Aluminum alloy die casting surface treatment process

Abstract

The invention provides an aluminum alloy die casting surface treatment process which comprises the following steps: selecting a proper aluminum alloy die casting, fixing the die casting through a clamping mechanism, and moving the die casting into a cleaning mechanism; the cleaning mechanism is used for removing stains; drying is performed in the drying mechanism; phosphating treatment is carried out in the phosphating device; and after phosphating treatment is completed, if it is observed that the phosphating effect is poor, the die casting returns to the cleaning mechanism to be cleaned, and the operation of the S3 and the operation of the S4 are repeated. A rack ascends and descends to drive a pinion to rotate, so that a second bevel gear rotates, a first bevel gear and synchronous wheels rotate, the multiple synchronous wheels rotate synchronously through a synchronous belt, a rotating rod rotates, stirring blades are driven to rotate, a phosphating solution is stirred, meanwhile, the phosphating solution is heated through a heating plate, and the phosphating effect is improved. The temperature and the concentration of the phosphating solution can be uniformly distributed, so that the die casting can be uniformly phosphated, and the phenomenon that a phosphating layer is easy to fall off after long-time use is avoided.

Description

Technical Field

[0001] The invention mainly relates to the technical field of aluminum alloy die castings, and in particular to a surface treatment process of aluminum alloy die castings. Background Art

[0002] Die casting is a fast-growing high-efficiency, low-cutting metal forming precision casting method in modern metal processing technology. Die castings have high dimensional accuracy, low surface roughness values, and high strength and hardness. Due to the above advantages, the die casting process has been widely used in all walks of life in the national economy. Die casting aluminum alloy is currently the most widely used die casting material, with good die casting performance, good surface roughness and small thermal cracking. However, the volume shrinkage rate of aluminum alloy is large, and aluminum alloy die castings have inherent and unavoidable casting defects, such as pores, cracks, inclusions, local depressions or flow marks, etc., which damage the surface quality of die castings. These defects make subsequent processing very difficult, and also make the yield of die casting products low;

[0003] The surface treatment process of aluminum alloy die-castings in the prior art has complicated operation procedures and is prone to uneven phosphating layer, which causes the coating to fall off easily after long-term use, resulting in poor corrosion resistance and weather resistance of the product, and a low yield rate, which can no longer meet the needs of the existing market. Therefore, the present invention provides a surface treatment process for aluminum alloy die-castings to solve the above problems. Summary of the invention

[0004] The present invention mainly provides a surface treatment process for aluminum alloy die castings to solve the technical problems raised in the above background technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a surface treatment process of aluminum alloy die castings, comprising the following steps:

[0006] S1, select a suitable aluminum alloy die-casting, fix the die-casting on the processing table through a clamping mechanism, and move the die-casting into the cleaning mechanism through a height adjustment device and a moving device;

[0007] S2, using a cleaning mechanism to remove stains on the surface of the die casting;

[0008] S3, transferring the die casting to a drying mechanism for drying;

[0009] S4, transferring the dried die casting to a phosphating device for phosphating treatment, while adjusting the temperature of the phosphating solution;

[0010] S5, after the phosphating treatment is completed, if it is observed that the phosphating effect is poor, the die casting is returned to the cleaning mechanism for cleaning, and the operations of S3 and S4 are repeated until the die casting passes the phosphating treatment.

[0011] Furthermore, in S1, a moving device is connected to the top of the processing table, and the moving device includes a first motor connected to one side of the top of the processing table, a first screw rod connected to a driving end of the first motor, and a moving seat connected to one side of the first screw rod.

[0012] In the present invention, the first screw rod is convenient for driving the movable seat to move, thereby adjusting the position of the die casting.

[0013] Furthermore, a track assembly is connected to one side of the top of the processing table, and the track assembly includes a track connected to the top of the processing table and a synchronous seat slidably connected to the top of the track, and a height adjustment device is connected to the top of the synchronous seat and the movable seat.

[0014] Furthermore, the height adjustment device includes a fixed frame connected to the synchronous seat and the top of the movable seat, a second motor connected to the top of the fixed frame, a second screw rod connected to the driving end of the second motor, and a Z-shaped plate connected to the bottom of the second screw rod.

[0015] In the present invention, the rotation of the second screw rod facilitates the lifting and lowering of the Z-shaped plate, thereby facilitating the adjustment of the height of the die-casting.

[0016] Furthermore, one side of the top of the Z-shaped plate is connected to a clamping mechanism, and the clamping mechanism includes a bidirectional screw connecting the two Z-shaped plates, an L-shaped clamping plate connected to both sides of the bidirectional screw, and a third motor connected to one side of the bidirectional screw, and both sides of the bidirectional screw are rotatably connected to the Z-shaped plate;

[0017] One side of the bottom of the L-shaped clamping plate is connected to a rack, and the rack is matched with the phosphating device.

[0018] In the present invention, the rotation of the bidirectional screw rod facilitates the two L-shaped clamping plates to move in opposite directions, thereby clamping the die casting. When the die casting moves to the position with the phosphating device, the rack can cooperate with the phosphating device.

[0019] Further, the phosphating device includes a solution tank connected to one side of the top of the processing table, a rotating rod rotatably connected to multiple top corners of the bottom of the solution tank, multiple stirring blades connected to the outer wall of the bottom of the rotating rod, and a heating plate connected to the inside of the stirring blade;

[0020] The top of the rotating rod is connected to a synchronous wheel, and multiple synchronous wheels are meshed and connected through a synchronous belt. The top of one synchronous wheel is connected to a first bevel gear, one side of the first bevel gear is meshed and connected to a second bevel gear, and one side of the second bevel gear is connected to a pinion, and the pinion cooperates with the rack.

[0021] In the present invention, the heating plate is convenient for heating the phosphating solution, and the pinion is driven to rotate by the descending of the rack, so as to rotate the rotating rod. The rotation of the rotating rod is convenient for driving the stirring blade to rotate, so as to make the temperature of the phosphating solution uniform and accelerate the phosphating rate.

[0022] Furthermore, in S1, the cleaning mechanism includes a water tank connected to the top of the processing table and a plurality of water guns connected to multiple sides of the water tank.

[0023] In the present invention, the water gun is convenient for spraying clean water in the water tank onto the surface of the die casting, so as to facilitate cleaning of the die casting.

[0024] Furthermore, in S3, the drying mechanism includes a sealed box connected to the top of the processing table, a heating tube connected to the bottom of the sealed box, a fourth motor connected to the bottom of the sealed box and a fan blade connected to the driving end of the fourth motor, and the fan blade is located at the bottom of the heating tube.

[0025] In the present invention, the heating tube is convenient for heating the air and blowing the hot air to the surface of the die casting through the fan blades, thereby improving the drying speed.

[0026] Furthermore, the two Z-shaped plates are connected by a limiting rod, and the limiting rod is slidably connected to the hole body at the top of the L-shaped clamping plate.

[0027] In the present invention, the limiting rod is convenient for limiting the position of the L-shaped clamping plate to prevent the L-shaped clamping plate from rotating with the bidirectional screw rod.

[0028] Furthermore, the bottom of the synchronous seat is rotatably connected to a plurality of rollers.

[0029] In the present invention, the roller reduces the friction between the synchronous seat and the track, making it easier for the synchronous seat to slide.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention drives the bidirectional screw to rotate by the third motor, so that the two L-shaped clamping plates move in opposite directions, thereby clamping the die casting, and then drives the second screw to rotate by the second motor, so that the Z-shaped plate is lifted and lowered to adjust the height of the die casting, and drives the first screw to rotate by the first motor, thereby driving the moving seat and the die casting to move, sprays clean water in the water tank to the surface of the die casting by a water gun, thereby removing stains on the surface of the die casting, heats the air by the heating pipe, and drives the fan blade to rotate by the fourth motor, thereby blowing hot air to the surface of the die casting, accelerating the drying speed of the die casting, driving the pinion to rotate by the rack lifting and lowering, thereby rotating the second bevel gear, thereby rotating the first bevel gear and the synchronous wheel, and rotating the multiple synchronous wheels synchronously by the synchronous belt, thereby rotating the rotating rod, thereby driving the stirring blade to rotate, and stirring the phosphating solution, and heating the phosphating solution by the heating plate, so as to make the temperature and concentration of the phosphating solution uniform, so that the die casting can be phosphated uniformly, avoiding the phenomenon that the phosphating layer is easy to fall off after long-term use, and improving the yield rate.

[0032] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a flow chart of the surface treatment process of aluminum alloy die castings of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the processing device of the present invention;

[0035] Figure 3 A partial cross-sectional view of the processing device of the present invention;

[0036] Figure 4 It is a structural schematic diagram of the processing device of the present invention;

[0037] Figure 5 A partial cross-sectional view of the processing device of the present invention;

[0038] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0039] Figure 7 is a cross-sectional view of the processing device of the present invention;

[0040] Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0041] In the figure: 10, processing table; 20, moving device; 21, first motor; 22, first screw rod; 23, moving seat; 30, height adjustment device; 31, fixed frame; 32, second motor; 33, second screw rod; 34, Z-type plate; 341, limit rod; 40, clamping mechanism; 41, third motor; 42, two-way screw rod; 43, L-type clamping plate; 44, rack; 50, cleaning mechanism; 51, water tank; 52, water gun; 60, drying mechanism; 61, sealing box; 62, fourth motor; 63, fan blade; 64, heating tube; 70, phosphating device; 71, solution tank; 72, rotating rod; 73, stirring blade; 74, synchronous wheel; 75, first bevel gear; 76, second bevel gear; 77, pinion; 78, synchronous belt; 79, heating plate; 80, track assembly; 81, track; 82, synchronous seat; 821, roller. DETAILED DESCRIPTION

[0042] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0043] It should be noted that when an element is referred to as being "fixed 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", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0045] For examples, please refer to the attached Figure 1-8 , a surface treatment process for aluminum alloy die castings, comprising the following steps:

[0046] S1, select a suitable aluminum alloy die-casting, fix the die-casting on the processing table 10 through the clamping mechanism 40, and move the die-casting into the cleaning mechanism 50 through the height adjustment device 30 and the moving device 20;

[0047] S2, using the cleaning mechanism 50 to remove stains on the surface of the die casting;

[0048] S3, transferring the die casting to the drying mechanism 60 for drying;

[0049] S4, transferring the dried die casting to the phosphating device 70 for phosphating treatment, while adjusting the temperature of the phosphating solution;

[0050] S5, after the phosphating treatment is completed, if it is observed that the phosphating effect is poor, the die casting is returned to the cleaning mechanism 50 for cleaning, and the operations of S3 and S4 are repeated until the die casting passes the phosphating treatment.

[0051] For examples, please refer to the attached Figure 4 In S1, the top of the processing table 10 is connected to a moving device 20, and the moving device 20 includes a first motor 21 connected to one side of the top of the processing table 10, a first screw rod 22 connected to the driving end of the first motor 21, and a moving seat 23 connected to one side of the first screw rod 22.

[0052] It should be noted that, in the embodiment, the first motor 21 drives the first screw rod 22 to rotate, thereby driving the moving seat 23 to move, thereby adjusting the position of the die-casting.

[0053] For examples, please refer to the attached Figure 3 and Figure 8 A track assembly 80 is connected to one side of the top of the processing table 10. The track assembly 80 includes a track 81 connected to the top of the processing table 10 and a synchronous seat 82 slidably connected to the top of the track 81. The synchronous seat 82 and the top of the movable seat 23 are connected to a height adjustment device 30.

[0054] For examples, please refer to the attached Figure 3-4 The height adjustment device 30 includes a fixed frame 31 connected to the synchronous seat 82 and the top of the movable seat 23, a second motor 32 connected to the top of the fixed frame 31, a second screw rod 33 connected to the driving end of the second motor 32, and a Z-shaped plate 34 connected to the bottom of the second screw rod 33.

[0055] It should be noted that, in the embodiment, the second motor 32 drives the second screw rod 33 to rotate, so that the Z-shaped plate 34 is raised and lowered, so as to facilitate the adjustment of the height of the die-casting.

[0056] For examples, please refer to the attached Figure 3 The top side of the Z-shaped plate 34 is connected to a clamping mechanism 40, and the clamping mechanism 40 includes a bidirectional screw rod 42 connecting the two Z-shaped plates 34, an L-shaped clamping plate 43 connected to both sides of the bidirectional screw rod 42, and a third motor 41 connected to one side of the bidirectional screw rod 42, and both sides of the bidirectional screw rod 42 are rotatably connected to the Z-shaped plate 34;

[0057] One side of the bottom of the L-shaped clamping plate 43 is connected to a rack 44 , and the rack 44 cooperates with the phosphating device 70 .

[0058] It should be noted that, in the embodiment, the bidirectional screw 42 is driven to rotate by the third motor 41, so that the two L-shaped clamps 43 move in opposite directions, thereby clamping the die-casting. When the die-casting moves to the position with the phosphating device 70, the rack 44 and the phosphating device 70 can just cooperate.

[0059] For examples, please refer to the attached Figure 4-5 The phosphating device 70 includes a solution tank 71 connected to one side of the top of the processing table 10, a rotating rod 72 rotatably connected to multiple vertex corners at the bottom of the solution tank 71, multiple stirring blades 73 connected to the outer wall of the bottom of the rotating rod 72, and a heating plate 79 connected to the inside of the stirring blade 73;

[0060] The top of the rotating rod 72 is connected to a synchronous wheel 74, and multiple synchronous wheels 74 are meshed and connected through a synchronous belt 78. The top of one synchronous wheel 74 is connected to a first bevel gear 75, one side of the first bevel gear 75 is meshed and connected to a second bevel gear 76, and one side of the second bevel gear 76 is connected to a pinion 77, and the pinion 77 cooperates with the rack 44.

[0061] It should be noted that, in the embodiment, the phosphating solution is heated by the heating plate 79, and the pinion 77 is driven to rotate by the rack 44 descending, thereby rotating the second bevel gear 76, and then rotating the first bevel gear 75 and the synchronous wheel 74, and the multiple synchronous wheels 74 are rotated synchronously by the synchronous belt 78, thereby rotating the rotating rod 72, and then driving the stirring blade 73 to rotate, so as to make the temperature of the phosphating solution more uniform and accelerate the phosphating rate.

[0062] For examples, please refer to the attached Figure 4 In S1 , the cleaning mechanism 50 includes a water tank 51 connected to the top of the processing table 10 and a plurality of water guns 52 connected to multiple sides of the water tank 51 .

[0063] It should be noted that, in the embodiment, the clean water in the water tank 51 is sprayed onto the surface of the die casting by the water gun 52, so as to clean the die casting.

[0064] For examples, please refer to the attached Figure 4 In S3, the drying mechanism 60 includes a sealing box 61 connected to the top of the processing table 10, a heating tube 64 connected to the bottom of the sealing box 61, a fourth motor 62 connected to the bottom of the sealing box 61 and a fan blade 63 connected to the driving end of the fourth motor 62, and the fan blade 63 is located at the bottom of the heating tube 64.

[0065] It should be noted that, in the embodiment, the air is heated by the heating tube 64, and the fan blades 63 are driven to rotate by the fourth motor 62, so that the hot air is blown to the surface of the die casting, thereby improving the drying speed.

[0066] For examples, please refer to the attached Figure 4 The two Z-shaped plates 34 are connected by a limiting rod 341 , and the limiting rod 341 is slidably connected to the hole body at the top of the L-shaped clamping plate 43 .

[0067] It should be noted that, in the embodiment, the limiting rod 341 is convenient for limiting the position of the L-shaped clamping plate 43 to prevent the L-shaped clamping plate 43 from rotating with the bidirectional screw rod 42 .

[0068] For examples, please refer to the attached Figure 8 The bottom of the synchronous seat 82 is rotatably connected to a plurality of rollers 821 .

[0069] It should be noted that, in the embodiment, the roller 821 reduces the friction between the synchronous seat 82 and the track 81 , making it easier for the synchronous seat 82 to slide.

[0070] The specific operation mode of the present invention is as follows: firstly, a suitable aluminum alloy die-casting is selected, and the bidirectional screw 42 is driven to rotate by the third motor 41, so that the two L-shaped clamping plates 43 move in opposite directions, thereby clamping the die-casting, and then the second motor 32 drives the second screw 33 to rotate, so that the Z-shaped plate 34 is raised and lowered to adjust the height of the die-casting, and the first motor 21 drives the first screw 22 to rotate, thereby driving the moving seat 23 to move, so that the die-casting moves into the cleaning mechanism 50;

[0071] The clean water in the water tank 51 is sprayed onto the surface of the die casting by the water gun 52, so as to remove the stains on the surface of the die casting;

[0072] The die casting is transferred to the drying mechanism 60, the air is heated by the heating pipe 64, and the fan blade 63 is driven to rotate by the fourth motor 62, so that the hot air is blown to the surface of the die casting;

[0073] The dried die casting is transferred to the phosphating device 70, at which time the rack 44 is meshed with the pinion 77, and the L-shaped clamping plate 43 and the die casting are lifted and lowered by the Z-shaped plate 34, so that the rack 44 is lifted and lowered, and the pinion 77 is rotated by the lifting of the rack 44, so that the second bevel gear 76 is rotated, and then the first bevel gear 75 and the synchronous wheel 74 are rotated, and the multiple synchronous wheels 74 are rotated synchronously by the synchronous belt 78, so that the rotating rod 72 is rotated, and then the stirring blade 73 is driven to rotate, so as to achieve stirring of the phosphating solution, and at the same time, the phosphating solution is heated by the heating plate 79, so that the temperature and concentration distribution of the phosphating solution are uniform, so that the die casting can be phosphated uniformly;

[0074] After the phosphating treatment is completed, if it is observed that the phosphating effect is poor, the die casting is returned to the cleaning mechanism 50 for cleaning, and the operations S3 and S4 are repeated until the die casting passes the phosphating treatment.

[0075] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A surface treatment process for aluminum alloy die castings, characterized in that: The following steps are involved: S1, selecting a suitable aluminum alloy die-casting, fixing the die-casting on a processing table (10) through a clamping mechanism (40), and moving the die-casting into a cleaning mechanism (50) through a height adjustment device (30) and a moving device (20); S2, using a cleaning mechanism (50) to remove stains on the surface of the die casting; S3, transferring the die casting to a drying mechanism (60) for drying; S4, transferring the dried die casting to a phosphating device (70) for phosphating treatment, while adjusting the temperature of the phosphating solution; S5, after the phosphating treatment is completed, if it is observed that the phosphating effect is poor, the die casting is returned to the cleaning mechanism (50) for cleaning, and the operations of S3 and S4 are repeated until the die casting passes the phosphating treatment.

2. The surface treatment process of aluminum alloy die casting according to claim 1, characterized in that: In S1, the top of the processing table (10) is connected to a moving device (20), and the moving device (20) includes a first motor (21) connected to one side of the top of the processing table (10), a first screw rod (22) connected to the driving end of the first motor (21), and a moving seat (23) connected to one side of the first screw rod (22).

3. The surface treatment process of aluminum alloy die casting according to claim 2, characterized in that: A track assembly (80) is connected to one side of the top of the processing table (10), and the track assembly (80) comprises a track (81) connected to the top of the processing table (10) and a synchronous seat (82) slidably connected to the top of the track (81), and a height adjustment device (30) is connected to the top of the synchronous seat (82) and the movable seat (23).

4. The surface treatment process of aluminum alloy die casting according to claim 3 is characterized in that: The height adjustment device (30) comprises a fixed frame (31) connected to the synchronous seat (82) and the top of the movable seat (23), a second motor (32) connected to the top of the fixed frame (31), a second screw rod (33) connected to the driving end of the second motor (32), and a Z-shaped plate (34) penetratingly connected to the bottom of the second screw rod (33).

5. The surface treatment process of aluminum alloy die casting according to claim 4, characterized in that: One side of the top of the Z-shaped plate (34) is connected to a clamping mechanism (40), the clamping mechanism (40) comprises a bidirectional screw rod (42) connecting the two Z-shaped plates (34), an L-shaped clamping plate (43) connected to both sides of the bidirectional screw rod (42) and a third motor (41) connected to one side of the bidirectional screw rod (42), and both sides of the bidirectional screw rod (42) are rotatably connected to the Z-shaped plate (34); One side of the bottom of the L-shaped clamping plate (43) is connected to a rack (44), and the rack (44) cooperates with the phosphating device (70).

6. The surface treatment process of aluminum alloy die casting according to claim 5, characterized in that: The phosphating device (70) comprises a solution tank (71) connected to one side of the top of the processing table (10), a rotating rod (72) rotatably connected to multiple corners of the bottom of the solution tank (71), multiple stirring blades (73) connected to the outer wall of the bottom of the rotating rod (72), and a heating plate (79) connected to the inside of the stirring blade (73); The top of the rotating rod (72) is connected to a synchronous wheel (74), and a plurality of the synchronous wheels (74) are meshedly connected via a synchronous belt (78). The top of one of the synchronous wheels (74) is connected to a first bevel gear (75), one side of the first bevel gear (75) is meshedly connected to a second bevel gear (76), and one side of the second bevel gear (76) is connected to a pinion gear (77), and the pinion gear (77) matches the rack (44).

7. The surface treatment process of aluminum alloy die casting according to claim 1, characterized in that: In the step S1, the cleaning mechanism (50) comprises a water tank (51) connected to the top of the processing table (10) and a plurality of water guns (52) connected to a plurality of side surfaces of the water tank (51).

8. The surface treatment process of aluminum alloy die casting according to claim 1, characterized in that: In S3, the drying mechanism (60) includes a sealing box (61) connected to the top of the processing table (10), a heating tube (64) connected to the bottom of the sealing box (61), a fourth motor (62) connected to the bottom of the sealing box (61) and a fan blade (63) connected to the driving end of the fourth motor (62), and the fan blade (63) is located at the bottom of the heating tube (64).

9. The surface treatment process of aluminum alloy die casting according to claim 5, characterized in that: The two Z-shaped plates (34) are connected via a limiting rod (341), and the limiting rod (341) is slidably connected to a hole at the top of the L-shaped clamping plate (43).

10. The surface treatment process of aluminum alloy die casting according to claim 3, characterized in that: The bottom of the synchronous seat (82) is rotatably connected to a plurality of rollers (821).

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