US3780413A - Method for making hollow bevel gears with integral hollow shaft - Google Patents

Method for making hollow bevel gears with integral hollow shaft Download PDF

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Publication number
US3780413A
US3780413A US00283520A US3780413DA US3780413A US 3780413 A US3780413 A US 3780413A US 00283520 A US00283520 A US 00283520A US 3780413D A US3780413D A US 3780413DA US 3780413 A US3780413 A US 3780413A
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US
United States
Prior art keywords
blank
bevel gear
bore
integral
die
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.)
Expired - Lifetime
Application number
US00283520A
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English (en)
Inventor
M Burgdorf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KM Kabelmetal AG
Original Assignee
KM Kabelmetal AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KM Kabelmetal AG filed Critical KM Kabelmetal AG
Application granted granted Critical
Publication of US3780413A publication Critical patent/US3780413A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/03—Making uncoated products by both direct and backward extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/30—Making machine elements wheels; discs with gear-teeth
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/047—Extruding with other step
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49462—Gear making
    • Y10T29/49467—Gear shaping
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19949—Teeth
    • Y10T74/19958—Bevel

Definitions

  • the present invention relates to a process of making bevel gears by means of metal working.
  • the gear to be made is to have a body having configuration of a hollow truncated cone with a hollow shaft extending from the larger axial surface of the cone. More particularly, the invention relates to improvements in such processes wherein the gear is made through cold working a blank so as to obtain the desired configuration, and wherein the teeth extend from the frusto-conical body.
  • Bevel gears are used, for example, in the art of automotive engineering and here, particularly, in the gearing for the rear axle.
  • the bore through the shaft receives that axle and is usually provided with splines.
  • the intermediate product used as blank for the tooth forming process must permit filling of the bevel gear die in direction from the small diameter. Thus, this particularblank must not have a bore. If this intermediate blank has already an axial bore, the material will flow radially outwardly as the press ram or punch advances. Consequently, the blank will be deformed to have an outwardly bulging configuration resulting in an overlap at the bore during repressing the teeth. As the dimensions and tolerances of the already completed teeth must be maintained, subsequent forming steps must not move material into the region of these teeth. However, precisely that does occur when the hollow shaft portion is made through inverted extrusion whereby the teeth have to be held in a toothed die element. Therefore, it was previously necessary to make the bore subsequent to the cold working process of the gear and by means of cutting, such as drilling. Obviously, bevel gear with long shafts are very expensive to make in this manner and the process is also quite time consuming.
  • a bevel gear first through cold working, such as extrusion molding, but in solid configuration and with a solid integral shaft extending from the side with larger diameter of the gears. Subsequently, a bore is formed in the gear and shaft in that a core is extruded, beginning from the shaft end and as a direct extrusion process out of the gear through the front face of smallest diameter thereof, whereby the extruded core has slightly smaller diameter than the bore cold worked by the punch into the shaft.
  • machining is not involved to obtain the bore, nor is there the drawback resulting from using hollow blanks.
  • a die having contoured cavity corresponding to the bevel gear teeth.
  • the die has a bore beginning in the small diameter bottom of the die cavity, and having diameter smaller than the diameter of a punch acting from above for extruding a core from the bevel gear for obtaining the bore therethrough.
  • the die is provided with a conical extrusion shoulder where facing the punch. This shoulder was found to increase the life of the die, and it improves the extrusion flow conditions.
  • the FIGURE illustrates a die and punch for making a hollow bevel gear, showing the beginning of the process of bore making to the left, and showing a phase close to completion to the right of a central dividing line.
  • Blank 1 comprisesd of a body 2 of frustoconical configuration with an integral, short shaft 3.
  • Blank 1 has solid configuration and body 2 is already provided with teeth 4.
  • This blank 1 is placed into a die 5 having particularly a contour so as to matingly receive the teeth 4, crest, flank and root, in accurate contour fitting relation.
  • a sleeve 7 serving as plunge guide is placed onto the die 5 to supplement the die 5 as far as shaft 3 is concerned. The sleeve tightly receives the shaft and accordingly covers the die 5 completely.
  • the die 5 is provided with a bore 8 in the bottom and where facing the small diameter front face of the bevel gears.
  • the bore 8 has diameter smaller than an extrusion punch 6.
  • Bore 8 has a conical shoulder 10 at its upper end and is continued down in a bore 11 of somewhat larger diameter.
  • plunger or punch 6 is lowered (righthand side).
  • the punch has diameter corresponding to the diameter of the bore to be made in blank 1.
  • a core is extruded in that material in the interior of blank 1 flows out at the lower end of blank 1 and into bore 8.
  • the extruded core 9 is reduced. Core 9 is removed separately upon completion of extrusion.
  • Conical shoulder 10 improves the flow conditions from the blank into the core, and the shoulder also avoids damage to this upper edge of bore 8.
  • bore 8 has somewhat smaller diameter than punch 6, and the resulting bore in shaft and gears. This is necessary, as otherwise the material would not flow but break off. It can readily be seen that the centrally limited extrusion process does not disturb the configuration of the teeth as they have been formed previously, and the teeth are contour fittedly supported in die 5.
  • a bevel gear with integral solid shaft by means of cold working including making a frustoconical body with bevel gear teeth; and extruding from the bevel gear as a blank, a core through the small diameter surface of the bevel, through operation of a punch of larger diameter than the extruded core and acting on and through the integral shaft to obtain a bore therein.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
US00283520A 1971-09-02 1972-08-24 Method for making hollow bevel gears with integral hollow shaft Expired - Lifetime US3780413A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2144006A DE2144006C3 (de) 1971-09-02 1971-09-02 Verfahren zur Herstellung von Kegelzahnrädern

Publications (1)

Publication Number Publication Date
US3780413A true US3780413A (en) 1973-12-25

Family

ID=5818497

Family Applications (1)

Application Number Title Priority Date Filing Date
US00283520A Expired - Lifetime US3780413A (en) 1971-09-02 1972-08-24 Method for making hollow bevel gears with integral hollow shaft

Country Status (10)

Country Link
US (1) US3780413A (sv)
JP (1) JPS5614379B2 (sv)
BE (1) BE788203A (sv)
BR (1) BR7206013D0 (sv)
DE (1) DE2144006C3 (sv)
FR (1) FR2150945B1 (sv)
GB (1) GB1381037A (sv)
IT (1) IT967093B (sv)
NL (1) NL7210968A (sv)
SE (1) SE380457B (sv)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3895422A (en) * 1973-08-15 1975-07-22 Auto Specialties Mfg Co Screw jack pinion gear and method of making same
US4796457A (en) * 1984-07-26 1989-01-10 Daido Metal Company Ltd. Method and apparatus for producing flanged bush
US5245851A (en) * 1989-09-19 1993-09-21 M.H. Center Limited Differential pinion, metal mold for plastic working the same, and method for plastic working with the metal mold
WO1995019062A1 (en) * 1994-01-03 1995-07-13 Ateliers Thome-Genot Improved process for manufacturing alternator pole piece
US5867901A (en) * 1992-05-21 1999-02-09 Nichidai Corporation Method for producing a bevel gear shaft
FR2834763A1 (fr) * 2002-01-16 2003-07-18 Mecaniques Et Ind Speciales At Pignon planetaire de differentiel et son procede de fabrication
CN101780515B (zh) * 2009-12-23 2012-09-05 青岛三星精锻齿轮有限公司 精密锻造双驱动桥三联齿轮工艺
CN109550802A (zh) * 2018-12-14 2019-04-02 江西福格新能源传动技术有限公司 一种差速器齿轮轴向分流冷挤压成形装置与方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927192C2 (de) * 1979-07-05 1981-04-23 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Vorrichtung zum splanlosen Herstellen von metallischen Kegelzahnrädern
DE2927135B1 (de) * 1979-07-05 1980-09-11 Kabel Metallwerke Ghh Verfahren und Vorrichtung zum Herstellen von Kegelzahnraedern
IT1283320B1 (it) * 1996-03-29 1998-04-16 Microcochlea S R L Metodo di estrusione a spessore variabile e gruppo di estrusione secondo tale metodo
TWI289482B (en) * 2002-02-15 2007-11-11 Furukawa Sky Aluminum Corp An impact extrusion molded article, an impact extrusion molding method, and an impact extrusion molding apparatus
CN106040938A (zh) * 2016-06-02 2016-10-26 溧阳市金昆锻压有限公司 一种胎模锻造齿轮轴的组合模具及锻造工艺
CN112275980A (zh) * 2020-10-12 2021-01-29 瑞安市亚力汽车零部件有限公司 一种齿轮轴精度加工方法及该方法中使用的齿轮轴模具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1352911A (en) * 1919-08-01 1920-09-14 Pollak Steel Company Apparatus for forming forgings
US2964838A (en) * 1955-07-26 1960-12-20 Bluecher Wahlstatt Leichtmet Method of pressing bevel gear wheels and the like from steel
US3298219A (en) * 1963-04-24 1967-01-17 Bayerisches Leichlmetallwerk K Method and device for producing active profiles on bevel gears

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1352911A (en) * 1919-08-01 1920-09-14 Pollak Steel Company Apparatus for forming forgings
US2964838A (en) * 1955-07-26 1960-12-20 Bluecher Wahlstatt Leichtmet Method of pressing bevel gear wheels and the like from steel
US3298219A (en) * 1963-04-24 1967-01-17 Bayerisches Leichlmetallwerk K Method and device for producing active profiles on bevel gears

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Alien Property Custodian Publication, Serial No. 191, 168, Published April 27, 1943, Fritz Singer. *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3895422A (en) * 1973-08-15 1975-07-22 Auto Specialties Mfg Co Screw jack pinion gear and method of making same
US4796457A (en) * 1984-07-26 1989-01-10 Daido Metal Company Ltd. Method and apparatus for producing flanged bush
US5245851A (en) * 1989-09-19 1993-09-21 M.H. Center Limited Differential pinion, metal mold for plastic working the same, and method for plastic working with the metal mold
US5867901A (en) * 1992-05-21 1999-02-09 Nichidai Corporation Method for producing a bevel gear shaft
WO1995019062A1 (en) * 1994-01-03 1995-07-13 Ateliers Thome-Genot Improved process for manufacturing alternator pole piece
LT4118B (en) 1994-01-03 1997-03-25 Thome Genot Atel Improved process for manufacturing alternator pole piece
FR2834763A1 (fr) * 2002-01-16 2003-07-18 Mecaniques Et Ind Speciales At Pignon planetaire de differentiel et son procede de fabrication
WO2003060351A1 (fr) * 2002-01-16 2003-07-24 Ateliers Mecaniques Et Industries Speciales Pignon planetaire de differentiel et son procede de fabrication
US20040206151A1 (en) * 2002-01-16 2004-10-21 Guy Bostbarge Differential side gear and the production method thereof
US7093513B2 (en) * 2002-01-16 2006-08-22 Ateliers Mecaniques Et Industries Speciales Differential side gear and the production method thereof
CN101780515B (zh) * 2009-12-23 2012-09-05 青岛三星精锻齿轮有限公司 精密锻造双驱动桥三联齿轮工艺
CN109550802A (zh) * 2018-12-14 2019-04-02 江西福格新能源传动技术有限公司 一种差速器齿轮轴向分流冷挤压成形装置与方法

Also Published As

Publication number Publication date
SE380457B (sv) 1975-11-10
JPS4836056A (sv) 1973-05-28
GB1381037A (en) 1975-01-22
BE788203A (fr) 1972-12-18
DE2144006C3 (de) 1974-03-07
BR7206013D0 (pt) 1973-08-21
FR2150945B1 (sv) 1976-03-12
JPS5614379B2 (sv) 1981-04-03
DE2144006B2 (de) 1973-08-16
IT967093B (it) 1974-02-28
DE2144006A1 (de) 1973-03-15
FR2150945A1 (sv) 1973-04-13
NL7210968A (sv) 1973-03-06

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