EP1048374A2 - Spring coiling arrangement, in particular for spring coiling machines - Google Patents

Abstract

In a spring winch device for producing right-hand or left-hand helical coil springs made of wire with wire feed rollers (12), a wire guide (16) and two winch apparatuses (30; 32), each of which has a slide guide body (36, 38) with a slide (40, 42 ), each slide guide body (36, 38) can be pivoted at its end facing away from the wire guide (16) about a pivot axis (48, 50) perpendicular to the wire guide axis (34). Both winches (30, 32) are on different sides of the central plane (MM), each with a drive (64, 68; 66, 70) for moving the slide (40, 42) and a cam mechanism (88) controlled by a cam (88) 90,98,106; 92,100,108) for pivoting the slide guide body (36,38). A common cam (88) with two control sections and at least one latching section is assigned to both cam drives (90, 98, 106; 92, 100, 108). Each control section serves to initiate control movements in one of the cam mechanisms, while the detent section (s) does not initiate / initiate a control movement in the cam mechanisms. By turning the cam disc (88), a control section is switched on to the associated cam gear, while the other cam gear rests on the latching section, the controlled cam gear interacting with the drive for the movement of one of the slides (40, 42) in a program-controlled manner while the drive of the other Slide is turned off.

Description

The invention relates to a fader winch device, in particular for Spring coiling machines, for the production of either right-hand or left-hand winding Wire coil springs.

In a known spring winch device for spring winch machines (DE-PS 896 186) two winch tools are used, which are driven by one of one Cam Indirectly controlled levers are coupled to each other in a motion-locked manner. One slide is on one side of the wire guide and the other slide is open the other side of the wire guide, with both sliders on one of them common tool plate are guided linearly. Should this known device be switched in order to produce springs with a different wind direction, it is necessary replace the existing winch with another winch, as for springs different wind direction different spring winch devices are used have to.

In another known spring winding machine (DE-OS 23 10 174) are two Winch apparatuses each provided with a winch tool, the winch tool in concerned winch apparatus by means of a slide and a slide guide linear against the Exit point of the wire on the wire guide is adjustable. In addition, each of the two Winches around a bearing axis running transverse to the axis of the wire guide pivotally attached, which is located on the end section facing away from the wire guide of the slide guide body. This known spring winch device enables that each tool moves linearly and pivots at the same time and thus both function an inner as well as an outer wind tool can be used. It is a change in the wind direction is possible without the entire winch must be replaced. However, since no control means are provided to the two To be able to move winch tools against each other during spring production is one Production of form springs is not possible with this known device.

A winch device that is not only for the production of either right-hand or left-hand coil springs can be used, but also for Generation of acylindrically shaped coil springs is suitable is described in DE-GM 92 13 164 described. Two winches are also used, each one Has carriage guide body in which a carriage is slidably arranged so that a winch tool connected to the carriage relative to the wire exit point of the wire the wire guide is linearly movable. Each sled guide body is on its own the end area facing away from the wire guide about a perpendicular to the wire guide axis and parallel to a central plane running through the wire guide axis Swivel axis swiveling, with both winches on different sides of this Middle plane are arranged. Each of the two winches has its own cam mechanism assigned to the one sled in front of the carriage in its guide and pushes back, while on the other winch it pushes the carriage guide body back and forth panned and both movements are program-controlled to each other. Should now with this known winch device a change in the wind direction to be generated Coil springs take place, however, is the implementation of a plurality of mechanical Conversion work required, in particular a change in the kinematic transmission between Cam and winch as well as a change in facilities on the Winch apparatus itself is required, which is still relatively complex and cumbersome.

From DE-OS 198 25 970 a spring manufacturing device is known in which two Tool units are used, each of which is attached to a plate which in Wire guiding direction sits movably on another plate, which in turn perpendicular to Wire guide direction can be moved. This means that each tool unit can be divided into two Coordinate directions perpendicular to one another are moved independently of one another be what allows the tip of the tool that carries it to be any point can start. In this known device is a change in the spring direction possible without the implementation of noticeable remodeling equipment and can essentially by changing the program control. However, this requires known spring winch the use of four independently working Servomotors and a large number of superimposed and relative to each other movable individual elements, which means a very large effort.

Proceeding from this, the invention is based on the object of a spring winch device to provide the type mentioned at the outset, in which the change in the wind direction of the generated springs possible while largely avoiding mechanical conversion work is, and yet has a relatively simple structure.

According to the invention, this object is achieved by a spring winch device, in particular for spring coiling machines, for the production of either right-hand or left-hand winding Coil springs made of wire, with feed rollers for conveying the wire along one Wire guide axis through a wire guide, with two winches, each one Has carriage guide body in which a carriage is slidably arranged so that a winch tool connected to the carriage relative to the wire exit point of the wire the wire guide is guided in a linearly movable manner, with each slide guide body on its End area facing away from the wire guide about a perpendicular to the wire guide axis and directed parallel to a central plane running through the wire guide axis Swivel axis is pivotable, both winches on different sides of this Arranged in the middle plane, each winch apparatus has a drive for moving the carriage and a cam mechanism controlled by a cam for pivoting the Carriage guide body is assigned around the pivot axis, the cam gears both winches share a common one, controlled by a program-controlled motor pivotable cam with two control sections and at least one Resting section is assigned, each control section for initiating Control movements in one of the two cam gears and each locking section for initiation no control movements in the cam gear is designed, and by turning the Cam each one of the control sections for the manufacture of coil springs in one Wind direction switched on to the associated cam gear to control it can be while the other cam gear on one or the locking portion (s) abuts, and wherein the driven cam mechanism with the drive for the movement of a the slide interacts programmatically while driving the other slide is deactivated.

In the spring winch device according to the invention is given by the motor Mobility of each tool holder in two directions of movement makes it non-circular Springs possible, a reduced adjustment effort and the repeatability of Settings guaranteed and an automatic winding of the spring without manual Intervention for the first turn feasible. By using one of the two Common cam plate assigned to cam gear, which for switching to one or the other cam gear only has to be turned by a certain angle is the Conversion effort to change from right to left winds minimized, since only that individual tool settings must be carried out on the tool holder.

In addition, there is also a spring winch device according to the invention increased rigidity of the overall arrangement by a more favorable flow of force and the increased assembly and maintenance effort for the belt drive, such as the arrangement the DE-GM 92 13 164 is required. It is also the case with the invention Spring winding machine possible, a constant load torque over the entire Spring diameter range (with the same wire diameter and related to the Forming forces) by using a specially calculated curve law.

The cam disc used in the invention, common to both cam gears to the fact that a total of only three servomotors are to be provided and therefore with three Axes the entire basic principle of spring winding is covered. You can reach everyone Advantages only by using a third motor, without the use of another Motors would be required, as in the known spring winch device according to DE-OS 198 25 970 is used. In addition, this can also be done with this prior art used complicated arrangement one above the other and relative to each other in Carrying tables for the tool carrying devices and which can be moved in different directions the, also quite complicated connection mechanism on the one table, which at one Moving a second table to move two more tables is required be completely dispensed with.

The individual motors for driving the common cam as for the two Drives for moving the slides are via an electronic program control coupled with each other, which ensures that the for winding springs in one The direction of the wind for each motor used is program-controlled, precisely the movements perform, which are required for the manufacture of the desired spring shape.

In an advantageous embodiment of the invention, the cam mechanism works one at a time Winch apparatus with the drive for the movement of the carriage of the other Winches together program-controlled, whereby coil springs become one Have the wind direction established in the two-finger system. Should other people's feathers Wind direction will be generated, the cam gear of the other Winch apparatus with the other drive for the linear movement of the slide interconnected.

If the spring winch device according to the invention the forming process when the Causing wire in the one-finger system is preferably the cam mechanism of a winch with the drive for the movement of the carriage of the same winch coupled programmatically, i.e. one winch is in use while the other Winch is inactive.

Should coil springs with a different wind direction be produced in the single-finger winch system then the cam mechanism of the other winch with the drive is preferred program-controlled coupling for the movement of the sled in this winch apparatus.

In the spring winch device according to the invention can be used as a drive for the movement of the In principle, any suitable type of drive can be used with every winch. However, it is very particularly preferred if as a drive for the movement of the carriage Each winch has a cam that can be rotated by a program-controlled motor is provided, the cam movement is forcibly transmitted to the carriage. This has the great advantage that the occurring due to the positive control Weight and acceleration forces the accuracy of the movement of the slide or tool holder.

The axis of rotation is particularly preferred in the spring winch device according to the invention the cam plate common to the two cam mechanisms is arranged so that they Extension of the wire guide axis cuts vertically and lies in the middle plane. This allows a mirror-symmetrical arrangement of the cam mechanism on both sides of the Reach the mid-plane, resulting in the same loads in both wind directions of the springs each activated cam gear leads.

Likewise preferred in a spring winch device according to the invention the winches are arranged mirror-symmetrically to the wire guide axis, whereby - again preferably - are mirror-image to each other.

In another preferred embodiment of the invention there is between the winch apparatus and symmetrical to the wire guide axis in its extension and at a distance of the wire exit point attached a guide plate on both of them Sides facing winch apparatus each have a guideway on which the facing end of the slide guide body of the relevant winch slides.

Fig. 1 eine prinzipielle Vorderansicht einer erfindungsgemäßen Federwindeeinrichtung, eingerichtet zur Herstellung rechtgewundener Schraubenfedern im Zweifinger-Windesystem;

Fig. 2 einen vertikalen Längsschnitt entsprechend Linie II-II in Fig. 1;

Fig. 3 einen vertikalen Längsschnitt entsprechend Linie III-III durch den Schwenkantrieb der in Fig. 1 dargestellten Federwindeeinrichtung;

Fig. 4 einen Schnitt entsprechend Linie IV-IV durch eine Einzelheit in Fig. 1;

Fig. 5 die Federwindeeinrichtung aus Fig. 1, eingerichtet zur Herstellung linksgewundener Schraubenfedern;

Fig. 6 eine Ansicht der Federwindeeinrichtung nach Fig. 1, aber eingerichtet zur Herstellung rechtgewundener Schraubenfedern im Einfinger-Windesystem, und

Fig. 7 einen Schnitt entsprechend Linie VII-VII durch den oberen Windeapparat der in Fig. 6 dargestellten Federwindeeinrichtung.

In the following the invention is explained in principle by way of example by means of the drawing. Show it:

Figure 1 is a schematic front view of a spring winch device according to the invention, set up for the production of right-hand coil springs in the two-finger winch system.

Figure 2 is a vertical longitudinal section along line II-II in Fig. 1.

3 shows a vertical longitudinal section along line III-III through the swivel drive of the spring winch device shown in FIG. 1;

4 shows a section along line IV-IV through a detail in FIG. 1.

FIG. 5 shows the spring winch device from FIG. 1, set up for producing left-handed coil springs;

Fig. 6 is a view of the spring winch device of FIG. 1, but set up for the production of right-handed coil springs in the single-finger winch system, and

Fig. 7 is a section along line VII-VII through the upper winch apparatus of the spring winch device shown in Fig. 6.

The exemplary construction details shown in the figures Spring winch device 10 is part of a spring winch machine (not shown) with one Not shown CNC-controllable servo motor-driven feed rollers 12 that have a wire 14 straight through a wire guide 16 into a wind station 18 move in the wire 14 by two winding tools 20 and 22, which are in the form of Winding fingers are carried out by two on a winch plate 26 of the spring winding machine Winches 30 and 32 fastened one above the other, depending on the position of the two Winding tools 20 and 22, formed into right-hand or left-hand coil springs, i.e. depending on whether a right-hand or a left-hand coil spring is produced should, the wire 14 is up or down with respect to the wire guide axis 34 distracted.

Each of the two above and below the wire guide axis 34 and one through this running center plane M-M arranged winch apparatus 30 and 32 consists of a Carriage guide body 36 or 38, on which a carriage 40 or 42 by means of a commercially available linear guide unit 43, the guide rail on the Slide guide bodies 36 and 38 and their guide carriages on the slide 40 and 42 are attached, is guided longitudinally. Each of the sledges 40, 42 carries on its End facing wire guide 16 a pivotable holder 44 or 46 fastened in it, in which the upper winch tool 22 or the lower winch tool 24 is fastened.

Each of the two slide guide bodies 36 and 38 is on the winch tool 22 or 24 facing away from the end region formed on a bolt 48 or 50 fixed to the frame Axis pivotally mounted on the winch plate 26. The tool-near end of each Carriage guide body 36 or 38 is rounded with a radius around the axis of the bolt 48 or 50. With these ends, both slide guide bodies 36 and 38 rest a coplanar guide plate 52 with lateral, the slide guide bodies 36 and 38 facing tracks 54 of a correspondingly designed, concave contour on both sides.

As can be seen from the sectional view in FIG. 2, the wire guide axis 34 in FIG opposite end region of the slide guide body 36 and 38 each in one Receiving hole a gear 60 or 62 centered, to each one program-controlled, intermittently forward and backward rotating servo motor 64 or 66 is flanged on the input side. With the drive shafts of the two gears 60 and 62 one control cam 68 and 70 connected in a rotationally fixed manner. On the cam 68 or 70 two rolls 72 and 74 each run, each on one, on the upper carriage 40 and lower Carriage 42 fastened bolts 76 and 78 are rotatably arranged (Fig. 2), whereby the Movement of the carriages 40 and 42 by the rotary movement of the control cams 68 and 70 is forced.

The spring winding machine is in the extension of the wire guide axis 34 in the winch plate 26 in a remote, perpendicular to the wire guide axis 34, with its central axis through it a further gear 84 extending and located in the central plane M-M flanged, at the entrance of which another CNC-controllable, intermittent forward and reverse servo motor 86 is attached. On the output side sits on gear 84 A disk-shaped control cam 88, designed as a bead curve, on each of the two Rolls 90 and 92 run positively, each on one, on each one on the Winch plate 26 of the machine fastened bolts 94 and 96 pivoted needle-bearing, angular, one-armed lever 98 and 100 are rotatably arranged. The two bolts 94 and 96 are on different sides of the drive shaft of the transmission 84 and in the same Distance from this, perpendicular to the wire guide axis 34, one above the other (Fig. 3).

One coupling articulated rod 106 and 108 is on the one hand by means of bolts 110 and 112 approximately in the middle of the lever 98 or 100 and on the other hand via bolts 114 and 116 on Slide guide body 36 of the upper winch apparatus 30 or on the slide guide body 38 of the lower winch 32 articulated.

The mode of operation of the spring winch device shown for the production of right-hand coil springs in the two-finger winch system with reference to the Figures 1 to 4 described:

For the form drive of the winch tool 20 of the upper winch apparatus 30 for adjustment the outer diameter of the spring during spring manufacture, the servo motor 64 is activated, which program-controlled the control cam 68 via the gear 60, intermittently forward and drives backwards. The radial movement of the cam 68 is via the rollers 72 transferred to the carriage 40 of the upper winch apparatus 30 and the upper winch tool 20 is linearly back and forth in a closer / front or further / rear oblique position moved relative to the wire exit point of the wire 14 on the wire guide 16.

The movement that is legally coordinated with the movement of the upper winch tool 20 of the winch tool 22 of the lower winch apparatus 32 is program controlled by the control cam 88 correspondingly driven by the servomotor 86 via the gear 84 given. The movement of the control cam 88 is transmitted via the rollers 92 on the pivotable lever 100 and further via the coupling articulated rod 108 on the lower slide guide body 38. This leads the slide guide body 38 with the Winding tool 22 of the lower winch 32 a positively controlled back and forth pivotal movement about the axis of the bolt 50 as a pivot center. The lower winch tool 22 is thus also in a front and rear position in Relation to the wire exit point on the wire guide 16 by means of the cam gear 88, 92 and 100 moves.

The winch tools 20 and 22 of the upper and lower winch apparatus 30 and 32, respectively doing so according to a constructively determined law (at least predominantly) at the same time postponed. The specially calculated curve laws of the two serve this purpose Control curves 68 and 88 in connection with the two program-controlled, intermittent forward and reverse rotating servomotors 64 and 86.

It should also be noted that the control curve 88 in addition to two control sections, which are for the Initiation of tax movements in one or the other of the two Cam gears are designed over certain areas of their circumference with two Locking sections is provided, d. H. over this range of rotation of the curve of the Control curve 88 in each case there is no control movement on the transmission members. In the case of Winding a coil spring to the right is the latching section of the control cam 88 for the upper one Winding device 30 responsible or effective, so here no swiveling movement around the Bolt 48 executes.

About the cam roller 90, the lever 98 and the coupling link rod 106 and their Connecting bolts 110 and 114, the upper winch apparatus 30 is also rigidly fixed.

Furthermore, it should also be noted that the CNC-controllable servo motor 66 of the lower winch apparatus 32 is switched off programmatically. However, he can automatic bending of the first wire winding by the lower winding tool 22 be used.

The changeover of the two winches 30 and 32 from one wind direction to the other Wind direction, e.g. B. from the right-hand winch shown in Figure 1 to that shown in Figure 5 Reordering for left winds is done from the machine control without any additional conversion work (from relocating the clipping dome and the Cutting tool of the machine).

The servomotors 64 and 66 move the upper or lower winch tool 20 or 22 in the furthest from the wire guide 16 retracted, rearmost position, while then the servo motor 86 the control curve 88 continues to turn until the locking section of the control cam 88 is now for the lower one Winch 32 takes effect. The subsequent setting of the initial diameter of one Shaped spring or the outer diameter of a cylindrical coil spring is then carried out by switching on both servomotors 64 and 66, which the winch tools 22 and 24 move legally to each other to the extent necessary. Then the Drive motor 64 of the upper winch apparatus 30 switched off or for automatic Bending the wire of the first spring turn used by the upper winding tool 20. The coordinated movement required to produce a left-hand coiled form spring of the winch tool 20 of the upper winch apparatus 30 is carried out by the servo motor 86 driven control curve 88. The transmission of the movement of the control curve 88 now takes place via the two rollers 90 to the pivotable lever 98 and further via the coupling joint rod 106 and the bolts 110 and 114 onto the upper slide guide body 36, which thereby back and forth about the axis of the bolt 48 as a pivot center pivots and thus moves the winding tool 20.

The linear movement of the lower winch tool 22 is carried out by the servo motor 66 driven cam 70 via the rollers 74 and the carriage 42.

The winch tool 20 of the upper winch apparatus 30 is now used in the manufacture left-hand wound spring body as the inner tool and the winding tool 22 of the lower one Winch apparatus 32 as an external winch tool; while for right-wing Coil springs the upper tool 20 as the outer winding tool and the lower Tool 22 serves as an internal winding tool ("inside" and "outside" corresponding to the terminology reproduced in DE-OS 2 310 174).

In Figures 6 and 7, the spring winch device for the production of right-handed Coil springs shown in the single-finger winch system.

In this one-finger winch device, the motor movement of the only one takes place Winding tool 120 in two directions of movement, as described below with reference to FIG Figures 1 to 7 is described in more detail.

The only turning tool 120 is on a holder 122 on the carriage 40 of the upper one Winch apparatus 30 fastened, the carriage 40 via a cam 68 and on Batzen 76 seated rollers 72 is forcibly guided back and forth. Cam 68 itself is intermittently forward and by the program-controlled servo motor 64 (Fig. 7) driven backwards via the gear 60. At the same time linear and oblique directional movement is still a program-controlled swivel movement of the upper Carriage guide body 36 around the axis of the pin 48 as a pivot center (or can respectively). This swiveling movement is controlled by a CNC-controllable servo motor 86 Transfer transmission 84 to a cam 88 (as shown in FIG. 3) and from there via two Rollers 90 positively controlled on the lever 98 pivotable on pin 94 and further via a Coupling joint rod 106 on bolts 110 and 114 on a slide guide body 36 of the upper winch apparatus 30.

The carriage 42 of the lower winch apparatus 32, which is inactive for the production here, whose Winding tool holder was removed via the servo motor 66 (as in Fig. 2) and the Move cam 70 to its retracted rear position.

By the previously described, controlled linear movement of the winding tool 120 over the carriage 40, which, however, in interaction with the controlled pivoting movement of the Carriage guide body 36 stands, the active surface of the winding tool 120 can be any Drive through the required course of movement.

The lower one is for the production of left-hand coil springs in the one-finger winch system Winch 32 in use, while the upper winch 30 is now inactive. The rectilinear movement of the winch tool, not shown, is now carried out by the servo motor 66 from over the cam 70, and the pivoting movement of the lower Carriage guide body 38 around bolts 50 from servo motor 86, which is the control cam 88 previously rotated so far that the rest area is now for the upper inactive winch 30 is responsible, via this control curve 88 on the lever 100 and from here on the coupling link 108 on the slide guide body 38.

In principle, left-handed coil springs can also be used with the winding tool 120 of the upper winch apparatus 30 are manufactured. All that is required is that the winch 30 of the servo motor 64 has been moved so far up that the winding tool 120 is now open the other side, ie above the wire guide axis 34 on the wire 14 and after works at the bottom, while for the previously coiled coil springs that Winding tool 120 engages on wire 14 below wire guide axis 34 and moves on moved up.

As can be seen from FIGS. 1, 5 and 6, the two winching apparatuses 30 and 32 arranged mirror-symmetrically to the wire guide axis 34 on the winch plate 26 and mirror-image to each other.

In all of the previously described wind processes, the separate control of the Winding tools are also not made of circular coil springs, or it is possible to wind feather shapes that have different wind radii within one feather turn have.

Claims (9)

Spring winch device, in particular for spring winch machines, optionally for production right-hand or left-hand coiled coil springs made of wire, with feed rollers (12) for Conveying the wire (14) along a wire guide axis (34) through a wire guide (16), with two winch apparatuses (30; 32), each of which has a slide guide body (36; 38), in which a slide (40; 42) is slidably arranged so that one with the slide (40; 42) connected winch tool (20; 22) relative to the wire exit point of the wire (14) from the Wire guide (16) is guided in a linearly movable manner, each slide guide body (36; 38) its end area facing away from the wire guide (16) by a perpendicular to the Wire guide axis (34) and parallel to one through the wire guide axis (34) extending center plane (M-M) directed pivot axis (48; 50) is pivotable, both Winches (30; 32) are arranged on different sides of this central plane (M-M), each winch (30; 32) has a drive (64,68; 66,70) for moving the carriage (40,42) and a cam mechanism (90,98,106; 92,100,108) controlled by a cam disc (88) for Swiveling the slide guide body (36; 38) assigned to the pivot axis (48; 50) is, the cam drives (90,98,106; 92,100,108) of both winches (30; 32) one common cam disc (88) which can be pivoted by a program-controlled motor (86) is assigned with two control sections and at least one locking section, each Control section for initiating control movements in one of the two cam mechanisms (90,98,106; 92,100,108) and each locking section to initiate no control movements in the Cam gear (90,98,106; 92,100,108) is designed, and by turning the cam (88) one of the control sections for producing coil springs in one Wind direction to the associated cam gear (90,98,106; 92,100,108) to it Control can be switched on while the other cam gear (90,100,108; 90,98,106) abuts the or a latching section, and wherein the driven Cam gear (90,98,106; 92,100,108) with the drive (64,68; 66,70) for the movement of a the slide (40; 42) interacts under program control, while the drive (66.70; 64.68) of the other carriage (42; 40) is switched off. Spring winch device according to claim 1, wherein the cam mechanism (90,98,106; 92,100,108) one winch apparatus (30; 32) each with the drive (64,68; 66,70) for the movement of the Carriage (40; 42) of the other winch (32; 30) is program-controlled cooperates. Spring winch device according to claim 1 or 2, in which as a drive for the movement of the Carriage (40; 42) for each winch apparatus (30; 32) one of a program-controlled motor (64; 66) rotatable cam (68; 70) is provided. A spring winch device according to claim 3, wherein the carriage (40; 42) of each winch apparatus (30; 32) on the rotatable cam (60; 70) is positively guided. Spring winch device according to one of claims 1 to 4, wherein the axis of rotation of the two Cam drive (90,98,106; 92,100,108) common cam (88) in extension the wire guide axis. Spring winch device according to one of claims 1 or 3 to 5, in which the cam mechanism (90,98,106; 92,100,108) of a winch apparatus (30; 32) with the drive (64; 66) for the Movement of the carriage (40; 42) of the same winch apparatus (30; 32) under program control cooperates. Spring winch device according to one of claims 1 to 6, in which between the Winches (40; 42) and symmetrical to the wire guide axis (34) in their extension and at a distance from the wire exit point, a guide plate (52) is attached, which a guideway on each of its two sides facing the winch apparatus (30, 32) (54) on which the facing end of the slide guide body (36; 38) of the concerned winch apparatus (30; 32) slides. Spring winch device according to one of Claims 1 to 7, in which the winch apparatus (30, 32) are arranged mirror-symmetrically to the central plane (M-M). Spring winch device according to one of Claims 1 to 8, in which the winch apparatus (30, 32) are mirrored to each other.

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