DE102011005408A1 - Jointed connection structure for use in e.g. motor vehicle, has joint portions having mating surfaces partially connected to each other through laser machining process such that a roughened or uneven surface is formed on one surface - Google Patents

Abstract

The jointed connection structure comprises a joint portion (1) having a mating surface (3), and a joint portion (2) having a mating surface (4) connected to other joint portion by pressing force. The mating surfaces are partially connected to each other through laser machining process, such that a roughened or uneven surface is formed on one of the joining surfaces or to cause a change in their surface condition. An independent claim is included for manufacturing method of jointed connection structure.

Description

The invention relates to a joint connection, in particular a press connection and a screw connection of at least two joining parts and a method for producing such a joint connection. The invention is preferably used in motor vehicles.

The joining of parts with a pressing operation creates durable, vibration-proof connections that can transmit large and in particular also changing or abruptly occurring forces. Mainly rotating parts such as impellers, drive wheels, turbine runners, conveyor wheels, impellers and the like are pressed on or axially against shafts or axles. In addition to press joints of shaft and hub or shaft to shaft, which serve to transmit a torque, press bonds can also the transmission of only shear forces, d. H. of axial or transverse forces, serve. Although the invention primarily relates to compression composites for the transmission of torques, it is also directed to compression composites for the transmission of only linearly acting forces between the parts to be joined of the respective compression composite. The transmittable torque or the transmittable force depends on the surface pressure in the joint of the parts to be joined, the size of the surfaces of the parts to be joined and the coefficients of friction. However, these sizes can not be increased arbitrarily, since, for example, with an increase in the frictional joining surfaces and the size of the joining parts increases or weakening at least one of the parts is caused by material-removing machining or geometrically complex formed the joint surfaces, made of special materials or the surfaces must be laboriously processed, which increases the cost of production.

From the DE 10 2010 003 574 the applicant is a press bond with a first joining part and a second joining part known, wherein the second joining part is connected via a joint with the first joining part by means of pressing force. In the joint, a hard material particles in a resilient carrier mass containing mixture is arranged.

It is an object of the invention to strengthen the frictional engagement between joining parts of a screw or press assembly for a given joint surface and surface pressure and thereby increase the transmittable torque or the transmittable force.

The invention has a joint connection, such. As a press bond or screw, with a first joining part with at least a first joining surface and at least a second joining part with at least a second joining surface to the object, which are frictionally connected to each other by means of pressing force which presses the joining surfaces against each other. At least one subregion of the first joining surface and / or at least one subregion of the second joining surface are provided with a surface that changes the respective joining surface or surface texture, such as, for example, B. a surface roughening or preferably protruding and advantageously hard surface particles forming processes have been treated. As a result, the friction coefficient for at least the static friction between the first joining surface and the second joining surface is increased relative to a friction pairing in which the first and second joining surfaces would not have been treated with the method changing the surface finish. In particular, the method causes a surface which is changed or does not have a smooth surface to be present on at least one of the joining surfaces, which can be pressed onto the corresponding non-treated or smooth or likewise process-treated or rough counter-surface changed elevations, preferably hardened joining surface particles and / or slag particles, are present, which are present, for example, when pressing or screwing the parts to be joined, that is to say the surface or roughness or unevenness of at least one joining surface. H. when pressing the first and second joining surfaces against each other, dig or press into the counter-surface, in order to preferably increase the coefficient of friction between the joining surfaces.

Preferably, at least one joining surface has been formed or treated, for example by laser irradiation, that the particles, in particular hard particles, are finely distributed in large numbers over the joining surface or a subregion thereof, the particles having the same hardness as the joining parts, depending on the type of surface treatment can or advantageously also harder than the joining parts or their surface material can be formed.

The joint connection according to the invention makes it possible to considerably increase the forces or torques that can be transmitted by the press or screw connection. Conversely, for a given maximum torque or predetermined maximum force, the surface pressure or the joining surfaces of the joining parts can be reduced or a greater freedom in the choice of material can be achieved. Preferably, at least a majority of the particles protruding from the joining surface or hard material particles are buried or pressed into at least one or both joining surfaces. The deformation of the surface of the at least one first joining surface and / or the at least one second joining surface or the formation of hard particles or slag particles on this surface takes place. preferably by means of a method which acts by means of radiation energy on the surface or partial areas or individual points of the surface, preferably only at those locations at which subsequently also one or more unevenness or particles should be present. The method of treating or roughening the mating surface may be the action of a laser beam or laser beams, preferably as known, for example, in the field of laser marking. In this case, an object is irradiated with the aid of an intensive or high-energy laser beam, for example, and the material thus processed or labeled itself is changed, for example, deformed on the surface, so that, for example, without additional application of material simultaneously a small depression or Kuhle and an increase or a Particles, which may lie next to the recess is formed.

The material itself can, but does not necessarily have to, be chemically altered. The method may be performed, for example, in an ambient gas atmosphere which causes a component of the ambient gas to chemically combine with the material or be incorporated into the material during laser treatment, or that in the laser treatment, no component of the ambient gas chemically bonds to the material or embedded in the material, wherein a change of the surface condition can be based on physical principles.

A suitable ambient gas atmosphere may be, for example, air or a gas mixture comprising or consisting of oxygen, nitrogen, ammonia, one or more hydrocarbon compounds. Preference is given to using nitrogen-argon mixtures and / or nitrogen-argon-methane mixtures or other nitrogen-hydrocarbon mixtures. The chemically and / or physically modified or reshaped part region of the joining surface or the newly formed particles which preferably project somewhat from the surface are preferably harder than the starting material from which the joining surface consists. Preferably, after treatment or irradiation, these particles are firmly bonded to the joining surface, for example melted onto or melted into it.

Suitable metals or metal alloys for surface treatment are those in which hardened areas and / or hard slag particles form by laser irradiation or heat input, in particular in conjunction with one of the atmospheres mentioned herein. By way of example, mention may be made here of steel alloys, aluminum alloys or chromium-nickel alloys. Preference is given to using nitride and / or carbide formers or metals or alloys in which martensite structures can form.

Advantageously, the formed unevenness or particles of a joining surface are harder than the untreated areas of the opposing surface, for example, so that they can impress in a joining process in the counter-surface to increase the coefficient of friction.

The deformation or roughening of the joining surface processed in this way is preferably permanent and consequently also water-resistant and smudge-proof. Such deformation can be localized, fast, automated, and individually generated, for example, from a given imaging or labeling pattern. It is also possible, for example, to attach a machine-readable marking on the joining surface machined in this way, which can advantageously simultaneously serve to increase the coefficient of friction in the assembled state.

As used herein, the term "laser marking" is to be understood as laser surface processing without the need to form characters or a lettering.

It is also possible that the treatment of one or more joining surfaces for the deformation or roughening of the surface or for the formation of particles projecting on the surface by means of local heating, for example by means of locally acting microwaves, is generated.

In addition or as an alternative to the mentioned deformation or roughening methods, which operate without or substantially without material application or addition of material, it is also possible to use methods in which a material is deposited on the surface. For example, a beam melting method or even a selective laser melting can be used in which a material to be processed is applied in powder form in a thin layer on the respective joining surface. The powdered material can be completely remelted locally by means of laser radiation and, after solidification, forms a material layer fixedly connected to the original joining surface. This procedure can be repeated several times until a desired roughening or average particle size is achieved.

Likewise, a sputtering or sputtering process may be used, preferably a sputtering deposition process wherein a starting material is transferred to a gaseous phase and the gaseous material is subsequently guided to the surface to be roughened where it preferably condenses at predetermined locations and forms protrusions or particulate elevations. As well as a physical vapor deposition process, particulate formation, roughening or deformation of a smooth bonding surface can also be accomplished by a chemical vapor deposition process.

In addition, at least one joint surface can also on the in the above-mentioned DE 10 2010 003 574 be treated by applying a hard material particles in a yielding carrier mass-containing mixture or processed. The doctrine of DE 10 2010 003 574 with respect to a press bond, the formation of the hard material particles and the carrier mass and with respect to the method for producing a press bond is fully incorporated into this application and can be combined with the teaching described herein.

The unevenness or particles which are formed on a processed joining surface, for example by laser irradiation, according to a preferred embodiment have a size with a greatest extent over all three spatial directions of at most 300 micrometers. The extent in at least one spatial direction is preferably at least 5 micrometers. Hard material particles which may be melted or fused into the surface or protrusions protruding from the joining surface are particularly preferred with an extension of at least 30 micrometers and at most 80 micrometers.

In a method according to the invention for producing a joint assembly, the parts to be joined are shaped with their respective joining surfaces or their respective respective joining surfaces. At least one of the joining surfaces is processed or treated as described above, for example by means of locally concentrated action of energy, for example in the form of laser beams or microwaves, preferably for roughening or locally forming particles or unevenness. In this case, a surface which is in itself smooth or flat can be changed locally, or at predetermined surfaces or regions, in particular deformed or roughened. The change or roughening can be done, for example, by heating and local remelting, wherein no material is removed from the joining surface or added to the joining surface. Likewise, the roughening of the joining surface or the generation of unevenness on or on the joining surface can be effected by local material removal and / or local material application, wherein the methods mentioned in this description can also be carried out in combination simultaneously or, for example, offset in time. Subsequently, the first joining surface of the first joining part and the second joining surface of the second joining part, d. H. the joining parts pressed against each other with their joining surfaces pressed together, for example, via a separate from the first and second joining part, such. As a screw or a nut or generally a clamping element, via a press fit, with the second joining part on the first joining part pressed (Längspressverband) or shrunk (cross press line), or a conical seat between the first to second joining part.

Thus, according to the invention, an intermediate element, for example a diamond disk, which increases the frictional force between two elements can be dispensed with. The processing according to the invention, in particular roughening of the surface (s) of joining surfaces, can be integrated in a predetermined assembly process in a time-neutral and cost-effective manner. Furthermore, existing parts or production processes can also be used without problems even when the method according to the invention is used. In particular, it is not necessary that, as with other methods for roughening a surface, a bulk container must be provided.

The joining parts can be clamped against one another in the joining or pressing assembly, in particular by means of one or more connecting means (s) in the region of the joining surfaces, d. H. be pressed against each other. The single or the plurality of connecting means or clamping means may or may in particular be rivet or screw means. The roughening of at least one joining surface or the formation of hard material particles reinforces the rivet or screw or other primary connection of the joining parts or allows a weaker dimensioning of the rivet or screw connection or an optionally different type of a primary connection in the region of the joining surfaces exciting each other. As a result, additional material savings and weight reductions can be achieved.

In preferred first embodiments, the joining parts form the joint with end faces. The pressed against each other in the joining or pressing composite faces form the joining surfaces. Typical representatives of such joining or pressing connections are flange connections. The joining parts may each have a connecting flange for producing the joining or pressing connection, especially for the joining or press connection. In one or both of the joining parts, a joining surface may also be formed by means of a shoulder, over which the respective joining part is reduced in diameter, that is to say falls from one peripheral surface to another circumferential surface. Furthermore, an end-side end face may also form its joining surface in one of the joining parts or in both joining parts. In any case, lie the joining surfaces of the joining parts facing each other axially over the joint. Preferably, they contact each other directly. In any case, if the gap forms a gap, this gap is smaller than a largest dimension of the majority of the projections or elevations or hard material particles of the joining surface. However, a pressing of the joining surfaces directly against each other is given preference.

In second process guides, one of the joining parts can be brought to an excess, at least in the region of its joining surface or joining surfaces relative to the other joining part, either by heating the one or cooling the other joining part or by heating the one and cooling the other joining part in combination. The roughening of the surface, for example by laser marking is preferably provided in the unheated, possibly reduced by cooling in volume joining part. Subsequently, the joining parts are positioned relative to one another in the position they are to take in the subsequent press assembly, and finally the heated joining part is shrunk onto the other joining parts or the reduced volume joining part is stretched into the other joining part, so that a shrink fit fit or an expansion press fit or both are obtained in combination.

Instead of or in addition to a fit produced by shrinkage or elongation, circumferential surfaces of the parts to be joined may also be closely matched to one another in the formation of the joining surfaces, so that a frictional connection is established even when these circumferential surfaces are pushed over. In such embodiments, in addition to the roughening, for example by laser irradiation, at least one pocket may be formed in at least one of these peripheral surfaces, which may be formed with the one of the DE 10 2010 003 574 filled mixture is filled. After the joining parts have been pushed axially together with these circumferential surfaces, an optionally provided mixture located in the at least one pocket can be transported out of the pocket into the joint between the peripheral surfaces by a relative rotational movement between the joining parts. In this relative rotational movement, both the particles formed by laser irradiation, for example, and the optionally provided hard material particles excavated from the pocket dig into the two peripheral surfaces, so that a further relative rotational movement between the parts to be joined can no longer be carried out Type of barb acting hard particles is prevented. A press bond between circumferential surfaces is particularly suitable for connecting large structures, for example for a press connection of a turntable of a crane and a shaft for the turntable.

The joining surfaces may have orthogonal or at least substantially orthogonal to the peripheral surfaces pressed together and be clamped axially against one another when the friction compound is produced. The Reibverbund the peripheral surfaces can ensure in such embodiments that the joining surfaces are still stretched with a clamping force against each other. The joining parts are in such embodiments by means of a combination of circumferential surface pressing on the one hand and a clamping of the joining parts axially against each other by means of one or more clamping means (s) joined on the other hand to the friction compound.

Although the at least partial or complete roughening of at least one joining surface is preferably carried out prior to the positioning of the joining parts on the relevant joining part, it is quite conceivable for the joining process that the roughening or joining surface treatment is carried out only after the positioning of the joining parts.

The joining parts are preferably metallic at least at their joining surfaces, more preferably the joining parts are metal parts. In particular, they may be cast or sintered parts, wherein both parts to be cast or sintered parts or one of the parts to be joined may be a casting and the other a sintered part. In alternative embodiments, the parts to be joined are plastic parts. Furthermore, combinations of metal joining parts and plastic joining parts are also possible. For metal joining parts, Fe-based or Al-based or optionally Mg-based alloys are preferred. The joining parts may be in particular steel parts. They may have a hardened surface, in the case of steel parts, for example, a case hardened such as carbonitrided surface. However, the hard material particles should be harder than the joining surfaces, so that preference is given to non-hardened joining surfaces.

Depending on the type of roughening or materials used, the surface treatment is selected to be suitable for the formation of unevenness, for example the laser power and the irradiation time per surface are adjusted so that the desired (average) particle size, particle hardness or roughening is obtained.

The roughening of the particle formation can take place partially or over the entire area of one or all joint surfaces. For example, a machining, for example laser irradiation or lettering, depending on the design of the joining part or the joining surface partially or over the entire length in the longitudinal or axial direction and / or transverse or circumferential direction, for example, linear, annular, annular section, strip-shaped, be provided spiral, helical or rectangular.

The joining or pressing composite according to the invention is preferably used in a motor vehicle. However, the invention is advantageous for any joining or pressing combination of a shaft with a hub or generally two shafts, but in principle also for joining or pressing composites which only have to transmit linear forces. In torque-transmitting joining or pressing composites, the first joining part can form the shaft and the second joining part can form the hub. Instead, the joining parts may each have only one connecting flange and be pressed axially against the connecting flange of the respective other joining part with their connecting flange forming the joining or pressing composite. The at least two interconnected joining parts according to the invention are each referred to as a shaft, if between the joining parts joined according to the invention, a torque is transferable and the joining or pressing composite is provided for a torque transmission. Fasteners designated by the invention as shafts may be joined together in particular in a shaft-hub connection, preferably with end faces pressed axially against each other.

The second joining part can for example form a drive wheel for a camshaft or in particular for a pump of the motor vehicle. In a pump, the second joining part can in particular also form a delivery wheel, for example a toothed wheel of a gear pump or an impeller of a vane cell pump or pendulum vane pump. The second joining part can also be a drive wheel for a pump, for example of the type mentioned. Finally, the same shaft can also form a joining or pressing composite according to the invention with a plurality of second joining parts, for example a drive wheel and a delivery wheel of a pump. The pump may in particular be a lubricating oil pump which supplies an internal combustion engine of the motor vehicle with lubricating oil, such as a tandem pump (oil / vacuum). The pump may for example also be a pump in a cooling circuit of the motor vehicle or a fuel pump or a pump for generating a hydraulic pressure for a hydraulic unit of the motor vehicle, for example an automatic transmission. Another preferred application example is a vacuum pump for a vehicle, for example for a brake booster. Yet another preferred example is the joining or press connection of a thumbwheel, preferably impeller, a camshaft phaser on or on its drive or output shaft, for example directly on or on a camshaft. The invention can be used with advantage for the assembly of gears or sprockets or pulleys in transmissions for the application. The invention is not only for automobiles, but also for other vehicles, such as ships, boats and aircraft advantageous, even for craft equipment and for carrier connections outside of the vehicle, for example in civil engineering, and generally everywhere where installation space is scarce.

Generally preferred developments:

The at least one joining surface has preferably been processed or processed by the laser processing method in such a way that a change in its surface condition has been caused, in particular that the at least one joining surface has been roughened or uneven and has protruding projections or particles on its surface.

Further, it is preferred that the pressing force causes a frictional connection between the first joining part and the second joining part, whereby a rotation between the first joining part and the second joining part is prevented about an axis, wherein the first joining surface and the second joining surface parallel or transverse, in particular are arranged at an acute angle or perpendicular with respect to the axis. The first and / or second joining surface may be conical, cylindrical or vertical with respect to the axis.

The joint connection is preferably formed on a shaft-hub connection. The longitudinal axis of the shaft may be the axis about which a rotation between the first joining part and the second joining part is prevented.

In the joint connection, a clamping means, such. Example, a nut or a screw may be provided, which causes a clamping or the pressing force with which the first and second joining surfaces are pressed together. The clamping force of the clamping device preferably acts in the direction of the axis. The clamping force can be the pressing force or the cause of the pressing force.

The second joining part may be a hub which surrounds the first joining part. The hub may be frictionally arranged on the first joining part in a press fit, a press fit, in particular a longitudinal press fit or a transverse press fit, or a self-locking or non-self-locking conical seat.

Advantageous features of the invention are also described in the subclaims and their combinations.

Hereinafter, embodiments of the invention will be explained with reference to figures. The features disclosed in the exemplary embodiments each form, individually and in each combination of features, the subject matters of the claims and also the claims advantageous embodiments described above. Show it:

1 for joining prepared joining parts for a first embodiment of a joining or pressing composite according to the invention;

2 a detail of 1 ;

3 for joining prepared joining parts for a second embodiment of a joining or pressing composite according to the invention;

4 a detail of 3 ;

5 for joining prepared joining parts for a third embodiment of a joining or pressing composite according to the invention;

6 the detail A of the 5 ;

7A the joining or pressing composite of the third embodiment in the joined state;

7B the joining or pressing composite of the third embodiment in an installed state;

7C a perspective view of the joining or pressing compound;

7D a plan view of the joining or pressing compound;

7E a plan view of the sprocket with inserted shaft;

8th the detail X the 7A ;

9 a lubricating oil pump in a cross section;

10 the pump in a longitudinal section;

11 A fourth embodiment of a joining or pressing composite according to the invention;

12 the fourth embodiment before joining;

13 the cut AA the 11 ;

14 the detail Z of 13 ;

15 an angle bandage;

16 the cut AA the 15 ;

17 for joining prepared joining parts for a fifth embodiment of a joining or pressing composite according to the invention;

18 the joining or pressing composite of the fifth embodiment;

19 the cut AA the 18 ;

20 the detail Y the 19 ;

21 a camshaft phaser; and

22 a conical seat configured with a joining or pressing composite according to the invention.

1 shows a first joining part 1 and a second joining part 2 , which are to be joined together to form a joint connection designed as a press connection. The press group serves to transmit a torque. The joining part 1 is a wave and the joining part 2 a hub of the later Pressverbunds. Shown is a rotation axis R of the press assembly. The joint connection is part of a shaft-hub connection.

At an axial end of the joining part 1 is around the rotation axis R circumferentially a cylindrical first joining surface 3 shaped, the joining surface 3 not necessarily be shaped at the end. The joining surface 3 is a shell outer surface of the joining part 1 and is formed by the cylindrical part of a shaft shoulder. The joining part 1 has at the front end of the shaft shoulder on an axial stop surface over which they from a larger diameter to the smaller diameter of the joining surface 3 drops. The axial stop surface for the joining part 2 is arranged transversely in the example shown, and in particular perpendicular to the axis R. The joining surface 3 is everywhere axially straight and axially smooth throughout.

The joining part 2 has a centric with respect to the axis of rotation R cylindrical through hole, which forms a second joining surface, on. The joining surface 4 is continuously axially straight and smooth and runs parallel to the axis R. The joining surface 4 forms a shell inner surface of the joining part 2 and is to the joining surface 3 congruent.

The parts to be joined 1 and 2 can be joined by means of longitudinal presses to form a Längspressverbunds or by means of transverse pressing to form a cross-press composite. Both types of joining presuppose that an interference fit, for example produced after, exists between the bore and the cylindrical part ISO 286 , ie, that the bore has a slightly smaller diameter than the cylindrical joining surface 3 ,

The parts to be joined 1 and 2 are made by stretching the joining part 1 or shrinking of the joining part 2 or both combined in combination with the press composite.

For the formation of Längspressverbunds the second joining part 2 on the first joining part 1 pushed along the axis R to the axial stop of the shaft shoulder. The fact that the diameter of the bore is slightly smaller than the diameter of the joint surface 3 , the bore of the second joining part expands 2 when pushing on elastic and the second joining surface 4 is characterized with distributed over its circumference to the axis R directed forces against the first joining surface 3 pressed.

For the formation of the Querpresserbunds the joining part 1 cooled or / and the joining part 2 heated, so that, due to the thermal shrinkage of the first part to be joined 1 and the thermal expansion of the second joining part 2 and how in 1 indicated, the diameter of the joint surface 4 in comparison to the joining surface 3 greater than the diameter of the joining surface 3 , In this state, the joining parts 1 and 2 positioned in joining position by the joining surfaces 3 and 4 axially overlapped, wherein the second joining part 2 preferably abuts against the axial stop of the shaft shoulder. The joining parts in joining position 1 and 2 are then joined together by temperature compensation, so that the shrink press fit or expansion fit based cross press bond is formed. Since a transverse compression composite can generally transmit higher torques than a longitudinal compression collar, a transverse compression collar is preferable to a longitudinal compression joint.

Before the parts to be joined 1 and 2 be positioned relative to each other in the joining position, at least or only one of the first joining surface 3 and the second joining surface 4 on their surface, for example, by surface full or partial irradiation by means of a laser 7 edited, in particular so edited that a change in their surface texture is caused. One of the joining surfaces 3 . 4 can be left unprocessed by the laser. In particular, the joining surface 3 so roughened or uneven, especially to laser marking 6 to produce or preferably a plurality of distributed over the joining surface (enlarged) elevations or projecting preferably with respect to its joining part 1 harder or hardened particles 8th train on the surface 3 melted and / or in the surface 3 at least partially melted down or, more generally, can be materially bonded to its adherend. The roughening can over the entire circumferential or joining surface 3 be performed circumferentially about the axis of rotation R or even partially, for example as a partial laser marking, be provided, for example, only a peripheral portion of the joint surface 3 laser marking and / or the laser marking or surface roughening of the joining surface 3 not over the entire axial length d of the joining surface 3 but only over a smaller area, such as d / 2 of the joining surface, for example, in the axially central region of the joining surface 3 or in an axial front or front or back or rear area of the joint surface 3 is provided. The processing of the second joining surface 4 can according to the processing of the first joining surface 3 respectively.

2 shows a part of the joining surface 3 in an enlarged view. The processing, in particular roughening of the joining surface 3 by at least partial irradiation or processing of the joining surface 3 by means of a laser 7 leads to the surface distributed training of enlarged unevenness or protrusions or particles on the surface 3 , which in the radial direction of the shaft 1 stand out and with the reference number 8th are provided.

The laser processing of, for example, made of metal, especially aluminum or steel joining 1 and or 2 can at the joining part 1 and or 2 surrounding air atmosphere or an atmosphere deviating from air. Due to the localized heating by the laser beam becomes an almost point-shaped area of the joining surface 3 strongly heated compared to the surrounding material and oxidized, for example, in the presence of oxygen. Local heating can change the material itself. For example, an atmospheric constituent may be incorporated in the material or bonded to the material. Alternatively or additionally, structural changes can be caused by the heating independently of the atmosphere. In particular, a surface deformation and thus the formation of a projection or particle 8th result, which cools after irradiation end and thereby preferably hardens and remains in its protruding form. Due to the short-term high temperature that reacts only locally melted surface material of the joining part 1 and or 2 with the ambient atmosphere and can thus be chemically altered, for example, oxidized, so that the resulting after cooling projection or particles 8th hardened, for example, compared to the non-irradiated material, that is harder.

Due to the shrinking or stretching process, the joining parts 1 and 2 frictionally connected with each other, wherein the joining surfaces 3 and 4 be pressed against each other. By pressing on each other, the laser-treated surface presses into the joining surface 4 or press or dig the ones from the joining surface 3 protruding bumps or particle 8th in the joining area 4 one. This will be the joining parts 1 and 2 about the particles 8th Microscopically seen also positively connected to each other, the expert in this case still a frictional connection between the Fügeteilen 1 and 2 understands. In any case, due to the friction joint or the buried or depressed particles 8th significantly increased the transmittable about the axis R torque.

In a variant, not shown, the hub or the second joining part 2 to form a clamping seat, instead of a ring or circumferentially continuous part, be a split or slotted part, so that the first part with a transversely with respect to its longitudinal direction, in particular skewed to the axis R arranged clamping means such. B. a screw which preferably passes through the slot can be clamped. The clamping means is tightened, whereby the second joining surface is pressed against the first joining surface or the first joining surface is clamped by the second joining surface.

3 shows the prepared for a joining or pressing composite of a second embodiment joining parts 1 and 2 in the same positions as in the 1 , The joining part 2 corresponds to the adherend 2 of the first embodiment. The joining part 1 is opposite the joining part 1 of the first embodiment with respect to its joining surface 13 modified. The joining surface 13 is not in this embodiment of the peripheral surface 3 smaller diameter, but from the shoulder, ie formed by the orbiting around the axis of rotation R shoulder end face. Accordingly, the joining surface 14 one of the joining surface 13 axially facing end face of the joining part 2 ,

4 shows a detail of 3 wherein, unlike the first embodiment, laser processing or roughening does not occur on the cylindrical surface 3 of the joining part 1 but instead at the front-side joining surface 13 , which is formed by the end face of the shaft shoulder and thus forms a second joining surface has been made.

It is noted that, of course, the first and second embodiments may be combined, that is, machining or roughening may occur at both joining surfaces 3 and 13 be made, so both on a circumferential surface and on a front-side surface. The process of joining or press-joining may correspond to the process explained with reference to the first embodiment. The parts to be joined 1 and 2 of the second embodiment are in the joining or pressing compound axially in the region of the joining surfaces 13 and 14 stretched against each other and by the friction compound of the pressed together peripheral surfaces 3 and 4 held in the tensioned state, so that the applied during joining axial clamping force due to the frictional engagement of the peripheral surfaces 3 and 4 preserved.

In a modification, the roughening, for example, by laser machining just in a corner, in which the front-side joining surface 13 in the cylindrical peripheral surface 3 passes, be present.

According to a further modification may additionally be a sealant or carrier mass with hard material particles contained therein according to the teaching of DE 10 2010 003 574 at a front-side joining surface 13 and / or a circumferential joining surface 3 and / or one in the 6 and 8th shown recess 5 be provided to the coefficient of friction between the parts to be joined 1 and 2 continue to increase.

5 shows the prepared for a joint connection of a third embodiment joining parts 1 and 2 and a clamping device 10 with which the joining parts 1 and 2 in the area of their joining surfaces 13 and 14 are mutually tensioned or pressed to produce the joint or screw. The wave heel is comparable to that of the 1 to 4 , which is why reference is made to it. The joining part 1 is another wave. The parts to be joined 1 and 2 become axially along the axis of rotation R with the joining surfaces 13 and 14 stretched towards each other. On the wave 1 sits torsionally stiff a gear 11 , The joining part forming a hub 2 is in addition to the gear 11 exemplified as a sprocket.

The joining part 1 falls again over an about the rotation axis R circumferential and transverse or perpendicular thereto arranged end face 13 on a cylindrical peripheral surface 3 smaller diameter. The end face forms, as in the second embodiment, the first joining surface 13 that of the second joining surface 14 of the second joining part 2 in the direction of the axis R faces. The joining surface 14 is formed by a transverse or perpendicular to the axis R standing face.

6 shows the joining area of the joining part 1 in an enlarged view (detail A). Before joining, the peripheral surface becomes 3 or preferably the frontal surface 13 machined or roughened by laser machining or for example partial laser marking to projections or particles 8th on the surfaces 3 and 13 train so that these particles 8th advantageous at least a majority of the joining surface 13 cover. In the transition area of the joint surfaces 3 and 13 and the cylindrical or optionally slightly conical peripheral surface 3 is optionally a recess 5 incorporated, the primary of the perfect fit of the parts to be joined 1 and 2 The optional but also a recording room for one from the DE 10 2010 003 574 well-known mixture 9 with hard material particles 8a can form. In particular, such a mixture 9 during pressing of the parts to be joined 1 and 2 inside in the recess 5 dodge into it.

The particles generated by laser irradiation 8th and those in the mix 9 contained particles 8a can consist of the same or different materials.

To make the joint connection, the joining part 2 over the axially short end portion of smaller diameter on the adherend 1 to the joining surface 13 pushed. The cylindrical peripheral surface 3 serves primarily the centering of the joining part 2 , The parts to be joined 1 and 2 are then using the clamping device 10 that is a screw in the example shown, axially clamped against each other. When tightening the screw a directed along the axis R pressing force is generated, with which the second joining surface 14 of the second joining part 2 against the first joining surface 13 is pressed. The longitudinal direction of the clamping device 10 extends along or even on the axis R. That the joining surfaces 13 and 14 Firmly pressed against each other is best in the 7 and 8th shown. The clamping device 10 is a bolt that fits into an internal bore of the joining part 1 is screwed and with its clamping or screw head along the axis R against the adherend 2 pressing for the contact pressure on the in the joint 5 the joining surfaces 13 and 14 optionally included mixture 9 provides. As in all other embodiments, the laser processing of the surface 13 and / or the area 14 the coefficient of friction between the surfaces 13 and 14 elevated. Alternatively or additionally, the area 3 and / or the area 4 be laser processed. 7A shows the joining or pressing compound of in 5 shown third embodiment in joined state and 7B in the installed state, where P shows the range of axial compression.

7C shows a perspective view of the joining or pressing composite, wherein a laser marking 6 preferably on the joining surface 3 in the area or at the transition to a flattening 3a and in particular a border area to the flattening 3a the otherwise circumferential round or annular joining surface 3 is provided.

Like from the 7D and 7E can be seen, a surface treatment or laser marking 6 preferably encircling the end face of an in 7D shown hub and at one in 7E shown sprocket 2 or whose hub may be provided. 8th shows an enlarged view of the detail "X" 7A ,

9 shows an external gear pump, on which the invention is realized, in a cross section. In a pump housing, a delivery chamber is formed, in the two conveyor wheels 11 and 12 are mounted rotatably about parallel axes of rotation R ₁ and R ₂ . The conveyor wheel 11 is rotated. The conveyor wheels 11 and 12 are in a conveying engagement with each other, so that in a rotary drive of the feed wheel 11 the conveying wheel thus in the conveying engagement 12 is also rotated. In the delivery chamber open on a low pressure side of an inlet 15 and on a high pressure side an outlet 16 for a fluid to be delivered. The housing wraps around the conveyor wheels 11 and 12 each over a portion of its circumference to form a narrow radial sealing gap. For the conveyor wheel 11 Further, the housing forms on each axial end face of the feed wheel 11 an axial sealing surface. The conveyor wheel 12 is facing axially facing at its two end faces each formed a further axial sealing surface. By rotary drive of the conveyor wheels 11 and 12 Fluid is passing through the inlet 15 sucked into the delivery chamber and from the conveyor wheels 11 and 12 along the respective loop on the high pressure side and there through the outlet 16 promoted to an aggregate to be supplied with the fluid.

In 10 takes the conveyor wheel 12 an axial position with an axial overlap, ie engagement length, which is reduced compared to the maximum engagement length. The conveyor wheel 12 is part of an adjustment unit. Examples of such pumps and their control are in the DE 198 47 132 C2 and the DE 102 22 131 B4 described.

The pump can be installed in particular in a motor vehicle and used there as a lubricating oil pump, which supplies an internal combustion engine of the motor vehicle with lubricating oil and is itself driven by the internal combustion engine. The drive is from the engine via a gearbox to one with the feed wheel 11 torsionally rigid connected pump shaft. The inventive features disclosed in the embodiments may also be implemented in other motor vehicle pumps or in the powertrain of other motor vehicle pumps or rotating automotive parts and in other applications in non-automotive applications, when it comes to creating a shaft-hub connection or a combination of waves that transmit a torque. In particular, two shafts can also be connected via a flange connection by means of a single or a plurality of clamping means (s) in the flange region and between the axially facing end faces of the flanges According to the invention, there is a surface roughening, for example by partial laser marking. In the case of shaft connections can be dispensed with additional, positively locking effective anti-rotation, such as split pins or tongue and groove connections when creating a joint connection according to the invention.

In the case of the pump, a joint assembly according to the invention can be realized in particular in two places: One of the joining parts 1 of the embodiments forms the driven pump shaft, and the respective joining part 2 forms the output gear of the transmission and at the same time the drive wheel of the pump shaft. In addition or instead, the conveyor wheel 11 with the pump shaft, ie the joining part 1 be connected according to the invention. The pump shaft 1 forms in such embodiments with the drive wheel 2 a first and with the conveyor wheel 11 a second joint assembly according to the invention. In the drive connection from the internal combustion engine to the pump further Reibschlussverbunde may be formed according to the invention, for example, to connect another drive or Abtriebsrad the transmission, such as sprocket of a chain drive, torsionally rigid with another wave. Instead of a chain drive or in addition may be included in the drive connection, a gear pair or a plurality of gear pairs, which are connected to each other with their respective drive or output shaft according to the invention. An inventive joint assembly for the connection of the pump shaft 1 in particular with the drive wheel respectively joining part 2 or with the conveyor wheel 11 contributes to the reduction in size, since the pump shaft slimmer and the central bore of the hub forming the joining part 2 or 11 smaller than in the case of a conventional connection.

While the first three embodiments demonstrated a joining or pressing combination for transmitting a torsional force or torque in each case using the example of a shaft connection, FIGS 11 to 14 in a fourth embodiment, a joint connection for the transmission of tensile forces F, possibly also compressive forces parallel to the joint. The parts to be joined 1 and 2 are tensile structures, in the exemplary embodiment tensile bars, which by means of bolts 10 connected to each other. The parts to be joined 1 and 2 are in an overlapping area, which forms the joint and extends parallel to the force to be transmitted, by means of the bolts 10 stretched against each other transversely to the direction of the force to be transmitted. Bolts 10 extend through the joints in the area of the joint 1 and 2 and are thus subjected to shear stress under tensile or compressive stress. The bolts form the clamping devices 10 the joint connection. In the exemplary embodiment are threaded bolts, each having a clamping head at one end and a thread for threaded engagement with a nut at the other end. The parts to be joined 1 and 2 be by means of these screw transverse to the force to be transmitted F with their joining surfaces 17 and 18 curious, how 11 and on average AA the 13 demonstrate.

12 shows the parts to be joined 1 and 2 before joining. In the overlapping area at least one of the joining surfaces 17 and 18 , In the exemplary embodiment, the joining surface 18 , processed according to the invention, in particular by means of a surface roughening or uneven-making process, such as a laser processing or laser marking machined to surveys or particles 8th as described above form. The clamping devices 10 be through the in the area of joining surfaces 17 and 18 provided holes and bolted to the nut, so that the joining surfaces 17 and 18 firmly pressed against each other, causing the surface elevations or particles 8th or at least part of this surface elevation or particles 8th in the joining area 17 Press in or dig in, as detailed in Z of 14 is shown. The hard particles 8th can also be during training or only when tightening the clamping means 10 stuck in the surface 18 anchored or pressed or buried. The surface elevation or particles 8th relieve in Joining compound in particular the clamping means 10 , whereby the transferable by the joining compound force F or the life of the joining composite increases or smaller in diameter clamping means 10 used and accordingly in the parts to be joined 1 and 2 the holes for the clamping devices 10 can be downsized. Of particular advantage is that the number of clamping devices 10 can be reduced.

The 15 and 16 show an angle association of two parts to be joined 1 and 2 , which are also exemplified rod-shaped. The angle bandage is stressed by means of a force F on bending. The parts to be joined 1 and 2 stand in an angle to each other in the association and are in the overlap area, the joint, by means of four clamping means 10 firmly connected. The clamping devices 10 are in the overlapping or crossing area of the parts to be joined 1 and 2 arranged so that they correspond to the right angle, the joining parts 1 and 2 form each other, are arranged in the corners of a rectangle.

17 shows the parts to be joined 1 and 2 for such an angle bandage before joining. The parts to be joined 1 and 2 have their joining surfaces in the overlapping or crossing area 17 and 18 on. At least one of the joining surfaces 17 and 18 , In the exemplary embodiment, the joining surface 17 , is by means of a surface roughening process, such as by means of a laser irradiation, worked to projecting firmly with the joining surface 17 connected bumps or particles 8th train. The parts to be joined 1 and 2 be in the area of their joining surfaces 17 and 18 by means of the clamping means 10 comparable to the fourth embodiment pressed against each other. The clamping devices 10 correspond to the clamping devices 10 of the fourth embodiment.

By joining the angular pressure composite of 18 to 20 , The surface elevation or particles 8th the joint surface 17 have due to the means of the clamping means 10 applied clamping forces in the joint surface 18 buried and transferred in the joined state a not inconsiderable proportion of the bending force F. Due to the compressed surface elevation or particles 8th can with less tensioning means 10 the same bending force F are transmitted. 15 shows an angle association with as already mentioned a total of four clamping means 10 in the area of the joint. 18 shows the angle bandage with only two clamping devices 10 that combined with the surface elevation or particles 8th a comparable large force F as the angular union of 15 with four clamping devices 10 can transfer. The numerical example of the four clamping devices 10 vs. two clamping devices 10 is only an example. In any case, with the same force F, it is possible to use at least one roughened joining surface 17 . 18 with hardened particles 8th either the number of clamping devices 10 reduced or it may be the clamping means 10 weak dimensioned and accordingly provided for this purpose holes in the Fügeteilen 1 and 2 be downsized. Conversely, with the same number of clamping devices 10 the transmittable bending force F can be increased.

21 shows a joint connection according to the invention (or joint assembly) on the embodiment of a camshaft phaser. The camshaft phaser is exemplified as a swing motor. The camshaft, the joining part in the joint assembly 1 is rotatably driven via the camshaft phaser by the crankshaft of the internal combustion engine. The camshaft phaser comprises a stator 20 with a drive wheel 21 , which is rotationally driven by the crankshaft, for example in the context of a chain drive or toothed belt drive. The camshaft phaser further comprises a rotor 2 , with the joining part 2 , respectively camshaft 2 , torque-resistant according to the invention is connected. The joining part 1 , respectively rotor 1 , is relative to the stator 20 over a certain range of rotation angle about the axis of rotation R of the camshaft 1 rotatable and relative to its relative rotational angular position, the phase position, relative to the stator 20 hydraulically adjustable to the rotational angle position of the camshaft 1 relative to the crankshaft and thus the closing or opening times of the camshaft 1 to be able to adjust controlled valves. The rotor 2 sits at the front end of the camshaft 1 on a peripheral surface 3 the camshaft 1 and is by means of a central clamping means designed as a central screw 10 axially against an end face 13 the camshaft 1 , respectively of the joining part 1 , pressed. The joint connection of the joining parts 1 and 2 may be formed according to the first embodiment or the second embodiment or the third embodiment or even a combination of two of these embodiments or all three embodiments or in a manner disclosed by at least one of the claims or the description as a whole. The joining surfaces available for the formation of a joint connection according to the invention are denoted by the reference numerals, as in the previous exemplary embodiments 3 and 4 for the peripheral surfaces and 13 and 14 designated for the faces. To the clamping device 10 be added that the clamping device 10 Advantageously, a central control valve for controlling the rotational angular position of the rotor 2 relative to the stator 20 can form and in such embodiments preferably as indicated via the camshaft 1 with the hydraulic pressure fluid, preferably engine oil, can be acted upon. In simplified versions, the clamping device 10 but only the function of a clamping device for the rotor 2 fulfill.

22 discloses a joint in the form of a conical seat. A wave 1 has a conical or frusto-conical outer surface 3 on, which corresponds to a first joint surface. On the surface 3 is a hub forming a second joining part 2 arranged, which has a conical or frusto-conical inner surface 4 which corresponds to a second joining surface forms. The joining surfaces 3 and 4 are thus arranged transversely, in particular at an acute angle to the axis R. The axis R corresponds to the shaft longitudinal axis and also the cone or cone longitudinal axis. The cone or cone angle of the surfaces 3 and 4 correspond with each other. On the tapered side of the surface 3 is a clamping device 10 , which is formed in the shape of a mother, but also as a screw, such as in the 5 . 7A and 21 , could be arranged. The mother 10 is with a threaded portion of the shaft 1 in a threaded engagement. By tightening the nut 10 this exerts a directed in the direction of the axis R pressing force on the hub 2 out, reducing the area 4 against the surface 3 is pressed. The surface presses 4 with a substantially cone angle and tightening force, but a force against the surface which is increased in comparison to the tightening force 3 , whereby a frictional connection is made. The cone angle can be chosen so that between the first joining part 1 and the second joining part 2 Self-locking exists, ie that when loosening the nut 10 the frictional connection remains, or there is no self-locking, ie that when loosening the nut 10 also the frictional connection is released.

• – bei einem vorgegebenen Anziehmoment des Spannmittels 10 und einem vorgegebenen Kegelwinkel das über die Fügeverbindung übertragbare Drehmoment erhöht werden, oder
• – bei einem vorgegebenen Anziehmoment des Spannmittels 10 und einem vorgegebenen zu übertragenen Drehmoment der Kegelwinkel verändert, d. h. vergrößert werden (der Kegel wird steiler), oder
• – bei einem vorgegebenen zu übertragenden Drehmoments und einem vorgegebenen Kegelwinkel das Anziehmoment des Spannmittels verringert werden, wodurch das Spannmittel geringer dimensioniert werden kann, oder

der Kegelwinkel, bis zu dem Selbsthemmung auftritt, gesteigert werden (Kegel wird steiler).By the inventive treatment and change the surface texture or structure of the surfaces 3 or and 4 a laser allows the friction coefficient, in particular the static friction coefficient between the surfaces, to be determined 3 and 4 increase. This can be advantageous:

• - At a predetermined tightening torque of the clamping device 10 and a predetermined cone angle, the transferable via the joint connection torque can be increased, or
• - At a predetermined tightening torque of the clamping device 10 and a predetermined torque to be transmitted, the cone angle changed, ie increased (the cone is steeper), or
• - At a given torque to be transmitted and a predetermined cone angle, the tightening torque of the clamping means can be reduced, whereby the clamping means can be made smaller, or

the cone angle, up to which self-locking occurs, can be increased (cone becomes steeper).

The embodiments in which the frictional engagement between end faces or conical surfaces is generated, the joint connection can also be easily separated and reassembled, d. H. the joint connection can be mounted several times.

LIST OF REFERENCE NUMBERS

1

adherend

2

adherend

3

Joining surface, peripheral surface

3a

Flattening, joining surface

4

Joining surface, peripheral surface

5

recess

6

laser marking

7

laser

8th

Lead / bump / hard material particles

8a

Hard particles

9

mixture

10

clamping means

11

Conveyor wheel, gear

12

Conveyor wheel, gear

13

Joining surface, face

14

Joining surface, face

15

pump inlet

16

pump outlet

17

joining surface

18

joining surface

19

20

stator

21

drive wheel

P

Range of axial compression

R

axis of rotation

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102010003574 [0003, 0017, 0017, 0024, 0081, 0084]
• DE 19847132 C2 [0090]
• DE 10222131 B4 [0090]

Cited non-patent literature

• ISO 286 [0068]

Claims (18)

Joining connection, comprising a) a first joining part ( 1 ) with a first joining surface ( 3 . 13 . 17 ), b) a second joining part ( 2 ) with a second joint surface ( 4 . 14 . 18 ), with the first joining part ( 1 ) is connected by pressing force, wherein the first joining surface ( 3 . 13 . 17 ) and the second joint surface ( 4 . 14 . 18 ) are at least partially adjacent to each other, characterized in that c) at least one of the joining surfaces ( 3 . 13 . 17 ; 4 . 14 . 18 ) has been processed at least partially by means of a laser processing method. Joining connection according to claim 1, characterized in that the at least one joining surface ( 3 . 13 . 17 ; 4 . 14 . 18 ) was processed with the laser processing method that a change in their surface condition was caused, in particular that the at least one joining surface ( 3 . 13 . 17 ; 4 . 14 . 18 ) or is roughened or uneven, and has protrusions or particles ( 8th ) wearing. Joining connection according to one of the preceding claims, characterized in that the pressing force a frictional connection between the first joining part ( 1 ) and the second joining part ( 2 ), whereby a rotation between the first joining part ( 1 ) and the second joining part ( 2 ) about an axis (R) is prevented, wherein the first joint surface ( 1 ) and the second joint surface ( 2 ) are arranged parallel or transversely, in particular at an acute angle or perpendicular with respect to the axis (R). Joining connection according to the preceding claim, characterized in that the first and / or second joining surface ( 1 . 2 ) is conical, cylindrical or vertical with respect to the axis (R). Joining connection according to one of the two preceding claims, characterized in that the joining connection is comprised by a shaft-hub connection, wherein the longitudinal axis of the shaft ( 1 ) the axis (R) is about the one rotation between the first joining part ( 1 ) and the second joining part ( 2 ) is prevented. Joining connection according to one of the three preceding claims, characterized by a tensioning means ( 10 ), such. Example, a nut or a screw which causes the pressing force, with the first and second joining surface ( 3 . 13 . 17 ; 4 . 14 . 18 ) are pressed together, wherein the clamping force of the clamping means ( 10 ) preferably in the direction of the axis (R) acts. Joining connection according to one of the four preceding claims, characterized in that the second joining part ( 2 ) is a hub, which the first joining part ( 1 ), wherein the second joining part ( 2 ) in a press fit, a press fit, in particular a longitudinal press fit or a transverse press fit, or a self-locking or non-self-locking tapered fit on the first joining part ( 1 ) is arranged frictionally. Joining connection according to one of the preceding claims, characterized in that the joining part ( 1 . 2 ), where its joining surface ( 3 . 13 . 17 ; 4 . 14 . 18 ) was laser-worked, or at the surface of at least one of the joining surfaces ( 3 . 13 . 17 ; 4 . 14 . 18 ) protruding elevations or particles ( 8th ) harder than the material of the unprocessed areas of the joint surface ( 3 . 13 . 17 ; 4 . 14 . 18 ) and / or the mating surface adjacent to the joining surface ( 3 . 13 . 17 ; 4 . 14 . 18 ) are. Joining connection according to one of the preceding claims, characterized in that the first joining part ( 1 ) a shaft or a rotatably connected to the shaft part and the second joining part ( 2 ) also a shaft or a hub, such. B. one of a sprocket, a toothed belt pulley, a drive gear or a balance weight and the joining surfaces ( 3 . 13 . 17 ; 4 . 14 . 18 ) or by or by the joining surfaces ( 3 . 13 . 17 ; 4 . 14 . 18 ) formed joint a torque is transferable. Fastening connection according to one of the preceding claims, characterized in that the pressing compound is part - a pump, which is the supply of an aggregate of a motor vehicle with a fluid or a negative pressure, preferably an internal combustion engine of the motor vehicle with lubricating oil, or - is a motor vehicle, one of Joining parts ( 1 . 2 ) is rotatably driven over the other preferably by a drive motor of the motor vehicle and the first joining part ( 1 ) a shaft and the second joining part ( 2 ) preferably a conveyor wheel ( 11 ) of a pump or a rotor ( 2 ) is a camshaft phaser or a drive wheel, for example, a sprocket, a pulley or a gear or a hub thereof. Joining connection according to one of the preceding claims, characterized in that the joining parts ( 1 . 2 ) for the transmission of a force, such as tensile force or bending force, by means of at least one tensioning means ( 10 ) that the fugue ( 17 . 18 ) are preferably interspersed, stretched towards each other and the at least one tensioning means ( 10 ) is stressed when applying the force with a transverse force acting transversely to this force, preferably to shear or torsion. Joining connection according to one of the preceding claims, characterized in that the joining surfaces ( 3 . 4 ; 13 . 14 ; 17 . 18 ) form at least a part of a joint and at least one tensioning means ( 10 ) the joining surfaces ( 3 . 4 ; 13 . 14 ; 17 . 18 ), wherein the tensioning means ( 10 ) is preferably claimed to train. Joining connection according to the preceding claim, characterized in that the at least one tensioning means ( 10 ) passes through the joint or the joint surfaces ( 13 . 14 ) are extended around an axis (R), preferably encircling, and the at least one tensioning means ( 10 ) the joining surfaces ( 13 . 14 ) parallel to the axis (R) to each other, wherein the joining surfaces ( 13 . 14 ) preferably around the at least one tensioning means ( 10 ). Method for producing a joint connection ( 1 . 2 ), in which a) a first joining part ( 1 ) with a first joining surface ( 3 . 13 . 17 ) and a second joining part ( 2 ) with a second joint surface ( 4 . 14 . 18 ), b) at least one of the joining surfaces ( 3 . 4 ; 13 . 14 ; 17 . 18 ) is at least partially processed by means of a laser processing method so as to cause a change in its surface condition, c) and the parts to be joined ( 1 . 2 ) with the joining surfaces ( 3 . 4 ; 13 . 14 ; 17 . 18 ) pressed against each other and thereby joined together non-positively. Method according to the preceding claim, characterized in that the laser processing in an ambient atmosphere of air or a non-ambient air atmosphere, such as. As oxygen, nitrogen or a hydrocarbon compound, in particular methane, or a mixture thereof is carried out, preferably to cause the change of the surface structure after or under the action of laser light, in particular on the surface of at least one of the joining surfaces ( 3 . 13 . 17 ; 4 . 14 . 18 ) Elevations or particles ( 8th ), at least in part from the surface of the parts to be joined ( 1 . 2 ) and preferably have a greater hardness than that at the surface of the untreated or unirradiated areas of the joining surface ( 3 . 13 . 17 ; 4 . 14 . 18 ) existing material. Method according to one of the preceding two claims, characterized in that a carrier mass ( 9 ), preferably an elastomer or natural rubber, and in the carrier mass ( 9 ) distributed hard material particles ( 8a ) at least on one of the joining surfaces ( 3 . 4 ; 13 . 14 ; 17 . 18 ) before pressing the parts together ( 1 . 2 ) are applied. Method according to one of the preceding three claims, characterized in that the second joining part ( 2 ) and in the joining by reducing its temperature in the frictional engagement with the first joining part ( 1 ) or the first part of the assembly ( 1 ) cooled and in the joining by increasing its temperature in the frictional engagement with the second joining part ( 2 ) is stretched. Method according to one of the preceding four claims, characterized in that the joining parts ( 2 ) by means of at least one tensioning means ( 10 ) in the area of the joining surfaces ( 3 . 4 ; 13 . 14 ; 17 . 18 ) are pressed against each other, preferably so firmly that at least one larger, preferably the predominant part of the elevations or hard material particles ( 8th . 8a ) in at least one of the joining surfaces ( 3 . 4 ; 13 . 14 ; 17 . 18 ), preferably each in both joining surfaces, buried or pressed.

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