Laser welding gun safe to use

Abstract

The utility model relates to a laser welding gun safe to use. The laser welding gun comprises a welding gun body part, a welding head part and a welding nozzle. The welding gun body part is provided with a laser switch button and a safety switch button, and the laser switch button and the safety switch button are electrically connected in series so as to trigger starting of laser when being pressed at the same time. The welding head part is connected to the welding gun main body part, can slide up and down for a preset distance relative to the welding gun main body part and is provided with an upper limit position and a lower limit position, the welding head part presses the safety switch button at the upper limit position and does not make contact with the safety switch button at the lower limit position, and an elastic piece is arranged between the welding head part and the welding gun main body part; and the welding head part automatically resets to the lower limit position under the action of the elastic piece. The welding nozzle is arranged at the laser outlet end of the welding head part. The laser can be started only when it is ensured that the laser welding gun is located at the working position, and therefore using safety is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of laser welding, and in particular to a laser welding gun that is safe to use. Background Art

[0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Laser welding machines are usually equipped with a handheld laser welding gun. The handheld laser welding gun mainly includes a welding gun body and a welding head. The laser beam enters the welding head after being adjusted by the welding gun body, and then is emitted from the welding nozzle through the internal channel of the welding head. The welding gun body serves as the holding part, and the welding head serves as the protective part to protect the laser beam, and the welding nozzle is separated from the holding part by a safe distance through the welding head. In order to facilitate the control of the start and stop of the laser, a laser switch button is set on the welding gun body. It is easy to press the laser switch button by mistake during use, causing the laser welding gun to emit laser when it should not be working, posing a safety hazard. Utility Model Content

[0003] Based on this, the present application provides a laser welding gun that is safe to use, which can start the laser only when the laser welding gun is in a working position, thereby ensuring safe use.

[0004] To achieve the above purpose, the technical solution adopted in this application is as follows:

[0005] A laser welding gun that is safe to use comprises: a welding gun body, provided with a laser switch button and a safety switch button, wherein the laser switch button and the safety switch button are electrically connected in series to trigger the turning on of the laser when pressed at the same time; a welding head, connected to the welding gun body and capable of sliding up and down a predetermined distance relative to the welding gun body and having an upper limit position and a lower limit position, wherein the welding head presses the safety switch button when at the upper limit position and does not contact the safety switch button when at the lower limit position; an elastic member is provided between the welding head and the welding gun body, wherein the welding head automatically resets to the lower limit position under the action of the elastic member; and a welding nozzle, arranged at the laser outlet end of the welding head.

[0006] Furthermore, the welding gun main body includes a connecting piece 1 arranged at its laser outlet end, and the welding head includes a connecting piece 2 arranged at its laser inlet end. A plurality of limit screws are distributed on the connecting piece 2, and the limit screws are slid up and down through the connecting piece 2 and are threadedly fixed to the connecting piece 1, so that the welding head can slide up and down a predetermined distance relative to the welding gun main body.

[0007] Furthermore, the elastic member includes a plurality of spring plungers, and the spring plungers are threadedly fixed to the second connecting member and elastically pressed against the first connecting member.

[0008] Furthermore, the safety switch button is arranged on one side of the connecting member 1, and a pressing column is provided on one side of the connecting member 2, and the safety switch button corresponds to the pressing column up and down.

[0009] Furthermore, the welding head portion includes a light guide tube, the upper end of the light guide tube is connected to the second connecting piece, and the lower end is connected to the welding nozzle.

[0010] Furthermore, it also includes an air blowing component, which includes an air guide channel, an air guide pipe, an annular air outlet and a guide ring plate, the air guide channel is arranged on the main body of the welding gun, the annular air outlet is arranged on the hole wall of the light guide hole of the connecting piece 2 or the light guide pipe, the air guide pipe is used to connect the air guide channel and the annular air outlet, the guide ring plate is used to separate the annular air outlet from the light guide hole of the connecting piece 2 or the light guide pipe, and a plurality of air outlet holes are evenly spaced on the guide ring plate, and the annular air outlet is connected to the light guide hole of the connecting piece 2 or the light guide pipe through the plurality of air outlet holes on the guide ring plate.

[0011] Furthermore, the light guide tube comprises an outer tube and an inner tube which are coaxially arranged, the inner tube is threadedly connected to the outer tube so that the length extending out of the outer tube can be adjusted, and the outer wall of the inner tube is marked with scales along the axial direction.

[0012] Furthermore, a laser channel and a lens assembly installed in the laser channel are provided in the welding gun body, and the lens assembly is used to adjust the laser beam entering the laser channel and reflect the laser beam so that the laser beam is emitted along the light guide hole in the welding head.

[0013] Furthermore, the lens assembly includes a collimating mirror, a focusing mirror, an X-axis reflector and a Y-axis reflector, the X-axis reflector is connected to an X-axis motor, the Y-axis reflector is connected to a Y-axis motor, and the laser beam entering the laser channel first passes through the collimating mirror and then irradiates the X-axis reflector, and then is reflected by the X-axis reflector to the Y-axis reflector, and then is reflected by the Y-axis reflector to the focusing mirror, and finally passes through the focusing mirror and is shot into the light guide hole of the welding head.

[0014] Furthermore, a protective lens is provided in the welding gun body, and the protective lens is arranged at the laser outlet of the laser channel.

[0015] The laser welding gun of the present application is safe to use. The laser switch button and the safety switch button on the welding gun body are electrically connected in series to trigger the turning on of the laser when they are pressed at the same time. The welding head can slide up and down a predetermined distance relative to the welding gun body and has an upper limit position and a lower limit position. The welding head presses the safety switch button when it is at the upper limit position and does not contact the safety switch button when it is at the lower limit position. The welding head automatically resets to the lower limit position under the action of the elastic member. Therefore, when the welding nozzle does not contact the welding workpiece, the welding head is at the lower limit position without pressing the safety switch button. At this time, even if the laser switch button is accidentally touched, the laser will not be turned on. Only when the welding nozzle contacts the welding workpiece, the welding head approaches the welding gun body and presses the safety switch button. At this time, pressing the laser switch button will turn on the laser. Therefore, the laser can be started only when the laser welding gun is in the working position, thereby ensuring safe use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application 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 only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic structural diagram of a safe laser welding gun according to an embodiment of the present application.

[0018] Figure 2 This is a schematic diagram of the structures inside the welding gun body and welding head of a safe-to-use laser welding gun according to an embodiment of the present application.

[0019] Figure 3 It is a schematic structural diagram of an air blowing assembly in a safe laser welding gun according to an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 10. Welding gun body; 11. Laser switch button; 12. Safety switch button; 13. Laser channel; 141. Collimating mirror; 142. Focusing mirror; 143. X-axis reflector; 144. Y-axis reflector; 151. X-axis motor; 152. Y-axis motor; 16. Protective lens; 17. Connector 1; 20. Welding head; 21. Connector 2; 211. Pressing column; 22. Light guide tube; 221. Outer tube; 222. Inner tube; 30. Welding nozzle; 40. Limiting screw; 50. Spring plunger; 61. Air guide channel; 62. Air guide tube; 63. Annular air outlet; 64. Guide ring plate; 641. Air outlet. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below with reference to the accompanying drawings. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] In the description of the present application, it should 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] 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 at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In this application, 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In the present application, 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”, and “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”, and “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.

[0027] refer to Figure 1 The present application provides a laser welding gun that is safe to use, including a welding gun body 10, a welding head 20 and a welding nozzle 30. The welding gun body 10 is provided with a laser switch button 11 and a safety switch button 12, and the laser switch button 11 and the safety switch button 12 are electrically connected in series to trigger the opening of the laser when they are pressed at the same time. The welding head 20 is connected to the welding gun body 10, and can slide up and down a predetermined distance relative to the welding gun body 10 and has an upper limit position and a lower limit position. The welding head 20 presses the safety switch button 12 when it is in the upper limit position and does not contact the safety switch button 12 when it is in the lower limit position. An elastic member is provided between the welding head 20 and the welding gun body 10, and the welding head 20 automatically resets to the lower limit position under the action of the elastic member. The welding nozzle 30 is arranged at the laser outlet end of the welding head 20.

[0028] The laser welding gun of the present application is safe to use. The laser switch button 11 and the safety switch button 12 on the welding gun body 10 are electrically connected in series to trigger the opening of the laser when they are pressed at the same time. The welding head 20 can slide up and down a predetermined distance relative to the welding gun body 10 and has an upper limit position and a lower limit position. The welding head 20 presses the safety switch button 12 when it is at the upper limit position and does not contact the safety switch button 12 when it is at the lower limit position. The welding head 20 automatically resets to the lower limit position under the action of the elastic member. Therefore, when the welding nozzle 30 does not contact the welding workpiece, the welding head 20 is at the lower limit position without pressing the safety switch button 12. At this time, even if the laser switch button 11 is accidentally touched, the laser will not be turned on. Only when the welding nozzle 30 contacts the welding workpiece, the welding head 20 approaches the welding gun body 10 and presses the safety switch button 12. At this time, pressing the laser switch button 11 will turn on the laser. Therefore, the laser can be started only when the laser welding gun is in the working position, thereby ensuring safety in use.

[0029] In one embodiment, a laser channel 13 and a lens assembly installed in the laser channel 13 are provided in the welding gun body 10. The lens assembly is used to adjust the laser beam entering the laser channel 13 and reflect the laser beam so that the laser beam is emitted along the light guide hole in the welding head 20.

[0030] refer to Figure 2 Specifically, the lens assembly includes a collimator 141, a focusing mirror 142, an X-axis reflector 143, and a Y-axis reflector 144. The X-axis reflector 143 is connected to an X-axis motor 151, and the Y-axis reflector 144 is connected to a Y-axis motor 152. The laser beam entering the laser channel 13 first passes through the collimator 141 and then irradiates the X-axis reflector 143, and then is reflected by the X-axis reflector 143 to the Y-axis reflector 144, and then is reflected by the Y-axis reflector 144 to the focusing mirror 142, and finally passes through the focusing mirror 142 and is emitted into the light guide hole of the welding head 20. It can be understood that one, two, or more collimators 141 can be set according to actual needs, and there is no specific limitation.

[0031] Specifically, a protective lens 16 is provided in the welding gun body 10, and the protective lens 16 is provided at the laser outlet of the laser channel 13. The protective lens 16 is used to prevent dust from contaminating the lens assembly.

[0032] In one embodiment, reference Figure 1 The welding gun body 10 includes a connector 17 disposed at its laser outlet end, and the welding head 20 includes a connector 21 disposed at its laser inlet end. A plurality of limit screws 40 are distributed on the connector 21. The limit screws 40 slide up and down through the connector 21 and are threadedly fixed to the connector 17, so that the welding head 20 can slide up and down a predetermined distance relative to the welding gun body 10.

[0033] Further, the elastic member includes a plurality of spring plungers 50, which are threadedly fixed on the second connector 21 and elastically pressed against the first connector 17. It can be understood that the spring plunger 50 can also be threadedly fixed on the first connector 17 and elastically pressed against the second connector 21.

[0034] The safety switch button 12 is arranged on one side of the connecting member 17, and a pressing column 211 is arranged on one side of the connecting member 21. The safety switch button 12 corresponds to the pressing column 211 up and down. The pressing column 211 presses the safety switch button 12.

[0035] The welding head 20 includes a light guide tube 22, the upper end of the light guide tube 22 is connected to the connecting piece 21, and the lower end is connected to the welding nozzle 30. The light guide tube 22 can be a single tube with a fixed length, or a component with an adjustable length. Figure 2 When the light guide tube 22 is a component with adjustable length, it can be set that the light guide tube 22 includes an outer tube 221 and an inner tube 222 arranged coaxially, the inner tube 222 is threadedly connected to the outer tube 221 and can adjust the length extending from the outer tube 221, and the outer wall of the inner tube 222 is marked with scales along the axial direction.

[0036] In one embodiment, the safe laser welding gun of the present application further comprises an air blowing component, Figure 3 The air blowing assembly includes an air guide channel 61, an air guide pipe 62, an annular air outlet 63 and a guide ring plate 64. The air guide channel 61 is arranged on the welding gun body 10, and the annular air outlet 63 is arranged on the hole wall of the light guide hole of the connecting piece 21 or the light guide pipe 22. The air guide pipe 62 is used to connect the air guide channel 61 and the annular air outlet 63. The guide ring plate 64 is used to separate the annular air outlet 63 from the light guide hole of the connecting piece 21 or the light guide pipe 22. A plurality of air outlet holes 641 are evenly spaced on the guide ring plate 64. The annular air outlet 63 is connected to the light guide hole of the connecting piece 21 or the light guide pipe 22 through the plurality of air outlet holes 641 on the guide ring plate 64.

[0037] By blowing air into the air guide channel 61, the gas enters the air guide pipe 62 along the air guide channel 61, then enters the annular air outlet 63 along the air guide pipe 62, and is then ejected from the air outlet hole 641 on the guide ring plate 64. In this way, an air curtain can be formed in the light guide hole of the connecting member 21 or the light guide pipe 22 to separate the smoke and dust, thereby preventing the smoke and dust from entering the welding gun body 10.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-described embodiments only express several implementation methods of the present application and should not be construed as limiting the scope of the patent application. It should be noted that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be subject to the attached claims.

Claims

1. A laser welding gun that is safe to use, characterized in that: include: The welding gun body is provided with a laser switch button and a safety switch button, wherein the laser switch button and the safety switch button are electrically connected in series to trigger the laser to be turned on when they are pressed at the same time; A welding head connected to the welding gun body and capable of sliding up and down a predetermined distance relative to the welding gun body to have an upper limit position and a lower limit position, wherein the welding head presses the safety switch button when in the upper limit position and does not contact the safety switch button when in the lower limit position; An elastic member is provided between the welding head and the welding gun body, and the welding head is automatically reset to the lower limit position under the action of the elastic member; The welding nozzle is arranged at the laser outlet end of the welding head.

2. The safe-to-use laser welding gun according to claim 1, characterized in that: The welding gun main body includes a connecting piece 1 arranged at its laser outlet end, and the welding head includes a connecting piece 2 arranged at its laser inlet end. A plurality of limit screws are distributed on the connecting piece 2. The limit screws slide up and down and pass through the connecting piece 2 and are threadedly fixed to the connecting piece 1, so that the welding head can slide up and down a predetermined distance relative to the welding gun main body.

3. The safe-to-use laser welding gun according to claim 2, characterized in that: The elastic member includes a plurality of spring plungers, and the spring plungers are threadedly fixed to the second connecting member and elastically pressed against the first connecting member.

4. The safe-to-use laser welding gun according to claim 2 or 3, characterized in that: The safety switch button is arranged on one side of the connecting member 1, and a pressing column is arranged on one side of the connecting member 2, and the safety switch button corresponds to the pressing column up and down.

5. The safe-to-use laser welding gun according to claim 2, characterized in that: The welding head portion comprises a light guide tube, the upper end of the light guide tube is connected to the second connecting member, and the lower end of the light guide tube is connected to the welding nozzle.

6. The safe-to-use laser welding gun according to claim 5, characterized in that: It also includes an air blowing component, which includes an air guide channel, an air guide pipe, an annular air outlet and a guide ring plate. The air guide channel is arranged on the main body of the welding gun, and the annular air outlet is arranged on the hole wall of the light guide hole of the connecting piece 2 or the light guide pipe. The air guide pipe is used to connect the air guide channel and the annular air outlet. The guide ring plate is used to separate the annular air outlet from the light guide hole of the connecting piece 2 or the light guide pipe. A plurality of air outlet holes are evenly spaced on the guide ring plate, and the annular air outlet is connected with the light guide hole of the connecting piece 2 or the light guide pipe through the plurality of air outlet holes on the guide ring plate.

7. The safe-to-use laser welding gun according to claim 5, characterized in that: The light guide tube comprises an outer tube and an inner tube which are coaxially arranged. The inner tube is threadedly connected to the outer tube so that the length extending out of the outer tube can be adjusted. The outer wall of the inner tube is marked with scales along the axial direction.

8. The safe-to-use laser welding gun according to claim 1, characterized in that: The welding gun body is provided with a laser channel and a lens assembly installed in the laser channel. The lens assembly is used to adjust the laser beam entering the laser channel and reflect the laser beam so that the laser beam is emitted along the light guide hole in the welding head.

9. The safe-to-use laser welding gun according to claim 8, characterized in that: The lens assembly includes a collimating mirror, a focusing mirror, an X-axis reflector and a Y-axis reflector. The X-axis reflector is connected to an X-axis motor, and the Y-axis reflector is connected to a Y-axis motor. The laser beam entering the laser channel first passes through the collimating mirror and then irradiates the X-axis reflector, and then is reflected by the X-axis reflector to the Y-axis reflector, and then is reflected by the Y-axis reflector to the focusing mirror, and finally passes through the focusing mirror and is shot into the light guide hole of the welding head.

10. The safe-to-use laser welding gun according to claim 8, characterized in that: A protective lens is also provided in the welding gun body, and the protective lens is arranged at the laser outlet of the laser channel.

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