EP0464528B2 - Riveting device - Google Patents

Abstract

A setting device (1) for a self-tapping rivet (50) has, in a two- part housing, fittings which can grasp a tap shank (51) firmly against rotation and tension. In a first working position, the tapping procedure for the self-tapping rivet (50) is carried out and, in a second working position, the self-tapping rivet (50) is set and the closing head formed. During this process, the clamping jaws (8) move axially until the tap shank (51) tears off from the tapping head. The operations involved in tapping and riveting are carried out in different directions of rotation of a shaft (32). Tapping takes place in a first end position of the shaft (32) and the fixing of the tap shank (51) in the setting device (1) and the setting of the self- tapping rivet (50) take place in a second end position of the shaft (32). <IMAGE>

Description

The invention is based on a setting device for a self-drilling rivet with a housing and built-in housings that are non-rotatable and tensile grasp a drill shaft and the over a drive can be rotated.

Such devices are through the printing step EP 0 213 101 became known.

In the known device, the entire rotates Device and the torque for the Rotational movement of the drill is during the drilling process transmitted via form-fitting wings. A separate working position for clamping the drill shaft is not provided. Furthermore, the drive device is used to that the device does not rotate during the riveting process can. The fact that a longer axial section between the self-drilling rivet and the drive device can also rotate during the drilling process there are security risks.

The invention has for its object a To create device that is particularly simple and is safe to handle.

This object is achieved according to the invention resolved that the drill shaft across one a first end position of a shaft over a Drilling process in opposite rotational movement a second end position of the shaft in the setting device can be clamped and a riveting process in this Rotational movement can be ended and that the housing internals rotating and sliding jaws have covered in the setting device from a stationary guide sleeve for this purpose are arranged.

The setting device according to the invention thus has the main advantage that for clamping of the drill shaft and for setting the rivet Drive that can also be used for Drilling the opening for the rivet is used. Only the direction of rotation of the drive has to be changed will. This is with commercially available hand drills already planned many times, and so it is a particular advantage if the free shaft end the setting device according to the invention into the chuck without any special precautions of such a hand drill can be.

The setting device is in two working positions drivable, in one, a first Working position, the drilling process will be carried out can and in a second working position, at extended shaft, the drill shaft of the self-drilling rivet pulled and separated from the drill head becomes. Both in the drilling process and in When the rivet is placed, the drill shank becomes frictional held by the jaws.

The direction of rotation is in the second working position changed again, so the jaws up to the stop on the guide sleeve method. The jaws open and the broken drill shaft is ejected. Then the direction of rotation of the drive becomes again changed and a still undeformed self-drilling rivet with the drill shaft in the setting device introduced, the drill shaft is through a short actuation of the drive with the Clamped jaws.

This shows that with the invention Quick and easy setting device for self-drilling rivets can be handled. If the self-drilling rivet is clamped, the Move the shaft to the first working position, see above can be drilled with the setting device.

That the housing internals rotatable and displaceable Have jaws covered from a stationary guide sleeve for this purpose are arranged in the setting device, this has the advantage that the clamping process in Interior of the setting device takes place. The Occupational safety is based on such an arrangement improved.

Furthermore, the clamping jaws are preferred along a spring-loaded inner guide sleeve a conical surface of a conical sleeve.

This has the advantage of being simple a secure tension between the drill shank and jaws can always be reached. The Clamping jaws, three of which are preferred can grasp the drill shaft in an axial Don't skew displacement and glitches are avoided.

Form in a further embodiment of the invention the jaws, the inner guide sleeve, the Cone sleeve, a spiral spring and a support ring a jointly movable component, so the Clamping jaws on the one hand due to an axial displacement securely closed and on the other hand can be opened again quickly. The constructive Structure of such a device can be due to this principle of action can be considerably simplified.

In a further embodiment of the invention Component axially displaceable via an outer guide sleeve, the outer guide sleeve on one annular surface has a toothing and on the circumference of the outer guide sleeve is a thread over the axial length of this sleeve educated.

This has the advantage that with such a Build up not only the movable parts securely against each other can be moved, but the assembly of such a device will considerably simplified by using straight teeth the parts simply pushed axially into each other can be.

A section of the shaft has external teeth, those in the first working position in the Internal toothing of a support ring engages so that when the shaft rotates, this movement is safely transmitted to the support ring. As already mentioned, forms the support ring with the Jaws a component, so are the jaws smoothly by rotating the shaft twisted.

In a preferred embodiment of the invention the setting device consists of two screwed together Housing parts formed. This has the Advantage that the device both in the event of malfunctions as well as when replacing individual components is easy to open.

For moving the shaft from a first working position in a second working position manual actuation overcome a spring force will. This always shows which one is safe Working position yourself the invention Setting device is located.

If the setting device according to the invention a riveting process, so it is for example possible that at the free shaft end colored rings attached in axial spacing which indicate in which working position the setting device is located. About such visual display can be recognized whether the Clamping jaws rest against the guide sleeve, and the drill shank of a self-drilling rivet into the setting device can be introduced. Can too Measures should be provided during the introduction the drill shank of the self-drilling rivet in the Guide sleeve trigger a contact such that always the correct rotary motion on the drive of the Hand drill is set. The drill shaft is then rotatable and tensile by the jaws held when the drive is operated briefly. If the working position of the shaft is then changed, this allows drilling with the self-drilling rivet.

The setting device according to the invention corresponds thus all extended requirements that required in appropriate areas of application will. The setting device is easy to handle is easy to maintain and insensitive to faults and can also be used in conjunction with known Hand drills are used. By the simple construction, it is light in weight and it contributes to an improved one Occupational safety. Of course they can Moving parts of the setting device during the drilling process also arranged in this way in the stationary housing be that the guide sleeve also turns. This Embodiment is also part of the inventive concept.

Further advantages result from the description and the attached drawing.

Figur 1

eine erfindungsgemäße Setzvorrichtung in einer Schnittdarstellung mit an einer Führungshülse anliegenden Klemmbacken und in einer ersten Arbeitsposition;

Figur 2

eine erfindungsgemäße Setzvorrichtung in einer Schnittdarstellung mit einem eingeführten Selbstbohrniet und in einer ersten Arbeitsposition zum Durchführen eines Borhvorganges;

Figur 3

eine erfingungsgemäße Setzvorrichtung in einer Schnittdarstellung mit einem abgebrochenen Bohrerschaft und in einer zweiten Arbeitsposition.

The invention is illustrated in the drawing and is explained in more detail with reference to exemplary embodiments in the drawing. Show it:

Figure 1

a setting device according to the invention in a sectional view with clamping jaws resting on a guide sleeve and in a first working position;

Figure 2

a setting device according to the invention in a sectional view with an inserted self-drilling rivet and in a first working position for performing a boring process;

Figure 3

a setting device according to the invention in a sectional view with a broken drill shaft and in a second working position.

The individual figures of the drawing show partially highly schematic of the invention Subject and are not to scale understand. The objects of the individual figures are shown partially enlarged, so that their structure can be shown better.

Figure 1 shows a setting device 1 for a Self-drilling rivet consisting of a first housing part 2 and a second housing part 3. The first housing part 2 and the second Housing part 3 are via a threaded section 4 releasably connected.

In the opposite of the second housing part 3 The end of the first housing part 2 is centric provided hole 5 provided that a thread 6th having. In the thread 6 is a guide sleeve 7 screwed in. On the inside in the first Housing part 2 facing end of the guide sleeve 7 join jaws 8, the with one end on the end face of the guide sleeve 7 rest. The one pointing into the first housing part 2 End face of the guide sleeve 7 has for the jaws 8 the function of a stop and limits the maximum axial displacement the jaws 8 in one direction. The jaws 8 are guided in a cone sleeve 9, the one towards the free end of the first housing part 2 has tapering passage 10. In the rotationally symmetrical conical sleeve 9, the passage 10 is arranged centrally. in the Passage 10 is an inner guide sleeve 11 arranged, which connects to the jaws 8. The pointing to the jaws 8 End face of the inner guide sleeve 11 lies on the end faces of the jaws 8. The inner one Guide sleeve 11 is with a blind hole 12 provided whose diameter is so large that at the ends of the jaws 8 at the transition a recessed to the inner guide sleeve 11 Paragraph 13 is created. On the shoulders of the heel 13 is a bolt 14 partially on the a spring 15 which is supported on the bottom of the borehole, is pressed to the shoulders of paragraph 13.

The inner guide sleeve 11 points to that of the jaws 8 end pointing one Pin 16 on an annular extension 17 ends. At the ring-shaped extension 17 closes a tapered conical surface 18 which, as shown in FIG. 1, always from the inner surface of the passage 10 over the entire length is spaced apart.

The annular extension 17 serves as a support for a spiral spring 19, the one hand the pin 16 encased and on the other hand with the other End rests on the base of a support ring 20. The support ring 20 is with the cone sleeve 9 in screwed in a way that the thread 21 web 21a shown in cross section in the figure engages its entire length in the conical sleeve 9.

About the screwing of the cone sleeve 9 with the support ring 20, the coil spring 19 is biased and presses the inner guide sleeve with great force 11 against the jaws 8.

The cone sleeve 9 is seen in cross section a rectangular recess 22 is provided, which are ring-shaped around the conical sleeve 9 extends and is limited by the support ring 20. In the recess 22 are L-shaped in cross section, bearings 23, 24 designed as sleeves, the as a sliding bearing an outer guide sleeve 25 from the conical sleeve 9 spaced.

On the circumference of the outer guide sleeve 25 over the entire length of the outer guide sleeve 25 a thread 26 is provided which is in a thread 27 of the first housing part 2 engages. The outer Guide sleeve 25 points along the section, which is not in the recess 22, one over the Full axial length of toothing directed inwards 28 on. The teeth 28 are a spur gear. The support ring 20 has an outer annular surface 29 spaced from the toothing 28.

The support ring 20 is in the center with a Provide bore that an internal toothing 30th and which in Figure 1 with an external toothing 31 is engaged, the sections is formed on a shaft 32. The external toothing 31 is in the end region of the shaft 32 attached over the circumference of the shaft 32 and extends over a short section in the axial direction.

The shaft 32 is rotatably supported in the second housing part 3 via slide bearings 33, 34. The shaft 32 can be rotated in the direction of the arrow 35 and can be clamped with its free shaft journal 36 into the chuck of a drilling device not shown in FIG. 1. The shaft 32 is axially displaceable in the direction of arrow 37. 1 shows one of two possible end positions of the shaft 32. In this first end position, ie in the first working position, the external toothing 31 of the shaft 32 engages in the internal toothing 30 of the support ring 20. In a second end position, ie in the second working position, the shaft 32 engages in the external toothing of pinions after an axial displacement 38, 39, which are rotatably fastened by screws 40, 41 to the second housing part 3. The external toothing of the pinions 38, 39 simultaneously engages in the toothing 28 of the outer guide sleeve 25. The toothing of the pinions 38, 39 is indicated in the figure by reference numerals 42, 43.
In the figure, the shaft 32 has in the middle part of the second housing part 3 an annular shoulder 44 which is provided as a support for a spiral spring 45 which is supported with its other end on an end face of a sleeve 46 which can be screwed into the second housing part 3. The sleeve 46 carries the slide bearing 34. The shoulder 44 limits the axial displacement of the shaft 32 in the direction of the arrow 37 in both directions.

Figure 2 shows a setting device 1 for a Self-drilling rivet, in which a self-drilling rivet 50 in the Device is inserted and the setting device 1 keeps the self-drilling rivet torsion and tensile. The cone sleeve 9 is slightly axial to the second housing part 3 moved out, whereby the Klemmba ken 8 due to the spring force of the coil spring 19th via the inner guide sleeve 11 to the guide sleeve 7 be moved until a drill shank 51 firmly clamped by the jaws 8 is held. Between the end faces the jaws 8, which point to the guide sleeve 7, and the guide sleeve 7 is a free space 52 trained.

Now the shaft 32 in the arrow direction 53, for example driven by a hand drill and the shaft 32 is in an axial Positioning where they are in the internal toothing 30 of the support ring 20 engages (first working position), so the support ring 20 over the shaft 32 driven. In that the support ring 20th is firmly screwed to the cone sleeve 9 about the rotational movement of the support ring 20 also the cone sleeve 9 is rotated and thus also the jaws 8, which are non-rotatable hold the drill shaft 51. With the in FIG Working position shown can be with the self-drilling rivet 50 the drilling process can be carried out. Figure 3 shows a setting device in a second Working position with broken drill shaft 51. After drilling a hole with the setting device 1 in the first working position, as shown in FIG. 2, was drilled and after the self-drilling rivet 50 set and the closing head formed , the drill shaft 51 is at a predetermined breaking point broken off between drill head and drill shank been.

The drill shaft 51 is due to an axial Displacement of the cone sleeve 9 in the direction of the second housing part 3 from the drill head demolished a predetermined breaking point. Over the jaws 8, the drill shaft 51 is so far into the Setting device 1 retracted until the resulting Tensile force the connecting force of the drill head to drill shaft exceeds and thereby a tear between these parts sets. The cone sleeve 9 becomes axial in this process second housing part 3 moved out by the shaft 32 manually into a second working position moves. The change of working position is achieved one, for example, via a train on the hand drill. The shaft 32 is thereby withdrawn. About an axial displacement described in this way the shaft 32 snaps with its external toothing 31 into the toothing 42, 43 of the pinion 38, 39. If the shaft 32 is then in the direction of the arrow 54 driven, the pinions 38, 39 and engage in the toothing 28 at the same time which is a spur gear. The Tooth 28 is, as already described in FIG. 1, on one facing inside the device Surface of the outer guide sleeve 25 attached. The outer guide sleeve 25 is however also engaged with the thread 26, which is such is designed that with a rotation of the pinion 38, 39 in the direction of arrow 54 through the shaft 32 outer guide sleeve 25 moved in the direction of arrow 55 becomes. In Figure 3 is the maximum Displacement of the outer guide sleeve 25 shown.

Now the broken drill shaft 51 be ejected from the setting device 1, so is the shaft 32 in that shown in FIG to drive the second working position in the direction of arrow 56, whereupon the cone sleeve 9 in the direction of arrow 57 moves axially. The conical sleeve 9 can be axially maximal so far in the direction of arrow 57 until the end faces of the jaws 8 on the guide sleeve 7, as shown in Figure 1, to the system come. Due to the location of the jaws 8 on the guide sleeve 7, the spiral spring 19 pushed back, and give the jaws 8 the drill shaft 51 free. The spring 15 then presses over the Bolzano 14 the drill shaft 51 from the Setting device 1.

Now the drill shaft 51 should be new setting self-drilling rivets 50 into the setting device 1 are introduced, this insert is in make a position of the jaws 8, as shown in Figure 1. Is the drill shaft 51 without Resistance is inserted into the blind bore 12 been by the bolt 14 with the spring 15 has been moved towards the second housing part 3, the shaft 32 is then in the second working position over which the pinions 38, 39 are to be driven. If the shaft 32 is then, as in 3, briefly in the direction of arrow 54 driven, the cone sleeve 9 is slightly moved to the second housing part 3, like this also shows Figure 2. With the rotating movement in The direction of arrow 54 according to FIG. 3 becomes the drill shaft 51 through the clamping jaws 8 of the conical sleeve 9 jammed by the spring force inner guide sleeve 11 towards the guide sleeve 7 moves and at the same time a free space is formed 52, as shown in Figure 2. Was in the described way of clamping the Drill shaft 51 made in the setting device 1, so the shaft 32 can be in a first working position be moved as the figure 2 shows. Then the shaft 32 in the direction of arrow 53 (Figure 2) driven, so when clamped Self-drilling rivet 50 start the drilling process again.

Figures 1 to 3 show no connection of the free shaft shaft 36 to a commercially available Drill, and it's in the figures too no anti-rotation lock from the drill the setting device 1. Activities, like a standard drill press to be used with the setting device 1 and like an anti-twist device between the drill and the setting device 1 must be known to the expert, so that no further explanations are given here have to. The drill shaft can also 51 profiles exhibit or its surface can be roughened be so he better over the jaws 8 rotatably and tensile in the setting device 1 can be held. These are also training courses, that are familiar to the expert, so that this will not be discussed further here got to. Optical displays can also be on the setting device 1 be provided, over which one Clamping process, the first working position and the recognizes the second working position.

A setting device for a self-drilling rivet has internals in a two-part housing, that grip a drill shaft in a torsionally and tensile manner can. In a first working position, the Drilling process carried out for the self-drilling rivet and The self-drilling rivet is in a second working position set and the closing head trained. The jaws move axially until the drill shank tears off the drill head. The operations for drilling and riveting in different directions of rotation of a shaft executed. In a first end position of the shaft the drilling takes place and in a second end position fixation of the bourgeoisie in the wave the setting device and the setting of the self-drilling rivet.

Claims (10)

1. Setting device for a self-drilling rivet having a housing (2, 3) and housing components which engage and hold a drill shaft (51) in a rotational and tensile fashion and which can be set into rotation by means of a drive
   characterized in that,

   a shaft (32) is borne in a housing portion (3) of the setting device (1) by means of friction bearings (33, 34) for rotational and axial displacement so that an axial displacement of the shaft (32) causes an outer teething (31) on the free end of the shaft (32), in a first end position of the shaft (32), to engage into an inner teething (30) of a support ring (20) to generate a rotating connection with a conical bushing (9), rotatable and displacable clamping jaws (8) of the housing components, and a drill shaft (51), so that the drill shaft can be held and changed from a first end position of the shaft (32), and by means of a rotational motion directed oppositely to that used for drilling, into a second end position of the shaft (32) for use as a setting device (1),

   and that, in a second end position of the shaft (32) which is axially displaced relative to the first end position, the outer teething (31) engages into the outer teething of two pinion gears (38, 39) attached in a rotating fashion on the housing component (3) which create a rotating connection to the guide bushing (25) via a toothed gearing (28) on the surface of an outer guide bushing (25) so that the guide bushing (25), during rotation of the shaft (32) in the second end position, is axially displaced via a thread (26) located on the inner surface of the front housing (2), wherein the axial displacement of the guide bushing (25) triggers an axial displacement of the clamping jaws (8) holding the drill shaft (51) with respect to tensile forces to end a riveting procedure with this rotational motion and

   that the housing components in the setting device (1) are covered by a guide bushing (7) disposed in a stationary manner relative thereto.
2. Setting apparatus according to claim 1, characterized in that the gripping jaws (8) can be displaced along a conical surface (18) of a conical bushing (9) by means of a spring-loaded inner guide bushing (11).
3. Setting apparatus according to claim 1 or 2, characterized in that the gripping jaws (8) the inner guide bushing (11), the conical bushing (9), a helical spring (19) and a support rang (20) form a commonly movable component.
4. Setting apparatus according to claim 3, characterized in that the component is axially displacable via an outer guide bushing (25), whereby the outer guide bushing (25) exhibits a gear (28) and a ring-shaped surface, and a thread (27) is formed on the circumference of the outer guide bushing (25) along the axial length.
5. Setting apparatus according to claim 3 or 4, characterized in that the support ring (20) exhibits an inner gear (30) in a bore, which can be brought into engagement with an outer gear (31) of the shaft (32).
6. Setting apparatus according to one of the claims 1 through 5, characterized in that the setting apparatus (1) exhibits a first housing portion (2) and a second housing portion (3) which are connected to each other in a detachable fashion.
7. Setting apparatus according to one of the claims 1 through 6, characterized in that a shaft (32) is guided and borne in an axially displacable fashion within the setting apparatus (1), and the shaft (32) can be manually positioned from a first working position to a second working position in the setting apparatus (1) in opposition to the spring forte of a helical spring (41).
8. Setting apparatus according to one of the claims 2 through 7, characterized in that a spring-loaded bolt (14) is arranged in the inner guide bushing (11).
9. Use of the setting apparatus (1) according to one of the claims 1 through 8 as a attachable accessory for a commercially available hand-drilling machine with left and right drive.
10. Method for the use of the setting apparatus (1) according to one of the claims 1 through 8,
    characterized in that

    a drill shaft (51) of a self-drilling rivet (50) is introduced through a guide bushing (7) into the setting apparatus (1) in a largely resistance-free fashion when the gripping jaws (8) are seated on the guide bushing (7),

    the drill shaft (51) is inserted sufficiently far into a blind hole bore (12) until, on the one hand, a bolt (14) and a sprang (15) or, on the other hand, a head of the self-drilling rivet (50) limit the axial displacement,

    a shaft (32) is brought into engagement with pinions (38, 39) in a rotationally secure fashion, which axially displaces one of the conical bushings (9) supporting the gripping jaws (8) via a rotational motion in such a fashion that an inner guide bushing (11) axially drives gripping jaws (8) such that the gripping jaws (8) clamp the drill shaft (51) in a rotationally and translationally secure fashion and a free space (52) is formed between the guide bushing (7) and the front side of the gripping jaws (8),

    the shaft (32) is positioned into a first working position in which it is arranged in rotationally secure engagement with a support ring (20) and, by rotation of the shaft (32), drives the drill shaft (51),

    the shaft (32), after completion of the drilling operation, is brought into a second working position to cooperate with the pinions (38, 39), whereby the gripping jaws (8) are axially displaced away from the self-drilling rivet (50),

    the gripping jaws (8), after the tearing-off of the drill head, are axially so displaced that they seat on the guide bushing (7) and the gripping jaws (8) exert a force onto the spring-loaded inner guide busing (11) in such a fashion that the clamping connection between the drill shaft (51) and the gripping jaws (8) is released, and a spring-loaded bolt (14) automatically ejects the drill shaft (51).

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