Manufacturing process of tripod of roller washing machine

Abstract

The invention is suitable for the technical field of washing machine tripod production, and provides a manufacturing process of a roller washing machine tripod, which comprises the following steps: blank cutting: cutting the appearance of a blank of a to-be-formed product through a laser cutting machine; blank forming, wherein the cut blank is put into an oil press to be subjected to deep drawing forming through a mold; the shaft and the deep drawing forming part are placed on a welding tool to be positioned, and the welding part is formed through laser welding; electrophoresis: shielding the shaft sleeve for the shaft, carrying out surface treatment through an assembly line, carrying out anodic electrophoresis, and cooling and drying; riveting the fixing block and the product subjected to electrophoresis by using a rivet through a pressing machine; a stamping welding process is adopted, energy consumption is reduced, compared with an aluminum ingot raw material, a cold plate is adopted, the cost is reduced, the strength is higher after welding forming, deformation is not prone to occurring, the product consistency is high, automatic laser welding is achieved, and compared with an aluminum die-casting process, the technical requirement for workers is lower.

Description

Technical Field

[0001] The present invention belongs to the technical field of the production of the tripod of a washing machine, and particularly relates to a manufacturing process of a tripod for a drum washing machine. Background Art

[0002] The tripod of a washing machine is a key component in a rolling fully automatic washing machine. Its function is to fix the washing machine and keep it balanced and stable, so that the washing machine is not easy to shake or generate noise during operation. The function of the tripod of a washing machine has an important impact on the performance and service life of the washing machine. Existing tripods all place the shaft in the mold in the form of an insert, and after injecting high-temperature aluminum liquid at 660 °C into the mold under high pressure by an aluminum die-casting machine, it is cooled and then demolded.

[0003] Existing problems: The tripods formed by aluminum die-casting are susceptible to defects such as air holes and cracks due to factors such as the temperature of the aluminum liquid, the temperature of the mold, the purity of the aluminum, the die-casting pressure, the feeding system and the exhaust system of the mold, which often cause problems such as fracture of the product when stressed. Summary of the Invention

[0004] The present invention provides a manufacturing process of a tripod for a drum washing machine, aiming to solve the problems that the tripods formed by existing aluminum die-casting are susceptible to defects such as air holes and cracks due to factors such as the temperature of the aluminum liquid, the temperature of the mold, the purity of the aluminum, the die-casting pressure, the feeding system and the exhaust system of the mold, and often cause problems such as fracture of the product when stressed.

[0005] The present invention is implemented as follows. A manufacturing process of a tripod for a drum washing machine includes the following steps:

[0006] 1) Blank cutting: Cut the outer shape of the required formed product blank by a laser cutting machine;

[0007] 2) Blank forming: Place the cut blank in a hydraulic press and draw it into shape through a mold;

[0008] 3) Welding: Position the shaft and the drawn part on a welding fixture, and the welding part is formed by laser welding;

[0009] 4) Electrophoresis: First shield the shaft with a shaft sleeve, then perform surface treatment through an assembly line, and then perform anodic electrophoresis and then cool and dry. The thickness of the electrophoretic paint is 28 - 40 um;

[0010] 5) Rivet the fixed block and the electrophoresed product with a rivet through a press;

[0011] 6) Install the protective sleeve on the riveted product. The protective sleeve can be made of plastic.

[0012] Preferably, the power of the laser cutting machine is 2.5 - 3.5 Kw.

[0013] Preferably, the surface treatment is in sequence of degreasing - hot water washing - rust removal - cold water washing - phosphating - hot water washing - passivation.

[0014] Preferably, the electrolyte composition of the anodic electrophoresis is H08 - 1 black electrophoretic paint, the mass fraction of solid content is 9% - 12%, the mass fraction of distilled water is 88% - 91%, the voltage is 60 - 80V, the time is 2 - 2.5min, the temperature of the paint solution is 15 - 35°C, and the pH value of the paint solution is 8 - 8.5.

[0015] Preferably, the drying is carried out in an oven at a temperature of 160 - 170°C for 40 - 60min.

[0016] Preferably, the laser welding equipment used for the laser welding includes:

[0017] A frame;

[0018] A set of upper welding components installed on the frame for welding the shaft and the top of the bracket;

[0019] Three groups of side welding components installed on the frame 1 at equal circumferential intervals for welding between adjacent brackets and between the three brackets and the side wall of the shaft;

[0020] A linkage component connected between the upper welding component and the side welding component to enable the upper welding component and the side welding component to operate simultaneously.

[0021] Preferably, the upper welding component includes:

[0022] An upper laser welding head;

[0023] A first driving mechanism for driving the upper laser welding head to rotate around the axis of the tripod.

[0024] Preferably, the first driving mechanism includes:

[0025] A mounting shaft rotatably installed on the frame, and the axis of the mounting shaft coincides with the axis of the tripod;

[0026] A driving body fixed to the bottom end of the mounting shaft, and the upper laser welding head is installed on the lower surface of the driving body;

[0027] A power component for driving the mounting shaft to rotate.

[0028] Preferably, the side welding component includes:

[0029] A side laser welding head;

[0030] A second driving mechanism for driving the side laser welding head to move to form an L-shaped weld seam.

[0031] Preferably, the second driving mechanism includes:

[0032] A turntable rotatably mounted on the lower surface of the frame;

[0033] A mounting sleeve fixed to the end face of the turntable;

[0034] A mounting rod passing through the mounting sleeve. One end of the mounting rod close to the driving body is rotatably mounted with a movable sleeve. The movable sleeve is sleeved on a vertical guide rod. A first limiting block is provided at the bottom end of the guide rod. The side laser welding head is mounted on the movable sleeve;

[0035] A compression spring sleeved on the mounting rod and located between the mounting sleeve and the movable sleeve. One end of the compression spring abuts against the mounting sleeve, and the other end abuts against a convex ring provided on the mounting rod;

[0036] A movable block is sleeved on the guide rod. The top end of the guide rod is slidably connected to an adjusting plate above the frame. Vertical adjusting screws are respectively passed through both ends of the adjusting plate. The adjusting screws are threadedly connected to the adjusting plate and rotatably connected to the frame. A guide sleeve is mounted on the frame. The length direction of the guide sleeve is the same as the sliding direction of the guide rod. The guide rod and the guide sleeve are arranged in a front-back dislocation manner. The guide sleeve movably passes through the movable block and second limiting blocks are fixed at both ends. The second limiting blocks are slidably connected to the frame. A threaded rod is threadedly passed through the guide sleeve along its length direction. One end of the threaded rod away from the movable block is rotatably connected to the frame and fixed with a bevel gear. A bevel gear ring is rotatably mounted on the upper surface of the frame. The bevel gear ring can be meshed with all the bevel gears. The bevel gear ring is fixed to the frame by fastening screws. Loosening the fastening screws can rotate the bevel gear ring.

[0037] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:

[0038] The manufacturing process of the tripod of the drum washing machine provided by the present invention adopts a stamping and welding process, which reduces energy consumption. Using cold plates saves raw material costs compared with aluminum ingots. After welding and forming, it has higher strength, is not easy to deform, and has relatively high product consistency. Automated laser welding has lower technical requirements for workers compared with the aluminum die-casting process, improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic structural diagram of a tripod of a drum washing machine provided by the present invention.

[0040] Figure 2 is a top view of a tripod of a drum washing machine provided by the present invention.

[0041] Figure 3 is a bottom view of a tripod of a drum washing machine provided by the present invention.

[0042] Figure 4 isFigure 3 The A-A cross-sectional view in

[0043] Figure 5 is the process flow chart of manufacturing a tripod for a drum washing machine provided by the present invention.

[0044] Figure 6 is the structural schematic diagram of the laser welding equipment provided by the present invention.

[0045] Figure 7 is Figure 6 the enlarged view at position A in

[0046] Figure 8 is Figure 6 the enlarged view at position B in

[0047] Annotation of reference numerals: 100, shaft; 200, shaft sleeve; 300, bracket; 400, fixing block; 500, sheath; 600, rivet; 1, frame; 2, adjusting screw; 3, adjusting plate; 4, bevel gear; 5, threaded rod; 6, guide sleeve; 7, movable block; 8, guide rod; 9, driving gear; 10, stepping motor; 11, driven gear; 12, fastening screw; 13, bevel gear ring; 14, rotating shaft; 15, worm; 16, turntable; 17, mounting rod; 18, mounting sleeve; 19, compression spring; 20, convex ring; 21, first limiting block; 22, movable sleeve; 23, side laser welding head; 24, lead screw; 25, driving body; 26, upper laser welding head; 27, threaded sleeve; 28, driven body; 29, second limiting block. Detailed implementation manners

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order.

[0049] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0050] Embodiment 1

[0051] An embodiment of the present invention provides a tripod for a drum washing machine, as Figures 1-4 shown, including a shaft 100, a shaft sleeve 200, a bracket 300, a fixing block 400, a sheath 500 and a rivet 600. The shaft sleeve 200 is sleeved on the shaft 100. The bracket 300 is a stretch-formed part. All three brackets 300 are fixedly connected to the shaft 100. In this embodiment, welding is preferably used for fixation. The fixing block 400 is fixed to the end of the bracket 300 away from the shaft 100 by the rivet 600, and then the sheath 500 is sleeved on. The manufacturing process of the tripod for the drum washing machine, as Figure 5 shown, includes the following steps:

[0052] Blank cutting: Cut the blank shape of the required formed product through a laser cutting machine. The power of the laser cutting machine is 2.5 Kw;

[0053] Blank forming: Put the cut blank into a hydraulic press and draw it into shape through a die;

[0054] Welding: Position the shaft 100 and the drawn part (bracket 300) on a welding fixture, and the welding part is formed by laser welding;

[0055] Electrophoresis: First, shield the shaft 100 with the shaft sleeve 200, and then perform surface treatment through an assembly line (in sequence: degreasing - hot water washing - rust removal - cold water washing - phosphating - hot water washing - passivation), and then perform anodic electrophoresis (the electrolyte composition is H08-1 black electrophoretic paint, the solid content mass fraction is 9%, the distilled water mass fraction is 88%, the voltage is 60V, the time is 2min, the paint solution temperature is 15°C, the paint solution PH value is 8), and then cool and dry (bake in an oven at 160°C for 40min). The thickness of the electrophoretic paint is 28um;

[0056] Rivet the fixing block 400 and the electrophoresed product with the rivet 600 through a press;

[0057] Install the sheath 500 on the riveted product.

[0058] Embodiment 2

[0059] An embodiment of the present invention provides a tripod for a drum washing machine, as Figures 1-4 shown, including a shaft 100, a shaft sleeve 200, a bracket 300, a fixing block 400, a sheath 500 and a rivet 600. The shaft sleeve 200 is sleeved on the shaft 100. The bracket 300 is a stretch-formed part. All three brackets 300 are fixedly connected to the shaft 100. In this embodiment, welding is preferably used for fixation. The fixing block 400 is fixed to the end of the bracket 300 away from the shaft 100 by the rivet 600, and then the sheath 500 is sleeved on. The manufacturing process of the tripod for the drum washing machine, as Figure 5As shown, it includes the following steps:

[0060] Blank cutting: Cut the blank shape of the required formed product through a laser cutting machine, and the power of the laser cutting machine is 2.8 Kw;

[0061] Blank forming: Place the cut blank into a hydraulic press and draw it into shape through a mold;

[0062] Welding: Position the shaft 100 and the drawn forming part (bracket 300) on the welding fixture, and the welding part is formed by laser welding;

[0063] Electrophoresis: First, shield the shaft 100 with the bushing 200, then perform surface treatment through an assembly line (in sequence: degreasing - hot water washing - rust removal - cold water washing - phosphating - hot water washing - passivation), and then perform anodic electrophoresis (the electrolyte composition is H08-1 black electrophoretic paint, the solid content mass fraction is 10%%, the distilled water mass fraction is 89%, the voltage is 65V, the time is 2.1 min, the paint solution temperature is 20°C, the paint solution pH value is 8.1), and then cool and dry (bake in an oven at 162°C for 45 min), and the thickness of the electrophoretic paint is 32 um;

[0064] Rivet the fixing block 400 and the electrophoresed product with a rivet 600 through a press;

[0065] Install the sheath 500 on the riveted product.

[0066] Example 3

[0067] The embodiment of the present invention provides a tripod for a drum washing machine, as Figures 1-4 shown, including a shaft 100, a bushing 200, a bracket 300, a fixing block 400, a sheath 500 and a rivet 600. The bushing 200 is sleeved on the shaft 100. The bracket 300 is a drawn forming part, and the three brackets 300 are all fixedly connected to the shaft 100. In this embodiment, welding fixation is preferably adopted. Fix the fixing block 400 to the end of the bracket 300 away from the shaft 100 with a rivet 600 and then sleeve on the sheath 500. The manufacturing process of the tripod for the drum washing machine, as Figure 5 shown, includes the following steps:

[0068] Blank cutting: Cut the blank shape of the required formed product through a laser cutting machine, and the power of the laser cutting machine is 3 Kw;

[0069] Blank forming: Place the cut blank into a hydraulic press and draw it into shape through a mold;

[0070] Welding: Position the shaft 100 and the drawn forming part (bracket 300) on the welding fixture, and the welding part is formed by laser welding;

[0071] Electrophoresis: First, shield the shaft 100 with the bushing 200, then perform surface treatment through the assembly line (in sequence: degreasing - hot water wash - rust removal - cold water wash - phosphating - hot water wash - passivation), and then perform anodic electrophoresis (the electrolyte composition is H08-1 black electrophoretic paint, the solid content mass fraction is 10.5%, the distilled water mass fraction is 89.5%, the voltage is 70V, the time is 2.25 min, the paint solution temperature is 25 °C, and the paint solution pH value is 8.3), and then cool and dry (bake in the oven at 165 °C for 50 min). The thickness of the electrophoretic paint is 34 μm;

[0072] Rivet the fixed block 400 and the electrophoresed product together with a rivet 600 using a press;

[0073] Install the sheath 500 on the riveted product.

[0074] Example 4

[0075] The embodiment of the present invention provides a tripod for a drum washing machine, as Figures 1-4 shown, including a shaft 100, a bushing 200, a bracket 300, a fixed block 400, a sheath 500, and a rivet 600. The bushing 200 is sleeved on the shaft 100. The bracket 300 is a stretch-formed part, and all three brackets 300 are fixedly connected to the shaft 100. In this embodiment, welding fixation is preferably used. Fix the fixed block 400 to the end of the bracket 300 away from the shaft 100 with a rivet 600 and then put on the sheath 500. The manufacturing process of the tripod for the drum washing machine, as Figure 5 shown, includes the following steps:

[0076] Blank cutting: Cut the outer shape of the required formed product blank with a laser cutting machine. The power of the laser cutting machine is 3.2 Kw;

[0077] Blank forming: Place the cut blank in an oil press and draw it into shape through a die;

[0078] Welding: Position the shaft 100 and the drawn part (bracket 300) on the welding fixture, and the welding part is formed by laser welding;

[0079] Electrophoresis: First, shield the shaft 100 with the bushing 200, then perform surface treatment through the assembly line (in sequence: degreasing - hot water wash - rust removal - cold water wash - phosphating - hot water wash - passivation), and then perform anodic electrophoresis (the electrolyte composition is H08-1 black electrophoretic paint, the solid content mass fraction is 11%, the distilled water mass fraction is 90%, the voltage is 75V, the time is 2.4 min, the paint solution temperature is 30 °C, and the paint solution pH value is 8.4), and then cool and dry (bake in the oven at 168 °C for 55 min). The thickness of the electrophoretic paint is 37 μm;

[0080] Rivet the fixed block 400 and the electrophoresed product together with a rivet 600 using a press;

[0081] Install the sheath 500 on the riveted product.

[0082] Example 5

[0083] An embodiment of the present invention provides a tripod for a drum washing machine, as Figures 1-4 shown, including a shaft 100, a bushing 200, a bracket 300, a fixed block 400, a sheath 500 and a rivet 600. The bushing 200 is sleeved on the shaft 100. The bracket 300 is a stretch-formed part. All three brackets 300 are fixedly connected to the shaft 100. In this embodiment, welding is preferably used for fixation. Fix the fixed block 400 to the end of the bracket 300 away from the shaft 100 with a rivet 600 and then install the sheath 500. The manufacturing process of the tripod for the drum washing machine, as Figure 5 shown, includes the following steps:

[0084] Blank cutting: Cut the outer shape of the required formed product blank with a laser cutting machine. The power of the laser cutting machine is 3.5 Kw;

[0085] Blank forming: Place the cut blank in an oil press and draw it into shape through a mold;

[0086] Welding: Position the shaft 100 and the drawn part (bracket 300) on a welding fixture, and the welding part is formed by laser welding;

[0087] Electrophoresis: First, shield the shaft 100 with the bushing 200, then perform surface treatment through an assembly line (in sequence: degreasing - hot water washing - rust removal - cold water washing - phosphating - hot water washing - passivation), and then perform anodic electrophoresis (the electrolyte composition is H08-1 black electrophoretic paint, the solid content mass fraction is 12%, the distilled water mass fraction is 91%, the voltage is 80V, the time is 2.5 min, the paint solution temperature is 35°C, the paint solution PH value is 8.5), and then cool and dry (bake in an oven at 170°C for 60 min). The thickness of the electrophoretic paint is 40um;

[0088] Rivet the fixed block 400 and the electrophoresed product together with a rivet 600 using a press;

[0089] Install the sheath 500 on the riveted product.

[0090] Example 6

[0091] An embodiment of the present invention provides a laser welding device for the laser welding process in the above Examples 1-5, as Figures 6-8 shown, the laser welding device includes:

[0092] Frame 1;

[0093] A set of upper welding components installed on the frame 1 for welding the shaft 100 and the top of the bracket 300;

[0094] Three sets of side welding components installed on the frame 1 at equal circumferential intervals for welding between adjacent brackets 300 and between the three brackets 300 and the side wall of the shaft 100;

[0095] A linkage component connected between the upper welding component and the side welding component to enable the upper welding component and the side welding component to operate simultaneously.

[0096] During operation, the upper welding component and the side welding component operate simultaneously, shortening the welding time, improving work efficiency. The multiple welding components weld simultaneously to disperse the heat input and cool synchronously, reducing the risk of superposition in the heat affected zone and optimizing the welding quality.

[0097] Among them, the upper welding component includes:

[0098] An upper laser welding head 26;

[0099] A first driving mechanism for driving the upper laser welding head 26 to rotate around the axis of the tripod;

[0100] The upper laser welding head 26 is driven by the first driving mechanism to rotate around the axis, and the shaft 100 and the top of the bracket 300 are welded and fixed.

[0101] Furthermore, the first driving mechanism includes:

[0102] A mounting shaft rotatably installed on the frame 1, which can be rotatably installed through a bearing, and the axis of the mounting shaft coincides with the axis of the tripod;

[0103] A driving body 25 fixed to the bottom end of the mounting shaft, which can be fixed by welding, and the upper laser welding head 26 is installed on the lower surface of the driving body 25;

[0104] A power component for driving the mounting shaft to rotate. In this embodiment, the power component includes a stepping motor 10, a driving gear 9 and a driven gear 11. The stepping motor 10 is fixedly installed on the frame 1, which can be fixed by screws. A driving gear 9 is fixed on the output shaft of the stepping motor 10, and a driven gear 11 meshing with the driving gear 9 is fixedly installed on the mounting shaft;

[0105] During operation, the stepping motor 10 is started, the stepping motor 10 drives the driving gear 9 to rotate, the driving gear 9 drives the mounting shaft to rotate through the driven gear 11, the mounting shaft drives the driving body 25 to rotate, and the driving body 25 drives the upper laser welding head 26 to rotate.

[0106] Further, a lead screw 24 is rotatably installed on the lower surface of the active body 25, which can be rotatably installed through a bearing. A threaded sleeve 27 is threadedly connected to the lead screw 24. The threaded sleeve 27 is slidably connected to the lower surface of the active body 25. The upper laser welding head 26 is installed on the threaded sleeve 27, which can be installed through a ball joint to adjust the angle of the upper laser welding head 26. By rotating the lead screw 24, the lead screw 24 drives the threaded sleeve 27 to rotate, and the threaded sleeve 27 drives the upper laser welding head 26 to move, adjusting the position of the laser welding head, thereby adjusting the welding position.

[0107] In this embodiment, the side welding assembly includes:

[0108] A side laser welding head 23;

[0109] A second driving mechanism for driving the side laser welding head 23 to move to form an L-shaped weld seam.

[0110] During operation, the second driving mechanism drives the side laser welding head 23 to move, and the side laser welding head 23 welds between adjacent brackets 300 and between the bracket 300 and the side wall of the shaft 100 to form an L-shaped weld seam.

[0111] Further, the second driving mechanism includes:

[0112] A turntable 16 rotatably installed on the lower surface of the frame 1, which can be rotatably installed through a bearing and a bearing seat;

[0113] An installation sleeve 18 fixed to the end face of the turntable 16;

[0114] An installation rod 17 passing through the installation sleeve 18. One end of the installation rod 17 close to the active body 25 is rotatably installed with a movable sleeve 22. The movable sleeve 22 is sleeved on the vertical guide rod 8. A first limit block 21 is provided at the bottom end of the guide rod 8 for limiting the downward stroke of the movable sleeve 22. The side laser welding head 23 is installed on the movable sleeve 22, which can be installed through a ball joint to adjust the angle of the side laser welding head 23;

[0115] A compression spring 19 sleeved on the installation rod 17 and located between the installation sleeve 18 and the movable sleeve 22. One end of the compression spring 19 abuts against the installation sleeve 18, and the other end abuts against a convex ring 20 provided on the installation rod 17;

[0116] A movable block 7 is sleeved on the guide rod 8. The top end of the guide rod 8 is slidably connected to an adjusting plate 3 above the frame 1. Vertical adjusting screws 2 are inserted through both ends of the adjusting plate 3. The adjusting screws 2 are threadedly connected to the adjusting plate 3 and rotatably connected to the frame 1. A guide sleeve 6 is installed on the frame 1. The length direction of the guide sleeve 6 is the same as the sliding direction of the guide rod 8. The guide rod 8 and the guide sleeve 6 are arranged in a front-back offset manner. The guide sleeve 6 movably penetrates through the movable block 7 and second limit blocks 29 are fixed at both ends. The second limit blocks 29 are slidably connected to the frame 1. A threaded rod 5 is threadedly inserted along the length direction of the guide sleeve 6. One end of the threaded rod 5 away from the movable block 7 is rotatably connected to the frame 1 and a bevel gear 4 is fixed. A bevel gear ring 13 is rotatably installed on the upper surface of the frame 1. The bevel gear ring 13 can mesh with all the bevel gears 4. The bevel gear ring 13 is fixed to the frame 1 by fastening screws 12. Loosening the fastening screws 12 can rotate the bevel gear ring 13.

[0117] It should be explained that as Figure 1 shown, when the turntable 16 rotates, it drives the mounting sleeve 18 to rotate. The mounting sleeve 18 drives the mounting rod 17 to rotate. The mounting rod 17 drives the movable sleeve 22 to move downward. The movable sleeve 22 drives the side laser welding head 23 to move downward to weld the bracket 300 to the outer side wall of the shaft 100. When the movable sleeve 22 is blocked by the first limit block 21, then the mounting rod 17 drives the guide rod 8 to move along the guide sleeve 6 through the movable sleeve 22 to weld adjacent brackets 300. The height of the adjusting plate 3 can be changed by rotating the adjusting screw 2, so as to drive the guide rod 8 to lift and lower, thereby adjusting the position of the first limit block 21. The position of the second limit block 29 can also be adjusted by rotating the bevel gear ring 13. The bevel gear ring 13 drives the bevel gear 4 to rotate. The bevel gear 4 drives the threaded rod 5 to rotate. The threaded rod 5 drives the guide sleeve 6 to move, so as to adjust the position of the second limit block 29. Such adjustment is to be able to adjust the specific size of the L-shaped weld according to the sizes of the shaft 100 and the bracket 300, and improve the adaptability.

[0118] In a specific implementation, the linkage assembly includes:

[0119] A rotating shaft 14 arranged above the turntable 16 of each group of side positioning assemblies. The rotating shaft 14 is rotatably connected to the lower surface of the frame 1 and can be rotatably connected through a bearing;

[0120] A worm 15 fixed to the rotating shaft 14. A worm wheel part meshing with the worm 15 is arranged on the turntable 16;

[0121] The driven body 28 is fixed to one end of the worm 15 close to the driving body 25. The driving body 25 and the driven body 28 form a friction pair. When the driving body 25 rotates, it can drive the driven body 28 to rotate. Preferably, both the driving body 25 and the driven body 28 are conical and the side walls of the two are in tight contact. When the driving body 25 rotates, it drives the driven body 28 to rotate through friction. The driven body 28 drives the worm 15 to rotate through the rotating shaft 14, and the worm 15 drives the turntable 16 to rotate. A rubber layer with anti-slip patterns can be provided on the side walls of the driving body 25 and the driven body 28 to increase the friction force.

[0122] In this embodiment, the working principle of the laser welding device is as follows: After fixing the shaft 100 and the bracket 300, start the stepping motor 10. The stepping motor 10 drives the driving gear 9 to rotate. The driving gear 9 drives the mounting shaft to rotate through the driven gear 11. The mounting shaft drives the driving body 25 to rotate. The driving body 25 drives the upper laser welding head 26 to rotate, and welds and fixes the shaft 100 and the top of the bracket 300. At the same time, when the driving body 25 rotates, it drives the driven body 28 to rotate. The driven body 28 drives the worm 15 to rotate through the rotating shaft 14. The worm 15 drives the turntable 16 to rotate. The turntable 16 drives the mounting sleeve 18 to rotate. The mounting sleeve 18 drives the mounting rod 17 to rotate. The mounting rod 17 drives the movable sleeve 22 to move downward. The movable sleeve 22 drives the side laser welding head 23 to move downward, and welds the outer side wall of the bracket 300 and the shaft 100. When the movable sleeve 22 is blocked by the first limit block 21, then the mounting rod 17 drives the guide rod 8 to move along the guide sleeve 6 through the movable sleeve 22, and welds the adjacent brackets 300 to form an L-shaped weld. After the driving body 25 rotates 360 degrees, the upper laser welding head 26 and the side laser welding head 23 are closed. The stepping motor 10 rotates in reverse to drive the driving body 25 to rotate back to its original position, so that the upper laser welding head 26 and the side laser welding head 23 are reset, preparing for the next welding. Thus, automatic synchronous welding is achieved, improving the work efficiency. The mechanical structure of this application is ingenious, can be adaptively adjusted according to different situations, and has irreplaceability in terms of reliability, cost, environmental adaptability, etc., and is especially suitable for deterministic, high-load, and long-cycle scenarios.

[0123] Comparative Example 1: Existing aluminum die-cast tripod products.

[0124] Performance test

[0125] First, conduct strength tests on the tripod products of Examples 1-5 and Comparative Example 1. The results are as follows in the table:

[0126] Product Strength (KN) Comparative Example 1 (Crushing Strength) 19.5 Example 1 (Deformation Strength) 35.5 Example 2 (Deformation Strength) 35.6 Example 3 (Deformation Strength) 35.9 Example 4 (Deformation Strength) 35.8 Example 5 (Deformation Strength) 35.6

[0127] From the above results, it can be seen that the manufacturing process of the present invention can improve the strength of the product.

[0128] II. Place the tripod products of Examples 1-5 in a bathroom environment at 35-45°C with a humidity above 95% and leave them for 30 days without rusting.

[0129] III. Place the tripod products of Examples 1-5 in warm water at 40°C and soak them for 30 days without rusting.

[0130] IV. Conduct a salt spray test on the tripod products of Examples 1-5 for 196 hours, with corrosion less than 1 mm.

[0131] V. Conduct a destructive load test on the tripod products of Examples 1-5: The universal testing machine applies a load at the center of the tripod at a speed of 50 mm / min. The load that the tripod can withstand is above 1000 Kg, meeting the requirements of the drawings for each rotation speed and capacity segment.

[0132] VI. Conduct a torsional strength test on the tripod products of Examples 1-5: After the tripod is fixed with three screws, apply 1000 Kgf.cm at the end of the main shaft. The main shaft does not idle and the tripod is not damaged.

[0133] It should be noted that for the foregoing embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps may be carried out in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0134] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict, make combinations, additions, deletions, or other adjustments to the features in the embodiments of the present invention according to the circumstances without creative work, so as to obtain different technical solutions that are essentially not divorced from the concept of the present invention, and these technical solutions also fall within the scope of protection of the present invention.

Claims

1. A manufacturing process for a tripod of a drum washing machine, characterized in that, It includes the following steps: 1) Blank cutting: Cut the blank contour of the required formed product with a laser cutting machine; 2) Blank forming: Place the cut blank in a hydraulic press and draw it into shape through a die; 3) Welding: Position the shaft and the drawn part on a welding fixture, and the welding part is formed by laser welding; 4) Electrophoresis: First shield the shaft with a bushing, then perform surface treatment through an assembly line, and then perform anodic electrophoresis and cool and dry; 5) Rivet the fixed block and the electrophoresed product with a rivet through a press; 6) Install the protective sleeve on the riveted product.

2. The manufacturing process of the tripod of the drum washing machine according to claim 1, characterized in that, In the step 1), the power of the laser cutting machine is 2.5 - 3.5 Kw.

3. The manufacturing process of the tripod of the drum washing machine according to claim 1, characterized in that, In the step 4), the surface treatment is in sequence of degreasing - hot water washing - rust removal - cold water washing - phosphating - hot water washing - passivation.

4. The manufacturing process of the tripod of the drum washing machine according to claim 1, characterized in that, In the step 4), the electrolyte composition of the anodic electrophoresis is H08 - 1 black electrophoretic paint, the mass fraction of the solid content is 9% - 12%, the mass fraction of distilled water is 88% - 91%, the voltage is 60 - 80 V, the time is 2 - 2.5 min, the temperature of the paint solution is 15 - 35 °C, and the pH value of the paint solution is 8 - 8.

5.

5. The manufacturing process of the tripod of the drum washing machine according to claim 1, characterized in that, In the step 4), the drying is carried out in an oven at a temperature of 160 - 170 °C for 40 - 60 min.

6. The manufacturing process of the tripod of the drum washing machine according to claim 1, characterized in that, The laser welding equipment used for the laser welding includes: A frame; A set of upper welding components installed on the frame for welding the shaft and the top of the bracket; Three groups of side welding components circumferentially and equally spaced on the frame 1 for welding between adjacent brackets and between the three brackets and the side wall of the shaft; A linkage component connected between the upper welding component and the side welding component to enable the upper welding component and the side welding component to operate simultaneously.

7. The manufacturing process of the tripod of the drum washing machine according to claim 6, characterized in that, The upper welding component includes: An upper laser welding head; A first driving mechanism for driving the upper laser welding head to rotate around the axis of the tripod.

8. The manufacturing process of the tripod of the drum washing machine according to claim 7, characterized in that, The first driving mechanism includes: A mounting shaft rotatably installed on the frame, and the axis of the mounting shaft coincides with the axis of the tripod; A driving body fixed to the bottom end of the mounting shaft, and the upper laser welding head is installed on the lower surface of the driving body; A power component for driving the mounting shaft to rotate.

9. The manufacturing process of the tripod of the drum washing machine according to claim 8, characterized in that, The side welding component includes: A side laser welding head; A second driving mechanism for driving the side laser welding head to move to form an L-shaped weld seam.

10. The manufacturing process of the tripod of the drum washing machine according to claim 9, characterized in that, The second driving mechanism includes: A turntable rotatably installed on the lower surface of the frame; A mounting sleeve fixed to the end face of the turntable; A mounting rod passing through the mounting sleeve, and one end of the mounting rod close to the driving body is rotatably installed with a movable sleeve, the movable sleeve is sleeved on a vertical guide rod, a first limit block is provided at the bottom end of the guide rod, and the side laser welding head is installed on the movable sleeve; A compression spring sleeved on the mounting rod and located between the mounting sleeve and the movable sleeve, one end of the compression spring abuts against the mounting sleeve, and the other end abuts against a convex ring provided on the mounting rod; A movable block is sleeved on the guiding rod. The top end of the guiding rod is slidably connected to an adjusting plate above the machine frame. Vertical adjusting screws are respectively inserted through both ends of the adjusting plate. The adjusting screws are threadedly connected to the adjusting plate and rotatably connected to the machine frame. A guiding sleeve is installed on the machine frame. The length direction of the guiding sleeve is the same as the sliding direction of the guiding rod. The guiding rod and the guiding sleeve are arranged in a front-back dislocation manner. The guiding sleeve movably penetrates through the movable block and second limiting blocks are fixed at both ends thereof. The second limiting blocks are slidably connected to the machine frame. A threaded rod is threadedly inserted along the length direction of the guiding sleeve. One end of the threaded rod away from the movable block is rotatably connected to the machine frame and a bevel gear is fixed thereon. A bevel gear ring is rotatably installed on the upper surface of the machine frame. The bevel gear ring can be meshed with all the bevel gears. The bevel gear ring is fixed to the machine frame by fastening screws. Loosening the fastening screws can rotate the bevel gear ring.

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