KR20010047810A - plastic coating method of involute spline of sector shaft for EPS of car - Google Patents

plastic coating method of involute spline of sector shaft for EPS of car Download PDF

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Publication number
KR20010047810A
KR20010047810A KR1019990052189A KR19990052189A KR20010047810A KR 20010047810 A KR20010047810 A KR 20010047810A KR 1019990052189 A KR1019990052189 A KR 1019990052189A KR 19990052189 A KR19990052189 A KR 19990052189A KR 20010047810 A KR20010047810 A KR 20010047810A
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KR
South Korea
Prior art keywords
resin layer
involute spline
sector shaft
layer coating
resin
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KR1019990052189A
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Korean (ko)
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KR100369296B1 (en
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남궁주
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밍 루
주식회사 만도
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Priority to KR10-1999-0052189A priority Critical patent/KR100369296B1/en
Publication of KR20010047810A publication Critical patent/KR20010047810A/en
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Publication of KR100369296B1 publication Critical patent/KR100369296B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/026—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0442—Conversion of rotational into longitudinal movement
    • B62D5/0445—Screw drives
    • B62D5/0448—Ball nuts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/75—Shafts

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)

Abstract

PURPOSE: A resin layer of involute spline of sector shaft coating method coats an involute spline of a sector shaft with a resin layer and forms the thickness of the resin layer exactly according to previously established design, and moreover, improves an operational efficiency and reduces the time of production, largely. CONSTITUTION: At first, plural arc molding box(31) having an involute spline tooth(11) at the inside plane and connected with a cylinder(33) at the outside plane is ready and a resin layer coating device(3) is possessed so that the pitch circle of a teeth form(32) becomes one capacity. At first step, a center space(30) is made large by going the molding box(31) of the resin layer coating device(3) back. At second step, the molding box(31) is advanced by operating the cylinders(33) after positioning a sector shaft(1) at the center space(30). At third step, a Teflon resin is jetted for filling the interval(P) occurring between the involute spline tooth(11) and the tooth form(32). At forth step, the molding box(31) is gone back by operating the cylinders(33) after the Teflon resin becomes hard. Therefore, the desired thickness of uniform resin layer is completed temporarily. Thus, the thickness of a resin layer is coated according to a demand and very precise molding operation is possible. The productivity is improved because the work is simple.

Description

자동차의 전동 이피에스용 섹터 샤프트의 인벌류트 스플라인의 수지층 코팅방법 {plastic coating method of involute spline of sector shaft for EPS of car}Resin layer coating method of involute spline of sector shaft for electric EPS in automobiles {plastic coating method of involute spline of sector shaft for EPS of car}

본 발명은 자동차의 전동EPS용 섹터 샤프트의 인벌류트 스플라인의 수지층 코팅방법에 대한 것으로서, 더 상세하게는 자동차용 전동EPS에 사용되는 리서큘레이팅 볼 스크류 기어(Recirculating Ball Screw Gear)의 섹터 샤프트(Sector Shaft)부분에 인볼류트 스플라인을 성형한 후, 수지층을 효과적으로 코팅하기 위한 것이다.The present invention relates to a resin layer coating method of an involute spline of a sector shaft for an electric EPS of an automobile, and more particularly, to a sector shaft of a recirculating ball screw gear used for an electric EPS for an automobile ( After forming the involute spline on the Sector Shaft), the resin layer is effectively coated.

일반적으로 전동EPS의 섹터 샤프트(1)와 볼너트(2)는 도 1에서 보는 바와 같이 구성되어 상호 결합된다.Generally, the sector shaft 1 and the ball nut 2 of the electric EPS are constructed as shown in FIG.

즉, 섹터 샤프트(1)의 일측 끝단에 형성된 인볼류트 스플라인축부(11)와 볼너트(2)의 내주면에 형성된 인볼류트 스플라인내경부(21)를 각각 형성한후, 상호 결합하여 동력이 전달되도록 되어 있다.That is, the involute spline shaft portion 11 formed on one end of the sector shaft 1 and the involute spline inner diameter portion 21 formed on the inner circumferential surface of the ball nut 2 are respectively formed, and then coupled to each other so that power is transmitted. It is.

그러나 금속과 금속이 직접 접촉되도록 조립하면 스플라인의 가공공정에 따른 치형의 불균형, 마모로 인한 유격발생, 유격의 발생으로 인한 노이즈 발생 등의 문제점이 있기 때문에 근래에는 인볼류트 스플라인 축부(11)의 표면에 수지층을 코팅하여 사용하고 있는 실정이다.However, when the metal and the metal are in direct contact with each other, the surface of the involute spline shaft 11 may be uneven due to the imbalance of teeth due to the spline processing, the play caused by wear, and the noise caused by the play. It is a situation that a resin layer is coated on and used.

종래의 수지층 코팅방법중 하나는 나일론 수지를 약 200㎛~300㎛의 두께로 인서트 몰딩하여 실시하는 방법과, 테프론 수지를 약 25㎛~50㎛의 두께가 되도록 스프레이로 코팅하는 방법이 알려져 있다.One conventional method for coating a resin layer is a method of insert molding a nylon resin to a thickness of about 200 μm to 300 μm, and a method of coating Teflon resin with a spray so as to have a thickness of about 25 μm to 50 μm. .

전자의 방법을 통해 제작하면 나일론 수지층의 두께가 비교적 두꺼운것으로서, 두꺼운 것은 좋으나, 몰딩시 치수 정밀도가 나쁘고, 치형의 불균형을 초래할 수 있어 정밀함이 특징인 인볼류트 스플라인의 사용목적과 부합되지 않으며, 후자의 방법을 통해 제작하면 역시 균일한 치형을 이루기에 불리하고, 강도가 좋지 않을 뿐만 아니라 비교적 얇기 때문에 노이즈가 발생한다.If manufactured by the former method, the thickness of the nylon resin layer is relatively thick, and the thickness is good, but the dimensional accuracy during molding is poor, and it may cause imbalance of teeth, which does not correspond to the purpose of using the involute spline, which is characterized by precision. The latter method is also disadvantageous to achieve a uniform tooth, and not only does not have a good strength, but also generates a relatively thin noise.

따라서 본 발명은 상기와 같은 종래의 문제점을 감안하여 이를 해결 보완하고자 안출한 것으로서, 발명의 주된 목적은 인볼류트 스플라인에 수지층을 코팅하되, 수지층의 두께를 미리 설계한 바에 따라 정확하게 형성할 수 있도록 할 뿐만 아니라 정확한 치형을 이룰 수 있도록 하는데 있으며, 또 다른 한편으로는 작업성이 향상되고, 제작 시간을 크게 단축할 수 있도록 하고자 하는데 있는 것이다.Therefore, the present invention has been made in view of the conventional problems as described above to solve the problem, the main object of the invention is to coat the resin layer on the involute spline, it can be accurately formed according to the thickness of the resin layer in advance In addition to making it possible to achieve accurate teeth, on the other hand, to improve workability and to significantly shorten the production time.

이를 위한 특징적인 실시 방법은 외주면에는 실린더가 연결되고, 내측면에 인볼류트 스플라인 치형을 갖는 호형 성형틀들을 복수개 준비하되, 상기의 호형 성형틀들을 방사상으로 배열하여 치형들의 피치원이 하나의 정원이 되도록 수지층 코팅장치를 구비한 후, 상기한 수지층 코팅장치의 성형틀들을 후퇴시켜 중앙공간을 넓게하는 제1과정과, 상기의 제1과정을 통해서 넓혀진 중앙공간에 섹터 샤프트를 위치 시킨 후, 실린더들을 작동시켜 성형틀들을 전진시키는 제2과정과, 상기한 제2과정을 통해서 인볼류트 스플라인 축부와 성형틀들의 치형 사이에 발생한 간격에 테프론 수지를 분사하는 제3과정과, 상기한 제3과정을 통해서 분사된 테프론 수지가 굳은 후, 실린더들을 작동시켜 성형틀들을 후퇴시키는 제4과정을 차례로 거쳐 원하는 두께의 균일 수지층이 일시에 완성될 수 있도록 하는데 있다.A characteristic implementation method for this purpose is to prepare a plurality of arc forming molds having a cylinder connected to the outer circumferential surface and having an involute spline tooth on the inner surface, and arranging the arc forming molds radially so that the pitch circle of the teeth is one garden. After the resin layer coating apparatus is provided, the first process of retracting the molds of the resin layer coating apparatus to widen the central space, and the sector shaft in the central space widened through the first process, A second process of advancing the molds by operating the cylinders; a third process of injecting teflon resin at a gap generated between the involute spline shaft and the teeth of the molds through the second process; and the third process. After the Teflon resin sprayed through hardens, the cylinders are operated to retreat the molds in order to retreat the molds. It is to allow the resin to be completed all at once.

도 1은 섹터 샤프트와 볼너트의 구성을 보인 예시도1 is an exemplary view showing a configuration of a sector shaft and a ball nut

도 2는 본 발명의 실시를 위한 수지층 코팅장치의 작동전 평면도Figure 2 is a plan view before operation of the resin layer coating apparatus for the practice of the present invention

도 3은 본 발명의 수지층 코팅장치의 작동후 상태를 보인 평면도Figure 3 is a plan view showing a state after the operation of the resin layer coating apparatus of the present invention

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

1 : 섹터 샤프트 2 : 볼너트1: sector shaft 2: ball nut

3 : 수지층 코팅장치 11 : 스플라인 축부3: resin layer coating apparatus 11: spline shaft

31 : 성형틀 32 : 치형31: mold 32: teeth

33 : 실린더33: cylinder

이하 본 발명의 실시예에 따른 구성 및 작용을 첨부 도면에 따라 상세히 설명한다.Hereinafter, the configuration and operation according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

본 발명에 따른 수지층 코팅방법은 코팅장치가 필요하다.The resin layer coating method according to the present invention requires a coating apparatus.

즉, 도 2에서 보는 바와 같이 수지층 코팅장치(3)는 외주면에는 실린더(33)가 연결되고, 내측면에는 인볼류트 스플라인 축부(11)를 갖는 호형 성형틀(31)을 3∼8개 정도로 복수개를 준비한 후, 이들을 방사상으로 배열하여 상기한 치형들의 피치원이 원이 될 수 있도록 한다.That is, as shown in FIG. 2, the resin layer coating apparatus 3 has a cylinder 33 connected to an outer circumferential surface thereof and three to eight arc shaped molds 31 having an involute spline shaft portion 11 on an inner surface thereof. After preparing a plurality, they are arranged radially so that the pitch circle of the teeth can be a circle.

그리고 이들 호형 성형틀(31)들은 모두 각각의 실린더(33)들에 의해 중앙으로 혹은 그 반대방향으로 전진/후퇴할 수 있도록 되어 있다.And these arc-shaped molds 31 are all able to advance / retract in the center or the opposite direction by the respective cylinders 33. As shown in FIG.

또한 성형틀(31)들이 모두 중앙을 향해 전진하였을 때, 피치원이 정원이 됨은 물론 이때는 섹터 샤프트(1)의 스플라인 축부(11)와 간격(P)이 약 200㎛~300㎛의 치수가 되도록 미리 설계되어 있다.In addition, when the molds 31 are all advanced toward the center, the pitch circle becomes a garden and at this time, the spline shaft portion 11 and the spacing P of the sector shaft 1 are about 200 μm to 300 μm. It is designed in advance.

상기와 같이 준비된 수지층 코팅장치(3)를 사용하여 제1과정 내지 제4과정을 통해 코팅하되, 제1과정에서는 성형틀(31)들을 후퇴시켜 중앙공간(30)을 넓게하고, 제2과정에서는 상기의 제1과정을 통해서 넓혀진 중앙공간(30)에 섹터 샤프트(1)의 스플라인 축부(11)를 위치 시킨 후, 실린더(33)들을 작동시켜 성형틀(31)들을 전진시키고, 제3과정에서는 상기한 제2과정을 통해서 인볼류트 스플라인 축부(11)와 성형틀(31)들의 치형(32) 사이에 발생한 간격(P)에 테프론 수지를 분사하여 채우도록 하며, 제4과정에서는 상기한 제3과정을 통해서 분사된 테프론 수지가 굳은 후, 실린더(33)들을 다시 후퇴 작동시키는 것이다.Coating through the first to fourth process using the resin layer coating apparatus 3 prepared as described above, in the first process to retract the mold 31 to widen the central space 30, the second process In the first process, after placing the spline shaft portion 11 of the sector shaft (1) in the central space (30) widened through the first process, by moving the cylinder 33 to advance the mold 31, the third process In the second process is to fill the spacing (P) generated between the involute spline shaft portion 11 and the teeth 32 of the mold 31 by filling the Teflon resin, and in the fourth process After the Teflon resin injected through the three processes harden, the cylinders 33 are retracted again.

이때, 제2과정과 제3과정의 사이에서 치형(32)의 표면에 이형물질을 도포하여 분리가 용이하도록 하는 것이 좋다.At this time, it is preferable to apply a release material to the surface of the teeth 32 between the second process and the third process to facilitate separation.

이와 같은 일련의 공정을 통해 보다 간편하면서도 신속하고, 또 정확한 치수의 코팅층을 일시에 성형할 수 있게 되는 것이다.Through such a series of processes it is possible to form a coating layer of a simpler, faster and more accurate dimensions at a time.

위에서 상세히 설명한 바와 같은 본 발명은 인볼류트 스플라인 축부(11)에 수지층을 코팅하되, 섹터 샤프트(1)의 스플라인 축부(11)와 임의의 치수 만큼 간격(P)을 두고 감쌀 수 있는 수지층 코팅장치(3)를 마련한 후, 상기 간격(P) 속에 테프론 수지를 스프레이로 분사하여 채우므로써 완전히 성형하도록 하였기 때문에 수지층의 두께를 원하는대로 코팅할 수 있을 뿐만 아니라 매우 정밀하게 성형가능하고, 작업이 간단하기 때문에 생산성이 향상되는 등 여러 가지 장점을 가지는 것이다.The present invention as described in detail above is coated with a resin layer on the involute spline shaft portion 11, the resin layer coating that can be wrapped at a distance (P) to the spline shaft portion 11 of the sector shaft (1) by an arbitrary dimension After the device 3 was prepared, it was completely molded by spraying and filling the Teflon resin into the gap P so that the thickness of the resin layer could be coated as desired, and the moldability could be formed very precisely. Because of its simplicity, it has several advantages, such as increased productivity.

Claims (2)

외주면에는 실린더(33)가 연결되고, 내측면에 인볼류트 스플라인 축부(11)를 갖는 호형 성형틀(31)들을 복수개 준비하되, 상기의 호형 성형틀(31)들을 방사상으로 배열하여 치형(32)들의 피치원이 하나의 정원이 되도록 수지층 코팅장치(3)를 구비한 후,A cylinder 33 is connected to the outer circumference thereof, and a plurality of arc molding dies 31 having an involute spline shaft portion 11 are prepared on the inner side thereof, and the arc molding dies 31 are arranged radially to form a tooth 32. After the resin layer coating device 3 is provided so that the pitch circle of the field is one garden, 상기한 수지층 코팅장치(3)의 성형틀(31)들을 후퇴시켜 중앙공간(30)을 넓게하는 제1과정과,A first process of retracting the forming molds 31 of the resin layer coating apparatus 3 to widen the central space 30; 상기의 제1과정을 통해서 넓혀진 중앙공간(30)에 섹터 샤프트(1)를 위치 시킨 후, 실린더(33)들을 작동시켜 성형틀(31)들을 전진시키는 제2과정과,After placing the sector shaft (1) in the central space (30) widened through the first process, the second process of advancing the mold 31 by operating the cylinders 33, 상기한 제2과정을 통해서 인볼류트 스플라인 축부(11)와 성형틀(31)들의 치형(32) 사이에 발생한 간격(P)을 모두 채우도록 테프론 수지를 분사하는 제3과정과,A third process of injecting Teflon resin so as to fill all the gaps P generated between the involute spline shaft part 11 and the teeth 32 of the mold 31 through the second process; 상기한 제3과정을 통해서 분사된 테프론 수지가 굳은 후, 실린더(33)들을 작동시켜 성형틀(31)들을 후퇴시키는 제4과정을 차례로 거쳐 원하는 두께의 균일 수지층이 일시에 완성될 수 있도록 함을 특징으로 하는 자동차의 전동EPS용 섹터 샤프트의 인벌류트 스플라인의 수지층 코팅방법.After the Teflon resin injected through the third process is hardened, the cylinder 33 is operated to perform the fourth process of retreating the mold 31 so that a uniform resin layer having a desired thickness can be completed at one time. A resin layer coating method of an involute spline of a sector shaft for an electric EPS of an automobile. 제 1 항에 있어서,The method of claim 1, 상기한 수지층 코팅장치(3)의 호형 성형틀(31)은 실린더(33)에 의해 방사상으로 왕복할 수 있도록 하되, 약 3∼8개가 모여 하나의 원을 이루도록 구성한 것을 특징으로 하는 자동차의 전동EPS용 섹터 샤프트의 인벌류트 스플라인의 수지층 코팅방법.The arc-shaped molding die 31 of the resin layer coating apparatus 3 is capable of reciprocating radially by the cylinder 33, but about 3 to 8 are assembled to form a circle. Resin layer coating method of involute spline of sector shaft for EPS.
KR10-1999-0052189A 1999-11-23 1999-11-23 plastic coating method of involute spline of sector shaft for EPS of car KR100369296B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100559680B1 (en) * 2003-08-21 2006-03-10 기아자동차주식회사 Method of srteering intermediated shaft

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JP3098105B2 (en) * 1992-05-29 2000-10-16 株式会社山田製作所 Spline shaft and molding method thereof
JPH08135647A (en) * 1994-11-15 1996-05-31 Matsui Seisakusho:Kk Forming method of phase indexing checking part of spline shaft
JP3520620B2 (en) * 1995-09-27 2004-04-19 日本精工株式会社 Method of forming a ball spline groove on an outer peripheral surface of an input shaft of a toroidal type continuously variable transmission

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100559680B1 (en) * 2003-08-21 2006-03-10 기아자동차주식회사 Method of srteering intermediated shaft

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