KR970073813A

KR970073813A - Manufacturing method of main bearing for automobile engine

Info

Publication number: KR970073813A
Application number: KR1019960016337A
Authority: KR
Inventors: 이창승
Original assignee: 김영귀; 기아자동차 주식회사
Priority date: 1996-05-16
Filing date: 1996-05-16
Publication date: 1997-12-10

Abstract

본 발명은 자동차엔진용 메인베어링의 제조방법에 관한 것으로, 제 1모형(1)으로 메인베어링(10)의 형상과 동일하게 가공하는 단계, 제 1주형상자(2)속에 제 1모형(1)을 삽입한 후 1차 사형주조시키는 단계, 제 1모형(1)을 제 1주형 상자(2)에서 빼내어 공동부(4)를 형성시키는 단계, 상형(5)을 제 1주형상자(2)의 상부에 설치한 후 주입구(5a)로 주철재의 쇳물을 주입하여 공동부(4)를 충진시키는 단계, 제 1주형상자(2)와 상형(5)을 분리시켜 미완성 메인베어링(6)을 생산하는 단계, 미완성 메인베어링(6)의 외경표면부에 니켈의 코팅부(11)를 형성시킨 다음 가공된 제 2모형(7)과 접합시켜 제 2주형상자(8)속으로 삽입시킴과 더불어 2차사형주조시키는 단계, 제 2모형(7)을 제 2주형상자(8)에서 빼내어 공동부(9)를 형성시키는 단계, 상형(5)을 제 2주형상자(8)의 상부에 설치한 후 주입구(5a)로 알루미늄 용탕을 주입하여 공동부(9)를 충진시키는 단계, 주입된 제 2주형상자(8)와 상형(5)을 분리시켜 주철과 알루미늄이 접합된 메인 베어링(10)을 생산하는 단계로 이루어져 주철과 알루미늄과의 접합부위가 코팅부(11)에 의해 접착력이 크게 향상됨과 더불어 접합부위의 강도도 크게 향상되어 메인베어링(10)의 전체적인 강성을 크게 증진시킬 수 있도록 된 것이다.The present invention relates to a method of manufacturing a main bearing for an automobile engine and includes the steps of machining the same as the shape of the main bearing 10 with the first mold 1 and the step of forming the first mold 1 in the first mold box 2, (1) is taken out of the first mold box (2) to form the cavity (4), and the upper mold (5) is inserted into the first mold box Filling the cavities 4 by injecting molten metal of main steel into the injection port 5a after the upper mold 5 is installed on the upper mold 5 and separating the upper mold 5 from the first mold box 2 to produce the incomplete main bearing 6 The coated portion 11 of nickel is formed on the outer surface portion of the unfinished main bearing 6 and is then inserted into the second mold box 8 while being joined with the processed second mold 7, Casting the second mold 7 from the second mold box 8 to form a cavity 9; placing the top mold 5 on top of the second mold box 8; A step of injecting molten aluminum into the rear injection port 5a to fill the cavity 9 and a step of separating the injected second mold box 8 from the upper mold 5 to form a main bearing 10, The bonding strength between the cast iron and aluminum is greatly improved by the coating portion 11 and the strength of the joint portion is greatly improved and the overall rigidity of the main bearing 10 is greatly improved .

Description

Manufacturing method of main bearing for automobile engine

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제 1도는 엔진에 사용되는 크랭크축과 메인베어링의 사시도, 제 2도는 본 발명에 따라 표면 부에 니켈을 코팅처리한 미완성 메인베어링의 개략도, 제 3도는 본 발명에 따른 메인베어링의 경계층을 도시한 요부확대도, 제 4도와 제 5도는 종래 기술로서, 메인베어링의 제조단계를 도시한 개략도이다.FIG. 1 is a perspective view of a crankshaft and a main bearing used in an engine, FIG. 2 is a schematic view of an unfinished main bearing in which nickel is coated on a surface portion according to the present invention, FIG. 4 and 5 are schematic diagrams showing a manufacturing step of a main bearing as a prior art.

Claims

The first mold 1 is inserted into the first mold box 2 having the sand 2a as a molding sand, and then the first mold 1 is inserted into the first mold box 1, A step of casting the first mold 1 from the first mold box 2 to form the cavity portion 4 after the first casting mold casting, The upper mold 5 on which the sprue 5b is formed is installed on the upper part of the first mold box 2 and then the cast iron of the main iron is injected into the injection port 5a to fill the cavity 4, A step of separating the first mold box 2 and the upper mold 5 after solidification of the second mold 7 to produce an incomplete main bearing 6 of the main steel and a step of machining the second mold 7 to join the incomplete main bearing 6 The second mold 7 is pulled out of the second mold box 8 and the peripheral portion of the circumference of the unfinished main bearing 6 is pulled out of the second mold box 8, The upper mold 5 having the injection port 5a and the sprue 5b is installed on the upper part of the second mold box 8 and then the molten aluminum is injected into the injection port 5a, And then the second mold box 8 and the upper mold 5 are separated from each other after the molten aluminum melt is solidified to produce a main bearing 10 in which cast iron and aluminum are bonded to each other A method of manufacturing a main bearing for an automobile engine, the method comprising the steps of: forming a coating portion (11) of nickel on the outer surface of the unfinished main bearing (6) to improve bonding strength between cast iron and aluminum, Wherein the step of forming the main bearing comprises the steps of:

※ Note: It is disclosed by the contents of the first application.