Connecting element and component connecting method

Abstract

The invention relates to a connecting element and a part connecting method, and belongs to the technical field of vehicles. The connecting element and the aluminum part are of an integrally-formed structure, and the connecting element is connected with the part connecting position of the steel part. The integrally-formed structure is formed by placing the connecting element at a target position in a die-casting cavity and then carrying out die-casting treatment on an aluminum material which corresponds to the aluminum part and is located in the die-casting cavity. By adopting the method, the connecting cost of the aluminum part and the steel part can be reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a connecting element and a parts connecting method. Background Art

[0002] With the continuous development of automobile electrification and the increasing demand of users for intelligence, the weight of the whole vehicle is also increasing. Compared with the fuel vehicles of the same level, it is 15% to 30% heavier. The increase in the weight of the whole vehicle will have some adverse effects, such as: increased energy consumption during driving, affecting the endurance of new energy vehicles, increasing the difficulty of control, affecting the safety of the whole vehicle, and reducing the power of the whole vehicle. Therefore, the demand for lightweight vehicles has become more and more urgent in recent years. One of the hot technologies for achieving lightweight in the current industry is integrated die-casting aluminum alloy technology, and the application of integrated die-casting aluminum alloy structural parts in automobiles is becoming more and more common.

[0003] Since the mechanical properties of aluminum parts are still inferior to those of steel parts, and steel parts will continue to be used in car bodies for a long time, the application of aluminum parts in automobiles will inevitably involve the connection between aluminum parts and steel parts. Since the physical properties such as electrical conductivity and thermal expansion coefficient between aluminum parts and steel parts are very different, direct contact between aluminum parts and steel parts is prone to electrochemical corrosion, and intermetallic brittle compounds will be generated after welding. Therefore, the connection between aluminum parts and steel parts is difficult to complete using traditional spot welding, molten inert gas shielded arc welding and other welding methods, and a mechanical connection process is required to complete the connection between the two.

[0004] However, the mechanical connection process requires the use of riveting equipment to replace the existing spot welding equipment, which will mean a large number of production line modifications and even the establishment of a proprietary steel-aluminum hybrid production line, greatly increasing the connection cost of aluminum parts and steel parts. Summary of the invention

[0005] Based on this, it is necessary to provide a parts connection method and a connection element that can reduce the connection cost of aluminum parts and steel parts in order to solve the above technical problems.

[0006] In a first aspect, the present application provides a connecting element, wherein the connecting element and the aluminum part are an integrally formed structure, and the connecting element is connected to a part connection of a steel part;

[0007] The integrally formed structure is formed by placing the connecting element at a target position in a die-casting cavity and then die-casting the aluminum material corresponding to the aluminum part and located in the die-casting cavity.

[0008] In one embodiment, the connecting element is a dumbbell-shaped structure; the dumbbell-shaped structure is connected to the part connection of the steel part by a spot welding process.

[0009] In one embodiment, the connecting element comprises a first cylindrical element and two second cylindrical elements, and the two second cylindrical elements are respectively arranged at two ends of the first cylindrical element;

[0010] The diameters of the arc surfaces at both ends of the first cylindrical element are larger than the diameter of the central arc surface of the first cylindrical element;

[0011] The diameter of the second cylindrical element matches the diameters of the arc surfaces at both ends of the first cylindrical element; and the height of the second cylindrical element is smaller than the height of the first cylindrical element.

[0012] In one embodiment, the aluminum part includes a first connecting end and a second connecting end, the first connecting end and the second connecting end are both connected to the connecting element, and the height of the first connecting end, the height of the second connecting end and the height of the connecting element are the same.

[0013] In the second aspect, the present application provides a connecting element, which is connected to an aluminum part through a prefabricated hole on the aluminum part, and the connecting element is connected to a part connection of a steel part; the aluminum part is obtained by die-casting an aluminum material; the position of the prefabricated hole corresponds to the part connection; the depth of the prefabricated hole matches the height of the connecting element; and the height of the connecting element matches the height of the aluminum part.

[0014] In one embodiment, the connecting element is a semi-dumbbell-shaped structure; the semi-dumbbell-shaped structure is connected to the part connection of the steel part by an electric welding process.

[0015] In one embodiment, the connecting element includes a third cylindrical element and a fourth cylindrical element, the diameter of the third cylindrical element is greater than the diameter of the fourth cylindrical element; and the height of the third cylindrical element is less than the height of the fourth cylindrical element.

[0016] In one embodiment, the aluminum part includes a third connecting end and a fourth connecting end, the third connecting end and the fourth connecting end are both connected to the connecting element, and the height of the third connecting end, the height of the fourth connecting end and the height of the connecting element are the same.

[0017] In a third aspect, the present application also provides a parts connection method, comprising:

[0018] After placing the connecting element at a target position in the die-casting cavity, die-casting the aluminum material corresponding to the aluminum part and located in the die-casting cavity to form an integrally formed structure;

[0019] The connecting element is connected to the part connection of the steel part.

[0020] In a fourth aspect, the present application also provides a parts connection method, comprising:

[0021] Aluminum parts are obtained by die-casting aluminum materials;

[0022] Determining the position of the prefabricated hole in the aluminum part, and setting the prefabricated hole at the determined position;

[0023] Connecting the connecting element to the aluminum part through the prefabricated hole on the aluminum part;

[0024] Connecting the connecting element to the part connection of the steel part; the position of the prefabricated hole corresponds to the part connection;

[0025] The depth of the prefabricated hole matches the height of the connecting element; and the height of the connecting element matches the height of the aluminum part.

[0026] The above-mentioned parts connection method and connecting element are formed by placing the connecting element at the target position in the die-casting cavity, and then die-casting the aluminum material corresponding to the aluminum part and located in the die-casting cavity to form an integral structure. The integral structure refers to an integral structure including the connecting element and the aluminum part, so that the aluminum part can be connected to the connecting element, and then the connecting element is connected to the part connection of the steel part. In this way, the connection between the aluminum part and the steel part can be achieved. Compared with the existing solution, it does not require a large number of production line modifications, and the connection between the aluminum part and the steel part is also realized, reducing the connection cost of the aluminum part and the steel part. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of a connection between an aluminum part and a steel part;

[0029] Figure 2 is a three-dimensional diagram of the connecting element 1;

[0030] Figure 3 is a cross-sectional view of the connecting element 1;

[0031] Figure 4 A schematic flow chart of a method for connecting parts in one embodiment;

[0032] Figure 5 Another schematic diagram of connecting aluminum parts and steel parts;

[0033] Figure 6 is a three-dimensional diagram of the connecting element 4;

[0034] Figure 7 is a cross-sectional view of the connecting element 4;

[0035] Figure 8 Another schematic flow chart of a method for connecting parts in one embodiment;

[0036] Fig. 9 It is the top view of the connection joint specimen;

[0037] Fig.10 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] One of the hot technologies for achieving lightweight in the current industry is integrated die-casting aluminum alloy technology. On the one hand, aluminum alloy materials are lighter than steel plates, with a density of only 1 / 3 of that of steel, making them one of the preferred materials for lightweighting automobiles; secondly, the use of integrated die-casting technology can integrate the design of body parts, simplify the overall production process, and improve the production efficiency of new energy vehicle bodies; thirdly, the use of aluminum alloy die-casting structural parts can improve the rigidity of the entire vehicle, thereby improving driving controllability. Based on the above advantages, the application of integrated die-casting aluminum alloy structural parts in automobiles is becoming more and more common.

[0040] As mentioned above, the application of aluminum parts in automobiles inevitably involves the connection between aluminum parts and steel parts. The existing mechanical connection process to complete the connection between the two, such as self-piercing riveting technology (SPR) and flow drill screws (FDS), requires riveting equipment to replace the existing spot welding equipment, which will mean a large number of production line modifications, and even the establishment of a proprietary steel-aluminum hybrid production line, which will bring great challenges and huge investments to enterprises. Therefore, it is necessary to develop a process suitable for steel-aluminum connection without modifying the existing production line, thereby reducing the cost of steel-aluminum connection.

[0041] Based on this, refer to Figure 1 The present application provides a connecting element 1, which is an integrally formed structure with an aluminum part 2, and is connected to a part connection of a steel part 3; the integrally formed structure is formed by placing the connecting element 1 at a target position in a die-casting cavity, and then die-casting the aluminum material corresponding to the aluminum part 2 and located in the die-casting cavity.

[0042] The aluminum material can be a solution containing aluminum. The aluminum material is die-cast to form a solid aluminum part 2. After the connecting element 1 is placed at the target position in the die-casting cavity, the aluminum material is poured into the die-casting cavity. The aluminum material in the die-casting cavity is die-casted to form a structure in which the aluminum part 2 wraps the connecting element 1. This structure is the above-mentioned one-piece forming structure.

[0043] The connecting element 1 and the aluminum part 2 are an integrally formed structure, which means that the connecting element 1 and the aluminum part 2 form a whole, and the connecting element 1 and the aluminum part 2 must be connected.

[0044] The connecting element 1 located at the target position is also connected to the part connection of the steel part 3 .

[0045] In this embodiment, the target position can be any position in the die-casting cavity, and the part connection can also be set arbitrarily.

[0046] Alternatively, the connection point position of the aluminum part and the steel part can be set (the connection point position refers to the position of the connection point after the aluminum part and the steel part are connected by the connection element), and the target position is determined based on the connection point position, and the part connection of the steel part is determined based on the connection point position, so that the connection element is placed at the target position in the die-casting cavity and then die-casted, and the aluminum part and the steel part are connected through the connection element located at the target position, so that the aluminum part and the steel part are connected at the connection point position. In the embodiment of the present application, the one-piece structure can also be called a cast aluminum plate, the steel part can also be called a steel plate, and the connection element can also be called a connection joint.

[0047] In this embodiment, after placing the connecting element 1 at the target position in the die-casting cavity, the aluminum material corresponding to the aluminum part 2 and located in the die-casting cavity is die-casted to form an integral structure. The integral structure refers to an integral structure including the connecting element 1 and the aluminum part 2. In this way, the aluminum part 2 can be connected to the connecting element 1, and then the connecting element 1 is connected to the part connection of the steel part 3. In this way, the connection between the aluminum part 2 and the steel part 3 can be achieved. Compared with the existing solution, there is no need to modify the production line in large quantities, and the connection between the aluminum part 2 and the steel part 3 is also achieved, thereby reducing the connection cost of the aluminum part 2 and the steel part 3.

[0048] In one embodiment, the connecting element 1 is a dumbbell-shaped structure; the dumbbell-shaped structure is connected to the part connection of the steel part 3 by an electric welding process.

[0049] By welding the electrodes of the connecting element 1 to the surrounding steel parts 3 using conventional steel resistance welding technology, a reliable connection between the aluminum part 2 and the steel part 3 can be achieved without modifying the existing production line.

[0050] Reference Figure 2 and Figure 3 , Figure 2 is a three-dimensional diagram of the connecting element 1, Figure 3 is a cross-sectional view of a connecting element 1. In one embodiment, the connecting element 1 includes a first cylindrical element 11 and two second cylindrical elements 12. The two second cylindrical elements 12 are respectively arranged at two ends of the first cylindrical element 11. The diameter of the arc surface at both ends of the first cylindrical element 11 is greater than the diameter of the central arc surface of the first cylindrical element 11. Figure 3 As shown, the diameter of the arc surface at both ends of the first cylindrical element 11 is D, the diameter of the central arc surface of the first cylindrical element 11 is d, and the height of the connecting element 1 is h. The diameter of the second cylindrical element 12 matches the diameter of the arc surface at both ends of the first cylindrical element 11; the height of the second cylindrical element 12 is less than the height of the first cylindrical element 11.

[0051] In this embodiment, the two second cylindrical elements 12 are respectively arranged at the two ends of the first cylindrical element 11, and the first cylindrical element 11 and the two second cylindrical elements 12 are integrally formed to constitute the connecting element 1. The diameter of the arc surface at both ends of the first cylindrical element 11 is D, and the diameter of the central arc surface of the first cylindrical element 11 is d, D=d+xmm, and x can be 2 or 3.

[0052] The diameter of the second cylindrical element 12 is D, which is the same as the diameter of the arc surfaces at both ends of the first cylindrical element 11 .

[0053] The height h of the connecting element 1 = 2*the height of the second cylindrical element 12 + the height of the first cylindrical element 11 .

[0054] In this embodiment, the diameter D of the arc surfaces at both ends of the first cylindrical element 11 is set to be larger than the diameter d of the central arc surface of the first cylindrical element 11, and the diameter D of the second cylindrical element 12 is the same as the diameter D of the arc surfaces at both ends of the first cylindrical element 11, in order to ensure that the electrode cap (the diameter of the electrode cap is d) does not touch the aluminum part 2 during the spot welding process.

[0055] In this embodiment, the connecting element 1 is composed of the above-mentioned first cylindrical element 11 and two second cylindrical elements 12, so that the entire element presents a dumbbell-shaped cylindrical structure. This structure can ensure that after the aluminum part 2 is die-cast, there is a reliable connection strength between the connecting element 1 and the aluminum part 2 body.

[0056] See again Figure 1 In one embodiment, the aluminum part 2 includes a first connecting end 21 and a second connecting end 22, both of which are connected to the connecting element 1, and the height of the first connecting end 21, the height of the second connecting end 22 and the height of the connecting element 1 are the same.

[0057] The aluminum part 2 is connected to one end of the connecting element 1 through the first connecting end 21, and the aluminum part 2 is connected to the other end of the connecting element 1 through the second connecting end 22. The height of the connecting element 1 is the same as the height of the first connecting end 21, the height of the connecting element 1 is the same as the height of the second connecting end 22, and the height of the first connecting end 21 is also the same as the height of the second connecting end 22.

[0058] In one embodiment, Figure 4 As shown, a method for connecting parts is provided. This embodiment uses the method applied to a part connecting device as an example. In this embodiment, the method includes the following steps:

[0059] Step 402: After placing the connecting element at the target position in the die-casting cavity, die-casting is performed on the aluminum material corresponding to the aluminum part and located in the die-casting cavity to form an integrally formed structure.

[0060] After the part connecting device automatically places the connecting element at the target position, the aluminum material is poured into the die-casting cavity, and then the aluminum material is die-cast to form an aluminum part, and at this time the aluminum part and the connecting element form an integral structure.

[0061] The connecting element in this embodiment is the above Figures 1 to 3 The connecting elements in the corresponding embodiment.

[0062] Step 404: Connect the connecting element to the part connection of the steel part.

[0063] The part connecting device connects the connecting element to the part connection of the steel part by a spot welding process.

[0064] In this embodiment, after placing the connecting element at the target position, the aluminum material corresponding to the aluminum part and located in the die-casting cavity is die-cast to form an integrated structure, so that the connecting element can be connected to the aluminum part, and then the connecting element is connected to the part connection of the steel part to achieve the connection between the aluminum part and the steel part. Compared with the existing solution, it does not require a large number of production line modifications, and the connection between the aluminum part and the steel part is achieved, thereby reducing the connection cost of the aluminum part and the steel part.

[0065] Reference Figure 5 The present application also provides a connecting element 4, which is connected to the aluminum part 5 through a prefabricated hole on the aluminum part 5, and the connecting element 4 is connected to the part connection of the steel part 6; the aluminum part 5 is obtained by die-casting the aluminum material; the position of the prefabricated hole corresponds to the part connection; the depth of the prefabricated hole matches the height of the connecting element 4; the height of the connecting element 4 matches the height of the aluminum part 5.

[0066] The position of the connection point between the steel part 6 and the aluminum part 5 can be customized. The connection point has a corresponding part connection in the steel part 6 and also has a corresponding part connection in the aluminum part 5. The part connection in the aluminum part 5 is the prefabricated hole position.

[0067] The aluminum material may be a solution containing aluminum. The aluminum material is poured into a die-casting cavity, and the aluminum material in the die-casting cavity is die-casted to form a solid aluminum part 5 .

[0068] The connecting element 4 and the prefabricated hole adopt a small interference fit, and the connecting element 4 is placed in the prefabricated hole to achieve the connection between the connecting element 4 and the aluminum part 5.

[0069] The prefabricated holes on the aluminum part 5 can be obtained by drilling the aluminum part 5 through machining after the positions of the prefabricated holes are determined.

[0070] In this embodiment, after the aluminum material is die-cast to obtain the aluminum part 5, the connecting element 4 is connected to the aluminum part 5 through the prefabricated hole on the aluminum part 5, and the depth of the prefabricated hole is set to match the height of the connecting element 4, and the height of the connecting element 4 matches the height of the aluminum part 5, so that the connecting element 4 and the aluminum part 5 are reliably connected. At the same time, the connecting element 4 is also connected to the part connection of the steel part 6, thereby realizing the connection between the steel part 6 and the aluminum part 5. Compared with the existing solution, it does not require a large number of production line modifications, and also realizes the connection between the aluminum part 5 and the steel part 6, reducing the connection cost of the aluminum part 5 and the steel part 6.

[0071] In one embodiment, the connecting element 4 is a semi-dumbbell-shaped structure; the end surface of the semi-dumbbell-shaped structure is connected to the part connection of the steel part 6 by electric welding.

[0072] In one embodiment, the connecting element 4 is a semi-dumbbell-shaped structure; the semi-dumbbell-shaped structure is connected to the part connection of the steel part 6 by an electric welding process.

[0073] By welding the electrodes of the connecting element 4 to the surrounding steel parts 6 using a conventional steel resistance welding process, a reliable connection between the aluminum part 5 and the steel part 6 can be achieved without modifying the existing production line.

[0074] Reference Figure 6 and Figure 7 , Figure 6 is a three-dimensional diagram of the connecting element 4, Figure 7 is a cross-sectional view of the connecting element 4.

[0075] In one embodiment, the connecting element 4 includes a third cylindrical element 41 and a fourth cylindrical element 42 , the diameter of the third cylindrical element 41 is greater than the diameter of the fourth cylindrical element 42 ; the height of the third cylindrical element 41 is less than the height of the fourth cylindrical element 42 .

[0076] The third cylindrical element 41 and the fourth cylindrical element 42 are integrally formed to form the connecting element 4. Figure 7 As shown, the diameter of the third cylindrical element 41 is D, the diameter of the fourth cylindrical element 42 is d1, and the height h of the connecting element 4 = the height of the third cylindrical element 41 + the height of the fourth cylindrical element 42.

[0077] In this embodiment, assuming that the diameter of the spot welding electrode cap is d, the diameter of the fourth cylindrical element 42 at the lower end of the connecting element 4 is d1=d+1mm, and the diameter of the third cylindrical element 41 at the upper end of the element is D=d+3mm.

[0078] In this embodiment, the connecting element 4 presents a half dumbbell-shaped cylindrical structure, which can ensure that after spot welding, there is a reliable connection strength between the connecting element 4 and the main body of the aluminum part 5 .

[0079] As mentioned above, one possible situation in which the height of the connecting element 4 matches the height of the aluminum part 5 is that the cross section of the aluminum part 5 is a quadrilateral, and the height of the connecting element 4 is the same as the width of the quadrilateral;

[0080] Another possible situation in which the height of the connecting element matches the height of the aluminum part 5 is that Figure 5In one embodiment, the aluminum part 5 includes a third connecting end 51 and a fourth connecting end 52, and the third connecting end 51 and the fourth connecting end 52 are both connected to the connecting element 4, and the height of the third connecting end 51, the height of the fourth connecting end 52 and the height of the connecting element 4 are the same.

[0081] The aluminum part 5 is connected to one end of the connecting element 4 through the third connecting end 51, and the aluminum part 5 is connected to the other end of the connecting element 4 through the fourth connecting end 52. The height of the connecting element 4 is the same as the height of the third connecting end 51, the height of the connecting element 4 is the same as the height of the fourth connecting end 52, and the height of the third connecting end 51 is also the same as the height of the fourth connecting end 52.

[0082] In one embodiment, the diameter of the prefabricated hole is related to the diameter of the third cylindrical element 41 and the diameter of the fourth cylindrical element 42 .

[0083] The prefabricated hole and the connecting element 4 adopt a small interference fit, the depth of the prefabricated hole is the same as the height of the connecting element 4, and the connecting element 4 can be completely inserted into the prefabricated hole of the aluminum part 5;

[0084] The diameter of the prefabricated hole needs to match the diameter of the third cylindrical element 41 and the diameter of the fourth cylindrical element 42 . Specifically, the diameter of the prefabricated hole may be slightly larger than the diameter of the third cylindrical element 41 .

[0085] In one embodiment, Figure 8 As shown, a method for connecting parts is provided. This embodiment uses the method applied to a part connecting device as an example. In this embodiment, the method includes the following steps:

[0086] Step 802: Die-cast the aluminum material to obtain an aluminum part.

[0087] The part connecting device injects aluminum material into a die-casting cavity and performs die-casting on the aluminum material to obtain a solid aluminum part.

[0088] Step 804, determining the position of the prefabricated hole in the aluminum part, and setting the prefabricated hole at the determined position;

[0089] The part connection device can set the position of the connection point between the steel part and the aluminum part. The part connection device finds the corresponding part connection in the aluminum part based on the connection point. The part connection in the aluminum part is the prefabricated hole position.

[0090] The part connection device uses machining to design prefabricated holes in aluminum parts.

[0091] Step 806, connecting the connecting element to the aluminum part through the prefabricated hole on the aluminum part;

[0092] The part connecting device automatically inserts the connecting element into the prefabricated hole on the aluminum part, thereby connecting the connecting element to the aluminum part.

[0093] Step 808, connect the connecting element to the part connection of the steel part; the position of the prefabricated hole corresponds to the part connection; the depth of the prefabricated hole matches the height of the connecting element; the height of the connecting element matches the height of the aluminum part.

[0094] The part connecting device finds the corresponding part connection in the steel part based on the above connection points, and connects the connecting element to the part connection of the steel part by spot welding.

[0095] The position of the prefabricated hole and the part connection point both correspond to the same connection point position, so the position of the prefabricated hole corresponds to the part connection point.

[0096] The depth of the prefabricated hole may be the same as the height of the connecting element, so that the connecting element can be completely inserted into the prefabricated hole.

[0097] The height of the connecting element can be the same as the height of the aluminum part.

[0098] In this embodiment, after obtaining an aluminum part by die-casting an aluminum material, the position of a prefabricated hole is determined in the aluminum part, and the prefabricated hole is set at the determined position, and the depth of the prefabricated hole matches the height of the connecting element, and the height of the connecting element matches the height of the aluminum part, so that the connecting element is connected to the aluminum part through the prefabricated hole on the aluminum part, thereby realizing the connection between the connecting element and the aluminum part, and then the connecting element is connected to the part connection of the steel part, thereby realizing the connection between the steel part and the aluminum part. Compared with the existing scheme, it does not require a large number of production line modifications, and also realizes the connection between the aluminum part and the steel part, thereby reducing the connection cost of the aluminum part and the steel part.

[0099] A specific implementation scenario 1 of the parts connection method of this application is as follows:

[0100] 1. Selection of materials.

[0101] Steel plate: size 30mm*100mm, thickness 1.5mm.

[0102] Cast aluminum plate: size 30mm*100mm, thickness 3.0mm.

[0103] 2. Clean the steel plate surface.

[0104] At room temperature, the steel plate was immersed in acetone solution for 2 minutes, taken out and blown dry.

[0105] 3. Sample connection.

[0106] Fig. 9 The connection point between the steel plate and the cast aluminum plate is the area within the dotted line range on the end surface where the connection element 1 contacts the steel part 3, as shown in Figure 1. Fig. 9 shown.

[0107] 4. Performance testing.

[0108] The tensile performance test of the connection joint was carried out to test the shear resistance of the joint. Before the tensile test, gaskets of corresponding thickness were placed on both ends of the connection sample to avoid stress in the peeling direction during the tensile test, which would affect the test results. After testing, the shear resistance of the joint was 7.1kN.

[0109] 5. Parts connection.

[0110] According to the product digital model, the connection points between the cast aluminum plate and the steel plate are prefabricated by machining.

[0111] The prefabricated hole is located on the cast aluminum plate, and a small interference fit is adopted between the connecting element and the prefabricated hole. After the prefabricated hole, the connecting element is placed and fixed in the prefabricated hole, and the height of the connecting element is ensured to be flush with the cast aluminum plate. Then, the traditional conventional steel spot welding process is adopted at the connection point position of the steel plate and the connecting element to form a reliable connection between the steel plate and the cast aluminum plate.

[0112] Another specific implementation scenario 2 of the parts connection method of the present application is as follows:

[0113] Before die-casting the aluminum parts, steel connecting elements are arranged in advance at the connection points between the aluminum parts and the steel plate parts in the die-casting cavity according to the actual product digital model. The aluminum material is then die-cast to obtain an integrated structure. The connecting elements in the integrated structure can be reliably connected to the surrounding steel plate parts by conventional resistance welding, and the die-cast aluminum alloy structural parts can be used on vehicles without modifying the existing production lines.

[0114] The size of the aluminum part obtained by die casting is 100mm*300mm, and the thickness is 3.0mm. The height of the connecting element is the same as the thickness of the aluminum part. After that, the die-cast sheet is wire-cut according to the size of the mechanical performance test sample. The material selection, surface cleaning, sample connection and performance test method are the same as those in Scenario 1. After testing, the shear strength of the joint is 7.4kN.

[0115] It can be seen that the present application arranges steel connecting elements in advance at the connection point between aluminum parts and steel parts in the die-casting cavity according to the actual product digital model before die-casting, and then performs die-casting of the parts after the arrangement. Conventional resistance welding is used to connect the connecting elements and the surrounding steel plate parts, thereby realizing a reliable connection between aluminum parts and steel parts. Alternatively, after the aluminum parts are formed, prefabricated holes are made at the connection point of the parts according to the product digital model, and then the steel connecting elements are set at the prefabricated holes, and then the connecting elements and the steel parts are conventionally spot-welded to form a reliable connection between the aluminum parts and the steel parts. Through this method, the application of die-cast aluminum alloy structural parts on the vehicle can be realized on the traditional steel body production line, without the need for additional investment in SPR and FDS riveting equipment and the transformation of the corresponding production line, thus saving production costs.

[0116] At the same time, unlike SPR and FDS, this application is not limited by the strength of the steel plate and can still achieve reliable connection for ultra-high-strength steel or hot-formed steel parts, thus effectively broadening the application scope of high-strength steel and aluminum alloys.

[0117] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0118] Based on the same inventive concept, the embodiment of the present application also provides a parts connection device for implementing the parts connection method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more parts connection method device embodiments provided below can refer to the limitations on the parts connection method above, and will not be repeated here.

[0119] In an exemplary embodiment, a parts connection device is provided, comprising:

[0120] A first processing module is used to place the connecting element at a target position in the die-casting cavity, and then perform die-casting on the aluminum material corresponding to the aluminum part and located in the die-casting cavity to form an integrated structure;

[0121] The first connecting module is used to connect the connecting element to the part connection of the steel part.

[0122] In an exemplary embodiment, a parts connection device is also provided, comprising:

[0123] The second processing module is used to perform die-casting on the aluminum material to obtain aluminum parts;

[0124] A setting module, used for determining the position of the prefabricated hole in the aluminum part and setting the prefabricated hole at the determined position;

[0125] a second connection module, used to connect the connection element to the aluminum part through a prefabricated hole on the aluminum part;

[0126] A third connection module is used to connect the connection element to the part connection of the steel part; the position of the prefabricated hole corresponds to the part connection;

[0127] The depth of the prefabricated hole matches the height of the connecting element; and the height of the connecting element matches the height of the aluminum part.

[0128] Each module in the above-mentioned parts connection device can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each module.

[0129] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Fig.10As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a method for connecting parts is implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0130] Those skilled in the art will understand that Fig.10 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0131] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0132] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0133] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0134] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0135] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0136] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0137] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A connecting element, characterized in that: The connecting element and the aluminum part are an integrally formed structure, and the connecting element is connected to the part connection of the steel part; The integrally formed structure is formed by placing the connecting element at a target position in a die-casting cavity and then die-casting the aluminum material corresponding to the aluminum part and located in the die-casting cavity.

2. The connecting element according to claim 1, characterized in that The connecting element is a dumbbell-shaped structure; the dumbbell-shaped structure is connected to the part connection of the steel part through a spot welding process.

3. The connecting element according to claim 2, characterized in that The connecting element comprises a first cylindrical element and two second cylindrical elements, wherein the two second cylindrical elements are respectively arranged at two ends of the first cylindrical element; The diameters of the arc surfaces at both ends of the first cylindrical element are larger than the diameter of the central arc surface of the first cylindrical element; The diameter of the second cylindrical element matches the diameter of the arc surfaces at both ends of the first cylindrical element; and the height of the second cylindrical element is smaller than the height of the first cylindrical element.

4. The connecting element according to any one of claims 1 to 3, characterized in that The aluminum part includes a first connecting end and a second connecting end, the first connecting end and the second connecting end are both connected to the connecting element, and the height of the first connecting end, the height of the second connecting end and the height of the connecting element are the same.

5. A connecting element, characterized in that: The connecting element is connected to the aluminum part through a prefabricated hole on the aluminum part, and the connecting element is connected to the part connection of the steel part; the aluminum part is obtained by die-casting the aluminum material; the position of the prefabricated hole corresponds to the part connection; the depth of the prefabricated hole matches the height of the connecting element; the height of the connecting element matches the height of the aluminum part.

6. The connecting element according to claim 5, characterized in that The connecting element is a semi-dumbbell-shaped structure; the semi-dumbbell-shaped structure is connected to the part connection of the steel part through an electric welding process.

7. The connecting element according to claim 6, characterized in that The connecting element comprises a third cylindrical element and a fourth cylindrical element, the diameter of the third cylindrical element is greater than the diameter of the fourth cylindrical element; the height of the third cylindrical element is less than the height of the fourth cylindrical element.

8. The connecting element according to claim 7, characterized in that The aluminum part includes a third connecting end and a fourth connecting end, wherein the third connecting end and the fourth connecting end are both connected to the connecting element, and the height of the third connecting end, the height of the fourth connecting end and the height of the connecting element are the same.

9. A parts connection method, characterized in that: The method comprises: After placing the connecting element at a target position in the die-casting cavity, die-casting the aluminum material corresponding to the aluminum part and located in the die-casting cavity to form an integrally formed structure; The connecting element is connected to the part connection of the steel part.

10. A parts connection method, characterized in that: The method comprises: Aluminum parts are obtained by die-casting aluminum materials; Determining the position of the prefabricated hole in the aluminum part, and setting the prefabricated hole at the determined position; Connecting the connecting element to the aluminum part through the prefabricated hole on the aluminum part; Connecting the connecting element to the part connection of the steel part; the position of the prefabricated hole corresponds to the part connection; The depth of the prefabricated hole matches the height of the connecting element; and the height of the connecting element matches the height of the aluminum part.

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