EP3464920A1 - Carbonitrieren von gelenkkreuzbüchsen - Google Patents
Carbonitrieren von gelenkkreuzbüchsenInfo
- Publication number
- EP3464920A1 EP3464920A1 EP17724738.4A EP17724738A EP3464920A1 EP 3464920 A1 EP3464920 A1 EP 3464920A1 EP 17724738 A EP17724738 A EP 17724738A EP 3464920 A1 EP3464920 A1 EP 3464920A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- universal joint
- nitrogen
- joint bushing
- edge layer
- bushing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000005256 carbonitriding Methods 0.000 title claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 90
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 34
- 239000002344 surface layer Substances 0.000 claims abstract description 23
- 239000010410 layer Substances 0.000 claims description 60
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 30
- 238000009792 diffusion process Methods 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000005121 nitriding Methods 0.000 claims description 8
- 238000003754 machining Methods 0.000 claims description 5
- 229910000760 Hardened steel Inorganic materials 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000007514 turning Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 description 8
- 238000005496 tempering Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005255 carburizing Methods 0.000 description 4
- 241000239290 Araneae Species 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 for example Chemical compound 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000002347 wear-protection layer Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
- F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
- F16D3/382—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another constructional details of other than the intermediate member
- F16D3/385—Bearing cup; Bearing construction; Bearing seal; Mounting of bearing on the intermediate member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
- F16C33/7809—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for needle roller bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/26—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected
- F16D3/38—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another
- F16D3/40—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes
- F16D3/41—Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slidably connected with a single intermediate member with trunnions or bearings arranged on two axes perpendicular to one another with intermediate member provided with two pairs of outwardly-directed trunnions on intersecting axes with ball or roller bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/41—Couplings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0038—Surface treatment
Definitions
- the invention relates to a universal joint bush for universal joints for use in drive and steering shafts and a method for producing a universal joint.
- Universal joint bushes are commonly used in universal joints of a propeller shaft, with the universal joint being disposed between two shafts oriented at a flexion angle.
- each shaft is provided at the end with a yoke.
- a commercial spider includes four mutually offset by 90 ° pin, which connect the joint forks together, with two pins of a yoke are assigned.
- the pins are each used in pairs via a universal joint bush in conjunction with a needle ring as a radial bearing in the joint forks.
- the universal joint bushings known and used in the prior art are conventionally case hardened. However, these are subjected to increased wear at small pivoting angles and at the same time high pivoting frequencies, in particular on the side of the rolling body raceway on which needles of a needle bearing roll inside a universal joint bush. As a result, bearing damage, which makes it necessary to replace the universal joint bushings.
- a further object of the present invention is to specify a method for producing a universal joint bush, in which the bush body or the outer ring of the universal joint bushing has, as a result, optimized wear protection.
- a universal joint bushing for universal joints for use in drive and steering shafts an outer ring.
- needles of a needle ring roll off on said outer ring, whereby, for example, the universal joint bushing is rotatable about a pin of a spider.
- the outer ring preferably forms a rolling body raceway for, for example, a needle bearing.
- the outer ring has an edge layer formed by at least one measure for the diffusion of an element into near-surface regions of the universal joint bushing. It is advantageous here if the outer layer of the outer ring comprises nitrogen. In this way, the performance of universal joint boxes can be increased by means of nitrogen (or by means of carbonitriding).
- the universal joint bush according to the invention Due to the formation of a nitrogen-containing edge layer, the universal joint bush according to the invention, both in terms of their mechanical properties, in particular surface hardness, wear resistance, rollover resistance, etc., an excellent properties profile. Furthermore, the enriched with nitrogen edge layer causes a better tempering resistance and thus an additional wear protection / wear resistance of the raceway or the rolling body raceway and thus a longer life.
- the nitrogen-containing surface layer is formed by at least one measure for the diffusion of nitrogen into areas near the surface of the universal joint bushing.
- process parameters such as B. temperature, pressure, duration, concentration of the nitrogen content of an optionally necessary nitrogen atmosphere, can be made to influence the trainees or trained nitrogen-containing edge layer of the universal joint bushing.
- penetration depth of the nitrogen atoms as well as the concentration of the nitrogen atoms in the surface layer can be influenced or controlled in terms of process technology in this way.
- the nitrogen-containing edge layer has a predetermined layer thickness, advantageously in the range from 1 ⁇ m to 1.5 mm, in particular particular in the range of 1 m to 0.3 mm, preferably in the range of 1 to 50 pm.
- predetermined layer thicknesses are possible.
- the predetermined layer thickness vary depending on the wall thickness of the universal joint bushing. It is advantageous if z. B. at a wall thickness of 6 mm, a layer thickness of at least 1, 5 mm is achieved, whereas it is advantageous if, for example, at a wind thickness of 0.5 mm, a layer thickness of at least 30pm is achieved.
- the universal joint bushing with a comparatively smaller wall thickness also has a lower layer thickness of the boundary layer compared to the other joint cross bushing.
- the predetermined layer thickness in particular the aforementioned ranges, have the advantage of providing sufficient wear protection or wear resistance. Accordingly, for example, with the aid of the predetermined layer thickness, the universal joint bushing according to the invention can absorb the same mechanical forces as compared with a conventional universal joint bush, but a universal joint bush enriched with nitrogen in the surface layer has a much longer service life.
- a universal joint bushing has a core which is enclosed by the boundary layer.
- the surface layer has an increased nitrogen content relative to the core, in particular an increased nitrogen content of at least 0.04%.
- the aforementioned limit of an increased nitrogen content of at least 0.04% in the surface layer relative to the core ideally leads to increased wear resistance and preferably to an increased roll-over strength.
- the universal joint bush has a case-hardened steel or consists of case-hardening steel. It is advantageous if the case steel DC04, C15, 16MnCr5, 25CrMo4 and / or SCM415 is used. Of course, other case-hardened steels can also be used. Case-hardening steels or the aforementioned steels are ideal for optimizing the properties of a deep-drawn or even machined joint box.
- the universal joint bushing has a wall thickness in the range between 0.5 mm and 6 mm. This wall thickness allows easy production by deep drawing or a cutting process.
- a second aspect of the invention comprises a method for producing a universal joint bushing and / or for increasing the wear resistance of a universal joint bushing with a nitrogen-containing edge layer.
- the method comprises the following steps.
- An advantageous production step comprises the provision of a universal joint bushing made of a case hardening steel, in particular DC04, C15, 16MnCr5, 25CrMo4 and / or SCM415.
- a case hardening steel in particular DC04, C15, 16MnCr5, 25CrMo4 and / or SCM415.
- the provision may comprise deep-drawing a blank or a preform into a universal joint bushing, but also the machining production of a universal joint bushing from, for example, a preform.
- other manufacturing methods for creating the outer shape of a universal joint bushing are possible.
- a production step comprises carrying out at least one measure for the diffusion of nitrogen into near-surface regions of the universal joint bushing for forming the nitrogen-containing boundary layer.
- this measure it will, under appropriate conditions, be impurities, in particular special nitrogen, allows to diffuse into the microstructure of the provided universal joint box.
- the nitrogen-containing edge layer can be formed in the edge or near-surface areas of the universal joint bushing.
- the resulting change in the existing atomic microstructure of the universal joint bush in the region of the surface layer leads to increased hardness.
- the formation of a nitrogen-containing edge layer also improves further mechanical properties, in particular wear resistance or roll-over resistance.
- a thermochemical treatment of the universal joint bushing is preferably carried out.
- thermochemical treatment is carried out in a temperature range of at least 800 ° C. Said thermochemical treatment in said temperature range allows the diffusion of impurities, in particular of nitrogen, into the existing microstructure of the universal joint bush, which preferably has a case-hardening steel.
- thermochemical treatment By determining or adjusting the temperature applied during the thermochemical treatment, it is possible to influence the kinetics of the diffusion of nitrogen into the peripheral layer of the universal joint bushing. In this way, specific properties of the nitrogen-containing surface layer to be formed can be set in a targeted manner.
- temperature-related influences on the dimensional stability and / or surface quality or roughness of the universal joint bushing may have an effect, of course, knowing their abilities can be counteracted or they can be kept to a tolerable extent.
- the at least one measure for forming the nitrogen-containing edge layer is carried out in such a way that a nitrogen-containing edge layer having a predetermined layer thickness, preferably from 1 .mu.m to 0.3 mm, preferably from 1 to 50 .mu.m, formed.
- the predetermined layer thickness can preferably vary depending on the wall thickness of the universal joint bushing. It is advantageous if z. B. at a wall thickness of 6 mm, a layer thickness of at least 1, 5 mm is achieved, whereas it is advantageous if, for example, at a wind thickness of 0.5 mm, a layer thickness of at least 30pm is achieved.
- the universal joint bushing with a lower wall thickness compared to a lower layer thickness of the edge layer also compared to the other universal joint bushing.
- the predetermined layer thickness in particular the aforementioned ranges, have the advantage that a sufficient wear protection is provided. Accordingly, a universal joint bushing with the aid of the predetermined layer thickness created by the method according to the invention for producing a universal joint bushing can absorb the same mechanical forces in comparison to a conventionally produced universal joint bushing according to a known method. However, the universal joint bush enriched with nitrogen in the surface layer, according to the method presented here, a much longer life.
- the provision comprises deep-drawing or machining, in particular turning or milling, of a preform or of a blank, preferably of a forming part.
- a universal joint bushing can be prepared in advance of its completion before the subsequent step of performing at least one measure for the diffusion of nitrogen into near-surface regions of the universal joint bush to form the nitrogen-containing surface layer.
- the nitrogen-containing surface layer case hardening, preferably with the additional addition of nitrogen, in particular a carbonitriding process and / or plasma nitriding and / or gas nitriding and / or gas nitrocarburizing performed.
- nitrogen in particular a carbonitriding process and / or plasma nitriding and / or gas nitriding and / or gas nitrocarburizing performed.
- the processes can also be combined or carried out sequentially.
- the process plasma nitriding conventionally means a diffusion of nitrogen into the starting material to be treated.
- Gas nitriding is a thermochemical process in which the material to be treated, that is to say in particular to be cured, is heated to a temperature such that it contains a gas containing nitrogen, such as, for example, nitrogen. B. ammonia (NH3) is exposed, which then leads to the diffusion of nitrogen into the starting material.
- a gas containing nitrogen such as, for example, nitrogen.
- B. ammonia (NH3) is exposed, which then leads to the diffusion of nitrogen into the starting material.
- the gas nitrocarburizing allows the diffusion of nitrogen into the material to be treated, wherein the material to be treated is additionally exposed to a gas containing carbon (eg CO 2), ie a total of a gas mixture of a nitrogen and a carbon-containing gas and tempered accordingly.
- a gas containing carbon eg CO 2
- a carbonitriding process or carbonitriding is preferably understood as meaning a thermochemical process in which, advantageously, the surface layer of components is enriched by diffusion of carbon and / or nitrogen. As a result, an improvement in the mechanical properties of the component edge layer can be achieved.
- the carbonitriding process or the carbonitriding is based on a modified case-hardening, wherein preferably a coordinated tempering of the surface layer with respect to the microstructure composition can be adjusted to the application-specific loading.
- the carbonitriding process or the carbonitriding acts on the surface of a treated component and, within that, up to the so-called case hardening depth (CHD), wherein ideally the core of the component or universal joint bushing is not influenced.
- CHD case hardening depth
- the aim of the carbonitriding process is to produce a high C (carbon) and / or C + N martensitic (carbon and nitrogen) and / or N (nitrogen) surface layer higher Hardness and preferably a better tempering resistance.
- carrier media such as carrier gas + propane + NH4 or plasma (Glimmsaum) plus CH4 or C2H6, are used.
- the use of the carrier media takes place at a temperature of 850 ° C to 1050 ° C, which is preferably done over a period of 0.5 to 8 hours. Subsequently, the treated universal joint box is conveniently cooled in air.
- such treated universal joint boxes have case hardening depths (at least 700HV) of from 0.05 mm to several millimeters.
- case hardening depths at least 700HV
- universal joint bushings which are subjected to a carbonitriding process or a carburizing / carbonitriding, pretreated, preferably by case hardening or tempering for adjusting the core strength or hardening depth.
- the carbonitriding process or the carburizing / carbonitriding can be carried out in different plants, inter alia, for example, in continuous strip furnaces, discontinuously operating chamber furnaces, discontinuously operating plasma plants and / or multi-chamber plasma plants in the puncturing operation.
- At least one measure for work hardening such as, for example, cold forming, of the universal joint bushing is carried out before the at least one measure for forming the nitrogen-containing edge layer is carried out.
- the measures of work hardening a metallic material are preferably understood to mean the plastic deformation of metallic materials at a temperature below their respective recrystallization temperature.
- the plastic deformation of the material increases the dislocation density within the respective material, whereby an increase in the material hardness is due.
- This idea preferably relates - in simplified form - to the improvement of the mechanical properties, in particular the wear resistance or the wear protection of the raceway or the rolling body raceway and thus a longer service life, of universal joint bushes for the steering and drive train of a vehicle.
- the universal joint bushings are deep-drawn or machined.
- the invention is based on a prior art in which known universal joint bushes are conventionally case hardened.
- the present invention is preferably based on the problem of optimizing the sleeve body or a universal joint bushing in the direction of wear protection.
- Fig. 1 is a sectional view of a first embodiment of a
- FIG. 2 is a sectional view of a second embodiment of a universal joint box
- Fig. 3 is a sectional view of a third embodiment of a universal joint socket.
- FIG. 1 shows a first exemplary embodiment of a universal joint bush 1 for universal joints for use in drive and steering shafts of a vehicle, the universal joint bush 1 comprising an outer ring 2.
- the universal joint bush 1 essentially two vertical and one horizontal component, which are connected to each other, in particular integrally formed.
- the components mentioned together form a cup-shaped universal joint bush 1, wherein the illustrated horizontal component forms the outer ring 2.
- a rolling element of a needle bearing or a roller 3 of a needle bearing is arranged in the area between the three components. Consequently, the horizontal component or the outer ring 2, at least on the inside of the cup-shaped universal joint bush 1, forms a rolling body raceway on which the roller 3 can roll.
- the three components of the universal joint bushing 1 have different wall thicknesses WO (wall thickness of the bottom of the cup-shaped universal joint bush 1), W1 (wall thickness of the outer ring 2 of the universal joint bushing 1), W2 (wall thickness of a flanged edge on the open side the cup-shaped universal joint bush 1) - as shown in Figure 1 - have.
- Said wall thicknesses WO, W1, W2 or a wall thickness W of the universal joint bush 1 are / is preferably in the range between 0.5 mm and 6 mm.
- the outer ring 2 has an edge formed by at least one measure for the diffusion of an element into near-surface regions of the universal joint bush 1. simply R on.
- This boundary layer R of the outer ring 2 comprises nitrogen or is advantageously enriched with an increased proportion of nitrogen.
- the nitrogen-containing edge layer R has a predetermined layer thickness d, in particular, it is in the range of 1 pm to 0.3 mm, preferably in the range of 1 to 50 pm.
- the universal joint bush 1 comprises a core K, which is enclosed by the boundary layer R, wherein ideally the edge layer opposite the core K has an increased nitrogen content, in particular an increased nitrogen content of at least 0.04%.
- the universal joint bushing 1 shown in FIG. 1 can, for example, be deep-drawn and / or produced by means of a machining process.
- the universal joint bushing 1 has a case-hardening steel or consists of a case-hardening steel, DC04, C15, 16MnCr5, 25CrMo4 and / or SCM415 preferably being used as the case-hardening steel.
- a case-hardening steel or consists of a case-hardening steel, DC04, C15, 16MnCr5, 25CrMo4 and / or SCM415 preferably being used as the case-hardening steel.
- other steel grades can also be used for case-hardened steels.
- the universal joint bush 1, shown in Figure 1, by means of a method for producing a universal joint bushing 1 and / or to increase the wear resistance of a universal joint bushing 1 with a nitrogen-containing edge layer R produced.
- this method advantageously comprises the following steps.
- the first preferred step comprises providing a universal joint bush 1 made of a case hardening steel, in particular from DC04, C15, 16MnCr5, 25CrMo4 and / or SCM415.
- the provisioning further comprises deep drawing or machining, in particular turning or milling, of a preform or of a blank, preferably of a forming part.
- the excitingly produced or deep-drawn preform or the universal joint bushing 1 has a cup-shaped shape, as shown for example in Figures 1 -3, on.
- a subsequent or further step comprises carrying out at least one measure for diffusion / diffusion of nitrogen into near-surface regions of the universal joint bush 1 for forming the nitrogen-containing edge layer R.
- thermochemical treatment of the universal joint bush 1 is expediently carried out as at least one measure for forming the nitrogen-containing edge layer R, the thermochemical treatment preferably being carried out in a temperature range of at least 800 ° C.
- the at least one measure for forming the nitrogen-containing edge layer R is advantageously carried out in such a way that a nitrogen-containing edge layer R with a predetermined layer thickness d of preferably 1 pm to 0.3 mm, preferably from 1 to 50 pm, is formed.
- At least one measure for forming the nitrogen-containing surface layer R is case hardening, preferably with additional addition of nitrogen, in particular a carbonitriding process and / or plasma nitriding and / or gas nitriding and / or gas nitrocarburizing.
- Nitrogen can be introduced into near-surface regions of the universal joint bush 1 by means of the aforementioned methods.
- the universal joint bushings 1 in FIGS. 2 and 3 essentially have a different shape.
- these exemplary embodiments in FIGS. 2, 3 forego a second vertical component on the open side of the cup-shaped universal joint bushing 1.
- All of the abovementioned exemplary embodiments according to FIGS. 1 to 3 have in common that these universal joint bushes 1 represent the steering and drive train of a vehicle.
- the present invention is advantageously based on the problem of optimizing the sleeve body or the universal joint bushing 1 or its outer ring 2 in the direction of wear protection.
- nitrogen is additionally added to the conventional case hardening of the atmosphere. This causes a better tempering resistance and thus an additional wear protection of the track and thus a longer life.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016209782.2A DE102016209782A1 (de) | 2016-06-03 | 2016-06-03 | Carbonitrieren von Gelenkkreuzbüchsen |
PCT/DE2017/100300 WO2017206973A1 (de) | 2016-06-03 | 2017-04-12 | Carbonitrieren von gelenkkreuzbüchsen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3464920A1 true EP3464920A1 (de) | 2019-04-10 |
Family
ID=58744939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17724738.4A Withdrawn EP3464920A1 (de) | 2016-06-03 | 2017-04-12 | Carbonitrieren von gelenkkreuzbüchsen |
Country Status (5)
Country | Link |
---|---|
US (1) | US20190145467A1 (de) |
EP (1) | EP3464920A1 (de) |
CN (1) | CN109154330A (de) |
DE (1) | DE102016209782A1 (de) |
WO (1) | WO2017206973A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017109300A1 (de) * | 2017-05-02 | 2018-11-08 | Schaeffler Technologies AG & Co. KG | Beschichtungssystem für Gelenkkreuzbüchse |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7006022U (de) * | 1970-02-19 | 1970-06-18 | Gelenkwellenbau Gmbh | Wellenabdichtung. |
DE7006011U (de) * | 1970-02-19 | 1970-07-02 | Gelenkwellenbau Gmbh | Rollenlager, insbesondere fuer die lagerung der sternzapfen von kreuzgelenken. |
DE2232835C2 (de) * | 1972-07-04 | 1975-03-13 | Gelenkwellenbau Gmbh, 4300 Essen | Kreuzgelenk |
US6478682B1 (en) * | 1999-11-05 | 2002-11-12 | Ntn Corporation | Constant velocity universal joint |
JP2004108407A (ja) * | 2002-09-13 | 2004-04-08 | Koyo Seiko Co Ltd | 十字軸継手 |
DE102004048172A1 (de) * | 2004-10-02 | 2006-04-06 | Ina-Schaeffler Kg | Spanlos hergestelltes dünnwandiges rostfreies Lagerbauteil insbesondere Wälzlagerbauteil |
JP2009002388A (ja) * | 2007-06-19 | 2009-01-08 | Ntn Corp | トリポード型等速自在継手 |
JP5128423B2 (ja) * | 2008-09-05 | 2013-01-23 | Ntn株式会社 | バイポッド自在継手 |
KR101363845B1 (ko) * | 2009-01-16 | 2014-02-17 | 신닛테츠스미킨 카부시키카이샤 | 표면 경화강, 침탄 부품 및 표면 경화강의 제조 방법 |
CN102454715B (zh) * | 2011-08-12 | 2014-04-23 | 万向钱潮股份有限公司 | 一种十字轴万向节及其轴套的制造方法 |
CN103237913B (zh) * | 2011-12-06 | 2015-04-15 | 日本精工株式会社 | 滚动轴承及其制造方法 |
WO2014021958A1 (en) * | 2012-04-30 | 2014-02-06 | Roller Bearing Company Of America, Inc. | Hybrid bearing assembly with rolling elements and plain bearing |
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2016
- 2016-06-03 DE DE102016209782.2A patent/DE102016209782A1/de active Pending
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2017
- 2017-04-12 EP EP17724738.4A patent/EP3464920A1/de not_active Withdrawn
- 2017-04-12 US US16/097,952 patent/US20190145467A1/en not_active Abandoned
- 2017-04-12 WO PCT/DE2017/100300 patent/WO2017206973A1/de unknown
- 2017-04-12 CN CN201780031717.4A patent/CN109154330A/zh active Pending
Also Published As
Publication number | Publication date |
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WO2017206973A1 (de) | 2017-12-07 |
DE102016209782A1 (de) | 2017-12-07 |
CN109154330A (zh) | 2019-01-04 |
US20190145467A1 (en) | 2019-05-16 |
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