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WO1990006197A1 - Procede et moule pour la coulee des arbres - Google Patents

Procede et moule pour la coulee des arbres Download PDF

Info

Publication number
WO1990006197A1
WO1990006197A1 PCT/CH1989/000136 CH8900136W WO9006197A1 WO 1990006197 A1 WO1990006197 A1 WO 1990006197A1 CH 8900136 W CH8900136 W CH 8900136W WO 9006197 A1 WO9006197 A1 WO 9006197A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
model
parts
seal
projecting part
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.)
Ceased
Application number
PCT/CH1989/000136
Other languages
German (de)
English (en)
Inventor
Alfred Tanner
Konrad Maier
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.)
Von Roll AG
Original Assignee
Von Roll 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 Von Roll AG filed Critical Von Roll AG
Priority to BR898907221A priority Critical patent/BR8907221A/pt
Priority to KR1019900701704A priority patent/KR910700107A/ko
Priority to DE8989907655T priority patent/DE58903049D1/de
Priority to AT89907655T priority patent/ATE83412T1/de
Publication of WO1990006197A1 publication Critical patent/WO1990006197A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor

Definitions

  • the invention relates to a method for casting waves, in particular slim waves, which also have projecting parts, especially eccentric, bearing and cam parts, which are cast to achieve certain material properties by means of at least one mold placed in the mold, and a casting mold Execution of the procedure.
  • molded waves are today lt in large numbers hergestel, particularly in the form of camshafts, 'which are required in the construction of internal combustion engines.
  • camshafts are made of steel, while cast camshafts are preferred for vehicle engines.
  • the invention relates to the field of cast shafts which are manufactured in large numbers.
  • Cast camshafts should be inexpensive and still have a high quality in terms of wear resistance and damping.
  • the processing effort should be as small as possible, which means that material additions must be aimed for that do not go beyond what is required as grinding allowance.
  • sand molds hergestel lt, wherein for attainment of certain material properties of the bearing parts and the cam molds or Schreckschaien be inserted .
  • the mold is usually in two parts and the mold is separated along the longitudinal axis of the camshaft. Accordingly, the model is also formed in two parts and the mold halves are molded together with the mold halves together with the molds.
  • the mold or the parts of the model interacting with the mold are provided in whole or alternatively with which the penetration of sand into the mold cavity and during casting of the mold during the production of the mold the occurrence of defects on the circumferential surface of the projecting parts and additions of material to the projecting parts are avoided.
  • the circumferential surfaces of the model of the shaft corresponding to the projecting parts of the shaft corresponding projecting parts of the shaft sealing means are arranged with which the gap between the model and the mold is closed. This ensures that no molding sand gets into the space between the mold and the model and can then lead to surface defects or defects in the cast camshaft.
  • the part of the mold which forms the peripheral surface of the projecting parts is expediently provided with a weapon-shaped corrugation. It is thereby achieved that the surface on the projecting part is improved, which is essential by preventing the formation of ice flowers, cold welding spots and other surface defects.
  • the model division for the Kokil le can be placed at the height of the vertical tangent point of the above game. It is thereby achieved that otherwise material additions occur in the shape division in the plane of the longitudinal axis of the shaft, for the removal of which additional machining work must be used.
  • Fig. 1 a view, partly in section, of a model plate with a model of a camshaft mounted thereon and molds attached to protruding parts of the camshaft
  • Fig. 2 shows a schematic spatial representation of a mold package with three molds
  • Fig. 3 shows a vertical section of a two-part mold in the area of two opposing molds.
  • the in Fig. 1 shown model shows a part of the model of a shaft 1 with protruding parts 2, 3, U.
  • the protruding parts 2, 3, 4 are cams, which are used on the finished Nockenwel le to control the intake and exhaust valves of an internal combustion engine.
  • the one on the wave model The above-mentioned parts 5, 6 are, for example, bearing parts which have a larger diameter than the basic diameter 7 of the willow model 1 and which are shaped in the casting mold by molding sand.
  • the above sections 5, 6 are sections with a circular diameter, but which is larger than the basic diameter 7 of the shaft of the model 1, or the camshaft.
  • molds 8, 9, 10 made of metal are placed, which form parts of the mold during the production of the casting mold.
  • the molds 8, 9, 10 can be individual molds, as shown in FIG. 1, but they can also be part of a mold package 12, see FIG. 2, in which the molds 8, 9, 10 are connected to one another by a web 14.
  • the first task is the need to prevent the appearance of surface defects or defects on the protruding parts of the camshaft designed as cam disks; because when the cast camshaft is finished, a faultless surface should be obtained after removing the material addition.
  • the sealing means 16 can be designed differently. They are arranged on the above parts so that at most one small, uncovered model part 17 remains. This uncovered model oil section should not exceed about 2 mm.
  • the sealing means are two O-rings 18 made of a relatively soft elastomer.
  • the sealing means is a flat seal 19, which is also made of a relatively soft elastomer.
  • the sealant is a lip seal 20. As with the O-ring seal 18, two such lip seals 20 are used to close the gap 15 at both ends.
  • the sealing means 16 are also removed when the model is removed.
  • Fig. 2 shows that the molds 8, 9, 10 are part of a mold package, which, however, need not be limited to three molds, but can also include further molds.
  • the advantage of using a mold package is that handling when molding the mold is made easier.
  • Fig. 3 schematically shows a further measure with which material additions can be avoided.
  • the model 1, which is used for the production of the mold, which is usually in two parts, is also produced as a two-part model, with one half each being attached to a model plate.
  • the plane is usually through Longitudinal axis 22 of the camshaft selected.
  • two mold halves 23, 24 are shown for the two mold halves, which are used as a mold for the production of one of the above-mentioned parts 2, 3, 4. Since these protruding parts are generally cams that have an eccentric part that is not in the parting plane 21, the upper mold half 23 must have an inner contour 25 at this point, which enables the mold half to be placed on the model.
  • the lower mold half 24 is therefore given an inner contour 26.
  • these two contour parts 25, 26 of the inner contour of the mold deviate from the outer contour 27 of the cam disc, so that a relatively large amount of material is added during casting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Mechanical Sealing (AREA)

Abstract

Sur le modèle (1) d'un arbre, des moyens d'étanchéité (16) sont disposés sur les parties en saillie (2, 3, 4), entourées par une coquille (8, 9, 10), de telle façon que l'intervalle (15) ainsi ménagé soit protégé contre toute pénétration de grains de sable. Ceci permet de réduire, dans une large mesure, les défauts en surface sur l'arbre moulé.
PCT/CH1989/000136 1988-12-06 1989-07-19 Procede et moule pour la coulee des arbres Ceased WO1990006197A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BR898907221A BR8907221A (pt) 1988-12-06 1989-07-19 Processo e molde para a fundicao de arvores
KR1019900701704A KR910700107A (ko) 1988-12-06 1989-07-19 축 주조용 주형 및 그 주조 방법
DE8989907655T DE58903049D1 (de) 1988-12-06 1989-07-19 Verfahren und giessform zum giessen von wellen.
AT89907655T ATE83412T1 (de) 1988-12-06 1989-07-19 Verfahren und giessform zum giessen von wellen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4526/88A CH677626A5 (fr) 1988-12-06 1988-12-06
CH4526/88-9 1988-12-06

Publications (1)

Publication Number Publication Date
WO1990006197A1 true WO1990006197A1 (fr) 1990-06-14

Family

ID=4277739

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1989/000136 Ceased WO1990006197A1 (fr) 1988-12-06 1989-07-19 Procede et moule pour la coulee des arbres

Country Status (9)

Country Link
EP (1) EP0401311B1 (fr)
JP (1) JPH03502553A (fr)
KR (1) KR910700107A (fr)
BR (1) BR8907221A (fr)
CA (1) CA2003962A1 (fr)
CH (1) CH677626A5 (fr)
ES (1) ES2017878A6 (fr)
GR (1) GR1000539B (fr)
WO (1) WO1990006197A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727565A (en) * 1928-03-09 1929-09-10 Wilcox Rich Corp Chill plate for use in molding tappet heads
GB2175521A (en) * 1985-05-31 1986-12-03 Perkins Engines Group Manufacture of metal castings having chill-hardened zones
EP0154787B1 (fr) * 1984-02-08 1988-03-30 G. Clancey Limited Améliorations concernant la coulée

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0675745B2 (ja) * 1984-09-27 1994-09-28 日産自動車株式会社 部分チルド鋳鉄鋳物製造用鋳型

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727565A (en) * 1928-03-09 1929-09-10 Wilcox Rich Corp Chill plate for use in molding tappet heads
EP0154787B1 (fr) * 1984-02-08 1988-03-30 G. Clancey Limited Améliorations concernant la coulée
GB2175521A (en) * 1985-05-31 1986-12-03 Perkins Engines Group Manufacture of metal castings having chill-hardened zones

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 249 (M-511)(2305), 27. August 1986; & JP-A-6178548 (Nissan Motor Ltd) 22. April 1986 *

Also Published As

Publication number Publication date
KR910700107A (ko) 1991-03-13
BR8907221A (pt) 1991-03-05
EP0401311A1 (fr) 1990-12-12
EP0401311B1 (fr) 1992-12-16
ES2017878A6 (es) 1991-03-01
GR1000539B (el) 1992-08-25
CH677626A5 (fr) 1991-06-14
CA2003962A1 (fr) 1990-06-06
JPH03502553A (ja) 1991-06-13
GR890100808A (en) 1991-03-15

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