Titanium alloy and aluminum alloy material combined forming process

Abstract

The invention discloses a titanium alloy and aluminum alloy material combination forming process, and belongs to the technical field of aluminum-titanium combination processes, and the titanium alloy and aluminum alloy material combination forming process comprises the steps that a plurality of titanium alloy edge strips are prepared firstly, and then a CNC process is adopted for machining glue pulling grooves in the titanium alloy edge strips; a laser carving machine is used for carrying out laser carving treatment on the groove face of the glue pulling groove of each titanium alloy edge strip, so that small holes which are evenly and tightly distributed are formed in the groove faces of the glue pulling grooves; and then the titanium alloy edgings are placed into a die-casting die, the die-casting die is filled with the molten aluminum material through a die-casting machine, and the molten aluminum material and the titanium alloy edgings placed in the die-casting die are jointly formed in the die-casting die. According to the scheme, tough combination of the titanium / aluminum dissimilar metal is achieved through the laser microstructure, and the efficiency of the die-casting process is improved by more than 5 times compared with that of traditional diffusion welding; the density of the composite material is less than or equal to 4.2 g / cm, and is reduced by more than 35% compared with an all- Therefore, the technical problems of how to optimize the manufacturing process of the titanium alloy middle frame in the 3C industry and how to reduce the manufacturing cost of the titanium alloy middle frame are solved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum-titanium bonding technology, and in particular to a bonding molding process of titanium alloy and aluminum alloy materials. Background Art

[0002] The 3C industry is an information and home appliance industry that integrates the three major technological products of computers, communications and consumer electronics. The "C" in 3C stands for Computer, Communication and Consumer Electronics.

[0003] With the popularization of the 3C industry, as smart phones, home TVs, display screens and other products tend to be thinner and larger; at the same time, more and more users have put forward the requirements of large-format and thin-structured devices. In order to enhance the structural strength, more and more internal or external metal materials are used. In particular, the promotion and application of external metal structures in monitors and other devices has prompted manufacturers to actively or passively study the metallization of external structures on display devices. Moreover, as the part that consumers directly contact visually and tactilely, the requirements for aesthetics, quality and differentiation of external parts are getting higher and higher. At present, the external parts of display devices in the prior art use a variety of materials and a variety of manufacturing methods to express their appearance and enhance their texture. According to different materials and manufacturing methods, the manufacturing cost has increased, and there will also be technical problems such as high manufacturing cost and low texture.

[0004] Generally speaking, when manufacturing a structure for a portable terminal device having external parts and an internal metal bracket, the manufacturer uses metal processing profiles to machine the external frame and the internal structure as one, or manufactures the metal external frame and the internal metal bracket separately and then assembles them. Alternatively, the manufacturer uses a method of integrally die-casting the external frame and the internal metal bracket.

[0005] Based on this, Chinese patent CN104959565A discloses a manufacturing process for a zinc alloy mobile phone middle frame, which includes the following steps: S1, providing a die-casting mold; S2, injecting zinc alloy material into the mold and die-casting to obtain a middle frame blank; S3, cutting the middle frame blank obtained in step S2; S4, sandblasting the middle frame blank obtained in step S3; S5, double-sided polishing the middle frame blank obtained in step S4; S6, electroplating the middle frame blank obtained in step S5 to obtain a finished middle frame. In this patent solution, zinc alloy is used as the base material, and the hardware die-casting process is used to replace the profile machining process in the prior art, and the die-cast product is cut, and the finished middle frame is made by sandblasting, double-sided polishing and electroplating, which greatly reduces the product processing cycle, can effectively improve production efficiency, and reduce material costs, labor costs and equipment utilization.

[0006] However, the titanium alloy middle frame manufacturing process in the 3C industry disclosed in the prior art still has technical problems such as high manufacturing cost and difficult assembly. Specifically, when using metal profiles to perform integrated machining of the external frame and internal structure, there will be problems such as too high requirements for aesthetic appearance, high manufacturing cost, and low productivity. If the metal external frame and the internal metal bracket are manufactured separately and then assembled as a whole; in order to meet the process requirements of parts assembly, it is necessary to reserve engineering errors for each connecting part, which will cause technical problems such as assembly tolerance imbalance, low bonding strength, and high assembly costs. Summary of the invention

[0007] Based on this, it is necessary to provide a titanium alloy and aluminum alloy material combination molding process to address technical issues such as how to optimize the titanium alloy middle frame manufacturing process in the 3C industry and reduce manufacturing costs.

[0008] A titanium alloy and aluminum alloy material combination forming process, comprising the following steps: S1: A plurality of titanium alloy edge strips are prepared in advance, and each titanium alloy edge strip has an edge strip body, an outer molding surface, and an inner processing surface, and then the inner processing surface arranged on the inner side surface of the edge strip body is processed by CNC technology, so that the inner processing surface has a rubber drawing groove and a plurality of limiting structures, and the plurality of limiting structures are distributed in the rubber drawing groove; S2: Use a laser engraving machine to perform laser engraving on the groove surface of the rubber drawing groove provided on each titanium alloy edge strip, so that the groove surface of the rubber drawing groove is made with evenly and closely distributed small holes; S3: placing a plurality of titanium alloy side strips into a die-casting mold, and connecting each of the titanium alloy side strips placed in the mold to each other to form a square frame; S4: starting the die-casting machine, so that the die-casting machine drives the die-casting mold to complete the mold closing, and the molten aluminum material is filled into the die-casting mold through the die-casting machine, so that the molten aluminum material is formed together with the titanium alloy edge strip previously placed in the die-casting mold; S5: After the titanium alloy edge strip and the aluminum alloy raw material are formed in the die-casting mold through the die-casting process, the die-casting machine drives the die-casting mold to open, and the user can take out the formed product.

[0009] Furthermore, in step S2, during laser engraving, a honeycomb micro-hole array with a pore size of 50-200 μm and a pore pitch of 0.3-0.8 mm is planned.

[0010] Furthermore, in step S2, during laser engraving, the depth-to-diameter ratio of each micro-hole in the honeycomb micro-hole array is controlled to be between 1:1 and 3:1.

[0011] Furthermore, in step S2, during laser engraving, the control parameters of the laser engraving machine are: power is 20-50W; pulse frequency is 20-50kHz; scanning speed is 500-1500mm / s; and focus position control amount is Z-axis offset + 0.1mm.

[0012] Furthermore, after the laser engraving process is completed, the workpiece is cleaned by ultrasonic wave; ethanol solvent is used for ultrasonic cleaning, and the ultrasonic wave parameters are set as: 40kHz, 15 minutes.

[0013] Furthermore, in step S3, before using the die-casting machine to carry out the formal die-casting composite process, the titanium alloy edge strip workpiece that has completed the laser engraving process is first placed in a vacuum furnace, heated to 400-500° C., and kept warm for 30 minutes.

[0014] Furthermore, in step S4, ADC12 aluminum alloy is selected for die casting, its melting temperature is determined to be 680-720°C, and 0.1% Sr modifier is added.

[0015] Furthermore, after step S5, the composite material of the titanium alloy and the aluminum alloy is subjected to an annealing treatment, specifically, under the protection of argon gas, the temperature is set at 300° C. in an annealing furnace for 2 hours.

[0016] In summary, in the titanium alloy and aluminum alloy material combination forming process of the present invention, a number of titanium alloy side strips can be prepared in advance, and each titanium alloy side strip has a side strip body, an outer molding surface and an inner processing surface, and then the inner processing surface arranged on the inner side of the side strip body is processed by CNC technology, so that the inner processing surface has a rubber drawing groove and a number of limiting structures, and the number of limiting structures are distributed in the rubber drawing groove; and then a laser engraving machine is used to perform laser engraving on the groove surface of the rubber drawing groove provided in each titanium alloy side strip, so that the groove surface of the rubber drawing groove is made uniform. , closely distributed small holes; then, several titanium alloy side strips are placed in the die-casting mold, and each titanium alloy side strip placed in the mold is connected to each other to form a square frame; then, the die-casting machine is started, so that the die-casting machine drives the die-casting mold to complete the mold closing, and the molten aluminum material is filled into the die-casting mold by the die-casting machine, so that the molten aluminum material is formed together with the previously placed titanium alloy side strips in the die-casting mold; when the titanium alloy side strips and the aluminum alloy raw materials are formed in the die-casting mold through the die-casting process, the die-casting machine is driven to open the die-casting mold, and the user can take out the formed product. The strong and tough combination of titanium / aluminum dissimilar metals is achieved through laser microstructure, and the efficiency of the die-casting process is more than 5 times higher than that of traditional diffusion welding; the density of the composite material is ≤4.2 g / cm³, which is more than 35% lighter than the all-aluminum structure; therefore, the titanium alloy and aluminum alloy material combined molding process of the present invention solves the technical problem of how to optimize the titanium alloy middle frame manufacturing process in the 3C industry and reduce its manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of a titanium alloy edge strip applied to the titanium alloy and aluminum alloy material combination forming process of the present invention; Figure 2 It is a structural schematic diagram of an embodiment of a titanium alloy side strip connection method applied to the titanium alloy and aluminum alloy material combination forming process of the present invention; Figure 3 A schematic diagram of the structure of a titanium alloy and aluminum alloy composite structure prepared by the titanium alloy and aluminum alloy material combination molding process of the present invention; Figure 4 It is a schematic diagram of the explosion structure of the titanium alloy and aluminum alloy composite structure prepared by the titanium alloy and aluminum alloy material combined molding process of the present invention. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0024] Please also read Figures 1 to 4 A titanium alloy edge strip, comprising: an edge strip body 1, an outer shaping surface 2 and an inner processing surface 3; the outer shaping surface 2 is arranged on one side of the edge strip body 1, and the inner processing surface 3 is arranged on the other side of the edge strip body 1 relative to the outer shaping surface 2; the inner processing surface 3 is provided with a glue drawing groove 301 and a plurality of limiting structures 302; the glue drawing grooves 301 are evenly distributed with a plurality of limiting structures 302.

[0025] Specifically, a plurality of the titanium alloy side strips can be connected end to end in sequence to form a square frame, and a connection seam 101 is formed between every two titanium alloy side strips; for example, in one embodiment, two groups of U-shaped titanium alloy side strips can be connected end to end to form a square frame. The inside of the square frame is the side processing surface 3, and the outer surface of the frame is the outer styling surface.

[0026] Furthermore, a composite structure of titanium alloy and aluminum alloy includes: an edge strip body 1, an outer styling surface 2, an inner processing surface 3 and an aluminum alloy forming structure 4; the aluminum alloy forming structure 4 covers and connects each of the edge strip bodies 1, and the aluminum alloy forming structure 4 fills and connects the glue drawing groove 301 and the limiting structure 302 respectively.

[0027] Furthermore, the titanium alloy and aluminum alloy material combination forming process of the present invention comprises the following steps: S1: A plurality of titanium alloy edge strips are prepared in advance, and each titanium alloy edge strip has an edge strip body 1, an outer molding surface 2, and an inner processing surface 3, and then the inner processing surface 3 arranged on the inner side of the edge strip body 1 is processed by CNC technology, so that the inner processing surface 3 has a glue drawing groove 301 and a plurality of limiting structures 302, and the plurality of limiting structures 302 are distributed in the glue drawing groove 301; S2: using a laser engraving machine to perform laser engraving on the groove surface of the rubber drawing groove 301 provided on each titanium alloy edge strip, so that evenly and closely distributed small holes are created on the groove surface of the rubber drawing groove 301; S3: placing a plurality of titanium alloy side strips into a die-casting mold, and connecting each of the titanium alloy side strips placed in the mold to each other to form a square frame; S4: starting the die-casting machine, so that the die-casting machine drives the die-casting mold to complete the mold closing, and the molten aluminum material is filled into the die-casting mold through the die-casting machine, so that the molten aluminum material is formed together with the titanium alloy edge strip previously placed in the die-casting mold; S5: After the titanium alloy edge strip and the aluminum alloy raw material are formed in the die-casting mold through the die-casting process, the die-casting machine drives the die-casting mold to open, and the user can take out the formed product.

[0028] Based on the aforementioned titanium alloy and aluminum alloy material combination molding process, users can process the titanium alloy raw materials through CNC and then perform laser engraving on its inner surface; then put it into a die-casting mold, fill it with die-cast aluminum through a die-casting machine to form a combination, so that the titanium alloy on the surface of the final product is combined with the intermediate aluminum alloy to form a composite material, thereby achieving the purpose of reducing the production cost of the frame product.

[0029] Specifically, CNC technology, or computer numerical control technology, is a method of automatically operating machine tools using computer digital control systems. CNC technology uses pre-programmed instructions to control the machine tool's tool to perform precise cutting of blanks. These instructions are usually generated by CAD, or computer-aided design software, and converted into G-code, a universal CNC programming language, which is then interpreted and executed by the CNC machine tool's control system. During the processing, the tool moves freely on the horizontal X-axis, Y-axis, and vertical Z-axis, and sometimes also includes two rotation axes to meet the processing needs of complex-shaped parts.

[0030] Specifically, laser engraving machine, also known as laser marking machine, laser engraving machine, is a kind of equipment that uses laser beam to perform fine processing on the surface of materials; the working principle of laser engraving machine is based on the interaction between laser and material. The laser generates a laser beam, which is magnified, focused and regulated by the optical system to transmit the laser beam to the surface of the material to be processed on the workbench. The laser beam can produce chemical and physical effects on the material. When the material absorbs the laser instantaneously, it produces a physical or chemical reaction, thereby engraving marks or displaying patterns and text. The motion system is responsible for controlling the movement and positioning of the laser beam on the working surface, while the control system is responsible for controlling the parameters of the laser beam and the surface state of the material to achieve various shapes of engraving and engraving.

[0031] Therefore, in the titanium alloy and aluminum alloy material combination forming process of the present invention, a specific process embodiment is as follows: First, the titanium alloy substrate is pretreated, that is, a titanium alloy plate of TC4, Ti-6Al-4V or similar grades is selected to clarify its chemical composition and mechanical properties; then the titanium alloy plate is bent and formed by a bending process to obtain the edge strip body 1.

[0032] Then, the edge strip body 1 is rough-machined using CNC technology, that is, a 3D model of the aforementioned titanium alloy edge strip is designed, and a machining path is generated through CAM software; and then a carbide tool or a diamond-coated tool is used for rough machining, and parameter examples are as follows: Spindle speed: 800-1200rpm; Feed speed: 0.1-0.2mm / tooth; Cutting depth: 0.5-1.5mm; Keep a finishing allowance of 0.3-0.5mm.

[0033] Next, a laser engraving machine is used to perform surface micro-control processing on the glue drawing groove 301 of the CNC-processed titanium alloy edge strip. Specifically, a laser marking machine is used, such as a fiber laser, with a wavelength of 1064nm, and a honeycomb micro-hole array with a planned aperture of 50-200μm and a hole pitch of 0.3-0.8mm. The laser parameter setting example is as follows: Power: 20-50W, can be adjusted according to the thickness of titanium alloy plate; Pulse frequency: 20-50kHz; Scanning speed: 500-1500mm / s; Focus position: Z-axis offset +0.1mm to avoid excessive ablation.

[0034] After the laser engraving process is completed, ultrasonic cleaning is used to remove the slag and oxide layer on the surface of the titanium alloy edge strip; ethanol solvent is used for ultrasonic cleaning, and the ultrasonic parameters are set to: 40kHz, 15 minutes.

[0035] Furthermore, when using a die-casting machine for die-casting processing, the corresponding die-casting mold is prepared first. The core process of the die-casting mold is the setting of the cavity size. The optimal design size is: cavity size = outer contour size of the titanium alloy and aluminum alloy composite material product + 0.1mm gap; to compensate for thermal expansion factors.

[0036] In addition, it is also necessary to design an aluminum alloy runner system to ensure that the aluminum alloy melt can evenly fill the microporous structure of the titanium alloy edge strip.

[0037] After the die-casting mold is processed, it is necessary to spray boron nitride release agent in the mold cavity and preheat the mold to be produced to 200-250℃.

[0038] When using a die-casting machine for a formal die-casting composite process, first put the titanium alloy edge strip into a vacuum furnace, heat it to 400-500°C, and keep it warm for 30 minutes to reduce the thermal stress of the titanium alloy. Then, ADC12 aluminum alloy can be selected, its melting temperature is determined to be 680-720°C, and 0.1% Sr modifier is added.

[0039] Specifically, when die-casting aluminum alloy, 0.1% Sr modifier is added to the raw material of ADC12 aluminum alloy. The main effects are reflected in the following aspects: grain refinement. The Sr modifier can make the grains of the aluminum alloy smaller and more uniform. Fine grains help to disperse and transfer stress, thereby improving the strength and toughness of the alloy; improving the microstructure, adding Sr modifier can optimize the microstructure of aluminum alloy, make the silicon phase distributed in a finer and more uniform form, reduce the formation of brittle phase, and thus improve the overall mechanical properties of the alloy; improving mechanical properties, by refining grains and improving microstructure, Sr modifier can significantly improve the tensile strength, yield strength and elongation of ADC12 aluminum alloy; optimizing casting performance, fine grains and uniform microstructure help reduce defects such as shrinkage cavities and hot cracks that may occur during the casting process, and improve the yield and quality of castings; improving corrosion resistance, although the main purpose of adding Sr modifier is not to directly improve corrosion resistance, refining grains and improving microstructure help reduce defects and stress concentration points in the alloy, thereby indirectly improving the corrosion resistance of the alloy.

[0040] Furthermore, when a die-casting machine is used to die-cast the aforementioned titanium alloy edge strip using aluminum alloy raw materials, the parameters of the die-casting machine are exemplified as follows: Injection pressure: 80-120MPa; Injection speed: 3-5m / s; Holding time: 8-12 seconds.

[0041] Therefore, the molten aluminum can utilize the micropores on the surface of the titanium alloy to form a mechanical interlocking force and use metallurgical bonding to enhance the structure.

[0042] Furthermore, after the die-casting process is completed, the composite material of the titanium alloy and the aluminum alloy needs to be subjected to stress relief annealing treatment, specifically: under argon protection, the annealing process is performed in an annealing furnace at 300° C. and 2 h.

[0043] After that, it is necessary to use CNC grinding technology to fine-machine the outer surface of the composite material of titanium alloy and aluminum alloy to Ra0.8μm; and use 20MHz ultrasonic flaw detection to detect defects in its bonding layer; finally, according to the ASTM D3165 standard, determine whether the shear strength test of the composite material of titanium alloy and aluminum alloy meets the requirement of not less than 120MPa.

[0044] At this point, the main steps of the embodiment of the titanium alloy and aluminum alloy material combination molding process of the present invention have been completed. In the aforementioned process steps, the key control points are: the aspect ratio of the micropores on the inner side of the titanium alloy edge strip needs to be controlled between 1:1 and 3:1, so that when the pore diameter is 50-200μm, the depth of each micropore should be: 50-200μm or 16.7-66.7μm; in addition, the mold temperature deviation during die casting is ≤±10℃; and, during EDS analysis, the interface oxygen content is <500 ppm.

[0045] Therefore, in the titanium alloy and aluminum alloy material combination molding process of the present invention, the strong and tough combination of titanium / aluminum dissimilar metals can be achieved through laser microstructure, and the efficiency of the die-casting process is more than 5 times higher than that of traditional diffusion welding; the density of the composite material is ≤4.2 g / cm³, which is more than 35% lighter than the all-aluminum structure; thus, the purpose of optimizing the titanium alloy middle frame manufacturing process in the 3C industry and reducing its manufacturing cost can be achieved.

[0046] In summary, in the titanium alloy and aluminum alloy material combination forming process of the present invention, a plurality of titanium alloy edge strips can be prepared in advance, and each titanium alloy edge strip has an edge strip body 1, an outer molding surface 2 and an inner processing surface 3, and then the inner processing surface 3 arranged on the inner side of the edge strip body 1 is processed by CNC technology, so that the inner processing surface 3 has a rubber drawing groove 301 and a plurality of limiting structures 302, and the plurality of limiting structures 302 are distributed in the rubber drawing groove 301; and then a laser engraving machine is used to perform laser engraving on the groove surface of the rubber drawing groove 301 provided on each titanium alloy edge strip, so that the rubber drawing groove 301 is The groove surface of the groove 301 is made with small holes that are evenly and closely distributed; then, a number of titanium alloy side strips are placed in the die-casting mold, and each titanium alloy side strip placed in the mold is connected to each other to form a square frame; then, the die-casting machine is started so that the die-casting machine drives the die-casting mold to complete the mold closing, and the molten aluminum material is filled into the die-casting mold by the die-casting machine, so that the molten aluminum material is formed together with the previously placed titanium alloy side strips in the die-casting mold; when the titanium alloy side strips and the aluminum alloy raw materials are formed in the die-casting mold through the die-casting process, the die-casting machine is driven to open the die-casting mold, and the user can take out the formed product. The strong and tough combination of titanium / aluminum dissimilar metals is achieved through laser microstructure, and the efficiency of the die-casting process is more than 5 times higher than that of traditional diffusion welding; the density of the composite material is ≤4.2 g / cm³, which is more than 35% lighter than the all-aluminum structure; therefore, the titanium alloy and aluminum alloy material combined molding process of the present invention solves the technical problem of how to optimize the titanium alloy middle frame manufacturing process in the 3C industry and reduce its manufacturing cost.

[0047] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 specification.

[0048] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A titanium alloy and aluminum alloy material combination forming process, characterized in that: It includes the following steps: S1: A plurality of titanium alloy edge strips are prepared in advance, and each titanium alloy edge strip has an edge strip body, an outer molding surface, and an inner processing surface, and then the inner processing surface arranged on the inner side surface of the edge strip body is processed by CNC technology, so that the inner processing surface has a rubber drawing groove and a plurality of limiting structures, and the plurality of limiting structures are distributed in the rubber drawing groove; S2: Use a laser engraving machine to perform laser engraving on the groove surface of the rubber drawing groove provided on each titanium alloy edge strip, so that the groove surface of the rubber drawing groove is made with evenly and closely distributed small holes; S3: placing a plurality of titanium alloy side strips into a die-casting mold, and connecting each of the titanium alloy side strips placed in the mold to each other to form a square frame; S4: starting the die-casting machine, so that the die-casting machine drives the die-casting mold to complete the mold closing, and the molten aluminum material is filled into the die-casting mold through the die-casting machine, so that the molten aluminum material is formed together with the titanium alloy edge strip previously placed in the die-casting mold; S5: After the titanium alloy edge strip and the aluminum alloy raw material are formed in the die-casting mold through the die-casting process, the die-casting machine drives the die-casting mold to open, and the user can take out the formed product.

2. The titanium alloy and aluminum alloy material combination forming process according to claim 1 is characterized in that: In step S2, during laser engraving, a honeycomb micro-hole array with an aperture of 50-200 μm and a hole pitch of 0.3-0.8 mm is planned.

3. The titanium alloy and aluminum alloy material combination forming process according to claim 2 is characterized in that: In step S2, during laser engraving, the depth-to-diameter ratio of each micro-hole in the honeycomb micro-hole array is controlled to be between 1:1 and 3:

1.

4. The titanium alloy and aluminum alloy material combination forming process according to claim 2 is characterized in that: In step S2, during laser engraving, the control parameters of the laser engraving machine are: power is 20-50W; pulse frequency is 20-50kHz; scanning speed is 500-1500mm / s; focus position control amount is Z-axis offset + 0.1mm.

5. The titanium alloy and aluminum alloy material combination forming process according to claim 1 is characterized in that: After laser engraving, the workpiece is cleaned by ultrasonic wave. Ethanol solvent is used for ultrasonic cleaning, and the ultrasonic parameters are set as: 40kHz, 15 minutes.

6. The titanium alloy and aluminum alloy material combination forming process according to claim 1 is characterized in that: In step S3, before using the die-casting machine to carry out the formal die-casting composite process, the titanium alloy edge strip workpiece that has completed the laser engraving process is first placed in a vacuum furnace, heated to 400-500° C., and kept warm for 30 minutes.

7. The titanium alloy and aluminum alloy material combination forming process according to claim 1 is characterized in that: In step S4, ADC12 aluminum alloy is selected for die casting, its melting temperature is determined to be 680-720°C, and 0.1% Sr modifier is added.

8. The titanium alloy and aluminum alloy material combination forming process according to claim 1 is characterized in that: After step S5, the composite material of the titanium alloy and the aluminum alloy is annealed, specifically: under the protection of argon gas, the temperature is set at 300° C. in an annealing furnace for 2 hours.

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