A high-strength and tough die-cast aluminum alloy seat accessory that does not require heat treatment and its die-casting manufacturing method

Abstract

The present invention relates to the technical field of metal casting methods, and specifically to a high-strength and tough die-cast aluminum alloy seat accessory that does not require heat treatment and a die-casting manufacturing method thereof, comprising a plurality of seat accessories, wherein the plurality of seat accessories are connected to form a complete seat by matching accessories with cushions, and the plurality of seat accessories are made of aluminum alloy and are made by a high-pressure die-casting process, wherein the high-pressure die-casting process mainly includes smelting and injection, injection, pressure-holding solidification, mold opening and removal, and finished product processing. During the finished product processing process, the present invention screens different flash lines to determine which flash lines do not need to be processed, which flash lines need to be processed, and how the flash lines that need to be processed should be processed. This helps to optimize the flash processing process and reduce the flash processing steps during the die-casting production of aluminum alloy seat accessories.

Description

Technical Field

[0001] The present invention relates to the technical field of metal casting methods, and in particular to a high-strength and toughness die-cast aluminum alloy seat accessory that does not require heat treatment and a die-casting manufacturing method thereof. Background Art

[0002] High Pressure Die Casting (HPDC) is one of the most commonly used die-casting methods, particularly suitable for die-casting aluminum and magnesium alloys. Certain high-pressure die-cast aluminum alloys (e.g., those with specific alloy compositions, such as A380 or ADC12) can achieve sufficient mechanical properties without heat treatment through careful control of mold design and cooling rates during the casting process, making them suitable for medium- and low-load applications.

[0003] During the die-casting manufacturing process of aluminum alloy seat accessories, the aluminum alloy seat accessories are generally subjected to finish processing after demolding to remove burrs and flashes on the aluminum alloy seat accessories. However, the finish processing method adopted in the existing technology is generally to perform all-round deburring and burring on the aluminum alloy seat accessories, and some flashes on these accessories will not cause any impact during actual use. This also results in the partial deburring step having actual beneficial effects, making the finish processing steps in the die-casting process cumbersome and time-consuming. Summary of the Invention

[0004] In response to the above-mentioned shortcomings of the prior art, the present invention provides a high-strength and tough die-cast aluminum alloy seat accessory that does not require heat treatment and a die-casting manufacturing method thereof, which can effectively solve the problem in the prior art that it is difficult to screen the parts of the aluminum alloy seat accessories that actually need to be deburred.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a die-casting method for manufacturing high-strength and toughness die-cast aluminum alloy seat parts that do not require heat treatment. The method comprises at least: a plurality of seat parts, which are combined with connecting parts and cushions to form a complete seat. The finished product processing steps are as follows:

[0007] Step 1: Draw three-dimensional models of multiple seat components with assembly relationships in a three-dimensional coordinate system, and determine the sitting support surface and the sitting reference point. The sitting reference point is the center point of the sitting support surface.

[0008] Step 2: Obtain all contour lines and parting lines on the 3D model of each seat component, select the flash lines that will produce flash during the die-casting process, and mark them in the 3D coordinate system;

[0009] Step 3: Setting a human body feature model, which includes multiple joint points and multiple connecting line segments. The multiple joint points include shoulder coordinate points, elbow coordinate points, hand coordinate points, hip coordinate points, knee coordinate points, and foot coordinate points;

[0010] The coordinates of the shoulder and knee coordinate points are determined using the sitting reference point as the coordinate of the hip coordinate point. Based on the human body feature model and the preset angular range of motion, the arm swing model and the calf swing model are constructed to obtain the contact area of ​​the human body feature model in the three-dimensional coordinate system.

[0011] Determine the key strike line and the corresponding contact length based on the contact area;

[0012] Step 4: Obtain a complete seat multi-angle view and record it as an appearance two-dimensional image. When a fringe line is partially or completely displayed in the appearance two-dimensional image, record the fringe line as an exposed fringe line and obtain the exposed length;

[0013] Step 5: Obtain the exposure length and contact length of the same fringe line to calculate the fringe influence index of the fringe line, and perform different fringe treatments on the fringe line based on the fringe influence index.

[0014] Furthermore, the process of determining the sitting support surface is as follows:

[0015] Get the target model corresponding to the bottom plate in the chair structure and record it as the bottom plate model MODE 底板 , get the base plate model MODE 底板 The center coordinates are marked as (x 底板 ,y 底板 ,z 底板 ), get the seat cushion height h corresponding to the seat 坐垫 , Seat width w 坐垫 and seat cushion depth l 坐垫 , substitute into the calculation to get the coordinates of the sitting reference point (x 底板 ,y 底板 ,z 底板 +h 坐垫 ), the coordinates of the sitting reference point are the coordinates of the center point of the sitting support surface, the width of the seat cushion w 坐垫 and seat cushion depth l 坐垫 The sitting support surface is constructed for the width and length of the sitting support surface.

[0016] Furthermore, the screening and identification process of the front line includes intelligent identification, and the intelligent identification process is as follows:

[0017] A high-resolution industrial camera captures the demoulded aluminum alloy parts corresponding to the target model from multiple angles, obtaining complete high-definition images of each edge line. Each edge line is independently analyzed, and the burr width judgment value is calculated based on the distance parameter between the theoretical and actual edge profiles. After irradiating the aluminum alloy parts with a light source, the burr brightness judgment value is calculated based on the aluminum alloy edge brightness value analysis.

[0018] Obtain the fringe width judgment value and the fringe brightness judgment value and substitute them into the formula α′=μ1β1+μ2β2 for calculation to obtain the fringe judgment value α′. When the fringe judgment value is greater than or equal to the preset judgment threshold, where μ1 and μ2 are preset weight coefficients, the corresponding edge line is recorded as the fringe line and marked on the corresponding target model.

[0019] Furthermore, the calculation process of the flare width judgment value is as follows:

[0020] Mark the theoretical and actual contours of the edge line in the complete high-definition image and record them as L1 and L2 respectively. Preset a standard interval ΔD0, draw multiple straight lines perpendicular to L1 on L1, and the interval between multiple straight lines is ΔD0. Calculate the distance between each straight line and the intersection of L1 and L2, and calculate the flash width judgment value by the formula. The specific formula is: Where β1 represents the judgment value of the flash width, i is the serial number of each straight line, N is the total number of straight lines, Δd i is the distance between the i-th line and the intersection of L1 and L2.

[0021] Furthermore, the calculation process of the flash brightness judgment value is as follows:

[0022] Use a visible light source to illuminate the surface of the aluminum alloy fitting where the edge line is located, with an illumination angle greater than 0 and less than 90°, obtain a high-definition image of the surface illuminated by the visible light source, obtain the brightness value of the visible light source at each pixel in the high-definition image, obtain the sum of the brightness values ​​of the visible light source at all pixels outside the edge line and substitute it into the formula Calculation is performed to obtain the edge brightness judgment value β2, where LIGHT represents the sum of the brightness values ​​of the visible light sources of all pixels outside the edge line, and L1′ is the length of the edge line.

[0023] Furthermore, the contact area acquisition process is as follows;

[0024] Obtain the coordinates of the sitting reference point as the reference coordinates (x0, y0, z0). Use the reference coordinates as the hip coordinates of the human body feature model. Analyze and obtain the shoulder coordinates and knee coordinates in the sitting position, which are expressed as (x0, y0±y1, z0+z1) and (x0+x1, y0±y1, z0), respectively. x1, y1, and z1 are preset values, representing the femur length, hip width, and shoulder-hip difference of the human body feature model, respectively.

[0025] The shoulder coordinates are obtained and used as anchor points to limit the range of the shoulder-elbow and elbow-hand movement angles. An arm swing model of the human body feature model is constructed. The ranges of the shoulder-elbow and elbow-hand movement angles are both within preset value ranges. The arm movement area is drawn in a three-dimensional coordinate system using the arm swing model.

[0026] Obtain the knee coordinates and use them as anchor points to limit the range of the knee and foot motion angles. Construct a calf swing model for the human body model. The range of the knee and foot motion angles uses a preset value range. The knee and foot motion area is drawn in a three-dimensional coordinate system using the calf swing model.

[0027] The arm movement area and the knee and foot movement area are collectively referred to as the contact area.

[0028] Furthermore, the flashing process based on the flashing impact index is as follows:

[0029] The exposed length and contact length of the same front line are recorded as L A , L B , substitute into the formula α=λ1*L A +λ2*L B Calculation is performed to obtain the flash influence index α, where λ1 and λ2 are preset weight coefficients;

[0030] There are preset flash front influence range intervals, corresponding to general processing, fine-tuning processing, and covering processing respectively. The flash front influence range interval to which the flash front influence index corresponding to the flash front line belongs is obtained, and the corresponding processing is performed on the entire length of the flash front line;

[0031] When the flare influence index does not belong to any flare influence range, the flare on the flare line will not be processed.

[0032] A high-strength and tough die-cast aluminum alloy seat accessory that does not require heat treatment includes a base, the base includes a mounting seat and multiple support feet, the multiple support feet are arranged in an array along the circumference of the mounting seat, the lower sides of the multiple support feet have cavities, the support feet are located in the cavities and are provided with multiple reinforcing ribs, and the lower sides of the multiple reinforcing ribs are higher than the bottom surfaces of the support feet.

[0033] A computer device includes a memory and a processor, wherein the memory stores a computer program and the processor executes the steps of the above-mentioned method for die-casting a high-strength and toughness die-cast aluminum alloy seat accessory without heat treatment.

[0034] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned die-casting manufacturing method for high-strength and toughness die-cast aluminum alloy seat accessories that do not require heat treatment.

[0035] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0036] 1. The burr width judgment value and the burr brightness judgment value calculated in step 2 of the die-casting manufacturing method of the present invention are obtained based on the morphological feature data of the burr under the visual image, and can reflect the burr area and length of the surface edge of the aluminum alloy accessory. The burr judgment value obtained by comprehensive calculation of the two can help the staff accurately judge whether there is burr on the surface edge of the aluminum alloy accessory, thereby marking the straight line corresponding to the edge as the burr line. The burr line is used to indicate the edge line that is prone to burr during the die-casting process.

[0037] 2. The burr influence index of the present invention is obtained by comprehensively calculating the exposed length and the contact length, combining the appearance impact reflected by the exposed length and the contact impact reflected by the contact length. When the burr influence index is larger, it means that if burr occurs on the burr line, it will have a more obvious impact on the use of the aluminum alloy seat. Different burr lines are screened by the burr influence index to determine which burr lines do not need to be processed, which helps to optimize the burr processing process and reduce the burr processing steps during the die-casting production of aluminum alloy seat accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0039] Figure 1 A step diagram of the die-casting manufacturing method of the present invention;

[0040] Figure 2 A schematic diagram of the base structure.

[0041] In the figure: 1. Mounting base; 2. Support foot; 3. Cavity; 4. Reinforcement rib. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0043] The present invention will be further described below with reference to the embodiments.

[0044] See Figure 1 A method for die-casting high-strength and tough die-cast aluminum alloy seat components that do not require heat treatment includes at least multiple seat components (including a base plate, backrest, support base, and armrests). The multiple seat components are connected to the components and matched with soft cushions (seat cushions) to form a complete seat. The multiple seat components are made of aluminum alloy and are made by a high-pressure die-casting process. The high-pressure die-casting process mainly includes melting and pouring, injection molding, pressure-holding solidification, mold opening and removal, and finished product processing. The finished product processing process includes the following steps:

[0045] Step 1: Obtain 1:1 3D models of multiple seat components and record them as target models MODE h , where h represents the number of the seat accessories (the maximum value of h is equal to the total number of seat accessories required for a chair). All target models are drawn with a specific positional relationship in a three-dimensional coordinate system (x-axis, y-axis, and z-axis coordinate system, corresponding to the horizontal axis, horizontal axis, and vertical axis, respectively). The positional relationship between each target model is consistent with its assembly relationship in the complete chair (i.e., a specific positional relationship. By observing the position of the target model in the three-dimensional coordinate system, the spatial distribution of each target model after actual assembly can be clearly and intuitively seen). All target models with an assembly relationship are collectively referred to as a chair structure. The sitting support surface and the sitting reference point are determined based on the chair structure. The sitting reference point is the center point of the sitting support surface. The process of determining the sitting support surface is as follows:

[0046] Get the target model corresponding to the bottom plate (a plate-shaped aluminum alloy accessory used to support the seat cushion) in the chair structure and record it as the bottom plate model MODE 底板 , get the base plate model MODE 底板 The center coordinates are marked as (x 底板 ,y 底板 ,z 底板 ), get the seat cushion height h corresponding to the seat 坐垫 , Seat width w 坐垫 and seat cushion depth l 坐垫 , substitute into the calculation to get the coordinates of the sitting reference point (x 底板 ,y 底板 ,z 底板 +h 坐垫 ), the coordinates of the sitting reference point are the coordinates of the center point of the sitting support surface, the width of the seat cushion w 坐垫 and seat cushion depth l 坐垫 The sitting support surface is constructed for the width and length of the sitting support surface.

[0047] It should be noted that the construction of a three-dimensional model and the distribution setting of positional relationships in a three-dimensional coordinate system can be achieved through three-dimensional modeling software, such as Unigraphics NX and SOLIDWORKS. Three-dimensional modeling technology is an existing and mature information technology and will not be elaborated on here.

[0048] Step 2: Obtain all contour lines and parting lines on each target model, collectively referred to as edge lines (edge ​​lines include the flash lines formed by the mold vents or gates on the target model), and select the flash lines from multiple edge lines. The flash lines refer to the edge lines where flash will appear during the die-casting process. Mark all the flash lines on the chair structure in the three-dimensional coordinate system.

[0049] It should be noted that since aluminum alloy accessories are generally made by high-pressure die-casting, and the high-pressure die-casting process will form high-pressure liquid metal flows in the mold cavity, these metal flows will invade the mold parting surface under high-pressure conditions, resulting in the formation of flash. In addition, the tolerance of the mold will also lead to the inevitable existence of gaps on the mold parting surface, which also contributes to the formation of flash. Therefore, it is usually impossible to avoid the existence of flash on the edge of aluminum alloy accessories during the high-pressure die-casting process.

[0050] The screening and identification process of the front line includes manual identification and intelligent identification. The manual identification process is as follows:

[0051] The aluminum alloy parts after demoulding are obtained and recorded as analysis parts. The staff marks the edges with burrs on the analysis parts and records them as analysis edges. On the target model corresponding to the analysis parts, the contour edges corresponding to the analysis edges are marked (checked) and recorded as burrs.

[0052] The intelligent recognition process of the front line is as follows:

[0053] A high-resolution industrial camera captures the demoulded aluminum alloy parts corresponding to the target model from multiple angles, obtaining complete high-definition images of each edge line and performing independent analysis on each edge line:

[0054] Mark the theoretical outline of the edge line in the complete high-definition image (specifically, a smooth straight line or curve) and the actual outline (that is, the edge outline of the aluminum alloy accessory actually scanned, which completely or partially overlaps with the theoretical outline, depending on whether the accessory has a burr on the edge line) as L1 and L2 respectively. A standard interval ΔD0 is preset, and multiple straight lines perpendicular to L1 are drawn on L1. The interval between the multiple straight lines is ΔD0. The distance between each straight line and the intersection of L1 and L2 is calculated, and the burr width judgment value is calculated by the formula. The specific formula is: Where β1 represents the judgment value of the flash width, i is the serial number of each straight line, N is the total number of straight lines, Δd i is the distance between the i-th line and the intersection of L1 and L2.

[0055] It should be noted that the burr width judgment value reflects the width of the burr in actual application. When the burr is wider, its contour deviates more from the edge contour of the accessory body, which leads to Δd i The larger the value is, the larger the burr width judgment value is. Therefore, the burr width judgment value can be used to determine whether there is burr and the average width of the burr.

[0056] A visible light source is used to illuminate the surface of the aluminum alloy accessory where the edge line is located, with an illumination angle greater than 0° and less than 90°, to obtain a high-definition image of the surface illuminated by the visible light source (the shooting angle of the high-definition image is perpendicular to the illuminated surface, so that the edge line and the possible burrs on the edge line occupy as large an area as possible in the high-definition image), and the brightness value of the visible light source of each pixel in the high-definition image is obtained. The sum of the brightness values ​​of the visible light source of all pixels outside the edge line (i.e., the side of the edge line away from the aluminum alloy accessory body) is obtained and substituted into the formula Calculation is performed to obtain the edge brightness judgment value β2, where LIGHT represents the sum of the brightness values ​​of the visible light sources of all pixels outside the edge line, and L1′ is the length of the edge line.

[0057] It should be noted that the visible light source brightness value refers to the intensity of the reflected light from the visible light source on the surface of the aluminum alloy accessory. By processing the HD image accordingly, the light intensity of specific channel values ​​in the HD image can be captured. The surface of the burr is typically rougher than the main part of the accessory, showing a high-frequency texture. This high-frequency texture produces a more pronounced diffuse reflection when illuminated by a light source, rather than the primarily specular reflection of the aluminum alloy part. Therefore, when the light source is non-perpendicular, the burr's reflected brightness will be stronger than that of the main part, resulting in a higher light intensity in the image.

[0058] Obtain the fringe width judgment value and the fringe brightness judgment value and substitute them into the formula α′=μ1β1+μ2β2 for calculation to obtain the fringe judgment value α′. When the fringe judgment value is greater than or equal to the preset judgment threshold, where μ1 and μ2 are preset weight coefficients, the corresponding edge line is recorded as the fringe line and marked on the corresponding target model.

[0059] Step 3: Set up a human feature model, which includes multiple joint points and multiple connecting line segments. The multiple joint points include shoulder coordinate points, elbow coordinate points, hand coordinate points, neck coordinate points, hip coordinate points, hip coordinate points, knee coordinate points, and foot coordinate points. The multiple coordinate points are connected by connecting line segments, where different connecting line segments represent different parts of the human body. For example, the connecting line segment between the elbow coordinate point and the hand coordinate point represents the forearm and hand of the human body.

[0060] Obtain the coordinates of the sitting reference point as the reference coordinates (x0, y0, z0), and use the reference coordinates as the hip coordinates of the human body feature model (i.e., the coordinates of the hip coordinate point, the same below) to analyze and obtain the shoulder coordinates and knee coordinates in the sitting state, which are expressed as (x0, y0±y1, z0+z1) and (x0+x1, y0±y1, z0), respectively. x1, y1, and z1 are preset values, representing the femur length, hip width, and shoulder-hip difference (the height difference between the shoulder and the hip) of the human body feature model, respectively. In a specific embodiment, the values ​​are 43, 35, and 50, respectively.

[0061] By constructing a human feature model, we can simulate the human body's movements while using a chair, thereby understanding the range of human movement and determining the contact range during the interaction between the human body and the chair structure, thereby facilitating the analysis of the contact association between human movement and different target models. It should be noted that when analyzing the human feature model in the sitting position, the torso is assumed to be upright and facing the front of the chair, with the thighs parallel to the sitting support surface (i.e., the seat cushion). Generally, the user's sitting posture when using a chair is similar to that of the human feature model.

[0062] The shoulder coordinates are obtained and used as anchor points. The range of the shoulder-elbow motion angle (i.e., the angle between the shoulder-elbow connecting line segment and the shoulder connecting line segment) and the elbow-hand motion angle (i.e., the angle between the shoulder-elbow connecting line segment and the elbow-hand connecting line segment) are restricted. An arm swing model of the human body feature model is constructed. The ranges of the shoulder-elbow motion angle and the elbow-hand motion angle both use preset value ranges. The arm motion area (i.e., the movable range of the arm part of the human body feature model under the condition of restricted motion angle) is drawn in the three-dimensional coordinate system through the arm swing model.

[0063] The knee coordinates are obtained and used as anchor points. The range of the knee-foot motion angle (i.e., the angle between the line segment connecting the knee and foot and the line segment connecting the knee and hip) is limited. A calf swing model of the human body feature model is constructed. The range of the knee-foot motion angle adopts a preset value range. The knee-foot motion area (both the arm motion area and the knee-foot motion area are three-dimensional areas) is drawn in a three-dimensional coordinate system using the calf swing model.

[0064] The arm activity area and the knee and foot activity area are collectively referred to as the contact area. When there is an overlapping part between any fringe line and the contact area, the fringe line is marked as the key fringe line and the length of the overlapping part is obtained and recorded as the contact length of the key fringe line. The key fringe line part of the aluminum alloy accessories is fringe-treated.

[0065] It should be noted that the connecting line segment between two joint points is represented by the first characters of the two joint points. For example, the connecting line segment between the knee coordinate point and the foot coordinate point is represented as the connecting line segment between the knee and the foot, and so on. The activity angle represents the angle at which the connecting line segment can move. The activity angle is the angle relative to the nearest joint point on the torso side. For example, the shoulder-elbow activity angle represents the activity angle range of the shoulder-elbow connecting line segment relative to the shoulder coordinate point. The activity angle range is set by the staff during the specific implementation process, and mainly depends on the degree of freedom of each joint of the human body and the daily activity angle range.

[0066] When there is an overlapping part between the fin line and the contact area, it means that the fin line may come into contact with the user during daily use. Since the fin line is generally thin (such as 0.1-1mm), the edge of the area is irregular and sharp and serrated, if it comes into contact with the user's body, it may cause scratches on the user's skin. Therefore, the fin on the fin line should be handled first to ensure the user's safety.

[0067] Step 4: Draw a complete model of the aluminum alloy seat (including the seat cushion and other non-aluminum alloy accessories) in a three-dimensional coordinate system, obtain multi-angle views of the complete model and record them as the appearance two-dimensional view. The multi-angle views include but are not limited to the front view, rear view, isometric view and top view. The appearance two-dimensional view is used to show the appearance structure of the aluminum alloy seat at different viewing angles during use. When a fin line is partially or completely displayed in the appearance two-dimensional view, the fin line is recorded as an exposed fin line, and the exposed fin line part of the aluminum alloy accessory is fined, and the display length of the exposed fin line in the appearance two-dimensional view is obtained and recorded as the exposed length of the exposed fin line.

[0068] It should be noted that the two-dimensional appearance diagram can fully demonstrate the appearance of the aluminum alloy seat during daily use. When the burr line is exposed in the two-dimensional appearance diagram, it means that the burr line will be observed by the naked eye during daily use. One of the main impacts of the existence of the burr is the appearance of the aluminum alloy structural parts. The burr exposed to the field of vision will affect the overall smoothness of the appearance of the aluminum alloy seat. Therefore, this part of the burr needs to be removed during the production process of the aluminum alloy accessories to ensure that the appearance of the aluminum alloy seat is not affected.

[0069] Step 5: Obtain the exposed length and contact length of the same front line and record them as L A , L B , substitute into the formula α=λ1*L A +λ2*L BCalculation is performed to obtain the flash influence index α, wherein λ1 and λ2 are preset weight coefficients, and three flash influence range intervals with increasing midpoint values ​​are preset, corresponding to general processing, fine-tuning processing, and covering processing respectively. The flash influence range interval to which the flash influence index of the flash line corresponds is obtained, and the corresponding processing is performed on the entire length of the flash line. Conversely, when the flash influence index does not belong to any flash influence range interval, the flash on the flash line is not processed.

[0070] The burr impact index is calculated comprehensively by the exposed length and the contact length, combining the appearance impact reflected by the exposed length and the contact impact reflected by the contact length. Therefore, the burr impact index as a whole reflects the degree of influence of the burr on the burr line in the actual impact process of the aluminum alloy seat. When the burr impact index is larger, it means that if burr appears on the burr line, it will have a more obvious impact on the use of the aluminum alloy seat, which may manifest as the user easily getting cut by accident, or the user can observe the existence of the burr with the naked eye, affecting the overall aesthetics. Therefore, the larger the burr impact index is, the higher the corresponding processing level should be, and more complex processing is required to overcome the use impact caused by the burr.

[0071] By screening different burrs to determine which burrs do not need to be processed, which burrs need to be processed, and how to process the burrs that need to be processed, it is helpful to optimize the burr processing process during the die-casting production of aluminum alloy seat accessories, reduce the burr processing steps, and take measures to not process the burrs that do not affect the actual use and appearance of the seat. Compared with the unified treatment in the existing technology (i.e., all-round burr removal for die-cast aluminum alloy accessories), the efficiency of finished product processing in the die-casting process of aluminum alloy accessories is greatly improved, which not only ensures that the processed aluminum alloy accessories will not have too much impact on the use and appearance of the seat, but also reduces the cost investment required for burr removal, which is conducive to the development of die-casting manufacturing of aluminum alloy seat accessories.

[0072] See Figure 2, a high-strength and toughness die-cast aluminum alloy seat accessory that does not require heat treatment is die-casted using the above-mentioned high-strength and toughness die-cast aluminum alloy seat accessory die-casting manufacturing method that does not require heat treatment, including a base, the base including a mounting seat 1 and multiple support feet 2, the multiple support feet 2 are arranged in an array along the circumference of the mounting seat, and the lower sides of the multiple support feet 2 have cavities 3, thereby reducing the raw materials required in the die-casting manufacturing process of the support feet 2, reducing costs and reducing the overall weight of the base, the support feet 2 are located in the cavity 3 and are provided with multiple reinforcing ribs 4, so that the overall rigidity of the support feet 2 remains at a good level to ensure stability during use, the lower sides of the multiple reinforcing ribs 4 are higher than the bottom surfaces of the support feet 2, so that the reinforcing ribs 4 are retracted as a whole into the cavity of the support feet 2, and when die-casting using the above-mentioned high-strength and toughness die-cast aluminum alloy seat accessory die-casting manufacturing method that does not require heat treatment, there is no need to process the burrs on the edges of the reinforcing ribs 4, which reduces the processing steps in the die-casting manufacturing process of the base and improves the efficiency of the die-casting manufacturing of the base.

[0073] A computer device includes a memory and a processor, wherein the memory stores a computer program and the processor executes the steps of the above-mentioned method for die-casting a high-strength and toughness die-cast aluminum alloy seat accessory without heat treatment.

[0074] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned die-casting manufacturing method for high-strength and toughness die-cast aluminum alloy seat accessories that do not require heat treatment.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A die-casting method for manufacturing high-strength and tough die-cast aluminum alloy seat parts without heat treatment, comprising a plurality of seat parts, wherein the die-casting manufacturing process of the seat parts includes melting and pouring, injection molding, pressure-holding solidification, mold opening and removal, and finished product processing, characterized in that: The finished product processing steps are as follows: Step 1: Draw three-dimensional models of multiple seat components with assembly relationships in a three-dimensional coordinate system, and determine the sitting support surface and the sitting reference point. The sitting reference point is the center point of the sitting support surface. Step 2: Obtain all contour lines and parting lines on the 3D model of each seat component, select the flash lines that will produce flash during the die-casting process, and mark them in the 3D coordinate system; Step 3: Setting a human body feature model, which includes multiple joint points and multiple connecting line segments. The multiple joint points include shoulder coordinate points, elbow coordinate points, hand coordinate points, hip coordinate points, knee coordinate points, and foot coordinate points; The coordinates of the shoulder and knee coordinate points are determined using the sitting reference point as the coordinate of the hip coordinate point. Based on the human body feature model and the preset angular range of motion, the arm swing model and the calf swing model are constructed to obtain the contact area of ​​the human body feature model in the three-dimensional coordinate system. Determine the key strike line and the corresponding contact length based on the contact area; Step 4: Obtain a complete seat multi-angle view and record it as an appearance two-dimensional image. When a fringe line is partially or completely displayed in the appearance two-dimensional image, record the fringe line as an exposed fringe line and obtain the exposed length; Step 5: Obtain the exposure length and contact length of the same fringe line to calculate the fringe influence index of the fringe line, and perform different fringe treatments on the fringe line based on the fringe influence index.

2. The die-casting manufacturing method of a high-strength and tough die-cast aluminum alloy seat component that does not require heat treatment according to claim 1 is characterized in that: The process of determining the sitting support surface is as follows: Get the target model corresponding to the bottom plate in the chair structure and record it as the bottom plate model MODE 底板 , get the base plate model MODE 底板 The center coordinates are marked as (x 底板 ,y 底板 ,z 底板 ), get the seat cushion height h corresponding to the seat 坐垫 , Seat width w 坐垫 and seat cushion depth l 坐垫 , substitute into the calculation to get the coordinates of the sitting reference point (x 底板 ,y 底板 ,z 底板 +h 坐垫 ), the coordinates of the sitting reference point are the coordinates of the center point of the sitting support surface, the width of the seat cushion w 坐垫 and seat cushion depth l 坐垫 The sitting support surface is constructed for the width and length of the sitting support surface.

3. The die-casting manufacturing method of a high-strength and tough die-cast aluminum alloy seat component that does not require heat treatment according to claim 1 is characterized in that: The screening and identification process of the front line includes intelligent identification, and the intelligent identification process is as follows: The industrial camera captures the demoulded aluminum alloy parts corresponding to the target model from multiple angles, obtaining complete high-definition images of each edge line. Each edge line is independently analyzed, and the burr width judgment value is calculated based on the distance parameter between the theoretical and actual edge profiles. After irradiating the aluminum alloy parts with a light source, the burr brightness judgment value is calculated based on the aluminum alloy edge brightness value analysis. Obtain the fringe width judgment value and the fringe brightness judgment value and substitute them into the formula α′=μ1β1+μ2β2 for calculation to obtain the fringe judgment value α′. When the fringe judgment value is greater than or equal to the preset judgment threshold, where μ1 and μ2 are preset weight coefficients, the corresponding edge line is recorded as the fringe line and marked on the corresponding target model.

4. The die-casting manufacturing method of a high-strength and tough die-cast aluminum alloy seat component that does not require heat treatment according to claim 3 is characterized in that: The calculation process of the flash width judgment value is as follows: Mark the theoretical and actual contours of the edge line in the complete image and record them as L1 and L2 respectively. Preset a standard interval ΔD0, draw multiple straight lines perpendicular to L1 on L1, and the interval between multiple straight lines is ΔD0. Calculate the distance between each straight line and the intersection of L1 and L2, and calculate the flash width judgment value by the formula. The specific formula is: Where β1 represents the judgment value of the flash width, i is the serial number of each straight line, N is the total number of straight lines, Δd i is the distance between the i-th line and the intersection of L1 and L2.

5. The die-casting manufacturing method of a high-strength and tough die-cast aluminum alloy seat component that does not require heat treatment according to claim 4 is characterized in that: The calculation process of the flash brightness judgment value is as follows: Use a visible light source to illuminate the surface of the aluminum alloy fitting where the edge line is located, with an illumination angle greater than 0 and less than 90°, obtain a high-definition image of the surface illuminated by the visible light source, obtain the brightness value of the visible light source at each pixel in the high-definition image, obtain the sum of the brightness values ​​of the visible light source at all pixels outside the edge line and substitute it into the formula Calculation is performed to obtain the edge brightness judgment value β2, where LIGHT represents the sum of the brightness values ​​of the visible light sources of all pixels outside the edge line, and L1′ is the length of the edge line.

6. The die-casting manufacturing method of a high-strength and tough die-cast aluminum alloy seat component that does not require heat treatment according to claim 1 is characterized in that: The process of obtaining the contact area is as follows; Obtain the coordinates of the sitting reference point as the reference coordinates (x0, y0, z0). Use the reference coordinates as the hip coordinates of the human body feature model. Analyze and obtain the shoulder coordinates and knee coordinates in the sitting position, which are expressed as (x0, y0±y1, z0+z1) and (x0+x1, y0±y1, z0), respectively. x1, y1, and z1 are preset values, representing the femur length, hip width, and shoulder-hip difference of the human body feature model, respectively. The shoulder coordinates are obtained and used as anchor points to limit the range of the shoulder-elbow and elbow-hand movement angles. An arm swing model of the human body feature model is constructed. The ranges of the shoulder-elbow and elbow-hand movement angles are both within preset value ranges. The arm movement area is drawn in a three-dimensional coordinate system using the arm swing model. Obtain the knee coordinates and use them as anchor points to limit the range of the knee and foot motion angles. Construct a calf swing model for the human body model. The range of the knee and foot motion angles uses a preset value range. The knee and foot motion area is drawn in a three-dimensional coordinate system using the calf swing model. The arm movement area and the knee and foot movement area are collectively referred to as the contact area.

7. The die-casting manufacturing method of a high-strength and tough die-cast aluminum alloy seat component that does not require heat treatment according to claim 1 is characterized in that: The process of processing the flash based on the flash impact index is as follows: The exposed length and contact length of the same front line are recorded as L A , L B , substitute into the formula α=λ1*L A +λ2*L B Calculation is performed to obtain the flash influence index α, where λ1 and λ2 are preset weight coefficients; There are preset flash front influence range intervals, corresponding to general processing, fine-tuning processing, and covering processing respectively. The flash front influence range interval to which the flash front influence index corresponding to the flash front line belongs is obtained, and the corresponding processing is performed on the entire length of the flash front line; When the flare influence index does not belong to any flare influence range, the flare on the flare line will not be processed.

8. A high-strength and tough die-cast aluminum alloy seat accessory that does not require heat treatment, manufactured by the die-casting manufacturing method of a high-strength and tough die-cast aluminum alloy seat accessory that does not require heat treatment according to any one of claims 1 to 7, characterized in that: The invention comprises a base, wherein the base comprises a mounting seat (1) and a plurality of supporting legs (2), wherein the plurality of supporting legs (2) are arranged in an array along the circumference of the mounting seat (1), wherein the lower sides of the plurality of supporting legs (2) have cavities (3), and wherein the supporting legs (2) are provided with a plurality of reinforcing ribs (4) in the cavities (3), wherein the lower sides of the plurality of reinforcing ribs (4) are higher than the bottom surfaces of the supporting legs (2).

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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