Friction stir welding device and method applied to die casting, medium and equipment

Abstract

The invention provides a friction stir welding device and method applied to a die casting, a medium and equipment. A supporting table and a stirring head are arranged; wherein the stirring head is of a hemispherical structure, and the stirring head is inclined relative to the surfaces of the first material and the second material and is inclined to the retreating side of the stirring head; the stirring head of the friction stir welding device is designed to be of a hemispherical structure, so that the insertion depth of the stirring head can be accurately controlled, the formation of groove-shaped features and internal holes is effectively reduced, the welding quality and effect are improved, and the stirring head is designed to be inclined to the surfaces of a first material and a second material and inclined to the retreating side of the stirring head, so that the welding quality is improved. The stirring head can more effectively push an upper-layer material to the backward side during welding, it is ensured that the material flows more uniformly in a stirring area, surface defects possibly caused in the stirring process are reduced, meanwhile, the contact area between the stirring head and the material can be reduced, and therefore heat input is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of friction stir welding, and in particular to a friction stir welding device, method, medium and equipment applied to die castings. Background Art

[0002] In the field of modern industrial manufacturing, the connection of dissimilar materials (such as aluminum alloy and steel) has become a core demand of many high-tech industries, especially in the application of lightweight structures such as aerospace and automobile manufacturing. Aluminum alloys are widely used due to their light weight and strong corrosion resistance, while steel occupies an important position in key structural parts due to their high strength and wear resistance. However, due to the huge differences in physical and chemical properties between aluminum alloys and steel, traditional welding technology is difficult to form high-quality and stable welded joints between them. Stir friction welding technology is to locally heat the material to a plastic state through the friction heat generated by the stirring head, and then mix the materials through mechanical stirring to achieve solid-state welding of dissimilar materials. This welding technology avoids the complete melting of the material and significantly reduces the formation of intermetallic compounds. Therefore, it has certain application prospects in the welding of dissimilar materials. However, the existing stir friction welding tools are prone to produce hook-like features and internal voids due to improper control of the insertion depth during welding, thereby affecting the welding quality. Therefore, there is an urgent need for a device and method that can improve the quality of stir friction welding. Summary of the invention

[0003] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide a friction stir welding device, method, medium and equipment applied to die castings.

[0004] According to one aspect of the present application, a friction stir welding device for die castings is provided, comprising: a support table, the support table is used to place a first material and a second material to be welded, the welding parts of the first material and the second material are placed overlapping, and the first material and the second material are heterogeneous materials; a stirring head, the stirring head is a hemispherical structure, the head radius of the stirring head is half of the shoulder diameter, the stirring head is inclined to the surfaces of the first material and the second material, and tends to the rear side of the stirring head.

[0005] In one embodiment, the inclination angle between the stirring head and the surfaces of the first material and the second material is 3 degrees.

[0006] In one embodiment, the head radius of the stirring head is 7.5 mm, and the shoulder diameter of the stirring head is 15 mm.

[0007] In one embodiment, the probe length of the stirring head is 2.1 mm, and the probe diameter of the stirring head is 6 mm.

[0008] In one embodiment, the rotation speed of the stirring head is 900 rpm.

[0009] In one embodiment, the welding speed of the stirring head is 50 mm / min.

[0010] According to another aspect of the present application, a friction stir welding method applied to die castings is provided, using any of the friction stir welding devices described above for die castings, the friction stir welding method applied to die castings comprising: controlling the rotation of the stirring head to penetrate into the welding part of the first material and the second material; and controlling the operating parameters of the stirring head according to the heat generated by the friction between the stirring head and the welding part.

[0011] In one embodiment, the operating parameters of the stirring head are controlled according to the heat generated by the friction between the stirring head and the welding part, including: if the heat generated by the friction between the stirring head and the welding part is higher than a preset heat threshold, reducing the rotation speed or welding speed of the stirring head.

[0012] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the storage medium stores a computer program, and the computer program is used to execute any of the above methods.

[0013] According to another aspect of the present application, an electronic device is provided, comprising: a processor; a memory for storing instructions executable by the processor; and the processor is used to execute any of the above-described methods.

[0014] The present application provides a friction stir welding device, method, medium and equipment for die castings, which are provided by setting a support table and a stirring head; wherein the support table is used to place a first material and a second material to be welded, the welding parts of the first material and the second material are superimposed, the first material and the second material are heterogeneous materials, the stirring head is a hemispherical structure, the head radius of the stirring head is half of the shoulder diameter, the stirring head is inclined to the surface of the first material and the second material, and tends to the retreat side of the stirring head; that is, the stirring head of the friction stir welding device is designed to be a hemispherical structure, and the head radius of the stirring head is half of the shoulder diameter, so that the insertion depth of the stirring head can be accurately controlled so that the stirring head only slightly contacts the welding The surface of part of the lower material is stirred without going deep into it, thereby effectively reducing the formation of groove features and internal holes to improve the welding quality and effect. In addition, by designing the stirring head to be inclined with the surface of the first material and the second material and inclined to the retreat side of the stirring head, the stirring head can more effectively push the upper material to the retreat side during welding, ensuring that the material flows more evenly in the stirring zone, helping to reduce voids and discontinuities in the weld joint, making the weld more uniform, reducing welding defects, ensuring that the contact surface between the stirring head and the material during welding is smoother, and reducing surface defects that may be caused during the stirring process. At the same time, it can also help reduce the contact area between the stirring head and the material, thereby reducing heat input. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0016] Figure 1 It is a schematic structural diagram of a friction stir welding device applied to a die casting provided by an exemplary embodiment of the present application.

[0017] Figure 2 It is a schematic flow chart of a friction stir welding method applied to die castings provided by an exemplary embodiment of the present application.

[0018] Figure 3 It is a structural diagram of an electronic device provided by an exemplary embodiment of the present application.

[0019] Explanation of the reference numerals: 1. support platform; 2. first material; 3. second material; 4. stirring head; 10. electronic device; 11. processor; 12. memory; 13. input device; 14. output device. DETAILED DESCRIPTION

[0020] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0021] Figure 1 FIG. 1 is a schematic diagram of a friction stir welding device for die castings provided by an exemplary embodiment of the present application. Figure 1 As shown, the friction stir welding device applied to die castings comprises: a support table 1, a first material 2, a second material 3 and a stirring head 4; wherein the support table 1 is used to place the first material 2 and the second material 3 to be welded, the welding parts of the first material 2 and the second material 3 are superimposed and placed, the first material 2 and the second material 3 are heterogeneous materials, the stirring head 4 is a hemispherical structure, the head radius of the stirring head 4 is half of the shoulder diameter, the stirring head 4 is inclined to the surfaces of the first material 2 and the second material 3, and is inclined to the retreat side of the stirring head 4 ( Figure 1 WD direction shown in ). The first material 2 and the second material 3 in the present application are heterogeneous materials, for example, the first material 2 is an iron material (Fe) and the second material 3 is an aluminum material (Al). By designing a hemispherical structure of the stirring head 4, the contact area between the stirring head 4 and the first material 2 and the second material 3 is reduced, thereby reducing the heat generated during the welding process, and then effectively controlling the thickness of the intermetallic compound (IMC) layer, keeping the thickness of the IMC at the nanometer level (for example, 2-2.5 nanometers), thereby avoiding the brittleness problem caused by the excessive thickness of the IMC layer during welding; and the hemispherical structure of the stirring head 4 can accurately control its insertion depth and stirring mode, so that the stirring head 4 only slightly contacts the surface of the second material 3 (lower material) without deeply stirring the second material 3, thereby effectively reducing the formation of hook-like features and internal voids.

[0022] The present application provides a friction stir welding device for die castings, which is provided with a support platform and a stirring head; wherein the support platform is used to place a first material and a second material to be welded, the welding parts of the first material and the second material are placed superimposed, the first material and the second material are heterogeneous materials, the stirring head is a hemispherical structure, the head radius of the stirring head is half of the shoulder diameter, the stirring head is inclined to the surface of the first material and the second material, and tends to the retreat side of the stirring head; that is, the stirring head of the friction stir welding device is designed to be a hemispherical structure, and the head radius of the stirring head is half of the shoulder diameter, so that the insertion depth of the stirring head can be accurately controlled so that the stirring head only slightly contacts the lower layer of the welding part. The surface of the material instead of penetrating deeply can effectively reduce the formation of groove features and internal holes to improve the welding quality and effect, and by designing the stirring head and the surface of the first material and the second material to be inclined and inclined to the retreat side of the stirring head, the stirring head can more effectively push the upper material to the retreat side during welding, ensuring that the material flows more evenly in the stirring zone, helping to reduce voids and discontinuities in the weld joint, making the weld more uniform, reducing welding defects, ensuring that the contact surface between the stirring head and the material during welding is smoother, and reducing surface defects that may be caused during the stirring process. At the same time, it can also help reduce the contact area between the stirring head and the material, thereby reducing heat input.

[0023] In one embodiment, if Figure 1 As shown, the inclination angle between the stirring head 4 and the surfaces of the first material 2 and the second material 3 is 3 degrees.

[0024] The present application designs the inclination angle between the stirring head 4 and the surface of the first material 2 and the second material 3 to be 3 degrees (such as Figure 1 The angle shown α), can optimize the fluidity of the material during welding. The inclination angle enables the stirring head 4 to push the first material 2 to the retreat side more effectively during welding, while ensuring that the material flows more evenly in the stirring zone, which helps to reduce voids and discontinuities in the welded joint. By enhancing the plastic flow of the material, the inclination angle ensures that the material moves from the forward side to the retreat side, making the weld more uniform and reducing welding defects. In addition, the inclination angle can also help reduce the contact area between the stirring head 4 and the first material 2 and the second material 3, thereby reducing heat input. Since the hemispherical stirring head 4 itself already has a small contact area, a proper inclination angle can further reduce heat generation, prevent excessive heat-affected zones, control the generation of intermetallic compounds (IMC), and maintain higher mechanical properties of the weld. The inclination angle can also reduce the wear of the stirring head 4 by optimizing the contact mode between the stirring head 4 and the first material 2 and the second material 3. With the help of the inclination angle, the hemispherical stirring head 4 can avoid vertical friction with the surface of the first material 2 and the second material 3, thereby reducing fatigue and wear of the stirring head 4, which not only improves welding efficiency, but also significantly extends the service life of the stirring head 4. By controlling the inclination angle, the stirring head 4 can generate finer equiaxed crystals, thereby improving the uniformity of the microstructure of the weld joint and ultimately improving the mechanical properties of the weld joint.

[0025] In one embodiment, the radius of the head of the stirring head is 7.5 mm, and the diameter of the shoulder of the stirring head is 15 mm.

[0026] If the head radius of the stirring head 4 is too small, it will cause serious wear of the stirring head 4 and low friction efficiency, while if the head radius of the stirring head 4 is too large, the contact area between the stirring head 4 and the first material 2 and the second material 3 will be too large. Therefore, the present application sets the head radius of the stirring head 4 to 7.5 mm and the shoulder diameter of the stirring head 4 to 15 mm, thereby ensuring the wear condition, heat generation, etc. of the stirring head 4 while ensuring the welding efficiency.

[0027] In one embodiment, the probe length of the stirring head is 2.1 mm, and the probe diameter of the stirring head is 6 mm.

[0028] If the probe length of the stirring head 4 is too long, the probe will be easy to bend and it will be difficult to control the pressure on the welding material, while if the probe length of the stirring head 4 is too short, the insertion depth will be insufficient, thus affecting the welding quality; if the probe diameter of the stirring head 4 is too small, the probe will be easy to bend and it will be difficult to control the pressure on the welding material, while if the probe diameter of the stirring head 4 is too large, the insertion depth will be insufficient, thus affecting the welding quality. Therefore, the present application sets the probe length of the stirring head 4 to 2.1 mm and the probe diameter of the stirring head 4 to 6 mm to take into account various aspects of welding quality.

[0029] In one embodiment, the rotation speed of the stirring head is 900 rpm.

[0030] If the rotation speed of the stirring head 4 is too fast, it will cause high heat generation and severe wear, while if the rotation speed of the stirring head 4 is too slow, it will lead to low welding efficiency and limited welding quality. Therefore, this application sets the rotation speed of the stirring head 4 to 900 rpm to take into account the heat generation, efficiency and quality during the welding process.

[0031] In one embodiment, the welding speed of the stirring head is 50 mm / min.

[0032] If the welding speed of the stirring head 4 is too fast, it will cause serious wear and high heat generation of the stirring head 4, while if the welding speed of the stirring head 4 is too slow, it will affect the welding efficiency and quality. Therefore, this application sets the welding speed of the stirring head 4 to 50 mm / min to take into account the heat generation, efficiency and quality during the welding process.

[0033] Figure 2 1 is a schematic flow chart of a friction stir welding method for die castings provided by an exemplary embodiment of the present application. The friction stir welding method for die castings adopts any of the above-mentioned friction stir welding devices for die castings, such as Figure 2 As shown, the friction stir welding method applied to die castings includes the following steps: Step 210: Control the stirring head to rotate to penetrate into the welding portion of the first material and the second material.

[0034] The present application performs preparation work before welding, for example, SPCC steel is selected as the lower plate material (first material 2) with a thickness of 1.2 mm, and aluminum alloy AA6061-T6 is selected as the upper plate material (second material 3) with a thickness of 2 mm, and the surface of the welding material is cleaned to remove oxides and impurities to ensure a good welding effect, and then the hemispherical stirring head 4 of the present application is installed to complete the pre-welding preparation work. At the beginning of welding, the stirring head 4 is controlled to rotate and insert into the welding part of the first material 2 and the second material 3, specifically, to penetrate into the second material 3 and reach the surface of the first material 2 to weld the first material 2 and the second material 3.

[0035] Step 220: Control the operating parameters of the stirring head according to the heat generated by the friction between the stirring head and the welding part.

[0036] During the welding process, the present application calculates the heat generated by the friction between the stirring head 4 and the welding part, and controls the operating parameters of the stirring head 4 based on the heat to ensure that the heat generated during the welding process is controlled within a reasonable range, thereby ensuring the welding quality and effect.

[0037] The present application provides a friction stir welding method for die castings, which comprises setting a support table and a stirring head; the support table is used to place a first material and a second material to be welded, the welding parts of the first material and the second material are stacked, the first material and the second material are heterogeneous materials, the stirring head is a hemispherical structure, the head radius of the stirring head is half of the shoulder diameter, the stirring head is inclined to the surfaces of the first material and the second material, and tends to the retreat side of the stirring head, the stirring head is controlled to rotate to penetrate into the welding part of the first material and the second material, and the operating parameters of the stirring head are controlled according to the heat generated by the friction between the stirring head and the welding part; that is, the stirring head of the friction stir welding device is designed to be a hemispherical structure, and the head radius of the stirring head is half of the shoulder diameter, so that the stirring head can be accurately controlled The insertion depth of the stirring head is such that the stirring head only lightly contacts the surface of the lower material of the welding part without going deep, thereby effectively reducing the formation of groove features and internal holes to improve the welding quality and effect. In addition, by designing the stirring head to be inclined to the surfaces of the first material and the second material and inclined to the retreat side of the stirring head, the stirring head can more effectively push the upper material to the retreat side during welding, ensuring that the material flows more evenly in the stirring zone, helping to reduce voids and discontinuities in the weld joint, making the weld more uniform, reducing welding defects, ensuring that the contact surface between the stirring head and the material during welding is smoother, and reducing surface defects that may be caused during the stirring process. At the same time, it can also help reduce the contact area between the stirring head and the material, thereby reducing heat input.

[0038] In one embodiment, the specific implementation of the above step 220 may be: if the heat generated by the friction between the stirring head and the welding part is higher than a preset heat threshold, the rotation speed of the stirring head or the welding speed is reduced.

[0039] Specifically, if the heat generated by the friction between the stirring head 4 and the welding part is too high, the rotation speed or welding speed of the stirring head 4 (i.e., the feeding speed of the stirring head 4) is reduced to reduce the heat generated by the friction between the stirring head 4 and the welding part, thereby ensuring the welding quality and the service life of tools such as the stirring head 4.

[0040] In one embodiment, the heat generated by the friction between the stirring head 4 and the welding part can be calculated using the following formula: ; in, , , ; in, is the rotation speed of the stirring head (rad / s), is the friction coefficient, is the axial pressure exerted by the stirring head on the workpiece. are the outer diameter of the shoulder and the root radius of the mixing head, is the root radius of the stirring needle, is the semi-cone angle of the stirring needle, is the length of the stirring needle, is the root radius of the mixing head, is the height from the root to the top of the stirring needle, is the thermal efficiency of plastic deformation, is the equivalent stress, is the plastic strain rate.

[0041] Optionally, the present application can periodically calculate the input heat generated during the welding process, and determine its calculation cycle based on the difference between the welding area temperature and a reasonable range boundary value (such as an upper limit value). Specifically, the calculation cycle can be positively correlated with the difference, that is, the smaller the difference between the welding area temperature and the upper limit value, the smaller the calculation cycle, so that the welding process can be monitored more flexibly.

[0042] Optionally, the present application can also be controlled by calculating the rate of change of the difference between the temperature of the welding area and the boundary value of the reasonable range. Specifically, the rate of change is positively correlated with the adjustment range of the operating parameters of the stirring head. That is, the greater the rate of change of the difference between the temperature of the welding area and the boundary value of the reasonable range (indicating that the temperature of the welding area changes faster at this time), the greater the adjustment range of the operating parameters of the stirring head, thereby enabling a quick response to avoid the temperature of the welding area exceeding the reasonable range due to untimely adjustment.

[0043] Optionally, the present application may select the smaller value of the operating parameters of the stirring head corresponding to the upper limit value of the welding area temperature and the operating parameters of the stirring head corresponding to the upper limit value of the input heat as the operating parameters of the stirring head to ensure that under the current operating parameters, the input heat and the welding area temperature do not exceed the corresponding reasonable range.

[0044] In one embodiment, the specific adjustment method of the operating parameters of the stirring head 4 can be: adjusting the operating parameters to achieve a difference between the first ratio and the second ratio that is less than a preset difference value; wherein the first ratio is the ratio between the input heat value before adjustment and the operating parameter value before adjustment, and the second ratio is the ratio between the input heat value after adjustment and the operating parameter value after adjustment. Preferably, the adjusted operating parameters (such as the rotation speed or welding speed of the stirring head 4) can be calculated using the following formula: ; in, are the input calorie value before adjustment and the input calorie value after adjustment, They are respectively the rotation speed or feed speed before adjustment and the rotation speed or feed speed after adjustment. During the welding process, if the input heat value before adjustment deviates from the above reasonable range, the control system automatically adjusts the rotation speed or feed speed of the stirring head through the above formula to ensure that the input heat is within a reasonable range while taking into account the welding efficiency.

[0045] After welding is completed, the control device automatically stops adjusting and stores the temperature data, heat input and corresponding parameter adjustment records of each stage of the welding process.

[0046] The friction stir welding device and method for die casting provided by the present application have the following advantages: (1) Avoid hook features and internal voids to improve joint strength and reliability.

[0047] The use of a hemispherical stirring head can avoid the generation of defects such as hook features and internal voids, ensuring the integrity and strength of the welded joint. The strength of the welded joint using this method reaches 70%, which is much higher than the welding strength range of traditional tools (usually 50-60%).

[0048] (2) Adapt to various material thicknesses and increase process flexibility.

[0049] The hemispherical stirring head can adapt to different material thicknesses without changing the tool structure, increasing the flexibility of the welding process, improving production efficiency, and reducing downtime and tool replacement costs.

[0050] (3) Enhance material fluidity.

[0051] The hemispherical stirring head can optimize the fluidity of the material during welding through a specific inclination design. The inclination enables the tool to more effectively push the material of the upper plate to the retreat side during welding, while ensuring that the material flows more evenly in the stirring zone. By enhancing the plastic flow of the material, the inclination ensures that the material moves from the forward side to the retreat side, making the weld more uniform and reducing welding defects.

[0052] (4) Improve the surface quality of welded joints.

[0053] The appropriate inclination angle can ensure that the contact surface between the tool head and the material is smoother during the welding process and reduce surface defects that may be caused during the stirring process. The inclination angle can help the tool head maintain uniform pressure distribution during the welding process, avoid overheating or overcooling in local areas, and optimize the surface quality of the welded joint.

[0054] (5) Reduce the occurrence of hook features and cracks.

[0055] Traditional friction stir welding is prone to hook features and solidification cracks when processing dissimilar materials. By setting a certain inclination angle for the hemispherical stirring head, the tool head can better control the insertion depth and material flow pattern, reducing the formation of hook features and the generation of internal cracks (hemispherical friction stir head). The inclination angle helps the hemispherical tool better adapt to the interface between different materials, thereby avoiding uneven stirring between materials and the resulting cracks.

[0056] (6) Reduce tool wear and extend tool life.

[0057] With the help of the inclination angle, the hemispherical stirring head can avoid vertical friction with the workpiece surface, thereby reducing fatigue and wear of the stirring head, which not only improves welding efficiency, but also significantly extends the service life of the stirring head.

[0058] (7) Improve the mechanical properties of welds.

[0059] By controlling the inclination angle, the stirring head can generate finer equiaxed crystals, improve the uniformity of the microstructure of the weld joint, and ultimately improve the mechanical properties of the weld joint. The appropriate inclination angle optimizes the dynamic recrystallization process of the weld area material to generate a more uniform and refined grain structure, thereby enhancing the tensile strength and toughness of the weld joint.

[0060] (8) Reduce heat input and optimize thermal control.

[0061] The inclination angle can also help reduce the contact area of ​​the stirring head, thereby reducing heat input. Since the hemispherical stirring head itself already has a small contact area, the appropriate inclination angle can further reduce heat generation, prevent excessive heat-affected zones, control the formation of intermetallic compounds (IMC), and enable the weld to maintain higher mechanical properties.

[0062] (9) Heat generation is reduced, improving welding accuracy and quality.

[0063] Reducing the amount of heat generated directly reduces the temperature of the welding area, effectively avoiding material damage caused by excessive heat and excessive generation of the IMC layer at the interface. Due to the precise control of temperature, the thickness of the IMC layer is only 2 to 2.5 nanometers, which is thinner than the traditional thickness, thus maintaining good welding strength and toughness and reducing the occurrence of brittleness of the welded joint. By reducing heat generation and reducing welding defects, welding efficiency is improved, energy consumption and material waste are reduced, and production costs are reduced. The temperature changes in the weld area are captured in real time, and the heat calculation module accurately calculates the welding heat based on the monitored temperature data using parameters such as the rotation speed and feed speed of the stirring head. When the actual heat does not match the preset range, the system automatically adjusts the welding parameters. This feedback adjustment ensures that the heat input of the entire welding process is always within the optimal range, thereby greatly improving the accuracy of heat control and preventing local overheating or overcooling. In the process of welding dissimilar materials, excessive heat input will lead to excessive generation of intermetallic compounds, thereby reducing the strength and ductility of the weld. By adjusting the heat input in real time, it is ensured that the heat remains within the preset optimal range, avoiding excessive generation of intermetallic compounds, thereby greatly improving the mechanical properties of the weld. By combining the stirring head design with the feedback control system, the welding equipment can automatically adjust the welding speed and the stirring head rotation speed according to real-time data, ensuring the uniform mixing of materials in the welding area and avoiding welding defects such as pores and cracks caused by uneven heat distribution, thereby improving the overall quality of the weld. Through the automatic feedback control system, the equipment can automatically adjust the rotation speed and feed speed of the stirring head in real time according to the temperature changes and heat calculation results during the welding process. Such adaptive adjustment reduces pauses and manual adjustments during the welding process, thereby improving production efficiency, adapting to a variety of heterogeneous material welding conditions, and improving the continuity and stability of welding.

[0064] (10) Data can be stored and analyzed to facilitate process optimization.

[0065] After each welding is completed, the system automatically saves the temperature data, heat input, rotation speed, feed speed and other information of the welding process. These data can not only be used to analyze the welding results, but also provide a reference for subsequent process improvements. By accurately recording the data of the welding process, the repeatability of the welding process is greatly improved, and the production process is optimized.

[0066] Below, reference Figure 3 The electronic device according to the embodiment of the present application is described. The electronic device may be any one or both of the first device and the second device, or a stand-alone device independent of them, and the stand-alone device may communicate with the first device and the second device to receive the collected input signal from them.

[0067] Figure 3 A block diagram of an electronic device according to an embodiment of the present application is illustrated.

[0068] like Figure 3 As shown, the electronic device 10 includes one or more processors 11 and a memory 12 .

[0069] The processor 11 may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 10 to perform desired functions.

[0070] The memory 12 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, a random access memory (RAM) and / or a cache memory (cache), etc. The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 11 may run the program instructions to implement the methods of the various embodiments of the present application described above and / or other desired functions. Various contents such as input signals, signal components, noise components, etc. may also be stored in the computer-readable storage medium.

[0071] In one example, the electronic device 10 may further include: an input device 13 and an output device 14 , and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0072] When the electronic device is a stand-alone device, the input device 13 may be a communication network connector, which is used to receive the collected input signals from the first device and the second device.

[0073] In addition, the input device 13 may also include, for example, a keyboard, a mouse, and the like.

[0074] The output device 14 can output various information to the outside, including the determined distance information, direction information, etc. The output device 14 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and the like.

[0075] Of course, to simplify, Figure 3 Only some of the components related to the present application in the electronic device 10 are shown, and components such as a bus, an input / output interface, etc. are omitted. In addition, according to specific application situations, the electronic device 10 may also include any other appropriate components.

[0076] In addition to the above-mentioned methods and devices, an embodiment of the present application may also be a computer program product, which includes computer program instructions, which, when executed by a processor, enable the processor to execute the steps of the method according to various embodiments of the present application described in the above-mentioned "Exemplary Method" section of this specification.

[0077] The computer program product may be written in any combination of one or more programming languages ​​to write program codes for performing the operations of the embodiments of the present application, including object-oriented programming languages, such as Java, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0078] In addition, an embodiment of the present application may also be a computer-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed by a processor, the processor executes the steps of the method according to various embodiments of the present application described in the above "Exemplary Method" section of this specification.

[0079] The computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0080] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0081] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0082] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0083] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0084] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A friction stir welding device for die casting, characterized in that: include: A support platform, the support platform is used to place a first material and a second material to be welded, the welding parts of the first material and the second material are placed overlapping, and the first material and the second material are heterogeneous materials; The stirring head is a hemispherical structure, the head radius of the stirring head is half of the shoulder diameter, the stirring head and the surfaces of the first material and the second material are inclined and tend to the retreat side of the stirring head.

2. The friction stir welding device for die casting according to claim 1, characterized in that: The inclination angle between the stirring head and the surfaces of the first material and the second material is 3 degrees.

3. The friction stir welding device for die casting according to claim 1, characterized in that: The head radius of the stirring head is 7.5 mm, and the shoulder diameter of the stirring head is 15 mm.

4. The friction stir welding device for die casting according to claim 1, characterized in that: The probe length of the stirring head is 2.1 mm, and the probe diameter of the stirring head is 6 mm.

5. The friction stir welding device for die casting according to claim 1, characterized in that: The rotation speed of the stirring head is 900 rpm.

6. The friction stir welding device for die casting according to claim 1, characterized in that: The welding speed of the stirring head is 50 mm / min.

7. A friction stir welding method for die castings, characterized in that: The friction stir welding device for die castings according to any one of claims 1 to 6 is used, and the friction stir welding method for die castings comprises: Controlling the stirring head to rotate so as to penetrate into the welding portion of the first material and the second material; The operating parameters of the stirring head are controlled according to the heat generated by the friction between the stirring head and the welding part.

8. The friction stir welding method for die casting according to claim 7, characterized in that: According to the heat generated by the friction between the stirring head and the welding part, controlling the operating parameters of the stirring head includes: If the heat generated by the friction between the stirring head and the welding part is higher than a preset heat threshold, the rotation speed or welding speed of the stirring head is reduced.

9. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and the computer program is used to execute the method according to claim 7 or 8.

10. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the method according to claim 7 or 8.

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