the output shaft of a reduction gear 116 is carried. sense input shaft this reduction gear is with an electric stepper motor 118 and at the same time with one as a position provider serving revolution counter 120 connected.

Aut each of the threaded spindles 100 runs with a corresponding one Stop plate 122 provided with a threaded hole.

To fix their angular position, the two are in front of and behind one of the guide columns 12 lying stop plates 122 each by a rod 124 connected to each other.

For setting the same heights of the stop plates 122 above the clamping table 10, which only occurs when the press is set up and, if necessary, at long intervals is required, the stop plates 122 are so long by the stepping motor 118 moved down until the first of the stop plates 122 on the top of the suEspaentisches 10 strikes. Then the chain 108 is relaxed and from the end of the threaded spindles arranged sprockets removed. By inserting a tool in transversal 'bores 126, which are provided in the thread-free upper portion of the threaded spindles 10t, and by manually turning the threaded spindles 100, the remaining Stop plates 122 separately also in contact with the top of the clamping table 10 lead. Then the chain 108 is put back on and tensioned. By appropriate When the stepping motor 118 is energized, the stop plates 122 are raised uniformly.

The stop plates are used for testing and broaching a tool 122 initially adjusted to such a height, that upper form and the lower mold when the ram 18 approaches the stop plates 122 with certainty do not touch yet 0 Then the press closes, and every time it closes the stepping motor 118 is energized so that the hash plates 122 a little be driven down.

After each closing and reopening, it is determined visually whether the lower mold and the upper mold have touched.

This can e.g. B. using a color-releasing flexible fabric or a permanently deformable intermediate layer. As well as a LonXkt between The lower shape and upper shape are determined, the excitation of the stepping motor 118 interrupted, and the lower mold and upper mold are used to rework the workpiece quite apart.

To set the opening stroke that occurs with the respective shape of the lower and upper mold is required to inspect the mold surfaces is a rectangular cross-section rod 128 by means of a clamping screw 130 attached to one of the stop plates 122 so as to be vertically adjustable. She is in Arranged away from a light barrier 132 carried by the plunger 18, which the pressure medium supply interrupts to the upper working space 50 via the associated control valve, as well as its light beam is no longer interrupted by the rod 128. At the same time, the Stepping motor 118 energized using the output signal of light barrier 132 so that that the stop plate 122 are displaced a small distance downwards. Now the plunger can be activated by pressing the appropriate Control buttons the press can be lowered again.

To support the upper mold when pulling into the ram 18 are the Stop plates 122 at their inner end with open towards their top Bores 134 are provided so that on support rods 136 inserted into them, the upper mold can be pushed smoothly into the interior of the press.

The same pull-in motors can be used for this as for the Retraction of the lower mold. The support rods 136 protrude beyond the press to the outside, so that the upper mold can be placed on it by a crane. To work with the spotting press, the support rods 136 are then removed again.

You can so using the stop plates 122 and to their Drive provided threaded spindles 100 the top shape with respect to the ram 18 as well well-defined to move small distances and has upper forms of different heights a vertically adjustable support rod assembly.

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Claims (30)

Spotting device claims 1. Spotting device with a frame, which has two vertical guide pillars, with one on the guide pillars slidable plunger and with a plunger drive, which by protruding sections of the guide columns formed pistons and cooperating with these, firmly with having one end of the plunger connected cylinder, gekena marked by two adjustable impact devices acting on the ends of the plunger (18) and on the frame (100, 122). 2. Apparatus according to claim 1, characterized in that the stop devices Stop plates with threaded holes running on threaded spindles (100) (122) have. 3. Device according to claim 2, characterized in that each of the Stop devices two threaded spindles (100) wld two stop plates (122) has, which on both sides of the guide column assigned to the considered end of the plunger (12) are arranged. 4. Apparatus according to claim 2, characterized in that the threaded spindles (100) penetrate the plunger (18) in the vicinity of each of its corners. 5. Device according to claim 3 or 4, characterized in that the stop plates (122) assigned to one end of the ram by a torque-absorbing one Rod (124) are connected. 6. Device according to one of claims 2 to 5, characterized in that that the threaded spindles (100) are driven synchronously. 7. Apparatus according to claim 6, characterized in that the one Ends of the threaded spindles (100) each one wear sprocket, and that an endless chain (108) runs over the Eettenräder. 8. Apparatus according to claim 7, characterized in that the drive (112 to 118) for the threaded spindles (100) on the upper end of one of the threaded spindles (100) works. 9. Device according to one of claims 6 to 8, characterized in that that with the drive (112 to 118) for the threaded spindles (100) a position controller (120) is coupled. 10. Device according to one of claims 2 to 9, characterized in that that in inner ends of the stop plates (122) at each of the ram ends a support rod (136) to assist a mold or tool in being drawn in is arranged in the device. 11. The device according to claim 10, characterized in that the Support rods (136) are detachably connected to the stop plates (122). 12. Apparatus according to claim 10 or 11, characterized in that that the support rods (136) from the corresponding receptacles (134) of the stop plates (122) protrude with their lateral surface upwards. 13. Device according to one of claims 10 to 12, characterized in that that the plunger (18) has receptacles (66) for retractable motors. 14. The apparatus according to claim 13, characterized in that the Retractable motors are releasably attached to the plunger (18). 15. Apparatus according to claim 15 or 14, characterized in that that a fixed #aufspanntisch (10) also received (80) for the detachable having a single drive motor (84). 16. The device according to claim 15, characterized by the fixed clamping table (10) attached support bars (96) for supporting a mold or a tool when pulling in. 17. The device according to claim 16, characterized in that the Support rods (96) pivotable about a vertical axis on the fixed clamping table (10) are appropriate. 18. Device according to one of claims 2 to 17, characterized in that that the threaded spindles (100) rotatably in the lower stationary iufspanntisch (10) and an upper cross member (14) of the frame are mounted. 19. Device according to one of claims 1 to 18, characterized in that that the plunger (18) in its upper side rotary locking recesses (60) and the upper traverse (40) of the frame carries rotatable bolts (62) which together are movable by a locking drive (74). 20. The device according to claim 19, characterized in that the Latches (62) firmly connected to them and resting on a surface of the traverse (14) Wear support washers (64). 21. The device according to claim 20, characterized in that of the top of the support disks (64) actuating arms (66) are carried, which are articulated with an actuating rod (68), and that the working cylinder trained locking drive (74) engages the actuating rod (68). 22. The apparatus according to claim 21, characterized in that the Working cylinder (74) is articulated (76) at one end to the cross member (14) and on the other end engages one of the hinge pins (70) via which the actuating rod (68) is connected to the retainer arms (66). 23. Device according to one of claims 1 to 22, characterized in that that the piston consists of two piston segments abutting one another in a radial plane (26, 28), which are detachably connected to one another and in a recess (24) of the guide column (12) are used. 24. The device according to claim 23, characterized in that the Piston segments (26, 28) made of a material with good running properties are uder wear an appropriate surface layer. 25. Apparatus according to claim 23 or 24, characterized in that that on the continuous end faces of the piston segments (26, 28) each have a radial Flange (56) of a lip seal (32) rests, over which the outer sealing lip (34) is connected to an inner ring body (38) of the seal. 26. The device according to claim 25, characterized in that the End of the ring body (38) is each supported on a support ring a>, which in a radial plane on abutting support ring segments (40, 42) which are releasably connected to one another and in an associated recess (44) of the Sit in the guide column (12). 27. Device according to one of claims 6 to 26, characterized in that that the drive for the threaded spindles (100) has a stepping motor (118), which is activated for one step during the backward stroke of the plunger (18). 28. The device according to claim 27, characterized by a by hand operable separate activation circuit for the stepping motor (118). 29. Device according to one of claims - to 28, characterized by an adjustable position transmitter (128, 132 #, whose relative to each other movable Parts are fixed on one of the stop plates (122) or on the plug (18) and the return stroke movement of the plunger (18) can be controlled by its output signal. 30. Apparatus according to claim 29 in conjunction with claim 27, characterized characterized in that the stepping motor (118) also by the output signal of the Position transmitter (128, 132) is controllable.