KR20160051383A - Method for Manufacturing Motor Case for Fuel Injection Apparatus of Automobile - Google Patents

Method for Manufacturing Motor Case for Fuel Injection Apparatus of Automobile Download PDF

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Publication number
KR20160051383A
KR20160051383A KR1020140151287A KR20140151287A KR20160051383A KR 20160051383 A KR20160051383 A KR 20160051383A KR 1020140151287 A KR1020140151287 A KR 1020140151287A KR 20140151287 A KR20140151287 A KR 20140151287A KR 20160051383 A KR20160051383 A KR 20160051383A
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KR
South Korea
Prior art keywords
motor case
manufacturing
end cover
main body
motor
Prior art date
Application number
KR1020140151287A
Other languages
Korean (ko)
Other versions
KR101650248B1 (en
Inventor
임귀성
이영계
김현수
윤석민
Original Assignee
(주)태화기업
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)태화기업 filed Critical (주)태화기업
Priority to KR1020140151287A priority Critical patent/KR101650248B1/en
Priority to PCT/KR2015/011726 priority patent/WO2016072716A1/en
Publication of KR20160051383A publication Critical patent/KR20160051383A/en
Application granted granted Critical
Publication of KR101650248B1 publication Critical patent/KR101650248B1/en

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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
    • 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
    • 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
    • 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

Abstract

A method of manufacturing a motor case according to the present invention is a method of manufacturing a motor case, comprising: a main body portion having upper and lower openings; an end cover engaging portion formed at an upper portion of the main body portion, A method of manufacturing a motor case, the method comprising: a drawing step of machining a circular metal plate into a cup shape; A center piercing step of forming a hole in the center of the cup-shaped bottom; A burring process for expanding the perimeter of the hole to form the end cover engagement portion; A piercing process for cutting out a horizontal portion of the unfolded portion through the burring process; And an enlargement drawing process for enlarging an inner diameter of the unfolded portion through the burring process.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of manufacturing a motor case for a motor for a fuel injector,

The present invention relates to a method of manufacturing a motor case. More particularly, the present invention relates to a method of manufacturing a motor case, which can be manufactured by a novel process to improve the quality of a product.

Generally, a motor used in an automobile fuel injecting apparatus is a small motor having a height of about 5 cm or less. The shape of a motor case applied to such a motor is shown in Fig.

1, a motor case 100 of a motor for an automotive fuel injector has a cylindrical shape with open top and bottom. An end cover engaging portion 102 is formed on an upper portion of the main body portion 101 and a step 102a is formed on the inner side of the end cover engaging portion 102 And the upper portion thereof serves as the end cover engagement portion 102 with the stepped portion 102a as a boundary, and the lower portion thereof serves as the main body portion 101. [ The lower portion of the body portion 101 is an open portion and forms a lower opening portion 103.

A conventional method for manufacturing such a motor case 100 will be described with reference to Fig. FIG. 2 is a cross-sectional view showing a process of each step of manufacturing the conventional motor case 100. As shown in FIG. First, as in steps (a) to (c), a circular metal plate is processed into a cup shape similar to the shape of the motor case by a plurality of drawing processes. In the next step (d), the approximate shape of the end cover engaging portion 102 formed on the main body 101 is formed by a drawing process. At this time, the diameter (meaning inner diameter or outer diameter) of the end cover engaging portion 102 has a larger size when compared with the diameter of the main body portion 101. The shapes of the body 101 and the end cover engaging portion 102 are polished to a shape close to the final product while the drawing process in the following steps (e) and (f) is performed. The next step (g) is a piercing step, which forms the lower opening 103 by opening the lower portion of the body portion 101 by a piercing process.

The next step (h) is a restriking process, in which the shape and dimensions of the motor case are made identical to the final product in accordance with the required specifications. The inner diameter of the end cover engaging portion 102 is formed to be equal to or slightly larger than the outer diameter of the body portion 101 so that the inner diameter of the end cover engaging portion 102 is slightly smaller than the inner diameter of the body portion 101 And a stepped portion 102a is formed. In the following step (i), the final product is completed through a trimming process in which the remaining material connected to the upper end of the end cover engaging portion 102 is cut out.

According to such a conventional manufacturing method, when the end cover engaging portion 102 is formed, a shape having a diameter larger than that of the main body portion 101 is formed by drawing and gradually reduced, so that the remaining material The direction of the burr formed around the upper end of the end cover engaging portion 102 is directed to the outside. When the direction of the bur is formed outwardly, when the end cover is coupled to the end cover engaging portion 102, there arises a problem such as chip or paint peeling in the motor case due to the direction of the bur, There was a problem that it was bad.

In order to solve the above-described problems, the inventors of the present invention fabricated the end cover engagement portion 102 in a lower position and a continuous drawing process in which the end cover engagement portion is expanded outwardly from the inside to prevent the burr direction from being directed outward And to propose a new manufacturing method which can improve the quality of the product.

An object of the present invention is to provide a method of manufacturing a motor case of a motor for an automotive fuel injector in which the direction of the bur is directed toward the inside of the motor case by forming a process of expanding the end cover engaging portion.

Another object of the present invention is to provide a method of manufacturing a motor case of a motor for an automotive fuel injector capable of improving the quality of a motor case.

The above objects and other intrinsic objects of the present invention can be easily achieved by the present invention described below.

A method of manufacturing a motor case according to the present invention is a method of manufacturing a motor case, comprising: a main body portion having upper and lower openings; an end cover engaging portion formed at an upper portion of the main body portion, A method of manufacturing a motor case, comprising the steps of:

A drawing process of processing a circular metal plate into a cup shape;

A center piercing step of forming a hole in the center of the cup-shaped bottom;

A burring process for expanding the perimeter of the hole to form the end cover engagement portion;

A piercing process for cutting out a horizontal portion of the unfolded portion through the burring process; And

An enlargement drawing process for enlarging an inner diameter of the unfolded portion through the burring process;

And a control unit.

In the present invention, the burring process may be repeatedly performed two or more times.

The present invention may further include a first lifting step for fixing the dimension of the main body of the motor case after the burring step.

In the present invention, the deep drawing process may be repeated two or more times.

In the present invention, it may further comprise a second lifting step for fixing the dimension of the end cover engaging part after the expanding drawing step.

The present invention may further comprise a trimming step for removing the material in the periphery of the lower opening after the second lifting step.

The present invention relates to a motor case of a motor for an automotive fuel injector which can improve the quality of a motor case by making the direction of burrs toward the inside of a motor case by expanding the inside by a drawing process when forming an end cover engaging part The present invention has the effect of providing the method.

1 is a perspective view showing a motor case of a motor for an automotive fuel injector.
2 is a flowchart showing a manufacturing process of a motor case of a motor for a vehicle fuel injection apparatus according to the related art.
3 is a flowchart showing a process of manufacturing a motor case of a motor for an automotive fuel injector according to the present invention.
4 is a flowchart illustrating a process of manufacturing a motor case of a motor for an automotive fuel injector according to an embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a flowchart showing a manufacturing method of a motor case 100 of a motor for a motor vehicle fuel injection device according to the present invention, and FIG. 4 is a flowchart showing a perspective view of each step.

As shown in Figs. 3 and 4, the method of manufacturing a motor case according to the present invention includes steps (a) to (i), and some of these steps may be omitted or repeatedly applied.

A method of manufacturing a motor case according to the present invention starts with supplying a circular thin metal plate to a press apparatus capable of continuous plastic working. In each step, the process of each step is carried out by appropriately applying the shape of the punch and the mold to the upper and lower molds of the press. Preferably, the motor case according to the present invention is applied to a small-sized motor, so that each process is continuously performed using a progressive die.

The round metal sheet fed to the press apparatus is, in step (a), drawn in the form of a downward convex bowl. In the next step (b), it is machined into a reduced diameter, deeper formation through repetitive drawing. The initial drawing process for manufacturing the shape of the motor case may be performed by two drawing processes according to steps (a) and (b) as shown in FIG. 3, but it is not limited to the drawing process of these two steps, At least one more drawing process may be added.

Step (c) is a center piercing process that punches the center of the bottom of the motor case. In the method of manufacturing the motor case according to the present invention, the end cover engagement portion 102 of the motor case 100 is formed at the bottom of the case in each step. That is, in step (c), a hole is formed at the center of the bottom of the shape of the motor case, and the peripheral portion of the hole is a portion formed in the end cover engagement portion 102 in a subsequent process.

Step (d) is a burring process, in which the peripheral portion of the hole formed in step (c) is drawn down by the punch of the press mold. The burring process is performed at least once, and the burring process may be repeatedly performed two or more times. In step (d), the peripheral portion of the hole is unfolded down so that this portion can be machined into the end cover engagement portion 102.

Step (e) is a first step of restriking, which is a step of determining the dimensions of the motor case including the shape of the end cover engagement portion 102 processed in Step (d). In step (e), the inner diameter dimension of the main body section 101 coincides with the inner diameter of the end cover engagement section 102, and the outer diameter dimension of the main body section 101 is slightly larger than the outer diameter dimension of the end cover engagement section 102 . There is a portion other than the required dimension at the end of the end cover engaging portion 102.

Step (f) is a piercing process, which removes an unnecessary portion of the end of the end cover engaging portion 102 other than the dimension determined in Step (e). That is, it is a step of drilling a hole of the inner case size of the motor case 100 at the end of the end cover engagement portion 102.

Step (g) is an enlargement drawing process, which is a step of increasing the inner diameter dimension of the end cover engaging portion 102. [ Such an enlargement drawing process may be repeatedly performed twice or more as necessary. The inner diameter of the end cover engaging portion 102 is enlarged by the deep drawing process and the outer diameter is formed to be substantially equal to or slightly larger than the outer diameter of the body portion 101. [ Through this process, the end cover engagement portion 102 and the step 102a inside the body portion 101 are formed.

Step (h) is a step of fixing the final dimensions of the main body portion 101 and the end cover engagement portion 102 of the motor case 100 in the second step of the re-strike process.

Step (i) is a step of trimming and removing unnecessary material around the lower opening portion 103 of the motor case 100 and removing the unnecessary material. (I), and finally processed into a finished motor case product.

According to the method for manufacturing a motor case according to the present invention, since the direction of the burr formed at the end portion of the end cover engaging portion 102 is formed inward, the product failure due to the burr direction being formed outward in the conventional manufacturing method .

It is to be understood that the detailed description of the present invention has been presented for illustrative purposes only and is not intended to limit the scope of the present invention. It is intended that the scope of the invention be defined by the claims appended hereto, and that all such modifications and variations are intended to be included within the scope of the present invention.

100: motor case 101:
102: end cover coupling portion 103: lower opening portion

Claims (6)

A method of manufacturing a motor case, comprising: a main body portion having an upper portion and a lower portion opened; an end cover engaging portion formed at an upper portion of the main body portion and having an upper stepped portion; In this case,
A drawing process of processing a circular metal plate into a cup shape;
A center piercing step of forming a hole in the center of the cup-shaped bottom;
A burring process for expanding the perimeter of the hole to form the end cover engagement portion;
A piercing process for cutting out a horizontal portion of the unfolded portion through the burring process; And
An enlargement drawing process for enlarging an inner diameter of the unfolded portion through the burring process;
Wherein the motor case is made of a synthetic resin. The method of manufacturing a motor case according to claim 1, wherein the burring process is repeatedly performed two or more times. The method as claimed in claim 1 or 2, further comprising a first lifting step for fixing the dimension of the main body of the motor case after the deburring step. The method of manufacturing a motor case according to claim 1, wherein the enlargement drawing process is performed two or more times. The method as claimed in claim 1, further comprising a second lifting step for fixing the dimension of the end cover engagement portion after the expanding drawing process. The method of manufacturing a motor case according to claim 5, further comprising a trimming step for removing the material in the periphery of the lower opening after the second step of lifting.


KR1020140151287A 2014-11-03 2014-11-03 Method for Manufacturing Motor Case for Fuel Injection Apparatus of Automobile KR101650248B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020140151287A KR101650248B1 (en) 2014-11-03 2014-11-03 Method for Manufacturing Motor Case for Fuel Injection Apparatus of Automobile
PCT/KR2015/011726 WO2016072716A1 (en) 2014-11-03 2015-11-03 Method of manufacturing motor case of motor for automotive fuel injection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140151287A KR101650248B1 (en) 2014-11-03 2014-11-03 Method for Manufacturing Motor Case for Fuel Injection Apparatus of Automobile

Publications (2)

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KR20160051383A true KR20160051383A (en) 2016-05-11
KR101650248B1 KR101650248B1 (en) 2016-08-23

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WO (1) WO2016072716A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11355813B2 (en) 2018-06-18 2022-06-07 Lg Energy Solution, Ltd. Venting device and method for manufacturing the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100399591B1 (en) * 2000-03-22 2003-09-26 주식회사 대흥알앤티 Method of making case of strut bearing using boards
KR101251043B1 (en) * 2012-03-30 2013-04-05 프로텍코리아 주식회사 Tap plate manufacturing method and its apparutus
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101028752B1 (en) * 2009-06-29 2011-04-14 (주)태화기업 forming method of bearing motor case
JP2013154357A (en) * 2012-01-27 2013-08-15 Tamura Seisakusho:Kk Burring device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100399591B1 (en) * 2000-03-22 2003-09-26 주식회사 대흥알앤티 Method of making case of strut bearing using boards
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
KR101251043B1 (en) * 2012-03-30 2013-04-05 프로텍코리아 주식회사 Tap plate manufacturing method and its apparutus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11355813B2 (en) 2018-06-18 2022-06-07 Lg Energy Solution, Ltd. Venting device and method for manufacturing the same
US11881591B2 (en) 2018-06-18 2024-01-23 Lg Energy Solution, Ltd. Venting device and method for manufacturing the same

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Publication number Publication date
KR101650248B1 (en) 2016-08-23
WO2016072716A1 (en) 2016-05-12

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