DE102006007708A1 - Blind rivet for securing plates together has a central pin that is driven into body using an impact tool - Google Patents

Abstract

A blind rivet used to fix a pair of plates together has a main body having a flange [3] and a centre bore. When inserted into the hole in the plates [18,19] a captive central pin [10] is driven into the rivet body using an impact tool [20]. This causes expansion of the rivet to clamp the plates together.

Description

The The invention relates to a rivet designed as a rivet, a device and a method for setting it.

blind rivets have been known for a long time. They serve to help two elements a riveting operation to connect with each other, with access to the back is not required. For this reason, blind rivets are suitable especially where access to the back of the two to each other too connecting elements not possible is. In the usual Blind rivets it is necessary to use the components to be connected holes to provide, through which the rivet body is inserted through. From the front is then at one Rivet pin pulled the rivet on the back to form a rivet head deformed.

It is already known, the tip of the thorn, on the front of the rivet stands out as a self drilling bit, so that with a corresponding device of the drilling process in one Operation can be carried out with the riveting process.

since For some time, it has also been known to use a blind rivet as a rivet form so that he can use a firing device in the elements to be joined without Pre-drilling a hole is shot. In these known weft rivets must like the other blind rivets on a thorn after setting be pulled to effect the actual riveting operation. This relatively long thorn, which is attacked by a tool for pulling becomes subsequently thrown away or falls uncontrolled in the area of the place where the riveting was carried out.

In addition, Hammerschlagniete are known in which a mandrel with a tip is inserted into a bore in a rivet body, which protrudes from the front side of the collar with its blunt end. Such rivets are driven in with a hammer blow. The hammer hits the protruding end of the spike. This hammer blow is not able to effect an exact division of the forces into a pure propulsive force and only then an expansion force ( US 3,691,924 ).

Of the Invention is based on the object, the possibility of blind riveting to improve so that after the riveting carried out no waste, which would have to be disposed of separately.

to solution this task strikes the invention, a Schussniet with the features mentioned in claim 1 in front. Further developments of the invention are the subject of the dependent claims.

Of the Schussniet proposed by the invention thus has a rivet body a collar that limits the bullet process. The rivet body points also a rivet tip, which is designed so that they when shooting creates a hole. Furthermore contains the Schussniet a central attack surface, at which with a sudden Movement in the same direction of movement is attacked in also the shooting of the rivet. This sudden attack causes the front Area of the rivet body and / or the rivet tip, for example, beyond the through hole is present, is deformed so that there forms a rivet head, which causes the determination of the rivet. For a hole in a thicker one Component can deformation by spreading even within the hole yourself. This too leads to a determination of the Schussniets.

in the Contrary to the prior art thus takes place a double movement in the same direction and not two movements in different directions.

Of the used here term "shooting" is a sudden Feed movement mean, which is not necessarily a shoot must act in the true sense.

The central attack surface, to be attacked for deforming the front area, For example, it may be formed at the end of a hole in the rivet body be. The hole leads for example, as far as the thickness of the two together corresponds to joining sheets.

It is also possible and is within the scope of the invention that the central attack surface of a constriction of a hole is formed in the rivet body.

According to the invention, in Be provided training that the central attack surface of a pestle of a Setting tool is acted upon. The hole is so dimensioned that such a plunger in the Hole can penetrate. In this case remains after production of the Riveting a hole in the front of the rivet body.

A Another possibility proposed by the invention is that in the hole inside the rivet body an expanding body is arranged, one of the central attack surface associated with this opposite End has. At the other end of Aufweitkörpers then the plunger of the Attack setting tool.

Especially it makes sense if, what can also be provided, the Aufweitkörper in not only arranged but also fixed as far as the hole, that he can not fall out of the weft rivet. This can be done by a small clamping can be achieved.

In Further development of the invention can be provided that in unexpanded condition of the weft rivet the expander made the annular attack surface the collar of the rivet body protrudes. This outstanding part can be used to attack the Serve weft rivet in a setting tool. In addition, this design can be considered Setting control can be used, since after setting no part survives, but in the most reasonable case, the end of Aufweitkörpers flush with the surface of the collar runs.

In Development of the invention can be provided that the rivet tip a one-piece Part of the rivet body is. The kind, like that is taken care that the rivet tip after setting to form a Nietkopfs deformed, can by appropriate incisions, cavities or like that.

It but is also possible and is proposed by the invention that the rivet tip a separate Part is, that with the rivet body is connected.

A another possibility which is within the scope of the invention, is that the rivet tip a one-piece Part of the expander is.

Also It can be provided here that the rivet tip is a separate component is that with later the expander is connected. In particular, it can be provided that the rivet tip is made of a different material than the rivet body or the Aufweitkörper, or but also that the rivet point is made of the same material, but pretreated differently than the rivet body or Aufweitkörper.

If the rivet tip part of the expander or connected to this, can be provided according to the invention in development be that between the expander and the rivet tip of a constriction is present, which rests on the narrowing of the hole.

According to the invention can be provided be that the hole behind the constriction, which leads to deformation, itself as a narrow gap or otherwise continues to to facilitate the deformation of the tip or to favor.

The Invention proposes also a method of making weft rivets a rivet body manufactured as a blind rivet and with a collar in the area of his one end is provided. The rivet body comes with an additional central attack surface for a Tool and provided with a rivet tip. The area of the rivet body between the impact of the rivet point and the central attack surface becomes designed such that a sudden action on the attack surface to a Deformation of this area leads. This embodiment can by the provision of cavities, predetermined bending points or by a suitable material selection or material treatment be realized.

The Invention proposes also a method for setting weft rivets, in which a Schussniet provided with a Nietspitze in two with each other elements to be connected until attachment of a bottom of his collar jerky on the surface is used, and then by a jerky Attack on a central attack surface in the same direction as in the previous setting the area between the attack surface and the tip of the rivet body is deformed to form a rivet head.

The Invention proposes also a device for setting weft rivets before. These Device contains a holder for holding a Schussniets in a certain Position, a tubular at least in its front area Feed body the attack on an annular surface of the attack Schussniet is determined, a drive for the sudden feed movement of the tubular Feed body, a coaxial with the feed body arranged ram, the for attack on a central attack surface of the Schussniets or on its expanding body is determined, and a drive for the sudden feed of the plunger. there are the two feed movements so matched, that the pestle later than the feed body at its respective attack surface incident. In this way it is achieved that the first rivet body penetrates into the two elements to be joined, until he with his Collar on the surface is applied. Only then carried out by advancing the plunger widening on the opposite Side of the two elements.

Around to achieve that the two feed movements the said temporal Get distance, there are different ways of getting the invention be proposed. A possibility This is because the two feed movements started one after the other become. This can be done by appropriate control of the drives.

A another possibility is that the two feed movements a different have long path of movement. If the plunger has a longer path of movement, this will result to reach his position later when he starts at the same time.

A yet another possibility There is a chronological order of the two activities in that the two feed elements have a different length.

Of course they are also possible combinations of these proposals.

When drive way comes the explosive combustion of gas or propellant charge in question, also a gas spring with tensioning device, an oil pressure spring with tensioning device, a Lithuanian piston, a compression spring with Clamping device or compressed air.

When Energy source for the bias of the feed drive comes a battery, a power cable to Connection to a power line, compressed air or hydraulic in question.

Further Features, Details and Benefits The invention results from the claims and abstract, their wording by reference to the content of the description is made, the following description of a preferred embodiment the invention and with reference to the drawing. Hereby show:

1 a partially sectioned side view of a Schussniets according to a first embodiment of the invention;

2 the section through the Schussniet the 1 in a first stage of the setting process;

3 one of the 2 corresponding representation in a second stage of the setting process;

4 one of the 2 and 3 corresponding representation in a third stage of the setting process;

5 the cut in a fourth stage of the setting process;

6 the result of the riveting process;

7 one of the 1 corresponding representation in a second embodiment of the invention prior to setting;

8th the state after setting the Schussniets the 7 ;

9 one of the 1 corresponding representation in a third embodiment;

10 greatly simplifies a setting device for setting the weft rivets according to the invention;

11 one of the 1 corresponding representation of another Schussniets according to the invention;

12 a view of the Schussniets 11 from underneath.

1 shows in the left half a side view and in the right half a longitudinal section through a Schussniet according to a first embodiment of the invention. The Schussniet contains a rivet body 1 in which in its central area the shape of a sleeve 2 having. On the one, in 1 upper end is on the rivet body 1 a collar 3 formed, which has a flat bottom 4 having. The bottom 4 is the side from which the sleeve section emerges 2 extends. On the level bottom 4 opposite top 5 a flat surface is formed, which is designed as an annular engagement surface for a setting tool. The surface could also be curved like a lens. The shape of the ring surface may be circular, but also polygonal.

On her collar 3 opposite side is the middle sleeve section 2 in a rivet point 6 in which the rivet body 1 has a gradually decreasing cross-section. The rivet point 6 ends in a sharp end 7 ,

In the sleeve section 2 is a cylindrical inner opening 8th formed, which could also be called a hole, except for the fact that this hole 8th does not necessarily need to be drilled. But it has in the form of a bore, that is a circular cross-section in which over the length of the hole is constant. At the end of the hole 8th is a funnel-shaped narrowing 12 the inner opening is present, which then into a narrow slot 9 passes. This slot 9 goes to the top 7 the rivet point 6 , The front end can connect the two parts on both sides of the slot 9 have, so that the slot 9 right at the top 7 still closed.

In the hole 8th is an expanding body 10 arranged, with some clamping at the edges of the hole 8th is applied. He is so determined that he can not fall out when handling the Schussniet out. The determination can also be done by knurling. That in the interior of the hole 8th directed end 11 is about the beginning of the funnel-shaped narrowing 12 at. The opposite outer end 13 of the expander 10 protrudes clearly over the annular attack surface at the top 5 of the collar 3 out.

2 shows the mutual association between the weft rivet and a tool 14 , which is shown greatly simplified. It is not shown as the Schussniet on or opposite the setting tool 14 is held. The tool 14 contains a feed body 15 which is tubular in at least in the front, that is intended for attack on the Schussniet certain area. The feed body thereby forms an annular attack surface, with which he on the flat top 5 of the weft rivet rests. The inner bore 16 of the tool is dimensioned so that the feed body on the Aufweitkörper 10 past the top of the collar 3 can attack. In this mutual assignment, the Schussniet is on top 17 two sheets to be joined 18 . 19 placed. By pressing a drive, not shown, the feed body 15 abruptly moved forward. The rivet point 6 gets through this blow in the two sheets 18 . 19 smashes and forms a hole. The feed movement is terminated by the fact that the flat bottom 4 of the collar 3 on the surface 17 the two sheets came to the plant. Of course, the collar needs 3 so strong that it resists this blow. One the feed body 15 Surrounding sleeve comes on the sheet in 3 to lie on. Excess energy is thus from feed body 15 derived in the attachment sleeve, so that the collar 3 The weft rivet needs to take up little energy if it is set flush.

The resulting condition is in 3 shown. Now, in a further step, a pestle 20 through the hole 16 of the feed body 15 abruptly moved forward. The pestle 20 beats with his front face 21 on the outer face 13 of the expander 10 and push it forward into the interior of the hole 8th into it. The state of impact of the plunger 20 on the expander 10 is in 4 shown.

If the front end 11 of the expander 10 on the constriction 12 at the end of the hole 8th meets, the two or more parts of the rivet tip are deformed outwards. This is through the slot 9 allows. Because the two or more parts of the drill bit 6 but at the top 7 themselves connected together, the parts can not tear apart, but form a rivet head 22 like this in 5 is shown. In this state, the outer face lies 13 of the plunger 10 in the same plane as the top 5 of the collar 3 of the rivet body. The rivet head 22 which has formed is inside through the expander body 10 strengthened. Now the tool is removed and a riveted joint has been created that looks like this 6 is shown in a side view. The expander 10 no longer protrudes from the visible top 5 of the collar 3 out. If you look at the riveted connection from the top, so also in 6 From the top, looking, one must recognize, whether this end face 13 flush with the top 5 runs. If it has penetrated too deeply into the rivet body, then one can conclude under certain circumstances that there has been too little resistance to the feed movement. This could be an indication that the connection is not strong enough. In this respect, the expansion body forms a setting control.

When referring to the 1 to 6 illustrated and described embodiment is the rivet tip 6 one-piece part of the rivet body, wherein the Schussniet consists entirely of two parts, namely the rivet body itself and the Aufweitkörper 10 , As the expander 10 is determined by clamping in the rivet, it is a uniformly manageable component, which can be arranged for example in a setting tool in a magazine.

The 7 and 8th show a second embodiment of a Schussniets according to the invention. Again, the rivet body contains an outwardly directed collar 3 with a flat bottom 4 and also a flat top 5 , In the rivet body is in the sleeve area an inner opening 28 formed, which in turn is cylindrical with a constant diameter. It contains a narrowing 29 followed by another cylindrical transition. The sleeve section 2 ends in a flat face parallel to the opposite top 5 and bottom 4 of the collar 3 runs. At the inside of the opening 28 directed front side of the expander 30 is over a shaft 31 the rivet point 26 formed. The rivet point 26 is in this case a compact body without internal recess or predetermined breaking points. The expansion happens here in that the front rounded end of the expander 30 the parts of the sleeve section 2 displaced to the outside, as shown schematically in 8th is shown. In this embodiment, therefore, a division of the functions in such a way that the Nietspitze 26 only serves to make the hole in the two sheets, while the formation of the rivet head on the sleeve portion 2 limited to the rivet body.

In the 7 and 8th illustrated embodiment is primarily in the applications where the back of the riveted joint is not visible. Of course it is also possible to use the shaft 31 cancel.

9 shows a third embodiment of a Schussniets according to the invention. The sleeve section 2 contains an interior opening 8th which in turn could be termed a bore if that term did not contain an indication of the nature of the manufacture. The inner opening 8th ends on a ground that has a concentric elevation 32 having. Below the survey 32 or the soil 33 is in the rivet point 36 a cavity is formed that extends to the top 7 rejuvenated. This embodiment is used so that it is set in the same manner as described with reference to FIGS 1 to 6 has been described. If the Schussniet the 9 the sheets 18 . 19 has penetrated the plunger 20 jerkily into the interior of the opening 8th moved in and hit on the survey 32 on, which is now the central point of attack for the pestle 20 forms. When hitting the survey 32 the front tip is also deformed so that riveting takes place in this way. Here the ram itself serves as Aufweitkörper.

In the same way, a Schussniet can be spread, which has no bottom and no cavity, but is the same structure as the Schussniet the 1 , only without the expander used 10 ,

10 now shows a simplified setting tool, can be set with the weft rivets according to the invention. The setting tool contains in a housing 40 the already mentioned feed body 15 which in the example shown has tubular shape over its entire length. He is in the case 40 guided displaceable in the longitudinal direction. Within the feed body 15 is the pestle 20 coaxially guided also displaceable in the longitudinal direction. For movement of the two feed elements, namely the feed body 15 and the pestle 20 , is a drive 41 in the case 40 arranged, which, as indicated, both feed elements can move forward. The drive 41 For example, it may be gas powered, for which purpose a gas cartridge 42 also in the case 40 is arranged. In the handle, a trigger can be arranged to trigger the setting process. Laterally on the housing 40 is a magazine 43 arranged, in which a series of weft rivets is housed.

The Schussniet in the 11 shows further ways in which the invention can be implemented. In the example of 11 The Schussniet again contains a collar 3 , which has a substantially flat bottom 4 having. Under it should be understood that the bottom 4 Can have ribs, individual projections or the like, which can penetrate when shooting the Schussniets in the surface of the element with which the Schussniet to be connected. Such a design can serve to produce an anti-rotation. It is also conceivable that the substantially flat underside 4 of the collar 3 is slightly curved, so that the outer edge digs something into the surface. All these educations, which deviate slightly from a mathematical level, are to be understood by the term essentially flat bottom 4 fall.

The collar is formed substantially thicker in this embodiment compared to the previous embodiments, so that the attack surface 5 a greater distance from the substantially flat bottom 4 having. Also in this case is the attack surface 5 ring-shaped, so that they bore 8th surrounds inside the Schussniets. The collar points to the bottom 4 subsequent first area 50 on, in which he has a hexagonal outer circumference. This hexagonal shape of the section 50 of the collar 3 goes out too 12 before. At this first section 50 then closes a second section 51 where the collar is cylindrical and an external thread 52 having. When setting this Schussniets mentioned in the earlier embodiments Aufsetzhülse on the outside of the hexagonal neck 50 attack, leaving no damage to the external thread 52 occurs. The attack surface 5 , which is flat in the example shown, could also be curved. This also applies to attack surfaces in the other embodiments.

In the embodiment according to 11 is the hexagonal area 50 of the collar 3 formed with a larger diameter than the threaded neck 51 , Of course, it is also possible to make the hexagonal area smaller, so that then the threaded neck 51 everywhere over the hexagonal kingdom survives.

The hexagonal section 50 can serve to attach a wrench.

In the hole 8th inside the Schussniets is an expander 53 arranged, which is also fixed, for example by a knurling or the like. This expander 53 has an attack surface as in the previous embodiments 11 for engaging in a narrowing of the hole 8th on. The rivet point 6 is divided in the example shown by slots so that no connection is made at the very front. This means that the front area is not compressed, as in 5 and 6 is shown, but that the front portion is spread outwards. However, this also forms a rivet head in the context of the invention.

The mentioned expander 53 is so in the drilling 8th the Schussniets inserted between its outer face 54 and the attack surface 5 of the collar 3 there is a gap. In this area, an internal thread could be attached. Because the spreading with a pestle 20 happens, this plunger can be guided so that its outside is a distance from the inside of the hole 8th has, so that the local internal thread is not damaged.

The in 11 and 12 shown weft rivet may serve to attach after setting the Schussniets at this Schussniet objects, for example using the external thread 52 or the mentioned internal thread. When screwing on the hexagonal area 50 be held with a wrench to prevent the application of higher torques co-rotation of the Schussniets and thus a possible loosening. In like manner, the penetrating part of the Schussniets, so the area between the top and the flat bottom 4 , also have a different cross section of a circular cross section, as the 12 shows.

The Schussniet according to the invention, in particular in the embodiment according to 11 and 12 , not only serve to connect two parts, such as sheets, with each other. Especially in the embodiment according to 11 For example, it is possible to use the weft rivet only to fix itself, and then to fasten another element to the weft rivet with the aid of the facilities provided. For this purpose, both the external thread 52 as well as an internal thread serve. Other possibilities are conceivable, for example, through the threaded neck transverse bores, bayonet connections or the like.

If a weft not only can serve to connect two sheets, but also to fix only oneself, so it is not required that the widening of the front area up the back of an element to which the Schussniet be attached should. It is also possible and is within the scope of the invention that the expansion within the hole or hole can be made in the element itself, if the element to which it is attached has a correspondingly large thickness having. A deformation to the outside can therefore also within a hole, also a blind hole, done.

Claims (28)

Weft rivet, with 1.1 a rivet body ( 1 1.2, a collar formed thereon ( 3 ), the 1.3 an at least approximately flat bottom ( 4 ) and 1.4 on the flat bottom ( 4 ) opposite front side ( 5 ) an attack surface for a tool ( 14 ), 1.5 a rivet tip ( 6 . 26 . 36 ) for producing a hole in the component to which the weft rivet is to be attached, and having 1.6 a central engagement surface for a widening process, which is designed and arranged 1.7 such that it upon impact of a tool (plunger 20 ) to a deformation of the front portion of the rivet body ( 1 ) at a distance from the bottom ( 4 ) of the collar ( 3 ) leads. A weft rivet according to claim 1, wherein the central attack surface at the end of a hole ( 8th . 28 ) in the rivet body ( 1 ) is formed. A weft rivet according to claim 1 or 2, wherein the central attack surface is of a constriction ( 12 . 29 ) of a hole ( 8th . 28 ) in the rivet body ( 1 ) is formed. A weft rivet according to any one of the preceding claims, wherein the central engagement surface of a ram ( 20 ) of a setting tool ( 14 ) can be acted upon. Weft rivet according to one of claims 1 to 3, wherein in the hole ( 8th . 28 ) an expander ( 10 . 30 ), one of the central attack surface associated with this opposite front end ( 11 ) having. A weft rivet according to claim 5, in which the expansion body ( 10 . 30 ) from the attack surface ( 5 ) of the collar ( 3 ) of the rivet body ( 1 ) stands out. Weft rivet according to one of the preceding claims, in which the rivet tip ( 6 . 36 ) integral part of the rivet body ( 1 ). A weft rivet according to any one of claims 1 to 6, wherein the rivet tip is a separate one with the rivet body ( 1 ) is connected component. Weft rivet according to one of claims 1 to 6, in which the rivet tip ( 26 ) integral part of the expander ( 30 ). A weft rivet according to any one of claims 1 to 6, wherein the rivet tip a separate with the expander connected component is. Weft rivet according to one of the preceding claims, in which the hole ( 8th ) behind the narrowing ( 12 ) to the front ( 7 ) of the rivet tip ( 6 ) continues. A weft rivet according to claim 10 or 11, wherein between the expander body ( 30 ) and the rivet tip ( 26 ) is formed a constriction. Weft rivet according to one of the preceding claims, in which the rivet tip ( 6 . 26 . 36 ) of a different material or of a material otherwise pretreated than the rivet body ( 1 ). Weft rivet according to one of the preceding claims, in which the collar ( 3 ) one with a thread, in particular an external thread ( 52 ) ( 51 ), which the attack surface ( 5 ) having. A weft rivet according to one of the preceding claims, in which the inner bore ( 8th ) has an internal thread. Weft rivet according to one of Claims 5 and 7 to 15, in which the expansion body ( 53 ) is arranged sunk in the Schussniet. Weft rivet according to one of the preceding claims, in which the front region of the rivet body ( 1 ) is formed for expansion within a hole. Method for producing weft rivets, in which 18.1 a rivet body ( 1 ) manufactured as a blind rivet and with a collar ( 3 ) is provided in the region of its one end, 18.2 the rivet body ( 1 ) with an outer attack surface ( 5 ) and a central attack surface for each tool and 18.3 with a riveting tip ( 6 . 26 18.4 is the area of the rivet body ( 1 ) between the impending ( 7 ) of the rivet tip ( 6 . 26 ) and the central attack surface is configured such that a sudden action on the central attack surface to a deformation of the rivet body ( 1 ) leads to this area. Method for setting weft rivets, in which 19.1 one with a riveting tip ( 6 . 26 . 36 ) into an element until a lower surface ( 4 ) of his collar ( 3 19.2 then abruptly attacking on a central attack surface in the same direction the area between this attack surface and the tip of the weft rivet to form a rivet head (FIG. 22 ) is deformed. A method for setting weft rivets according to claim 19, wherein at the central attack surface by means of a plunger ( 20 ) which is retracted after deforming the front portion of the rivet. Apparatus for setting weft rivets, comprising 21.1 a holder for holding a weft rivet, 21.2 a feed body (at least in its front region) 15 ), 21.3 a drive ( 41 ) for the sudden advance of the feed body ( 15 ) 21.4 a coaxial with the feed body ( 15 ) arranged plunger ( 20 ), 21.5 a drive ( 41 ) for the sudden advance of the ram ( 20 21.6, the two advancing movements are coordinated with one another in such a way that the plunger ( 20 ) later than the feed body ( 15 ). Apparatus according to claim 21, comprising means to trigger the two feed movements. Apparatus according to claim 22, wherein the device is designed such that to achieve the time interval the two feed movements are started one after the other. Apparatus according to claim 22 or 23, wherein the Device is designed such that to achieve the temporal Distance the two feed movements a different length Have movement path. Device according to one of claims 22 to 25, in which the Device is designed such that to achieve the temporal Distance the two feed elements have a different length. Device according to one of claims 21 to 25, wherein for both feed operations a common drive ( 41 ) is provided. Device according to one of claims 21 to 26, wherein for both feeding actions each own drive is provided. Device according to one of claims 21 to 26, with a magazine ( 43 ) for receiving and providing multiple weft rivets.