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WO1999000204A1 - Procede et appareil de fabrication de tambours de freins - Google Patents

Procede et appareil de fabrication de tambours de freins Download PDF

Info

Publication number
WO1999000204A1
WO1999000204A1 PCT/US1998/013337 US9813337W WO9900204A1 WO 1999000204 A1 WO1999000204 A1 WO 1999000204A1 US 9813337 W US9813337 W US 9813337W WO 9900204 A1 WO9900204 A1 WO 9900204A1
Authority
WO
WIPO (PCT)
Prior art keywords
band
mold
mold apparatus
annular
further including
Prior art date
Application number
PCT/US1998/013337
Other languages
English (en)
Inventor
Garth Lawrence
David Phipps
Original Assignee
Garth Lawrence
David Phipps
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 Garth Lawrence, David Phipps filed Critical Garth Lawrence
Priority to AU82683/98A priority Critical patent/AU8268398A/en
Publication of WO1999000204A1 publication Critical patent/WO1999000204A1/fr

Links

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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/10—Drums for externally- or internally-engaging brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/02—Casting in, on, or around objects which form part of the product for making reinforced articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • 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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/1304—Structure
    • F16D2065/132—Structure layered
    • 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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/1304—Structure
    • F16D2065/1332—Structure external ribs, e.g. for cooling or reinforcement
    • 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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/134—Connection
    • F16D2065/1344—Connection permanent, e.g. by casting
    • 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
    • F16D2250/0007—Casting
    • F16D2250/0015—Casting around inserts

Definitions

  • the present invention relates generally to the manufacture of motor vehicle brake drums and, in particular, to the manufacture of such brake drums formed of a composite metal construction, for example of cast iron and steel.
  • the invention also relates to the mold apparatus used to form such a composite vehicle brake drum.
  • Motor vehicle brake drums are often formed entirely of cast gray iron.
  • cast gray iron is the preferred material for the braking surface of the brake drum
  • a full cast brake drum is relatively heavy.
  • composite brake drums have been developed which comprise a stamped steel drum back and a rolled steel annular band surrounding a cast iron braking surface.
  • these composite brake drums are manufactured by first forming an annular band from sheet steel stock which is then rolled to the desired configuration, typically having a radially inwardly-turned end flange and a plurality of outwardly directed strengthening ribs. With the annular steel band externally fixtured, molten gray iron is centrifugally cast therein to form a metallurgically bonded composite brake ring. After the ring has cooled, a steel drum back is generally welded to the flange. The radially inwardly directed braking surface of the ring is then finish machined.
  • the invention is a method of manufacturing a composite brake drum for a motor vehicle or the like which is comprised of a cast metal, preferably gray iron, drum section and a stamped metal, preferably steel, drum back and annular band surrounding the casting.
  • the steel drum back is positioned in a mold apparatus and molten iron is introduced into a mold cavity defined thereby.
  • the mold and band are maintained in a static condition during the casting process.
  • Fig. 1 is a diametrically sectioned perspective view of a finished brake drum in accordance with a preferred implementation of the invention
  • Fig. 2 is a sectional view of the mold apparatus of the invention.
  • Fig. 3 is a sectional view of the composite brake drum positioned within the mold apparatus of the invention.
  • the present invention relates to a method of manufacturing a composite brake drum for a motor vehicle or the like and a mold apparatus for use therewith. It is to be understood that the specific device illustrated in the attached drawings and described in the following specification is simply an exemplary implementation of the invention defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.
  • Fig. 1 a composite brake drum formed in accordance with the invention and generally designated by the reference numeral 10.
  • the composite brake drum 10 is comprised of an annular shell or band 12, preferably formed of steel, surrounding and metallurgically bonded to a cast gray iron structure or casting 14.
  • the steel band 12 and the gray iron casting 14 together form a composite brake ring 28 having a radially inwardly directed braking surface 30.
  • a drum mounting disc or back 16 is preferably connected to one edge of the band 12 by any known method such as welding. Alternatively, the band 12 and back 16 may be formed integrally, from a single piece of steel.
  • the back 16 has openings 18 and 20 for mounting the brake drum 10 in the conventional manner.
  • the steel band 12 includes a first peripheral edge 12a and a second peripheral edge 12b.
  • the second peripheral edge 12b includes a radially inwardly-turned end flange 22.
  • the steel band 12 further preferably includes a plurality of radially outwardly directed strengthening ribs 26.
  • the ribs are optional and may not be used.
  • the mold apparatus may be of any type suitable for static casting of the drum 10, such as the type used in sand casting, permanent mold casting, or lost foam casting, for example.
  • the mold apparatus denoted generally by reference numeral 40, preferably includes a sand core base 42 having an annular support surface 43 on which the steel band 12 rests.
  • a first annular shoulder 44 extends upwardly from the support surface 43 of the base 42.
  • the base 42 of the mold 40 also supports a sand core mold member 50 having an annular, vertically extending surface 51 for forming the inner diameter of the resulting gray iron casting 14.
  • the base 42 and mold member 50 may alternatively be formed of a monolithic construction such that they form a single piece.
  • the annular surface 51 extends upwardly from the first shoulder 44 of the base 42 to a second annular shoulder 52.
  • the height of the annular surface 51 is selected to substantially match the axial length of the band 12, so that the radially inwardly-turned flange 22 of the second peripheral edge 12b of the band 12 abuts the second shoulder 52 while the first peripheral edge 12a of the band 12 abuts the first shoulder 44.
  • the radially inner surface of the band 12 and the surface 51 of the mold member 50 together define a mold cavity 46 (shown in Fig. 2) for forming the cast gray iron casting 14.
  • the mold member 50 further includes an axially extending, centrally disposed passageway 53 providing communication between the upper surface of the mold member 50 and the recess 45 in the base 42.
  • the passageway 53 is preferably provided with a funnel-shaped opening 54 for receiving the molten iron, as described below.
  • the mold member 50 is also provided with a plurality of generally radially extending gates 55 providing communication between the passageway 53 or recess 45 in the base 42 and the mold cavity 46 defined by the band 12 and the annular surface 51.
  • the gates 55 are preferably formed though circumferentially spaced, radially extending ribs 56.
  • the ribs separate cavities 57 formed in the mold member 50 to reduce the mass of the mold member.
  • the ribs 56 and cavities 57 may not be used and the mold member may be essentially solid, or the mass of the mold member may be reduced using smaller cavities or other known techniques.
  • Vents are also provided to allow for the escape gas during the introduction of the molten metal.
  • the mold apparatus 40 also optionally includes a framework 60 which is spaced radially outwardly from the steel band 12 as it is positioned on the base 42.
  • the inner surface of the framework 60 and the respective outer surfaces of the base 42 and the steel band 12 define an insulating space 62 which may advantageously be filled with dry sand or other insulating material.
  • the dry sand or other material in the insulating space 62 serves to insulate the casting 14 to control the cooling rate thereof.
  • An annular weight 66 may also be preferably employed with the mold apparatus 40 of the invention.
  • the weight 66 is positioned so as to rest on the flange 22 of the band 12, urging the same downward into tight engagement with the first shoulder 44.
  • the annular weight 66 is sized so that the inner diameter thereof is spaced apart from the outer surface of the mold member 50.
  • any annular member may be used in place of the weight 66 to abut the flange 22 for urging the band 12 into tight engagement with the first shoulder 44.
  • a source of molten iron is provided (not shown) which communicates with a spout 70 or other suitable structure for delivering molten iron to the opening 54 in the mold member 50.
  • the band 12 is first formed from sheet steel stock and rolled to a configuration having the inwardly-turned end flange 22 and the strengthening ribs 26.
  • the band 12 is then positioned within the mold apparatus 40.
  • the first peripheral edge of the band 12 rests on the support surface 43 of the base 42 and the flange 22 of the second peripheral edge 12b abuts the second shoulder 52.
  • the annular weight 66 is positioned atop the flange 22 of the band 12 to maintain the tight engagement with the second shoulder 52.
  • the space 62 defined by the inner surface of the framework 60 and the respective outer surfaces of the base 42 and the steel band 12 is then filled with dry sand or other suitable material .
  • Molten iron is delivered to the spout 70, which directs the molten iron into the funnel-shaped opening 54 in the mold member 50.
  • the molten iron flows down the central passageway 53 into the recess 45 formed in the base 42. From the recess 45, the molten iron flows radially outwardly through the gates 55 into the cavity 46 defined by the inner surface of the band 12 and the surface 51 of the mold member 50, filling the same.
  • the steel band 12 Prior to the introduction of the molten iron, the steel band 12 may be heated and/or fluxed to improve the metallurgical bond between the band 12 and the gray iron casting 14. After the resulting composite brake ring 28 has sufficiently cooled, it is removed from the mold apparatus 40.
  • the drum mounting disc 16 is secured to the flange 22 by, for example, welding.
  • the drum mounting disc 16 may be formed integrally with the band 12 in the desired configuration prior to the casting of the gray iron structure 14, in which case the configuration of the mold member 50 and the weight 66 may require some modification from that shown in the drawings.
  • the radially inwardly directed braking surface 30 of the ring 28 is then finished on a cylinder of revolution coaxial with the mounting openings 18 and 20, as is conventional .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Braking Arrangements (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un tambour de frein composite (10) pour un véhicule à moteur ou un véhicule similaire, comprenant une partie tambour en métal coulé, de préférence en fonte grise, et une bande de tambour arrière et annulaire (12) en métal embouti, de préférence en acier, qui entoure la partie moulée (14). La partie arrière de tambour (12) en acier est placée dans un appareil de moulage (40), le fer en fusion étant introduit dans une cavité de moule (46) formée dans ledit appareil. L'appareil de moulage (40) et la bande (12) sont maintenus à l'état statique pendant le processus de moulage.
PCT/US1998/013337 1997-06-27 1998-06-26 Procede et appareil de fabrication de tambours de freins WO1999000204A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU82683/98A AU8268398A (en) 1997-06-27 1998-06-26 Method and apparatus for making brake drum

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5102497P 1997-06-27 1997-06-27
US60/051,024 1997-06-27

Publications (1)

Publication Number Publication Date
WO1999000204A1 true WO1999000204A1 (fr) 1999-01-07

Family

ID=21968894

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/013337 WO1999000204A1 (fr) 1997-06-27 1998-06-26 Procede et appareil de fabrication de tambours de freins

Country Status (2)

Country Link
AU (1) AU8268398A (fr)
WO (1) WO1999000204A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111120546A (zh) * 2020-01-18 2020-05-08 山东浩信昌盛汽车零部件智能制造有限公司 一种双金属复合制动鼓及其制造方法
CN115805293A (zh) * 2023-02-02 2023-03-17 莱州伟辰汽车配件有限公司 一种刹车毂铸造装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2218810A (en) * 1937-04-26 1940-10-22 Campbell Wyant & Cannon Co Method of making brake drums

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2218810A (en) * 1937-04-26 1940-10-22 Campbell Wyant & Cannon Co Method of making brake drums

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111120546A (zh) * 2020-01-18 2020-05-08 山东浩信昌盛汽车零部件智能制造有限公司 一种双金属复合制动鼓及其制造方法
CN115805293A (zh) * 2023-02-02 2023-03-17 莱州伟辰汽车配件有限公司 一种刹车毂铸造装置

Also Published As

Publication number Publication date
AU8268398A (en) 1999-01-19

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