Argon arc welding device for metal sheath cable

Abstract

The invention discloses a metal sheath cable argon arc welding device, which comprises a pay-off rack, a belt pay-off rack, a welding machine, a crawler-type traction machine and a take-up rack, and is characterized in that the welding machine comprises a longitudinal wrapping forming assembly and a welding gun, the longitudinal wrapping forming assembly is used for allowing a metal sheath to pass through and be formed, and the welding gun is used for welding the metal sheath wrapping a wire core into a tubular shape; the welding machine is further provided with a controller, a welding gun adjusting mechanism and a camera used for grabbing the gap position of the metal sheath formed in a longitudinal wrapping mode. The welding gun is installed on the welding machine through the welding gun adjusting mechanism so that a nozzle of the welding gun can rotate in the circumferential direction around the tubular metal sheath through the welding gun adjusting mechanism, and the nozzle of the welding gun can be adjusted to face the gap position of the longitudinally-wrapped metal sheath. According to the invention, automatic following of the direction of the nozzle of the welding gun and the gap position of the metal sheath can be realized, so that intelligent real-time adjustment of the nozzle of the welding gun is realized, the welding quality is ensured, and the wrapping performance of the metal sheath is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of automated processing and forming equipment, and in particular to an argon arc welding device for a metal sheathed cable. Background Art

[0002] In order to enhance the protection capability of the cable, a metal sheath can be wrapped around the outer periphery of the wire core, the metal sheath can be made into a tubular shape by longitudinal wrapping, and the gaps in the metal sheath can be welded by argon arc welding or other methods to ensure the wrapping performance of the metal sheath.

[0003] Although the existing welded metal sheathed cable is pulled by a crawler traction machine, the longitudinally wrapped metal sheathed cable may be deflected under the action of the wire take-up frame, so that when the gap of the metal sheath is welded with a welding gun, the nozzle direction of the welding gun may not be aligned with the gap of the longitudinally wrapped metal sheath. This deviation leads to poor gap welding effect and affects the wrapping performance of the metal sheath. Summary of the Invention

[0004] In view of the above shortcomings, the present invention provides a metal sheathed cable argon arc welding device, which can solve the problem of poor welding effect caused by misalignment between the nozzle of the welding gun and the gap due to deflection of the metal sheathed cable.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A metal sheathed cable argon arc welding device, a wire pay-off stand, a tape pay-off stand, a welding machine, a crawler-type traction machine and a wire take-up stand. The welding machine includes a longitudinally wrapped forming assembly for allowing the metal sheath to pass through and form, and a welding gun for welding the metal sheath covering the wire core into a tubular shape. The welding machine is also provided with a controller, a welding gun adjustment mechanism and a camera for grasping the gap position of the longitudinally wrapped metal sheath. The welding gun is installed on the welding machine via the welding gun adjustment mechanism so that the welding gun nozzle can be rotated circumferentially around the tubular metal sheath by the welding gun adjustment mechanism to adjust the welding gun nozzle toward the gap position of the longitudinally wrapped metal sheath.

[0007] Furthermore, the welding gun adjustment mechanism includes a steering gear, the extension direction of the output shaft of the steering gear is consistent with the extension direction of the tubular metal sheath, and the welding gun is installed at the end of the output shaft of the steering gear.

[0008] Furthermore, the welding gun adjustment mechanism includes a mounting platform and a three-axis motion mechanism that drives the mounting platform to extend along the X-axis, the Y-axis, and the Z-axis.

[0009] Furthermore, the longitudinal wrapping and forming assembly includes an edge trimming mechanism, a rounding mechanism, a longitudinal wrapping and arc forming mechanism, and a longitudinal wrapping and forming mechanism, which are arranged in sequence.

[0010] Furthermore, a wire core guiding mechanism is provided in front of the longitudinal wrapping and arc forming mechanism for guiding the wire core into the longitudinal wrapping and arc forming mechanism.

[0011] Furthermore, a side detection mechanism is provided on the front side of the longitudinal arc-forming mechanism, and the side detection mechanism is used to detect the side position of the metal sheath longitudinally wrapped into an arc shape by the longitudinal arc-forming mechanism. The side detection mechanism is electrically connected to the controller, so that when the side detection mechanism detects that the metal sheath longitudinally wrapped into an arc shape is deflected to one side, the controller controls the welding gun adjustment mechanism to adjust the welding gun to the deflected side so that the nozzle of the welding gun is directed toward the gap position of the longitudinally wrapped metal sheath.

[0012] Furthermore, the side detection mechanism includes a mounting frame, a spring sheet and a strain gauge, the spring sheet is installed on the mounting frame, the strain gauge is installed in the middle of the spring sheet, the strain gauge is electrically connected to the controller, and the end of the spring sheet is abutted against the side of the metal sheath longitudinally wrapped in an arc shape.

[0013] Furthermore, there are two spring pieces, and the ends of the two spring pieces are respectively in contact with two side edges of the metal sheath which is longitudinally wrapped in an arc shape.

[0014] Furthermore, a roller is provided at the end of the spring sheet, and the spring sheet abuts against the side of the metal sheath which is longitudinally wrapped in an arc shape through the roller.

[0015] Furthermore, the welding machine is also provided with a trimming machine for trimming both sides of the metal sheath when it is in a strip structure.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the metal sheathed cable argon arc welding device of the present invention uses a camera to take real-time pictures to capture and identify the gap position of the longitudinally wrapped metal sheath in real time, and transmits the signal to the controller. When the controller determines through the information identified by the camera that the nozzle direction of the welding gun is inconsistent with the gap position of the metal sheath, the controller controls the welding gun adjustment mechanism to allow the nozzle of the welding gun to rotate circumferentially around the tubular metal sheath to adjust the nozzle of the welding gun to the gap position of the longitudinally wrapped metal sheath, so that the nozzle direction of the welding gun follows the gap position of the metal sheath well, and can realize automatic following of the nozzle direction of the welding gun and the gap position of the metal sheath, so as to realize an intelligent real-time adjustment of the nozzle of the welding gun to ensure the welding quality and the wrapping performance of the metal sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments.

[0018] Figure 1 It is a structural schematic diagram of the argon arc welding device for metal sheathed cables of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the main components of the welding machine of the present invention;

[0020] Figure 3 Schematic diagram of the structure of the edge trimming mechanism of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the circle-pressing mechanism of the present invention;

[0022] Figure 5 Schematic diagram of the structure of the longitudinal arc forming mechanism in the present invention;

[0023] Figure 6 Schematic diagram of the structure of the wire core guiding mechanism of the present invention;

[0024] Figure 7 It is a structural schematic diagram of the welding gun, camera, welding gun adjustment mechanism and longitudinal package forming mechanism in the present invention;

[0025] Figure 8 It is a structural schematic diagram of the side detection mechanism in the present invention.

[0026] Among them, the marks shown in the figure are: 10-pay-off stand; 20-tape pay-off stand; 30-welding machine; 31-welding gun; 32-camera; 33-wire core guide mechanism; 331-wire core guide mechanism mounting frame; 332-wire core guide mechanism guide wheel; 34-edge trimmer; 35-height adjustment mechanism; 36-leveling mechanism; 40-crawler traction machine; 50-take-up stand; 60-longitudinal package forming assembly; 61-edge trimming mechanism; 611-edge trimming mechanism mounting frame; 612-upper edge trimming mechanism roller; 613-lower edge trimming mechanism roller; 62-rounding mechanism; 6 21- mounting frame for pressing mechanism; 622- upper roller for pressing mechanism; 623- roller for lower pressing mechanism; 63- longitudinal arc-forming mechanism; 631- mounting frame for longitudinal arc-forming mechanism; 632- mounting frame for longitudinal arc-forming mechanism; 64- longitudinal arc-forming mechanism; 641- mounting frame for longitudinal arc-forming mechanism; 642- sleeve for longitudinal arc-forming mechanism; 70- welding gun adjustment mechanism; 71- three-axis motion mechanism; 72- mounting platform; 73- servo; 80- corrugating machine; 90- side detection mechanism; 91- mounting frame; 92- spring piece; 93- strain gauge; 94- roller. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Please refer to Figures 1 to 8 The preferred embodiment of the present invention provides a metal sheathed cable argon arc welding device, which mainly includes a pay-off stand 10, a tape pay-off stand 20, a welding machine 30, a crawler-type tractor 40, and a take-up stand 50. The pay-off stand 10 is used to pay out the wire core; the tape pay-off stand is used to pay out the metal sheath, which is in the form of a strip; the welding machine 30 is used to longitudinally wrap the metal sheath and weld the metal sheath covering the wire core into a tubular shape to form a metal sheathed cable; the crawler-type tractor 40 is used to pull the welded cable toward the take-up stand 50; and the take-up stand 50 is used to wind and collect the welded cable. In the preferred embodiment, the pay-off stand 10, the tape pay-off stand 20, the welding machine 30, the crawler-type tractor 40, and the take-up stand 50 are provided with a corrugator 80 between the welding machine 30 and the crawler-type tractor 40. The corrugator 80 is used to compact the welded cable.

[0031] The welding machine 30 includes a longitudinal wrapping forming component 60 for allowing the metal sheath to pass through and shape, and a welding gun 31 for welding the metal sheath covering the wire core into a tubular shape. The metal sheath is longitudinally wrapped and formed by the longitudinal wrapping forming component 60, and then the wire core is allowed to enter and is welded into a tubular cable by the welding gun 31.

[0032] The welding machine 30 is also equipped with a controller, a welding gun adjustment mechanism 70, and a camera 32 for detecting the position of the gap in the longitudinally wrapped metal sheath. The controller, welding gun adjustment mechanism 70, and camera 32 are electrically connected. The camera 32 detects and identifies the position of the gap in the longitudinally wrapped metal sheath and transmits the signal to the controller, which can be an industrial computer, a programmable logic controller, or the like. The welding gun 31 is mounted on the welding machine 30 via the welding gun adjustment mechanism 70. When the controller determines, based on information identified by the camera 32, that the nozzle orientation of the welding gun 31 is inconsistent with the position of the gap in the metal sheath, the controller controls the welding gun adjustment mechanism 70 to rotate the nozzle of the welding gun 31 circumferentially around the tubular metal sheath to adjust the nozzle orientation of the welding gun 31 toward the gap in the longitudinally wrapped metal sheath.

[0033] In practice, for an ideal working mode, the cable is pulled by the crawler tractor 40 and wound and collected by the take-up frame 50. Before welding, the gap of the longitudinally wrapped metal sheath is located directly above. However, under the pulling action of the crawler tractor 40 and the take-up frame 50, the longitudinally wrapped metal sheathed cable may deflect (rotate circumferentially). Although the deflection amplitude is generally not large, the nozzle of the welding gun is misaligned with the gap of the longitudinally wrapped metal sheath, resulting in poor weld formation, poor gap welding effect, and poor wrapping performance of the metal sheath. At this time, the metal sheathed cable argon arc welding device of the present invention uses the camera 32 to take real-time pictures to capture and identify the gap position of the longitudinally wrapped metal sheath in real time, and transmits the signal to the controller. When the controller determines that the nozzle direction of the welding gun 31 is inconsistent with the gap position of the metal sheath through the information identified by the camera 32, the controller controls the welding gun adjustment mechanism 70 to rotate the nozzle of the welding gun 31 around the tubular metal sheath to adjust the nozzle direction of the welding gun 31 to the gap position of the longitudinally wrapped metal sheath, so that the nozzle direction of the welding gun 31 can well follow the gap position of the metal sheath. The present invention can realize the automatic following of the nozzle direction of the welding gun 31 and the gap position of the metal sheath, so as to realize an intelligent real-time adjustment of the nozzle of the welding gun 31, so as to ensure the welding quality and the wrapping performance of the metal sheath.

[0034] In a preferred embodiment, the welding gun adjustment mechanism 70 includes a servo 73, and the extension direction of the output shaft of the servo 73 is consistent with the extension direction of the tubular metal sheath. The welding gun 31 is installed at the end of the output shaft of the servo 73. Then, through the servo 73, when the longitudinally wrapped metal sheath is deflected, the output shaft of the servo 73 rotates, thereby driving the welding gun 31 to rotate circumferentially around the tubular metal sheath. At this time, the nozzle of the welding gun 31 rotates circumferentially, thereby adjusting the nozzle of the welding gun 31 to align with the gap position of the metal sheath. At this time, the weld position is consistent with the gap position of the metal sheath, thereby ensuring the welding quality and the wrapping performance of the metal sheath.

[0035] Preferably, the welding gun adjustment mechanism 70 includes a mounting platform 72 and a three-axis motion mechanism 71 that drives the mounting platform 72 to extend in the X-axis, Y-axis and Z-axis directions. The servo 73 is installed on the mounting platform 72. During implementation, the three-axis motion mechanism 71 can drive the mounting platform 72 to perform three-axis motion in the X-axis, Y-axis and Z-axis directions. At this time, the servo 73 and the welding gun 31 thereon can also perform three-axis motion in the X-axis, Y-axis and Z-axis directions along the mounting platform 72 to adjust the position of the servo 73 and the welding gun 31 thereon. On the one hand, the welding gun adjustment mechanism 70 can be suitable for welding cables of different sizes. On the other hand, the position of the welding gun 31 can be adjusted according to the quality of the weld during operation, such as adjusting the distance between the gap between the welding gun 31 and the metal sheath. The three-axis motion mechanism 71 can be a three-axis motion mechanism of the existing technology. In this exemplary embodiment, the driving mechanism of the three-axis motion mechanism 71 adopts a servo motor, and the servo motor is electrically connected to the controller to realize the control of the three-axis motion mechanism 71 through the controller, and automatically adjust the three-axis motion mechanism 71 to adjust the position of the servo 73 and the welding gun 31 thereon.

[0036] Preferably, the longitudinal wrapping forming assembly 60 includes a trimming mechanism 61, a rounding mechanism 62, a longitudinal wrapping arc forming mechanism 63, and a longitudinal wrapping forming mechanism 64, which are arranged in sequence. The trimming mechanism 61 includes a trimming mechanism mounting frame 611, an upper trimming mechanism roller 612, and a lower trimming mechanism roller 613. The upper trimming mechanism roller 612 and the lower trimming mechanism roller 613 are rotatably mounted on the trimming mechanism mounting frame 611 via a mounting shaft, and the upper trimming mechanism roller 612 and the lower trimming mechanism roller 613 are arranged up and down. The circumferential side surface of the lower trimming mechanism roller 613 is an inwardly concave arc surface, and the circumferential side surface of the upper trimming mechanism roller 612 is smaller than the circumferential side surface of the lower trimming mechanism roller 613. At this time, when the strip-shaped metal sheath passes through the upper trimming mechanism roller 612 and the lower trimming mechanism roller 613, the two sides of the strip-shaped metal sheath are trimmed upward. The rounding mechanism 62 includes a rounding mechanism mounting frame 621, an upper rounding mechanism roller 622 and a lower rounding mechanism roller 623. The upper rounding mechanism roller 622 and the lower rounding mechanism roller 623 are rotatably mounted on the rounding mechanism mounting frame 621 through a mounting shaft, and the upper rounding mechanism roller 622 and the lower rounding mechanism roller 623 are arranged up and down. The circumferential side surface of the lower rounding mechanism roller 623 is an inwardly concave arc surface, and the circumferential side surface of the upper rounding mechanism roller 622 is an outwardly convex arc surface. The circumferential side surface of the upper rounding mechanism roller 622 is smaller than the circumferential side surface of the lower rounding mechanism roller 623. At this time, when the metal sheath with the edges rounded on both sides passes through the upper rounding mechanism roller 622 and the lower rounding mechanism roller 623, the metal sheath with the edges rounded on both sides is pressed into a semicircular shape or a semicircular longitudinal wrapping structure. The longitudinal arc-forming mechanism 63 includes a longitudinal arc-forming mechanism mounting frame 631 and a longitudinal arc-forming mechanism sleeve 632 mounted on the longitudinal arc-forming mechanism mounting frame 631. The longitudinal arc-forming mechanism sleeve 632 has a trumpet-shaped through-hole that is larger in front and smaller in the back. The metal sheath, which has been pressed into a semicircular or semi-circular longitudinal arc-forming structure, passes through the longitudinal arc-forming mechanism sleeve 632 and is further longitudinally wrapped into a nearly tubular longitudinal arc-forming structure. At this time, the two sides of the metal sheath are relatively close. In some preferred embodiments, there may be multiple longitudinal arc-forming mechanisms 63 to achieve smoother longitudinal arc-forming. The longitudinal wrapping forming mechanism 64 includes a longitudinal wrapping forming mechanism mounting frame 641 and a longitudinal wrapping forming mechanism sleeve 642 mounted on the longitudinal wrapping forming mechanism mounting frame 641. The longitudinal wrapping forming mechanism sleeve 642 has a trumpet-shaped through hole that is larger in the front and smaller in the back. The metal sheath passes through the longitudinal wrapping forming mechanism sleeve 642 and is further longitudinally wrapped and formed into a tubular shape. At this time, the tubular metal sheath exiting the longitudinal wrapping forming mechanism sleeve 642 has a gap to be welded. It can be understood that the diameter of the through hole of the longitudinal wrapping forming mechanism sleeve 632 on both sides is larger than the diameter of the through hole of the longitudinal wrapping forming mechanism sleeve 642 on both sides, and the circumference of the smaller rear side opening of the longitudinal wrapping forming mechanism sleeve 642 is equal to or slightly larger than the width of the original strip-shaped metal sheath. At this time, when the metal sheath is longitudinally wrapped and formed into a tubular shape, the two sides just abut or the gap is small, which is convenient for welding.

[0037] A wire core guide mechanism 33 is provided in front of the longitudinal wrapping and arcing mechanism 63 for guiding the wire core into the longitudinal wrapping and arcing mechanism 63. The wire core guide mechanism 33 includes a wire core guide mechanism mounting frame 331 and a wire core guide mechanism guide wheel 332 provided on the wire core guide mechanism mounting frame 331. The circumferential side surface of the wire core guide mechanism guide wheel 332 is an inwardly concave arc surface. At this time, the wire core bypasses the wire core guide mechanism guide wheel 332 from below, and after passing through the wire core guide mechanism guide wheel 332, passes through the longitudinal wrapping and arcing mechanism 63 at the longitudinal wrapping and arcing mechanism 63, enters the interior of the metal sheath, and is gradually wrapped by the metal sheath.

[0038] Furthermore, the welding machine 30 may be equipped with a trimmer 34 for trimming the metal sheath on both sides of the strip. The trimmer 34 trims the metal sheath on both sides of the strip, cutting the metal sheath to a certain width. The trimmer 34 also allows the metal sheath to be positioned at a fixed position before proceeding to the next step. The welding machine 30 is equipped with a height adjustment mechanism 35 and a leveling mechanism 36. The leveling mechanism 36 has a horizontal gap whose height is consistent with or slightly greater than the thickness of the strip metal sheath. This allows the trimmed metal sheath to pass through the gap in the leveling mechanism 36 and remain flat and straight before proceeding to the next step. The height adjustment mechanism 35 includes two rollers at different heights. The front roller is at the same height as the metal sheath exiting the trimmer 34, while the rear roller is at the same height as the metal sheath entering the leveling mechanism 36. The trimmer 34 , height adjustment mechanism 35 and leveling mechanism 36 are arranged in sequence. The leveling mechanism 36 is located in front of the longitudinal wrapping forming component 60 . The strip-shaped metal sheath passing through the leveling mechanism 36 enters the longitudinal wrapping forming component 60 for longitudinal wrapping forming.

[0039] In this exemplary embodiment, the trimming machine 34, the height adjustment mechanism 35, the leveling mechanism 36, the edge trimming mechanism 61, the rounding mechanism 62, the wire core guiding mechanism 33, the longitudinal arc forming mechanism 63, the longitudinal arc forming mechanism 64 and the welding gun adjustment mechanism 70 are arranged in sequence and are all arranged on the welding machine 30, and the servo 73 and the welding gun 31 thereon are installed on the welding gun adjustment mechanism 70.

[0040] Preferably, a side detection mechanism 90 is provided on the front side of the longitudinal arc-wrapped mechanism 63. The side detection mechanism 90 is used to detect the side position of the metal sheath formed into an arc shape by the longitudinal arc-wrapped mechanism 63. The side detection mechanism 90 is electrically connected to the controller. When the side detection mechanism 90 detects that the longitudinal arc-wrapped metal sheath deflects to one side, the controller controls the welding gun adjustment mechanism 70 to adjust the welding gun 31 to the deflected side so that the nozzle of the welding gun 31 is directed toward the gap position of the longitudinally formed metal sheath. The method of using the camera 32 to identify the welding position and the gap position for adjustment has a certain hysteresis, making it difficult to predict and adjust in time. If deflection occurs, due to the hysteresis problem, there will always be a small amount of weld deviation in the gap. Based on this, the present invention provides a side detection mechanism 90 in front of the longitudinal arc-forming mechanism 63 through a pre-detection method. If the metal sheath in the longitudinal arc shape deflects to one side and is detected by the side detection mechanism 90, a signal is transmitted to the controller, and the controller controls the welding gun adjustment mechanism 70 to adjust the welding gun 31 to the deflected side so that the nozzle of the welding gun 31 faces the gap position of the longitudinally wrapped metal sheath. This allows for more adjustment time through advance detection and identification, making the adjustment more timely and reliable. The side detection mechanism 90 is provided in front of the longitudinal arc-forming mechanism 63. On the one hand, there is a certain space between the two sides of the metal sheath that is pressed into a semicircular or semicircular longitudinal structure for the side detection mechanism 90 to intervene and facilitate detection. If the cable deflects, the metal sheath at this location will also be deflected and can be detected. If the side detection mechanism 90 is positioned forward, such as in front of the edge trimming mechanism 61 and the rounding mechanism 62, it is difficult to detect because the longitudinal wrapping forming degree of the metal sheath is small and the edges have just been trimmed and leveled, and the position and shape are relatively normal; and if it is placed in front of the longitudinal wrapping forming mechanism 64, it is difficult to allow the side detection mechanism 90 to enter for detection because the space between the two sides of the metal sheath is small.

[0041] Preferably, the side detection mechanism 90 includes a mounting frame 91, a spring piece 92 and a strain gauge 93. The spring piece 92 is installed on the mounting frame 91, the strain gauge 93 is installed in the middle of the spring piece 92, the strain gauge 93 is electrically connected to the controller, and the end of the spring piece 92 is abutted against the side of the metal sheath wrapped in a longitudinal arc shape. When the metal sheath is deflected, the position of the side of the metal sheath will change, with one side becoming relatively higher and the other relatively lower. The end of the spring 92 will abut against the side of the metal sheath that is longitudinally wrapped in an arc shape, so that the position of the side of the metal sheath can be detected. The heightening or lowering will cause the spring 92 to deform, and the deformation will be detected by the strain gauge 93. The strain gauge 93 transmits the detection signal to the controller, and the controller adjusts the welding gun adjustment mechanism 70 according to the signal. If the metal sheath deflects to one side, the controller can control the servo 73 on the welding gun adjustment mechanism 70 to rotate the nozzle of the welding gun 31 thereon toward that side to adjust the nozzle of the welding gun 31 toward the gap position of the longitudinally wrapped metal sheath. It can be understood that, on the one hand, the adjustment is adjusted according to the pulling speed of the cable to ensure that the welding gun 31 completes the adjustment when the gap in the metal sheath passes through the welding gun 31, that is, the welding gun 31 is adjusted as little as possible without being advanced or delayed; on the other hand, the amount of circumferential rotation of the nozzle of the welding gun 31 has a certain relationship with the amount of side deflection of the metal sheath, and this relationship has been obtained through experiments before the operation, that is, the controller can adjust the amount of circumferential rotation of the nozzle of the welding gun 31 according to the amount of side deflection of the metal sheath, to ensure that the nozzle of the welding gun 31 can correspond to the gap in the metal sheath.

[0042] The spring clip 92 is detachably mounted on the mounting bracket 91, and can adjust the height vertically and the strength of the contact between the end of the spring clip 92 and the side of the metal sheath wrapped in a longitudinal arc shape. The height adjustment method is that a slider is provided at the other end of the spring clip 92 away from the metal sheath, and a vertical slide groove matching the slider is provided on the mounting bracket 91, and a screw hole is provided on the mounting bracket 91. By screwing in a bolt, the bolt can be tightened to contact the slider in the slide groove to keep the slider at a certain height in the slide groove.

[0043] Furthermore, the spring clip 92 comprises two pieces, the ends of which respectively abut against the two sides of the longitudinally curved metal sheath. Simultaneous detection on both sides improves detection accuracy. Rollers 94 are provided at the ends of the spring clip 92, which abut against the sides of the longitudinally curved metal sheath via the rollers. The provision of rollers 94 converts sliding friction into rolling friction, thereby improving detection accuracy.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A metal sheathed cable argon arc welding device, comprising a pay-off stand (10), a tape pay-off stand (20), a welding machine (30), a crawler tractor (40) and a take-up stand (50), wherein the welding machine (30) comprises a longitudinally wrapped forming assembly (60) for allowing the metal sheath to pass through and form the cable, and a welding gun (31) for welding the metal sheath covering the cable core into a tubular shape, wherein: The welding machine (30) is also provided with a controller, a welding gun adjustment mechanism (70), and a camera (32) for grasping the gap position of the longitudinally wrapped metal sheath. The welding gun (31) is installed on the welding machine (30) through the welding gun adjustment mechanism (70) so that the nozzle of the welding gun (31) can be rotated circumferentially around the tubular metal sheath through the welding gun adjustment mechanism (70) to adjust the nozzle of the welding gun (31) toward the gap position of the longitudinally wrapped metal sheath.

2. The argon arc welding device for metal sheathed cables according to claim 1, characterized in that: The welding gun adjustment mechanism (70) includes a steering gear (73), the extension direction of the output shaft of the steering gear (73) is consistent with the extension direction of the tubular metal sheath, and the welding gun (31) is installed at the end of the output shaft of the steering gear (73).

3. The argon arc welding device for metal sheathed cables according to claim 2, characterized in that: The welding gun adjustment mechanism (70) includes a mounting platform (72) and a three-axis motion mechanism (71) for driving the mounting platform (72) to extend along the X-axis, the Y-axis, and the Z-axis.

4. The argon arc welding device for metal sheathed cables according to claim 1, characterized in that: The longitudinal wrapping and forming assembly (60) comprises an edge trimming mechanism (61), a rounding mechanism (62), a longitudinal wrapping and arc forming mechanism (63), and a longitudinal wrapping and forming mechanism (64) which are arranged in sequence.

5. The argon arc welding device for metal sheathed cables according to claim 4, characterized in that: A wire core guiding mechanism (33) for guiding the wire core into the longitudinal wrapping and arc forming mechanism (63) is provided in front of the longitudinal wrapping and arc forming mechanism (63).

6. The argon arc welding device for metal sheathed cables according to claim 4, characterized in that: The front side of the longitudinal arc-wrapping mechanism (63) is provided with a side detection mechanism (90), and the side detection mechanism (90) is used to detect the side position of the metal sheath longitudinally wrapped into an arc shape by the longitudinal arc-wrapping mechanism (63). The side detection mechanism (90) is electrically connected to the controller, so that when the side detection mechanism (90) detects that the metal sheath longitudinally wrapped into an arc shape is deflected to one side, the controller controls the welding gun adjustment mechanism (70) to adjust the welding gun (31) to the deflected side so that the nozzle of the welding gun (31) is directed toward the gap position of the longitudinally wrapped metal sheath.

7. The argon arc welding device for metal sheathed cables according to claim 6, characterized in that: The side detection mechanism (90) includes a mounting frame (91), a spring piece (92) and a strain gauge (93), wherein the spring piece (92) is mounted on the mounting frame (91), the strain gauge (93) is mounted in the middle of the spring piece (92), the strain gauge (93) is electrically connected to the controller, and the end of the spring piece (92) abuts against the side of the metal sheath that is longitudinally wrapped in an arc shape.

8. The argon arc welding device for metal sheathed cables according to claim 7, characterized in that: The spring pieces (92) are composed of two pieces, and the ends of the two spring pieces (92) are respectively in contact with the two side edges of the metal sheath which is longitudinally wrapped into an arc shape.

9. The argon arc welding device for metal sheathed cables according to claim 7 or 8, characterized in that: A roller (94) is provided at the end of the spring piece (92), and the spring piece (92) abuts against the side of the metal sheath that is longitudinally wrapped in an arc shape through the roller (94).

10. The argon arc welding device for metal sheathed cables according to claim 1, characterized in that: The welding machine (30) is also provided with a trimming machine (34) for trimming both sides of the metal sheath when the metal sheath is in a strip-shaped structure.

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