Automatic welding device and welding method for mask breather valve

Abstract

The invention provides a mask breather valve automatic welding device which comprises a workbench, three welding mechanisms and an ultrasonic generator, the three welding mechanisms are arranged on the workbench, and each welding mechanism comprises a mounting base, a rotating shaft assembly, a welding head assembly, a rotation driving assembly and a linear driving assembly; the welding head assembly comprises a plurality of welding heads which are mutually independent and are arranged at equal intervals in the circumferential direction, and when one welding head is located at the material taking position, the other welding head is located at the welding position; the rotation driving assembly is used for driving the welding head assembly to rotate. The linear driving assembly is used for driving the welding head to move in the vertical direction and has the initial state that the linear driving assembly does not make contact with the welding head. The device can flexibly meet the welding requirements of a single-breather-valve mask and a double-breather-valve mask, the welding head assembly can continuously rotate by 360 degrees, the low-efficiency process that a welding head frequently goes back and forth in traditional welding equipment is avoided, and higher efficiency is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of mask production equipment, and particularly relates to an automatic welding device and a welding method for mask breathing valves. Background Art

[0002] In mask production, the welding of breathing valves is one of the key links. Currently, the breathing valve welding technology mainly adopts ultrasonic welding. Through tools such as robotic arms or suction cups, the breathing valve is grabbed from the material taking position and transferred to the welding position, and the breathing valve is firmly welded to the mask by using ultrasonic welding technology.

[0003] Most of the current welding devices adopt the method of single material taking and welding. The welding head needs to suck the breathing valve at the material taking position, then move to the welding position for welding. After welding is completed, it returns to the material taking position. This process not only increases the moving time of the welding head but also leads to an extended production cycle and low welding efficiency. In addition, the existing automatic welding devices are mainly for single breathing valve masks and cannot meet the welding requirements of double breathing valve masks. Summary of the Invention

[0004] The object of the present invention is to provide a novel automatic welding device for mask breathing valves, which can meet the welding requirements of single breathing valve masks and double breathing valve masks and has high welding effect.

[0005] Another object of the present invention is to provide a welding method based on the above automatic welding device for mask breathing valves.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] On the one hand, the present invention provides an automatic welding device for mask breathing valves, including a workbench, a welding mechanism, and an ultrasonic generator. There are three groups of the welding mechanisms arranged on the workbench. Two of the welding mechanisms are symmetrically arranged along a first direction, and the remaining one welding mechanism is symmetrically arranged with any one of the two welding mechanisms along a second direction. The first direction is perpendicular to the second direction. Each workbench where the welding mechanism is located has a welding position and a material taking position.

[0008] The welding mechanism includes:

[0009] A mounting seat, which is mounted on the workbench;

[0010] A rotating shaft assembly, which includes a bushing fixedly connected to the mounting seat and a rotating shaft rotatably arranged in the bushing. A plurality of independent air guiding channels are formed between the bushing and the rotating shaft, and both ends of the air guiding channel are located on the bushing and the rotating shaft respectively.

[0011] A welding head assembly, which includes a plurality of independent welding heads arranged at equal intervals in the circumferential direction. The welding heads are connected to the rotating shaft and are at least connected to one air guide channel. When one welding head is at the material taking position, another welding head is at the welding position. The welding head has a suction cup capable of sucking the breathing valve.

[0012] A rotation driving assembly, which is arranged on the mounting base and its output shaft is connected to the rotating shaft for driving the rotating shaft to rotate; and,

[0013] A linear driving assembly, which is arranged on the mounting base. It has a first linear driving assembly located above the material taking position and capable of driving the welding head at the material taking position to move in the up and down direction, and a second linear driving assembly located above the welding position and capable of driving the welding head at the welding position to move in the up and down direction. The first linear driving assembly and the second linear driving assembly respectively have an initial state where they do not contact the welding head at their respective positions and a working state where they contact the welding head at their respective positions and can drive the welding head to move.

[0014] Preferably, the welding head includes a connecting seat fixedly connected to the rotating shaft, a welding head body slidably arranged on the connecting seat in the up and down direction and adapted to the breathing valve, and an elastic member abutted between the welding head body and the connecting seat. The elastic member makes the welding head body have a tendency to move upward and reset, and the suction cup is arranged at the lower end of the welding head body.

[0015] In some embodiments, the welding head further includes a guiding groove arranged on the connecting seat and extending in the up and down direction, and a guiding post slidably arranged in the guiding groove and extending in the same direction as the guiding groove. The guiding post is connected to the welding head body.

[0016] In some embodiments, the elastic member is a spring.

[0017] In some embodiments, the plurality of welding heads in each welding mechanism share one connecting seat.

[0018] In some embodiments, the welding head body has an air guide port, and the air guide port on the welding head body is connected to the air guide channel through a pipeline.

[0019] Preferably, the welding position and the material taking position are respectively arranged on opposite sides of the rotating shaft.

[0020] In some embodiments, the workbench where each welding mechanism is located further has a welding preparation position and a material taking preparation position. The welding preparation position and the material taking preparation position are respectively located on the front and rear sides of the rotating shaft. The welding position and the material taking position are respectively arranged on the left and right sides of the rotating shaft. There are four welding heads corresponding to the welding position, the material taking position, the welding preparation position and the material taking preparation position, and the welding heads are located directly above their corresponding positions.

[0021] Preferably, a first air guide port corresponding to the welding head is formed on the shaft sleeve. The rotating shaft has an annular groove and a gas channel corresponding to the first air guide port and not communicating with each other. The annular groove is located on the outer surface of the rotating shaft and is connected to the corresponding first air guide port and gas channel. The first air guide port, its corresponding annular groove and gas channel form a gas guide cavity.

[0022] In some embodiments, the gas guide cavities are arranged in one-to-one correspondence with the welding heads.

[0023] Preferably, the second linear drive assembly includes a linear drive motor installed on the mounting seat, a drive seat slidably arranged on the mounting seat in the up and down direction, and an elastic buffer member located between the output end of the linear drive motor and the drive seat.

[0024] Preferably, the welding mechanism further includes a feeding mechanism for feeding materials to the material taking position.

[0025] The second aspect of the present invention provides a welding method for a mask breathing valve. Based on the above mask breathing valve automatic welding device, the welding method includes:

[0026] Determine the type of the mask to be welded, and the type includes a single breathing valve mask and a double breathing valve mask;

[0027] When the type of the mask to be welded is a single breathing valve mask, start two groups of welding mechanisms symmetrically arranged in the second direction to simultaneously weld two groups of single-sided breathing valves on the mask cloth to be welded, and close the remaining other group of welding mechanisms;

[0028] When the type of the mask to be welded is a double breathing valve mask, start two groups of welding mechanisms symmetrically arranged in the first direction to simultaneously weld the double-sided breathing valves on the mask cloth to be welded, and close the remaining other group of welding mechanisms.

[0029] Among them, starting the welding mechanism for welding includes controlling the welding head assembly to perform the material taking action and the welding action simultaneously. The material taking action includes controlling the first linear driving assembly to drive the welding head at the material taking position to move downward and suck the breathing valve at the material taking position; the welding action includes controlling the second linear driving assembly to drive the welding head at the welding position to move downward and cooperate with the ultrasonic generator to weld the breathing valve onto the mask.

[0030] Preferably, starting the welding mechanism further includes enabling the welding head assembly to perform a 360° forward or reverse rotation, and the welding head assembly pauses after rotating a certain angle to perform the material taking action and the welding action.

[0031] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0032] Through the arrangement of three groups of welding head mechanisms, the present invention can flexibly meet the welding requirements of single-breathing-valve masks and double-breathing-valve masks. By arranging multiple groups of welding heads on the welding head mechanism and enabling them to rotate and switch, when one welding head is performing a welding operation, another welding head can simultaneously suck the breathing valve at the material taking position, eliminating the need to wait for the previous welding action to complete before taking the material, thus improving the welding efficiency. In addition, the present invention also designs the rotating shaft assembly, the welding head assembly, the linear driving assembly, etc., so that components such as the linear driving assembly do not interfere with the rotation of the welding head assembly, enabling the welding head assembly to achieve a continuous 360° rotation and avoiding the inefficient process of the frequent back-and-forth movement of the welding head in traditional welding equipment. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 Structural schematic diagram of the automatic mask breathing valve welding device provided in Embodiment 1;

[0035] Figure 2 Front view of the automatic mask breathing valve welding device provided in Embodiment 1;

[0036] Figure 3 Structural schematic diagram of the mask breathing valve welding mechanism provided in Embodiment 1;

[0037] Figure 4 Right view of the mask breathing valve welding mechanism provided in Embodiment 1;

[0038] Figure 5Schematic structural diagram of the welding head provided for Embodiment 1;

[0039] Figure 6 Cross-sectional view of the welding head provided for Embodiment 1;

[0040] Figure 7 Schematic structural diagram of the rotating shaft assembly provided for Embodiment 1;

[0041] Figure 8 Cross-sectional view of the rotating shaft assembly provided for Embodiment 1;

[0042] Wherein, 1. Welding mechanism; 11. Mounting seat; 12. Welding head assembly; 121. Welding head body; 122. Connecting seat; 123. Elastic member; 124. Suction cup; 125. Guide post; 13. Rotating shaft assembly; 131. Bushing; 1311. First air guide port; 132. Rotating shaft; 1321. Annular groove; 1322. Gas passage; 1323. Second air guide port; 14. Rotating drive assembly; 15. First linear drive assembly; 16. Second linear drive assembly; 161. Linear drive motor; 162. Drive seat; 163. Elastic buffer member;

[0043] 2. Workbench;

[0044] 3. Feeding mechanism;

[0045] 4. Mask. Detailed implementation manners

[0046] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0047] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the appended drawings. For example, the position where the welding head is located is lower, and the position where the first linear drive assembly 15 is located is left. The description of the above orientation words is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present invention. Figure 1

[0048] ​In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, the meaning of "a plurality of" is two or more unless otherwise specifically defined.

[0049] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0050] The following disclosure provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0051] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0052] Embodiment 1

[0053] An automatic welding device for a mask breathing valve, as Figures 1 to 8As shown in the figure, it includes a workbench 2, a welding mechanism 1, and an ultrasonic generator (not shown in the figure). The welding mechanism 1 has three groups arranged on the workbench 2, namely, welding mechanism A, welding mechanism B, and welding mechanism C. Among them, two groups of welding mechanisms 1 are symmetrically arranged along the first direction, and the remaining group of welding mechanism 1 is symmetrically arranged with any one of the two groups of welding mechanisms 1 along the second direction. The first direction is perpendicular to the second direction. In this embodiment, welding mechanism A and welding mechanism B are symmetrically arranged along the first direction, and welding mechanism A and welding mechanism C are symmetrically arranged along the second direction. The first direction is the width direction of the workbench 2, and the second direction is the length direction of the workbench 2. By setting three groups of welding mechanisms 1, it is possible to flexibly meet the welding requirements of single-breathing-valve masks and double-breathing-valve masks. For example, when the type of the mask to be welded is a single-breathing-valve mask, start welding mechanism A and welding mechanism B to simultaneously weld two groups of single-sided breathing valves, which is more efficient. When the type of the mask to be welded is a double-breathing-valve mask, start welding mechanism A and welding mechanism B to simultaneously weld the double-sided breathing valves of the mask cloth to be welded, which is convenient and fast. The distance between welding mechanism A and welding mechanism B is designed according to the distance between the breathing valve openings on both sides of the double-breathing-valve mask to be welded, and the distance between welding mechanism A and welding mechanism C is designed according to the distance between two adjacent single-breathing-valve masks to be welded. Usually, multiple masks to be welded are connected together and transported along a specific direction by a conveying mechanism.

[0054] Each workbench 2 where the welding mechanism 1 is located has a welding position and a material taking position. A breathing valve feeding mechanism 3 is provided at the material taking position of the workbench 2 for conveying breathing valves to the material taking position. The material conveying mechanism includes, but is not limited to, a conveyor belt, etc., which can refer to the prior art. An ultrasonic generator is provided at the welding position of the workbench 2, which can cooperate with the welding mechanism 1 to weld the breathing valve to the mask 4. The workbench 2 and the ultrasonic generator can refer to the prior art, and will not be elaborated in this application. The following takes one group of welding mechanisms 1 as an example for detailed description.

[0055] The welding mechanism 1 includes a mounting seat 11, a rotating shaft assembly 13, a welding head assembly 12, a rotating drive assembly 14, and a linear drive assembly.

[0056] The mounting seat 11 is mounted on the workbench 2. The three groups of welding mechanisms 1 can share one mounting seat 11, or two groups of welding mechanisms 1 can share one mounting seat 11, or each uses one mounting seat 11. In this embodiment, welding mechanism A and welding mechanism B share one mounting seat 11, and welding mechanism C uses one mounting seat 11 alone.

[0057] The welding head assembly 12 is rotatably arranged on the mounting seat 11 through the rotating shaft assembly 13. The welding head assembly 12 includes a plurality of mutually independent welding heads arranged at equal intervals in the circumferential direction. When one welding head is in the material taking position, another welding head is in the welding position. The welding head has a suction cup 124 capable of sucking the breathing valve.

[0058] In the existing automatic welding device for mask breathing valves, the welding head usually needs to move back and forth between the material taking position and the welding position. After completing a single material taking and welding operation, it returns to the material taking position again. This single-thread operation mode greatly limits the production efficiency. By setting multiple welding heads and enabling them to rotate and switch, when one welding head is performing a welding operation, another welding head can simultaneously suck the breathing valve at the material taking position. This parallel operation mode avoids the inefficient process of the frequent back-and-forth movement of the welding head in traditional welding equipment and significantly shortens the production cycle. The applicant further found through research that when there are two welding heads, the two welding heads need to rotate and switch by 180°, and the rotation angle is relatively large. Once the rotation speed is relatively fast, it will cause the jitter of the welding head assembly 12, which is not conducive to the smooth progress of welding. When the number of welding head assemblies 12 exceeds four, it will lead to an increase in cost. Considering the comprehensive cost, efficiency, and welding stability, the welding heads are preferably four, that is, the included angle between two adjacent welding heads to the rotation axis line of the welding head assembly 12 is 90°.

[0059] Specifically, the welding head includes a connecting seat 122, a welding head body 121 that is slidably arranged on the connecting seat 122 in the up-and-down direction and is adapted to the breathing valve, and an elastic member 123 that abuts between the welding head body 121 and the connecting seat 122. The elastic member 123 enables the welding head body 121 to have a tendency to move upward and reset. A suction cup 124 is arranged at the lower end of the welding head body 121. Preferably, the welding head further includes a guide groove that is arranged on the connecting seat 122 and extends in the up-and-down direction, and a guide post 125 that is slidably arranged in the guide groove and is consistent with the extending direction of the guide groove. The guide post 125 is connected to the welding head body 121 and is used to limit the up-and-down sliding of the welding head body 121. Preferably, multiple welding heads on the welding head assembly 12 share a connecting seat 122.

[0060] In the existing linear drive assembly, the output shaft is connected to the welding head and is used to drive the welding head to move for material taking and welding actions. The linear drive assembly rotates synchronously with the welding head, which is very inconvenient. The applicant creatively does not connect the output shaft of the linear drive assembly to the welding head, avoiding the rotation of the linear drive assembly. At the same time, there is no need to set a linear drive assembly on each welding head. Only linear drive assemblies need to be set at the welding position and the material taking position, and the cost is lower. Specifically, the linear drive assembly is arranged on the mounting seat 11. It has a first linear drive assembly 15 located above the material taking position and capable of driving the welding head at the material taking position to move in the up-and-down direction, and a second linear drive assembly 16 located above the welding position and capable of driving the welding head at the welding position to move in the up-and-down direction. The first linear drive assembly 15 and the second linear drive assembly 16 respectively have an initial state in which they do not contact the welding head at their respective positions and a working state in which they contact the welding head at their respective positions and are capable of driving the welding head to move.

[0061] The first linear drive assembly 15 is a linear drive motor. The second linear drive assembly 16 includes a linear drive motor 161 mounted on the mounting base 11, a drive base 162 slidably disposed on the mounting base 11 in the vertical direction, and an elastic buffer 163 located between the output end of the linear drive motor 161 and the drive base 162. The setting of the elastic buffer 163 can reduce the rigid connection between the output shaft and the drive base 162, make the welding process more stable, reduce welding instability caused by load changes or external interference, and ensure the welding quality. The elastic buffer 163 is preferably a spring.

[0062] Since the welding head is connected to a vacuum suction device (such as a vacuum pump) through a vacuum tube, when the welding head rotates continuously forward or backward, the vacuum tube thereon will be twisted or wound, so a 360° continuous forward or backward rotation cannot be achieved. The applicant further designed the rotating shaft assembly 13 to avoid the interference of the vacuum tube when the welding head rotates. Specifically, the rotating shaft assembly 13 includes a shaft sleeve 131 fixedly connected to the mounting base 11 and a rotating shaft 132 rotatably disposed within the shaft sleeve 131. The vacuum tube is connected to the shaft sleeve 131, and both ends of the rotating shaft 132 are respectively connected to the rotating drive assembly 14 and the connecting seat 122 of the welding head assembly 12. By driving the rotation of the rotating shaft 132 while the shaft sleeve 131 remains stationary, the winding or twisting of the vacuum tube caused by the rotation of the welding head is avoided. A plurality of mutually independent air guiding channels are formed between the shaft sleeve 131 and the rotating shaft 132, and both ends of the air guiding channels are respectively located on the shaft sleeve 131 and the rotating shaft 132 and communicate with the welding head and the vacuum suction device. In this embodiment, the air guiding channels are provided in one-to-one correspondence with the welding heads, that is, there are specifically four air guiding channels. Further, the shaft sleeve 131 is provided with a first air guiding port 1311 corresponding to the welding head, and the first air guiding port 1311 is connected to the vacuum tube. The rotating shaft 132 has an annular groove 1321 and a gas channel 1322 corresponding to the first air guiding port 1311. The annular groove 1321 is located on the outer surface of the rotating shaft 132 and communicates with the corresponding first air guiding port 1311. One end of the gas channel 1322 communicates with the corresponding annular groove 1321, and the other end (i.e., the second air guiding port 1323) is connected to the corresponding welding head and communicates with the welding head. Specifically, it can be connected to the air guiding port of the welding head body 121 through a flexible pipe. When taking materials, the first air guiding port 1311, the annular groove 1321, the gas channel 1322, and the second air guiding port 1323 form an air flow path to communicate the welding head and the vacuum suction device.

[0063] The rotation drive assembly 14 is used to drive the rotation of the welding head assembly 12. Specifically, the rotation drive assembly 14 is located between the first linear drive assembly 15 and the second linear drive assembly 16, and its output shaft is connected to the rotating shaft 132 and can drive the rotating shaft 132 to drive the welding head assembly 12 to rotate around the vertical direction.

[0064] Working principle:

[0065] Determine the type of the mask to be welded, where the type includes single-breathing-valve masks and double-breathing-valve masks.

[0066] When the type of the mask to be welded is a single-breathing-valve mask, start two sets of welding mechanisms 1 symmetrically arranged in the second direction (i.e., welding mechanism A and welding mechanism C) to simultaneously weld two sets of single-side breathing valves on the mask cloth to be welded, and close the remaining set of welding mechanism 1 (i.e., welding mechanism B).

[0067] When the type of the mask to be welded is a double-breathing-valve mask, start two sets of welding mechanisms 1 symmetrically arranged in the first direction (i.e., welding mechanism A and welding mechanism B) to simultaneously weld double-side breathing valves on the mask cloth to be welded, and close the remaining set of welding mechanism 1 (i.e., welding mechanism C).

[0068] Among them, starting the welding mechanism 1 for welding includes: controlling the output shaft of the first linear drive assembly 15 to move downward to push the welding head below it (i.e., the welding head at the material-taking position) to move downward synchronously, controlling the welding head to suck the breathing valve, and then controlling the first linear drive assembly 15 to reset. At this time, the welding head moves upward and resets under the elastic force of its elastic member 123, and the material-taking is completed. Then, control the rotation drive assembly 14 to drive the rotating shaft 132 to rotate the welding head assembly 12 by 90°, so that the welding head sucking the breathing valve rotates to the welding preparation position, and the welding head originally at the material-taking preparation position rotates to the material-taking position, and control the welding head and the first linear drive assembly 15 at the material-taking position to take materials. Then, control the rotation drive assembly 14 to drive the rotating shaft 132 to rotate the welding head assembly 12 by 90° again. At this time, the welding head at the welding preparation position and sucking the breathing valve rotates to the welding position, the welding head at the material-taking position and sucking the breathing valve rotates to the welding preparation position, and the welding head at the material-taking preparation position rotates to the material-taking position. Control the output shaft of the second linear drive assembly 16 to move downward and push the welding head below it (i.e., the welding head at the welding position) to move downward synchronously, and cooperate with the ultrasonic generator to weld the breathing valve on the mask 4. After that, control the welding head to break the vacuum and release the breathing valve and control the second linear drive assembly 16 to reset. At this time, the welding head at the welding position moves upward and resets under the elastic force of its elastic member 123, and the welding is completed; at the same time, control the first linear drive assembly 15 to take materials. Control the rotation drive assembly 14 to drive the rotating shaft 132 to rotate the welding head assembly 12 by 90° again. The welding head in the welding area and with the breathing valve released rotates to the material-taking preparation area, and so on, and the welding of the breathing valve can be continuously carried out.

[0069] The above embodiments are only used to illustrate the technical concept and features of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and it should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An automatic welding device for a mask breathing valve, comprising a workbench (2), a welding mechanism (1) and an ultrasonic generator, characterized in that: The welding mechanism (1) has three groups arranged on the workbench (2), where two groups of welding mechanisms (1) are symmetrically arranged along a first direction, and the remaining one group of welding mechanism (1) is symmetrically arranged with any one of the two groups of welding mechanisms (1) along a second direction, the first direction being perpendicular to the second direction. Each workbench (2) where the welding mechanism (1) is located has a welding position and a material taking position. The welding mechanism (1) includes: A mounting seat (11), the mounting seat (11) being mounted on the workbench (2); A rotating shaft assembly (13), the rotating shaft assembly (13) including a bushing (131) fixedly connected to the mounting seat (11) and a rotating shaft (132) rotatably arranged in the bushing (131). A plurality of mutually independent air guiding channels are formed between the bushing (131) and the rotating shaft (132), and the two ports of the air guiding channel are respectively located on the bushing (131) and the rotating shaft (132); A welding head assembly (12), the welding head assembly (12) including a plurality of mutually independent welding heads arranged at equal intervals in the circumferential direction. The welding heads are connected to the rotating shaft (132) and are at least connected to one air guiding channel. When one welding head is at the material taking position, another welding head is at the welding position. The welding head has a suction cup (124) capable of sucking the breathing valve; A rotation driving assembly (14), the rotation driving assembly (14) being arranged on the mounting seat (11) and its output shaft being connected to the rotating shaft (132) for driving the rotating shaft (132) to rotate; and, A linear driving assembly, the linear driving assembly being arranged on the mounting seat (11). It has a first linear driving assembly (15) located above the material taking position and capable of driving the welding head at the material taking position to move in the up and down direction, and a second linear driving assembly (16) located above the welding position and capable of driving the welding head at the welding position to move in the up and down direction. The first linear driving assembly (15) and the second linear driving assembly (16) respectively have an initial state where they do not contact the welding head at their respective positions and a working state where they contact the welding head at their respective positions and can drive the welding head to move.

2. The automatic welding device for the mask breathing valve according to claim 1, wherein The welding head includes a connecting seat (122) fixedly connected to the rotating shaft (132), a welding head body (121) slidably arranged on the connecting seat (122) in the up and down direction and adapted to the breathing valve, and an elastic member (123) abutted between the welding head body (121) and the connecting seat (122). The elastic member (123) makes the welding head body (121) have a tendency to move upward and reset. The suction cup (124) is arranged at the lower end of the welding head body (121).

3. The automatic welding device for the mask breathing valve according to claim 2, wherein The welding head further includes a guiding groove extending in the up and down direction and arranged on the connecting seat (122), and a guiding post slidably arranged in the guiding groove and having an extending direction consistent with the guiding groove. The guiding post (125) is connected to the welding head body (121); and / or, The elastic member (123) is a spring; and / or, A plurality of welding heads in each set of welding mechanisms (1) share a connecting seat (122).

4. The automatic welding device for a mask breathing valve according to claim 1, characterized in that, The welding position and the material taking position are respectively arranged on opposite sides of the rotating shaft (132).

5. The automatic welding device for the mask breathing valve according to claim 4, wherein, The workbench (2) where each set of welding mechanisms (1) is located further has a welding preparation position and a material taking preparation position. The welding preparation position and the material taking preparation position are respectively located on the front and rear sides of the rotating shaft (132), and the welding position and the material taking position are respectively arranged on the left and right sides of the rotating shaft (132). There are four welding heads corresponding to the welding position, the material taking position, the welding preparation position, and the material taking preparation position, and the welding heads are located directly above their corresponding positions.

6. The automatic welding device for mask breathing valves according to claim 1, characterized in that, A first air guide port (1311) corresponding to the welding head is formed on the shaft sleeve (131). The rotating shaft (132) has an annular groove (1321) and a gas passage (1322) that are correspondingly arranged with the first air guide port (1311) and do not communicate with each other. The annular groove (1321) is located on the outer surface of the rotating shaft (132) and is connected to the corresponding first air guide port (1311) and gas passage (1322). The first air guide port (1311), its corresponding annular groove (1321), and gas passage (1322) form a gas guide cavity.

7. The automatic welding device for a mask breathing valve according to claim 1, wherein, The second linear drive assembly (16) includes a linear drive motor (161) installed on the mounting seat (11), a drive seat (162) slidably arranged on the mounting seat (11) in the up and down direction, and an elastic buffer (163) located between the output end of the linear drive motor (161) and the drive seat (162).

8. The automatic welding device for a mask breathing valve according to claim 1, characterized in that, The welding mechanism (1) further includes a feeding mechanism (3) for feeding materials to the material taking position.

9. A welding method for a mask breathing valve, characterized in that, Based on the automatic mask breathing valve welding device according to any one of claims 1 to 8, the welding method includes: Determining the type of the mask to be welded, where the type includes single breathing valve masks and double breathing valve masks; When the type of the mask to be welded is a single breathing valve mask, start two sets of welding mechanisms (1) symmetrically arranged in the second direction to simultaneously weld two sets of single-sided breathing valves on the mask cloth to be welded, and close the remaining set of welding mechanisms (1); When the type of the mask to be welded is a double breathing valve mask, start two sets of welding mechanisms (1) symmetrically arranged in the first direction to simultaneously weld double-sided breathing valves on the mask cloth to be welded, and close the remaining set of welding mechanisms (1). Among them, starting the welding mechanism (1) for welding includes controlling the welding head assembly (12) to perform a material taking action and a welding action simultaneously. The material taking action includes controlling the first linear drive assembly (15) to drive the welding head at the material taking position to move downward and suck the breathing valve at the material taking position; the welding action includes controlling the second linear drive assembly (16) to drive the welding head at the welding position to move downward and cooperate with the ultrasonic generator to weld the breathing valve on the mask (4).

10. The welding method of the mask breathing valve according to claim 9, characterized in that, Starting the welding mechanism (1) further includes rotating the welding head assembly (12) 360° forward or backward, and the welding head assembly (12) pauses after rotating a certain angle to perform the material taking action and the welding action.

Images