Plastic welding device

Abstract

The embodiment of the utility model provides a plastic welding device. The plastic welding device comprises a laser assembly, a supporting assembly and a pressing assembly, wherein the supporting assembly and the pressing assembly are located in the emitting direction of the laser assembly, and the supporting assembly is located between the pressing assembly and the laser assembly; a to-be-welded part is pressed and fixed between the supporting assembly and the pressing assembly, the end, making contact with the to-be-welded part, of the pressing assembly is a movable body, and under the condition that the movable body moves, the distance between the portion, making contact with the to-be-welded part, of the movable body and the laser assembly is adjustable. Therefore, even if the distance between the to-be-welded part and the movable body is changed due to the fact that the surface, making contact with the movable body, of the to-be-welded part is uneven, the movable body can be pressed on the surface of the to-be-welded part, then the pressing effect of the pressing assembly is improved, and the welding effect of the to-be-welded part is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a plastic welding device. Background Art

[0002] In the relevant plastic product production technology field, it is usually necessary to weld two plastic toolings together by laser. At present, during laser welding, one of the plastic toolings can penetrate the laser, and the other plastic tooling can absorb the laser. When the laser passes through the plastic tooling that can penetrate the laser and is absorbed by the other plastic tooling, the contact surfaces of the two plastic toolings melt and are connected into one under the action of pressure, completing the welding of the plastic toolings. In the process of plastic welding, it is usually necessary to clamp the plastic tooling to be welded by a clamping piece to ensure the welding effect.

[0003] However, when the surface of the plastic tooling to be welded and the pressing member in contact is uneven, it is difficult for the pressing member to always press against the surface of the plastic tooling to be welded, thereby reducing the pressing effect of the pressing member and making it difficult to ensure the welding effect of the plastic tooling to be welded. Utility Model Content

[0004] In order to solve or partially solve the above problems, the utility model discloses a plastic welding device to solve the problem in the prior art that the welding effect is difficult to ensure due to the uneven surface of the plastic tooling to be welded.

[0005] In order to solve the above problems, the embodiment of the utility model provides a plastic welding device, which includes:

[0006] A laser assembly, a support assembly and a pressing assembly located in the emission direction of the laser assembly, wherein the support assembly is located between the pressing assembly and the laser assembly;

[0007] The support assembly and the clamping assembly are used to clamp and fix the workpiece to be welded. The end of the clamping assembly in contact with the workpiece to be welded is a movable body. When the movable body moves, the distance between the contact portion of the movable body and the workpiece to be welded and the laser assembly is adjustable.

[0008] Optionally, the pressing assembly includes a fixing portion and a pressing portion;

[0009] The end of the fixing part facing the clamping assembly has a mounting cavity, the clamping part is the movable body, the clamping part is movably connected in the mounting cavity, and the part of the clamping part that contacts the part to be welded protrudes from the mouth of the mounting cavity.

[0010] Optionally, the movable body is a sphere, the installation cavity is a spherical cavity, the sphere is embedded in the installation cavity, and the sphere can rotate along the center of the sphere.

[0011] Optionally, the movable body is a roller, the roller is hinged in the installation cavity, and the roller can rotate along a first direction (X), and the first direction (X) is a direction intersecting with the emission direction of the laser assembly.

[0012] Optionally, the plastic welding device further includes a connecting assembly;

[0013] The laser assembly, the supporting assembly and the fixing portion are all assembled on the connecting assembly.

[0014] Optionally, the support assembly includes a support plate;

[0015] The support plate extends along a first direction (X), and an end portion of the support plate is detachably connected to the connection assembly, wherein the first direction (X) intersects with an emission direction of the laser assembly.

[0016] Optionally, the support plate includes at least a light-transmitting area, and the light-transmitting area and a welding position of the workpiece to be welded are in relative positions in the first direction (X).

[0017] Optionally, a portion of the support plate other than the light-transmitting area is a support area, and a material strength of the support area is greater than a material strength of the light-transmitting area.

[0018] Optionally, the material of the light-transmitting area is any one of glass material and acrylic material.

[0019] Optionally, the end of the fixing portion away from the clamping assembly is detachably connected to the connecting assembly, and the distance between the end of the fixing portion facing the clamping assembly and the supporting assembly is adjustable.

[0020] Optionally, the end of the fixing portion away from the clamping assembly is a screw structure, and the end of the fixing portion away from the clamping assembly is threadedly connected to the connecting assembly.

[0021] Optionally, the movable body is made of a hard material.

[0022] In the embodiment of the utility model, since the support component and the clamping component are used to clamp and fix the workpiece to be welded, the end of the clamping component in contact with the workpiece to be welded is a movable body, and when the movable body moves, the distance between the part where the movable body contacts the workpiece to be welded and the laser component is adjustable, so when welding the workpiece to be welded, the movable body can roll along with the surface to be welded. In this way, even if the surface of the workpiece to be welded and the movable body in contact is uneven, causing the distance between the workpiece to be welded and the movable body to change, the movable body can be pressed against the surface of the workpiece to be welded, thereby improving the clamping effect of the clamping component and ensuring the welding effect of the workpiece to be welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a plastic welding device provided by an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1-laser assembly; 2-clamping assembly; 3-support assembly; 4-parts to be welded; 5-connecting assembly; 21-fixing part; 22-clamping part. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0029] Figure 1 Schematic diagram of a plastic welding device provided by an embodiment of the utility model. Figure 1 As shown, the plastic welding device comprises:

[0030] A laser assembly 1, a support assembly 3 and a clamping assembly 2 located in the emission direction of the laser assembly 1, wherein the support assembly 3 is located between the clamping assembly 2 and the laser assembly 1;

[0031] The support component 3 and the clamping component 2 are used to clamp and fix the welding part 4, and the end of the clamping component 2 that contacts the welding part 4 is a movable body. When the movable body moves, the distance between the contact part of the movable body and the welding part 4 and the laser component 1 is adjustable.

[0032] It can be seen from the above embodiments that in the embodiment of the utility model, since the support component 3 and the clamping component 2 are used to clamp and fix the workpiece 4 to be welded, the end of the clamping component 2 that contacts the workpiece 4 to be welded is a movable body. When the movable body moves, the distance between the part where the movable body contacts the workpiece 4 to be welded and the laser component 1 is adjustable. Therefore, when welding the workpiece 4 to be welded, the movable body can roll along with the surface to be welded. In this way, even if the surface of the workpiece 4 to be welded and the movable body are uneven, causing the distance between the workpiece 4 to be welded and the movable body to change, the movable body can be pressed against the surface of the workpiece 4 to be welded, thereby improving the clamping effect of the clamping component 2 and ensuring the welding effect of the workpiece 4 to be welded.

[0033] It should be noted that, when welding with the plastic welding device provided in the embodiment of the utility model, the parts to be welded 4 are usually two parts. For example, it can be a weld between a first welding part and a second welding part, and the first welding part and the second welding part are arranged between layers, wherein the first welding part is close to the laser component 1, and the second welding part is far away from the laser component 1, the welding area of ​​the first welding part is made of laser-transmitting material, and the welding area of ​​the second welding part is made of laser-absorbing material.

[0034] In addition, the laser assembly 1 is a device or assembly that uses the heat generated by the laser beam to melt the plastic contact surface, thereby bonding thermoplastic sheets, films or molded parts together. Exemplarily, the process of the laser assembly 1 can be laser transmission welding. The process of this technology is: first clamp a welding part and a second welding part together, and then direct a beam of short-wave infrared laser to the part to be bonded. The laser beam passes through the first welding part and is then absorbed by the second welding part. The laser energy is absorbed so that the material temperature of the second welding part increases, melting the first welding part and the second welding part, so that the first welding part and the second welding part are bonded. Common laser equipment can be laser welding equipment such as neodymium-doped yttrium aluminum garnet synthetic crystal equipment, semiconductor diode equipment or carbon dioxide laser equipment, which is not limited in the embodiment of the utility model.

[0035] In the embodiment of the utility model, the support assembly 3 is a plate-like structure, which, on the one hand, provides the workpiece 4 to be welded with a relatively stable support surface, and on the other hand, makes it more convenient to install and fix the support assembly 3. The end of the clamping assembly 2 arranged on one side of the support assembly 3 and in contact with the workpiece 4 to be welded is a movable body, which can be a sphere, a wheel-shaped rolling structure, or other structures with a circular arc surface, which is not limited in the embodiment of the utility model. The movable body can be movably connected to the main body of the clamping assembly 2, so that when the movable body moves, the distance between the part where the movable body contacts the workpiece 4 to be welded and the laser assembly 1 can be adjusted, that is, the movable body can move along the emission direction of the laser assembly 1, and can adapt to the change in the distance between the workpiece 4 to be welded and the movable body caused by the uneven surface of the contact between the workpiece 4 to be welded and the movable body.

[0036] It should be noted that the movable body is made of a hard material. The hard material may be a metal material, a ceramic material, a glass material, a polymer material, etc., which is not limited in the embodiment of the utility model. In this way, when the movable body is made of a hard material, the movable body can have a greater resistance force without damaging the structure of the movable body due to the increase in the resistance force.

[0037] It should also be noted that according to Figure 1 In the embodiment of the utility model, the X-axis direction and the Z-axis direction intersect. For the convenience of explanation, the first direction is defined as the X-axis direction, and the second direction is defined as the Z-axis direction (that is, the emission direction of the laser assembly 1 in the embodiment of the utility model). Further explanation: the definition of vertical in the specification should be understood as vertical within a 10% fluctuation of 90 degrees, that is, the angle between the first direction and the second direction defined should be understood as vertical if it is between 80 degrees and 90 degrees.

[0038] Next, the specific structure and installation method of the clamping assembly 2 and the supporting assembly 3 provided in the embodiment of the utility model are specifically introduced as follows:

[0039] Regarding the structure of the clamping assembly 2, in some embodiments, the clamping assembly 2 includes a fixing portion 21 and a clamping portion 22; the fixing portion 21 has an installation cavity at the end facing the clamping assembly 2, the clamping portion 22 is a movable body, the clamping portion 22 is movably connected in the installation cavity, and the portion of the clamping portion 22 that contacts the part to be welded 4 protrudes out of the mouth of the installation cavity.

[0040] In this embodiment, the fixing portion 21 is used to fix the clamping portion 22. The shape of the fixing portion 21 can be a cuboid, a cylinder or other columnar structures. The fixing portion 21 has a mounting cavity at the end facing the clamping assembly 2. The shape of the mounting cavity is determined according to the shape of the clamping portion 22. For example, if the movable body is a sphere, the shape of the mounting cavity is a spherical cavity. If the movable body is a roller, the shape of the mounting cavity is a disc. The clamping portion 22 can be movably connected in the mounting cavity by means of hinges, snap-fits, etc., so that the movable body can rotate in the mounting inner cavity. In other words, there is a gap between the edge of the movable body and the inner wall of the mounting inner cavity. When the movable body is squeezed, the gap between the edge of the movable body and the inner wall of the mounting inner cavity can change, so that the movable body can adapt to the change in the distance between the part to be welded 4 and the movable body caused by the uneven surface of the part to be welded 4 in contact with the movable body. In addition, the portion of the clamping part 22 that contacts the workpiece 4 to be welded protrudes out of the mouth of the mounting cavity, that is, the portion of the clamping part 22 that contacts the workpiece 4 to be welded is an arc surface, thereby facilitating contact between the clamping part 22 and the workpiece 4 to be welded.

[0041] Regarding the structure of the pressing portion 22, in one possible implementation, the movable body is a sphere, the mounting cavity is a spherical cavity, the sphere is embedded in the mounting cavity, and the sphere can rotate along the center of the sphere.

[0042] It should be noted that, in this embodiment, the part of the sphere embedded in the mounting cavity of the movable body should be larger than half of the sphere, and the part of the pressing part 22 in contact with the workpiece 4 to be welded should be smaller than half of the sphere. In this way, since the sphere is embedded in the mounting cavity and the sphere can rotate along the center of the sphere, the movable body can form a structure similar to a "ball" in the mounting cavity, and thus the gap between the edge of the sphere and the inner wall of the mounting cavity can change during the rolling process of the movable body, so that the sphere can adapt to the change in the distance between the workpiece 4 to be welded and the sphere caused by the uneven surface of the workpiece 4 to be welded in contact with the sphere. Specifically, when the surface of the workpiece 4 to be welded that the sphere contacts is relatively flat (the distance between the surface of the workpiece 4 to be welded that the sphere contacts and the laser assembly 1 is the first distance), the gap between the edge of the sphere and the inner wall of the mounting cavity is the first gap. When the surface of the part 4 to be welded that the sphere contacts is uneven (the distance between the surface of the part 4 to be welded that the sphere contacts and the laser assembly 1 is less than the first distance), the gap between the edge of the sphere and the inner wall of the cavity of the installation cavity is greater than the first gap. When the surface of the part 4 to be welded that the sphere contacts is uneven (the distance between the surface of the part 4 to be welded that the sphere contacts and the laser assembly 1 is greater than the first distance), the gap between the edge of the sphere and the inner wall of the cavity of the installation cavity is less than the first gap. In this way, the part of the sphere protruding from the installation cavity is always in contact with the surface of the part 4 to be welded, thereby improving the clamping effect of the clamping assembly 2 and ensuring the welding effect of the part 4 to be welded.

[0043] It should also be noted that in the above embodiment, since the movable body is a sphere, the contact between the movable body and the workpiece 4 to be welded is point contact, which can achieve single-point welding compression, reduce the total pressure by point contact to reach the required pressure, and simplify the design of the plastic welding device.

[0044] Regarding the structure of the clamping portion 22 , in one possible implementation, the movable body is a roller, the roller is hinged in the mounting cavity, and the roller can rotate along a first direction (X), and the first direction (X) is a direction intersecting with the emission direction of the laser assembly 1 .

[0045] It should be noted that, in this embodiment, the movable body is a roller, that is, the movable body is a cylindrical rolling structure, the sphere of the movable body embedded in the installation cavity should be larger than half of the cylinder, and the part of the pressing portion 22 that contacts the part to be welded 4 should be smaller than half of the cylinder. The installation cavity can be a disc-shaped inner cavity, and the two ends of the roller are respectively connected to the rotating shaft, and the rotating shafts at both ends of the roller are respectively hinged on the inner wall of the installation inner cavity. In this way, since the roller can rotate along the first direction (X), the roller can form a structure similar to a "milling disc" in the installation cavity, and then the arc surface of the roller can contact the surface of the part to be welded 4 during the rolling process, and then the roller can adapt to the change in the distance between the part to be welded 4 and the sphere caused by the uneven surface of the part to be welded 4 in contact with the sphere. Specifically, when the surface of the workpiece 4 to be welded that the roller contacts is relatively flat (the distance between the surface of the workpiece 4 to be welded that the roller contacts and the laser assembly 1 is the first distance), the distance between the surface of the roller and the line of contact between the workpiece 4 to be welded and the end of the clamping assembly 2 away from the support assembly 3 is the second distance. When the surface of the workpiece 4 to be welded that the roller contacts is uneven (the distance between the surface of the workpiece 4 to be welded that the roller contacts and the laser assembly 1 is less than the first distance), the distance between the surface of the roller and the line of contact between the workpiece 4 to be welded and the end of the clamping assembly 2 away from the support assembly 3 is greater than the second distance. When the surface of the workpiece 4 to be welded that the roller contacts is uneven (the distance between the surface of the workpiece 4 to be welded that the roller contacts and the laser assembly 1 is greater than the first distance), the distance between the surface of the roller and the line of contact between the workpiece 4 to be welded and the end of the clamping assembly 2 away from the support assembly 3 is less than the second distance. In this way, the portion of the roller protruding from the installation inner cavity is always in contact with the surface of the workpiece 4 to be welded, thereby improving the clamping effect of the clamping assembly 2 and ensuring the welding effect of the workpiece 4 to be welded.

[0046] It should also be noted that in the above embodiment, since the movable body is a roller, the contact between the movable body and the workpiece 4 to be welded is line contact, which can increase the contact surface between the clamping assembly 2 and the workpiece 4 to be welded, thereby achieving multi-point simultaneous welding of the workpiece 4 to be welded.

[0047] Regarding the assembly between the laser assembly 1 , the support assembly 3 and the clamping assembly 2 , in some feasible implementations, the plastic welding device further includes a connecting assembly 5 ; the laser assembly 1 , the support assembly 3 and the fixing portion 21 are all assembled on the connecting assembly 5 .

[0048] It should be noted that the connection assembly 5 may include a first connection plate, a second connection plate and a third connection plate, the first connection plate and the third connection plate are respectively connected to the two ends of the second connection plate, the second connection plate may extend along the emission direction of the laser assembly 1, the first connection plate is arranged parallel to the plane where the support assembly 3 is located, and the third connection plate extends parallel to the plane where the support assembly 3 is located. In this way, the support assembly 3 can be fixed on the second connection plate, the laser assembly 1 is fixed on the first connection plate, and the clamping assembly 2 is fixed on the third connection plate, wherein a projection hole can be opened on the first connection plate to facilitate the passage of light from the laser assembly 1. In this way, by assembling the laser assembly 1, the support assembly 3 and the fixing portion 21 on the connection assembly 5, the integrated installation of the entire plastic welding device can be achieved, which is more conducive to the simplified setting of the structure of the plastic welding device.

[0049] Further, with regard to the structure of the support assembly 3, in some embodiments, the support assembly 3 includes a support plate; the support plate extends along a first direction (X), and an end of the support plate is detachably connected to the connecting assembly 5, wherein the first direction (X) intersects with the emission direction of the laser assembly 1.

[0050] In this embodiment, the end of the support plate can be connected to the connection component 5 by means of clamping, riveting or threaded connection, so as to facilitate the disassembly and assembly of the support plate, thereby reducing the installation cost of the plastic welding device. In addition, in some embodiments, a sliding groove can be provided on the connection component 5 so that the end of the support plate is slidably connected to the connection component 5, and the support plate can slide along the emission direction of the laser component 1, and then when the type of the laser component 1 changes and the laser melting point of the laser component 1 changes, the support plate can slide along the emission direction of the laser component 1, so that the support plate can adapt to different types of laser components 1.

[0051] In some feasible implementations, the support plate includes at least a light-transmitting area, and the light-transmitting area and a welding position of the workpiece 4 to be welded are in relative positions in the first direction (X).

[0052] It should be noted that the material of the light-transmitting area includes materials that are transparent to visible light (wavelength 0.39-0.76 μm), infrared light (wavelength 1-1000 μm) and ultraviolet light (wavelength 0.01-0.4 μm). The light-transmitting materials include inorganic light-transmitting materials, polymer light-transmitting materials and light-transmitting composite materials. Exemplarily, the material of the light-transmitting area can be glass, acrylic and other light-transmitting materials, which is not limited in the embodiments of the present invention. The support plate can be a light-transmitting material for the entire plate, or a partial area can be a light-transmitting material, which is not limited in the embodiments of the present invention. In this way, since the support plate includes at least a light-transmitting area, and the light-transmitting area and the welding part of the workpiece 4 to be welded are in relative positions in the first direction (X), it can be ensured that the light of the laser assembly 1 can pass through the support plate to reach the workpiece 4 to be welded.

[0053] Furthermore, in some embodiments, the portion of the support plate other than the light-transmitting area is the support area, and the material strength of the support area is greater than the material strength of the light-transmitting area.

[0054] In this embodiment, since the portion of the support plate other than the light-transmitting area is the support area, the material strength of the support area is greater than the material strength of the light-transmitting area, and therefore the overall strength of the support plate can be enhanced through the support area. On the one hand, it is convenient to improve the supporting strength of the support plate for the welded part 4, and on the other hand, it is convenient to improve the overall strength of the support plate, reduce the probability of the support plate breaking, and improve the service life of the support plate.

[0055] Regarding the assembly of the clamping assembly 2, in some embodiments, the end of the fixing portion 21 away from the clamping assembly 2 is detachably connected to the connecting assembly 5, and the distance between the end of the fixing portion 21 toward the clamping assembly 2 and the supporting assembly 3 is adjustable.

[0056] In this embodiment, the end of the fixing portion 21 away from the clamping assembly 2 can be detachably connected to the connecting assembly 5 by means of threaded connection, clamping, riveting, etc., so as to facilitate the disassembly and assembly of the clamping assembly 2. Since the distance between the end of the fixing portion 21 facing the clamping assembly 2 and the supporting assembly 3 is adjustable, when the thickness of the workpiece 4 to be welded (the size of the weldment in the emission direction of the laser assembly 1) changes, the distance between the end of the fixing portion 21 facing the clamping assembly 2 and the supporting assembly 3 can be adjusted, so that the clamping assembly 2 can adapt to a wider range of types of workpieces 4 to be welded, thereby improving the application range of the plastic welding device provided by the embodiment of the utility model.

[0057] In some feasible embodiments, the end of the fixing portion 21 away from the clamping assembly 2 is a screw structure, and the end of the fixing portion 21 away from the clamping assembly 2 is threadedly connected to the connecting assembly 5. In this way, when the thickness of the workpiece 4 to be welded (the size of the weldment in the emission direction of the laser assembly 1) changes, the distance between the end of the fixing portion 21 facing the clamping assembly 2 and the supporting assembly 3 can be directly adjusted by twisting the screw at the end of the fixing portion 21 away from the clamping assembly 2, so that the clamping assembly 2 can adapt to a wider range of types of workpieces 4 to be welded.

[0058] It can be seen from the above embodiments that in the embodiment of the utility model, since the support component 3 and the clamping component 2 are used to clamp and fix the workpiece 4 to be welded, the end of the clamping component 2 that contacts the workpiece 4 to be welded is a movable body. When the movable body moves, the distance between the part where the movable body contacts the workpiece 4 to be welded and the laser component 1 is adjustable. Therefore, when welding the workpiece 4 to be welded, the movable body can roll along with the surface to be welded. In this way, even if the surface of the workpiece 4 to be welded and the movable body are uneven, causing the distance between the workpiece 4 to be welded and the movable body to change, the movable body can be pressed against the surface of the workpiece 4 to be welded, thereby improving the clamping effect of the clamping component 2 and ensuring the welding effect of the workpiece 4 to be welded.

[0059] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0060] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0061] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0062] The utility model has been introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A plastic welding device, characterized in that: The plastic welding device comprises: A laser component (1), a support component (3) and a clamping component (2) located in the emission direction of the laser component (1), wherein the support component (3) is located between the clamping component (2) and the laser component (1); The support assembly (3) and the clamping assembly (2) are used to clamp and fix the workpiece to be welded; the end of the clamping assembly (2) in contact with the workpiece to be welded (4) is a movable body; when the movable body moves, the distance between the contact portion of the movable body and the workpiece to be welded (4) and the laser assembly (1) is adjustable.

2. The plastic welding device according to claim 1, characterized in that: The pressing assembly (2) comprises a fixing portion (21) and a pressing portion (22); The fixing portion (21) has an installation cavity at the end portion facing the clamping assembly (2); the clamping portion (22) is the movable body; the clamping portion (22) is movably connected in the installation cavity; and the portion of the clamping portion (22) that contacts the part to be welded (4) protrudes out of the mouth of the installation cavity.

3. The plastic welding device according to claim 2, characterized in that: The movable body is a sphere, the installation cavity is a spherical cavity, the sphere is embedded in the installation cavity, and the sphere can rotate along the center of the sphere.

4. The plastic welding device according to claim 2, characterized in that: The movable body is a roller, the roller is hinged in the installation cavity, and the roller can rotate along a first direction (X), and the first direction (X) is a direction intersecting with the emission direction of the laser component (1).

5. The plastic welding device according to claim 2, characterized in that: The plastic welding device also includes a connecting component (5); The laser component (1), the support component (3) and the fixing portion (21) are all assembled on the connecting component (5).

6. The plastic welding device according to claim 5, characterized in that: The support assembly (3) comprises a support plate; The support plate extends along a first direction (X), and an end portion of the support plate is detachably connected to the connection component (5), wherein the first direction (X) intersects with an emission direction of the laser component (1).

7. The plastic welding device according to claim 6, characterized in that: The support plate comprises at least a light-transmitting area, and the light-transmitting area and a welding position of the workpiece (4) to be welded are in relative positions in the first direction (X).

8. The plastic welding device according to claim 7, characterized in that: The portion of the support plate other than the light-transmitting area is a support area, and the material strength of the support area is greater than the material strength of the light-transmitting area.

9. The plastic welding device according to claim 7, characterized in that: The material of the light-transmitting area is any one of glass material and acrylic material.

10. The plastic welding device according to claim 5, characterized in that: The end of the fixing portion (21) away from the pressing assembly (2) is detachably connected to the connecting assembly (5), and the distance between the end of the fixing portion (21) facing the pressing assembly (2) and the supporting assembly (3) is adjustable.

11. The plastic welding device according to claim 10, characterized in that: The end of the fixing portion (21) away from the pressing assembly (2) is a screw structure, and the end of the fixing portion (21) away from the pressing assembly (2) is threadedly connected to the connecting assembly (5).

12. The plastic welding device according to claim 1, characterized in that: The movable body is made of hard material.

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