US20040197219A1 - One-piece joint body - Google Patents

One-piece joint body Download PDF

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Publication number
US20040197219A1
US20040197219A1 US10/787,559 US78755904A US2004197219A1 US 20040197219 A1 US20040197219 A1 US 20040197219A1 US 78755904 A US78755904 A US 78755904A US 2004197219 A1 US2004197219 A1 US 2004197219A1
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United States
Prior art keywords
die
mandrel
fact
ball
charging
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.)
Abandoned
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US10/787,559
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English (en)
Inventor
Guido Degen
Wolfgang Schiemenz
Eberhard Ernst
Rainer Schmitt
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GKN Sinter Metals GmbH
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Individual
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Filing date
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Assigned to GKN SINTER METALS GMBH reassignment GKN SINTER METALS GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHMITT, RAINER, DEGEN, GUIDO, SCHIEMENZ, WOLFGANG, ERNST, EBERHARD
Publication of US20040197219A1 publication Critical patent/US20040197219A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/16—Both compacting and sintering in successive or repeated steps
    • B22F3/164—Partial deformation or calibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/022—Moulds for compacting material in powder, granular of pasta form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/028—Loading or unloading of dies, platens or press rams
    • 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
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor
    • B22F2003/033—Press-moulding apparatus therefor with multiple punches working in the same direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/16—Both compacting and sintering in successive or repeated steps
    • B22F3/164—Partial deformation or calibration
    • B22F2003/166—Surface calibration, blasting, burnishing, sizing, coining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/241—Chemical after-treatment on the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/248—Thermal after-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • 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
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D2003/22309—Details of grooves
    • 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
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D2003/22313—Details of the inner part of the core or means for attachment of the core on the shaft
    • 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
    • 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
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/12—Mounting or assembling

Definitions

  • Cardan joints that consist of an internal and external joint part are well-known. They primarily serve as the torsional moment conversion between shafts that are subjected to much larger shifts while in operation. The inclusion of axial shifts are thereby possible as well.
  • the cardan shaft is made of two joints and one intermediate shaft.
  • the intermediate shaft is mostly implemented as telescope shaft in order to compensate for elongations. It is a condition for a monotonous conversion that both joint forks are situated on one level and, in the event that the angles of deflection at both joint forks are the same sizes, at least in the most frequent situation while in operation.
  • a process was proposed for producing a metallic sintered component or forging, in particular an internal joint part of a Cardan joint, which is provided with a ball path, whereby a charge cavity is filled with powder, the charge cavity is delimited by means of a die, at least one molding mandrel and a charging mandrel positioned opposite the latter, a central mandrel, and at least one lower and upper punch; the powder is compressed in the charge cavity by pressure on the upper and/or lower punch to form a green product, which is then expelled and sintered.
  • Metallic sintered powder is introduced in the charge cavity.
  • the molding mandrel is pulled in until the charging mandrel, and the geometry of parts is fixed through a relative displacement of the tools against one another, and, subsequently, the powder is compressed by pressure in the upper and/or lower punch to form a green product.
  • the newly pressed green product is then expelled and sintered from the compression fixture.
  • a calibration process after the sintering and/or forging is possible to obtain lower tolerances and/or a partial compression. It is for example advantageous to drum the ball paths of the internal joint part coldly or, alternatively, to drum after the sinter forging.
  • Components that have been manufactured according to a sinter-metallurgic process have the advantage that all the bodies of the internal joint part form a high-strength structure that demonstrates excellent material features and surface quality.
  • the charging mandrel runs into the die in a charging position, the central mandrel runs into the die in a charging position and the lower punch is maintained in a charging position.
  • the molding mandrel that is attributed to the charging mandrel runs into the die, whereby the molding mandrel pushes the charging mandrel downward in the die and the ball paths are thereby shaped in powder through the geometry of the molding mandrel.
  • the upper punch runs into the die until at upper punch pressing position, and the powder is compressed to the green product whereby ball paths are created through the geometry of the die.
  • the lower punch runs into the die until at lower punch pressing position and also the powder is compressed.
  • the upper punch and molding mandrel extend from the die and the central mandrel is withdrawn from the green product during the discharge procedure.
  • the external outline of the internal joint part, the inner race is partially formed by the die itself and partially by molding mandrels moving in the pressing direction in the die.
  • the plan is that the side of the charging mandrel in the charging position, which is turned towards the molding mandrel, flushes with the top side of the die and the top side of the central mandrel, that the molding mandrel in the charging positions is positioned at the top side of the charging mandrel and pushes these back.
  • pressure is exercised on the upper punch, which runs into the die, and afterwards the upper punch and molding mandrel extend from the die and the newly pressed green product is expelled from the die through the lower punch.
  • the surface of the ball paths is compressed after the sintering procedure.
  • the compression of the surface in order to achieve a higher level of firmness can for instance take place through drumming, whereby it is advantageous when solely partitions of the ball path surface is compressed. It is appropriate if at least the contact surface of the balls of the ball path surface is compressed.
  • the ball compresses at least one partition. It is appropriate if the ball, which is preferably made of carbide, rolls at least once, particularly multiple times over the surface to be compressed, so that the surface is gradually compressed and deformed.
  • the readymade sintered part is subsequently forged whereby the sintered part is inserted in the die on a central mandrel by means of ball paths, a forging tool presses the sintered part for shaping purposes and for the external outline, and is afterwards expelled.
  • the readymade sintered part is calibrated following the sintering or forging procedure, whereby the sintered part is inserted in the die on a central mandrel by means of ball paths, a calibration tool presses the sintered part for shaping purposes and for the external outline, and is afterwards expelled.
  • An addition solution of the task is stated through a fixture for the manufacture of metallic sintered parts, in particular of an internal joint part of a cardan joint, with ball paths, with a pressing fixture, with at least one molding mandrel and at least one charging mandrel attributed to a molding mandrel, an upper and lower punch and a central mandrel that shape the charge cavity and are radially surrounded by a die.
  • a pressing fixture is characterized by a simple sequence of operations.
  • the pressing procedure is cost-effective and primarily time-saving in comparison to the known metal-cutting manufacture. As a result of this, it is possible to manufacture a large quantity of internal joint parts in short period of time.
  • the die that encloses the charging and molding mandrels intercepts the pressure that has a radial effect on the molding mandrels.
  • the task is further on solved by means of a metallic sintered part, in particular the internal joint part of a cardan joint, with ball paths positioned on the external perimeter, whereby the sintered part is made of one piece.
  • a metallic sintered part in particular the internal joint part of a cardan joint
  • ball paths positioned on the external perimeter
  • the sintered part is made of one piece.
  • the ball paths are positioned in an angle towards the pressing axle and/or curved towards the pressing axle.
  • the internal joint part is shaped with undercuts, cavities and profiles, preferably with ball paths that are axially aligned and radially curved towards the joint body axle, in other words, also towards the pressing direction.
  • the ball paths are hereby developed with track ground and track sides and the internal joint part demonstrates a geometry which enables it to press the internal joint part axially and to withdraw it from the pressing fixture and forging fixture, respectively.
  • the ball paths are roughly elliptically shaped. This definition is particularly advantageous, since the balls only bear on two points on the ball paths and results in only one contact line on the ball path during the roll motion. This area is presented as aforesaid, compressed advantageously and, if necessary, heat and/or surface-treated.
  • the ball paths are constructed with multiple cornerss. Also this design of the ball path offers the advantage, as is the case for the roughly elliptical ball path, that the balls only show a minor bearing area on the ball path and, as a result, the rolling friction decreases and in particular the Hertzian stress can be optimized.
  • the ball paths will indicate a higher density in partitions, particularly in the area of the ball contact surface.
  • the ball paths are heat-treated in partitions, particularly in the area of the ball contact surface.
  • Such a component features the advantage that the ball paths acquire a high level of firmness.
  • the component can for instance be heat-treated at least in the area of the ball paths by means of inductive and case hardenings.
  • the ball paths are surface-treated in partitions, especially in the area of the ball contact surface.
  • the surface for example can be treated in cold and warm conditions through shot peening, plasmanitriding, nitrocarburazing, phosphatizing and drumming in order to optimize the characteristics of the ball contact surface purposefully.
  • FIG. 1 A constant velocity cardan joint
  • FIG. 2 a perspective view of a compression molding die for an inner race
  • FIG. 3 the compression molding die cut with run-in Mandrels
  • FIG. 4 the compression molding die in the charging Position
  • FIG. 5 the compression molding die in the pressing Position
  • FIG. 6 the compression molding die in the discharge Position
  • FIG. 7 an inner race in top view
  • FIG. 8 an inner race according to section A-A in FIG. 7
  • FIG. 9 an inner race with ball in cross-section
  • FIG. 1 illustrates a constant velocity cardan joint 1 . It also shows external joint part 2 and internal joint part 3 . External joint part 2 is connected to shaft 4 , and internal joint part 3 is connected to shaft 5 . Shaft 4 and 5 form an propulsion-output system. Interior joint part 3 is included in external joint part 2 . Balls 6 in ball paths 7 are thereby positioned in such a way between external joint part 2 and internal joint part 3 , that balls 6 are directed against one another in ball paths 7 when bending shafts 4 , 5 . The balls run thereby inevitably in the mirror plane.
  • the displayed form shows that the bending angle is 0° and the ball is situated on a level vertically on the straight lines that were shaped by the axles of shafts 4 and 5 .
  • the alignment shows a cap ring 8 which retains the balls in the ball paths.
  • the output shaft is transferred also in case of corresponding bending within the possible limits with equal revolutions and torsional moment.
  • Cardan joint 1 has been sealed up outwards by means of flexible seal 18 .
  • Ball paths 7 can be positioned parallel or in an angle towards the pressing axle (inner race axle 20 ).
  • ball paths 7 are curved towards the pressing axle (inner race axle 20 ). As a result, radially curved ball paths 7 are a possibility whereby ball paths 7 are equipped with track ground 12 and track sides 13 .
  • FIG. 2 shows a perspective view of a pressing fixture 21 for inner race 3 (internal joint part), whereby pressing fixture 21 features three molding mandrels 22 . 1 , 22 . 2 , 22 . 3 and charging mandrels 23 . 1 , 23 . 2 , 23 . 3 attributed to these. Furthermore, a lower punch 24 , upper punch 25 , as well as central mandrel 26 are provided. The punches 24 , 25 and mandrels 22 , 23 , 26 are radially enclosed by die 27 . Die 27 , which encloses charging and molding mandrels 23 , 22 intercepts the pressure that has a radial effect on molding mandrel 22 .
  • Molding mandrel 22 and charging mandrel 23 that is attributed to the latter are run in cavities 28 . 1 , 28 . 2 in die 27 .
  • the charging and molding mandrels 23 , 22 and die 27 itself, which are positioned in cavities 28 . 1 , 28 . 2 make out the external outline of internal joint part 3 that based on its geometrical design cannot be manufactured with usual pressing fixtures.
  • FIG. 3 demonstrates a perspective view of pressing fixture 21 whereby molding mandrel 22 has run into die 27 . Molding mandrel 22 runs into die 27 during the pressing procedure, whereby molding mandrel 22 pushes charging mandrel 23 downward in die 27 , and whereby ball paths 7 of inner race 3 are changed into powder by means of the geometry of molding mandrel 22 .
  • FIG. 4 shows compression molding die 21 in charging position. It is intended that charging mandrel 23 runs into die 27 in a charging position for the charging procedure, that central mandrel 26 runs into the die in charging position and that lower punch 24 is maintained in charging position. Charge cavity 28 is filled with sintered powder 29 in charging position, whereby charge cavity 28 is delimited by die 27 , the three molding mandrels 22 . 1 , 22 . 2 , 22 . 3 and charging mandrels 23 . 1 , 23 . 2 , 23 . 3 attributed to these, central mandrel 26 , as well as by lower and upper punch 24 , 25 . While in charging position, the side of charging mandrel 23 that is turned towards molding mandrel 22 remains at equal height as top side 30 of die 27 and top side 31 of central mandrel 26 .
  • FIG. 5 demonstrates compression molding die 21 in pressing position. Molding mandrels 22 will run in until charging mandrels 23 , whereby molding mandrel 22 pushes charging mandrel 23 downwards in die 27 and, as a result, ball paths 7 of inner race 3 are changed to powder through the geometry of molding mandrel 22 .
  • upper punch 25 is run in die 27 until an upper punch pressing position so that the powder can be compressed to a green product, and whereby ball paths 7 are created also by the geometry of die 27 .
  • Lower punch 24 runs in until a lower punch position is attained, whereby also the powder is compressed.
  • Die 27 which encloses charging and molding mandrels 23 , 22 , intercepts the pressure that has a radial effect on molding mandrel 22 .
  • a displacement of the tools relatively against one another during the pressing procedure fixes the parts' geometry of inner race 3 .
  • the sintered powder is compressed to a green product with the application of heat.
  • die 27 and at least punch 24 , 25 can be heated up during the pressing.
  • FIG. 6 shows compression molding die 21 in discharge position.
  • Upper punch 25 and molding mandrel 22 are extended from die 27 during the discharge procedure.
  • Central mandrel 26 is retracted from green product 3 .
  • Readymade pressed green product is expelled from the die by means of lower punch 24 .
  • the compression of the ball path surface can for instance occur as a result of the fact that the surface of ball paths 7 is compressed by means of a ball after sintering, the pressure is exercised vertically onto the ball path area, whereby the ball at least one compresses at least a partition of ball path 7 . It is, however, advantageous if the ball, which preferably consists of hard metal, roll multiple times across the area to be compressed so that the surface can be gradually compressed and deformed.
  • FIG. 7 demonstrates inner race 3 in a top view.
  • Inner race 3 is made of one piece and, as a result, the firmness and durability of inner race 3 is high.
  • Ball paths 7 are positioned in an angle towards the pressing axle (inner race axle 20 ).
  • Inner race 3 shows in each case ball paths 7 attributed to one another in pairs.
  • Ball paths 7 are axially aligned within the image plane and demonstrate a radial bending 14 .
  • the curving 14 is opposed, in other words, ball paths 7 run towards one another in an axial direction.
  • Inner race axle 20 runs vertically towards the image plane through the center of inner race 3 .
  • FIG. 8 shows inner race 3 according to section A-A in FIG. 7.
  • FIG. 9 demonstrates ball path 7 with a ball 32 in section.
  • Ball 32 shows a round geometry.
  • Ball path 7 shows a geometry that is roughly elliptical.
  • Ball 32 runs on contact surface 16 , 16 ′ and has two points of contact 17 , 17 ′ on ball path 7 at all times. Every point of contact 17 , 17 ′ is situated on another track side 13 , 13 ′.
  • the points of contact 17 , 17 ′ are separated from one another in angle 2 ⁇ from the center of the ball.
  • This design is particularly advantageous, since balls 32 are positioned only on two points on ball path 7 and results in only one contact line on ball path 7 during the roll motion. Thus, as balls 32 only have a small bearing area on ball path 7 , it decreases the rolling friction.
  • the curving of ball 32 and of ball path 7 are optimized in such a way that the Hertzian stress is minimized.
  • This area is advantageously compressed and, if necessary, heat and/or surface treated.
  • Possible processes would be for instance inductive hardenings, case hardenings, shot peening, plasmanitriding, nitrocarburizing, phosphatizing and drumming in cold and hot conditions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Powder Metallurgy (AREA)
  • Forging (AREA)
  • Pivots And Pivotal Connections (AREA)
US10/787,559 2001-08-31 2004-02-26 One-piece joint body Abandoned US20040197219A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10142805A DE10142805C2 (de) 2001-08-31 2001-08-31 Einteiliger Gelenkkörper
DE10142805.7 2001-08-31
PCT/EP2002/009229 WO2003020460A2 (de) 2001-08-31 2002-08-17 Einteiliger gelenkkörper aus gesintertem metal

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/009229 Continuation WO2003020460A2 (de) 2001-08-31 2002-08-17 Einteiliger gelenkkörper aus gesintertem metal

Publications (1)

Publication Number Publication Date
US20040197219A1 true US20040197219A1 (en) 2004-10-07

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US10/787,559 Abandoned US20040197219A1 (en) 2001-08-31 2004-02-26 One-piece joint body

Country Status (10)

Country Link
US (1) US20040197219A1 (de)
EP (1) EP1420913A2 (de)
JP (1) JP4307256B2 (de)
KR (1) KR20040029079A (de)
CN (1) CN100444993C (de)
AU (1) AU2002342616A1 (de)
BR (1) BR0212106A (de)
DE (1) DE10142805C2 (de)
MX (1) MXPA04001689A (de)
WO (1) WO2003020460A2 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
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US20060063598A1 (en) * 2004-09-21 2006-03-23 Hitachi, Ltd. Support structure for bolting components of drive shaft via mounting member
US20110132057A1 (en) * 2006-09-04 2011-06-09 Miba Sinter Austria Gmbh Method of Compacting the Surface of a Sintered Part
EP2121221A4 (de) * 2007-02-12 2013-11-20 Gkn Sinter Metals Llc Pulvermetallschmiedestück sowie verfahren und vorrichtung zu seiner herstellung
CN103429922A (zh) * 2011-03-18 2013-12-04 Ntn株式会社 等速万向联轴器
WO2015001075A1 (en) * 2013-07-05 2015-01-08 Sandvik Intellectual Property Ab A method and device for manufacturing a cutting insert green body
US20170089393A1 (en) * 2015-04-23 2017-03-30 The Timken Company Method of forming a bearing component
US20180281063A1 (en) * 2015-09-18 2018-10-04 Gkn Sinter Metals Engineering Gmbh Punching Tool of a Sintering Press and Method Therefor
US11577312B2 (en) 2017-02-08 2023-02-14 Gkn Sinter Metals Engineering Gmbh Tool set having deflection compensation

Families Citing this family (8)

* Cited by examiner, † Cited by third party
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CN100358649C (zh) * 2003-05-09 2008-01-02 大众汽车有限公司 压力加工制造或成型制造螺旋形滚道的装置和方法
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AU2002342616A1 (en) 2003-03-18
JP4307256B2 (ja) 2009-08-05
CN100444993C (zh) 2008-12-24
CN1578709A (zh) 2005-02-09
DE10142805A1 (de) 2003-03-27
WO2003020460A3 (de) 2003-09-25
MXPA04001689A (es) 2004-05-31
JP2005501965A (ja) 2005-01-20
BR0212106A (pt) 2004-08-24
EP1420913A2 (de) 2004-05-26
DE10142805C2 (de) 2003-10-16
KR20040029079A (ko) 2004-04-03
WO2003020460A2 (de) 2003-03-13

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