CN111774473A - A kind of automobile suspension trailing arm body and manufacturing method - Google Patents
A kind of automobile suspension trailing arm body and manufacturing method Download PDFInfo
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- CN111774473A CN111774473A CN202010450569.3A CN202010450569A CN111774473A CN 111774473 A CN111774473 A CN 111774473A CN 202010450569 A CN202010450569 A CN 202010450569A CN 111774473 A CN111774473 A CN 111774473A
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- 239000000725 suspension Substances 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000004080 punching Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 238000005554 pickling Methods 0.000 claims abstract description 9
- 238000007493 shaping process Methods 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000009966 trimming Methods 0.000 claims abstract description 9
- 238000007514 turning Methods 0.000 claims description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 12
- 238000010008 shearing Methods 0.000 abstract description 4
- 238000007689 inspection Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
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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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
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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
- 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
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/085—Iron or steel solutions containing HNO3
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- Chemical Kinetics & Catalysis (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
本发明公开了一种汽车悬架纵臂本体及制造方法，属于汽车零部件加工技术领域。悬架纵臂本体包括正、反两面均设有凸起结构的弯曲部，弯曲部的一端设有用于连接轴的孔Ⅰ，弯曲部的另一端设成U型构造，U型构造的两个平行段上均设置有用于固定的孔Ⅱ。其制造方法为：将钢板依次进行剪板，落料冲孔，拉延成型，翻边整形，冲孔，翻边翻孔，修边冲孔，再酸洗，即得。本发明的汽车悬架纵臂本体，通过对整体结构进行优化，以及严格控制制造工序中的工艺参数，并进一步通过酸洗，以降低或消除应力值和变形问题，从而得到强度适中、结构均匀、性能稳定的汽车悬架纵臂本体，满足质量检测要求，在工业上适于推广应用。
The invention discloses an automobile suspension trailing arm body and a manufacturing method, and belongs to the technical field of automobile parts processing. The suspension trailing arm body includes a curved part with a convex structure on both sides, one end of the curved part is provided with a hole I for connecting the shaft, the other end of the curved part is set into a U-shaped structure, and two U-shaped structures are provided. The parallel sections are provided with holes II for fixing. The manufacturing method is as follows: shearing the steel plate, blanking and punching, drawing forming, flanging and shaping, punching, flanging and flanging, trimming and punching, and pickling again. The automobile suspension trailing arm body of the present invention can be obtained by optimizing the overall structure, strictly controlling the process parameters in the manufacturing process, and further by pickling to reduce or eliminate the stress value and deformation problems, thereby obtaining moderate strength and uniform structure. , The trailing arm body of automobile suspension with stable performance meets the requirements of quality inspection and is suitable for popularization and application in industry.
Description
技术领域technical field
本发明涉及汽车零部件加工技术领域，具体涉及一种汽车悬架纵臂本体及制造方法。The invention relates to the technical field of automobile parts processing, in particular to an automobile suspension trailing arm body and a manufacturing method.
背景技术Background technique
伴随着世界汽车产业的发展和生活品质的提高，人们对汽车的要求也在不断的发生变化。汽车的作用已不仅仅只是代步，它还必须具有一定的乘坐舒适性、良好的操纵稳定性、行驶的安全性等功能。而悬架系统作为汽车系统中重要的组成部分之一，是保证汽车乘坐舒适性、驾驶操纵稳定性、安全性、越野通过性等的重要部件。悬架系统对汽车性能的发挥和车辆在极限状态下的安全，有着重要的影响。悬架系统技术状况、稳定性的好坏，已作为衡量汽车质量的重要指标之一。With the development of the world's automobile industry and the improvement of the quality of life, people's requirements for automobiles are constantly changing. The role of a car is not only for transportation, it must also have certain functions such as ride comfort, good handling stability, and driving safety. As one of the important components of the automobile system, the suspension system is an important component to ensure the ride comfort, driving stability, safety, and off-road passability of the automobile. The suspension system has an important influence on the performance of the vehicle and the safety of the vehicle under the limit state. The technical status and stability of the suspension system have been used as one of the important indicators to measure the quality of the vehicle.
悬架系统作为车辆的重要组成部分，它是一种把车轮和车身弹性连接在一起的重要部件。近几年，因汽车悬架系统问题造成多起整车质量问题。如2014 年11月4日，“大众”因新速腾后轴纵臂断裂问题召回了大量汽车，因此，汽车悬架纵臂的安全性至关重要。悬架纵臂断裂的原因，除了因焊接品质不佳导致外，另外就是纵臂本体边缘处应力值过大造成。而疲劳断裂便是起源于应力过大值处，即“应力峰值”所在之处。As an important part of the vehicle, the suspension system is an important component that elastically connects the wheels and the body together. In recent years, there have been many vehicle quality problems caused by problems with the automobile suspension system. For example, on November 4, 2014, "Volkswagen" recalled a large number of cars due to the fracture of the trailing arm of the rear axle of the new Sagitar. Therefore, the safety of the trailing arm of the automobile suspension is very important. The reason for the fracture of the suspension trailing arm is not only due to poor welding quality, but also the excessive stress at the edge of the trailing arm body. The fatigue fracture originates from the excessive stress, that is, where the "stress peak" is located.
发明内容SUMMARY OF THE INVENTION
有鉴于此，本发明的目的在于提供一种汽车悬架纵臂本体及制造方法。In view of this, an object of the present invention is to provide an automobile suspension trailing arm body and a manufacturing method.
为了实现上述目的，本案发明人经长期研究和大量实践，得以提出本发明技术方案，具体实施过程如下：In order to achieve the above-mentioned purpose, the inventor of this case has been able to propose the technical solution of the present invention through long-term research and a large amount of practice. The specific implementation process is as follows:
1、一种汽车悬架纵臂本体，所述悬架纵臂本体包括正、反两面均设有凸起结构的弯曲部；所述弯曲部的一端设有用于连接轴的孔Ⅰ，所述弯曲部的另一端设成U型构造，所述U型构造的两个平行段上均设置有用于固定的孔Ⅱ。1. An automobile suspension trailing arm body, the suspension trailing arm body includes a curved portion with a convex structure on both sides; one end of the curved portion is provided with a hole I for connecting a shaft, and the The other end of the bent portion is set in a U-shaped configuration, and two parallel sections of the U-shaped configuration are provided with holes II for fixing.
优选的，所述U型构造靠近弯曲部内侧的平行段的长度大于靠近弯曲部外侧的平行段。Preferably, the length of the parallel section near the inner side of the curved portion of the U-shaped structure is greater than the length of the parallel section near the outer side of the curved portion.
2上述汽车悬架纵臂本体的制造方法，包括以下步骤：先将钢板依次进行剪板，落料冲孔，拉延成型，翻边整形，冲孔，翻边翻孔，修边冲孔，然后再进行酸洗，即得悬架纵臂本体。2. The manufacturing method of the above-mentioned automobile suspension trailing arm body, comprising the following steps: firstly cutting the steel plate, blanking and punching, drawing forming, flanging and shaping, punching, flanging and turning, trimming and punching, Then pickling is performed to obtain the suspension trailing arm body.
优选的，所述钢板采用SAPH440厚度为3.0mm的单层钢板。Preferably, the steel sheet adopts SAPH440 single-layer steel sheet with a thickness of 3.0 mm.
优选的，所述落料冲孔的主缸压力为18mpa，所述拉延成型的顶缸压力为 3mpa，主缸压力为20mpa。其中，落料的目的在于提高产品材料的利用率。拉延成型的作用在于消除产品部分应力。Preferably, the pressure of the master cylinder of the blanking and punching is 18mpa, the pressure of the top cylinder of the drawing and forming is 3mpa, and the pressure of the master cylinder is 20mpa. Among them, the purpose of blanking is to improve the utilization rate of product materials. The function of drawing forming is to relieve the stress of part of the product.
优选的，所述翻边整形的顶缸压力为3mpa，主缸压力为20mpa，所述冲孔的主缸压力为10mpa。其中，翻边整形的目的在于消除产品的应力以解决产品变形问题。冲孔以满足产品孔位要求。Preferably, the pressure of the top cylinder of the flanging shaping is 3mpa, the pressure of the master cylinder is 20mpa, and the pressure of the master cylinder of the punching is 10mpa. Among them, the purpose of flanging shaping is to eliminate the stress of the product to solve the problem of product deformation. Punch holes to meet product hole position requirements.
优选的，所述翻边翻孔的顶缸压力为3mpa，主缸压力为20mpa，所述修边冲孔的主缸压力为10mpa。其中，翻边翻孔的作用在于去除产品应力后，增加产品强度。修边冲孔的作用在于满足产品的装配需求和减轻产品重量。Preferably, the pressure of the top cylinder of the flanging and punching is 3mpa, the pressure of the master cylinder is 20mpa, and the pressure of the master cylinder of the trimming and punching is 10mpa. Among them, the function of flanging and turning is to increase the strength of the product after removing the stress of the product. The function of trimming and punching is to meet the assembly requirements of the product and reduce the weight of the product.
优选的，采用硝酸进行酸洗处理。采用硝酸清洗的目的在于除去铁屑钢末，并对悬架纵臂本体进行钝化。Preferably, nitric acid is used for pickling treatment. The purpose of cleaning with nitric acid is to remove iron filings and to passivate the suspension trailing arm body.
在实际生产过程中发现，下模压力和摩擦系数的交互作用对工件的变形有着明显的影响，是影响成形结果的重要因素，增大下模压力和摩擦系数，可以有效地抑制成形件的变形量，但是下模压力和摩擦系数过大，又会导致截面件的根部开裂。因此，本发明的汽车悬架纵臂本体的制造方法，针对SAPH440钢深冲纵臂在成形过程中的开裂问题，通过建立有限元模型，基于弹塑性有限元理论进行成形仿真计算，分析下模压力、摩擦系数对成形结果中危险部位减薄率的影响规律，从而得到最佳工艺参数。In the actual production process, it is found that the interaction between the lower die pressure and the friction coefficient has a significant impact on the deformation of the workpiece, which is an important factor affecting the forming results. Increasing the lower die pressure and friction coefficient can effectively suppress the deformation of the formed parts. However, the lower die pressure and friction coefficient are too large, which will cause the root of the section to crack. Therefore, the manufacturing method of the automobile suspension trailing arm body of the present invention is aimed at the cracking problem of the SAPH440 steel deep-drawing trailing arm during the forming process. By establishing a finite element model, the forming simulation calculation is performed based on the elastic-plastic finite element theory, and the lower die is analyzed. The influence law of pressure and friction coefficient on the thinning rate of dangerous parts in the forming results, so as to obtain the best process parameters.
本发明的有益效果在于：The beneficial effects of the present invention are:
1)本发明的汽车悬架纵臂本体，通过将正、反两面均成凸起结构的弯曲部；并在弯曲部的一端设置用于连接轴的孔Ⅰ，另一端设成用于与其他部件配合使用的U型构造，U型构造的两个平行段上均设置有用于固定的孔Ⅱ，U型构造靠近弯曲部内侧的平行段的长度大于靠近弯曲部外侧的平行段，对整体结构进行优化，从而降低应力峰值，避免疲劳断裂；1) The vehicle suspension trailing arm body of the present invention is formed by forming a curved portion with a convex structure on both the positive and negative sides; and one end of the curved portion is provided with a hole I for connecting the shaft, and the other end is provided for connecting with other The U-shaped structure used in conjunction with the components, the two parallel sections of the U-shaped structure are provided with holes II for fixing, and the length of the parallel section near the inner side of the curved part of the U-shaped structure is larger than that near the outer side of the curved part. Optimized to reduce stress peaks and avoid fatigue fractures;
2)本发明的汽车悬架纵臂本体的制造方法，通过严格控制剪板、落料+冲孔、拉延+成形、翻边+整形、修边+冲孔、翻边+翻孔、冲孔等工序中的工艺参数，从而降低产品生产成本，提高产品的材料利用率和结构强度，从而进一步降低或消除产品的应力值和变形问题，特别是产品的断裂问题，以延长产品的疲劳寿命，满足质量检测要求；2) The manufacturing method of the automobile suspension trailing arm body of the present invention, through strict control of shearing, blanking + punching, drawing + forming, flanging + shaping, trimming + punching, flanging + turning, punching Process parameters in the process such as holes, thereby reducing the production cost of the product, improving the material utilization rate and structural strength of the product, thereby further reducing or eliminating the stress value and deformation problems of the product, especially the fracture problem of the product, so as to prolong the fatigue life of the product , to meet the quality inspection requirements;
3)本发明的汽车悬架纵臂本体的制造方法，通过合理控制冲压成型过程中的各项工艺参数，并进一步通过酸洗，使得悬架纵臂本体产品的表面质量好，便于涂油和上漆，从而得到强度适中、结构均匀、性能稳定的汽车悬架纵臂本体，在工业上适于推广应用。3) The manufacturing method of the automobile suspension trailing arm body of the present invention, through reasonable control of various process parameters in the stamping and forming process, and further through pickling, the surface quality of the suspension trailing arm body product is good, and it is convenient for oiling and cleaning. paint, thereby obtaining an automobile suspension trailing arm body with moderate strength, uniform structure and stable performance, which is suitable for popularization and application in industry.
附图说明Description of drawings
图1为本发明的汽车悬架纵臂本体的结构示意图。FIG. 1 is a schematic structural diagram of an automobile suspension trailing arm body of the present invention.
具体实施方式Detailed ways
为了进一步理解本发明，下面结合实施例对本发明优选实施方案进行描述，但是应当理解，这些描述只是为进一步说明本发明的特征和优点，而不是对本发明权利要求的限制。In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with the examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.
实施例1Example 1
如图1所示，一种汽车悬架纵臂本体，包括正、反两面均设有凸起结构2 的弯曲部1；弯曲部1的一端设有用于连接轴的孔Ⅰ3，弯曲部1的另一端设成 U型构造4，U型构造4的两个平行段上均设置有用于固定的孔Ⅱ5。U型构造5 靠近弯曲部1内侧的平行段的长度大于靠近弯曲部1外侧的平行段。As shown in Fig. 1, an automobile suspension trailing arm body includes a
上述汽车悬架纵臂本体的制造方法，包括以下步骤：将SAPH440厚度为 3.0mm的单层钢板依次进行剪板，在主缸压力为18mpa的条件下进行落料冲孔，在顶缸压力为3mpa，主缸压力为20mpa的条件下进行拉延成型，在顶缸压力为3mpa，主缸压力为20mpa的条件下进行翻边整形，在主缸压力为10mpa的条件下冲孔，在顶缸压力为3mpa，主缸压力为20mpa的条件下翻边翻孔，在主缸压力为10mpa的条件下修边冲孔，然后再进行酸洗，即得悬架纵臂本体。The manufacturing method of the above-mentioned automobile suspension trailing arm body includes the following steps: shearing the SAPH440 single-layer steel plate with a thickness of 3.0mm in turn, blanking and punching under the condition that the master cylinder pressure is 18mpa, and the top cylinder pressure is 3mpa, the main cylinder pressure is 20mpa for drawing forming, the top cylinder pressure is 3mpa, the main cylinder pressure is 20mpa for flanging and shaping, the main cylinder pressure is 10mpa for punching, and the top cylinder Under the condition of pressure of 3mpa and master cylinder of 20mpa, flanging and drilling, trimming and punching under the condition of master cylinder pressure of 10mpa, and then pickling, the suspension trailing arm body is obtained.
经过检测分析，本实施例制得的汽车悬架纵臂本体的各项性能参数均符合质量检测要求。After testing and analysis, the performance parameters of the automobile suspension trailing arm body prepared in this example all meet the quality testing requirements.
综上所述，本发明的汽车悬架纵臂本体，通过将正、反两面均成凸起结构的弯曲部；并在弯曲部的一端设置用于连接轴的孔Ⅰ，另一端设成用于与其他部件配合使用的U型构造，U型构造的两个平行段上均设置有用于固定的孔Ⅱ， U型构造靠近弯曲部内侧的平行段的长度大于靠近弯曲部外侧的平行段，对整体结构进行优化，从而降低应力峰值，避免疲劳断裂；并通过严格控制剪板、落料+冲孔、拉延+成形、翻边+整形、修边+冲孔、翻边+翻孔、冲孔等工序中的工艺参数，从而降低产品生产成本，提高产品的材料利用率和结构强度，从而进一步降低或消除产品的应力值和变形问题，特别是产品的断裂问题，以延长产品的疲劳寿命，满足质量检测要求。本发明的汽车悬架纵臂本体的制造方法，通过合理控制冲压成型过程中的各项工艺参数，并进一步通过酸洗，使得悬架纵臂本体产品的表面质量好，便于涂油和上漆，从而得到强度适中、结构均匀、性能稳定的汽车悬架纵臂本体，在工业上适于推广应用。To sum up, the main body of the trailing arm of the automobile suspension of the present invention is formed by forming a curved portion with a convex structure on both the front and the back; and a hole I for connecting the shaft is provided at one end of the curved portion, and the other end is provided with a hole I for connecting the shaft. For the U-shaped structure used in conjunction with other components, the two parallel sections of the U-shaped structure are provided with holes II for fixing, and the length of the parallel section near the inner side of the curved portion of the U-shaped structure is greater than that near the outer side of the curved portion. Optimize the overall structure to reduce stress peaks and avoid fatigue fracture; and through strict control of shearing, blanking + punching, drawing + forming, flanging + shaping, trimming + punching, flanging + turning, Process parameters in processes such as punching, thereby reducing the production cost of the product, improving the material utilization rate and structural strength of the product, thereby further reducing or eliminating the stress value and deformation problems of the product, especially the fracture problem of the product, so as to prolong the fatigue of the product life and meet the quality inspection requirements. The manufacturing method of the automobile suspension trailing arm body of the present invention, through reasonable control of various process parameters in the stamping and forming process, and further through pickling, the surface quality of the suspension trailing arm body product is good, and it is convenient for oiling and painting. , thereby obtaining an automobile suspension trailing arm body with moderate strength, uniform structure and stable performance, which is suitable for popularization and application in industry.
以上所述实施例仅是为充分说明本发明而所举的较佳的实施例，本发明的保护范围不限于此。本技术领域的技术人员在本发明基础上所作的等同替代或变换，均在本发明的保护范围之内。本发明的保护范围以权利要求书为准。The above-mentioned embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention is subject to the claims.
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