Welding fixture

Abstract

The invention provides a welding fixture, and relates to the technical field of laser welding equipment. The welding clamp comprises a base plate, at least one driving piece and a plurality of pressing assemblies, and the base plate is provided with a plurality of light inlets. The driving end of the driving piece is connected with the substrate; the pressing assembly comprises a sealing cover, a base, a pressing cover, a pressure sensor, an elastic piece and a guiding piece, the sealing cover is connected with the base plate, the base is movably arranged in the sealing cover, the pressing cover is arranged at the end, away from the sealing cover, of the base, the pressure sensor is arranged between the sealing cover and the base, and one end of the elastic piece abuts against the pressure sensor; the end, away from the pressure sensor, of the elastic piece abuts against the base, the guiding piece penetrates through the sealing cover, the pressure sensor, the elastic piece and the base, and a light outlet corresponding to the light inlet is formed in the pressing cover. When the multiple pressing covers respectively press a workpiece, different pressure sensors can respectively detect the pressure of the matched pressing covers on the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding equipment, and in particular to a welding fixture. Background Art

[0002] Laser welding has strict requirements on the gap between workpieces, and a clamp is needed to hold the workpieces tight. At present, when the existing clamp presses down the workpiece, the operator cannot judge whether the pressure applied by the clamp on the workpiece can close the gap between the workpieces, and whether the pressure applied by the clamp on the workpiece will damage the workpiece. Summary of the invention

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a welding fixture.

[0004] The present invention provides the following technical solutions:

[0005] A welding fixture, comprising:

[0006] A substrate having a plurality of light inlets;

[0007] at least one driving member, wherein a driving end of the driving member is connected to the base plate;

[0008] Multiple clamping components, the clamping components include a sealing cover, a base, a clamping cover, a pressure sensor, an elastic member and a guide member, the sealing cover is connected to the substrate, the base is movably arranged in the sealing cover, the clamping cover is arranged on the side of the base away from the sealing cover, the pressure sensor is arranged between the sealing cover and the base, one end of the elastic member abuts against the pressure sensor, and the end of the elastic member away from the pressure sensor abuts against the base, the guide members are respectively penetrated through the sealing cover, the pressure sensor, the elastic member and the base, and a light outlet corresponding to the light inlet is opened on the clamping cover.

[0009] In a possible embodiment, the clamping assembly also includes a connecting part, which has a connecting part, a first protrusion, an adjusting part, and a second protrusion in sequence along the axial direction. The connecting part is detachably connected to the base, the adjusting part is passed through the clamping cover, and the second protrusion is arranged on a side of the clamping cover away from the base. The outer diameter of the adjusting part is smaller than the outer diameter of the first protrusion and the outer diameter of the second protrusion.

[0010] In a possible implementation, the welding fixture further includes an air suction duct having a plurality of air suction ports, the plurality of air suction ports are respectively disposed in the plurality of light inlets, and the interior of the air suction ports is connected to the light outlet.

[0011] In a possible implementation, the vertical distance from the air suction port to the light outlet is 10-15 mm.

[0012] In a possible embodiment, the welding fixture also includes an air intake assembly, which includes a first air intake member and a plurality of second air intake members, the air intake ends of the plurality of second air intake members are respectively connected to the air outlet ends of the first air intake member, the air outlet ends of the second air intake members are connected to the chamber in the base, and the chamber in the base is connected to the light outlet.

[0013] In a possible implementation, the air intake assembly further includes a plurality of flow sensors, and the flow sensors are disposed between the first air intake member and the second air intake member.

[0014] In a possible implementation, the welding fixture further includes a controller, and the plurality of pressure sensors and the plurality of flow sensors are electrically connected to the controller respectively.

[0015] In a possible embodiment, the clamping assembly further includes a guide member, one end of which is connected to the base, an end of which away from the base is disposed in the clamping cover, and a guide portion on the guide member faces an air outlet of the second air inlet member.

[0016] In a possible implementation manner, one end of the flow guide member away from the base is adjustably disposed in the compression cover.

[0017] In a possible implementation, the welding fixture further includes a first shielding plate and a second shielding plate, and the first shielding plate and the second shielding plate are respectively arranged at two ends of the substrate along the width direction.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the welding fixture of the present invention, the driving end of the driving member can drive multiple clamping components to rise and fall simultaneously through the base plate, and each clamping component corresponds to a workpiece. When the base plate descends, the clamping cover can abut against the workpiece and press the workpiece downward to eliminate the gap between different components in the workpiece. When the clamping cover presses the workpiece downward, the length of the elastic member is compressed and the elastic force changes. The pressure sensor detects the elastic force of the elastic member and obtains the clamping force of the clamping cover pressing the workpiece. The guide member can limit the deformation direction of the elastic member to ensure that the measurement result of the clamping force is accurate. The laser beam can act on the workpiece through the light inlet on the base plate and the light outlet on the clamping cover to perform laser welding on the workpiece.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of a welding fixture according to an embodiment of the present invention from a first viewing angle is shown;

[0023] Figure 2 A schematic diagram of the three-dimensional structure of a welding fixture according to an embodiment of the present invention from a second viewing angle is shown;

[0024] Figure 3 Shows Figure 2 The enlarged schematic diagram of point A in the middle;

[0025] Figure 4 A schematic diagram of the three-dimensional structure of a substrate according to an embodiment of the present invention is shown;

[0026] Figure 5 A schematic diagram of the three-dimensional structure of a pressing assembly according to an embodiment of the present invention is shown;

[0027] Figure 6 An exploded schematic diagram of a clamping assembly according to an embodiment of the present invention is shown;

[0028] Figure 7 A schematic diagram of the three-dimensional structure of a connecting piece according to an embodiment of the present invention is shown;

[0029] Figure 8 A cross-sectional schematic diagram of a clamping assembly according to an embodiment of the present invention is shown.

[0030] Description of main component symbols:

[0031] 100-welding fixture; 110-base plate; 111-light inlet; 120-driving member; 130-pressing assembly; 131-sealing cover; 132-base; 1321-through hole; 133-pressing cover; 1331-light outlet; 1332-bending portion; 1333-avoidance space; 134-pressure sensor; 135-elastic member; 136-guide member; 137-connecting member; 1371-connecting portion; 1372-first protrusion; 1373-adjusting portion; 1374-second protrusion; 138-flow guide member; 1381-flow guide portion; 140-mounting plate; 150-air suction duct; 151-air suction port; 160-first air inlet member; 161-second air inlet member; 162-flow sensor; 170-first baffle plate; 180-second baffle plate. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] Embodiment 1

[0038] See also Figures 1 to 3 An embodiment of the present application provides a welding fixture 100, which can clamp a workpiece when the workpiece is laser welded.

[0039] The workpiece in this embodiment is the components of the electric drive control unit in the new energy electric vehicle, mainly including silicon carbide power devices, capacitors, Hall copper bars and other components.

[0040] The welding fixture 100 includes a base plate 110, at least one driving member 120 and a plurality of clamping assemblies 130. Specifically, the welding fixture 100 includes two driving members 120 and two mounting plates 140 arranged opposite to each other, and the driving end of each driving member 120 is connected to a mounting plate 140. The mounting plate 140 is used to be mounted and fixed on an external structure (not shown in the figure) to facilitate the fixation of the welding fixture 100. The driving ends of the two driving members 120 can synchronously drive the base plate 110 to drive the base plate 110 to rise and fall. The descent of the base plate 110 can drive the clamping assembly 130 to press down the workpiece, thereby eliminating the gap between the components and the welding surface in the workpiece.

[0041] See also Figure 4 The substrate 110 has a plurality of light inlets 111 , through which the laser beam can act on the workpiece to perform laser welding on the workpiece.

[0042] A plurality of clamping assemblies 130 are connected to the side of the substrate 110 facing the workpiece. Specifically, the number of the clamping assemblies 130 is the same as the number of the light inlets 111, and each light inlet 111 is provided with a clamping assembly 130, so as to clamp the area near the laser welding part on the workpiece.

[0043] See also Figure 5 and Figure 6 The pressing assembly 130 includes a sealing cover 131, a base 132, a pressing cover 133, a pressure sensor 134, an elastic member 135 and a guide member 136. The sealing cover 131 is connected to the substrate 110, the base 132 is movably disposed in the sealing cover 131, and the pressing cover 133 is disposed on a side of the base 132 away from the sealing cover 131. The pressure sensor 134 is disposed between the sealing cover 131 and the base 132, one end of the elastic member 135 abuts against the pressure sensor 134, and the end of the elastic member 135 away from the pressure sensor 134 abuts against the base 132, and the guide member 136 is respectively penetrated through the sealing cover 131, the pressure sensor 134, the elastic member 135 and the base 132, and a light outlet 1331 corresponding to the light inlet 111 is opened on the pressing cover 133 (see Figure 3 ), the shape of the light outlet 1331 of the pressing cover 133 can be adjusted according to the type of workpiece.

[0044] When the welding fixture 100 of this embodiment is used for laser welding of workpieces, the mounting plate 140 is fixed at a position where laser welding is required, such as a laser welding table, a laser welding device, etc. The driving end of the driving member 120 is used to drive the substrate 110 to move, thereby driving multiple clamping assemblies 130 to rise and fall simultaneously. Each clamping assembly 130 corresponds to a workpiece. When the substrate 110 descends, the clamping cover 133 can be supported on the workpiece and press the workpiece down to eliminate the gap between the workpiece and the welding surface. When the clamping cover 133 presses the workpiece down, the length of the elastic member 135 is compressed, and the elastic force changes. The pressure sensor 134 detects the elastic force of the elastic member 135, and then obtains the clamping force of the clamping cover 133 to clamp the workpiece. The guide member 136 can limit the deformation direction of the elastic member 135 to ensure that the measurement result of the clamping force is accurate. The laser beam can act on the workpiece through the light inlet 111 on the substrate 110 and the light outlet 1331 on the clamping cover 133 respectively to perform laser welding on the workpiece.

[0045] In some embodiments, see Figure 5 and Figure 6 The guide member 136 can connect the sealing cover 131 and the substrate 110 , and prevent the base 132 from moving out of the sealing cover 131 .

[0046] Exemplarily, the guide member 136 is a bolt, the head of the bolt is arranged on the side of the substrate 110 away from the sealing cover 131, the rod of the bolt is respectively penetrated through the sealing cover 131, the pressure sensor 134, the elastic member 135 and the base 132, and the end of the bolt rod away from the head is threadedly connected to the base 132.

[0047] In some embodiments, each clamping assembly 130 includes a plurality of guide members 136 and a plurality of elastic members 135 , and the plurality of elastic members 135 are respectively and correspondingly sleeved outside the plurality of guide members 136 .

[0048] The clamping cover 133 can be pressed against the workpiece during the pressing process to change the elastic force of the elastic member 135. The pressure sensor 134 can detect the elastic force of the elastic member 135, thereby obtaining the pressure value of the clamping cover 133 on the workpiece, and then effectively judging and understanding whether the pressure of the clamping cover 133 on the workpiece can eliminate the gap between different components in the workpiece, and whether the pressure of the clamping cover 133 on the workpiece will damage the workpiece.

[0049] In some embodiments, each clamping assembly 130 includes multiple pressure sensors 134, and the multiple pressure sensors 134 respectively correspond to different areas of the base 132, so that when the base 132 drives the clamping cover 133 to be pressed downward, the multiple pressure sensors 134 can respectively detect the pressure of different areas of the clamping cover 133 on the workpiece.

[0050] See 6 and Figure 7The clamping assembly 130 further includes a connecting piece 137 , which can connect the base 132 and the clamping cover 133 .

[0051] In some embodiments, the connecting member 137 has a connecting portion 1371, a first protrusion 1372, an adjusting portion 1373, and a second protrusion 1374 in sequence along the axial direction. The connecting portion 1371 is detachably connected to the base 132. The adjusting portion 1373 is passed through the clamping cover 133. The second protrusion 1374 is arranged on the side of the clamping cover 133 away from the base 132. The outer diameter of the adjusting portion 1373 is smaller than the outer diameter of the first protrusion 1372 and the outer diameter of the second protrusion 1374.

[0052] The connecting portion 1371 is detachably connected to the base 132 so as to facilitate rapid replacement of the corresponding pressing cover 133 according to the type of workpiece.

[0053] Exemplarily, an external thread is provided on the outer surface of the connecting portion 1371, a connecting hole is opened on the base 132, an internal thread corresponding to the external thread is provided on the inner wall of the connecting hole, and the connecting portion 1371 is screwed and connected with the inner wall thread of the connecting hole.

[0054] The base 132 is disposed outside the adjusting portion 1373 , so as to prevent the connection between the connecting portion 1371 and the base 132 from loosening and causing the device to fall off during use.

[0055] Since the outer diameter of the first protrusion 1372 and the outer diameter of the second protrusion 1374 are both larger than the outer diameter of the adjustment portion 1373, even if the connection between the connecting portion 1371 of a connecting member 137 and the base 132 becomes loose, the connecting member 137 will not fall off directly, and it is also more convenient to replace the compression cover 133.

[0056] In some embodiments, please refer again to Figure 1 The welding fixture 100 also includes an air suction duct 150 , which has a plurality of air suction ports 151 . The plurality of air suction ports 151 are respectively disposed in the plurality of light inlets 111 , and the interior of the air suction ports 151 is connected to the light outlet 1331 .

[0057] The suction duct 150 can extract the smoke and spatter generated during the laser welding of each workpiece through multiple suction ports 151, thereby preventing the smoke and spatter from affecting the welding quality of the workpiece. The number of suction ports 151 of the suction duct 150 is set according to the number of clamping assemblies 130.

[0058] In some embodiments, the suction duct 150 is disposed on a side of the substrate 110 away from the pressing assembly 130 .

[0059] In some embodiments, the main body of the air suction duct 150 has two air suction ports, and both of the air suction ports can be connected to an external air suction device.

[0060] In some embodiments, the suction port 151 has a slope of 30°, and each suction port 151 is about 10-15 mm away from the welding surface of the workpiece. This is conducive to timely removal of smoke generated during welding, and will not affect the welding effect by sucking away the welding shielding gas due to excessive distance or suction force. This can ensure the welding quality and avoid the smoke in the welding process from being polluted by the product and affecting its performance requirements due to failure to be removed in time.

[0061] In some embodiments, please refer again to Figure 1 , Figure 5 and Figure 6 The welding fixture 100 also includes an air intake assembly, which includes a first air intake member 160 and multiple second air intake members 161. The air intake ends of the multiple second air intake members 161 are respectively connected to the air outlet ends of the first air intake member 160, and the air outlet ends of the second air intake members 161 are connected to the chamber in the base 132, and the chamber in the base 132 is connected to the light outlet 1331.

[0062] The air inlet end of the first air inlet member 160 can be connected to an external gas tank storing protective gas, and the protective gas in the gas tank can enter the chamber in each base 132 respectively through the first air inlet member 160 and multiple second air inlet members 161, so as to blow away smoke and dust when laser welding the workpiece to ensure the welding quality.

[0063] In some embodiments, the first air inlet member 160 is disposed on a side of the substrate 110 away from the pressing assembly 130 , and an air outlet end of the second air inlet member 161 is disposed through the base 132 .

[0064] In some embodiments, the vertical distance from the suction port 151 to the light outlet 1331 is 10-15 mm. This not only can timely remove the smoke and splashes generated during laser welding, but also will not draw away the protective gas due to excessive suction, thereby achieving both the welding quality effect and the timely removal of impurities that pollute the workpiece performance.

[0065] In some embodiments, the air intake assembly further includes a plurality of flow sensors 162, and the flow sensors 162 are disposed between the first air intake member 160 and the second air intake member 161. The flow sensors 162 can detect the gas flow between the first air intake member 160 and the second air intake member 161.

[0066] In some embodiments, see Figure 1 and Figure 2The air intake assembly includes a plurality of flow sensors 162 arranged side by side, and each flow sensor 162 corresponds to a second air intake member 161 to monitor the flow size of the protective gas.

[0067] In some embodiments, a plurality of quick-connect connectors are provided on the first air inlet member 160, and the quick-connect connectors can be connected to the air inlet of the corresponding flow sensor 162, so as to adjust and control the protective gas flow size and value required for the laser welding process of each independent clamping assembly 130 separately according to the process requirements, so as to facilitate recording, archiving and backup and ensure the quality requirements of the welding process.

[0068] See also Figure 6 and Figure 8 The compression assembly 130 further includes a flow guide 138, on which a flow guide portion 1381 is disposed. One end of the flow guide 138 is connected to the base 132, the flow guide portion 1381 is disposed in the compression cover 133, and a flow guide channel is formed between the flow guide portion 1381 and a side wall of the compression cover 133.

[0069] At the same time, a through hole 1321 is provided on the outer surface of the base 132. One end of the through hole 1321 is connected to the second air inlet 161, and the other end of the through hole 1321 is connected to the chamber in the base 132. The guide part 1381 located in the base 132 covers the through hole 1321, and there is a gap between the opening section of the guide part 1381 and the through hole 1321, so that the guide channel and the through hole 1321 are connected.

[0070] Furthermore, one end of the guide member 138 away from the base 132 is adjustably disposed in the compression cover 133, so that the position of the guide portion 1381 in the compression cover 133 can be adjusted according to the type and size of the workpiece to change the size of the guide channel.

[0071] In some embodiments, the guide 138 can guide the shielding gas to the weld surface to protect and cool the weld, avoid oxidation during welding, and better ensure the protective effect of the shielding gas. Specifically, the distance from the guide 1381 to the inner wall of the compression cover 133 is between 0.5-2 mm, and the distance from the end of the guide 1381 provided at the compression cover 133 to the weld surface of the workpiece is between 2-3 mm, thereby ensuring that the flow of the shielding gas is moderate, and protecting the weld from oxidation and cooling the weld.

[0072] The shielding gas entering from the second air inlet 161 is gradually guided to a distance closer to the surface of the workpiece weld through the through hole 1321 and the guide channel. By setting the guide portion 1381, the air duct with a circular cross section is changed to an air duct with a square cross section; and the length of the air duct with a square cross section is adapted to the length of the opening cross section of the pressing cover 133, so that the workpiece pressed by the pressing cover 133 can be evenly blown to ensure the uniformity of gas flow.

[0073] A bending portion 1332 is also provided on a side wall of the clamping cover 133. The side wall where the bending portion 1332 is located and the side wall where the guide portion 1381 is located are on opposite sides. The bending portion 1332 also forms an escape space 1333 in the clamping cover 133. The escape space 1333 is separated from the processing range of the laser beam in the clamping cover 133. The end of the suction port 151 is located in the escape space 1333, and the vertical distance from the port of the suction port 151 to the light outlet 1331 is 10-15mm. In this way, not only can the smoke and splashes generated during the laser welding process be removed in time, but the protective gas will not be drawn away due to excessive suction, thereby achieving both the goal of ensuring the welding quality effect and the timely removal of impurities that pollute the performance of the workpiece.

[0074] In some embodiments, see Figure 1 and Figure 2 The welding fixture 100 further includes a first shielding plate 170 and a second shielding plate 180 , and the first shielding plate 170 and the second shielding plate 180 are respectively disposed at both ends of the substrate 110 along the width direction.

[0075] The first shielding plate 170 and the second shielding plate 180 can shield and cover the workpiece, thereby preventing dust from falling into the workpiece.

[0076] Exemplarily, the first shielding plate 170 and the second shielding plate 180 are respectively disposed at two ends of the base plate 110 along the width direction by means of bolt fixing.

[0077] In some embodiments, the working process of the welding fixture 100 is as follows: the driving end of the driving member 120 descends to the working distance, and drives the multiple clamping assemblies 130 to descend simultaneously through the base 110, so that each clamping assembly 130 respectively clamps the corresponding workpiece to eliminate the gap between different components in the workpiece. When the clamping cover 133 applies pressure to the workpiece, one end of the elastic member 135 is fixed by the guide member 136 and acts on the base 132, and the other end acts on the pressure sensor 134. The pressure sensor 134 measures the elastic force of the elastic member 135 to obtain the clamping force of the clamping cover 133 on the workpiece. The laser beam welds the part of the workpiece that needs to be welded through the light inlet 111, and the flow sensor 162 can control the protective gas to flow from the first air inlet 160 into the second air inlet 161, so that the protective gas in the second air inlet 161 flows into the base 132, thereby performing welding protection and cooling on the weld on the workpiece. The suction duct 150 can timely extract the smoke and splashes generated in each clamping assembly 130 to improve the welding quality of the workpiece.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0079] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A welding fixture, characterized in that: include: A substrate having a plurality of light inlets; at least one driving member, wherein a driving end of the driving member is connected to the substrate; A plurality of clamping components, the clamping components comprising a sealing cover, a base, a clamping cover, a pressure sensor, an elastic member and a guide member, the sealing cover being connected to the substrate, the base being movably disposed in the sealing cover, the clamping cover being disposed on a side of the base away from the sealing cover, the pressure sensor being disposed between the sealing cover and the base, one end of the elastic member being abutted against the pressure sensor, and one end of the elastic member being away from the pressure sensor being abutted against the base, the guide member being respectively disposed through the sealing cover, the pressure sensor, the elastic member and the base, and a light outlet corresponding to the light inlet being provided on the clamping cover.

2. The welding fixture according to claim 1, characterized in that: The clamping assembly also includes a connecting member, which has a connecting portion, a first protruding portion, an adjusting portion, and a second protruding portion in sequence along the axial direction. The connecting portion is detachably connected to the base, the adjusting portion is passed through the clamping cover, and the second protruding portion is arranged on a side of the clamping cover away from the base. The outer diameter of the adjusting portion is smaller than the outer diameter of the first protruding portion and the outer diameter of the second protruding portion.

3. The welding fixture according to claim 1, characterized in that: The welding fixture also includes an air suction duct, which has a plurality of air suction ports. The plurality of air suction ports are respectively arranged in the plurality of light inlets, and the interior of the air suction port is connected to the light outlet.

4. The welding fixture according to claim 3, characterized in that: The vertical distance from the air suction port to the light outlet is 10-15 mm.

5. The welding fixture according to claim 1, characterized in that: The welding fixture also includes an air intake assembly, which includes a first air intake member and a plurality of second air intake members, wherein the air intake ends of the plurality of second air intake members are respectively connected to the air outlet ends of the first air intake member, the air outlet ends of the second air intake members are connected to the chamber in the base, and the chamber in the base is connected to the light outlet.

6. The welding fixture according to claim 5, characterized in that: The air intake assembly further includes a plurality of flow sensors, and the flow sensors are arranged between the first air intake member and the second air intake member.

7. The welding fixture according to claim 5, characterized in that: The clamping assembly also includes a guide member, one end of which is connected to the base, and one end of which is away from the base is arranged in the clamping cover, and the guide portion on the guide member faces the air outlet of the second air inlet member.

8. The welding fixture according to claim 7, characterized in that: One end of the flow guide away from the base is adjustably arranged in the compression cover.

9. The welding fixture according to claim 1, characterized in that: The welding fixture further includes a first shielding plate and a second shielding plate, wherein the first shielding plate and the second shielding plate are respectively arranged at two ends of the substrate along the width direction.

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