KR20150022512A - Automotive front lower arm manufacture method - Google Patents

Automotive front lower arm manufacture method Download PDF

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Publication number
KR20150022512A
KR20150022512A KR20130100510A KR20130100510A KR20150022512A KR 20150022512 A KR20150022512 A KR 20150022512A KR 20130100510 A KR20130100510 A KR 20130100510A KR 20130100510 A KR20130100510 A KR 20130100510A KR 20150022512 A KR20150022512 A KR 20150022512A
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KR
South Korea
Prior art keywords
front lower
lower arm
mold
bush hole
arm
Prior art date
Application number
KR20130100510A
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Korean (ko)
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KR101537853B1 (en
Inventor
허인태
Original Assignee
주식회사 새해성
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Priority to KR1020130100510A priority Critical patent/KR101537853B1/en
Publication of KR20150022512A publication Critical patent/KR20150022512A/en
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Publication of KR101537853B1 publication Critical patent/KR101537853B1/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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for 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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • 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
    • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/003—Simultaneous forming, e.g. making more than one part per stroke

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

The present invention relates to a method of manufacturing a front lower arm of an automobile, in which a front lower arm is blanked so that two front lower arms can be formed at the same time, and a blanking line of the front lower arm is formed as an outer line of a front lower arm. I want to mold the mold so that it does not move.
Two front lower arm materials are formed to be connected to each other by a connecting piece on the side of the bushing on the vehicle body side and a front lower arm material in which guide guide grooves are formed on the wheel side bush hole of the front lower arm, The guide grooves formed in the front lower arm material are combined so that the front lower arm material is not pushed to either side and the uniform lower end According to the present invention, since the front lower arm is not moved through the mold and two front lower arms are formed at the same time, the front lower arm having a uniform thickness and excellent in quality can be manufactured. And the blanking line of the front lower arm material is the front side, which is an outer line of the arm. Since in the LOS (loss) of the metal sheet increases productivity without occur has the effect of reducing the manufacturing costs.

Figure P1020130100510

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an automotive front lower arm manufacturing method,

The present invention relates to a method of manufacturing a front lower arm of an automobile. More particularly, the present invention relates to a method of manufacturing a front lower arm of a vehicle, in which a front lower arm is blanked so that two front lower arms can be simultaneously formed, The present invention relates to a method of manufacturing a front lower arm of an automobile which is formed so as not to move in a mold so as to be an outline line.

As is known, the front lower arm of a vehicle is configured in various forms according to the type of the vehicle, and the front lower arm is installed movably on the vehicle body side and the wheel side, so that the differential vehicle acts to absorb vibrations and shocks on the road surface when traveling .

In the conventional method of manufacturing a front lower arm, a front plate is blanked so that one arm can be formed by a front plate, and a front lower arm is prepared by blanking the front front lower arm larger than the developed front lower arm. Side bush hole 101 and the wheel-side bush hole 102 are formed by punching in the process of molding through the sixth-order mold at various stages. In the sixth-order mold, after forming the front lower arm, the remaining front lower arm 100 The outer line 103 on the wheel side bush hole side is cut off.

The reason why the front lower arm material is blanked larger than the expanded size of the real front lower arm as described above is that in the method of forming the front lower arm one by one, in order to form the initial shape of the front lower arm, Because the front lower arm material is forced to move when molding, it is blanked in size considering this.

Side front bush hole and the wheel side bush hole in the process of preparing the front lower arm material larger than the developed size of the actual front lower arm as described above and performing the various stages of molding through the first through fifth molds There is a disadvantage in that the distance A between the vehicle body side bushhole and the outer line is varied and the quality of the front lower arm deteriorates.

Further, loss of the metal plate occurs due to the fact that the front lower arm is blanked to a larger size than the actual front lower arm size, and the front lower arm is formed and then the final trim (TRIM) is performed. .

Particularly, since the outer line of the wheel side bush hole is inevitably cut off at the formed angle of the front lower arm in the final trim (TRIM) step after forming the front lower arm, the front lower arm is handled by the sharp portion There is a disadvantage in causing a safety accident that damages the skin of the operator's fingers, arms, etc. (refer to FIG. 1).

In order to solve the disadvantages of the above-mentioned safety accident, there is a problem in the manufacturing method of the front lower arm such that the sharp part of the outline of the wheel side bush hole has to be trimmed and dulled.

Korean Patent No. 10-0482055 discloses a lower arm of an automotive suspension device which is formed by butt welding an upper vertical wall and a lower vertical wall of a lower panel and a lower panel, A lower arm of a structure in which a cylindrical portion is formed is disclosed. However, this invention is not related to the present invention.

Prior Art Patent Laid-Open No. 10-2003-0003633, the lower arm structure of an automobile relates to a structure in which a damping force is generated in a lower arm used in a suspension device to improve vibration and impact absorption performance, none.

Prior Art Patent No. 10-2006-0021965 relates to a method for manufacturing an aluminum lower arm for automobiles and a method for manufacturing a new aluminum lowering arm which is inexpensive and has a physical property comparable to that of a conventional aluminum forging low arm, And is not related to the present invention.

Patent Document 001: Korean Patent No. 10-0482055 (registered on Mar. 31, 2005) Patent Document 002: Korean Patent Laid-Open No. 10-2003-0003533 (published Jan. 10, 2003) Patent Document 003: Korean Patent Publication No. 10-2006-0021965 (published on Mar. 09, 2006)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a method of manufacturing a front lower arm, which is capable of minimizing loss of a metal plate by forming a front- Cost savings,

Particularly, the edge of the outer line on the wheel side bush hole is U-shaped and bent downward, so that the cut surface is sharpened by the conventional trim, thereby solving the problem of damaging the skin such as fingers and arms and improving the quality of the front lower arm The present invention has been made in view of the above problems.

According to another aspect of the present invention, there is provided a method of manufacturing a front lower arm of a vehicle, the front lower arm having the same shape as a developed shape of the front lower arm (a blanking line is an outline line of a front lower arm) Preparing a front lower arm material in which two material are formed to be connected to the vehicle body side bush hole by a connecting piece and in which a guide groove is formed at the wheel side bush hole position of the front lower arm;

The front lower arm is provided with first to fifth upper and lower molds so that two front lower arms can be simultaneously formed through a mold. A guide pin is formed on the first lower mold to form guide grooves Is combined with the front lower arm so that the front lower arm material is molded to a uniform thickness at an accurate position without being pushed to either side.

According to the present invention, since the front lower arm is not moved through the metal mold and two front lower arms are formed at the same time, the front lower arm having uniform thickness and excellent quality is provided.

As a result of the blanking line of the front lower arm material being the outer line of the front lower arm, loss of the metal plate is not caused and the productivity is improved,

In particular, since the blanking line of the front lower arm material is the outer line of the front lower arm, the end of the outer line of the wheel side bush hole is U-shaped and is bent downwardly so that the quality Thereby providing an excellent front lower arm.

1 is an enlarged cross-sectional view of a lower portion of a lower arm manufactured by a conventional front lower arm manufacturing method
Fig. 2 is a perspective view showing two front-rear arm materials for realizing the method of manufacturing a front lower arm according to the present invention. Fig.
Fig. 3 is a perspective view showing a state where two front lower arms are formed by the manufacturing method of the present invention,
Fig. 4 is a cross-sectional view showing the enlargement of the recess of the front lower arm by the manufacturing method of the present invention
Figs. 5 and 6 are diagrams showing examples of first to fifth molds for realizing the manufacturing method of the present invention
FIG. 7 is a view showing an example of a step of molding two front lower arms by the manufacturing method of the present invention
8A shows a state before the hole is drilled in the front lower arm, and B shows a state in which the hole is opened.
9A shows a state before a cylindrical portion is formed, and B shows a sectional view in a state in which a cylindrical portion is formed

A method of manufacturing a front lower arm of an automobile according to the present invention will be described in detail with reference to the drawings.

The method for manufacturing a front lower arm of an automobile according to the present invention is roughly classified into a front lower arm preparation step, a mold preparation step for forming a front lower arm, and a molding step for forming a front lower arm material through a mold.

First, the front lower arm material preparing step

Preparing a front lower arm material (1) in a shape in which two front lower arms are developed by blanking a metal plate as shown in FIG. 2 of the accompanying drawings;

In this step, the body side bush hole 2 of the front lower arm material 1 is connected by the connecting piece 3 so as to face each other, and the guide guide groove 5 is formed at the position of the wheel side bush hole 4, The front lower arm material 1 is prepared.

Mold preparation step for molding front lower arm:

The front lower arm material 1 prepared as described above is composed of first to fifth-order upper and lower molds for five-step molding.

The primary and the lower molds 10 and 11 include a primary upper mold 10 and an inner molding section 11 'in which an out molding section 10' is formed on both sides so that two front lower arms can be simultaneously formed, When the front lower arm material 1 is molded into the shape of the primary front lower arm 1a, the front lower arm material 1 is not pushed to any one side, The guide pin 12 is formed on the inner forming part 11 'of the primary lower mold 11 so that the guide guide groove 5 formed in the front lower arm material 1 can be engaged so that the guide guide groove 5 can be formed at the position,

The punch 13 'and the punch hole 14' are formed in such a manner that a hole 52 can be formed at a predetermined position of the front lower arm 51, Respectively,

The upper mold 15 and the lower mold 15 and 16 are formed by a lower mold 16 having an upper mold 15 and a lower mold 16, Wherein the arm material (1) is configured to be shaped more closely into a front-lowered arm-finished shape,

The punch device 50 for punching the bush hole 2 on the vehicle body side of the front lower arm is provided on the left and right sides of the fourth and fifth molds 17 and 18 and the upper and lower molds 17 and 18 Is provided with a punch hole 17 'and a punch 18' for punching the wheel side bush hole 4. The punch hole 17 'and the punch 18' The operation structure is general and a detailed description is omitted.

The fifth and sixth molds 19 and 20 are constructed such that a dice hole 19 'and a die punch 20' are formed in the wheel side bush hole 4 of the front lower arm to form a cylindrical portion 4 ' And the operation structure of the die hole and the die punch is the same as that of a generally used dice device, so that a detailed description thereof is omitted.

Molding the front lower arm material through a mold;

As shown in Fig. 2, the metal plate material is connected to the body side bush hole by the connecting piece 3 in a shape in which two front lower arms are developed by blanking, and a guide guide groove 5 is formed at the wheel side bush hole position The prepared front lower arm material (1)

The front lower arm material 1 is placed on the primary lower mold 11 formed with the inner forming portion 11 'so that the front lower arm material 1 can be molded at an accurate position without being pushed by either one. Coupling the guide groove 5 to the guide pin 12 formed on the inner forming part 11 ';

The front lower arm material 1 is formed into the shape of the first front lower arm 1a by the lower mold 11 having the inner forming part 11 'and the upper mold 10 having the out molding part 10' ;

Since the guide guide groove 5 formed at the wheel side bush hole is coupled to the guide pin 12 in the above step, the front lower arm material 1 can be molded in a uniform thickness at the correct position without being pushed to one side It is.

Holes 52 are formed at predetermined positions of the front lower arm by the punches 13 'and the punch holes 14' of the secondary upper and lower molds 13 and 14, The front lower arm material 1 is further formed into the shape of the front lower arm by the molds 15 and 16.

Side bush holes 2 of the front lower arm are punched by the punch device 50 on the right and left sides of the fourth lower mold 18 and the wheel side bush holes 2 are formed in the upper and lower molds 17, Side bush hole 4 is pierced by the punch hole 17 and the punch 18 for piercing the wheel-side bush hole 4.

Next, a cylindrical portion 4 'is formed in the wheel side bush hole 4 of the front lower arm by the dice hole 19' of the fifth and upper molds 19 and 20 and the die punch 20 ' And two front lower arms are manufactured at the same time, and the end 4 "of the outer line of the wheel side bush hole 4 of the front lower arm is U-shaped and formed in the downward direction.

1: front lower arm material 2: body side bush hole
3: Connecting piece 4: Wheel side bush hole
5: guide guide grooves 10 and 11: primary and lower molds
12: guide pin 51: front lower arm

Claims (1)

The metal plate is cut by the blanking into the unfolded shape of the front lower arm and is formed in several steps through the metal mold in the process of punching forming the body side bush hole and the wheel side bush hole of the front lower arm, In the front lower arm manufacturing method,
The front lower arm of the front lower arm is connected to each other by a connecting piece, and the front lower arm position of the front lower arm is connected to the wheel side bush hole position of the front lower arm Preparing a front lower arm material so that a guide guide groove is formed in the front lower arm material;
A front lower arm material is inserted between a lower mold having an inner forming part formed on both sides thereof and an upper mold having an out molding part so that two front lower arms can be simultaneously formed by the front lower arm material, And forming a guide guide groove formed in the front lower arm so that the front lower arm can be formed into a front lower arm of a certain thickness at an accurate position without being pushed to either side by being engaged with a guide pin formed in the lower mold Wherein the front lower arm of the automotive vehicle is made of a synthetic resin.
KR1020130100510A 2013-08-23 2013-08-23 Automotive front lower arm manufacture method KR101537853B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109848310A (en) * 2019-03-07 2019-06-07 武汉神风模具制造有限公司 Mount holder mold and its mount holder
CN111390023A (en) * 2020-06-04 2020-07-10 宁波甬龙机械有限公司 A automatic mould for producing installing support before right

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002192261A (en) * 2000-12-22 2002-07-10 F Tech:Kk Link arm for suspension of vehicle and its manufacturing method
KR20090132701A (en) * 2008-06-23 2009-12-31 한국산업기술대학교산학협력단 Progressive forming method for automotive seat bracket
IT1390790B1 (en) * 2008-07-11 2011-10-19 Tiberina Solutions S R L METHOD FOR MOLDING AN ARM FOR AUTOMOTIVE SUSPENSIONS
JP5654747B2 (en) * 2009-12-15 2015-01-14 株式会社ミツバ Method for manufacturing link member

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109848310A (en) * 2019-03-07 2019-06-07 武汉神风模具制造有限公司 Mount holder mold and its mount holder
CN109848310B (en) * 2019-03-07 2024-04-16 武汉神风模具制造有限公司 Bottom plate support die and bottom plate support thereof
CN111390023A (en) * 2020-06-04 2020-07-10 宁波甬龙机械有限公司 A automatic mould for producing installing support before right

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