A device for internal heat welding of a hemispherical shell

Abstract

The utility model belongs to the technical field of hot welding device, specifically disclose a kind of inside hot welding device of hemispherical shell, including work panel, fixed with locating die on work panel, multiple hot welding holes are arranged on the hemispherical locating wall of locating die, locating die is accommodated with the hot riveting piece with vertical movement function, the top of hot riveting piece is respectively equipped with hot riveting head corresponding the position of each hot welding hole, locating die is equipped with the die with vertical movement function directly above, and the pressure column is elastically inserted in the die pressure surface that is hemispherical concave arrangement. The utility model is fixed with locating die on work panel, its hemispherical locating wall is equipped with hot welding hole, for the riveting piece welding leg guidance, locating die has the hot riveting piece that can be vertically moved, top hot riveting head accurately acts on welding leg, directly above has the die that can be vertically moved, and die pressure surface is consistent with shell, cooperate elastic pressure column, realize the high-precision positioning of the riveting piece and shell, uniform stable hot welding and reliable crimping, improve production efficiency, ensure product quality.

Description

Technical Field

[0001] This utility model belongs to the technical field of hot welding devices, and particularly relates to a hot welding device for the interior of a hemispherical shell. Background Technology

[0002] In the audio manufacturing industry, the assembly quality of internal components has a decisive impact on the final performance of the product. In particular, the precise thermal welding of the lens onto the hemispherical housing is a crucial step in ensuring the stability of the internal structure and the proper functioning of optical components. However, existing thermal welding equipment has significant shortcomings in its positioning and pressing design.

[0003] In terms of positioning, most of these devices use simple mechanical clamps or positioning blocks to fix the hemispherical housing and lens. However, the fit between these positioning components and the shape of the hemispherical housing and lens is extremely poor. During the positioning process, the position is mainly determined by the operator's experience and visual inspection, which not only results in low production efficiency but also makes it difficult to ensure that the lens welding feet are precisely aligned with the welding position of the housing.

[0004] In terms of crimping, the crimping surface of existing devices is usually designed as a flat plane or a simple regular curved surface, which is seriously mismatched with the curved shape of the hemispherical shell. During the crimping operation, the pressure distribution is extremely uneven. Some areas bear excessive pressure, which can easily scratch the lens surface, deform the lens, or even damage the local structure of the shell; while other areas have too little pressure, resulting in the lens and shell not being able to fit tightly together, which seriously affects the welding quality.

[0005] Therefore, the inventors dedicated themselves to designing a thermal welding device to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a hot welding device for the inside of a hemispherical shell, which can achieve high-precision positioning of the part to be riveted to the shell, uniform and stable hot welding and reliable pressing, thereby improving production efficiency and ensuring product quality.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A hemispherical shell internal hot welding device includes a working panel, on which a positioning mold is fixed. The hemispherical positioning wall of the positioning mold is provided with a plurality of hot welding holes for the welding feet of the workpiece to be riveted to be inserted. The positioning mold contains a hot riveting part with vertical movement function. The top of the hot riveting part is provided with a hot riveting head for melting the corresponding welding foot at the position of each hot welding hole. A pressure mold with vertical movement function is provided directly above the positioning mold. The pressing surface of the pressure mold is hemispherically concave and elastically inserted with a pressure post for pressing the workpiece to be riveted.

[0009] As an improvement of the internal hot welding device of the hemispherical shell of this utility model, an elastic pad is attached to the bottom of the pressure column, and a cylindrical pressure platform is provided at the lower pressing end of the pressure mold. The bottom end face of the pressure platform is hemispherically concave to form the pressing surface.

[0010] As an improvement of the internal hot welding device of the hemispherical shell of this utility model, the positioning mold includes a heat sink and a positioning seat. The positioning seat and the heat sink are stacked and fixed on the working panel from top to bottom, and the positioning end of the positioning seat is hemispherical.

[0011] As an improvement of the internal hot welding device of the hemispherical shell of this utility model, an inclined surface is provided on the heat dissipation block, and the positioning seat is superimposed and fixed on the inclined surface.

[0012] As an improvement of the internal hot welding device of the hemispherical shell of this utility model, the heat sink is fixedly connected to the positioning seat by a plurality of screws, and the heat sink is positioned and connected to the positioning seat by a plurality of positioning pins, and all the screws and all the positioning pins are located on the inclined surface.

[0013] As an improvement of the internal hot welding device of the hemispherical shell of this utility model, the heat dissipation block is provided with multiple heat dissipation channels, and the water inlet at both ends of each heat dissipation channel is located on two corresponding surfaces of the heat dissipation block.

[0014] As an improvement of the internal hot welding device of the hemispherical shell of this utility model, the heat sink is annular, the bottom of the positioning seat is hollowed out and superimposed and fixed on the heat sink to form a hot riveting hole, the hot riveting part is located in the hot riveting hole, and the front of the positioning seat is provided with a notch, which communicates with the hot riveting hole.

[0015] As an improvement of the internal hot welding device of the hemispherical shell of this utility model, a plurality of positioning elements for positioning the mounting holes of the shell are inserted on the side wall of the positioning end of the positioning seat, and a plurality of positioning pins for positioning the top of the shell are inserted on the top wall of the positioning seat.

[0016] As an improvement of the internal hot welding device of the hemispherical shell of this utility model, the top of the hot riveting part is provided with a boss, all the hot riveting heads are vertically arranged on the boss, the top surface of the hot riveting head is arc-shaped and concave to form a hot riveting surface, the inner wall of the positioning mold is provided with a groove for cooperating with the boss, and all the hot welding holes are located in the groove.

[0017] As an improvement of the internal hot welding device of the hemispherical shell of this utility model, the working panel is fixed on the top of a box, the box is provided with an electric push rod, the output end of the electric push rod is connected to the hot riveting part through a connector, the box is provided with a U-shaped protective cover, the opening of the protective cover is provided with a transparent plate, and the transparent plate and the protective cover form a ring structure around the positioning mold and the pressing mold.

[0018] Compared with existing technologies, the hemispherical shell internal hot welding device of this utility model, through the fixed positioning mold on the working panel, provides precise insertion guidance for the welding feet of the parts to be riveted (such as lenses) by multiple hot welding holes opened on the hemispherical positioning wall, ensuring high positioning accuracy. The vertically movable hot riveting part inside the positioning mold, with its hot riveting head set at the position of the hot welding hole on the top, can accurately act on the welding feet during hot welding, realizing uniform heat transfer and stable melting, ensuring welding quality. The pressure mold with vertical movement function directly above the positioning mold, whose hemispherical concave pressing surface perfectly fits the outer wall of the hemispherical shell, and together with the elastically inserted pressure column, can apply pressure evenly during the pressing process while avoiding damage to the parts to be riveted. This series of structures work together to achieve high-precision positioning of the parts to be riveted and the shell, uniform and stable hot welding, and reliable pressing, significantly improving production efficiency and effectively guaranteeing product quality. Attached image description:

[0019] Figure 1 This is a perspective view of the internal thermal welding device of the hemispherical shell of this utility model;

[0020] Figure 2 This is a cross-sectional view of the internal hot welding device of the hemispherical shell of this utility model;

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a three-dimensional enlarged view of the positioning mold, pressing mold, and various driving mechanisms of this utility model;

[0023] Figure 5 This is a three-dimensional enlarged view of the positioning mold and the pressing mold of this utility model;

[0024] Figure 6 This is an enlarged cross-sectional view of the positioning mold and the pressing mold of this utility model;

[0025] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0026] Figure 8 This is a three-dimensional enlarged view of the positioning mold, shell, and pressure column in this utility model;

[0027] Figure 9 This is a three-dimensional enlarged view of the positioning mold in this utility model;

[0028] Figure 10 This is a perspective view of the positioning module from another angle in this utility model;

[0029] Figure 11 This is a three-dimensional exploded and enlarged view of the positioning mold in this utility model;

[0030] Figure 12 This is a three-dimensional enlarged view of the hot riveting part and the connecting part in this utility model;

[0031] Figure 13 yes Figure 12 Enlarged view of point C in the middle;

[0032] Figure 14 This is a three-dimensional enlarged view of the molding die in this utility model;

[0033] Figure 15 This is an exploded and enlarged three-dimensional view of the compression mold in this utility model;

[0034] Figure 16 This is a three-dimensional enlarged view of the shell and the part to be riveted in this utility model.

[0035] Figure 17 This is an exploded and enlarged perspective view of the shell and the part to be riveted in this utility model.

[0036] Figure 18 This is a three-dimensional enlarged view of the part to be riveted in this utility model.

[0037] Illustration:

[0038] 1. Working panel; 11. Housing; 12. Transparent panel; 121. Protective cover; 13. Support plate; 131. Limiting plate; 2. Hot riveting parts; 21. Boss; 22. Hot riveting head; 221. Hot riveting surface; 23. Heating rod; 3. Positioning mold; 31. Positioning seat; 311. Positioning part; 312. Positioning post; 313. Positioning pin; 314. Hot welding hole; 315. Groove; 32. Heat sink; 321. Angled surface; 322. Water connector; 33. Hot riveting hole; 331. Notch; 4. Pressing mold; 41. Fixing block; 411. Fixing plate; 42. Adjusting block; 421. Insertion hole; 43. Pressing block; 431. Pressing surface; 432. Pressing table; 44. Pressing column; 441. Spring; 5. Downward pressing cylinder; 6. Electric push rod; 61. Connecting part; 7. Housing; 71. Mounting hole; 8. Part to be riveted; 81. Weld foot; 82. Protrusion. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below with reference to the accompanying drawings. The drawings are for reference and illustration only and do not constitute a limitation on the scope of patent protection of this utility model.

[0040] Reference Figures 1 to 18 A hemispherical shell internal hot welding device includes a working panel 1, a positioning mold 3, a pressing mold 4, and a hot riveting component 2. The positioning mold 3 is fixed on the working panel 1. The hemispherical positioning wall of the positioning mold 3 is provided with a plurality of hot welding holes 314 for the welding feet 81 of the component to be riveted 8 to be inserted into. The hot riveting component 2 is housed in the positioning mold 3 and has a vertical movement function. The top of the hot riveting component 2 is provided with a hot riveting head 22 for melting the corresponding welding feet 81 at the position of each hot welding hole 314. The pressing mold 4 is located directly above the positioning mold 3 and has a vertical movement function. The pressing surface 431 of the pressing mold 4 is hemispherically concave and elastically inserted with a pressing column 44 for pressing the component to be riveted 8.

[0041] Reference Figure 1 and Figure 2 The working panel 1 is fixed directly above a box 11. A U-shaped protective cover 121 is provided on the box 11. A transparent plate 12 is provided at the opening on the front of the protective cover 121. The transparent plate 12 is fixedly connected to the protective cover 121 by an outer frame. The transparent plate 12 and the protective cover 121 form a ring structure around the positioning mold 3 and the pressing mold 4. In this embodiment, the transparent plate 12 is located on the front of the entire device for easy removal. The protective cover 121 covers the left and right sides and the back of the device. The working panel 1 is fixed directly above the box 11 by multiple support columns. A support plate 13 is also connected between the working panel 1 and the box 11 by a support column. A limit plate 131 is fixed on the support plate 13. A fixing plate 411 is connected directly above the working panel 1 by a fixing column.

[0042] Reference Figures 4 to 11In this utility model, the number of positioning molds 3 is preferably two, which are fixed to the working panel 1 at intervals. Each positioning mold 3 includes a heat dissipation block 32 and a positioning seat 31. The positioning seat 31 and the heat dissipation block 32 are stacked and fixed to the working panel 1 from top to bottom. Specifically, the heat dissipation block 32 is annular, and the top surface of the heat dissipation block 32 is inclined with a slope 321, so that the height of the heat dissipation block 32 gradually increases from front to back. The heat dissipation block 32 is provided with two heat dissipation channels. The water inlet 322 at both ends of each heat dissipation channel is located on the front and rear corresponding surfaces of the heat dissipation block 32. After the two heat dissipation channels are connected to the water source, they can dissipate heat to the part of the hot riveting part 2 located in the heat dissipation block 32. The positioning end of the positioning seat 31 (i.e., the end used to position the housing 7, which is the upper end) is hemispherical, and the bottom of the positioning seat 31 is hollowed out and stacked. A hot riveting hole 33 is formed on the inclined surface 321 of the heat sink 32. A notch 331 is provided on the front side of the positioning seat 31, which communicates with the hot riveting hole 33. The heat sink 32 is fixedly connected to the positioning seat 31 by multiple screws. The heat sink 32 is positioned and connected to the positioning seat 31 by multiple positioning pins 313. All screws and all positioning pins 313 are located on the inclined surface 321. In order to accurately position the housing 7, multiple positioning elements 311 for positioning the mounting holes 71 of the housing 7 are inserted on the positioning end side wall of the positioning seat 31. Each positioning element 311 is elongated and inclined. Multiple positioning pins 312 for positioning the top of the housing 7 are inserted on the top wall of the positioning seat 31. A groove 315 is provided on the inner wall of the positioning seat 31, and all hot welding holes 314 are located in the groove 315.

[0043] Reference Figure 2 , Figure 3 , Figure 6 and Figure 12 Each of the positioning molds 3 has a hot riveting part 2 in its hot riveting hole 33. Each hot riveting part 2 has a boss 21 on its top. The boss 21 is used to cooperate with the groove 315 on the inner wall of the corresponding positioning mold 3. All the hot riveting heads 22 on the same hot riveting part 2 are vertically and spaced on its boss 21. The hot riveting heads 22 are elongated. The top surface of each hot riveting head 22 is arc-shaped and concave to form a hot riveting surface 221. In order to drive the two hot riveting parts 2 to move up and down in the corresponding hot riveting hole 33, two electric push rods 6 are fixedly installed in the housing 11. The output ends of the two electric push rods 6 are respectively connected to the two hot riveting parts 2 through the connecting parts 61. The lower end of each connecting part 61 is located in the limiting groove of the limiting plate 131. The upper end of the connecting part 61 passes through the working panel 1 and extends into the hot riveting hole 33. The output shaft of the electric push rod 6 passes through the top plate and the support plate 13 of the housing 11 in sequence and is connected to the connecting part 61.

[0044] Reference Figure 6 , Figure 14 and Figure 15In this utility model, the number of pressing molds 4 is preferably two and they are respectively set at the bottom of two fixed plates 411. Each pressing mold 4 includes a fixed block 41, an adjusting block 42 and a pressing block 43. The pressing block 43, the adjusting block 42 and the fixed block 41 are stacked and fixedly arranged from bottom to top. The pressing block 43 is made of soft material. The pressing end of the pressing block 43 is provided with a cylindrical pressing platform 432. The bottom end face of the pressing platform 432 is hemispherical and concave to form the pressing surface 431. In order to drive the two pressing molds 4 to move up and down, a pressing cylinder 5 is also provided directly above the two pressing molds 4. The output ends of the two pressing cylinders 5 pass through the two fixed plates 411 and are then fixedly connected to the two fixed blocks 41.

[0045] Reference Figure 15 Each die 4 has a pressing surface 431 that is elastically inserted with a pressing post 44 for pressing the part to be riveted 8. The lower end of the pressing post 44 passes through the insertion hole 421 on the adjusting block 42 and the insertion hole 421 on the pressing block 43 from top to bottom. The cross-sectional shape of the lower end of the pressing post 44 matches the surface shape of the part to be riveted 8. The upper end of the pressing post 44 is elastically connected to the fixing block 41 by a spring 441. In order to prevent the pressing post 44 from damaging the part to be riveted 8, an elastic pad is attached to the bottom of the pressing post 44.

[0046] Refer to Figures 1 to 18 The working principle of the internal hot welding device of the hemispherical shell of this utility model is as follows:

[0047] Place two housings 7 (e.g., speaker housings) onto two positioning molds 3, aligning the mounting holes 71 of the housings 7 with the notches 331 of the positioning molds 3. Position the four positioning pieces 311 within the mounting holes 71 of the housings 7, securing the flanges at the edges of the mounting holes 71 (e.g., ...). Figure 5 As shown), the side of the housing 7 is limited, and at the same time, multiple positioning pins 312 on the top of the positioning mold 3 pass through the top hole of the top of the housing 7, thus limiting the top of the housing 7.

[0048] Two riveted parts 8 (e.g., plastic lenses) are respectively inserted into the mounting slots on the top of the two housings 7, so that the two welding feet 81 of the riveted parts 8 pass through the corresponding housings 7 and then extend into the two hot welding holes 314 of the positioning mold 3. The protrusion 82 of the riveted parts 8 is located in the center hole of the mounting slot of the housing 7.

[0049] Two downward cylinders 5 drive their respective pressing molds 4 to move downward until the pressing surface 431 of the pressing mold 4 matches the top of the housing 7. The pressing column 44 moves upward and elastically presses the outer surface of the part to be riveted 8. At this time, the spring 441 is in a compressed state.

[0050] Two electric push rods 6 push two hot riveting parts 2 upward in the hot riveting holes 33 of each positioning mold 3 through the connecting parts 61, so that the boss 21 of the hot riveting part 2 enters the groove 315 of the inner wall of the positioning mold 3. The hot riveting part 2 moves further upward, and the two hot riveting heads 22 on the boss 21 enter the two hot welding holes 314 of the positioning mold 3 respectively. The hot riveting surfaces 221 of the two hot riveting heads 22 contact the two welding feet 81 of the part to be riveted 8. The hot riveting part 2 heats up under the heating action of the heating rod 23. The hot riveting heads 22 melt the welding feet 81. The hot riveting part 2 rises and melts the welding feet 81 until the part to be riveted 8 is welded to the shell 7. At this time, the welding feet 81 are completely melted.

[0051] The hot riveting part 2 and the pressure mold 4 are reset in sequence and moved away from the welded product, so that the welded product can be taken out from the positioning mold 3.

[0052] This utility model's hemispherical shell internal hot welding device, through a fixed positioning mold 3 on the working panel 1, provides precise insertion guidance for the welding feet 81 of the riveted part 8 (such as a lens) by multiple hot welding holes 314 opened on its hemispherical positioning wall, ensuring high positioning accuracy. The vertically movable hot riveting part 2 inside the positioning mold 3, with its top corresponding to the hot welding holes 314, can precisely act on the welding feet 81 during hot welding, achieving uniform heat transfer and stable melting, ensuring welding quality. The pressure mold 4 above the positioning mold 3, with its vertically movable pressing surface 431, perfectly fits the outer wall of the hemispherical shell 7. Combined with the elastically inserted pressure column 44, it can apply pressure evenly during the pressing process while avoiding damage to the riveted part 8. This series of structures works synergistically to achieve high-precision positioning of the riveted part 8 and the shell 7, uniform and stable hot welding, and reliable pressing, significantly improving production efficiency and effectively guaranteeing product quality.

[0053] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of protection of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the patent application of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A hemispherical shell internal hot welding device, comprising a working panel, characterized in that, A positioning mold is fixed on the working panel. The hemispherical positioning wall of the positioning mold is provided with multiple hot welding holes for the welding feet of the workpiece to be riveted to be inserted. The positioning mold contains a hot riveting part with vertical movement function. The top of the hot riveting part is provided with a hot riveting head for melting the corresponding welding foot at the position of each hot welding hole. A pressure mold with vertical movement function is provided directly above the positioning mold. The pressing surface of the pressure mold is hemispherically concave and elastically inserted with a pressure column for pressing the workpiece to be riveted.

2. The internal hot welding device for a hemispherical shell according to claim 1, characterized in that, An elastic pad is attached to the bottom of the pressure column, and a cylindrical pressure platform is provided at the lower pressing end of the pressure mold. The bottom end face of the pressure platform is hemispherical and concave to form the pressing surface.

3. The internal hot welding device for a hemispherical shell according to claim 1, characterized in that, The positioning module includes a heat sink and a positioning base. The positioning base and the heat sink are stacked and fixed on the working panel from top to bottom. The positioning end of the positioning base is hemispherical.

4. The internal hot welding device for a hemispherical shell according to claim 3, characterized in that, The heat sink has an inclined surface, and the positioning seat is stacked and fixed on the inclined surface.

5. The internal hot welding device for a hemispherical shell according to claim 4, characterized in that, The heat sink is fixedly connected to the positioning seat by multiple screws, and the heat sink is positioned and connected to the positioning seat by multiple positioning pins. All the screws and all the positioning pins are located on the inclined surface.

6. The internal hot welding device for a hemispherical shell according to claim 3, characterized in that, The heat sink has multiple heat dissipation channels, and the water inlets at both ends of each heat dissipation channel are located on two corresponding surfaces of the heat sink.

7. The internal hot welding device for a hemispherical shell according to claim 3, characterized in that, The heat sink is ring-shaped. The bottom of the positioning seat is hollowed out and stacked and fixed on the heat sink to form a hot riveting hole. The hot riveting part is located in the hot riveting hole. The front of the positioning seat is provided with a notch, which communicates with the hot riveting hole.

8. The internal hot welding device for a hemispherical shell according to claim 3, characterized in that, The positioning end sidewall of the positioning seat is provided with a plurality of positioning elements for positioning the mounting holes of the housing, and the top wall of the positioning seat is provided with a plurality of positioning pins for positioning the top of the housing.

9. The internal hot welding device for a hemispherical shell according to claim 1, characterized in that, The top of the hot riveting part is provided with a boss, and all the hot riveting heads are vertically arranged on the boss. The top surface of the hot riveting head is arc-shaped and concave to form a hot riveting surface. The inner wall of the positioning mold is provided with a groove for cooperating with the boss, and all the hot welding holes are located in the groove.

10. The internal hot welding device for a hemispherical shell according to claim 1, characterized in that, The working panel is fixed directly above a box. An electric push rod is provided inside the box. The output end of the electric push rod is connected to the hot riveting part through a connector. A U-shaped protective cover is provided on the box. A transparent plate is provided at the opening of the protective cover. The transparent plate and the protective cover form a ring structure around the positioning mold and the pressing mold.

Images