WO2019226138A2 - Strengthened control arm and production method thereof - Google Patents

Strengthened control arm and production method thereof Download PDF

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Publication number
WO2019226138A2
WO2019226138A2 PCT/TR2019/050079 TR2019050079W WO2019226138A2 WO 2019226138 A2 WO2019226138 A2 WO 2019226138A2 TR 2019050079 W TR2019050079 W TR 2019050079W WO 2019226138 A2 WO2019226138 A2 WO 2019226138A2
Authority
WO
WIPO (PCT)
Prior art keywords
metal sheet
crushing
control arm
crushed
blanking
Prior art date
Application number
PCT/TR2019/050079
Other languages
French (fr)
Other versions
WO2019226138A3 (en
Inventor
Alperen Bayram
Merve Çibik
Original Assignee
Coşkunöz Kalip Maki̇na Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇
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 Coşkunöz Kalip Maki̇na Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ filed Critical Coşkunöz Kalip Maki̇na Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇
Publication of WO2019226138A2 publication Critical patent/WO2019226138A2/en
Publication of WO2019226138A3 publication Critical patent/WO2019226138A3/en

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Classifications

    • 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
    • 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
    • B60G2206/70—Materials used in suspensions
    • B60G2206/72—Steel

Definitions

  • the invention is related to a strengthened control arm used in the suspension systems of the vehicles and a production method for obtaining this control arm.
  • the invention is particularly related to a control arm which comprises sections formed by crushing process in mould in order to enable increase in strength and the production method thereof.
  • the control arm is one of the suspension parts which is connected to the vehicle chassis from its two points and to the wheel from it’s one point.
  • the control arm moves harmoniously with the wheels of the vehicles. Therefore during the movement of the vehicles, the forces occurred in connection with the road conditions are fading on the control arm. It is required that the control arm shall be durable against static weights with predetermined size according to the type of the vehicle.
  • Patent with publication No TR201516005 is related to the production method of a control arm which will prevent fatigue cracks occurred in welding areas, although it takes the usage of a higher strengthened metal sheet, it requires additional welding process.
  • Patent with publication No TR201310157 is related to the production method of a strengthened control arm in required areas by making regional process, although it takes the usage of a higher strengthened metal sheet, it requires additional thermal process.
  • Patent with publication No US20020005621 A1 requires additional sheet and welding process although it takes as the basis, increase in strength against buckling of the control arm as a suspension element for a motor vehicle.
  • Patent with publication No US20060151970A1 is related to combining the integral parts pressed locally on tubular metal sheet structure produced by hydroforming method with the welding method.
  • the present invention in order to eliminate the abovementioned disadvantages and bring new advantages to the relevant technical field, is related to the production method of a control arm which is used in the suspension systems of the vehicles and comprises sections formed by crushing in mould in order to increase its strength,.
  • the main aim of the invention is to provide increasing the strength of the control arm.
  • Another aim of the invention is to provide the production of a strengthened control arm without requiring additional material or process.
  • Another aim of the invention is to provide increasing the strength of the material with the formation of dislocations by means of the cold deformation process made by the crushing method, in the production of control arm.
  • occurrence of new dislocations contributes to increasing the strength of the material.
  • work hardening and thus strength increase is obtained.
  • the present invention in order to fulfill all aims in the abovementioned description and below detailed description, is a production method of a control arm used in the suspension system of the vehicles, characterized in that it comprised the following process steps;
  • crushed blanking metal sheet comprising a region (40) subject to crushing and formed by means of metal sheet crushing method on the blanking metal sheet
  • Figure 1 It is a general view of the control arm comprising a region subject to crushing.
  • Figure 2 It is a general view of the control arm comprising a region subject to crushing.
  • Figure 3 It is a detailed view of the crushed regions in the regions subject to crushing.
  • Figure 4 It is a detailed view of the crushed regions in the regions subject to crushing.
  • Figure 5 It is a view of the blanking metal sheet.
  • Figure 6 It is a view of the crushed blanking metal sheet.
  • the present invention is related to the production method of the control arm (10) used in the suspension systems of the vehicles.
  • Said control arm (10) production method comprises the following process steps;
  • crushed blanking metal sheet (30) comprising a region (40) subject to crushing and formed by means of metal sheet crushing method on the blanking metal sheet (20),
  • control arm (10) which comprises the region (40) subject to crushing as the subject matter of the invention.
  • the blanking metal sheet (20) is found in flat form without being formed before it is located into the mould. Blanking metal sheet (20) is formed with blanking mould under the press. The blanking metal sheet (20) is given in Figure 5.
  • Crushed blanking metal sheet (30) is obtained by applying crushing in the mould on the blanking metal sheet (20).
  • crushed blanking metal sheet (30) is a metal sheet made by crushing the blanking metal sheet (20) in the mould. Crushing/cold forming is made to the blanking metal sheet (20).
  • the strength of the blanking metal sheet (20) is increased in determined regions by making cold forming with the crushing method.
  • the strengthened regions are the regions (40) subject to crushing.
  • Crushed blanking metal sheet (30) view is given in Figure 6.
  • the region subject to crushing (40) is applied, preferably comprises 5 mm crushing ranges (d) with crushed regions (50) consisting of 5x5 mm sized square formed recesses.
  • the floor which lies between the crushed regions (50) is in protrusion (52) form.
  • the depth of crushing (the depth of crushed region (50)) is 2/3 ratio of the thickness of blanking metal sheet (20).
  • the crushing range (d) consists of the distance between two crushed regions (50).
  • the crushed regions (50) preferably have a geometric form in square shape. It is possible that the crushing range (d) can be equal to each other or different from each other, it can be in geometric form or non geometric form.
  • Said region (40) subject to crushing is obtained in a manner to comprise 5 mm crushing range (d), crushed regions (50) in square form with 5x5 mm size which are aligned side by side or subsequently.
  • control arm (10) is obtained.
  • the strengthened metal sheet (30) is shaped in a form mould of the blanking metal sheet (20) under press.
  • the control arm (10) subject to invention is obtained by forming in forming mould after crushing is made in the blanking mould of the metal sheet material.
  • first blanking metal sheet (20) is pressed (cut out of), the subsequent process in the same mould is to perform crushing process.
  • the mould used is a progressive mould. Form is given to the strengthened metal sheet (30) by making crushing in the forming mould by bending.
  • the solution is provided within the system itself.
  • additional strengthening forms are added and production is performed with this blanking metal sheet (20). Therefore, the regions on the control arm (10) that require strength are strengthened by means of these previously given forms.
  • Cold deformation process is made by crushing.
  • the strength value of the material is increased by creating dislocation with cold deformation. It is obtained by interaction of dislocations with each other and with various obstacles that makes the movement of dislocations difficult. In addition to this, during cold deformation the emergence of new dislocations contributes to this.
  • the dislocation intensity in the internal structure of the blanking metal sheet (20) which is not subjected to plastic shape change increases after the plastic shape change. As a result of interaction of dislocations with each other and with other obstacles, work hardening and therefore strength increase occurs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)

Abstract

The present invention is related to the production method of the control arm (10) used in the suspension systems of the vehicles, it comprises the following process steps; obtaining blanking metal sheet (20) by cutting the metal sheet from roller band, obtaining crushed blanking metal sheet (30) comprising a region (40) subject to crushing and formed by means of metal sheet crushing method on the blanking metal sheet (20), obtaining the control arm (10) with forming the crushed blanking metal sheet (30).

Description

STRENGTHENED CONTROL ARM AND PRODUCTION METHOD THEREOF
TECHNICAL FIELD
The invention is related to a strengthened control arm used in the suspension systems of the vehicles and a production method for obtaining this control arm.
The invention is particularly related to a control arm which comprises sections formed by crushing process in mould in order to enable increase in strength and the production method thereof.
PRIOR ART
One of the structural elements that create the vehicles is the control arm. The control arm is one of the suspension parts which is connected to the vehicle chassis from its two points and to the wheel from it’s one point. The control arm moves harmoniously with the wheels of the vehicles. Therefore during the movement of the vehicles, the forces occurred in connection with the road conditions are fading on the control arm. It is required that the control arm shall be durable against static weights with predetermined size according to the type of the vehicle.
In current systems, forged and cast control arms are used together with control arms produced from double and single layered sheet metal. Today together with the importance of lightness in the vehicle, high strength metal sheet usage increases and single layered control arms produced from high strength metal sheets are used very widely. The increase in the strength of the material brings some problems together. The main problem among them is the decrease in the ability of cold forming the product. Another problem is that; due to the increase of material costs, product costs also increase.
Local strengthening on the control arm part is proposed in order to solve these problems in present art. One of the most important among them is local thermal treatment solution. The negative effect in this solution is that process period increases due to laser or induction thermal treatment process. Another negative effect is that, in order to apply thermal treatment to the material, appropriate systems to thermal treatment are required to be used. Well known developments in the present art in terms of the subject matter are given herein below.
Patent with publication No TR201516005 is related to the production method of a control arm which will prevent fatigue cracks occurred in welding areas, although it takes the usage of a higher strengthened metal sheet, it requires additional welding process.
Patent with publication No TR201310157 is related to the production method of a strengthened control arm in required areas by making regional process, although it takes the usage of a higher strengthened metal sheet, it requires additional thermal process.
Patent with publication No US20020005621 A1 requires additional sheet and welding process although it takes as the basis, increase in strength against buckling of the control arm as a suspension element for a motor vehicle.
Patent with publication No US20060151970A1 is related to combining the integral parts pressed locally on tubular metal sheet structure produced by hydroforming method with the welding method.
As a result of the abovementioned problems that cannot be solved in the light of the prior art makes it necessary to make a development in the relevant technical field.
BRIEF DESCRIPTION OF THE INVENTION
The present invention, in order to eliminate the abovementioned disadvantages and bring new advantages to the relevant technical field, is related to the production method of a control arm which is used in the suspension systems of the vehicles and comprises sections formed by crushing in mould in order to increase its strength,.
The main aim of the invention is to provide increasing the strength of the control arm.
Another aim of the invention is to provide the production of a strengthened control arm without requiring additional material or process.
Another aim of the invention is to provide increasing the strength of the material with the formation of dislocations by means of the cold deformation process made by the crushing method, in the production of control arm. During cold deformation process, occurrence of new dislocations contributes to increasing the strength of the material. As a result of the interaction of the dislocations with increasing density both with each other and with other obstacles, work hardening and thus strength increase is obtained.
The present invention, in order to fulfill all aims in the abovementioned description and below detailed description, is a production method of a control arm used in the suspension system of the vehicles, characterized in that it comprised the following process steps;
• Obtaining blanking metal sheet by cutting the metal sheet from roller band,
• Obtaining crushed blanking metal sheet comprising a region (40) subject to crushing and formed by means of metal sheet crushing method on the blanking metal sheet,
• Obtaining the control arm with forming the crushed blanking metal sheet.
In order to understand the present invention fully with its structure and advantages with additional elements, it shall be evaluated by the following drawings with the below description.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 . It is a general view of the control arm comprising a region subject to crushing.
Figure 2. It is a general view of the control arm comprising a region subject to crushing.
Figure 3. It is a detailed view of the crushed regions in the regions subject to crushing.
Figure 4. It is a detailed view of the crushed regions in the regions subject to crushing.
Figure 5. It is a view of the blanking metal sheet.
Figure 6. It is a view of the crushed blanking metal sheet.
REFERENCE NUMBERS
10. Control arm
20. Blanking metal sheet
30. Crushed blanking metal sheet 40. Region subject to crushing
50. Crushed region
52. Protrusion
d. Crushing range
DETAILED DESCRIPTION OF THE INVENTION
In this detailed description, the novelty of the present invention is explained by examples in a manner without creating any limiting effect only for clarifying the subject matter.
The present invention is related to the production method of the control arm (10) used in the suspension systems of the vehicles. Said control arm (10) production method comprises the following process steps;
• Obtaining blanking metal sheet (20) by cutting the metal sheet from roller band,
• Obtaining crushed blanking metal sheet (30) comprising a region (40) subject to crushing and formed by means of metal sheet crushing method on the blanking metal sheet (20),
• Obtaining the control arm (10) with forming the crushed blanking metal sheet (30).
In Figure 1 and 2 general views of the control arm (10) are given, which comprises the region (40) subject to crushing as the subject matter of the invention.
After the metal sheet is cut from the roller band, a cut is made to the metal sheet similar to the blanking shape of the control arm (10). This metal sheet which is cut in this manner is called the blanking metal sheet (20). The blanking metal sheet (20) is found in flat form without being formed before it is located into the mould. Blanking metal sheet (20) is formed with blanking mould under the press. The blanking metal sheet (20) is given in Figure 5.
Crushed blanking metal sheet (30) is obtained by applying crushing in the mould on the blanking metal sheet (20). In other words crushed blanking metal sheet (30) is a metal sheet made by crushing the blanking metal sheet (20) in the mould. Crushing/cold forming is made to the blanking metal sheet (20). The strength of the blanking metal sheet (20) is increased in determined regions by making cold forming with the crushing method. The strengthened regions are the regions (40) subject to crushing. Crushed blanking metal sheet (30) view is given in Figure 6. The region subject to crushing (40) is applied, preferably comprises 5 mm crushing ranges (d) with crushed regions (50) consisting of 5x5 mm sized square formed recesses. In the region (40) subject to crushing, the floor which lies between the crushed regions (50) is in protrusion (52) form. In Figure 3 and 4, the detail views of the crushed regions (50) in the region (40) subject to crushing are given. The depth of crushing (the depth of crushed region (50)) is 2/3 ratio of the thickness of blanking metal sheet (20). The crushing range (d) consists of the distance between two crushed regions (50). The crushed regions (50) preferably have a geometric form in square shape. It is possible that the crushing range (d) can be equal to each other or different from each other, it can be in geometric form or non geometric form. Said region (40) subject to crushing is obtained in a manner to comprise 5 mm crushing range (d), crushed regions (50) in square form with 5x5 mm size which are aligned side by side or subsequently.
Together with shaping the crushed blanking metal sheet (30), control arm (10) is obtained. In determined regions, the strengthened metal sheet (30) is shaped in a form mould of the blanking metal sheet (20) under press.
The control arm (10) subject to invention is obtained by forming in forming mould after crushing is made in the blanking mould of the metal sheet material. In the blanking cutting mould under press, first blanking metal sheet (20) is pressed (cut out of), the subsequent process in the same mould is to perform crushing process. The mould used is a progressive mould. Form is given to the strengthened metal sheet (30) by making crushing in the forming mould by bending.
By means of the production method of the present invention, without requiring an additional material or process, the solution is provided within the system itself. During forming on the blanking metal sheet (20), additional strengthening forms are added and production is performed with this blanking metal sheet (20). Therefore, the regions on the control arm (10) that require strength are strengthened by means of these previously given forms.
Cold deformation process is made by crushing. The strength value of the material is increased by creating dislocation with cold deformation. It is obtained by interaction of dislocations with each other and with various obstacles that makes the movement of dislocations difficult. In addition to this, during cold deformation the emergence of new dislocations contributes to this. The dislocation intensity in the internal structure of the blanking metal sheet (20) which is not subjected to plastic shape change increases after the plastic shape change. As a result of interaction of dislocations with each other and with other obstacles, work hardening and therefore strength increase occurs.

Claims

1. A production method for the control arm (10) used in the suspension systems of the vehicles, characterized by comprising following process steps;
• obtaining blanking metal sheet (20) by cutting the metal sheet from roller band,
• obtaining crushed blanking metal sheet (30) comprising a region (40) subject to crushing and formed by means of metal sheet crushing method on the blanking metal sheet (20),
• obtaining the control arm (10) with forming the crushed blanking metal sheet (30).
2. The production method according to claim 1 , characterized by comprising the process step of obtaining a region (40) subject to crushing which comprises crushed regions (50) having geometric form.
3. The production method according to claim 1 , characterized by comprising the process step of obtaining a region (40) subject to crushing which comprises crushed regions (50) with square form.
4. The production method according to claim 1 , characterized by comprising the process step of obtaining a region (40) subject to crushing which comprises crushed regions (50) in which equal or different crushing range (d) exists between them.
5. The production method according to any claims 2, 3 or 4 characterized by comprising the process step of obtaining a region (40) subject to crushing which comprises 5x5 mm sized square formed crushed regions (50) that are aligned side by side or subsequently in a manner to comprise 5 mm crushing range (d).
6. The production method according to any claims 2, 3, 4 or 5 characterized by comprising the process step of crushing the blanking metal sheet (20) in a manner such that the crushed region (50) has a depth with 2/3 ratio of the blanking metal sheet (20) thickness.
7. The production method according to claim 1 , characterized by comprising the process step of forming the crushed blanking metal sheet (30) by bending.
8. A control arm (10) used in the suspension systems of the vehicles consists of a blanking metal sheet (20) which comprise a region (40) subject to crushing.
PCT/TR2019/050079 2018-02-09 2019-02-08 Strengthened control arm and production method thereof WO2019226138A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2018/01836 2018-02-09
TR2018/01836A TR201801836A2 (en) 2018-02-09 2018-02-09 AN STRENGTH OF SWING ARM AND PRODUCTION METHOD

Publications (2)

Publication Number Publication Date
WO2019226138A2 true WO2019226138A2 (en) 2019-11-28
WO2019226138A3 WO2019226138A3 (en) 2020-01-02

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PCT/TR2019/050079 WO2019226138A2 (en) 2018-02-09 2019-02-08 Strengthened control arm and production method thereof

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WO (1) WO2019226138A2 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3505899B2 (en) * 1996-03-04 2004-03-15 トヨタ自動車株式会社 Vehicle suspension arm
IT1390790B1 (en) * 2008-07-11 2011-10-19 Tiberina Solutions S R L METHOD FOR MOLDING AN ARM FOR AUTOMOTIVE SUSPENSIONS
IT1398384B1 (en) * 2009-02-05 2013-02-22 Sistemi Sospensioni Spa OSCILLATING ARM FOR VEHICLE SUSPENSION AND PROCEDURE FOR ITS REALIZATION

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TR201801836A2 (en) 2018-03-21
WO2019226138A3 (en) 2020-01-02

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