WO2010004414A2 - Method for stamping an arm for car suspensions - Google Patents

Method for stamping an arm for car suspensions Download PDF

Info

Publication number
WO2010004414A2
WO2010004414A2 PCT/IB2009/006198 IB2009006198W WO2010004414A2 WO 2010004414 A2 WO2010004414 A2 WO 2010004414A2 IB 2009006198 W IB2009006198 W IB 2009006198W WO 2010004414 A2 WO2010004414 A2 WO 2010004414A2
Authority
WO
WIPO (PCT)
Prior art keywords
bending
blank
arm
bending angle
following step
Prior art date
Application number
PCT/IB2009/006198
Other languages
French (fr)
Other versions
WO2010004414A3 (en
Inventor
Lorenzo Castori
Original Assignee
Tiberina Solutions S.R.L.
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 Tiberina Solutions S.R.L. filed Critical Tiberina Solutions S.R.L.
Priority to AT09785997T priority Critical patent/ATE541655T1/en
Priority to EP09785997A priority patent/EP2326520B1/en
Publication of WO2010004414A2 publication Critical patent/WO2010004414A2/en
Publication of WO2010004414A3 publication Critical patent/WO2010004414A3/en

Links

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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/001—Suspension arms, e.g. constructional features
    • 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
    • B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
    • B23P2700/14—Suspension elements of automobile vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/10—Constructional features of arms
    • B60G2206/122—Constructional features of arms the arm having L-shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8102—Shaping by stamping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/82—Joining
    • B60G2206/8201—Joining by welding

Definitions

  • the present invention relates to a method for stamping an arm for car suspensions.
  • the known method of the type described above has some drawbacks mainly owing to the fact that the arm is defined by two blanks, and is thus relatively heavy and expensive, it involves the use of said containment matrices and the two blanks must be welded, which is a complex and expensive process.
  • figure 1 is a first perspective view of a preferred embodiment of the arm for car suspensions according to the present invention
  • figure 2 is a second perspective view of the arm of figure 1
  • figure 3 is a schematic diagram of a sequence of steps in order to produce the arm of figures 1 and 2
  • figure 4 is a cross-section along the line IV-IV of figure 3g
  • - figure 5 is a cross-section along the line V-V of figure 3g
  • figure 6 is a cross-section along the line VI-VI of figure 3h
  • figure 7 is a cross-section along the line VII-VII of figure 3h.
  • FIG. 1 designated as a whole by number 1 is an arm for car suspensions, which is formed in one piece, has an arched shape, and is stamped in a press (not illustrated) starting from a flat plate 2 (figure 3a) , which is substantially rectangular in shape, and is made, in this case, of 3 millimetre-thick hot-rolled UHSS Multiphase steel manufactured and sold by ArcelorMittal under product code number M800HY.
  • two successive blanking operations are performed to detach two blanks 3 from the plate 2, each one of which is limited, in its initial shape, by two largest sides 3a and 3b which are substantially flat and parallel to each other, and is stamped to define a relative arm 1.
  • each blank 3 is drawn starting from its side 3a, with a first given bending radius, and in correspondence with a central portion 4 thereof limited externally by a peripheral edge 5 extending around said portion 4, an end portion 6 of the edge 5, and an intermediate portion 7 of said edge 5 (figure 3d) .
  • the portions 4, 6 and 7 of the edge 5 are drawn again with a second bending radius smaller than the first bending radius; the portion 4 is drilled to carry out a plurality of functional holes 8 (in this case four holes 8) ; and the edge 5 is drilled in correspondence with an end portion thereof 9 opposite to the portion 6 to carry out a hole 10 suitable for coupling, in use, with a first bush (not illustrated) .
  • the edge 5 comprises a portion 11 extending between the portion 7 and the hole 10, a portion 12 extending between the portions 6 and 7, and a portion 13 extending between the portion 6 and the hole 10 on the opposite side of the portions 11 and 12 with respect to the portion 4 (figure 3e) .
  • a first part 11a of the portion 11 and the portion 13 are bent without a containment matrix starting from the relative first bent shapes, below the blank 3, and into relative second bent shapes, in which the part 11a and the portion 13 are placed with a second bending angle different from 0° with respect to relative reference planes P2 , P3 which are substantially orthogonal to the plane Pl.
  • the part 11a and the portion 13 are bent again without a containment matrix starting from the relative second bent shapes, below the blank 3, and into relative third bent shapes, in which the part 11a and the portion 13 are placed according to a third bending angle different from 0° and greater than the second bending angle with respect to the relative planes P2, P3.
  • the portion 12 and a second part lib of the portion 11 adjacent to the part 11a define, in the relative first bent shapes, a seat 16 (figures 1 and 2), in the form of an arc of a circle, and suitable for coupling, in use, with a second bush (not illustrated) .
  • a ninth step the portion 6 is bent in a reference plane P4 placed according to an angle different from 0° with respect to the plane Pl; and the portion 7 is drilled in order to carry out a hole 17 defining, in use, a reference hole for controlling the arm 1 mounting interaxes .
  • the blank 3 is placed with the plane P4 substantially horizontal; and the portion 6 is drilled to carry out a hole 18 suitable for coupling, in use, with a joint (not illustrated) .
  • the edge of the hole 18 is taken off, i.e. it is provided with an annular collar 19 which protrudes from the side 3b.
  • the hole 18 and the collar 19 are gauged to achieve the tolerance required for coupling with said joint (not illustrated) .
  • the seat 16 is machined to remove the chippings in order to obtain the shape and tolerance required for coupling with said second bush (not illustrated) .

Abstract

Method for stamping an arm for car suspensions, wherein the arm is obtained starting from a flat plate blank (2) which is drawn in correspondence with a central portion thereof (4) surrounded by a peripheral edge (5), which is drawn in correspondence with a first portion thereof (7) for coupling with a first bush, is drawn and drilled in correspondence with a second portion thereof (6) for coupling with a joint, and is drilled in correspondence with a third portion thereof (9) for coupling with a second bush.

Description

"METHOD FOR STAMPING AN ARM FOR CAR SUSPENSIONS"
TECHNICAL FIELD
The present invention relates to a method for stamping an arm for car suspensions. BACKGROUND ART
In the automobile sector, a prior art arm for car suspensions is manufactured by means of a method comprising the following steps:
• detaching two shaped blanks from a substantially flat plate; bending each blank so as to define a relative concave central portion limited by a relative peripheral edge ; bending a first portion of the peripheral edge of each blank around a first containment matrix; drilling a second and a third portion of the peripheral edge of each blank in order to carry out a first and, respectively, a second coupling hole,- bending a fourth portion of the peripheral edge of each blank around a second containment matrix and in a reference plane placed according to an angle of substantially 90° with respect to a containment plane of said blank; and welding the two blanks together along the fourth portion in order to obtain the arm and so that the relative first portions define a seat for coupling with a first bush, the relative first holes define a seat for coupling with a second bush, and the relative third holes define a seat for coupling with a joint.
The known method of the type described above has some drawbacks mainly owing to the fact that the arm is defined by two blanks, and is thus relatively heavy and expensive, it involves the use of said containment matrices and the two blanks must be welded, which is a complex and expensive process.
DISCLOSURE OF INVENTION
It is an object of the present invention to provide a method for stamping an arm for car suspensions that overcomes the drawbacks described above and is simple and inexpensive to implement.
According to the present invention there is provided a method for stamping an arm for car suspensions as set forth in the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will now be described with reference to the accompanying drawings, illustrating a non- limiting embodiment thereof, in which: figure 1 is a first perspective view of a preferred embodiment of the arm for car suspensions according to the present invention; figure 2 is a second perspective view of the arm of figure 1; figure 3 is a schematic diagram of a sequence of steps in order to produce the arm of figures 1 and 2; figure 4 is a cross-section along the line IV-IV of figure 3g,- figure 5 is a cross-section along the line V-V of figure 3g; figure 6 is a cross-section along the line VI-VI of figure 3h; and figure 7 is a cross-section along the line VII-VII of figure 3h.
BEST MODE FOR CARRYING OUT THE INVENTION With reference to figures 1 and 2, designated as a whole by number 1 is an arm for car suspensions, which is formed in one piece, has an arched shape, and is stamped in a press (not illustrated) starting from a flat plate 2 (figure 3a) , which is substantially rectangular in shape, and is made, in this case, of 3 millimetre-thick hot-rolled UHSS Multiphase steel manufactured and sold by ArcelorMittal under product code number M800HY.
As illustrated in figures 3b and 3c, two successive blanking operations are performed to detach two blanks 3 from the plate 2, each one of which is limited, in its initial shape, by two largest sides 3a and 3b which are substantially flat and parallel to each other, and is stamped to define a relative arm 1.
In a third step, each blank 3 is drawn starting from its side 3a, with a first given bending radius, and in correspondence with a central portion 4 thereof limited externally by a peripheral edge 5 extending around said portion 4, an end portion 6 of the edge 5, and an intermediate portion 7 of said edge 5 (figure 3d) .
According to that illustrated in figure 3e, in a fourth step, the portions 4, 6 and 7 of the edge 5 are drawn again with a second bending radius smaller than the first bending radius; the portion 4 is drilled to carry out a plurality of functional holes 8 (in this case four holes 8) ; and the edge 5 is drilled in correspondence with an end portion thereof 9 opposite to the portion 6 to carry out a hole 10 suitable for coupling, in use, with a first bush (not illustrated) . After completing the process of drawing the portions 4, 6, and 7 and drilling the portion 9, the edge 5 comprises a portion 11 extending between the portion 7 and the hole 10, a portion 12 extending between the portions 6 and 7, and a portion 13 extending between the portion 6 and the hole 10 on the opposite side of the portions 11 and 12 with respect to the portion 4 (figure 3e) .
With reference to figures 2 and 3f, in a fifth step, the edge of the hole 10 and of one of the holes 8
(hereinafter designated by 8a) is taken off, i.e. these are provided with respective annular collars 14, 15 which protrude from the side 3b; and, in a sixth step, the portions 11, 12, 13 of the edge 5 are bent into relative first bent configurations, in which the portions 11, 12, and 13 are placed according to a first bending angle of substantially 90° with respect to a reference plane Pl (figure 4) parallel to the sides 3a, 3b.
According to that illustrated in figures 2, 3g, 4, and 5, in a seventh step, a first part 11a of the portion 11 and the portion 13 are bent without a containment matrix starting from the relative first bent shapes, below the blank 3, and into relative second bent shapes, in which the part 11a and the portion 13 are placed with a second bending angle different from 0° with respect to relative reference planes P2 , P3 which are substantially orthogonal to the plane Pl.
With reference to figures 2, 3h, 6, and 7, in an eighth step, the part 11a and the portion 13 are bent again without a containment matrix starting from the relative second bent shapes, below the blank 3, and into relative third bent shapes, in which the part 11a and the portion 13 are placed according to a third bending angle different from 0° and greater than the second bending angle with respect to the relative planes P2, P3. With regard to the above description, it should be noted that the portion 12 and a second part lib of the portion 11 adjacent to the part 11a define, in the relative first bent shapes, a seat 16 (figures 1 and 2), in the form of an arc of a circle, and suitable for coupling, in use, with a second bush (not illustrated) .
With reference to figures 1, 2, and 3i, in a ninth step, the portion 6 is bent in a reference plane P4 placed according to an angle different from 0° with respect to the plane Pl; and the portion 7 is drilled in order to carry out a hole 17 defining, in use, a reference hole for controlling the arm 1 mounting interaxes .
In a tenth step, the blank 3 is placed with the plane P4 substantially horizontal; and the portion 6 is drilled to carry out a hole 18 suitable for coupling, in use, with a joint (not illustrated) .
In an eleventh step, the edge of the hole 18 is taken off, i.e. it is provided with an annular collar 19 which protrudes from the side 3b. In a twelfth step, the hole 18 and the collar 19 are gauged to achieve the tolerance required for coupling with said joint (not illustrated) .
Finally, in a thirteenth step, the seat 16 is machined to remove the chippings in order to obtain the shape and tolerance required for coupling with said second bush (not illustrated) .
Using the method described above it is thus possible to obtain a monocoque arm 1, which is box- shaped and requires no additional welding operations after the stamping process.

Claims

1. Method for stamping an arm for car suspensions starting from a substantially flat plate (2) , said method being characterized in that it comprises the following steps:
- detaching a shaped blank (3) from the plate (2) , said blank (3) being limited, in its initial shape, by two sides (3a, 3b) which are substantially flat and parallel to each other;
- drawing a central portion (4) of the blank (3) limited by a peripheral edge (5) of the blank (3) itself;
- drawing a first portion (7) of the peripheral edge (5) for coupling with a first bush;
- drawing a second portion (6) of the peripheral edge (5) for coupling with a joint;
- drilling a third portion (9) of the peripheral edge (5) in order to carry out a first coupling hole (10) with a second bush;
- bending a fourth portion (11, 12, 13) of the peripheral edge (5) according to a first bending angle of substantially 90° with respect to a first reference plane (Pl) substantially parallel to said sides (3a, 3b) ; - bending without a containment matrix at least a part (11a, 13) of said fourth portion (11, 12, 13) below the blank (3) starting from the first bending angle, and with a second bending angle different from 0° with respect to at least a second reference plane (P2, P3) which is substantially orthogonal to the first reference plane (Pl) ; and
- drilling said second portion (6) in order to carry out a second coupling hole (18) with said joint.
2. Method according to claim 1, further comprising the following step: bending said second portion (6) in a third reference plane (P4) placed according to an angle different from 0° with respect to the first reference plane (Pl) .
3. Method according to claim 2, further comprising the following step:
- horizontally orienting said third reference plane (P4) before drilling said second hole (18) .
4. Method according to one of the preceding claims, wherein the central portion (4) and said first and second portion (7, 6) are drawn in a first drawing step with a first bending radius and in a second drawing step with a second bending radius smaller than the first one.
5. Method according to one of the preceding claims, further comprising the following step:
- drilling the central portion (4) for carrying out a plurality of third holes (8) .
6. Method according to claim 5, further comprising the following step:
- taking off the edge of said first and second holes (10, 18) and at least part (8a) of said third holes (8) .
7. Method according to one of the preceding claims, comprising the following steps:
- bending without a containment matrix said part (11a, 13) below the blank (3) starting from the first bending angle and with said second bending angle; and
bending without a containment matrix said part (11a, 13) below the blank (3) starting from the second bending angle and with a third bending angle larger than the second bending angle .
8. Method according to one of the preceding claims, further comprising the following step:
gauging said second hole (18) by means of a chipping machining.
9. Method according to one of the preceding claims, further comprising the following step:
- drilling said first portion (7) in order to carry out a fourth hole (17) defining, in use, a reference hole for controlling the arm mounting interaxes .
10. Method according to one of the preceding claims, wherein the first portion (7) defines, together with a further part (lib, 12) of the fourth portion (11, 12, 13) placed according to the first bending angle, a seat (16) for said first bush, said method further comprising the following step:
- finishing the seat (16) by means of a chipping machining.
11. Method according to one of the preceding claims, wherein the arm is made with only one said blank (3) .
12. Monocoque arm for car suspensions carried out according to the method claimed in one of the preceding claims .
PCT/IB2009/006198 2008-07-11 2009-07-09 Method for stamping an arm for car suspensions WO2010004414A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT09785997T ATE541655T1 (en) 2008-07-11 2009-07-09 METHOD FOR STAMPING AN ARM FOR MOTOR VEHICLE SUSPENSIONS
EP09785997A EP2326520B1 (en) 2008-07-11 2009-07-09 Method for stamping an arm for car suspensions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO2008A000435 2008-07-11
ITBO2008A000435A IT1390790B1 (en) 2008-07-11 2008-07-11 METHOD FOR MOLDING AN ARM FOR AUTOMOTIVE SUSPENSIONS

Publications (2)

Publication Number Publication Date
WO2010004414A2 true WO2010004414A2 (en) 2010-01-14
WO2010004414A3 WO2010004414A3 (en) 2010-06-03

Family

ID=40793157

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/006198 WO2010004414A2 (en) 2008-07-11 2009-07-09 Method for stamping an arm for car suspensions

Country Status (4)

Country Link
EP (1) EP2326520B1 (en)
AT (1) ATE541655T1 (en)
IT (1) IT1390790B1 (en)
WO (1) WO2010004414A2 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
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CN102350617A (en) * 2011-09-08 2012-02-15 中国航空工业第六一八研究所 Method for processing high-accuracy easily-deformable U-shaped cantilever structural member
WO2012123477A1 (en) * 2011-03-17 2012-09-20 Kirchhoff Automotive Deutschland Gmbh Suspension arm for a vehicle wheel suspension system
WO2013113591A1 (en) * 2012-01-30 2013-08-08 Gmf Umformtechnik Gmbh Single-shell spring arm
KR101537853B1 (en) * 2013-08-23 2015-07-21 주식회사 새해성 Automotive front lower arm manufacture method
EP2918430A1 (en) * 2014-03-12 2015-09-16 Autotech Engineering Deutschland GmbH Suspension arm for a motor vehicle
EP2927029A1 (en) * 2014-04-02 2015-10-07 Autotech Engineering Deutschland GmbH Method for producing a suspension arm
EP2987665A1 (en) * 2014-08-12 2016-02-24 Tiberina Solutions S.R.L. Method for stamping an arm for vehicle suspensions and such an arm
EP3115234A1 (en) * 2015-07-08 2017-01-11 Coskunoz Kalip Makina Sanayi ve Ticaret A.S. A control arm
CN107128140A (en) * 2017-05-10 2017-09-05 荆州荆福汽车零部件有限公司 A kind of punching type automotive suspension control arm assembly and production method
CN109128696A (en) * 2018-08-07 2019-01-04 宁海万兴金属制品有限公司 A kind of auto parts structure and its production technology
WO2019226138A3 (en) * 2018-02-09 2020-01-02 Coşkunöz Kalip Maki̇na Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Strengthened control arm and production method thereof

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CN102489940B (en) * 2011-11-26 2013-07-31 中国重汽集团济南动力有限公司 Machining process of front overhang combined cast of truck

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JP2002337525A (en) * 2001-05-17 2002-11-27 F Tech:Kk Suspension arm for vehicle
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EP1125774A2 (en) * 2000-02-17 2001-08-22 Benteler Ag Motor vehicle suspension components
JP2002337525A (en) * 2001-05-17 2002-11-27 F Tech:Kk Suspension arm for vehicle
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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012123477A1 (en) * 2011-03-17 2012-09-20 Kirchhoff Automotive Deutschland Gmbh Suspension arm for a vehicle wheel suspension system
CN102350617A (en) * 2011-09-08 2012-02-15 中国航空工业第六一八研究所 Method for processing high-accuracy easily-deformable U-shaped cantilever structural member
EP2809531B1 (en) 2012-01-30 2016-08-10 Gestamp Umformtechnik GmbH Single shell spring link
WO2013113591A1 (en) * 2012-01-30 2013-08-08 Gmf Umformtechnik Gmbh Single-shell spring arm
CN104203607A (en) * 2012-01-30 2014-12-10 海斯坦普金属成型有限责任公司 Single-shell spring arm
US9090138B2 (en) 2012-01-30 2015-07-28 Gestamp Umformtechnik Gmbh Single-shell spring arm
CN104203607B (en) * 2012-01-30 2016-08-24 海斯坦普金属成型有限责任公司 One-shell suspension arm
KR101537853B1 (en) * 2013-08-23 2015-07-21 주식회사 새해성 Automotive front lower arm manufacture method
EP2918430A1 (en) * 2014-03-12 2015-09-16 Autotech Engineering Deutschland GmbH Suspension arm for a motor vehicle
CN104908542A (en) * 2014-03-12 2015-09-16 德国汽车工程技术有限公司 Chassis Link for a Motor Vehicle
US9561699B2 (en) 2014-03-12 2017-02-07 Autotech Engineering Deutschland GmbH Chassis link for a motor vehicle
CN104972856B (en) * 2014-04-02 2017-08-01 德国汽车工程技术有限公司 Method for manufacturing automobile chassis guide arm
CN104972856A (en) * 2014-04-02 2015-10-14 德国汽车工程技术有限公司 Method For Producing A Chassis Link
EP2927029A1 (en) * 2014-04-02 2015-10-07 Autotech Engineering Deutschland GmbH Method for producing a suspension arm
US10081044B2 (en) 2014-04-02 2018-09-25 Autotech Engineering Deutschland GmbH Method for producing a chassis link
EP2987665A1 (en) * 2014-08-12 2016-02-24 Tiberina Solutions S.R.L. Method for stamping an arm for vehicle suspensions and such an arm
EP3115234A1 (en) * 2015-07-08 2017-01-11 Coskunoz Kalip Makina Sanayi ve Ticaret A.S. A control arm
CN107128140A (en) * 2017-05-10 2017-09-05 荆州荆福汽车零部件有限公司 A kind of punching type automotive suspension control arm assembly and production method
WO2019226138A3 (en) * 2018-02-09 2020-01-02 Coşkunöz Kalip Maki̇na Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Strengthened control arm and production method thereof
CN109128696A (en) * 2018-08-07 2019-01-04 宁海万兴金属制品有限公司 A kind of auto parts structure and its production technology

Also Published As

Publication number Publication date
EP2326520B1 (en) 2012-01-18
WO2010004414A3 (en) 2010-06-03
EP2326520A2 (en) 2011-06-01
ITBO20080435A1 (en) 2010-01-12
IT1390790B1 (en) 2011-10-19
ATE541655T1 (en) 2012-02-15

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