WO2006090985A1 - Procede de fabrication d'un arbre-pignon et moule pour celui-ci - Google Patents

Procede de fabrication d'un arbre-pignon et moule pour celui-ci Download PDF

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Publication number
WO2006090985A1
WO2006090985A1 PCT/KR2006/000433 KR2006000433W WO2006090985A1 WO 2006090985 A1 WO2006090985 A1 WO 2006090985A1 KR 2006000433 W KR2006000433 W KR 2006000433W WO 2006090985 A1 WO2006090985 A1 WO 2006090985A1
Authority
WO
WIPO (PCT)
Prior art keywords
pinion shaft
correction
dimension
cross
section
Prior art date
Application number
PCT/KR2006/000433
Other languages
English (en)
Inventor
Sang-Duck Kwon
Original Assignee
Sang-Duck Kwon
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 Sang-Duck Kwon filed Critical Sang-Duck Kwon
Publication of WO2006090985A1 publication Critical patent/WO2006090985A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0264—Details of the structure or mounting of specific components for a camera module assembly
    • 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
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0235—Slidable or telescopic telephones, i.e. with a relative translation movement of the body parts; Telephones using a combination of translation and other relative motions of the body parts
    • H04M1/0237—Sliding mechanism with one degree of freedom
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/51—Housings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/20—Details of telephonic subscriber devices including a rotatable camera

Definitions

  • the present invention relates to a method of manufacturing a pinion shaft of a differential motion device which is used for a vehicle and a mold for dimension correction of a pinion shaft. More particularly, the present invention relates to a method of manufacturing a pinion shaft of a differential motion device which is used for a vehicle and a mold for dimension correction of a pinion shaft, in which a steel rod is drawn and cut and then a dimension correction operation for improving a dimension precision of a pinion shaft material which has been firstly worked through a chamfering operation and a coupling hole boring operation is done so that the pinion shaft material passes through correction holes of a mold for the dimension correction and is compressed, to thereby simplify a process of manufacturing a pinion shaft and prevent waste of a pinion shaft material, differently from a conventional pinion shaft manufacturing method of improving a dimension precision in which the pinion shaft material is bitten at and rotated around the headstock of a lathe to then polish the surface of the pinion shaft material.
  • a differential motion device is a device which divides an axle into left and right driving wheels and gives a difference in the rotating speeds of the left and right driving wheels to thereby smoothly travel on a curve and thus automatically control the rotating speed ratio of the left and right driving wheels.
  • the differential motion device includes right and left side gears, top and bottom pinion gears, and a pinion shaft through which the top and bottom pinion gears are axis-installed pinion in a differential case 10.
  • the pinion shaft is configured so that arcs of opposing portions facing each other are formed of cut circular cross-sections. Accordingly, a lubricant flows into the cut portion and the pinion gear is smoothly rotated.
  • a coupling hole where a fixing pin is inserted is formed in a lengthwise one side end.
  • the pinion shaft manufacturing method comprises a cross-section machining step of making a steel rod passed through a drawing portion of a die which is formed of a cross-sectional shape of the pinion shaft and drawn; a length machining step of cutting the drawn material in a certain length; a shape machining step of perforating a coupling hole through which a fixing pin is inserted into one side of the cut material and chamfering the corner in the cut material; a dimension correction step of precisely machining the material in order to improve a dimension precision of the pinion shaft material which has been primarily machined through the machining steps; and a thermal processing step and a surface coating step of the pinion shaft material in order to improve intensity and abrasion resistance of the pinion shaft.
  • the dimension correction step of minimizing a dimension tolerance in the external diameter or shape of the pinion shaft by precisely processing the surface of the pinion shaft material is made by a lathe and a grinding stone in the conventional pinion shaft manufacturing method. That is, a pinion shaft material is fixed to the headstock of a lathe and then a grinding stone is coupled with the tool post of the lathe. Then, the pinion shaft material is rotated together with the grinding stone, to thus polish the surface of the material, and machine the external diameter or the shape of the pinion shaft material to be accurately fit according to a designed dimension.
  • the pinion shaft material is cut longer than a length of the designed pinion shaft in order to fix the pinion shaft material to the headstock of the lathe, to thus form a headstock fixing portion, and then the headstock fixing portion should be cut again after surface grinding operation is finished to then match an original length of the pinion shaft.
  • the headstock fixing portion should be cut again after surface grinding operation is finished to then match an original length of the pinion shaft.
  • a pinion shaft manufacturing method comprising a cross-section machining step of making a steel rod passed through a drawing portion of a die which is formed of a cross-sectional shape of a pinion shaft and drawn; a length machining step of cutting the drawn material in a certain length; a shape machining step of perforating a coupling hole through which a fixing pin is inserted into one side of the cut material and chamfering the corner in the cut material; and a dimension correction step of precisely machining the material in order to improve a dimension precision of the pinion shaft material which has been primarily machined through the machining steps, wherein the pinion shaft material is pushed into a correction hole in dimension correction molds by a pushing device and is compressed while passing through the correction hole in the dimension correction step, to thus be machined into the dimension and shape on design, in which a number of correction protrusions protrude at a certain interval in order to form a hole whose
  • a dimension correction mold comprising: a correction hole whose dimension is larger than or has a similarity of that of the cross-section of the pinion shaft and which is formed by dimension correction molds, wherein a number of correction protrusions protrude at a certain interval on the inner surface of the correction hole in order to form the correction hole whose diameter is similar to or equal to that of the cross-section of the pinion shaft .
  • the inner cross-section dimensions of the correction protrusions become smaller so that a plastic deformation of the pinion shaft material is facilitated, and the inner cross-section dimension in the final correction protrusion is equal to or similar to a designed dimension of the pinion shaft.
  • FIG. 1 is a perspective view showing a pinion shaft of the present invention
  • FIG. 2 is a perspective view showing a drawn metal rod which is cut
  • FIG. 3 is a cross-sectional view illustrating a step of machining the surface of the cut metal rod.
  • FIG. 4 is an assembly view of a differential motion device including a pinion shaft according to the present invention.
  • the pinion shaft manufacturing method includes a cross-section machining step of making a steel rod passed through a drawing portion of a die which is formed of a cross-sectional shape of a pinion shaft 100 and drawn; a length machining step of cutting the drawn material 1 in a certain length; a shape machining step of perforating a coupling hole through which a fixing pin 3 is inserted into one side of the cut material 1 and chamfering the corner in the cut material 1; and a dimension correction step of precisely machining the material 1 in order to improve a dimension precision of the pinion shaft material 1 which has been primarily machined through the machining steps.
  • the pinion shaft material 1 is pushed into a correction hole 11 in dimension correction molds 5 and 5 ' by a pushing device and is compressed while passing through the correction hole 11 in the dimension correction step, to thus be machined into the dimension and shape on design.
  • a correction hole 11 whose dimension is larger than or has a similarity of that of the cross-section of the pinion shaft 100 is formed in dimension correction molds 5 and 5' .
  • a number of correction protrusions 6 protrude at a certain interval on the inner surface of the correction hole 11 in order to form the correction hole 11 whose diameter is similar to or equal to that of the cross-section of the pinion shaft 100.
  • the inner cross-section dimensions of the correction protrusions 6 become smaller so that a plastic deformation of the pinion shaft material 1 is facilitated, and the inner cross-section dimension in the final correction protrusion 6 is equal to or similar to a designed dimension of the pinion shaft 100.
  • the pinion shaft 100 smoothly rotates with pinion gears 2 and 2' on the axis of rotation of the pinion gears 2 and 2' in a differential motion device of a vehicle.
  • the pinion shaft 100 requires for a machining of a high precision in order to prevent a safety accident of the vehicle due to the pinion shaft 100 which is damaged when the pinion shaft 100 is rubbed with the pinion gears 2 and 2 ' .
  • the manufacturing process of the pinion shaft 100 according to the present invention is characterized in that a steel rod is drawn and cut and then a dimension correction operation for improving a dimension precision of a pinion shaft material 1 which has been firstly worked through a chamfering operation and a coupling hole 4 boring operation is done so that the pinion shaft material 1 passes through a correction hole 11 of a molds 5 and 5' for the dimension correction and is compressed.
  • the conventional dimension correction operation is done by grinding the surface of the pinion shaft material 1 using a lathe and a grinding stone chiefly.
  • Such a dimension correction operation due to the surface abrasion additionally requires an operation of forming a headstock fixing portion by cutting the material 1 longer than an original length of the pinion shaft 100, and an operation of cutting again the headstock fixing portion after finishing the surface abrasion work, as auxiliary operations for surface abrasion. Accordingly, a manufacturing process is complicated and a manufacturing time becomes long. Also, as a spare fixing portion is needed in order to make the pinion shaft material 1 bitten at the headstock of a lathe, the material 1 is wasted.
  • the pinion shaft material 1 is passed through a correction hole 11 formed by the molds 5 and 5' for dimension correction, in order to make dimension correction of the pinion shaft. Accordingly, the manufacturing process of the pinion shaft 100 becomes simplified and the manufacturing time thereof is reduced. The waste of the material 1 is prevented.
  • the present invention corrects the linearity of the pinion shaft 100 together with the effect of the dimension correction, which is done by an biting operation of the correction protrusions 6. This will be described with reference to FIG. 3.
  • the pinion shaft material 1 is advanced into to the correction hole 11 of the molds 5 and 5' for dimension correction by a pushing device.
  • the pinion shaft material 1 is advanced into the correction hole 11 while maintaining a horizontal level by the pushing device and the initial correction protrusion 6. If the pinion shaft material 1 is inserted to a certain depth, the portion which is bent is corrected while being supported by two or more correction protrusions 6.
  • the pinion shaft material 1 passing through the central part of the correction hole 11 has a moment at which a back-end thereof is supported by the final correction protrusion 6 in the outlet side of the correction hole 11.
  • straightness is accomplished by a separate support tool .
  • the pinion shaft material 1 escaping from the correction hole 11 is drawn out while being supported by the support tool separately like the pushing device. Therefore, since the pinion shaft material 1 is finally drawn while the leading end portion of the pinion shaft material 1 is supported together by the support tool although the pinion shaft material 1 has been supported by the final correction protrusion 6, the straightness is maintained as it is.
  • the dimension correction step will be described in more detail as follows.
  • the material 1 As the pinion shaft material 1 passes through a die having a drawing portion which is punched in the form of a cross-section size and shape of the pinion shaft 100, the material 1 is drawn.
  • a steel rod is drawn through the drawing portion in the form of a cross-section size and shape of the pinion shaft 100, the material 1 is not accurately machined in the form of a cross-section size and shape of the pinion shaft 100 on design, due to a machining error.
  • a dimension correction operation is performed. While the present invention pushes the pinion shaft material 1 by the pushing device and passes through the molds 5 and 5' for dimension correction, the pinion shaft material 1 is compressed to a certain dimension to thus correct dimension of the pinion shaft 100.
  • the correction hole 11 whose cross-section is greater than the cross-sectional shape of the pinion shaft 100 is punched in the molds 5 and 5' for dimension correction.
  • the size of the correction hole 11 becomes gradually small by the correction protrusions 6, and becomes the same size as that of the designed size of the pinion shaft 100 at the final stage of the correction protrusions 6.
  • the pinion shaft material 1 which is compressed while passing through the molds 5 and 5' for dimension correction is not plastically deformed by the molds 5 and 5' for dimension correction but is again restored to an original dimension by the internal elasticity of the pinion shaft material 1.
  • the correction protrusions 6 in the correction hole 11 are formed at a certain interval. Accordingly, the pinion shaft material 1 which is compressed while passing through the molds 5 and 5 1 for dimension correction is effectively compressed and plastically deformed, since a compression force which is left after plastically deforming the pinion shaft material 1 is discharged in the internal space where the correction protrusions 6 are not formed in the form of an elastic force.
  • the correction protrusions 6 are formed to compress the pinion shaft material 1 in order to fit for a designed cross-section dimension of the pinion shaft 100. Since the inner cross-section dimension of the correction protrusions 6 becomes small minutely as it goes to the outlet portion of the dimension correction molds 5 and 5 ' , the correction protrusions 6 are formed so that the pinion shaft material 1 is stepwise compressed to thus easily cause plastic deformation.
  • the inner cross-section dimension of the final correction protrusion 6 at the final end of the outlet is a dimension on design of the pinion shaft 100, or a dimension similar to the designed dimension considering a machining error at the machining process.
  • the pinion shaft material 1 passes through the molds 5 and 5 ' for dimension correction to then be compressed with the correction protrusions 6 a number of times, and is machined into a cross-section size which is required on design.
  • the pinion shaft 100 of the high dimension precision is completed.
  • the pinion shaft 100 provides a rotational axis of pinion gears 2 and 2 ' rotating at high speed, the high intensity and the high abrasion resistance are required.
  • the pinion shaft 100 is machined by using the material 1 made of steel.
  • the material 1 passes through a die having a drawing portion which is punched in the form of a cross-section size and shape of the pinion shaft 100, and drawn to become a long annular rod.
  • the material 1 of the annular rod shape is again cut down into the length of the pinion shaft 100 on design.
  • the present invention improves the dimension precision of the pinion shaft material 1 through a compression machining using the molds 5 and 5' for dimension correction. Accordingly, the present invention does not need a fixing unit for getting bitten by the headstock of the lathe differently from the conventional art.
  • the designed length of the pinion shaft 100 may be cut to thus prevent waste of the material 1.
  • a coupling hole 4 in which a fixing pin 3 is inserted is punched on one side end of the material 1 cut into the designed length of the pinion shaft 100, in which the fixing pin 3 fixed the pinion shaft 100 to a differential case 10.
  • the corners of the pinion shaft 100 are chamfered so that the pinion gears 2 and 2 ' which are inserted into the pinion shaft 100 are smoothly rotated.
  • a reference numerals 7 and 7' denote side gears
  • a reference numeral 8 denotes a thrust washer
  • a reference numeral 9 denotes a washer
  • the pinion shaft material 1 which is primarily machined in the form of the shape and dimension of the pinion shaft 100 by the coupling hole 4 being formed and chamfered after being drawn, passes through the dimension correction molds 5 and 5' to have a higher dimension precision, and compressed.
  • the dimension corrected pinion shaft material 1 is thermally treated to have a high hardness to endure the high speed rotation of the pinion gears 2 and 2' .
  • the pinion shaft material 1 is plated with metal having a high intensity and a high abrasion resistance, to enhance a material characteristic .
  • the present invention provides a method of manufacturing a pinion shaft of a differential motion device which is used for a vehicle and a mold for dimension correction of a pinion shaft, in which a steel rod is drawn and cut and then a dimension correction operation for improving a dimension precision of a pinion shaft material 1 which has been firstly worked through a chamfering operation and a boring operation of a coupling hole 4 is done so that the pinion shaft material 1 passes through a correction hole formed by dimension correction molds 5 and 5' and is compressed, to thereby simplify a process of manufacturing a pinion shaft 100 and prevent waste of the pinion shaft material 1, differently from a conventional pinion shaft manufacturing method of improving a dimension precision in which the pinion shaft material is bitten at and rotated around the headstock of a lathe to then polish the surface of the pinion shaft material .
  • the pinion shaft material 1 is cut longer than a length of the designed pinion shaft in order to fix the pinion shaft material to the headstock of the lathe, to thus form a headstock fixing portion, and then the headstock fixing portion should be cut again after surface grinding operation is finished to then match an original length of the pinion shaft, to thereby cause waste of the pinion shaft material.
  • the headstock fixing unit for getting bitten by the headstock of the lathe is not needed differently from the conventional art.
  • the designed length of the pinion shaft 100 may be cut to thus prevent waste of the material 1.
  • the present invention has been described with respect to a particularly preferred embodiment.
  • the present invention is not limited to the above embodiment, and it is possible for one who has an ordinary skill in the art to make various modifications and variations, without departing off the spirit of the present invention.
  • the protective scope of the present invention is not defined within the detailed description thereof but is defined by the claims to be described later and the technical spirit of the present invention.
  • the present invention provides a method of manufacturing a pinion shaft of a differential motion device which is used for a vehicle and a mold for dimension correction of a pinion shaft, to thereby simplify a process of manufacturing a pinion shaft and prevent waste of a pinion shaft material, differently from a conventional pinion shaft manufacturing method of improving a dimension precision in which the pinion shaft material is bitten at and rotated around the headstock of a lathe to then polish the surface of the pinion shaft material.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Multimedia (AREA)
  • Forging (AREA)
  • Retarders (AREA)
  • Gears, Cams (AREA)

Abstract

Cette invention concerne un procédé de fabrication d'un arbre-pignon d'un dispositif à mouvement différentiel qui est utilisé pour un véhicule, ainsi qu'un moule de correction de dimension d'un arbre-pignon permettant de simplifier un processus de fabrication d'un arbre-pignon et de prévenir le gaspillage de matériau d'arbre-pignon. Le procédé de fabrication d'un arbre-pignon comprend une étape d'usinage de section transversale, une étape d'usinage de longueur, ainsi qu'une étape de correction de dimension dans laquelle un certain nombre de protubérances de correction dépasse à intervalles donnés afin de former un trou dont la dimension est similaire ou égale à celle de l'arbre-pignon dans un trou de correction dont le diamètre est supérieur à la section transversale de l'arbre-pignon.
PCT/KR2006/000433 2005-02-24 2006-02-07 Procede de fabrication d'un arbre-pignon et moule pour celui-ci WO2006090985A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2005-0015319 2005-02-24
KR10-2005-0015319A KR100525265B1 (ko) 2005-02-24 2005-02-24 차동장치의 피니언샤프트 제조방법과 피니언샤프트 치수교정용 금형

Publications (1)

Publication Number Publication Date
WO2006090985A1 true WO2006090985A1 (fr) 2006-08-31

Family

ID=36927596

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2006/000433 WO2006090985A1 (fr) 2005-02-24 2006-02-07 Procede de fabrication d'un arbre-pignon et moule pour celui-ci

Country Status (2)

Country Link
KR (1) KR100525265B1 (fr)
WO (1) WO2006090985A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102107933B1 (ko) 2019-06-12 2020-05-07 임상홍 피니언샤프트의 선삭 가공방법
KR102180103B1 (ko) 2020-01-21 2020-11-17 임상홍 언발란스 제품 가공방법 및 가공용 지그

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6233011A (ja) * 1985-08-05 1987-02-13 Naniwa Seitei Kk 棒材の製造方法
JPH05154537A (ja) * 1991-12-10 1993-06-22 Nippon Steel Corp 金属線材の伸線方法および装置
US5575866A (en) * 1992-11-16 1996-11-19 Kabushiki Kaisha Kobe Seiko Sho Hot rolled steel wire rod, fine steel wire and twisted steel wire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6233011A (ja) * 1985-08-05 1987-02-13 Naniwa Seitei Kk 棒材の製造方法
JPH05154537A (ja) * 1991-12-10 1993-06-22 Nippon Steel Corp 金属線材の伸線方法および装置
US5575866A (en) * 1992-11-16 1996-11-19 Kabushiki Kaisha Kobe Seiko Sho Hot rolled steel wire rod, fine steel wire and twisted steel wire

Also Published As

Publication number Publication date
KR20050027105A (ko) 2005-03-17
KR100525265B1 (ko) 2005-11-02

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