Automatic wire feeding and shearing plastic welding equipment

Abstract

The invention provides automatic wire feeding and shearing plastic welding equipment, and belongs to the technical field of hot air type plastic welding. A welding rod is conveyed into a conveying pipe of a welding gun device through a pressure wire feeding device, and a wire shearing device is arranged between the conveying pipe and the output end of the pressure wire feeding device; the wire shearing device shears the welding rod conveyed to the conveying pipe before welding of the welding gun device is completed, and welding is completed. The conveying pipe is parallel to the axis of the welding gun, so that the welding rod enters the conveying pipe in the vertical direction, the wire shearing device is arranged above the conveying pipe, and the shearing head is perpendicular to the conveying pipe, so that a notch of the shearing head in the welding rod can be perpendicular to the welding rod, the plastic welding quality is improved, the head and the tail of a welding seam are welded and closed, and better alignment can be achieved; and the phenomenon of gaps or overlapping during welding is reduced. The pressure wire feeding device and the wire shearing device are located on the side of the welding gun device so that the shearing device can be close to the welding gun device, the welding rod allowance after wire shearing can be reduced, and welding of short welding seams can be achieved easily.

Description

Technical Field

[0001] The present application belongs to the technical field of hot air plastic welding, and in particular relates to an automatic wire feeding and cutting plastic welding device. Background Art

[0002] Plastic welding is a technology that connects plastic materials by heating or pressurizing. There are many welding methods for plastic welding, hot air welding and extrusion welding are the most common. Hot air welding uses a hot air welding gun to heat and melt the plastic welding rod and the film surface to achieve the effect of melting and bonding. Hot air welding guns are now mostly used for repairing plastic parts, so they are mostly manual operations.

[0003] Manual operation of hot air welding guns for plastic welding is prone to welding errors due to operator fatigue, unskilled skills or lack of concentration. In recent years, hot air welding has been increasingly used in large workpieces and large-scale plastic welding operations. The demand for automation upgrades in hot air welding technology has become increasingly obvious, and hot air welding has also gradually developed in the direction of automation in response to demand. At present, most metal welding equipment is automated. Due to the many differences between metal welding and plastic welding in methods, principles, and welding wire characteristics, the existing automated metal welding equipment cannot be used for plastic welding. Therefore, it is urgent to design an automated plastic welding equipment. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] In view of this, according to an embodiment of the present application, an automatic wire feeding and cutting plastic welding device is proposed, comprising:

[0006] Bracket;

[0007] A welding gun device, the welding gun device is arranged on the bracket, the welding gun device comprises a delivery pipe, the delivery pipe is arranged parallel to the axis of the welding gun device, and the delivery pipe is used to position the plastic welding rod;

[0008] A pressure wire feeding device is arranged on a bracket, and the plastic welding rod extends from an output end of the pressure wire feeding device and then passes through a conveying pipe;

[0009] The wire cutting device is arranged on the bracket and disposed between the output end of the pressure wire feeding device and the conveying pipe; the wire cutting device comprises a cutting head, which is arranged close to the conveying pipe and perpendicular to the conveying pipe.

[0010] In a feasible implementation manner, the automatic wire feeding and cutting plastic welding equipment further comprises:

[0011] The robot body comprises a connecting flange, and the bracket is installed on the connecting flange.

[0012] In a feasible implementation manner, the automatic wire feeding and cutting plastic welding equipment further comprises:

[0013] The guide tube is arranged on the bracket, the guide tube is arranged between the shearing head and the output end of the pressure wire feeding device, and the output end of the guide tube is perpendicular to the shearing surface of the shearing head.

[0014] In a feasible implementation manner, the input end of the guide tube is aligned with the output end of the pressure wire feeding device, and the axis of the output end of the guide tube coincides with the axis of the input end of the conveying tube.

[0015] In a feasible implementation manner, the pressure wire feeding device includes:

[0016] A fixing frame connected to the bracket;

[0017] A clamping mechanism, which is arranged on the first side of the fixing frame, and the plastic welding rod passes through the clamping mechanism to clamp the plastic welding rod;

[0018] A transmission mechanism, which is arranged on the second side of the fixing frame and is used to drive the pressing mechanism to move so as to transmit the plastic welding rod;

[0019] The driving device is arranged on the first side of the fixing frame, the output shaft of the driving device is connected with the transmission mechanism, and the driving device drives the transmission mechanism to move.

[0020] In a feasible implementation manner, the transmission mechanism includes:

[0021] A driving wheel, which is rotatably arranged on a fixed frame, and is connected to an output shaft of a driving device so as to drive the driving wheel to rotate through the driving device;

[0022] Two driven wheels, the driven wheels are rotatably arranged on a fixed frame, and the clamping mechanism is connected to the driven wheels so as to drive the clamping mechanism to move through the driven wheels;

[0023] The transmission belt is wound around the driving wheel and the two driven wheels at the same time, so that the driven wheels rotate synchronously with the driving wheel;

[0024] A tensioning mechanism, the tensioning mechanism is adjustably arranged on a fixing frame;

[0025] The tensioning wheel is rotatably arranged on the tensioning mechanism, and the tensioning wheel is in rolling contact with the transmission belt to tension the transmission belt.

[0026] In a feasible implementation manner, the pressing mechanism includes:

[0027] Two clamping wheel groups, the clamping wheel group is connected to the driven wheel, the clamping wheel group and the driven wheel correspond one to one, and the driven wheel drives the corresponding clamping wheel group to move; the clamping wheel group includes a roller and a pressure wheel, the roller is rotatably arranged on the fixed frame, the roller is connected to the driven wheel, and the driven wheel drives the roller to rotate; the pressure wheel is rotatably arranged on the fixed frame, the pressure wheel and the roller are surrounded by a limiting cavity, the roller cooperates with the pressure wheel to press the plastic welding rod passing through the limiting cavity, and adjust the pressure of the plastic welding rod on the workpiece to be welded;

[0028] Two adjustment mechanisms, the adjustment mechanisms correspond to the pressing wheel groups one by one, and the adjustment mechanisms are used to adjust the distance between the pressing wheel and the roller wheel.

[0029] In a feasible implementation manner, the adjustment mechanism includes:

[0030] A mounting seat, the mounting seat is arranged on a fixing frame;

[0031] A lever, the lever is rotatably arranged on the mounting seat, and a first end of the lever is rotatably connected to a rotating shaft of a corresponding pressing wheel;

[0032] A guide post, the guide post passes through the second end of the lever, and the second end of the lever can slide along the guide post;

[0033] An elastic member, the elastic member is arranged on the guide post, and a first end of the elastic member is in contact with a second end of the lever;

[0034] The adjusting member is threadedly connected to the guide column, the adjusting member is fitted with the second end of the elastic member, and the adjusting member is used to adjust the pressing force on the elastic member.

[0035] In a feasible implementation manner, the automatic wire feeding and cutting plastic welding equipment further comprises:

[0036] A pressure sensor is disposed between the elastic member and the second end of the lever to monitor the pressing force applied to the elastic member;

[0037] A temperature sensor, the temperature sensor is adjustably arranged on the bracket, and the temperature sensor is used to monitor the temperature of the hot air blown out of the hot air outlet pipe of the welding gun device;

[0038] The force measuring device comprises a stand and two displacement sensors, the two displacement sensors are arranged on the stand along the length direction of the welding gun device, the two displacement sensors respectively limit the plastic welding rod (19) on both sides of the plastic welding rod and monitor the displacement of the plastic welding rod in the horizontal direction.

[0039] In a feasible embodiment, the wire cutting device comprises:

[0040] A clamping device, the clamping device is arranged on the bracket, and the clamping device comprises two clamping claws;

[0041] Two knife seats, the first ends of the knife seats are connected to the clamping claws, the second ends of the knife seats extend toward the input end of the conveying pipe, and the knife seats correspond to the clamping claws one by one;

[0042] Two shearing heads are arranged on a knife seat, the shearing heads and the conveying pipe are arranged perpendicular to each other, and the shearing heads correspond to the knife seat one by one.

[0043] Compared with the prior art, the automatic wire feeding and cutting plastic welding equipment of the present application has the following beneficial effects:

[0044] The automatic wire feeding and cutting plastic welding equipment provided in the embodiment of the present application includes a bracket, a welding gun device, a pressure wire feeding device and a wire cutting device. The pressure wire feeding device is used to push the plastic welding rod downward so as to transfer the plastic welding rod to the delivery pipe of the welding gun device through the pressure wire feeding device. The wire cutting device is arranged between the delivery pipe and the output end of the pressure wire feeding device. The wire cutting device cuts the plastic welding rod transmitted to the delivery pipe before the welding of the welding gun device is completed to complete the welding. The welding gun device is arranged vertically on the bracket, and the delivery pipe is made parallel to the axis of the welding gun so that the plastic welding rod enters the delivery pipe in a vertical direction. The wire cutting device is arranged above the delivery pipe, and the cutting head is made perpendicular to the delivery pipe so that the cut of the cutting head on the plastic welding rod can be perpendicular to the plastic welding rod, which is beneficial to improve the quality of plastic welding, so that the end and end welding closure of the weld can be better aligned, and the phenomenon of gaps or overlaps in welding is reduced. The welding gun device, the pressure wire feeding device and the wire cutting device are all arranged on the bracket to form a plastic welding tool, which is suitable for working in a small space welding environment. The pressure wire feeding device and the wire cutting device are located on the side of the welding gun device so that the shearing device is close to the welding gun device. By making the shearing head close to the input end of the conveying pipe, the remaining plastic welding rod after wire cutting can be reduced, which is conducive to the welding of short welds. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0046] Figure 1 A schematic structural diagram of a first angle of an automatic wire feeding and cutting plastic welding device provided in an embodiment of the present application;

[0047] Figure 2 A schematic structural diagram of a first angle of an automatic wire feeding and cutting plastic welding device according to another embodiment of the present application;

[0048] Figure 3 A schematic structural diagram of a second angle of an automatic wire feeding and cutting plastic welding device provided in an embodiment of the present application;

[0049] Figure 4 A schematic structural diagram of an automatic wire feeding and cutting plastic welding device from a third angle provided in an embodiment of the present application;

[0050] Figure 5 A schematic structural diagram of a guide tube of an automatic wire feeding and cutting plastic welding device according to an embodiment of the present application;

[0051] Figure 6 A first schematic structural diagram of a pressure wire feeding device of an automatic wire feeding and cutting plastic welding device according to an embodiment of the present application;

[0052] Figure 7 A second schematic structural diagram of a pressure wire feeding device of an automatic wire feeding and cutting plastic welding device according to an embodiment of the present application;

[0053] Figure 8 A schematic structural diagram of a transmission mechanism of an automatic wire feeding and cutting plastic welding device according to an embodiment of the present application;

[0054] Fig. 9 A schematic structural diagram of a tensioning mechanism of an automatic wire feeding and cutting plastic welding device according to an embodiment of the present application;

[0055] Fig.10 A schematic structural diagram of an adjustment mechanism of an automatic wire feeding and cutting plastic welding device according to an embodiment of the present application;

[0056] Fig.11 A schematic structural diagram of a force measuring device of an automatic wire feeding and cutting plastic welding device according to an embodiment of the present application;

[0057] Fig.12 A schematic structural diagram of a shearing device of an automatic wire feeding and shearing plastic welding device provided in an embodiment of the present application from a first angle;

[0058] Fig.13 A schematic structural diagram of a shearing device of an automatic wire feeding and shearing plastic welding device provided in an embodiment of the present application from a second angle;

[0059] in, Figures 1 to 13 The corresponding relationship between the reference numerals and component names in the figure is:

[0060] 11. Bracket; 12. Welding gun device; 13. Pressure wire feeding device; 14. Wire cutting device; 15. Robot body; 16. Guide tube; 18. Temperature sensor; 19. Plastic welding rod; 20. Force measuring device; 21. Pressure sensor; 22. Welding seam; 23. Pressure head;

[0061] 121. conveying pipe; 122. hot air outlet pipe;

[0062] 131. fixing frame; 132. pressing mechanism; 133. transmission mechanism; 134. driving device;

[0063] 1321. Clamping wheel assembly; 1322. Adjusting mechanism;

[0064] 13211, roller; 13212, pressure wheel;

[0065] 13221, mounting seat; 13222, lever; 13223, guide column; 13224, elastic member; 13225, adjusting member;

[0066] 1331, driving wheel; 1332, driven wheel; 1333, transmission belt; 1334, tensioning mechanism; 1335, tensioning wheel;

[0067] 13341, follower block; 13342, adjusting bolt; 13343, connecting seat; 13344, fixing nut;

[0068] 141. Clamping device; 142. Knife holder; 143. Shearing head;

[0069] 201. Stand; 202. Displacement sensor. DETAILED DESCRIPTION

[0070] 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" 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.

[0071] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0072] 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0073] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0074] like Figure 1 and Figure 2 As shown, according to an embodiment of the present application, an automatic wire feeding and cutting plastic welding device is proposed, comprising: a bracket 11, a welding gun device 12, a pressure wire feeding device 13 and a wire cutting device 14; the welding gun device 12 is arranged on the bracket 11, and the welding gun device 12 comprises a delivery pipe 121, and the delivery pipe 121 is arranged parallel to the axis of the welding gun device 12, and the delivery pipe 121 is used to position the plastic welding rod 19; the pressure wire feeding device 13 is arranged on the bracket 11, and the plastic welding rod 19 extends from the output end of the pressure wire feeding device 13 and passes through the delivery pipe 121; the wire cutting device 14 is arranged on the bracket 11, and the wire cutting device 14 is arranged between the output end of the pressure wire feeding device 13 and the delivery pipe 121; the wire cutting device 14 comprises a shearing head 143, and the shearing head 143 is arranged close to the delivery pipe 121, and the shearing head 143 is perpendicular to the delivery pipe 121, and the plastic welding rod 19 is sheared by the shearing head 143, so that the cut of the plastic welding rod 19 is perpendicular to the plastic welding rod 19.

[0075] The automatic wire feeding and wire cutting plastic welding equipment provided in the embodiment of the present application includes a bracket 11, a welding gun device 12, a pressure wire feeding device 13 and a wire cutting device 14. The pressure wire feeding device 13 is used to push the plastic welding rod 19 downward so as to transmit the plastic welding rod 19 to the delivery pipe 121 of the welding gun device 12 through the pressure wire feeding device 13. The wire cutting device 14 is arranged between the delivery pipe 121 and the output end of the pressure wire feeding device 13. The wire cutting device 14 cuts the plastic welding rod 19 transmitted to the delivery pipe 121 before the welding of the welding gun device 12 is completed to complete the welding. By making the delivery pipe 121 parallel to the axis of the welding gun device 12, the plastic welding rod 19 can enter the delivery pipe 121 in the vertical direction, and the plastic welding rod 19 can be parallel to the axis of the welding gun device 12. By arranging a wire cutting device above the delivery pipe 121 and making the cutting head 143 perpendicular to the delivery pipe 121, the cut of the cutting head 143 on the plastic welding rod 19 can be perpendicular to the length direction of the plastic welding rod 19, which is conducive to improving the quality of plastic welding, so that the end and end welding of the weld can be better aligned, and the phenomenon of gaps or overlaps in welding can be reduced. The welding gun device 12, the pressure wire feeding device 13 and the wire cutting device 14 are all arranged on the bracket 11 to form a plastic welding tool, which is suitable for working in a small space welding environment. The pressure wire feeding device 13 and the wire cutting device 14 are located on the side of the welding gun device 12, so that the cutting device is close to the welding gun device 12. By making the cutting head 143 close to the input end of the delivery pipe 121, the excess of the plastic welding rod 19 after wire cutting can be reduced, which is conducive to the welding of short welds.

[0076] It should be noted that hot air plastic welding requires the welding gun device 12 to blow hot air to the plastic welding rod 19 in the conveying pipe 121, so that the plastic welding rod 19 in the conveying pipe 121 is softened by heat, and the two positions to be welded are bonded by the viscosity of the softened plastic welding rod 19. The plastic welding rod 19 passes through the conveying pipe 121, and hot air is blown into the conveying pipe 121 to block the hot air by the conveying pipe 121, so as to prevent the problem of the plastic welding rod 19 being unable to soften due to the rapid diffusion of the hot air, thereby rapidly increasing the temperature of the plastic welding rod 19 in the conveying pipe 121, so that the plastic welding rod 19 is rapidly softened, and the viscosity of the softened plastic welding rod 19 is used to bond the two positions to be welded to form a weld 22.

[0077] Specifically, the two positions to be welded can be located on two workpieces to be welded, that is, the two workpieces to be welded are sealed and bonded together; the two positions to be welded can also be located on the same workpiece to be welded, that is, the breach on the workpiece to be welded is filled to make the breach position sealed.

[0078] Further, such as Figure 3Plastic welding requires a sealed welding gap, so the starting end and the ending end of the weld 22 need to be connected. The plastic welding rod 19 is vertically sheared by the shearing head 143, so that the cut of the plastic welding rod 19 is perpendicular to the plastic welding rod 19, and the cuts at both ends of the plastic welding rod 19 are perpendicular to the plastic welding rod 19, so that the welding closure at both ends of the weld 22 can be better aligned, thereby reducing the gap or overlap at the joint of the weld 22 and improving the welding quality.

[0079] It should be noted that due to the high hardness and brittleness of the plastic welding rod 19, the plastic welding rod 19 cannot be bent at will. By arranging the pressure wire feeding device 13 and the wire cutting device 14 along the length direction of the welding gun device 12, the pressure wire feeding device 13 is arranged above the wire cutting device 14, and the overall length of the welding gun device 12 is relatively large. The pressure wire feeding device 13 and the wire cutting device 14 are arranged along the length direction of the welding gun device 12, which can not only reduce the overall volume and occupied space of the welding tool, and further improve the convenience of welding operations in small spaces, but also make the plastic welding rod 19 as parallel to the axis of the welding gun device as possible. The bending deformation of the plastic welding rod 19 is reduced, and the plastic welding rod 19 is prevented from breaking due to excessive bending angles, thereby ensuring the smoothness and integrity of the feeding plastic welding rod 19. The lower end of the plastic welding rod 19 is softened by hot air so that the plastic welding rod can adhere to the welding gap to achieve plastic welding.

[0080] like Figure 3 and Figure 4 As shown, in a feasible implementation manner, the automatic wire feeding and cutting plastic welding equipment further includes: a robot body 15, the robot body 15 includes a connecting flange, and the bracket 11 is installed on the connecting flange.

[0081] In this technical solution, the welding tool as a whole is installed on the connecting flange of the robot body 15 through the bracket 11. By determining the coordinates of the robot body 15, the automatic displacement of the welding tool is realized, thereby improving the automation degree of hot air welding.

[0082] Furthermore, the bracket 11 and the connecting flange are connected by fasteners to facilitate disassembly and maintenance of the welding tool.

[0083] In some examples, when adjusting the position of the bracket 11, the end of the barrel of the welding gun device 12 is used as the definition origin of the coordinate system, and the coordinate system of the robot body 15 is defined to ensure the accuracy of the welding position. Further, when the end of the barrel of the welding gun device 12 is located at the definition origin of the coordinate system, the welding gun device and the conveying pipe are in a vertical state, and the shearing head is in a horizontal state, so that the shearing head is guided by the conveying pipe to make the cut of the welding rod in a horizontal state; the welding gun device is perpendicular to the workpiece to be welded / the position to be welded, and the welding rod is parallel to the axis of the welding gun device so that the welding rod is also perpendicular to the workpiece to be welded / the position to be welded, so that the cut of the welding rod is parallel to the workpiece to be welded / the position to be welded, thereby reducing the plastic welding gap or the weld overlap when the weld is butted end to end.

[0084] like Figure 1 and Figure 4 As shown, in a feasible embodiment, the automatic wire feeding and cutting plastic welding equipment also includes: a guide tube 16; the guide tube 16 is arranged on the bracket 11, and the guide tube 16 is arranged between the shearing head 143 and the output end of the pressure wire feeding device 13, and the output end of the guide tube 16 is perpendicular to the shearing surface of the shearing head 143.

[0085] In this technical solution, the guide tube 16 is arranged between the shear head 143 and the output end of the pressure wire feeding device 13. By making the output end of the guide tube 16 perpendicular to the shearing surface of the shear head 143, the plastic welding rod 19 can be led out in a direction perpendicular to the shear head 143 after the pressure wire feeding device 13 sends out the plastic welding rod 19. Since the shear head 143 is perpendicular to the conveying pipe 121 and the guide tube 16, it is ensured that a section of the plastic welding rod 19 located between the conveying pipe 121 and the guide tube 16 is perpendicular to the shear head 143, so that the shearing edge of the plastic welding rod 19 when being cut can be perpendicular to the axis of the plastic welding rod 19, so that the welding closure at both ends of the weld can be better aligned, thereby reducing the phenomenon of gaps or overlaps at the weld joint, which is beneficial to improving the welding quality.

[0086] Furthermore, a first guide hole is provided on the guide tube 16, and the shape of the first guide hole is adapted to the shape of the plastic welding rod 19 with an elliptical cross section. As a preferred solution, the cross section of the first guide hole is elliptical, and under the limiting effect of the first guide hole, the phenomenon of notch or overlap at the joint of the weld 22 caused by the rotation of the plastic welding rod 19 during the conveying process can be effectively prevented, thereby further improving the welding quality.

[0087] Furthermore, a second guide hole is provided on the output tube, and the shape of the second guide hole is adapted to the shape of the plastic welding rod 19 with an elliptical cross section. As a preferred solution, the cross section of the second guide hole is elliptical, and under the limiting effect of the second guide hole, it is ensured that the plastic welding rod 19 does not rotate in the output tube, that is, when the plastic welding rod 19 is softened by hot air, the plastic welding rod 19 is prevented from rotating significantly, which is conducive to further improving the subsequent welding quality.

[0088] like Figure 4 As shown, in a feasible embodiment, the input end of the guide tube 16 is aligned with the output end of the pressure wire feeding device 13, and the axis of the output end of the guide tube 16 coincides with the axis of the input end of the delivery tube 121.

[0089] In this technical solution, the input end of the guide tube 16 is aligned with the output end of the pressure wire feeding device 13 to introduce the plastic welding rod 19 sent out by the pressure wire feeding device 13. The axis of the output end of the guide tube 16 coincides with the axis of the input end of the conveying tube 121, so that the plastic welding rod 19 can smoothly enter the conveying tube 121 along the axial direction of the conveying tube 121 without getting stuck. At the same time, the verticality of the sheared cross-section of the plastic welding rod 19 and the axis of the plastic welding rod 19 is ensured, thereby improving the contact accuracy and fusion quality of the plastic welding rod 19 with the workpiece to be welded, which is beneficial to improving the quality of plastic welding, enabling the weld end and tail welding closure to be better aligned, and reducing the phenomenon of gaps or overlaps in welding.

[0090] In some examples, the guide tube 16 may be provided with an arc segment, such as Figure 1 , so as to guide the plastic welding rod 19 when the pressure wire feeding device 13 and the conveying pipe 121 are misaligned by a small distance, so as to ensure that the plastic welding rod 19 can be conveyed in a direction perpendicular to the shearing head 143. As a preferred solution, Figure 2 The guide tube 16 is a straight line segment, and the guide tube 16 and the delivery tube 121 are located on the same vertical line, so that the plastic welding rod 19 is transported in a direction parallel to the welding gun device 12 to avoid bending of the plastic welding rod 19. When the space is limited and the output end of the pressure wire feeding device 13 and the input end of the delivery tube 121 cannot be arranged on the same straight line perpendicular to the shearing head 143, the setting of the guide tube 16 can guide the position of the dislocated plastic welding rod 19 to the delivery tube 121 of the welding gun device 12, ensure that the plastic welding rod 19 between the end of the guide tube 16 and the front end of the delivery tube 121 is perpendicular to the shearing head 143, and ensure that the shearing surface of the plastic welding rod 19 is perpendicular to the axis of the plastic welding rod 19.

[0091] Furthermore, the welding gun device 12 also includes a hot air outlet pipe 122, which is set at an angle to the axis of the welding gun device 12. The main body of the welding gun device 12 remains perpendicular to the welding gap during welding, and the angle of the hot air outlet pipe 122 is fixed to ensure the vertical entry of the plastic welding rod 19, which helps to control the welding quality; the delivery pipe 121 is set parallel to the axis of the welding gun device 12, and the delivery pipe 121 is connected to the hot air outlet pipe 122. Hot air is blown into the delivery pipe 121 through the hot air outlet pipe 122 to soften the plastic welding rod 19 in the delivery pipe 121, so that the plastic welding rod 19 at the output end of the delivery pipe 121 has stickiness.

[0092] Furthermore, a pressure head 23 is provided at the end of the hot air outlet pipe 122, and the pressure head 23 moves with the welding gun to press the softened plastic welding rod 19 at the welding gap of the workpiece to be welded, so that the plastic welding rod 19 is tightly adhered to the object to be welded to form a weld 22. The wire cutting device 14 cuts off the plastic welding rod 19 before welding is completed. Since the plastic welding rod 19 has a high viscosity after softening, the remaining small section of the plastic welding rod 19 in the conveying pipe 121 can be pulled out by the front plastic welding rod 19 under the drive of the pressure head 23, and pressed on the workpiece to be welded through the pressure head 23.

[0093] like Figure 6 and Figure 7 As shown, in a feasible embodiment, the pressure wire feeding device 13 includes: a fixed frame 131, a clamping mechanism 132, a transmission mechanism 133 and a driving device 134; the fixed frame 131 is connected to the bracket 11; the clamping mechanism 132 is arranged on the first side of the fixed frame 131, and the plastic welding rod 19 passes through the clamping mechanism 132 to clamp the plastic welding rod 19; the transmission mechanism 133 is arranged on the second side of the fixed frame 131, and the transmission mechanism 133 is used to drive the clamping mechanism 132 to move to transmit the plastic welding rod 19; the driving device 134 is arranged on the first side of the fixed frame 131, and the output shaft of the driving device 134 is connected to the transmission mechanism 133, and the driving device 134 drives the transmission mechanism 133 to move.

[0094] In this technical solution, a clamping mechanism 132, a transmission mechanism 133 and a driving device 134 are installed on a bracket 11 through a fixing frame 131; the driving device 134 drives the transmission mechanism 133 to move, and the transmission mechanism 133 drives the clamping mechanism 132 to move. The plastic welding rod 19 passes through the clamping mechanism 132, and the clamping mechanism 132 clamps the plastic welding rod 19 during the movement to drive the plastic welding rod 19 to move. This not only realizes the transmission function of the plastic welding rod 19 and the active delivery of the plastic welding rod, but also can adjust the plastic welding rod and the conveying speed and the clamping force of the plastic welding rod on the object to be welded through the clamping mechanism, thereby controlling the welding speed and quality.

[0095] Furthermore, the driving device 134 includes a motor and a reducer, the output shaft of the motor is connected to the output shaft of the reducer, and the output shaft of the reducer is connected to the transmission mechanism. By setting the reducer, the transmission speed of the transmission mechanism 133 is reduced and the transmitted torque is increased.

[0096] Specifically, the reducer is a right-angle reducer to convert the output direction of the motor so that the drive device 134 can be arranged along the length direction of the welding gun device 12, avoiding the overall structure of the drive device 134 from bulging outward, and reducing the overall volume and occupied space of the welding tool.

[0097] like Figure 8 As shown, in a feasible implementation manner, the transmission mechanism 133 includes: a driving wheel 1331, two driven wheels 1332, a transmission belt 1333, a tensioning mechanism 1334 and a tensioning wheel 1335; the driving wheel 1331 is rotatably arranged on the fixed frame 131, and the driving wheel 1331 is connected to the output shaft of the driving device 134 to drive the driving wheel 1331 to rotate through the driving device 134; the driven wheel 1332 is rotatably arranged on the fixed frame 131, and the pressing mechanism 132 is connected to the output shaft of the driving device 134. The driven wheel 1332 is connected to drive the clamping mechanism 132 to move through the driven wheel 1332; the transmission belt 1333 is simultaneously wound around the outer sides of the driving wheel 1331 and the two driven wheels 1332, so that the driven wheel 1332 and the driving wheel 1331 rotate synchronously; the tensioning mechanism 1334 is adjustably arranged on the fixed frame 131; the tensioning wheel 1335 is rotatably arranged on the tensioning mechanism 1334, and the tensioning wheel 1335 is in rolling contact with the transmission belt 1333 to tension the transmission belt 1333.

[0098] In this technical solution, the driving device 134 drives the active wheel 1331 to rotate and drives the two driven wheels 1332 to rotate under the transmission of the transmission belt 1333; the tensioning mechanism 1334 installs the tensioning wheel 1335 adjustably on the fixed frame 131, and adjusts the position of the tensioning mechanism 1334 on the fixed frame 131 to adjust the relative position between the tensioning wheel 1335 and the conveyor belt, and drives the tensioning wheel 1335 to move through the tensioning mechanism 1334, so that the tensioning wheel 1335 tensions the transmission belt 1333 to prevent the transmission belt 1333 from loosening, thereby ensuring the transmission accuracy of the transmission mechanism 133, and then ensuring the transmission accuracy of the clamping mechanism 132 to the plastic welding rod 19, which is beneficial to improving the welding quality.

[0099] Further, such as Fig. 9The tensioning mechanism 1334 includes a follower block 13341, an adjusting bolt 13342, a connecting seat 13343 and a locking nut 13344. The connecting seat 13343 is fixed on the fixing frame 131. The adjusting bolt 13342 passes through the connecting seat 13343 and is rotatably connected to the connecting seat 13343. The tensioning wheel 1335 is rotatably connected to the follower block 13341. The follower block 13341 is threadedly connected to the adjusting bolt 13342 so as to be tightened by the adjusting bolt 1334 2 is rotated to adjust the position of the follower block 13341 on the adjusting bolt 13342, thereby adjusting the position of the tensioning wheel 1335; the locking nut is threadedly connected with the adjusting bolt 13342. After the tensioning wheel 1335 is adjusted to the right position, the locking nut is screwed to fit the locking nut with the fixing seat, and the adjusting bolt 13342 is locked and fixed to prevent the adjusting bolt 13342 from loosening and the tensioning wheel 1335 from shifting, thereby ensuring the tensioning effect of the tensioning wheel 1335 on the transmission belt 1333.

[0100] like Figure 6 and Figure 7 As shown, in a feasible implementation manner, the clamping mechanism 132 includes: two clamping wheel groups 1321 and two adjustment mechanisms 1322; the clamping wheel group 1321 is connected to the driven wheel 1332, the clamping wheel group 1321 corresponds to the driven wheel 1332 one by one, and the driven wheel 1332 drives the corresponding clamping wheel group 1321 to move; the clamping wheel group 1321 includes a roller 13211 and a pressure wheel 13212, the roller 13211 is rotatably arranged on the fixed frame 131, and the roller 132 11 is connected to the driven wheel 1332, and the driven wheel 1332 drives the roller 13211 to rotate; the pressure wheel 13212 is rotatably set on the fixed frame 131, and the pressure wheel 13212 and the roller 13211 are surrounded by a limiting cavity, and the roller 13211 cooperates with the pressure wheel 13212 to press the plastic welding rod 19 passing through the limiting cavity; the adjusting mechanism 1322 corresponds to the clamping wheel group 1321 one by one, and the adjusting mechanism 1322 is used to adjust the distance between the pressure wheel 13212 and the roller 13211.

[0101] In this technical solution, one clamping wheel group 1321 corresponds to one driven wheel 1332, and the clamping wheel group 1321 is connected to the corresponding driven wheel 1332, and the plastic welding rod 19 passes between the two clamping wheel groups, that is, the plastic welding rod 19 passes between the roller 13211 and the corresponding clamping wheel 13212; the roller 13211 is connected to the corresponding driven wheel 1332 on the back of the fixed frame 131 and rotates synchronously, so that the two driven wheels 1332 rotate to drive the two rollers 13211 to rotate respectively, thereby realizing the transmission function of the plastic welding rod 19; the plastic welding rod 19 is pressed tightly against the roller 13211 by the clamping wheel 13212 to prevent the plastic welding rod 19 from slipping during the transportation process, thereby ensuring the uniformity of the transmission of the plastic welding rod 19.

[0102] It should be noted that the plastic welding rod 19 is relatively short and has a certain hardness. The clamping mechanism 132 is used to clamp the plastic welding rod 19 during the conveying process to change the contact force between the plastic welding rod 19 and the workpiece to be welded. Plastic welding rods 19 of different diameters, different workpiece welding requirements (such as sealing), and different hot air temperatures result in different contact forces required between the plastic welding rod 19 and the workpiece to be welded. Therefore, the clamping mechanism 132 can not only control the feeding speed of the plastic welding rod 19, but also control the pressure between the plastic welding rod 19 and the workpiece to be welded through the torque output of the driving device 134, thereby controlling the amount of solder and the welding quality according to the welding requirements.

[0103] It can be understood that when a plastic welding rod 19 is used up, the robot body 15 drives the bracket 11 to move to the base station or the plastic welding rod 19 replenishment position, and feeds another plastic welding rod 19 into the pressure wire feeding device 13 to complete the replenishment of the plastic welding rod 19 and realize the automation of the entire plastic welding process.

[0104] Furthermore, the shape of the limiting cavity is adapted to the shape of the plastic welding rod 19, ensuring that the plastic welding rod 19 does not rotate itself during the feeding process of the pressure wire feeding device 13, and then through the coordinated limiting of the limiting cavity, the first guide hole and the second guide hole, it is ensured that the plastic welding rod 19 does not rotate during the entire feeding process, thereby ensuring the welding quality.

[0105] like Fig.10 As shown, in a feasible implementation manner, the adjustment mechanism 1322 includes: a mounting seat 13221, a lever 13222, a guide column 13223, an elastic member 13224 and an adjustment member 13225; the mounting seat 13221 is arranged on the fixing frame 131; the lever 13222 is rotatably arranged on the mounting seat 13221, and the first end of the lever 13222 is rotatably connected to the rotating shaft of the corresponding pressure wheel 13212; the guide column 13223 passes through the lever The second end of the rod 13222 and the second end of the lever 13222 can slide along the guide column 13223; the elastic member 13224 is arranged on the guide column 13223, and the first end of the elastic member 13224 fits with the second end of the lever 13222; the adjusting member 13225 is threadedly connected to the guide column 13223, and the adjusting member 13225 fits with the second end of the elastic member 13224, and the adjusting member 13225 is used to adjust the clamping force on the elastic member 13224.

[0106] In this technical solution, an adjustment mechanism 1322 is provided on each pressing wheel 13212, so as to adjust the position of the corresponding pressing wheel 13212 through the adjustment mechanism 1322, change the distance between the pressing wheel 13212 and the corresponding roller 13211, thereby adjusting the pressing force on the plastic welding rod 19, and being able to press plastic welding rods 19 of different sizes, thereby improving the practicality of the welding tool; the distance between the pressing wheel 13212 and the corresponding roller 13211 is adjusted by the pressure of the lever 13222 by the elastic member 13224, the lever 13222 is mounted on the mounting seat 13221, and the first end of the lever 13222 is movably connected to the pressing wheel 13212 to ensure that the lever 13222 only adjusts the position of the pressing wheel 13212 without interfering with the rotation of the pressing wheel 13212 itself; the position of the lever 13222 is determined by the elastic member 1322 at the other end 4 is controlled, that is, the lever 13222 is pressed by the elastic member 13224 to make the lever 13222 swing, and then the position of the pressing wheel 13212 is adjusted by the lever 13222; the lever 13222 is passed through the guide column 13223 to limit the swinging trajectory of the lever 13222, and the position of the adjusting member 13225 on the guide column 13223 is changed by screwing the adjusting member 13225 to adjust the pressure on the elastic member 13224 and change the compressed length of the elastic member 13224, and then the swing angle of the lever 13222 is adjusted by the restoring force of the elastic member 13224, so as to adjust the pressure position, thereby adjusting the distance between the pressing wheel 13212 and the corresponding roller 13211, controlling the clamping force on the plastic welding rod 19, and ensuring that the plastic welding rods 19 of different sizes can be smoothly and evenly conveyed to the conveying pipe 121.

[0107] like Figure 2 and Fig.11 As shown, in a feasible embodiment, the automatic wire feeding and cutting plastic welding equipment also includes: a pressure sensor, a temperature sensor 18 and a force measuring device 20; the pressure sensor is arranged between the elastic member 13224 and the second end of the lever to monitor the pressing force exerted on the elastic member 13224; the temperature sensor 18 is adjustably arranged on the bracket 11, and the temperature sensor 18 is used to monitor the hot air temperature blown out by the hot air outlet pipe 122 of the welding gun device 12; the force measuring device includes a stand and two displacement sensors, the two displacement sensors are arranged on the stand along the length direction of the welding gun device, and the two displacement sensors limit the plastic welding rod (19) on both sides of the plastic welding rod respectively, and monitor the displacement of the plastic welding rod in the horizontal direction.

[0108] In this technical solution, the pressure sensor monitors the pressure on the elastic member 13224 in real time to determine whether there is a slipping phenomenon in the wire feeding, and indirectly monitors the wire feeding state of the pressure wire feeding device 13, and then adjusts the wire feeding speed of the pressure wire feeding device 13 according to the monitoring parameters of the pressure sensor, and controls the wire feeding uniformity to measure the feeding length of the plastic welding rod; the temperature sensor 18 monitors the hot air temperature of the hot air outlet pipe 122 of the welding gun device 12 in real time, provides temperature parameter monitoring for the welding process control of the plastic welding rod 19, and then adjusts the hot air output and temperature according to the monitoring parameters of the temperature sensor 18 to control the plastic welding rod 19. The softening speed of the plastic welding rod 19; the displacement sensor 202 obtains the deformation of the plastic welding rod 19 by monitoring the horizontal displacement change of the plastic welding rod 19, and then indirectly obtains the internal tension of the plastic welding rod 19 during the welding process, that is, the contact pressure between the plastic welding rod 19 and the workpiece to be welded, so as to achieve stable feeding of the plastic welding rod 19 and control the stability of welding quality; through the monitoring data of the displacement sensor 202, the pressure sensor 21 and the temperature sensor 18, the pressure wire feeding device 13 and the welding gun device 12 are adjusted to realize the closed-loop operation of the hot air automatic welding equipment, so as to improve the controllability and accuracy of plastic welding.

[0109] In this technical solution, the displacement sensor 202 includes a contact with a monitoring groove arranged on the contact. The opening directions of the monitoring grooves of the two contacts are arranged opposite to each other at 180° to ensure that the deformation of the plastic welding rod 19 in the horizontal direction is captured, and then the internal tension of the plastic welding rod 19 in the welding process is obtained by calculating the deformation of the plastic welding rod 19 in the horizontal direction, that is, the contact pressure between the plastic welding rod 19 and the workpiece to be welded, so as to control the stability of the welding quality.

[0110] It is understandable that during the welding process of the plastic welding rod 19, the plastic welding rod 19 is driven by the clamping wheel group 1321 to feed the wire downward, and after being heated by hot air, the plastic welding rod 19 heats up and softens, and is pressed against the welding workpiece for welding. At this time, the upper end of the plastic welding rod 19 is subjected to the downward thrust of the clamping wheel group 1321 and the reverse resistance of the workpiece, which causes tension to be generated inside the plastic welding rod 19; and because the plastic welding rod 19 has a relatively high hardness, the internal tension of the plastic welding rod 19 will cause the plastic welding rod 19 to bend in the direction of the thinner cross section of the plastic welding rod 19. When the longitudinal cross section of the plastic welding rod 19 is elliptical, the plastic welding rod 19 will bend in the direction of the smaller diameter of the elliptical cross section.

[0111] It should be noted that, since the entire plastic welding rod 19 passes through the guide tube 16 and the welding gun delivery tube 121, the middle part of the entire plastic welding rod 19 will be constrained. According to Saint-Venant's theorem (if the size of the structure is large enough, then the deformation of the area far away from the application point may not have a significant impact on the structure), the displacement sensor 202 only measures the deformation of the plastic welding rod 19 between the clamping wheel group 1321 and the upper end of the guide tube 16; the internal tension of the plastic welding rod 19 is measured by measuring the horizontal deformation of the plastic welding rod 19, and then the contact force between the plastic welding rod 19 and the workpiece is inferred and monitored in real time.

[0112] Specifically, a contact of one displacement sensor 202 is located at 1 / 2 of the height of the stand 201 , and a contact of another displacement sensor 202 is located at 3 / 4 of the height of the stand 201 .

[0113] Furthermore, the temperature sensor 18 is mounted on the bracket 11 through a universal joint, so as to adjust the relative position of the temperature sensor 18 and the hot air outlet pipe 122 and adjust the temperature measurement area.

[0114] Specifically, the temperature sensor 18 is an infrared thermometer, and the displacement sensor is a contact type micro linear displacement sensor.

[0115] like Fig.12 and Fig.13 As shown, in a feasible embodiment, the wire cutting device 14 includes: a clamping device 141, two knife seats 142 and two cutting heads 143; the clamping device 141 is arranged on the bracket 11, and the clamping device 141 includes two clamping claws; the first end of the knife seat 142 is connected to the clamping claw, and the second end of the knife seat 142 extends in the direction close to the input end of the conveying pipe 121, and the knife seat 142 corresponds to the clamping claw one by one; the cutting head 143 is arranged on the knife seat 142, and the cutting head 143 and the conveying pipe 121 are arranged perpendicular to each other, and the cutting head 143 corresponds to the knife seat 142 one by one.

[0116] In this technical solution, a knife seat 142 is installed on each clamping jaw, and a shearing head 143 is installed on each knife seat 142. The clamping jaw of the clamping device 141 drives the knife seat 142 to move, so that the two shearing heads 143 can approach / move away from each other, and then approach / move away from the plastic welding rod 19. When the two shearing heads 143 overlap, the plastic welding rod 19 is cut off. The shearing head 143 and the conveying pipe 121 are arranged perpendicular to each other, so that the plastic welding rod 19 near the shearing head 143 remains perpendicular to the shearing head 143, so that the plastic welding rod 19 can be cut vertically.

[0117] Further, one of the shearing heads 143 is a convex shearing head, and the other shearing head 143 is a concave shearing head, that is, the blade of one shearing head protrudes outward, and the blade of the other shearing head is concave inward, so as to form a "convex-concave" combination shearing structure. Since the cross section of the plastic welding rod 19 is elliptical, when shearing, the shearing head 143 cuts the plastic welding rod 19 along the short diameter direction of the cross section of the plastic welding rod 19. The concave-convex combination shearing head 143 can better limit the plastic welding rod 19 when cutting the plastic welding rod 19, prevent the plastic welding rod 19 from rotating when shearing, avoid the increase of the internal tension of the plastic welding rod 19 affecting the monitoring accuracy of the force measuring structure, and at the same time help to ensure the verticality of the incision and the plastic welding rod 19. Further, the two shearing heads 143 are staggered up and down to ensure the cutting of the plastic welding rod 19.

[0118] In some examples, the clamping device 141 is a pneumatic clamping device 141 , which has a compact structure and is conducive to the miniaturization of welding tools.

[0119] Example:

[0120] When using the welding equipment, the welding tool is first manually fixedly connected to the connecting flange of the robot body 15 by bolts, and then the tool coordinate system of the robot body 15 is defined, and the origin of the coordinate system is defined at the end of the barrel of the plastic welding gun. According to the size of the workpiece to be welded and the welding process requirements, the appropriate specification of the plastic welding rod 19 is selected, and the plastic welding rod 19 is taken out from the wire reel and passes through the two clamping wheel groups 1321, the guide tube 16, the shear head 143 and the conveying tube 121 in sequence.

[0121] According to the specification and diameter of the plastic welding rod 19, the pressure of the adjusting member 13225 on the elastic member 13224 is adjusted, and then the pressure of the rollers 13211 and the pressure wheel 13212 in the same group on the plastic welding rod 19 is adjusted to prevent the plastic welding rod 19 from slipping due to too little pressure or being crushed and deformed due to too much pressure. The locking nut 13344 is adjusted so that the tensioning wheel 1335 tightens the transmission belt 1333, and the tensioning force of the transmission belt 1333 is adjusted to prevent the driven wheel 1332 from slipping due to too little tensioning force of the transmission belt 1333, thereby ensuring the synchronization of the movement of the clamping mechanism 132 and the transmission mechanism, and ensuring the transmission accuracy of the plastic welding rod 19.

[0122] Design the moving trajectory of the robot body 15 and start welding. During the working process, the speed and amount of wire feeding are accurately controlled by the transmission mechanism 133 and the driving device 134. The pressure sensor senses the wire feeding state of the clamping mechanism 132 in real time to determine whether there is slippage. The temperature sensor 18 monitors the hot air temperature at the plastic welding gun in real time. The displacement sensor monitors the internal tension of the plastic welding rod in real time to monitor the contact force between the plastic welding rod and the workpiece, providing parameter monitoring for the control of the welding process of the plastic welding rod 19.

[0123] After the workpieces are welded, the two shearing heads 143 are brought close to cut the plastic welding rod 19 through the clamping device 141, so as to complete the cutting of the plastic welding rod 19 and complete one welding action.

[0124] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0125] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. An automatic wire feeding and cutting plastic welding device, characterized in that: The automatic wire feeding and cutting plastic welding equipment comprises: Bracket (11); A welding gun device (12), the welding gun device (12) being arranged on the bracket (11), the welding gun device (12) comprising a delivery pipe (121), the delivery pipe (121) being arranged parallel to the axis of the welding gun device (12), and the delivery pipe (121) being used for positioning a plastic welding rod (19); A pressure wire feeding device (13), wherein the pressure wire feeding device (13) is arranged on the bracket (11), and the plastic welding rod (19) extends from the output end of the pressure wire feeding device (13) and passes through the conveying pipe (121); A wire cutting device (14), wherein the wire cutting device (14) is arranged on the bracket (11), and the wire cutting device (14) is arranged between the output end of the pressure wire feeding device (13) and the conveying pipe (121); the wire cutting device (14) comprises a cutting head (143), and the cutting head (143) is arranged close to the conveying pipe (121), and the cutting head (143) is perpendicular to the conveying pipe (121).

2. The automatic wire feeding and cutting plastic welding equipment according to claim 1 is characterized in that: The automatic wire feeding and cutting plastic welding equipment also includes: A robot body (15), wherein the robot body (15) comprises a connecting flange, and the bracket (11) is mounted on the connecting flange.

3. The automatic wire feeding and cutting plastic welding equipment according to claim 1 is characterized in that: The automatic wire feeding and cutting plastic welding equipment also includes: A guide tube (16), wherein the guide tube (16) is arranged on the bracket (11), and the guide tube (16) is arranged between the cutting head (143) and the output end of the pressure wire feeding device (13), and the output end of the guide tube (16) is perpendicular to the cutting surface of the cutting head (143).

4. The automatic wire feeding and cutting plastic welding equipment according to claim 3 is characterized in that: The input end of the guide tube (16) is aligned with the output end of the pressure wire feeding device (13), and the axis of the output end of the guide tube (16) coincides with the axis of the input end of the delivery tube (121).

5. The automatic wire feeding and cutting plastic welding equipment according to claim 1 is characterized in that: The pressure wire feeding device (13) comprises: A fixing frame (131), wherein the fixing frame (131) is connected to the bracket (11); a pressing mechanism (132), the pressing mechanism (132) being arranged on a first side of the fixing frame (131), the plastic welding rod (19) passing through the pressing mechanism (132) to press the plastic welding rod (19); A transmission mechanism (133), the transmission mechanism (133) being arranged on the second side of the fixing frame (131), the transmission mechanism (133) being used to drive the pressing mechanism (132) to move so as to transfer the plastic welding rod (19); A driving device (134), wherein the driving device (134) is arranged on a first side of the fixing frame (131), an output shaft of the driving device (134) is connected to the transmission mechanism (133), and the driving device (134) drives the transmission mechanism (133) to move.

6. The automatic wire feeding and cutting plastic welding equipment according to claim 5 is characterized in that: The transmission mechanism (133) comprises: A driving wheel (1331), the driving wheel (1331) being rotatably disposed on the fixing frame (131), the driving wheel (1331) being connected to an output shaft of the driving device (134) so ​​as to drive the driving wheel (1331) to rotate through the driving device (134); two driven wheels (1332), the driven wheels (1332) being rotatably arranged on the fixing frame (131), the pressing mechanism (132) being connected to the driven wheels (1332) so as to drive the pressing mechanism (132) to move via the driven wheels (1332); A transmission belt (1333), wherein the transmission belt (1333) is wound around the outer sides of the driving wheel (1331) and the two driven wheels (1332) so that the driven wheels (1332) rotate synchronously with the driving wheel (1331); A tensioning mechanism (1334), wherein the tensioning mechanism (1334) is adjustably arranged on the fixing frame (131); A tensioning wheel (1335), the tensioning wheel (1335) is rotatably arranged on the tensioning mechanism (1334), and the tensioning wheel (1335) is in rolling contact with the transmission belt (1333) to tension the transmission belt (1333).

7. The automatic wire feeding and cutting plastic welding equipment according to claim 6 is characterized in that: The pressing mechanism (132) comprises: Two pressing wheel groups (1321), the pressing wheel group (1321) is connected to the driven wheel (1332), the pressing wheel group (1321) corresponds to the driven wheel (1332) one by one, and the driven wheel (1332) drives the corresponding pressing wheel group (1321) to move; the pressing wheel group (1321) includes a roller (13211) and a pressing wheel (13212), the roller (13211) is rotatably arranged on the fixed frame (131), and the roller (13212) is rotatably arranged on the fixed frame (131). 11) is connected to the driven wheel (1332), the driven wheel (1332) drives the roller (13211) to rotate; the pressing wheel (13212) is rotatably arranged on the fixing frame (131), the pressing wheel (13212) and the roller (13211) are surrounded by a limiting cavity, the roller (13211) cooperates with the pressing wheel (13212) to press the plastic welding rod (19) passing through the limiting cavity, and adjusts the pressure of the plastic welding rod (19) on the workpiece to be welded; Two adjustment mechanisms (1322), the adjustment mechanisms (1322) corresponding one to the pressing wheel group (1321), and the adjustment mechanisms (1322) are used to adjust the distance between the pressing wheel (13212) and the roller (13211).

8. The automatic wire feeding and cutting plastic welding equipment according to claim 7 is characterized in that: The adjustment mechanism (1322) comprises: A mounting seat (13221), wherein the mounting seat (13221) is arranged on the fixing frame (131); A lever (13222), wherein the lever (13222) is rotatably disposed on the mounting seat (13221), and a first end of the lever (13222) is rotatably connected to a rotating shaft of the corresponding pressing wheel (13212); a guide post (13223), wherein the guide post (13223) passes through the second end of the lever (13222), and the second end of the lever (13222) is capable of sliding along the guide post (13223); an elastic member (13224), wherein the elastic member (13224) is disposed on the guide column (13223), and a first end of the elastic member (13224) is in contact with a second end of the lever (13222); An adjusting member (13225), wherein the adjusting member (13225) is threadedly connected to the guide column (13223), the adjusting member (13225) is fitted with the second end of the elastic member (13224), and the adjusting member (13225) is used to adjust the pressing force on the elastic member (13224).

9. The automatic wire feeding and cutting plastic welding equipment according to claim 8 is characterized in that: The automatic wire feeding and cutting plastic welding equipment also includes: a pressure sensor (21), the pressure sensor (21) being arranged between the elastic member (13224) and the second end of the lever (13222) to monitor the pressing force applied to the elastic member (13224); a temperature sensor (18), the temperature sensor (18) being adjustably arranged on the bracket (11), the temperature sensor (18) being used to monitor the temperature of hot air blown out of the hot air outlet pipe (122) of the welding gun device (12); A force measuring device (20), wherein the force measuring device (20) is arranged on the bracket (11), and the force measuring device (20) is located at the output end of the pressure wire feeding device (13); The force measuring device (20) comprises a stand (201) and two displacement sensors (202), wherein the two displacement sensors (202) are arranged on the stand (201) along the length direction of the welding gun device (12), and the two displacement sensors (202) respectively limit the position of the plastic welding rod (19) on both sides of the plastic welding rod (19) and monitor the displacement of the plastic welding rod (19) in the horizontal direction.

10. The automatic wire feeding and cutting plastic welding equipment according to any one of claims 1 to 9, characterized in that: The wire cutting device (14) comprises: A clamping device (141), wherein the clamping device (141) is arranged on the bracket (11), and the clamping device (141) comprises two clamping claws; Two knife seats (142), wherein the first ends of the knife seats (142) are connected to the clamping claws, and the second ends of the knife seats (142) extend in a direction close to the input end of the conveying pipe (121), and the knife seats (142) correspond to the clamping claws one by one; The two shearing heads (143) are arranged on the knife seat (142), the shearing heads (143) and the conveying pipe (121) are arranged perpendicular to each other, and the shearing heads (143) and the knife seat (142) correspond one to one.

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