KR20000037488A - method of manufacturing a roll-forming pulley for water-pump - Google Patents
method of manufacturing a roll-forming pulley for water-pump Download PDFInfo
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- KR20000037488A KR20000037488A KR1020000022687A KR20000022687A KR20000037488A KR 20000037488 A KR20000037488 A KR 20000037488A KR 1020000022687 A KR1020000022687 A KR 1020000022687A KR 20000022687 A KR20000022687 A KR 20000022687A KR 20000037488 A KR20000037488 A KR 20000037488A
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- pulley
- diameter
- boss
- boss portion
- thickness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/027—Trimming
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/12—Forming profiles on internal or external surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/36—Pulleys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pulleys (AREA)
Abstract
Description
본 발명은 워터펌프용 풀리의 제작방법에 관한 것으로, 더욱 상세하게는 소결주조로 제작되는 풀리가 전조작업으로 제작됨에 따라, 제조공정이 수월해지고 이렇게 제작된 풀리의 제조원가를 낮출 수 있음은 물론 기계적 성질이 월등히 향상되도록 된 워터펌프용 풀리의 제작방법에 관한 것이다.The present invention relates to a method of manufacturing a water pump pulley, and more particularly, as the pulley manufactured by sinter casting is manufactured by a rolling operation, the manufacturing process is facilitated and the manufacturing cost of the manufactured pulley can be lowered as well as mechanical. The present invention relates to a method of manufacturing a water pump pulley, the properties of which are significantly improved.
일반적으로, 워터펌프용 풀리는 워터펌프에 장착되는 부품인데, 그 형상은 도 1에 도시된 것과 같이 중심부가 관통된 컵형상이다.In general, the pulley for the water pump is a component mounted on the water pump, the shape of which is a cup-shaped penetrated through the center as shown in FIG.
상기의 풀리는 중심부에 관통된 보스부의 형상이 복잡하여 주물공정의 형태인 소결주조로 생산되어 왔다.The pulley has been produced by sinter casting, which is a form of a casting process due to the complicated shape of the boss portion penetrated at the center.
따라서, 주물공정의 특성상 제조단가가 고가이면서도 작업환경이 열악한 단점이 있으면서도, 이 주물공정에 의해 생산된 풀리는 기계적 성질이 약한 결점이 있었다.Therefore, while the manufacturing cost is expensive due to the characteristics of the casting process and the working environment is poor, the pulley produced by this casting process has a weak mechanical property.
이에 본 발명은 상기와 같은 제반 문제점을 해소하기 위해 발명된 것으로, 종래에 소결주조로 제작하던 것을 전조작업으로 생산함에 따라, 풀리의 품질이 향상됨은 물론 제조단가를 낮출 수 있도록 된 워터펌프용 풀리의 제작방법을 제공함에 그 목적이 있다.Accordingly, the present invention was invented to solve the above problems, and according to the production of the prior work produced by sinter casting, the quality of the pulley is improved as well as the manufacturing cost of the water pump pulley can be lowered The purpose is to provide a method of making.
도 1은 본 발명에 따른, 워터펌프용 풀리의 단면도 및 평면도,1 is a cross-sectional view and a plan view of a pulley for a water pump, according to the present invention;
도 2a ∼ 도 2h는 본 발명에 따른, 워터펌프용 풀리의 제작공정도,2a to 2h is a manufacturing process of the pulley for water pump according to the present invention,
도 3은 본 발명의 포밍공정에 적용되는 롤포밍머신의 사시도,3 is a perspective view of a roll forming machine applied to the forming process of the present invention,
도 4는 본 발명에 따른, 포밍공정을 설명하는 부분확대도이다.4 is a partially enlarged view illustrating a forming process according to the present invention.
*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
P --- 풀리, A --- 풀리의 높이,P --- pulley, A --- height of pulley,
B --- 벨트걸림부, a,a' --- 보스의 직경,B --- belt catch, a, a '--- diameter of boss,
b,b' --- 보스의 높이, c,c' --- 보스의 두께,b, b '--- height of boss, c, c' --- thickness of boss,
D --- 강판 소재의 두께, d,d' --- 풀리의 벨트걸림부 높이,D --- thickness of steel plate material, d, d '--- belt fastening height of pulley,
E --- 풀리의 내경, e,e' --- 보스의 높이(천공 후)E --- inner diameter of pulley, e, e '--- height of boss (after drilling)
상기와 같은 목적을 달성하기 위한 본 발명은 일정한 두께(D)를 가진 강판을 절단하여 일정한 크기로 판금작업을 하는 블랭킹(Blanking)공정과, 상기 블랭킹된 편평한 판금원판을 상온에서 중심부형상이 지름(a)과 깊이(b)인 보스부가 되도록 압출하는 1차드로잉(Drawing)공정과, 상기 보스부가 지름(a')과 깊이(b')가 되도록 한번더 압출하는 2차드로잉공정과, 원판인 강판이 높이(A)를 갖도록 드로잉되는 3차드로잉공정과, 상기 보스부의 지름(a')을 펀칭으로 구멍을 천공하는 피어싱(Piercing)공정과, 상기 펀칭된 보스부의 지름(a')의 내주면을 다듬질하고 보스부 두께(c)를 육성하는 포깅공정(Forging)과, 상기 지름(a')을 끼우고 회전하는 다이형(26)과 맞물려 보스의 외주면을 밀착시키는 상부,하부맨드럴(Mandrel; 23,25)과 제1,제2성형롤러(22,24)가 갖추어진 롤포밍머신(Roll Forming Machine; 20)에 의한 포밍공정과, 이렇게 가공된 재료를 다듬질하는 선삭공정(Trimming)과, 외주면에 착색내지는 전착시키는 표면처리공정으로 구성되는 것을 특징으로 하고 있다.The present invention for achieving the above object is a blanking (Blanking) process for cutting the steel sheet having a certain thickness (D) to a certain size and the sheeting work, and the blanked flat sheet metal disk at room temperature in the central shape diameter ( a) a first drawing step of extruding the boss to a) and a depth b; a second drawing process of extruding the boss once again to have a diameter a 'and a depth b'; A third drawing process in which the steel sheet is drawn to have a height A, a piercing process of punching a hole by punching the diameter a 'of the boss portion, and an inner circumferential surface of the diameter a' of the punched boss portion The top and bottom mandrel (Mandrel) to close the outer circumferential surface of the boss by meshing with the fogging process (Forging) and the die (26) rotated by inserting the diameter (a ') and trimming the boss portion (c). Roll forming machine equipped with 23 and 25 and first and second forming rollers (22 and 24) Forming Machine (20), forming process, trimming process for finishing the material thus processed, and the surface treatment process for coloring or electrodeposition on the outer peripheral surface.
이하, 본 발명을 첨부한 도면을 참조하여 상세하게 설명하기로 한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.
도 1은 본 발명에 따른, 워터펌프용 풀리의 단면도 및 평면도이고, 도 2는 본 발명에 따른, 워터펌프용 풀리의 제작공정도이다.1 is a cross-sectional view and a plan view of a water pump pulley according to the present invention, Figure 2 is a manufacturing process of the water pump pulley according to the present invention.
도시된 바와 같이, 본 발명이 적용되는 바람직한 제1실시예의 공정순서는, 일정한 두께(D)를 가진 한장의 강판(도2a)을 절단하여 일정한 크기로 판금작업을 하는 블랭킹(Blanking)공정(도 2b)과, 상기 블랭킹된 편평한 판금원판을 상온에서 중심부형상이 지름(a)과 깊이(b)인 보스부가 되도록 압출하는 1차드로잉(Drawing)공정(도2c)과, 상기 보스부가 지름(a')과 깊이(b')가 되도록 한번더 압출하는 2차드로잉공정(도2d)과, 원판인 강판이 높이(A)를 갖도록 드로잉되는 3차드로잉공정(도2e)과, 상기 보스부의 지름(a')을 펀칭으로 구멍을 천공하는 피어싱(Piercing)공정(도2f,도2g)과, 상기 펀칭된 보스부의 지름(a')의 내주면을 다듬질하고 보스부 두께(c)를 육성하는 포깅(Forging)공정(도2h)과, 상기 지름(a')을 끼우고 회전하는 다이형(26)과 맞물려 보스의 외주면을 밀착시키는 상부,하부맨드럴(Mandrel; 23,25)과 제1,제2성형롤러(22,24)가 갖추어진 롤포밍머신(Roll Forming Machine; 20)에 의한 포밍공정(도2h)과, 이렇게 가공된 재료를 다듬질하는 선삭공정(Trimming)과, 외주면에 착색내지는 전착시키는 표면처리공정으로 구성된다.As shown in the drawing, the process sequence of the first preferred embodiment to which the present invention is applied is a blanking process of cutting a sheet of steel sheet having a constant thickness D (FIG. 2b) and a primary drawing process (FIG. 2C) for extruding the blanked flat sheet metal disc to form a boss portion having a diameter (a) and a depth (b) at room temperature, and the boss portion having a diameter (a). Secondary drawing process (FIG. 2D), which is extruded once more to become ') and depth (B'), tertiary drawing process (FIG. 2E) in which the steel sheet as a disc is drawn to have a height (A), and the diameter of the boss portion. A piercing process (Fig. 2f, Fig. 2g) for punching a hole by punching (a ') and a fogging to trim the inner circumferential surface of the diameter (a') of the punched boss and to raise the boss thickness (c). (Forging) Step (Fig. 2h), and the image that is in close contact with the outer circumferential surface of the boss in engagement with the die die 26 that rotates by inserting the diameter (a ') Forming process (Fig. 2h) by the roll forming machine (20) equipped with the lower and lower mandrel (Mandrel 23, 25) and the first and second forming rollers (22, 24) It consists of a turning process for finishing the finished material and a surface treatment process for coloring or electrodeposition on the outer circumferential surface.
이하, 본 발명의 바람직한 제1실시예의 작용에 대해 설명한다.Hereinafter, the operation of the first preferred embodiment of the present invention will be described.
본 발명의 블랭킹공정에서는 일정한 두께(D)를 가진 강판을 소정의 크기로 판금작업을 하게 되는데, 보스부가 차지하는 표면적은 물론 보스부의 높이까지 고려한 넓이로 제작되어야 한다.In the blanking process of the present invention, the steel sheet having a predetermined thickness (D) is a sheet metal work to a predetermined size, it should be made in the width considering the height of the boss as well as the surface area occupied by the boss.
이어 1차드로잉공정에서는, 상기 블랭킹된 편평한 판금원판을 상온에서 전면이 컵모양으로 압출하는데, 이 공정에서 보스부의 기본형상이 결정되며 보스부의 높이(b)가 평행한 원통으로 가공되는 것이 바람직하다.Subsequently, in the primary drawing process, the blanked flat sheet metal disc is extruded in the shape of a cup at a front surface at room temperature. In this process, the basic shape of the boss is determined, and it is preferable that the height b of the boss is processed into a parallel cylinder. .
그 다음 2차드로잉공정에서는, 1차드로잉공정에서 형성된 보스부의 지름(a)과 높이(b)가 각각 a 〉 a' , b 〈 b'로 되도록 한번더 드로잉되어 원하는 형상의 보스부로 가공된다. 한편 소재의 두께와 요구되는 보스의 두께에 따라 2차드로잉공정의 차수를 증감할 수도 있다.Next, in the secondary drawing process, the diameter (a) and the height (b) of the boss portion formed in the primary drawing process are drawn once more so that a> a 'and b <b', respectively, and are processed into a boss portion of a desired shape. The order of the secondary drawing process may be increased or decreased depending on the thickness of the material and the thickness of the required boss.
3차드로잉공정에서는, 원판으로 된 강판이 풀리(P)의 높이(A)를 갖도록 드로잉가공된다.In the tertiary drawing step, the steel sheet made of a disc is drawn to have the height A of the pulley P. FIG.
이어 피어싱공정에서는, 상기 보스부의 중심부에 펀칭으로 구멍을 천공하고, 포깅공정에서는 거친 내곡면의 선단부분을 다듬고 보스부 두께(c)가 c 〈 c'가 되도록 육성한다. 이때 천공후의 보스 높이(e)는 e(도f) 〉 e'(도g)가 된다.Subsequently, in the piercing step, holes are punched in the center of the boss portion, and in the fogging step, the tip portion of the rough inner curved surface is trimmed and the boss portion thickness c is raised to be c <c '. At this time, the boss height e after drilling is e (Fig. F) > e '(Fig. G).
롤포밍공정에서는 롤포밍머신을 설명하는 부분확대도인 도 3,4를 참조하여 설명한다. 포깅공정까지 완료된 상태에서 가공이 끝난 재료를 다이형(26)에 물리고 나머지부분을 가공하는 단계로서, 도 4에 도시된 것과 같이 벨트걸림부(B)를 성형하는 것인데, 유압실린더(28,29)에 의해 작동하는 제1,제2성형롤러(22,24) 그리고 상부,하부맨드럴(23,25)을 갖춘 롤포밍머신(20)이 사용된다. 여기서 상기 1차 성형롤러(22)의 형상은 적은 힘으로 풀리 두께(d)가 수월하게 풀리 외주면이 확장(spreading ＆ encarging)되면서 얇야진 두께(d')로 감량조절이 가능하게 하기 위해, 원주면에는 원형의 나사산이 형성되어 있고, 회전하는 풀리의 외주면에 밀착되어 풀리의 외주면이 밀려들어가 1차적으로 풀리의 두께(d)가 d 〉 d'로 되며, 2차 성형롤러(24)가 1차 성형된 외주면에 밀려들어가 원하는 최종 형상과 두께를 얻을 수 있게 된다. 이때, 풀리의 높이는 A 〈 A'로 되며, 풀리의 소재 두께(d)보다 보스부의 두께(c')가 두껍도록 제작(d 〈 Dc'가 됨)되는데 이는 보스부의 내경에 워터펌프의 축이 억지끼움으로 끼워지는 보스부에 기계적 강성을 높여주기 위함이다.The roll forming process will be described with reference to Figs. 3 and 4, which are partially enlarged views illustrating the roll forming machine. In the step of finishing the fogging process, the finished material is clamped to the die type 26 and the remaining parts are processed. As shown in FIG. 4, the belt catching part B is molded, and the hydraulic cylinders 28 and 29 A roll forming machine 20 having first and second forming rollers 22 and 24 and upper and lower mandrels 23 and 25 actuated by the < RTI ID = 0.0 > Here, the shape of the primary forming roller 22 has a pulley thickness d with a small force, so that the pulley outer circumferential surface can be easily reduced to a thinner thickness d 'while spreading and encarging. A circular thread is formed in the main surface, and the outer peripheral surface of the pulley is pushed in close contact with the outer peripheral surface of the rotating pulley, and the thickness (d) of the pulley is primarily d> d ', and the secondary forming roller 24 is 1 It is pushed to the outer molded outer circumferential surface to obtain the desired final shape and thickness. At this time, the height of the pulley is A <A ', the thickness of the boss portion (c') is thicker than the material thickness (d) of the pulley (d <D c ') to increase the mechanical stiffness of the boss where the shaft of the water pump fits inside the boss.
상기 다이형(26)은 롤포밍머신(20)의 하부맨드럴(25)에 설치된 모터에 의해 회전하게 되고, 상기 상부맨드럴(23)은 회전하는 재료를 밀착고정하는 센터역할을 하며 상부의 유압실린더(21)의 로드와 회전자제 되도록 조인트된다.The die 26 is rotated by a motor installed in the lower mandrel 25 of the roll forming machine 20, and the upper mandrel 23 serves as a center for tightly fixing the rotating material. Joint with the rod of the hydraulic cylinder (21) so as to control the rotor.
그런데, 여기서 상부맨드럴(23)의 직경은 성형하고자 하는 보스부의 지름(a')의 외경과 풀리 내경(E)에 따라 결정되며, 상부맨드럴(23)이 보스부를 밀착고정시킬 수 있도록 되는데, 가공이 완료되면 상부맨드럴이 용이하게 제거되어야 한다.By the way, the diameter of the upper mandrel 23 is determined according to the outer diameter and the pulley inner diameter (E) of the diameter (a ') of the boss to be molded, the upper mandrel (23) is to be able to securely close the boss. Once the machining is complete, the upper mandrel should be easily removed.
여기까지 가공되어 완전한 형상으로 가공된 풀리는 풀리가 사용되는 환경내지는 조건에 맞도록 풀리의 전면에 착색내지는 전착도장시키는 표면처리공정을 통하여 완제품으로 가공된다.The pulley processed up to this point and processed to a perfect shape is processed into a finished product through a surface treatment process in which the front surface of the pulley is colored or electrodeposition-coated to meet the conditions of the environment in which the pulley is used.
한편, 본 발명이 적용되는 바람직한 제2실시예의 공정순서는, 냉간단조 소재를 사용하여 한번 내지 두번의 프레스가공으로 반제품으로 가공한 다음(포깅공정까지 완료됨), 상기 반제품의 풀리를 끼우고 회전하는 다이형(26)과 맞물려 보스부의 외경과 풀리 내경(E)을 밀착시키는 상부,하부맨드럴(Mandrel; 23,25)과 제1 실시예와 같은 1차,2차 성형롤러(22,24)가 갖추어진 롤포밍머신(Roll Forming Machine; 20)에 의한 포밍공정과, 이렇게 가공된 재료를 다듬질하는 선삭공정(Trimming)과, 풀리의 표면을 착색내지는 전착도장시키는 표면처리공정으로 구성된다.On the other hand, the process sequence of the second embodiment to which the present invention is applied is processed into a semi-finished product by pressing once or twice using cold forging material (completed up to the fogging process), and then inserting and rotating the pulley of the semi-finished product. Upper and lower mandrel (Mandrel) 23 and 25, which mesh with the die type 26 to closely contact the outer diameter of the boss and the inner diameter E of the pulley, and the primary and secondary forming rollers 22 and 24 as in the first embodiment. ), A forming process by a roll forming machine (20), a turning process for trimming the processed material, and a surface treatment process for electrodeposition coating to color the surface of the pulley.
본 발명의 제2실시예의 공정순서 및 작용은 제1실시예의 후반부 가공과 동일하므로 별도의 설명은 생략한다.Since the process sequence and operation of the second embodiment of the present invention are the same as the second half processing of the first embodiment, a separate description is omitted.
제2실시예에서 사용되는 소재는 냉간단조소재이기 때문에 상기 제1실시예에서 사용되는 강판보다는 공정차수가 대폭 단축된다. 따라서, 한번의 가공으로 반제품을 만들 수가 있으며, 이렇게 가공되는 풀리는 가공단계가 제1실시예보다 훨씬 줄어든다.Since the material used in the second embodiment is a cold forged material, the process order is significantly shorter than that of the steel sheet used in the first embodiment. Thus, the semifinished product can be made in one process, and the pulley processed in this way is much less than in the first embodiment.
이상과 같이 설명한 본 발명에 의하면, 소결주조로 제작되는 풀리가 전조작업으로 제작됨에 따라, 제조공정이 수월해지고 이렇게 제작된 풀리의 제조원가를 낮출 수 있음은 물론 기계적 성질이 월등히 향상된다.According to the present invention as described above, as the pulley produced by sinter casting is produced by a rolling operation, the manufacturing process is facilitated and the manufacturing cost of the pulley thus produced can be lowered as well as the mechanical properties are significantly improved.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020000022687A KR100345751B1 (en) | 2000-04-28 | 2000-04-28 | method of manufacturing a roll-forming pulley for water-pump |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020000022687A KR100345751B1 (en) | 2000-04-28 | 2000-04-28 | method of manufacturing a roll-forming pulley for water-pump |
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| Publication Number | Publication Date |
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| KR20000037488A true KR20000037488A (en) | 2000-07-05 |
| KR100345751B1 KR100345751B1 (en) | 2002-07-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100885977B1 (en) * | 2007-07-04 | 2009-03-03 | (주) 정광기술 | Crown-forming apparatus of pulley for vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08121575A (en) * | 1994-10-24 | 1996-05-14 | Nippon Isueede Kk | Installation method of boss on pulley plate |
| JP3475044B2 (en) * | 1997-06-20 | 2003-12-08 | 小島プレス工業株式会社 | Manufacturing method of damper pulley |
| JPH11123485A (en) * | 1997-10-27 | 1999-05-11 | Nippon Isueedo Kk | Formation of boss part in metallic disk being pulley stock |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100885977B1 (en) * | 2007-07-04 | 2009-03-03 | (주) 정광기술 | Crown-forming apparatus of pulley for vehicle |
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