阅读说明：本技术 一种轻量化汽车铝合金中空控制臂生产工艺 (Production process of lightweight automobile aluminum alloy hollow control arm ) 是由 宗绪惠 罗锦荣 范纲衔 何浚愷 梁作富 于 2021-08-04 设计创作，主要内容包括：本发明公开了一种轻量化汽车铝合金中空控制臂生产工艺,属于汽车零部件技术领域,包括以下步骤：S1、建立有限元素分析模型进行拓谱分析；S2、对控制臂进行中空区域设计；S3、确定控制臂的中空设计方案；S4、加载有限元素分析模型进行应力状况分析；S5、将控制臂进行多部件式拆分制造；S6、对控制臂本体以及控制臂盖板进行生产制造；S7、将控制臂本体和控制臂盖板进行装夹；S8、将两异质材料进行接合焊接操作。该轻量化汽车铝合金中空控制臂生产工艺,通过利用多部件式结构组装进行摩擦搅拌焊接,创造空腔区域,不仅能解决目前控制臂轻量化的瓶颈,同时对于连续生产制程的可行性也大幅提升。(The invention discloses a production process of a lightweight automobile aluminum alloy hollow control arm, belonging to the technical field of automobile parts and comprising the following steps of: s1, establishing a finite element analysis model for spectrum expansion analysis; s2, designing a hollow area of the control arm; s3, determining a hollow design scheme of the control arm; s4, loading a finite element analysis model to analyze the stress condition; s5, performing multi-component split manufacturing on the control arm; s6, manufacturing the control arm body and the control arm cover plate; s7, clamping the control arm body and the control arm cover plate; and S8, carrying out joint welding operation on the two dissimilar materials. According to the production process of the lightweight automobile aluminum alloy hollow control arm, friction stir welding is performed by utilizing multi-component structure assembly, a cavity area is created, the bottleneck of lightweight of the existing control arm can be solved, and meanwhile, the feasibility of a continuous production process is greatly improved.)

1. A production process of a lightweight automobile aluminum alloy hollow control arm is characterized by comprising the following steps:

s1, establishing a finite element analysis model for light weight, and carrying out spectrum expansion analysis;

s2, designing a hollow area of the control arm according to the spectrum analysis result;

s3, determining a hollow design scheme of the control arm, and drawing a design drawing of the control arm;

s4, loading a finite element analysis model to analyze the stress condition;

s5, performing multi-component split manufacturing on the control arm, and splitting the control arm into a control arm body component and a control arm cover plate component;

s6, manufacturing the two dissimilar materials of the control arm body and the control arm cover plate according to the normal production process of the automobile;

s7, clamping the control arm body and the control arm cover plate on the numerical control friction stir welding equipment;

s8, setting each parameter value of the numerical control friction stir welding equipment, and carrying out joint welding operation on the two heterogeneous materials;

s9, performing preliminary heat treatment on the control arm before friction stir welding;

s10, slicing materials on the control arm test piece subjected to friction stir welding;

s11, preparing a test sample from the slice;

s12, carrying out quality test on the test sample, and observing the metallographic structure and the test mechanical property of the test sample;

and S13, carrying out mass production of the hollow control arm after the quality test is qualified.

2. The production process of the lightweight automobile aluminum alloy hollow control arm as recited in claim 1, wherein in S2, the finite element analysis model is loaded in the finite element analysis software, and the finite element analysis software is used to perform a spectrum optimization design on the control arm to establish the optimized hollow region model.

3. The production process of the lightweight automobile aluminum alloy hollow control arm as claimed in claim 1, wherein in the step S3, when drawing a control arm design drawing, a digital-analog drawing is performed by using CAD software of which the model is greater than or equal to CAD2007 version.

4. The process for producing a hollow control arm made of aluminum alloy for a lightweight automobile according to claim 1, wherein in step S5, the control arm is fabricated by friction stir welding through multi-part structural assembly, and a cavity region of the control arm is created.

5. The production process of the lightweight automobile aluminum alloy hollow control arm as recited in claim 1, wherein in S7, before clamping, the control arm body and the control arm cover plate are cleaned and greasy dirt on the surface is removed.

6. The production process of the lightweight automobile aluminum alloy hollow control arm as recited in claim 1, wherein in S7, the size of the stirring head of the numerical control friction stir welding equipment is 10-25mm in shaft shoulder diameter, 3-7mm in stirring pin diameter, 5-10mm in length, and 2-5 ° in inclination angle, and the shape of the stirring head is designed by adopting a thread structure.

7. The production process of the lightweight automobile aluminum alloy hollow control arm as claimed in claim 1, wherein in the step S9, the pre-heat treatment comprises the following specific steps:

(1) 530 ℃ and 540 ℃ for 60-90 minutes, and carrying out solid melting heat treatment;

(2) after solid melting, carrying out water cooling with the water temperature of 25-90 ℃;

(3) and after cooling, carrying out artificial aging treatment.

8. The production process of the lightweight automobile aluminum alloy hollow control arm as recited in claim 7, wherein during the artificial aging treatment, each part of the control arm is kept at 145-155 ℃ for 1-2 hours in a heating state, and then is cooled with water.

9. The production process of the lightweight automobile aluminum alloy hollow control arm as recited in claim 1, wherein in S8, the numerical values of the parameters of the numerical control friction stir welding equipment include parameters of the rotating speed of the stirring pin, the welding speed and the pressing amount.

10. The process of claim 1, wherein in step S6, the control arm body and the control arm cover plate comprise a plurality of different slender components, and the slender components are cast and assembled by using a multi-piece structure and joined by friction stir welding.

Technical Field

The invention belongs to the technical field of automobile parts, and particularly relates to a production process of a lightweight automobile aluminum alloy hollow control arm.

Background

One of the important issues for automobile manufacturers to reduce the weight of automobile parts is to reduce the energy consumption during the driving of the automobile and to reduce the CO during the manufacture of the product₂And (4) discharging the amount.

In the prior art, the existing aluminum alloy low-pressure casting is difficult to produce a hollow structure, and the sand core and the salt core are used as one of the methods, but the problem that sand and salt are remained in a die cavity to influence the next die production still cannot be solved at present. Also, for casting of elongated parts, smooth production in a single part is often not possible.

Therefore, a production process of the lightweight automobile aluminum alloy hollow control arm is provided to solve the problems.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a production process of a lightweight automobile aluminum alloy hollow control arm, which aims to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a production process of a lightweight automobile aluminum alloy hollow control arm comprises the following steps:

s1, establishing a finite element analysis model for light weight, and carrying out spectrum expansion analysis;

s2, designing a hollow area of the control arm according to the spectrum analysis result;

s3, determining a hollow design scheme of the control arm, and drawing a design drawing of the control arm;

s4, loading a finite element analysis model to analyze the stress condition;

s5, performing multi-component split manufacturing on the control arm, and splitting the control arm into a control arm body component and a control arm cover plate component;

s6, manufacturing the two dissimilar materials of the control arm body and the control arm cover plate according to the normal production process of the automobile;

s7, clamping the control arm body and the control arm cover plate on the numerical control friction stir welding equipment;

s8, setting each parameter value of the numerical control friction stir welding equipment, and carrying out joint welding operation on the two heterogeneous materials;

s9, performing preliminary heat treatment on the control arm before friction stir welding;

s10, slicing materials on the control arm test piece subjected to friction stir welding;

s11, preparing a test sample from the slice;

s12, carrying out quality test on the test sample, and observing the metallographic structure and the test mechanical property of the test sample;

and S13, carrying out mass production of the hollow control arm after the quality test is qualified.

In step S2, the finite element analysis model is loaded in the finite element analysis software, and the finite element analysis software is used to perform a spectrum optimization design on the control arm, so as to establish an optimized hollow region model.

Further optimizing the technical solution, in S3, when drawing the control arm design drawing, the digital-analog drawing is performed by using CAD software of a model above the CAD2007 version.

In step S5, the control arm is fabricated by friction stir welding using a multi-part structural assembly, and a cavity region of the control arm is created.

Further optimizing the technical scheme, in the step S7, before clamping, the control arm body and the control arm cover plate are cleaned and oil stains on the surface are removed.

Further optimizing the technical scheme, in the S7, the size of the stirring head of the numerical control friction stir welding equipment is 10-25mm of the diameter of the shaft shoulder, 3-7mm of the diameter of the stirring pin, 5-10mm of the length of the stirring pin and 2-5 degrees of inclination angle, and meanwhile, the shape of the stirring head is designed by adopting a thread structure.

Further optimizing the technical solution, in S9, the pre-heat treatment includes the following specific steps:

(1) 530 ℃ and 540 ℃ for 60-90 minutes, and carrying out solid melting heat treatment;

(2) after solid melting, carrying out water cooling with the water temperature of 25-90 ℃;

(3) and after cooling, carrying out artificial aging treatment.

Further optimizing the technical scheme, during the artificial aging treatment, all parts of the control arm are kept at the temperature of 145-155 ℃ for 1-2 hours in a heating state, and then water cooling is carried out.

Further optimizing the technical scheme, in the step S8, each parameter value of the numerical control friction stir welding device includes a rotating speed of the stirring pin, a welding speed and a pressing amount parameter.

In S6, the control arm body and the control arm cover include a plurality of different slender components, and the slender components are cast and assembled by using a multi-piece structure and joined by friction stir welding.

Compared with the prior art, the invention provides a production process of a lightweight automobile aluminum alloy hollow control arm, which has the following beneficial effects:

1. according to the production process of the lightweight automobile aluminum alloy hollow control arm, friction stir welding is performed by utilizing multi-component structure assembly, a cavity area is created, the bottleneck of lightweight of the existing control arm can be solved, and meanwhile, the feasibility of a continuous production process is greatly improved.

2. This lightweight car aluminum alloy cavity control arm production technology to the casting of slender type part in the control arm, often can't produce smoothly in single part, through the equipment of multi-piece formula structure to use friction stir welding to join, can not only improve the casting defect in the production, also can utilize friction stir welding to carry out the joining of xenogenesis material, improve spare part own mechanical strength by a wide margin.

Drawings

FIG. 1 is a schematic flow chart of a production process of a lightweight automobile aluminum alloy hollow control arm provided by the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1, a production process of a lightweight automobile aluminum alloy hollow control arm includes the following steps:

s1, establishing a finite element analysis model for light weight, and carrying out spectrum expansion analysis;

s2, loading the finite element analysis model in finite element analysis software, performing spectrum expansion optimization design on the control arm by using the finite element analysis software, establishing an optimized hollow region model, and performing hollow region design on the control arm according to a spectrum expansion analysis result;

s3, determining a hollow design scheme of the control arm, and drawing a design drawing of the control arm on CAD software with the model number of CAD2020 in a digital-analog manner;

s4, loading a finite element analysis model to analyze the stress condition;

s5, performing multi-component split manufacturing on the control arm, splitting the control arm into a control arm body component and a control arm cover plate component, assembling the control arm by using a multi-component structure, performing friction stir welding manufacturing, and creating a cavity area of the control arm;

s6, manufacturing the two dissimilar materials of the control arm body and the control arm cover plate according to the normal production process of the automobile;

s7, before clamping, cleaning the control arm body and the control arm cover plate, removing oil stains on the surface, and clamping the control arm body and the control arm cover plate on the numerical control friction stir welding equipment;

the size of a stirring head of the numerical control friction stir welding equipment is 10-25mm of shaft shoulder diameter, 3-7mm of stirring needle diameter, 5-10mm of length and 2-5 degrees of inclination angle, and meanwhile, the shape of the stirring head is designed by adopting a thread structure.

S8, setting various parameter values of the numerical control friction stir welding equipment, wherein the various parameter values of the numerical control friction stir welding equipment comprise parameters of rotating speed, welding speed and pressing quantity of a stirring pin, and carrying out joint welding operation on the two heterogeneous materials;

s9, performing preliminary heat treatment on the control arm before friction stir welding;

wherein, the preliminary heat treatment comprises the following specific steps:

(1) 530 ℃ and 540 ℃ for 60-90 minutes, and carrying out solid melting heat treatment;

(2) after solid melting, carrying out water cooling with the water temperature of 25-90 ℃;

(3) and after cooling, carrying out artificial aging treatment.

Specifically, during the artificial aging treatment, all parts of the control arm are kept at the temperature of 145-155 ℃ for 1-2 hours in a heating state, and then water cooling is carried out.

S10, slicing materials on the control arm test piece subjected to friction stir welding;

s11, preparing a test sample from the slice;

s12, carrying out quality test on the test sample, and observing the metallographic structure and the test mechanical property of the test sample;

and S13, carrying out mass production of the hollow control arm after the quality test is qualified.

In S6, the control arm body and the control arm cover include a plurality of different elongated members, and the elongated members are cast and assembled by a multi-piece structure and joined by friction stir welding.

Example two:

a production process of a lightweight automobile aluminum alloy hollow control arm comprises the following steps:

s1, establishing a finite element analysis model for light weight, and carrying out spectrum expansion analysis;

s2, loading the finite element analysis model in finite element analysis software, performing spectrum expansion optimization design on the control arm by using the finite element analysis software, establishing an optimized hollow region model, and performing hollow region design on the control arm according to a spectrum expansion analysis result;

s3, determining a hollow design scheme of the control arm, and drawing a design drawing of the control arm on CAD software with the model number of CAD2018 in a digital-analog mode;

s4, loading a finite element analysis model to analyze the stress condition;

s5, performing multi-component split manufacturing on the control arm, splitting the control arm into a control arm body component and a control arm cover plate component, assembling the control arm by using a multi-component structure, performing friction stir welding manufacturing, and creating a cavity area of the control arm;

s6, manufacturing the two dissimilar materials of the control arm body and the control arm cover plate according to the normal production process of the automobile;

s7, before clamping, cleaning the control arm body and the control arm cover plate, removing oil stains on the surface, and clamping the control arm body and the control arm cover plate on the numerical control friction stir welding equipment;

the size of a stirring head of the numerical control friction stir welding equipment is 10-25mm of shaft shoulder diameter, 3-7mm of stirring needle diameter, 5-10mm of length and 2-5 degrees of inclination angle, and meanwhile, the shape of the stirring head is designed by adopting a thread structure.

S8, setting various parameter values of the numerical control friction stir welding equipment, wherein the various parameter values of the numerical control friction stir welding equipment comprise parameters of rotating speed, welding speed and pressing quantity of a stirring pin, and carrying out joint welding operation on the two heterogeneous materials;

s9, performing preliminary heat treatment on the control arm before friction stir welding;

wherein, the preliminary heat treatment comprises the following specific steps:

(1) keeping the temperature at 535 ℃ for 70 minutes, and performing solid melting heat treatment;

(2) after solid melting, carrying out water cooling with the water temperature of 60 ℃;

(3) and after cooling, carrying out artificial aging treatment.

Specifically, during the artificial aging treatment, all parts of the control arm are kept at the temperature of 145-155 ℃ for 1-2 hours in a heating state, and then water cooling is carried out.

S10, slicing materials on the control arm test piece subjected to friction stir welding;

s11, preparing a test sample from the slice;

s12, carrying out quality test on the test sample, and observing the metallographic structure and the test mechanical property of the test sample;

and S13, carrying out mass production of the hollow control arm after the quality test is qualified.

In S6, the control arm body and the control arm cover include a plurality of different elongated members, and the elongated members are cast and assembled by a multi-piece structure and joined by friction stir welding.

Example three:

a production process of a lightweight automobile aluminum alloy hollow control arm comprises the following steps:

s1, establishing a finite element analysis model for light weight, and carrying out spectrum expansion analysis;

s2, loading the finite element analysis model in finite element analysis software, performing spectrum expansion optimization design on the control arm by using the finite element analysis software, establishing an optimized hollow region model, and performing hollow region design on the control arm according to a spectrum expansion analysis result;

s3, determining a hollow design scheme of the control arm, and drawing a design drawing of the control arm on CAD software with the model of CAD2016 in a digital-analog manner;

s4, loading a finite element analysis model to analyze the stress condition;

s5, performing multi-component split manufacturing on the control arm, splitting the control arm into a control arm body component and a control arm cover plate component, assembling the control arm by using a multi-component structure, performing friction stir welding manufacturing, and creating a cavity area of the control arm;

s6, manufacturing the two dissimilar materials of the control arm body and the control arm cover plate according to the normal production process of the automobile;

s7, before clamping, cleaning the control arm body and the control arm cover plate, removing oil stains on the surface, and clamping the control arm body and the control arm cover plate on the numerical control friction stir welding equipment;

wherein, the stirring head size of numerical control friction stir welding equipment is shaft shoulder diameter 15mm, and stirring needle diameter 5mm, length 7.5mm, and inclination is 4, and the shape of stirring head adopts the helicitic texture design simultaneously.

S8, setting various parameter values of the numerical control friction stir welding equipment, wherein the various parameter values of the numerical control friction stir welding equipment comprise parameters of rotating speed, welding speed and pressing quantity of a stirring pin, and carrying out joint welding operation on the two heterogeneous materials;

s9, performing preliminary heat treatment on the control arm before friction stir welding;

wherein, the preliminary heat treatment comprises the following specific steps:

(1) 530 ℃ and 540 ℃ for 60-90 minutes, and carrying out solid melting heat treatment;

(2) after solid melting, carrying out water cooling with the water temperature of 25-90 ℃;

(3) and after cooling, carrying out artificial aging treatment.

Specifically, during the artificial aging treatment, all parts of the control arm are kept at the temperature of 145-155 ℃ for 1-2 hours in a heating state, and then water cooling is carried out.

S10, slicing materials on the control arm test piece subjected to friction stir welding;

s11, preparing a test sample from the slice;

s12, carrying out quality test on the test sample, and observing the metallographic structure and the test mechanical property of the test sample;

and S13, carrying out mass production of the hollow control arm after the quality test is qualified.

In S6, the control arm body and the control arm cover include a plurality of different elongated members, and the elongated members are cast and assembled by a multi-piece structure and joined by friction stir welding.

The invention has the beneficial effects that:

1. according to the production process of the lightweight automobile aluminum alloy hollow control arm, friction stir welding is performed by utilizing multi-component structure assembly, a cavity area is created, the bottleneck of lightweight of the existing control arm can be solved, and meanwhile, the feasibility of a continuous production process is greatly improved.

2. This lightweight car aluminum alloy cavity control arm production technology to the casting of slender type part in the control arm, often can't produce smoothly in single part, through the equipment of multi-piece formula structure to use friction stir welding to join, can not only improve the casting defect in the production, also can utilize friction stir welding to carry out the joining of xenogenesis material, improve spare part own mechanical strength by a wide margin.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.