Welding tool for self-cleaning cover plate of clothes dryer

Abstract

The utility model provides a welding tool for a self-cleaning cover plate of a clothes dryer, which can accurately position a welding edge during welding and effectively improve the yield. A correction structure comprising correction columns and correction holes is designed, the first correction column is arranged on the lower end face of a lifting plate, the second correction column is arranged on the upper end face of a base plate, and positioning between a water box heating block and a water box positioning structure is achieved through the first correction column and the first correction holes; positioning between the body heating block and the body positioning structure is realized through the second correction column and the second correction hole; meanwhile, the second correction column is arranged to be tubular, the diameter of the inner cavity is matched with the outer diameter of the second correction column, and positioning is achieved between the hot-melted water box and the cover plate body through cooperation between the first correction column and the second correction column.

Description

TECHNICAL FIELD

[0001] The utility model relates to a clothes dryer technical field, concretely is a kind of welding tool for the cover plate of clothes dryer self-cleaning. BACKGROUND

[0002] The structure of the cover plate for clothes dryer self-cleaning is shown in Figure 1 The cover plate includes a body N1, a water box N2 and a water box web N3. When assembling the cover plate, the water box web N3 is first installed on the water box N2 through a clamping structure, and then the water box N2 and the water box cover N3 are welded together on the water tank N11 of the body N1. The water inlet N21 on the water box N2 is connected to a water pipe, and after entering the position between the water box N2 and the water box groove N3, it is guided out from the water box water outlet N31 to the body water outlet N12 on the body N1. During welding, the welding edge N22 on the water box N2 and the water tank welding edge N13 in the water tank N11 need to be welded. However, because the welding edge N22 of the water box and the water tank N11 are not regular shapes, and the water tank 11 is a groove opened on the body N1, the top forging surface of the water tank welding edge N13 is lower than the top forging surface of the body N1. During welding, the welding edge N22 of the water box N2 needs to be inserted into the recessed water tank 11 and welded with the water tank welding surface N13 based on the hot melt welding method.

[0003] Patents with publication numbers CN215359934U and CN217071213U are hot melt welding tools currently used by the company, but based on the existing welding structure, the combination of the body N1 of the cover plate for clothes dryer self-cleaning and the water box N2 and the water box web N3 is welded, which is prone to inaccurate positioning. Once mispositioning occurs during welding, it will cause welding mispositioning, which in turn will cause the cover plate to leak during use. SUMMARY

[0004] To solve the problem of inaccurate positioning of the welding edge when welding the cover plate for clothes dryer self-cleaning and the water box in the prior art, the utility model provides a welding tool for the cover plate of clothes dryer self-cleaning, which can accurately position the welding edge during welding and effectively improve the yield.

[0005] The structure of the utility model is as follows: a welding tool for the cover plate of clothes dryer self-cleaning, which includes a body positioning structure, a water box positioning structure, a body heating structure and a water box heating structure, the water box positioning structure, the body heating structure and the water box heating structure are respectively connected to a driving device.

[0006] The water box heating structure is disposed between the main body positioning structure and the main body positioning structure; the main body heating structure is disposed between the water box heating structure and the main body positioning structure; the water box heating structure includes: a water box heating block and a first movable plate, the water box heating block being disposed on the upper end face of the first movable plate; the main body heating structure includes: a main body heating block and a second movable plate, the main body heating block being disposed on the lower end face of the second movable plate;

[0007] The body positioning structure includes: a base plate and a body positioning seat, wherein the base plate is horizontally arranged and the body positioning seat is disposed on the upper end surface of the base plate; the shape and size of the body positioning seat are adapted to the inner cavity of the side of the body to be welded away from the water box groove.

[0008] The water box positioning structure includes a lifting plate and a water box positioning seat. The lifting plate is horizontally positioned above the base plate, and the water box positioning seat is positioned on the lower end face of the lifting plate. The inner cavity shape and size of the water box positioning seat are adapted to the water box to be welded.

[0009] Its characteristic is that it further includes: a correction structure, the correction structure including: a correction post and a correction hole; the correction post including: a first correction post and a second correction post, the correction hole including: a first correction hole and a second correction hole, the inner diameter of the first correction hole being adapted to the outer diameter of the first correction post, and the inner diameter of the second correction hole being adapted to the outer cavity of the second correction post;

[0010] The first correction column is a cylindrical structure and is disposed on the lower end face of the lifting plate; the second correction column is a tubular structure, and the inner diameter of the second correction column is adapted to the outer diameter of the first correction column; the second correction column is disposed on the upper end face of the base plate; the first correction hole is disposed on the first moving plate, and the second correction hole is disposed on the second moving plate.

[0011] The bottom end face of the correction column is provided with a tapered surface; the inlet of each correction hole and the inlet of the inner cavity hole of the second correction column are provided with a tapered inlet slope with a wide inlet and a narrow outlet.

[0012] When the water box heating block is aligned with the welding edge on the water box, and the body heating block is aligned with the welding edge on the body, and the welding edge on the water box is aligned with the welding edge on the body, all the correction columns and correction holes are located on the same vertical line.

[0013] Its further features are:

[0014] It also includes: limiting posts, which are respectively disposed on the upper end surface of the first movable plate and the upper end surface of the substrate;

[0015] The main body positioning structure further includes: a clamping cylinder and a clamping head. The clamping head is located at the output end of the clamping cylinder and on the side of the main body positioning seat. Two clamping heads are provided, and the clamping directions of the two clamping heads are opposite to each other and located on the same straight line.

[0016] The body positioning structure further includes: a clamping seat, one end of which is close to the side wall of the body positioning seat; a sliding groove and an insertion groove are formed on the upper part of the clamping seat; the insertion groove is parallel to the side wall of the adjacent body positioning seat; the sliding groove is perpendicular to the insertion groove; and the sliding groove and the insertion groove form a T-shape; the clamping cylinder is located at the end of the clamping seat away from the body positioning seat.

[0017] The clamping head is convex in shape and is placed in the slide groove with the narrower side facing the main body positioning seat. The output end of the clamping cylinder is connected to the wider end of the clamping head.

[0018] It also includes: a guide cylinder, which is disposed below the second correction hole, and its inner cavity is interconnected with the second correction hole. The inner cavity of the guide cylinder is adapted to its second correction column, and the inlet of the guide cylinder is provided with a tapered guide slope with a wide inlet and a narrow outlet.

[0019] The water box positioning structure also includes: a suction cup, a water inlet positioning rod, and a positioning cylinder;

[0020] The suction cup is disposed in the inner cavity of the water box positioning seat; the outer diameter of the water inlet positioning rod is adapted to the inner diameter of the water inlet of the water box, and the water inlet positioning rod is disposed on the outer side of the water inlet of the water box positioning seat; the positioning cylinder is disposed on the lifting plate, and the output end is connected to the water inlet positioning rod, and the output end of the positioning cylinder is located on the extension line of the water inlet.

[0021] The lifting plate also includes: a second calibration hole;

[0022] Four second correction posts are provided on the substrate; two first correction posts and two second correction holes are provided on the lifting plate, with the two first correction posts and two second correction holes respectively corresponding to the positions of the two second correction posts.

[0023] This utility model provides a welding fixture for a self-cleaning cover plate of a clothes dryer. The fixture includes a correction structure with correction columns and correction holes. A first correction column is positioned on the lower end face of the lifting plate, and a second correction column is positioned on the upper end face of the base plate. The first correction column and the first correction hole achieve positioning between the water tank heating block and the water tank positioning structure, while the second correction column and the second correction hole achieve positioning between the main body heating block and the main body positioning structure. Simultaneously, the second correction column is tubular, with an inner diameter adapted to the outer diameter of the second correction column. The fit between the first and second correction columns achieves positioning between the heated water tank and the cover plate body. In this application, the bottom surfaces of the first and second correction pillars are set as constricting conical surfaces, and the inlet of the correction hole and the inlet of the inner cavity of the second correction pillar are set as conical guide slopes with a wide inlet and a narrow outlet. This ensures that when the first correction pillar and the first correction hole are aligned, when the second correction pillar and the second correction hole are aligned, and when the inner cavities of the first and second correction pillars are aligned, even if there is a slight offset, the correction pillar can be guided into the corresponding correction hole based on the cooperation of the constricting conical surface and the conical guide surface at the bottom of the correction pillar. This further ensures that the correction structure based on this application achieves precise positioning, which can accurately position the welding edge during welding and effectively improve the yield rate. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of the self-cleaning cover plate for a clothes dryer to be welded;

[0025] Figure 2 A three-dimensional schematic diagram of the overall structure of the welding fixture for the self-cleaning cover of a clothes dryer;

[0026] Figure 3 A schematic diagram of the body positioning structure;

[0027] Figure 4 A schematic diagram of the body heating structure;

[0028] Figure 5 A schematic diagram of the water box heating structure;

[0029] Figure 6 A schematic diagram of the water box positioning structure;

[0030] Figure 7 for Figure 1 A magnified structural diagram of point A in the middle;

[0031] Figure 8 for Figure 2 A magnified structural diagram of section B. Detailed Implementation

[0032] like Figures 2-8As shown, this utility model includes a welding fixture for a self-cleaning cover plate of a clothes dryer, comprising: a body positioning structure, a water tank positioning structure, a body heating structure, and a water tank heating structure. The water tank positioning structure, body heating structure, and water tank heating structure are each connected to a driving device. In actual implementation, the body heating structure and the water tank heating structure can be driven by a set of driving structures, or they can be driven separately by corresponding driving structures. The water tank positioning structure is connected to a lifting driving structure to achieve vertical lifting movement. The body heating structure and the water tank heating structure are connected to a driving structure capable of horizontal and vertical movement. The specific driving structure is based on existing technology, such as: a current bracket coordinate type robotic arm or spherical coordinate robotic arm, or a driving structure composed of a horizontal rotation structure and a lifting structure.

[0033] like Figure 2 As shown, the water box heating structure is located between the main body positioning structure and the water box positioning structure, and the main body heating structure is located between the water box heating structure and the main body positioning structure.

[0034] like Figure 3 and Figure 8 As shown, the body positioning structure includes: a base plate 1, a body positioning seat 5, a clamping cylinder 18, and a clamping head 19. The base plate 1 is horizontally positioned, and the body positioning seat 5 is positioned on the upper surface of the base plate 1; the shape and size of the body positioning seat 5 are adapted to the inner cavity of the side of the body to be welded away from the water tank groove. The body positioning structure also includes: a clamping head 19 is positioned at the output end of the clamping cylinder 18, and two clamping heads 19 are positioned on the side of the body positioning seat 5, with the clamping directions of the two clamping heads 19 being opposite each other and located on the same straight line.

[0035] During welding, the cover plate body N1 is fastened onto the body positioning seat 5 with the water tank N11 facing upward. Then, the clamping head 19 is driven by two clamping cylinders 18 to clamp the body N1 from both sides, ensuring that the body N1 will not slide on the body positioning seat 5 during the welding process.

[0036] The main body positioning structure also includes: a clamping seat 181, one end of which is tightly attached to the side wall of the main body positioning seat 5. A sliding groove 182 and an insertion groove 183 are formed above the clamping seat 181. The insertion groove 183 is parallel to the side wall of its adjacent main body positioning seat 5, and the sliding groove 182 is perpendicular to the insertion groove 183, forming a T-shape. A clamping cylinder 18 is located at the end of the clamping seat 181 furthest from the main body positioning seat 5. The width of the insertion groove 183 is adapted to the wall thickness of the main body N1, and the depth of the insertion groove 183 is adapted to the height of the side wall when the main body N1 is fastened to the main body positioning seat 5, ensuring that the main body N1 can be completely fastened to the main body positioning seat 5. A clamping head 19 is convex in shape and is placed in the sliding groove 182, with the narrower side facing the main body positioning seat 5. The output end of the clamping cylinder 18 is connected to the wider end of the clamping head 19. When the clamping cylinder 18 is in its default position, its output end retracts, causing the clamping head 19 to be positioned in the slide groove 182 away from the main body positioning seat 5. When the main body N1 is placed on the main body positioning seat 5, the side walls on both sides of the main body N1 are inserted into the insertion groove 183. The clamping cylinder 18 is activated, and its output end pushes the clamping head 19 to slide along the slide groove 182 until the side walls on both sides of the main body N1 are clamped against the side walls of the positioning seat 5. The combination of the insertion groove 183 and the U-shaped clamping head ensures that the main body N1 can be more securely placed on the main body positioning seat 5.

[0037] The main body heating structure includes: a main body heating block 7 and a second movable plate 4, wherein the main body heating block 7 is disposed on the lower end surface of the second movable plate 4. Figure 4 As shown, the main heating block 7 is an outwardly protruding contoured block, and its shape is similar to... Figure 1 The inner cavity shape of the water tank N11 is adapted to the body. When the body heating block 7 heats the body N1 placed on the body positioning structure, the body heating block N7 is inserted into the water tank N11 to ensure that only the water tank welding edge N13 set in the water tank N11 is heat-melted.

[0038] like Figure 5 As shown, the water box heating structure includes a water box heating block 8 and a first movable plate 3. The water box heating block 8 is disposed on the upper end face of the first movable plate 3. In a specific implementation, the water box heating block 8 includes a heating frame 82, which forms a closed strip-shaped heating frame. The center of the heating frame 82 is a water box contour groove 81. The shape and size of the heating frame 82 are adapted to the welding edge N22 on the water box N2. When the water box N2 is placed in the water box positioning structure from below and heat-melted by the water box heating structure, the water box web plate N3 installed at the center of the water box N2 will not be heat-melted because of the presence of the water box contour groove 81, while the heating frame 82 will only heat-melt the welding edge N22 on the water box N2.

[0039] like Figure 6As shown, the water box positioning structure includes: a lifting plate 2 and a water box positioning seat 6. The lifting plate 2 is horizontally positioned above the base plate 1, and the water box positioning seat 6 is positioned on the lower end face of the lifting plate 2. The inner cavity shape and size of the water box positioning seat 6 are adapted to the water box to be welded. The water box positioning structure also includes: a suction cup 15, an inlet positioning rod 16, and a positioning cylinder 17. The suction cup 15 is positioned in the inner cavity of the water box positioning seat 6. The outer diameter of the inlet positioning rod 16 is adapted to the inner diameter of the water inlet of the water box, and the inlet positioning rod 16 is positioned on the outer side of the water inlet of the water box positioning seat 6. The positioning cylinder 17 is positioned on the lifting plate 2, and its output end is connected to the inlet positioning rod 16. The output end of the positioning cylinder 17 is located on the extension line of the inlet.

[0040] like Figure 1 As shown, the water box web plate N3 is installed in the inner cavity of the welded edge N22 on the water box N2. When the assembly of water box N2 and water box web plate N3 is installed on the water box positioning structure, it is placed on the water box positioning seat 6 with the side where the welded edge N22 is facing down. The water inlet N21 of water box N1 is engaged with the water inlet engagement groove 61 on the water box positioning seat 6. The suction cup 15 is activated to hold the water box N1. Then, the positioning cylinder 17 is activated to push the water inlet positioning rod 16 into the water inlet N21. The assembly of water box N2 and water box web plate N3 is fixed on the water box positioning structure by the cooperation of the suction cup 15 and the water inlet positioning rod 16.

[0041] To achieve calibration between welded components, a calibration structure is designed in this application. The calibration structure includes: a calibration post and a calibration hole; the calibration post includes: a first calibration post 10 and a second calibration post 9, and the calibration hole includes: a first calibration hole 12 and a second calibration hole 13. The inner diameter of the first calibration hole 12 is adapted to the outer diameter of the first calibration post 10, and the inner diameter of the second calibration hole 13 is adapted to the outer diameter of the second calibration post 9.

[0042] like Figure 2 As shown, the first correction post 10 is a cylindrical structure and is located on the lower end face of the lifting plate 2; the second correction post 9 is a tubular structure, and the inner diameter of the second correction post 9 is adapted to the outer diameter of the first correction post 10; the second correction post 9 is located on the upper end face of the base plate 1; the first correction hole 12 is located on the first moving plate 3, and the second correction hole 13 is located on both the second moving plate 4 and the lifting plate 2. When the water tank heating block 8 is aligned with the welding edge N22 on the water tank, the body heating block 7 is aligned with the welding edge N13 on the body, and the welding edge N22 on the water tank is aligned with the welding edge N1 on the body, all the correction posts and correction holes are located on the same vertical line.

[0043] During the heating process, the main heating structure is driven to move above the main positioning structure. As the main heating structure descends and approaches the main positioning structure, the vertical second correction post 9 set on the upper end surface of the substrate 1 is gradually inserted into the second correction hole 13 on the second moving plate 4 to achieve position calibration of the two structures.

[0044] When the water box heating structure is driven to move below the water box positioning structure, as the heating block and the water box approach each other, the first vertically downward correction column 10 set on the lower end face of the lifting plate 2 is gradually inserted into the first correction hole 12 in the first moving plate 3, thereby calibrating the positions of the two structures.

[0045] Refer to the attached diagram in the instruction manual. Figure 7 and Figure 8 The bottom end face of the first correction column 10 is provided with a tapered surface 101 that is wider at the top and narrower at the bottom; the entrance of the first correction hole 12 is provided with a tapered guide slope 1201 that is wider at the top and narrower at the bottom; the inner cavity of the second correction column 9 is a positioning hole 901, the diameter of which is adapted to the outer diameter of the first correction column 10. At the same time, the inner side of the entrance of the second correction column 9 is provided with a tapered guide slope 902 that is wider at the top and narrower at the bottom, while the outer side of the entrance is provided with a tapered guide slope 903 that is narrower at the top and wider at the bottom.

[0046] The inlet of the second correction hole 13 is provided with a tapered guide slope, just like the inlet of the first correction hole 12. The tapered guide slope of the inlet of the first correction hole 12 cooperates with the contracting tapered surface 101 below the first correction column 10. The guide slope of the inlet of the second correction hole 13, which is wide at the inlet and narrow at the outlet, cooperates with the tapered guide slope 903, which is narrow at the top and wide at the bottom, provided on the outside of the inlet of the second correction column 9. This ensures that even if there is a misalignment between the body heating structure and the body positioning structure, or between the water box heating structure and the water box positioning structure, the position can be aligned by the cooperation of the guide slope and the tapered surface during the hot melting process.

[0047] Four second correction pillars 9 are provided on the substrate 1, such as... Figure 3 The four second correction columns 9 shown are located at the four vertices of the rectangle; the number of first correction columns set on the lifting plate 2 is 2, and the number of second correction holes set on the lifting plate 2 is 2. The two first correction columns 10 and the two second correction holes on the lifting plate 2 are respectively set to correspond to the positions of the two second correction columns 9.

[0048] A tapered guide slope 902, wider at the top and narrower at the bottom, is provided inside the entrance of the second correction column 9. This is so that during the welding process after the hot melting process, when the water box heating structure and the main body heating structure are removed, as the water box positioning structure continues to descend and gradually approaches the main body positioning structure, the two second correction columns 9 are gradually inserted into the second correction holes provided on the lifting plate 2. The two first correction columns 10 on the lifting plate 2 are gradually inserted into the inner cavities of the two second correction columns 9 on the substrate 1. At the same time, at the four vertices of the rectangle, the positions of the lifting plate 2 and the substrate 1 are simultaneously calibrated by the first correction columns, the second correction columns, and the correction holes. This reduces the probability of inaccurate calibration due to the processing error of the correction columns and effectively improves the accuracy of the position alignment of the two structures during the welding process.

[0049] To improve the accuracy of the calibration, this application also includes a guide cylinder 14, which is positioned below the second calibration hole 13. The guide cylinder 14 has an inner cavity that communicates with the second calibration hole 13. An inlet hole 142 is provided within the inner cavity of the guide cylinder 14, and the inner diameter of the inlet hole 142 is adapted to the second calibration column 9. The inlet of the guide cylinder 14 is provided with a tapered inlet slope 141 that is wider at the inlet and narrower at the outlet. Figure 2 , Figure 4 and Figure 6 As shown, the guide cylinder 14 is positioned below the second correction hole 13 of the lifting plate 2 and the second moving plate 4. The inner cavity of the guide cylinder 14 communicates with the second correction hole 13. Because the guide cylinder 14 has a certain length, it can contact the second correction column 9 even when the distance between the lifting plate 2 and the base plate 1, and between the second moving plate 4 and the first moving plate 3, is relatively large. Even if the positions of the lifting plate 2 and the base plate 1, and between the second moving plate 4 and the base plate 1, are significantly different, the position between the two structures can be corrected. The specific length of the guide cylinder 14 can be adjusted according to the processing accuracy of the actual equipment.

[0050] To ensure that the distance between the heating block and the welding edge being melted is not excessive during the hot-melt process, this application also provides limiting posts, which are respectively set on the upper end surface of the first moving plate 3 and the upper end surface of the substrate 1. Specifically, it includes a first limiting post 1101 set on the substrate and a second limiting post 1102 set on the first moving plate 3, to ensure that the distance between the lifting plate 2 and the substrate 1, between the second moving plate 4 and the substrate 1, and between the lifting plate 2 and the first moving plate 3 does not exceed the preset minimum distance, thereby ensuring that the hot-melt process and the welding process can be completed accurately.

[0051] Using the technical solution of this utility model, the water tank web plate N3 is installed in the inner cavity of the welding edge N22 on the water tank N2. The assembly of the water tank N2 and the water tank web plate N3 is installed on the water tank positioning structure. The main body N1 is installed in the main body positioning structure. The main body heating structure and the water tank heating structure are driven between the main body positioning structure and the water tank positioning structure by the driving structure. The welding edge N22 on the water tank N2 is heat-melted by the water tank heating structure, and the welding edge N13 on the main body N1 is heat-melted by the main body heating structure. After the heat-melting process is completed, the main body heating structure and the water tank heating structure are driven to move away, and the water tank positioning structure is driven to descend until the welding edge N22 on the water tank N2 presses against the welding edge N13 on the main body N1. After a period of cooling, the welding process is completed. In the heat-melting process and the welding process, the position calibration between the structures is achieved based on the correction structure, so that the welding edge is accurately positioned during welding, which effectively improves the yield.

Claims

1. A welding fixture for a self-cleaning cover plate of a clothes dryer, comprising: The system includes a main body positioning structure, a water box positioning structure, a main body heating structure, and a water box heating structure, wherein the water box positioning structure, the main body heating structure, and the water box heating structure are respectively connected to a driving device; The water box heating structure is disposed between the main body positioning structure and the water box positioning structure, and the main body heating structure is disposed between the water box heating structure and the main body positioning structure; The water tank heating structure includes: a water tank heating block and a first movable plate, wherein the water tank heating block is disposed on the upper end face of the first movable plate; the body heating structure includes: a body heating block and a second movable plate, wherein the body heating block is disposed on the lower end face of the second movable plate; The body positioning structure includes: a base plate and a body positioning seat, wherein the base plate is horizontally arranged and the body positioning seat is disposed on the upper end surface of the base plate; the shape and size of the body positioning seat are adapted to the inner cavity of the side of the body to be welded away from the water box groove. The water box positioning structure includes a lifting plate and a water box positioning seat. The lifting plate is horizontally positioned above the base plate, and the water box positioning seat is positioned on the lower end face of the lifting plate. The inner cavity shape and size of the water box positioning seat are adapted to the water box to be welded. Its characteristic is that it further includes: a correction structure, the correction structure including: a correction post and a correction hole; the correction post including: a first correction post and a second correction post, the correction hole including: a first correction hole and a second correction hole, the inner diameter of the first correction hole being adapted to the outer diameter of the first correction post, and the inner diameter of the second correction hole being adapted to the outer cavity of the second correction post; The first correction post is a cylindrical structure and is disposed on the lower end face of the lifting plate; the second correction post is a tubular structure, and the inner diameter of the second correction post is adapted to the outer diameter of the first correction post; the second correction post is disposed on the upper end face of the substrate; the first correction hole is disposed on the first moving plate, and the second correction hole is disposed on the second moving plate. The bottom end face of the correction column is provided with a tapered surface; the inlet of each correction hole and the inlet of the inner cavity hole of the second correction column are provided with a tapered inlet slope with a wide inlet and a narrow outlet. When the water box heating block is aligned with the welding edge on the water box, and the body heating block is aligned with the welding edge on the body, and the welding edge on the water box is aligned with the welding edge on the body, all the correction columns and correction holes are located on the same vertical line.

2. The welding fixture for a self-cleaning cover plate for a clothes dryer according to claim 1, characterized in that: It also includes: limiting posts, which are respectively disposed on the upper end surface of the first movable plate and the upper end surface of the substrate.

3. The welding fixture for a self-cleaning cover plate for a clothes dryer according to claim 1, characterized in that: The main body positioning structure further includes: a clamping cylinder and a clamping head. The clamping head is located at the output end of the clamping cylinder and on the side of the main body positioning seat. Two clamping heads are provided, and the clamping directions of the two clamping heads are opposite to each other and located on the same straight line.

4. The welding fixture for a self-cleaning cover plate for a clothes dryer according to claim 3, characterized in that: The body positioning structure further includes: a clamping seat, one end of which is close to the side wall of the body positioning seat; a sliding groove and an insertion groove are formed on the upper part of the clamping seat; the insertion groove is parallel to the side wall of the adjacent body positioning seat; the sliding groove is perpendicular to the insertion groove; and the sliding groove and the insertion groove form a T-shape; the clamping cylinder is located at the end of the clamping seat away from the body positioning seat. The clamping head is convex in shape and is placed in the slide groove with its narrower side facing the main body positioning seat. The output end of the clamping cylinder is connected to the wider end of the clamping head.

5. The welding fixture for a self-cleaning cover plate for a clothes dryer according to claim 1, characterized in that: It also includes: a guide cylinder, which is disposed below the second correction hole, and its inner cavity is in communication with the second correction hole. The inner cavity of the guide cylinder is adapted to the diameter of its second correction column, and the inlet of the guide cylinder is provided with a tapered guide slope with a wide inlet and a narrow outlet.

6. The welding fixture for a self-cleaning cover plate for a clothes dryer according to claim 1, characterized in that: The water box positioning structure also includes: a suction cup, a water inlet positioning rod, and a positioning cylinder; The suction cup is disposed in the inner cavity of the water box positioning seat; the outer diameter of the water inlet positioning rod is adapted to the inner diameter of the water inlet of the water box, and the water inlet positioning rod is disposed on the outer side of the water inlet of the water box positioning seat; the positioning cylinder is disposed on the lifting plate, and the output end is connected to the water inlet positioning rod, and the output end of the positioning cylinder is located on the extension line of the water inlet.

7. The welding fixture for a self-cleaning cover plate for a clothes dryer according to claim 1, characterized in that: The lifting plate also includes a second calibration hole.

8. The welding fixture for a self-cleaning cover plate for a clothes dryer according to claim 7, characterized in that: Four second correction posts are provided on the substrate; two first correction posts and two second correction holes are provided on the lifting plate, with the two first correction posts and two second correction holes respectively corresponding to the positions of the two second correction posts.

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