KR20050027105A - A manufacturing process of the pinion-shaft used differential gearing for a car and metallic pattern for size correction - Google Patents

A manufacturing process of the pinion-shaft used differential gearing for a car and metallic pattern for size correction Download PDF

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Publication number
KR20050027105A
KR20050027105A KR1020050015319A KR20050015319A KR20050027105A KR 20050027105 A KR20050027105 A KR 20050027105A KR 1020050015319 A KR1020050015319 A KR 1020050015319A KR 20050015319 A KR20050015319 A KR 20050015319A KR 20050027105 A KR20050027105 A KR 20050027105A
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KR
South Korea
Prior art keywords
pinion shaft
cross
workpiece
hole
size
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KR1020050015319A
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Korean (ko)
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KR100525265B1 (en
Inventor
권상덕
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권상덕
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Priority to KR10-2005-0015319A priority Critical patent/KR100525265B1/en
Publication of KR20050027105A publication Critical patent/KR20050027105A/en
Application granted granted Critical
Publication of KR100525265B1 publication Critical patent/KR100525265B1/en
Priority to PCT/KR2006/000433 priority patent/WO2006090985A1/en

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    • 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
    • H04M1/026—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
    • 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

Abstract

To provide a manufacturing method of automobile pinion shaft for simplifying pinion shaft manufacturing process and preventing waste of pinion shaft workpiece by pressing the workpiece through size correction dies on which correction hole with accurate cross sectional size of the workpiece is perforated and a metallic pattern for correcting size of the pinion shaft. The manufacturing method of automobile pinion shaft comprises a cross section processing step of drawing the steel rod by passing a steel rod through a die having a drawing part which is perforated in a cross-sectional shape of the pinion shaft; a length processing step of cutting the drawn workpiece(1) to a certain length; a shape forming step of perforating a clamping hole on a one side portion of the cut workpiece such that a fixing pin is inserted into the clamping hole and chamfering a corner portion of the workpiece; and a size correction step of precision processing the workpiece to improve size precision of a primarily processed pinion shaft work through the foregoing steps, wherein in the size correction step, the pinion shaft workpiece is pushed into a correction hole(11) of size correction dies(5,5') by a pusher so that the pinion shaft workpiece is processed to designed size and shape by passing the pinion shaft workpiece through the correction hole and pressing the pinion shaft workpiece in the correction hole. The metallic pattern for correcting size of pinion shaft is characterized in that a correction hole(11) having cross-sectional size and shape of the pinion shaft is formed in the metallic pattern, and a plurality of correcting protrusions(6) corresponding to the cross-sectional size of the pinion shaft are projected from the surface of the correction hole with the correcting protrusions being spaced from one another in a certain distance.

Description

차동장치의 피니언샤프트 제조방법과 피니언샤프트 치수교정용 금형{A manufacturing process of the pinion-shaft used differential gearing for a car and metallic pattern for size correction}A manufacturing process of the pinion-shaft used differential gearing for a car and metallic pattern for size correction}

본 발명은 차량에 사용되는 차동장치의 피니언샤프트 제조방법과 피니언샤프트 치수교정용 금형에 관한 것으로, 더욱 상세하게는 강봉이 인발되어 절단된 후 모따기작업 및 체결공 천공작업을 거쳐 일차가공된 피니언샤프트 소재의 치수정밀도를 향상시키기 위한 치수교정작업이 상기 피니언샤프트 소재가 치수교정용 금형의 교정홀을 통과하여 압착되면서 이루어지도록 함으로써, 피니언샤프트 소재를 선반의 주축대에 물려 회전시키면서 소재의 표면을 연마하여 치수정밀도를 향상시키는 종래의 가공법과 달리 피니언샤프트의 제조공정이 간소화되고, 피니언샤프트를 이루는 소재의 낭비도 방지한 차동장치의 피니언샤프트 제조방법과 피니언샤프트 치수교정용 금형에 관한 것이다.The present invention relates to a pinion shaft manufacturing method and a pinion shaft dimensional calibration mold of a differential device used in a vehicle, and more specifically, the pinion shaft primary processing through the chamfering work and the drilling hole drilling operation after the steel bar is drawn and cut As the pinion shaft material is pressed through the calibration hole of the mold for dimensional calibration, the surface of the material is polished while the pinion shaft is bitten by the spindle head of the lathe. The present invention relates to a pinion shaft manufacturing method of a differential device and a pinion shaft dimensional calibration mold, in which the manufacturing process of the pinion shaft is simplified, and the waste of the material forming the pinion shaft is prevented, unlike the conventional processing method of improving the dimensional accuracy.

일반적으로 차동장치는 차축을 좌우로 분할하여 좌우 바퀴의 회전 속도에 차이를 주어서 곡선을 원활하게 진행하도록 좌우 구동 바퀴의 회전 속도비를 자동적으로 조절해주는 장치로서, 통상 차동케이스 내부에 좌우 사이드기어와 상하 피니언기어 및 상기 상하 피니언기어를 통해 축설되는 피니언샤프트가 구비된다.In general, the differential device is a device that automatically adjusts the rotational speed ratio of the left and right driving wheels to smoothly progress the curve by dividing the axle to the left and right to give a difference in the rotational speed of the left and right wheels. The upper and lower pinion gear and the pinion shaft which is built up through the upper and lower pinion gear are provided.

여기서, 상기 피니언샤프트은 서로 마주보는 일정부분의 호가 절단된 원형단면으로 되어 있어 상기 절단부로 윤활유가 유동되면서 피니언기어가 원활히 회전되도록 하고, 길이방향 일측 단부에는 고정핀이 삽입되는 체결공이 형성되어 있다. Here, the pinion shaft has a circular cross section in which arcs of a predetermined portion facing each other are cut so that the pinion gear is smoothly rotated while lubricating oil flows to the cut portion, and a fastening hole is formed at one end in the longitudinal direction of the pinion shaft.

상기와 같은 피니언샤프트의 제조방법은 강봉을 피니언샤프트의 단면형상으로 된 다이(die)의 인발부로 통과시켜 인발하는 단면가공단계와, 인발된 소재를 일정길이로 절단하는 길이가공단계와, 절단된 소재의 일측부에 고정핀이 삽입되는 체결공을 천공하고, 소재의 모서리부를 모따기절단하는 형상가공단계와, 상기 단계를 거쳐 일차가공된 피니언샤프트 소재의 치수정밀도를 향상시키기 위해 소재를 정밀가공하는 치수교정단계와, 피니언샤프트의 강도와 내마모성을 향상시키기 위한 피니언샤프트 소재의 열처리단계와, 표면도금단계로 이루어져 있다.The manufacturing method of the pinion shaft as described above is a cross-sectional processing step for drawing the steel rod through the drawing portion of the die (shaped die) of the pinion shaft, a length processing step for cutting the drawn material to a predetermined length, and the cut Drilling the fastening hole is inserted into one side of the material, the shape processing step of chamfering the corners of the material, and through the steps to improve the dimensional precision of the pinion shaft material primarily processed It consists of a dimensional calibration step, a heat treatment step of the pinion shaft material to improve the strength and wear resistance of the pinion shaft, and a surface plating step.

여기서, 종래의 피니언샤프트의 제조방법에서 피니언샤프트 소재의 표면을 정밀하게 가공하여 피니언샤프트의 외경이나 형상의 치수공차를 최소화하는 치수교정단계는 선반과 연마석에 의해 이루어졌다.Here, in the conventional method of manufacturing the pinion shaft, the dimensional calibration step of minimizing the dimensional tolerances of the outer diameter or the shape of the pinion shaft by precisely processing the surface of the pinion shaft material was performed by the lathe and the abrasive stone.

즉, 피니언샤프트 소재를 선반의 주축대에 고정시키고, 공구대에 연마석을 결합시킨 후 상기 소재와 연마석을 함께 회전시켜 소재의 표면을 연마하면서 설계상의 치수대로 정확히 피니언샤프트 소재의 외경이나 형상이 맞추어지도록 하였다.That is, the pinion shaft material is fixed to the spindle headstock of the lathe, the abrasive stone is coupled to the tool bar, and then the material and the abrasive stone are rotated together to polish the surface of the material while the outer diameter or shape of the pinion shaft material is exactly matched to the design dimensions. To lose.

그러나, 상기와 같은 종래의 제조방법은 피니언샤프트 소재를 선반의 주축대에 고정시키기 위하여 상기 길이가공단계에서 소재를 설계상의 피니언샤프트 길이보다 일정길이 더 길게 절단하여 주축대 고정부를 형성시키고, 선반에서의 표면연마작업이 끝난 다음에는 상기 주축대 고정부를 다시 절단하여 원래의 피니언샤프트 길이로 맞추어야 했으므로, 작업과정이 복잡하고 번거로웠으며 소재가 낭비되는 문제가 있었다.However, in the conventional manufacturing method as described above, in order to fix the pinion shaft material to the spindle headstock of the shelf, the material is cut at a predetermined length longer than the design pinion shaft length in the length processing step to form the spindle head fixing portion, and the shelf After the surface polishing process in the end of the headstock was fixed to the original pinion shaft length by cutting again, the process was complicated, cumbersome and wasted material problem.

또한, 연마석으로 소재를 연마하면서 피니언샤프트 소재를 정확한 치수를 가공하는 작업이 높은 숙련도를 요구하는 한편 작업시간도 오래 걸리는 문제가 있었다.In addition, the process of processing the pinion shaft material with the correct dimensions while polishing the material with abrasive stone, there is a problem that requires a long time while working requires high skill.

본 발명의 목적은 상기와 같은 문제점을 해결하기 위하여 강봉이 인발되어 절단된 후 모따기작업 및 체결공 천공작업을 거쳐 일차가공된 피니언샤프트 소재의 치수정밀도를 향상시키기 위한 치수교정작업이 상기 피니언샤프트 소재가 치수교정용 금형의 교정홀을 통과하여 압착되면서 이루어지도록 함으로써, 피니언샤프트 소재를 선반의 주축대에 물려 회전시키면서 소재의 표면을 연마하여 치수정밀도를 향상시키는 종래의 가공법과 달리 피니언샤프트의 제조공정이 간소화되고, 피니언샤프트를 이루는 소재의 낭비도 방지한 차동장치의 피니언샤프트 제조방법과 피니언샤프트 치수교정용 금형을 제공하는데 있다.An object of the present invention is the pinion shaft material to improve the dimensional accuracy of the pinion shaft material first processed through the chamfering work and the fastening hole punching work after the steel bar is drawn and cut to solve the above problems The pinion shaft is manufactured by pressing through the calibration hole of the dimensional calibration die, and the pinion shaft material is rotated by the spindle head of the lathe while the surface of the material is polished to improve the dimensional accuracy. The present invention provides a pinion shaft manufacturing method for a differential device and a pin for dimensional calibration of a pinion shaft, which simplify and minimize the waste of materials forming the pinion shaft.

이하 본 발명을 첨부도면을 참조하여 보다 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

강봉을 피니언샤프트(100)의 단면형상으로 천공된 인발부를 가진 다이(die)로 통과시켜 인발하는 단면가공단계와, 인발된 소재(1)를 일정길이로 절단하는 길이가공단계와, 절단된 소재(1)의 일측부에 고정핀(3)이 삽입되는 체결공(4)을 천공하고, 소재(1)의 모서리부를 모따기절단하는 형상가공단계와, 상기 단계를 거쳐 일차가공된 피니언샤프트 소재(1)의 치수정밀도를 향상시키기 위해 소재를 정밀가공하는 치수교정단계를 포함하는 피니언샤프트(100) 제조방법에 있어서, 상기 치수교정단계에서 피니언샤프트 소재(1)는 푸싱장치에 의해 치수교정용 금형(5)(5')의 교정홀(11) 내부로 밀려 들어가고, 상기 교정홀(11)을 통과하면서 압착되어 설계상의 치수와 형상으로 가공됨에 그 특징이 있다.Cross-section processing step for drawing steel rod through die having perforated drawing part in the cross-sectional shape of pinion shaft 100, Length processing step for cutting drawn material 1 to a certain length, and cut material A shape processing step of drilling a fastening hole 4 into which the fixing pin 3 is inserted into one side of the (1), and chamfering the corners of the material 1, and the pinion shaft material primarily processed through the above steps ( In the pinion shaft 100 manufacturing method comprising a dimensional calibration step of precisely processing the material to improve the dimensional accuracy of 1), the pinion shaft material (1) in the dimensional calibration step is a dimensional calibration die by a pushing device (5) (5 ') is pushed into the calibration hole 11, and is compressed while passing through the calibration hole 11 is characterized in that it is processed into design dimensions and shapes.

그리고, 상기 치수교정용 금형(5)(5')은 피니언샤프트(100)의 단면형상으로 교정홀(11)이 내부에 형성되고, 상기 교정홀(11)의 표면에 피니언샤프트(100)의 단면치수에 맞춘 다수개의 교정돌조(6)가 일정간격으로 돌출되어 있다. In addition, the dimensional calibration die 5, 5 ′ has a calibration hole 11 formed therein in the cross-sectional shape of the pinion shaft 100, and the pinion shaft 100 is formed on the surface of the calibration hole 11. A plurality of straightening protrusions 6 protruding at cross-sectional dimensions protrude at regular intervals.

여기서, 상기 교정돌조(6)는 피니언샤프트 소재(1)의 소성변형이 용이하게 이루어지도록 교정홀(11)의 출구부로 갈수록 교정돌조(6) 내부 단면치수가 작아지되, 최종의 교정돌조(6) 내부 단면치수는 피니언샤프트(100)의 설계치수와 일치하거나 근사하도록 한다.In this case, the straightening protrusions 6 have a smaller cross-sectional dimension inside the straightening protrusions 6 toward the outlet of the straightening hole 11 so that plastic deformation of the pinion shaft material 1 can be easily performed. ) The internal cross sectional dimension should match or approximate the design dimension of the pinion shaft 100.

본 발명의 피니언샤프트(100)는 차량의 차동장치에서 피니언기어(2)(2')의 회전축으로 상기 피니언기어(2)(2')와 회전이 원활히 이루어지고, 피니언기어(2)(2')와 마찰되면서 파손되어 발생되는 차량의 안전사고를 방지하기 위하여 높은 정밀도의 가공이 요구된다.The pinion shaft 100 of the present invention is smoothly rotated with the pinion gear (2) (2 ') by the rotation axis of the pinion gear (2) (2') in the vehicle differential, the pinion gear (2) (2 High precision machining is required in order to prevent the safety accident of the vehicle caused by being damaged while being rubbed with ').

이를 위하여 본 발명은 상기 피니언샤프트(100)의 제조과정에서 강봉이 인발되어 절단된 후 모따기작업 및 체결공(4) 천공작업을 거쳐 일차가공된 피니언샤프트 소재(1)의 치수정밀도를 향상시키기 위한 치수교정작업이 상기 피니언샤프트 소재(1)가 치수교정용 금형(5)(5')의 교정홀(11)을 통과하여 압착되면서 이루어지도록 한 것에 특징이 있다.To this end, the present invention is to improve the dimensional accuracy of the first pinion shaft material (1) through the chamfering work and the fastening hole (4) drilling after the steel bar is drawn and cut in the manufacturing process of the pinion shaft 100 The dimensional calibration operation is characterized in that the pinion shaft material 1 is pressed while passing through the calibration hole 11 of the dimensional calibration mold (5) (5 ').

이와 대하여 종래의 치수교정작업은 주로 선반과 연마석을 사용하여 피니언샤프트 소재(1)의 표면을 연마함으로써 이루어졌는데, 이와 같은 표면연마에 의한 치수교정작업은 표면연마를 위한 보조작업으로 소재(1)를 피니언샤프트(100)의 원래길이보다 길게 절단하여 주축대 고정부를 형성시키는 작업, 표면연마작업이 끝난후 상기 주축대 고정부를 다시 절단하는 작업 등이 추가되어 제조과정이 복잡해지고 시간이 오래 걸리는 것과, 피니언샤프트 소재(1)를 선반의 주축대에 물리기 위한 여분의 고정부가 필요함에 따라 소재(1)의 낭비를 초래하는 문제가 있었다.On the other hand, the conventional dimensional calibration work is mainly performed by grinding the surface of the pinion shaft material (1) by using a lathe and abrasive stone, the dimensional calibration work by the surface polishing is a secondary work for surface polishing (1) Cutting the length of the pinion shaft 100 longer than the original length to form the spindle head fixing portion, after the surface polishing operation is finished, such as the cutting of the spindle head fixing portion is added to the complicated manufacturing process and long time There is a problem that the waste and the waste of the material 1 are required as an extra fixing part for pinching the pinion shaft material 1 to the headstock of the lathe is required.

본 발명은 치수교정용 금형(5)(5')으로 피니언샤프트 소재(1)를 통과시키는 것으로 치수교정이 이루어지게 됨에 따라 종래와 달리 제조과정이 간소화되어 피니언샤프트(100) 제작시간이 줄어들고, 소재(1)의 낭비도 방지하게 된다.According to the present invention, as the dimensional calibration is performed by passing the pinion shaft material 1 through the dimensional calibration mold 5, 5 ′, the manufacturing process is simplified and the production time of the pinion shaft 100 is reduced. Waste of the material 1 is also prevented.

또한, 상기 치수교정용 금형(5)(5')을 피니언샤프트 소재(1)가 통과하면서 소재(1)의 휘어진 부분이 펴지게 되어 소재(1)가 정확한 일직선이 되게 된다.In addition, as the pinion shaft material 1 passes through the dimensional calibration die 5, 5 ′, the bent portion of the material 1 is unfolded so that the material 1 is in a straight line.

본 발명의 피니언샤프트(100) 제조방법에서 치수교정단계를 보다 상세히 설명하면 다음과 같다.In the pinion shaft 100 manufacturing method of the present invention will be described in detail the dimensional calibration step as follows.

피니언샤프트 소재(1)는 피니언샤프트(100)의 단면치수와 형상으로 천공된 인발부를 가지는 다이(die)를 통과하면서 인발되는데, 상기와 같이 피니언샤프트(100)의 단면치수와 형상으로 된 인발부로 강봉을 인발시키더라도 소재(1)는 가공상의 오차에 의해 설계상의 피니언샤프트(100) 단면치수와 형상으로 정확하게 가공되지 못하므로 가공공차를 줄이기 위해 치수교정작업을 하게 된다.The pinion shaft material 1 is drawn while passing through a die having a withdrawal portion drilled into the cross-sectional dimension and shape of the pinion shaft 100. As described above, the pinion shaft material is drawn into the cross-sectional dimension and shape of the pinion shaft 100. Even if the steel bar is drawn, the material 1 is not precisely machined into the cross-sectional dimension and shape of the pinion shaft 100 by design due to machining errors, and thus, the dimensional calibration work is performed to reduce the machining tolerances.

본 발명은 피니언샤프트 소재(1)를 푸싱장치로 밀어 치수교정용 금형(5)(5')을 통과하도록 하면서, 상기 피니언샤프트 소재(1)가 일정치수로 압착되어 치수가 교정되게 한다.The present invention allows the pinion shaft material (1) to be pushed to a pushing device to pass through the dimensional calibration mold (5) (5 '), while the pinion shaft material (1) is compressed to a certain dimension to correct the dimensions.

상기 치수교정용 금형(5)(5')에는 피니언샤프트(100)의 단면형상과 크기로 된 교정홀(11)이 천공되어 있고, 상기 교정홀(11)에는 일정간격으로 교정돌조(6)가 환형으로 형성되어 있다.In the dimensional calibration dies 5 and 5 ', a calibration hole 11 having a cross-sectional shape and a size of the pinion shaft 100 is drilled, and the calibration hole 11 is provided at a predetermined interval in the calibration hole 11. Is formed in an annular shape.

여기서, 치수교정용 금형(5)(5')을 통과하면서 압착되는 피니언샤프트 소재(1)는 상기 치수교정용 금형(5)(5')에 의해 소성변형되지 않고 피니언샤프트 소재(1)의 내부탄성에 의해 다시 원래의 치수로 복원되는 경우가 발생되는데, 이를 방지하기 위하여 교정홀(11)가 교정돌조(6)가 일정간격으로 형성되게 된다.Here, the pinion shaft material 1 pressed while passing through the dimensional calibration dies 5 and 5 'is not plastically deformed by the dimensional calibration dies 5 and 5', The internal elasticity causes the case to be restored to its original size again. In order to prevent this, the calibration holes 11 have the calibration protrusions 6 formed at regular intervals.

이에 따라, 치수교정용 금형(5)(5')을 통과하면서 교정돌조(6)에 의해 압착된 피니언샤프트 소재(1)는 교정돌조(6)가 형성되지 않은 내부공간에서 피니언샤프트 소재(1)를 소성변형시키고 남은 압착력이 탄성력형태로 방출하도록 함으로써 피니언샤프트 소재(1)가 효과적으로 압착되어 소성변형되도록 한다.Accordingly, the pinion shaft material 1 pressed by the straightening protrusions 6 while passing through the dimensional calibration dies 5 and 5 'is the pinion shaft material 1 in the inner space in which the straightening protrusions 6 are not formed. ) So that the pinion shaft material 1 is effectively compressed and plastically deformed by causing plastic deformation and releasing the remaining pressing force in the form of elastic force.

상기 교정돌조(6)는 피니언샤프트(100)의 설계상 단면치수에 맞게 피니언샤프트 소재(1)가 압착되도록 형성시키는데, 치수교정용 금형(5)(5')의 출구부로 갈수록 미세하게 교정돌조(6) 내부 단면치수가 작아지도록 교정돌조(6)를 형성시켜 상기 피니언샤프트 소재(10)가 단계적으로 압착되도록 함으로써 소성변형이 용이하게 일어나도록 한다.The orthodontic protrusion 6 is formed so that the pinion shaft material 1 is pressed in accordance with the cross-sectional dimension of the pinion shaft 100, and the finely orthodontic protrusion becomes finer toward the outlet of the dimensional calibration die 5 and 5 '. (6) The plastic projection 6 is formed so that the internal cross-sectional dimension is reduced so that the pinion shaft material 10 is pressed in steps so that plastic deformation occurs easily.

여기서, 출구부 끝단의 최종의 교정돌조(6)의 내부 단면치수는 피니언샤프트(100)의 설계상의 치수로 하거나, 가공과정에서의 가공오차를 고려하여 설계상의 치수와 근사하도록 한다.Here, the internal cross-sectional dimension of the final calibration protrusion 6 at the end of the outlet portion may be a design dimension of the pinion shaft 100, or approximate the design dimension in consideration of machining errors in the machining process.

이에 따라, 피니언샤프트 소재(1)는 상기 치수교정용 금형(5)(5')을 통과하면서 상기 교정돌조(6)에 의해 다수번 압착되어 설계상 요구되는 단면치수로 가공됨으로써 높은 치수정밀도의 피니언샤프트(100)가 완성되게 된다.Accordingly, the pinion shaft material 1 is pressed by the calibration protrusion 6 a number of times while passing through the dimensional calibration dies 5 and 5 'and processed into a cross-sectional dimension required for design, thereby achieving high dimensional accuracy. The pinion shaft 100 is completed.

상기에서와 같이 이루어지는 치수교정단계를 포함한 피니언샤프트(100)의 제조과정을 상세히 설명하면 다음과 같다.The manufacturing process of the pinion shaft 100 including the dimensional calibration step made as described above in detail as follows.

피니언샤프트(100)는 고속으로 회전하는 피니언기어(2)(2')의 회전축이므로 높은 강도와 내마모성이 요구된다. 이에 따라 강으로 된 소재(1)를 사용하여 가공하게 된다.The pinion shaft 100 is a rotation axis of the pinion gear 2 (2 ') that rotates at high speed, so high strength and wear resistance are required. Thereby, processing is performed using the raw material 1 made of steel.

소재(1)는 먼저 피니언샤프트(100)의 단면치수와 형상으로 천공된 단면의 인발부를 가진 다이(die)를 통과하면서 인발되어 긴 환봉이 된다.The raw material 1 is first drawn out while passing through a die having a cross section of the pinion shaft 100 having a cross-section perforated in shape and shape to form a long round bar.

상기의 환봉 형상의 소재(1)는 다시 설계상의 피니언샤프트(100) 길이만큼 절단된다.The round bar-shaped material 1 is again cut by the length of the design pinion shaft 100.

여기서, 본 발명은 치수교정용 금형(5)(5')을 이용한 압착가공으로 피니언샤프트 소재(1)의 치수정밀도를 향상시키므로 종래와 달리 선반의 주축대에 물리기 위한 고정부가 필요없어 피니언샤프트(100)의 설계상 길이만큼만 절단하면 되므로 소재(1)의 낭비가 방지되게 된다.Here, the present invention improves the dimensional accuracy of the pinion shaft material 1 by crimping using the dimensional calibration mold (5) (5 '), so unlike the prior art, there is no need for a fixing part for snapping to the main shaft of the lathe pinion shaft ( The design of 100) only needs to be cut to length so that waste of the material 1 is prevented.

피니언샤프트(100)의 설계상 길이로 절단된 소재(1)는 일측 단부에 피니언샤프트(100)를 차동케이스(10)에 고정시키는 고정핀(3)이 삽입되는 체결공(4)이 천공된다.The material 1 cut to the length of the pinion shaft 100 is drilled with a fastening hole 4 into which a fixing pin 3 for fixing the pinion shaft 100 to the differential case 10 is inserted at one end thereof. .

다음으로 피니언샤프트(100)에 삽입되어 회전되는 피니언기어(2)(2')가 원활하게 회전되도록 피니언샤프트(100)의 모서리부가 모따기 가공된다.Next, the corner portion of the pinion shaft 100 is chamfered so that the pinion gear 2 and 2 ′ inserted into the pinion shaft 100 and rotated smoothly.

상기와 같이 인발된 후 체결공(4)이 형성되고 모따기가공됨으로써 피니언샤프트(100)의 형상과 치수로 일차가공된 피니언샤프트 소재(1)는 보다 높은 치수정밀도를 가지도록 치수교정용 금형(5)(5')을 통과하면서 압착가공된다.After drawing as described above, the fastening hole 4 is formed and the chamfering process is performed so that the pinion shaft material 1 primarily processed into the shape and dimensions of the pinion shaft 100 has a higher dimensional accuracy mold 5 It is pressed while passing through 5 '.

상기와 같이 치수교정된 피니언샤프트 소재(1)는 열처리되어 피니언기어(2)(2')의 고속회전에 견딜 수 있는 높은 경도와 내마모성을 가지도록 하는데, 피니언샤프트 소재(1)의 표면에 강도와 내마모성을 가진 금속을 도금하여 재질특성을 더욱 높일 수도 있다.The pinion shaft material 1 calibrated as described above is heat treated to have high hardness and wear resistance to withstand high-speed rotation of the pinion gear 2, 2 ', and the strength on the surface of the pinion shaft material 1 It is also possible to further improve the material properties by plating metal with abrasion resistance.

이와 같이 된 본 발명은 강봉이 인발되어 절단된 후 모따기작업 및 체결공(4) 천공작업을 거쳐 일차가공된 피니언샤프트 소재(1)의 치수정밀도를 향상시키기 위한 치수교정작업이 상기 피니언샤프트 소재(1)가 피니언샤프트(100)의 정확한 단면치수의 교정홀(11)이 천공된 치수교정용 금형(5)(5')을 통과하여 압착되면서 이루어지도록 함으로써, 피니언샤프트 소재(1)를 선반의 주축대에 물려 회전시키면서 소재의 표면을 연마하여 치수정밀도를 향상시키는 종래의 가공법과 달리 피니언샤프트(100)의 제조공정이 간소화되게 되어 제조시간이 감소하는 효과를 가진다.According to the present invention, the steel bar is drawn and cut, and then the dimensional calibration operation for improving the dimensional accuracy of the first pinion shaft material (1) processed through the chamfering work and the fastening hole (4) drilling work is the pinion shaft material ( 1) the pinion shaft material (1) of the shelf by making the correction hole 11 of the correct cross-sectional dimension of the pinion shaft 100 is pressed through the perforated dimensional calibration mold (5) (5 '). Unlike the conventional processing method in which the surface of the material is polished while being rotated by the main shaft to improve the dimensional accuracy, the manufacturing process of the pinion shaft 100 is simplified, thereby reducing the manufacturing time.

그리고, 종래의 가공법에서 피니언샤프트 소재(1)는 주축대 고정부를 형성시켜 선반의 주축대에 물려져 표면연마가공된 다음 다시 상기 주축대 고정부가 절단됨으로써 소재(1)가 낭비되게 되었는데, 본 발명에서는 상기와 같은 소재(1)의 낭비도 방지하게 된다.In addition, in the conventional processing method, the pinion shaft material 1 forms the spindle head fixing portion, which is bitten by the spindle head shaft of the lathe, and is subjected to surface polishing, and then the spindle head fixing portion is cut again, thereby causing the material 1 to be wasted. In the invention, the waste of the material 1 as described above is also prevented.

도 1은 본 발명의 피니언샤프트 사시도1 is a perspective view of a pinion shaft of the present invention

도 2는 인발된 금속봉을 절단하는 사시도2 is a perspective view of cutting the drawn metal rod

도 3은 절단된 금속봉을 표면가공하는 단면도3 is a cross-sectional view of processing the cut metal rod

도 4는 본 발명의 피니언샤프트가 포함된 차동장치의 조립도Figure 4 is an assembly view of the differential including the pinion shaft of the present invention

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1 : 소재 2, 2' : 피니언기어1: Material 2, 2 ': Pinion gear

3 : 고정핀 4 : 체결공3: fixing pin 4: fastening hole

5, 6' : 금형 6 : 교정돌조5, 6 ': mold 6: straightening protrusion

7 : 사이드기어 8 : 스러스트 와셔7: side gear 8: thrust washer

9 : 와셔 10 : 차동케이스9: washer 10: differential case

11 : 교정홀 100 : 피니언샤프트11: calibration hole 100: pinion shaft

Claims (3)

강봉을 피니언샤프트(100)의 단면형상으로 천공된 인발부를 가진 다이(die)로 통과시켜 인발하는 단면가공단계와, 인발된 소재(1)를 일정길이로 절단하는 길이가공단계와, 절단된 소재(1)의 일측부에 고정핀(3)이 삽입되는 체결공(4)을 천공하고, 소재(1)의 모서리부를 모따기절단하는 형상가공단계와, 상기 단계를 거쳐 일차가공된 피니언샤프트 소재(1)의 치수정밀도를 향상시키기 위해 소재를 정밀가공하는 치수교정단계를 포함하는 피니언샤프트(100) 제조방법에 있어서, 상기 치수교정단계에서 피니언샤프트 소재(1)는 푸싱장치에 의해 치수교정용 금형(5)(5')의 교정홀(11) 내부로 밀려 들어가고, 상기 교정홀(11)을 통과하면서 압착되어 설계상의 치수와 형상으로 가공되는 것을 특징으로 하는 차동장치의 피니언샤프트의 제조방법.Cross-section processing step for drawing steel rod through die having perforated drawing part in the cross-sectional shape of pinion shaft 100, Length processing step for cutting drawn material 1 to a certain length, and cut material A shape processing step of drilling a fastening hole 4 into which the fixing pin 3 is inserted into one side of the (1), and chamfering the corners of the material 1, and the pinion shaft material primarily processed through the above steps ( In the pinion shaft 100 manufacturing method comprising a dimensional calibration step of precisely processing the material to improve the dimensional accuracy of 1), the pinion shaft material (1) in the dimensional calibration step is a dimensional calibration die by a pushing device (5) A method of manufacturing a pinion shaft of a differential device, which is pushed into a calibration hole (11) in (5 ') and pressed while passing through the calibration hole (11). 피니언샤프트(100)의 단면치수와 형상의 교정홀(11)이 내부에 형성되고, 상기 교정홀(11)의 표면에 피니언샤프트(100)의 단면치수에 맞춘 다수개의 교정돌조(6)가 일정간격으로 돌출되어 있는 것을 특징으로 하는 피니언샤프트 치수교정용 금형.A straightening hole 11 having a cross-sectional dimension and a shape of the pinion shaft 100 is formed therein, and a plurality of straightening protrusions 6 adapted to the cross-sectional dimension of the pinion shaft 100 on the surface of the straightening hole 11 are fixed. Pinion shaft dimensional calibration mold, characterized in that protruding at intervals. 제 2항에 있어서, 교정돌조(6)는 피니언샤프트 소재(1)의 소성변형이 용이하게 이루어지도록 교정홀(11)의 출구부로 갈수록 교정돌조(6) 내부 단면치수가 작아지되, 최종의 교정돌조(6) 내부 단면치수는 피니언샤프트(100)의 설계치수와 일치하거나 근사하도록 한 피니언샤프트 치수교정용 금형.The cross-sectional dimension of the calibration protrusion (6) becomes smaller toward the outlet of the calibration hole (11) so that the plastic deformation of the pinion shaft material (1) is made easier. A mold for dimensional calibration of a pinion shaft whose inner cross-sectional dimension of the protrusion (6) matches or approximates the design dimension of the pinion shaft (100).
KR10-2005-0015319A 2005-02-24 2005-02-24 A manufacturing process of the pinion-shaft used differential gearing for a car and metallic pattern for size correction KR100525265B1 (en)

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PCT/KR2006/000433 WO2006090985A1 (en) 2005-02-24 2006-02-07 Method of manufacturing pinion shaft and mold thereof

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