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WO2016072716A1 - Method of manufacturing motor case of motor for automotive fuel injection device - Google Patents

Method of manufacturing motor case of motor for automotive fuel injection device Download PDF

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Publication number
WO2016072716A1
WO2016072716A1 PCT/KR2015/011726 KR2015011726W WO2016072716A1 WO 2016072716 A1 WO2016072716 A1 WO 2016072716A1 KR 2015011726 W KR2015011726 W KR 2015011726W WO 2016072716 A1 WO2016072716 A1 WO 2016072716A1
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WO
WIPO (PCT)
Prior art keywords
motor case
end cover
manufacturing
main body
cover coupling
Prior art date
Application number
PCT/KR2015/011726
Other languages
French (fr)
Korean (ko)
Inventor
임귀성
이영계
김현수
윤석민
Original Assignee
(주)태화기업
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Publication date
Application filed by (주)태화기업 filed Critical (주)태화기업
Publication of WO2016072716A1 publication Critical patent/WO2016072716A1/en

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Classifications

    • 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
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • 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
    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/005—Multi-stage presses
    • 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
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/02—Stabbing or piercing, e.g. for making sieves
    • 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
    • B21D51/00—Making hollow objects
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/14—Casings; Enclosures; Supports

Definitions

  • the present invention relates to a method of manufacturing a motor case. More specifically, the present invention relates to a method of manufacturing a motor case that can be manufactured by a novel process to improve the quality of a product.
  • a motor used in a vehicle fuel injection device uses a small motor of about 5 cm in height.
  • the shape of the motor case applied to such a motor is shown in FIG.
  • the motor case 100 of the motor for automobile fuel injection device has a cylindrical shape of the upper and lower openings. It includes a main body portion 101 of the motor case 100, the upper end of the main body portion 101 is formed with an end cover coupling portion 102, the stepped portion 102a inside the end cover coupling portion 102 Although it is formed, the upper part becomes the end cover coupling part 102 and the lower part becomes the main-body part 101 by making the step
  • the lower part of the main body part 101 is an open part and forms the lower opening part 103.
  • FIG. 2 is a cross-sectional view showing a process of each step of manufacturing a conventional motor case 100.
  • the circular metal plate is processed into a cup shape similar to that of the motor case by several drawing processes.
  • an approximate shape of the end cover coupling portion 102 formed on the main body portion 101 is formed by a drawing process.
  • the diameter (meaning the inner diameter or the outer diameter) of the end cover coupling portion 102 has a larger size when compared with the diameter of the main body portion 101.
  • the next step (g) is a piercing process, in which the lower opening 103 is formed by opening the lower part of the main body 101 by the piercing process.
  • the next step (h) is the restriking process, which makes the shape and dimensions of the motor case identical to the final product in accordance with the required specifications.
  • the outer diameter of the end cover coupling portion 102 is formed to be equal to or slightly larger than the outer diameter of the main body portion 101
  • the inner diameter of the end cover coupling portion 102 is slightly smaller than the inner diameter of the body portion 101.
  • the stepped portion 102a is formed.
  • the final product is completed through a trimming process of cutting out the remaining material connected to the upper end cover coupling portion 102.
  • the end cover coupling portion 102 when forming the end cover coupling portion 102 is formed by a process of gradually forming a shape having a larger diameter than the main body portion 101 by drawing, the material remaining on the upper When the removal is performed by the trimming process, the direction of the burr formed around the upper end of the end cover coupling portion 102 is directed outward.
  • the direction of the burrs is formed outward in this way, when the end cover is coupled to the end cover coupling part 102, problems such as chipping or peeling of the paint occur in the motor case due to the direction of the burrs. There was a problem that went bad.
  • the present inventors place the end cover coupling portion 102 downward, and process it by a continuous drawing process of extending the end cover coupling portion from the inside to the outside so that the direction of the bur is not directed outward.
  • a new manufacturing method that can improve the quality of the product.
  • An object of the present invention is to provide a method for manufacturing a motor case of a motor for an automobile fuel injection device in which the direction of the burr is directed toward the inside of the motor case by applying the step of expanding the end cover coupling portion.
  • Another object of the present invention is to provide a method for manufacturing a motor case of a motor for an automobile fuel injection device that can improve the quality of the motor case.
  • the method of manufacturing a motor case according to the present invention includes an upper cover and a lower cover of a main body portion, an upper end of which is formed to have a step in the upper portion of the main body portion, and an upper portion of an open end cover coupling portion and a lower portion of the body portion.
  • the burring process may be repeated two or more times.
  • after the burring process may further include a first list-lining process for determining the dimensions of the body portion of the motor case.
  • the expansion drawing process may be repeated two or more times.
  • the present invention may further include a second list-writing process for determining the dimensions of the end cover coupling portion after the expansion drawing process.
  • a trimming process for removing the material around the lower opening may be further included after the second re-listing process.
  • the present invention manufactures a motor case of a motor for an automobile fuel injection device capable of improving the quality of the motor case by directing the burr toward the inside of the motor case by expanding the inside by the drawing process when forming the end cover coupling part. It has the effect of the invention providing a method.
  • FIG. 1 is a perspective view showing a motor case of a motor for an automobile fuel injection device.
  • FIG. 2 is a flowchart illustrating a manufacturing process of a motor case of a motor for a vehicle fuel injection device according to the related art.
  • Figure 3 is a flow chart showing the step of producing a motor case of the motor for an automobile fuel injection device according to the present invention in each step.
  • Figure 4 is a flow chart showing the manufacturing process of the motor case of the motor for automobile fuel injection device according to the present invention in a step-by-step perspective view.
  • Figure 3 is a flow chart showing the manufacturing method of the motor case 100 of the motor for vehicle fuel injection device according to the present invention in a cross-sectional view of each step
  • Figure 4 is a flow chart shown in a perspective view of each step.
  • the method for manufacturing a motor case according to the present invention includes steps (a) to (i), some of which may be omitted or repeatedly applied.
  • the manufacturing method of the motor case according to the present invention starts by supplying a circular thin metal sheet to a press apparatus capable of continuous plastic working.
  • the process of each step is performed by suitably applying the shapes of the punch and the mold to the press upper and lower dies.
  • the motor case according to the present invention is to be applied to a small motor so as to perform each process continuously by using a progressive die (progressive die).
  • the circular metal sheet supplied to the press apparatus is, in step (a), drawn into a convex bowl shape.
  • step (b) iterative drawing is processed to form a diameter and increase depth.
  • the initial drawing process for manufacturing the shape of the motor case may be made of two drawing processes according to step (a) and step (b) as shown in FIG. 3, but is not necessarily limited to these two step drawing processes, At least one more drawing process may be added.
  • Step (c) is a center piercing process that drills a hole in the center of the bottom of the motor case.
  • the end cover coupling portion 102 of the motor case 100 is formed at the bottom of the case in each process. That is, in step (c), a hole is formed in the center of the bottom portion of the shape of the motor case, and the portion around the hole is a portion formed by the end cover coupling portion 102 in a subsequent process.
  • Step (d) is a burring process, in which a drawing process is carried out so that the peripheral portion of the hole formed in step (c) is unfolded by a punch of a press upper die. Such a burring process is performed at least once, and may be repeatedly processed two or more times. In step (d), the peripheral portion of the hole is unfolded downward so that this portion can be machined into the end cover coupling 102.
  • Step (e) is a step of determining the dimensions of the motor case including the shape of the end cover coupling portion 102 processed in step (d) in a first restriking process.
  • the inner diameter dimension of the main body portion 101 coincides with the inner diameter of the end cover engaging portion 102, and the outer diameter dimension of the main body portion 101 is slightly larger than the outer diameter dimension of the end cover engaging portion 102. Is formed. At the distal end of the end cover engagement portion 102 there are other parts than the required dimensions.
  • Step (f) is a piercing process, in which, in addition to the dimensions determined in step (e), an unnecessary portion of the end of the end cover coupling portion 102 is removed. That is, the process of drilling a hole as much as the inner diameter of the motor case 100 in the end of the end cover coupling portion 102.
  • Step (g) is an expansion drawing process, in which the inner diameter dimension of the end cover coupling portion 102 is increased.
  • This expansion drawing process may be repeatedly performed two or more times as necessary.
  • the inner diameter of the end cover coupling portion 102 is enlarged by the expansion drawing process, and the outer diameter is formed to be substantially equal to or slightly larger than the outer diameter of the main body portion 101.
  • the step cover 102a and the step 102a inside the main body 101 are formed.
  • Step (h) is a step of determining the final dimensions of the main body portion 101 and the end cover coupling portion 102 of the motor case 100 in the second rewriting process.
  • Step (i) is a trimming process, in which unnecessary materials are cut off and removed around the lower opening 103 of the motor case 100. After step (i), the finished motor case is processed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

A method of manufacturing a motor case according to the present invention relates to a method of manufacturing a motor case including a main body portion having the top and bottom thereof open, an end cover coupling portion formed on top of the main body portion to have a step therein and the top thereof open, and a bottom open portion that is an open portion at the bottom of the main body portion, and is characterized by comprising: a drawing process for processing a circular metal plate into a cup shape; a center piercing process for forming a hole in the central portion of the floor of the cup shape; a burring process of opening up the area around the hole in order to form the end cover coupling portion; a piercing process of cutting away vertical parts of the portion opened up through the burring process; and a tube expanding drawing process for expanding the inner diameter of the portion opened up through the burring process.

Description

자동차 연료분사장치용 모터의 모터 케이스 제조 방법Manufacturing method of motor case of motor for automobile fuel injection device
본 발명은 모터 케이스의 제조 방법에 관한 것이다. 보다 구체적으로 본 발명은 신규의 공정에 의하여 제조되어 제품의 품질을 향상시킬 수 있는 모터 케이스의 제조 방법에 관한 것이다.The present invention relates to a method of manufacturing a motor case. More specifically, the present invention relates to a method of manufacturing a motor case that can be manufactured by a novel process to improve the quality of a product.
일반적으로 자동차 연료분사장치에 사용되는 모터는 높이가 약 5 cm 이내의 소형 모터가 사용된다. 이러한 모터에 적용되는 모터 케이스의 형상을 도 1에 도시하였다.In general, a motor used in a vehicle fuel injection device uses a small motor of about 5 cm in height. The shape of the motor case applied to such a motor is shown in FIG.
도 1을 참조하면, 자동차 연료분사장치용 모터의 모터 케이스(100)는 상부 및 하부가 개방된 원통형의 형상을 가진다. 모터 케이스(100)의 본체부(101)를 포함하며, 본체부(101)의 상부에는 엔드 커버 결합부(102)가 형성되어 있고, 엔드 커버 결합부(102)의 내측에는 단차(102a)가 형성되어 있는데, 단차(102a)를 경계로 하여 그 상부는 엔드 커버 결합부(102)가 되고, 그 하부는 본체부(101)가 된다. 본체부(101)의 하부는 개방된 부분으로 하부 개방부(103)를 이루고 있다.Referring to Figure 1, the motor case 100 of the motor for automobile fuel injection device has a cylindrical shape of the upper and lower openings. It includes a main body portion 101 of the motor case 100, the upper end of the main body portion 101 is formed with an end cover coupling portion 102, the stepped portion 102a inside the end cover coupling portion 102 Although it is formed, the upper part becomes the end cover coupling part 102 and the lower part becomes the main-body part 101 by making the step | step 102a boundary. The lower part of the main body part 101 is an open part and forms the lower opening part 103.
이러한 모터 케이스(100)를 제조하는 종래의 방법에 대해 도 2를 참조하여 설명한다. 도 2는 종래의 모터 케이스(100)를 제조하는 각 단계의 공정을 단면으로 나타내고 있다. 먼저, 단계 (a) 내지 (c)에서와 같이, 원형의 금속 판재를 여러 차례의 드로잉 공정에 의해 모터 케이스의 형상과 유사한 컵 형상으로 가공한다. 다음 단계 (d)에서 본체부(101) 상부에 형성되는 엔드 커버 결합부(102)의 대략적인 형상을 드로잉 공정에 의해 형성한다. 이 때, 엔드 커버 결합부(102)의 직경(내경 또는 외경을 의미한다)은 본체부(101)의 직경과 비교하였을 때 더 큰 크기를 갖는다. 다음 단계(e), (f)에서의 드로잉 공정을 거치면서 본체부(101)와 엔드 커버 결합부(102)의 형상이 최종 제품과 가까운 형상으로 다듬어 진다. 다음 단계 (g)는 피어싱 공정으로, 본체부(101)의 하부를 피어싱 공정에 의하여 개방시킴으로써 하부 개방부(103)를 형성한다. A conventional method of manufacturing such a motor case 100 will be described with reference to FIG. 2. 2 is a cross-sectional view showing a process of each step of manufacturing a conventional motor case 100. First, as in steps (a) to (c), the circular metal plate is processed into a cup shape similar to that of the motor case by several drawing processes. In the next step (d), an approximate shape of the end cover coupling portion 102 formed on the main body portion 101 is formed by a drawing process. At this time, the diameter (meaning the inner diameter or the outer diameter) of the end cover coupling portion 102 has a larger size when compared with the diameter of the main body portion 101. Through the drawing process in the following steps (e) and (f), the shape of the main body portion 101 and the end cover coupling portion 102 is trimmed to a shape close to the final product. The next step (g) is a piercing process, in which the lower opening 103 is formed by opening the lower part of the main body 101 by the piercing process.
다음 단계 (h)는 리스트라이킹(restriking) 공정으로, 모터 케이스의 형상 및 치수를 요구되는 제원에 맞게 최종 제품과 동일하도록 만드는 공정이다. 이 때, 엔드 커버 결합부(102)의 외경은 본체부(101)의 외경과 같거나 약간 크도록 형성되며, 엔드 커버 결합부(102)의 내경은 본체부(101)의 내경보다는 약간 작도록 형성되어 단차부(102a)가 형성되어 있다. 이후 단계 (i)에서, 엔드 커버 결합부(102) 상부에 연결되어 있는 나머지 재료를 잘라내는 트리밍(trimming) 공정을 통해 최종 제품으로 완성된다.The next step (h) is the restriking process, which makes the shape and dimensions of the motor case identical to the final product in accordance with the required specifications. At this time, the outer diameter of the end cover coupling portion 102 is formed to be equal to or slightly larger than the outer diameter of the main body portion 101, the inner diameter of the end cover coupling portion 102 is slightly smaller than the inner diameter of the body portion 101. The stepped portion 102a is formed. Thereafter, in step (i), the final product is completed through a trimming process of cutting out the remaining material connected to the upper end cover coupling portion 102.
이러한 종래의 제조 방법에 의하면, 엔드 커버 결합부(102)를 형성할 때 본체부(101) 보다 큰 지름의 형상을 드로잉에 의해 형성하여 점차 줄여가는 공정을 통해 형성하기 때문에, 상부에 남아있는 재료를 트리밍 공정에 의해 제거하면 엔드 커버 결합부(102)의 상부 둘레에 형성되는 버(burr)의 방향이 바깥쪽을 향하게 된다. 이렇게 버의 방향이 바깥쪽으로 형성될 경우, 엔드 커버를 엔드 커버 결합부(102)에 결합시킬 때 버의 방향으로 인하여 모터 케이스에 칩(chip)이나 도장 벗겨짐 등의 문제가 발생하여 제품의 품질이 나빠지는 문제점이 있었다.According to this conventional manufacturing method, when forming the end cover coupling portion 102 is formed by a process of gradually forming a shape having a larger diameter than the main body portion 101 by drawing, the material remaining on the upper When the removal is performed by the trimming process, the direction of the burr formed around the upper end of the end cover coupling portion 102 is directed outward. When the direction of the burrs is formed outward in this way, when the end cover is coupled to the end cover coupling part 102, problems such as chipping or peeling of the paint occur in the motor case due to the direction of the burrs. There was a problem that went bad.
이에 본 발명자들은 상술한 문제점을 해결하기 위하여 엔드 커버 결합부(102)를 하부로 위치시키고, 엔드 커버 결합부를 내측으로부터 외측으로 확관시키는 연속적인 드로잉 공정에 의해 가공함으로써 버의 방향을 바깥쪽으로 향하지 않도록 하여 제품의 품질을 향상시킬 수 있는 새로운 제조 방법을 제안하고자 한다.In order to solve the above-described problems, the present inventors place the end cover coupling portion 102 downward, and process it by a continuous drawing process of extending the end cover coupling portion from the inside to the outside so that the direction of the bur is not directed outward. To propose a new manufacturing method that can improve the quality of the product.
본 발명의 목적은 엔드 커버 결합부를 확관시키는 공정을 적용하여 형성함으로써 버의 방향을 모터 케이스의 내측으로 향하도록 한 자동차 연료분사장치용 모터의 모터 케이스의 제조 방법을 제공하는 것이다.An object of the present invention is to provide a method for manufacturing a motor case of a motor for an automobile fuel injection device in which the direction of the burr is directed toward the inside of the motor case by applying the step of expanding the end cover coupling portion.
본 발명의 다른 목적은 모터 케이스의 품질을 향상시킬 수 있는 자동차 연료분사장치용 모터의 모터 케이스의 제조 방법을 제공하는 것이다.Another object of the present invention is to provide a method for manufacturing a motor case of a motor for an automobile fuel injection device that can improve the quality of the motor case.
본 발명의 상기 목적 및 기타 내재되어 있는 목적들은 아래 설명하는 본 발명에 의하여 모두 용이하게 달성될 수 있다.The above and other inherent objects of the present invention can be easily achieved by the present invention described below.
본 발명에 따른 모터 케이스의 제조 방법은 상부 및 하부가 개방된 본체부, 상기 본체부의 상부에 내측에 단차를 갖도록 형성되고 상부가 개방된 엔드 커버 결합부 및 상기 본체부 하부에 개방된 부분인 하부 개방부를 포함하여 이루어지는 모터 케이스의 제조 방법에 있어서,The method of manufacturing a motor case according to the present invention includes an upper cover and a lower cover of a main body portion, an upper end of which is formed to have a step in the upper portion of the main body portion, and an upper portion of an open end cover coupling portion and a lower portion of the body portion. In the manufacturing method of the motor case which comprises an opening part,
원형의 금속 판재를 컵 형상으로 가공하는 드로잉 공정;A drawing step of processing a circular metal plate into a cup shape;
상기 컵 형상의 바닥의 중심부에 구멍을 형성하는 센터 피어싱 공정;A center piercing step of forming a hole in the center of the cup-shaped bottom;
상기 엔드 커버 결합부를 형성하기 위하여 상기 구멍의 주위를 펼치는 버링 공정;A burring process of spreading the periphery of the hole to form the end cover coupling portion;
상기 버링 공정을 통해 펼쳐진 부분 중 수평 부분을 잘라내는 피어싱 공정; 및A piercing process of cutting out a horizontal portion of the unfolded portion through the burring process; And
상기 버링 공정을 통해 펼쳐진 부분의 내경을 확대시키기 위한 확관 드로잉 공정;An expansion drawing process for enlarging the inner diameter of the unfolded portion through the burring process;
을 포함하여 이루어지는 것을 특징으로 한다.Characterized in that comprises a.
본 발명에서, 상기 버링 공정은 2 회 이상 반복되어 수행되어도 좋다.In the present invention, the burring process may be repeated two or more times.
본 발명에서, 상기 버링 공정 이후에 상기 모터 케이스의 본체부의 치수를 확정하기 위한 제1 리스트라이킹 공정을 더 포함하여도 좋다.In the present invention, after the burring process may further include a first list-lining process for determining the dimensions of the body portion of the motor case.
본 발명에서, 상기 확관 드로잉 공정은 2 회 이상 반복되어 수행되어도 좋다.In the present invention, the expansion drawing process may be repeated two or more times.
본 발명에서, 상기 확관 드로잉 공정 이후에 상기 엔드 커버 결합부의 치수를 확정하기 위한 제2 리스트라이킹 공정을 더 포함하여도 좋다.The present invention may further include a second list-writing process for determining the dimensions of the end cover coupling portion after the expansion drawing process.
본 발명에서, 상기 제2 리스트라이킹 공정 이후에 상기 하부 개방부의 주변에 있는 재료를 제거하기 위한 트리밍 공정을 더 포함하여도 좋다.In the present invention, a trimming process for removing the material around the lower opening may be further included after the second re-listing process.
본 발명은 엔드 커버 결합부를 형성할 때 드로잉 공정에 의해 내부를 확관시킴으로써 버의 방향을 모터 케이스의 내측으로 향하도록 하여 모터 케이스의 품질을 향상시킬 수 있는 자동차 연료분사장치용 모터의 모터 케이스의 제조 방법을 제공하는 발명의 효과를 갖는다.The present invention manufactures a motor case of a motor for an automobile fuel injection device capable of improving the quality of the motor case by directing the burr toward the inside of the motor case by expanding the inside by the drawing process when forming the end cover coupling part. It has the effect of the invention providing a method.
도 1은 자동차 연료분사장치용 모터의 모터 케이스를 나타낸 사시도이다.1 is a perspective view showing a motor case of a motor for an automobile fuel injection device.
도 2는 종래기술에 따른 자동차 연료분사장치용 모터의 모터 케이스의 제조 공정을 나타낸 순서도이다.2 is a flowchart illustrating a manufacturing process of a motor case of a motor for a vehicle fuel injection device according to the related art.
도 3은 본 발명에 따른 자동차 연료분사장치용 모터의 모터 케이스의 제조 공정을 각 단계별 단면도로 나타낸 순서도이다.Figure 3 is a flow chart showing the step of producing a motor case of the motor for an automobile fuel injection device according to the present invention in each step.
도 4는 본 발명에 따른 자동차 연료분사장치용 모터의 모터 케이스의 제조 공정을 각 단계별 사시도로 나타낸 순서도이다.Figure 4 is a flow chart showing the manufacturing process of the motor case of the motor for automobile fuel injection device according to the present invention in a step-by-step perspective view.
이하에서는 첨부된 도면을 참조로 하여 본 발명에 대하여 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.
도 3은 본 발명에 따른 자동차 연료분사장치용 모터의 모터 케이스(100)의 제조 방법을 각 단계별 단면도로 나타낸 순서도이고, 도 4는 각 단계별 사시도로 나타낸 순서도이다.Figure 3 is a flow chart showing the manufacturing method of the motor case 100 of the motor for vehicle fuel injection device according to the present invention in a cross-sectional view of each step, Figure 4 is a flow chart shown in a perspective view of each step.
도 3 및 도 4에 도시된 바와 같이, 본 발명에 따른 모터 케이스의 제조 방법은 단계 (a) 내지 단계 (i)를 포함하며, 이들 중 일부 단계는 생략되거나 반복하여 적용될 수 있다.As shown in Figures 3 and 4, the method for manufacturing a motor case according to the present invention includes steps (a) to (i), some of which may be omitted or repeatedly applied.
본 발명에 따른 모터 케이스의 제조 방법은 원형의 얇은 금속 판재를 연속적인 소성 가공이 가능한 프레스 장치에 공급하는 것으로 시작된다. 각 단계에서 프레스 상형 및 하형에 펀치 및 금형의 형상을 적절하게 적용함으로써 각 단계의 공정을 수행한다. 바람직하게, 본 발명에 따른 모터 케이스는 소형 모터에 적용되는 것이므로 프로그레시브 금형(progressive die)을 이용하여 연속적으로 각 공정을 수행하도록 한다.The manufacturing method of the motor case according to the present invention starts by supplying a circular thin metal sheet to a press apparatus capable of continuous plastic working. In each step, the process of each step is performed by suitably applying the shapes of the punch and the mold to the press upper and lower dies. Preferably, the motor case according to the present invention is to be applied to a small motor so as to perform each process continuously by using a progressive die (progressive die).
프레스 장치로 공급된 원형의 금속 판재는 단계 (a)에서, 아래로 볼록한 그릇(bowl) 형상으로 드로잉(drawing) 가공된다. 다음 단계 (b)에서, 반복적인 드로잉 가공을 통해 지름이 줄고 깊이가 늘어난 형성으로 가공된다. 모터 케이스의 형상을 제조하기 위한 초기 드로잉 공정은 도 3에서와 같이 단계 (a)와 단계 (b)에 따른 2 차례의 드로잉 공정으로 이루어질 수도 있지만 반드시 이러한 두 단계의 드로잉 공정에 한정되는 것은 아니며, 최소한 한 번 이상의 드로잉 공정이 더 추가될 수도 있다.The circular metal sheet supplied to the press apparatus is, in step (a), drawn into a convex bowl shape. In the next step (b), iterative drawing is processed to form a diameter and increase depth. The initial drawing process for manufacturing the shape of the motor case may be made of two drawing processes according to step (a) and step (b) as shown in FIG. 3, but is not necessarily limited to these two step drawing processes, At least one more drawing process may be added.
단계 (c)는 모터 케이스의 바닥부의 중심에 구멍을 뚫는 센터 피어싱(center piercing) 공정이다. 본 발명에 따른 모터 케이스의 제조 방법에서, 모터 케이스(100)의 엔드 커버 결합부(102)는 각 공정에서 케이스 하부에서 형성된다. 즉, 단계 (c)에서, 모터 케이스의 형상의 바닥부의 중심에 구멍을 형성하는데, 이 구멍의 주변의 부분이 이후의 공정에서 엔드 커버 결합부(102)로 형성되는 부분이다.Step (c) is a center piercing process that drills a hole in the center of the bottom of the motor case. In the manufacturing method of the motor case according to the present invention, the end cover coupling portion 102 of the motor case 100 is formed at the bottom of the case in each process. That is, in step (c), a hole is formed in the center of the bottom portion of the shape of the motor case, and the portion around the hole is a portion formed by the end cover coupling portion 102 in a subsequent process.
단계 (d)는 버링(burring) 공정으로, 프레스 상형의 펀치에 의하여 단계 (c)에서 형성된 구멍의 주위 부분이 아래로 펼쳐지도록 드로잉 가공을 한다. 이와 같은 버링 공정은 최소한 한 번 이상 수행되며, 2회 이상으로 반복하여 가공할 수도 있다. 단계 (d)에서, 구멍의 주위 부분이 아래로 펼쳐짐으로써, 이 부분이 엔드 커버 결합부(102)로 가공될 수 있도록 한다.Step (d) is a burring process, in which a drawing process is carried out so that the peripheral portion of the hole formed in step (c) is unfolded by a punch of a press upper die. Such a burring process is performed at least once, and may be repeatedly processed two or more times. In step (d), the peripheral portion of the hole is unfolded downward so that this portion can be machined into the end cover coupling 102.
단계 (e)는 제1 리스트라이킹(restriking) 공정으로, 단계 (d)에서 가공된 엔드 커버 결합부(102) 형상을 포함한 모터 케이스의 치수를 확정하는 단계이다. 단계 (e)에서, 본체부(101)의 내경 치수는 엔드 커버 결합부(102)의 내경과 일치하며, 본체부(101)의 외경 치수는 엔드 커버 결합부(102)의 외경 치수보다 약간 크게 형성된다. 엔드 커버 결합부(102)의 말단에는 필요한 치수 이외의 부분이 존재한다.Step (e) is a step of determining the dimensions of the motor case including the shape of the end cover coupling portion 102 processed in step (d) in a first restriking process. In step (e), the inner diameter dimension of the main body portion 101 coincides with the inner diameter of the end cover engaging portion 102, and the outer diameter dimension of the main body portion 101 is slightly larger than the outer diameter dimension of the end cover engaging portion 102. Is formed. At the distal end of the end cover engagement portion 102 there are other parts than the required dimensions.
단계 (f)는 피어싱 공정으로, 단계 (e)에서 확정된 치수 이외에 엔드 커버 결합부(102) 말단의 불필요한 부분을 제거하는 단계이다. 즉, 엔드 커버 결합부(102)의 말단에 모터 케이스(100)의 내경 크기 만큼의 구멍을 뚫는 공정이다.Step (f) is a piercing process, in which, in addition to the dimensions determined in step (e), an unnecessary portion of the end of the end cover coupling portion 102 is removed. That is, the process of drilling a hole as much as the inner diameter of the motor case 100 in the end of the end cover coupling portion 102.
단계 (g)는 확관 드로잉 공정으로, 엔드 커버 결합부(102)의 내경 치수를 증가시키는 공정이다. 이러한 확관 드로잉 공정은 필요에 따라 2 회 이상 반복하여 수행될 수도 있다. 확관 드로잉 공정에 의해 엔드 커버 결합부(102)의 내경은 확대되고, 외경은 본체부(101)의 외경과 거의 같거나 약간 크게 형성된다. 이 공정을 통해 엔드 커버 결합부(102)와 본체부(101) 내부의 단차(102a)가 형성된다.Step (g) is an expansion drawing process, in which the inner diameter dimension of the end cover coupling portion 102 is increased. This expansion drawing process may be repeatedly performed two or more times as necessary. The inner diameter of the end cover coupling portion 102 is enlarged by the expansion drawing process, and the outer diameter is formed to be substantially equal to or slightly larger than the outer diameter of the main body portion 101. Through this process, the step cover 102a and the step 102a inside the main body 101 are formed.
단계 (h)는 제2 리스트라이킹 공정으로, 모터 케이스(100)의 본체부(101) 및 엔드 커버 결합부(102)의 최종 치수를 확정하는 단계이다.Step (h) is a step of determining the final dimensions of the main body portion 101 and the end cover coupling portion 102 of the motor case 100 in the second rewriting process.
단계 (i)는 트리밍 공정으로, 모터 케이스(100)의 하부 개방부(103)의 주변에 불필요한 재료를 잘라내어 제거하는 공정이다. 단계 (i)를 거쳐 최종 완성된 모터 케이스 제품으로 가공된다.Step (i) is a trimming process, in which unnecessary materials are cut off and removed around the lower opening 103 of the motor case 100. After step (i), the finished motor case is processed.
본 발명에 따른 모터 케이스의 제조 방법에 의하면, 엔드 커버 결합부(102)의 말단 부분에 형성되는 버의 방향이 안쪽으로 형성되기 때문에 종래의 제조 방법에서 버의 방향이 바깥쪽으로 형성됨으로 인한 제품 불량의 문제점을 해결하고 있다.According to the manufacturing method of the motor case according to the present invention, since the direction of the burr formed in the distal end portion of the end cover coupling portion 102 is formed inward, product defects due to the direction of the burr formed outward in the conventional manufacturing method To solve the problem.
이상에서 설명한 본 발명의 상세한 설명은 본 발명의 이해를 위하여 예를 들어 설명한 것에 불과할 뿐, 본 발명의 범위를 정하고자 하는 것이 아님을 이해하여야 한다. 본 발명의 범위는 아래 첨부된 특허청구범위에 의하여 정하여지며, 이 범위 내에서의 단순한 변형이나 변경은 모두 본 발명의 범위에 속하는 것으로 이해되어야 한다.The detailed description of the present invention described above is merely described by way of example for the purpose of understanding the present invention, and it should be understood that it is not intended to define the scope of the present invention. The scope of the invention is defined by the claims appended hereto, and it should be understood that all simple modifications and changes within this scope are within the scope of the invention.

Claims (6)

  1. 상부 및 하부가 개방된 본체부, 상기 본체부의 상부에 내측에 단차를 갖도록 형성되고 상부가 개방된 엔드 커버 결합부 및 상기 본체부 하부에 개방된 부분인 하부 개방부를 포함하여 이루어지는 모터 케이스의 제조 방법에 있어서,A method of manufacturing a motor case comprising a main body portion having an upper portion and a lower portion opened, an end cover coupling portion formed to have a step inside the upper portion of the main body portion, and a lower opening portion which is an open portion under the body portion. To
    원형의 금속 판재를 컵 형상으로 가공하는 드로잉 공정;A drawing step of processing a circular metal plate into a cup shape;
    상기 컵 형상의 바닥의 중심부에 구멍을 형성하는 센터 피어싱 공정;A center piercing step of forming a hole in the center of the cup-shaped bottom;
    상기 엔드 커버 결합부를 형성하기 위하여 상기 구멍의 주위를 펼치는 버링 공정;A burring process of spreading the periphery of the hole to form the end cover coupling portion;
    상기 버링 공정을 통해 펼쳐진 부분 중 수평 부분을 잘라내는 피어싱 공정; 및A piercing process of cutting out a horizontal portion of the unfolded portion through the burring process; And
    상기 버링 공정을 통해 펼쳐진 부분의 내경을 확대시키기 위한 확관 드로잉 공정;An expansion drawing process for enlarging the inner diameter of the unfolded portion through the burring process;
    을 포함하여 이루어지는 것을 특징으로 하는 모터 케이스의 제조 방법.Method for producing a motor case comprising a.
  2. 제1항에 있어서, 상기 버링 공정은 2 회 이상 반복되어 수행되는 것을 특징으로 하는 모터 케이스의 제조 방법.The method of claim 1, wherein the burring process is repeated two or more times.
  3. 제1항 또는 제2항에 있어서, 상기 버링 공정 이후에 상기 모터 케이스의 본체부의 치수를 확정하기 위한 제1 리스트라이킹 공정을 더 포함하는 것을 특징으로 하는 모터 케이스의 제조 방법.The method of manufacturing a motor case according to claim 1 or 2, further comprising a first list-writing process for determining the dimensions of the main body of the motor case after the burring process.
  4. 제1항에 있어서, 상기 확관 드로잉 공정은 2 회 이상 반복되어 수행되는 것을 특징으로 하는 모터 케이스의 제조 방법.The method of claim 1, wherein the expansion drawing process is repeated two or more times.
  5. 제1항에 있어서, 상기 확관 드로잉 공정 이후에 상기 엔드 커버 결합부의 치수를 확정하기 위한 제2 리스트라이킹 공정을 더 포함하는 것을 특징으로 하는 모터 케이스의 제조 방법.The method of manufacturing a motor case according to claim 1, further comprising a second list-writing process for determining the dimensions of the end cover coupling portion after the expansion drawing process.
  6. 제5항에 있어서, 상기 제2 리스트라이킹 공정 이후에 상기 하부 개방부의 주변에 있는 재료를 제거하기 위한 트리밍 공정을 더 포함하는 것을 특징으로 하는 모터 케이스의 제조 방법.6. The method of claim 5, further comprising a trimming process for removing material around the lower opening after the second list-writing process.
PCT/KR2015/011726 2014-11-03 2015-11-03 Method of manufacturing motor case of motor for automotive fuel injection device WO2016072716A1 (en)

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KR100399591B1 (en) * 2000-03-22 2003-09-26 주식회사 대흥알앤티 Method of making case of strut bearing using boards
KR101028752B1 (en) * 2009-06-29 2011-04-14 (주)태화기업 forming method of bearing motor case
KR20130042725A (en) * 2011-10-19 2013-04-29 주식회사 동양테크 Method of manufacturing all-in-one type rear lower arm and all-in-one type rear lower arm made by the method
JP2013154357A (en) * 2012-01-27 2013-08-15 Tamura Seisakusho:Kk Burring device
KR101251043B1 (en) * 2012-03-30 2013-04-05 프로텍코리아 주식회사 Tap plate manufacturing method and its apparutus

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