Reciprocating wire feeding mechanism and wire feeding device capable of achieving automatic welding wire feeding

Abstract

The reciprocating wire feeding mechanism comprises a reciprocating sliding structure and a power driving structure, the reciprocating sliding structure comprises a reciprocating sliding block, a first fixing base is arranged on the left side of the reciprocating sliding block, a second fixing base is arranged on the right side of the reciprocating sliding block, and two sliding guide rods are connected between the first fixing base and the second fixing base; a kidney-shaped blind hole is formed in the rear side face of the reciprocating sliding block, a first through hole penetrating left and right is formed in the reciprocating sliding block, the power driving structure comprises a motor assembly, an eccentric wheel and an eccentric wheel bearing, and the eccentric wheel bearing is inserted into the kidney-shaped blind hole; the invention further discloses a wire feeding device for achieving automatic welding wire feeding, the wire feeding device comprises a reciprocating wire feeding mechanism and a four-roller wire feeding mechanism, and the reciprocating wire feeding mechanism and the four-roller wire feeding mechanism are connected with a man-machine interaction system. The reciprocating wire feeding device has the beneficial effects that the wire guide pipe is driven to do linear reciprocating motion, and reciprocating wire feeding is achieved; the welding wire conveying reciprocating frequency is improved, and the welding effect is improved; the structure is simple and operation is stable and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a reciprocating wire feeding mechanism and a wire feeding device for realizing automatic welding wire feeding. Background Art

[0002] Welding is a welding technology that enables metals to achieve high-strength connections. It generates sufficient heat energy through methods such as arc, laser, plasma, friction, etc., and conducts it to the base metal weld, so that the metal on both sides of the weld and the filler metal melt to form a molten pool. After a certain metallurgical reaction process (mass transfer, heat transfer), the molten pool metal cools and crystallizes, reshapes and solidifies to complete a firm and permanent connection. With the continuous expansion of welding applications, welding requirements are increasingly showing diverse characteristics, such as weld appearance, weld sealing, base metal burnout, cracks in thick plates, deformation of thin plates, and even penetration, etc., which undoubtedly require adjustments to the degree of coupling between the transition of the weld metal and the welding heat energy generation process and related process factors (such as arc voltage, current, and wire feeding, etc.).

[0003] In the process of research on welding technology and development of welding practice, in addition to the traditional arc voltage and welding current regulation, the understanding of the influence of wire feeding process on welding process is also gradually deepening, gradually forming three main forms of constant speed wire feeding, pulsating wire feeding and reciprocating wire feeding. Figure 1 You can intuitively understand its different characteristics. Figure 1 As shown in (a), the early wire feeding control mainly focused on feeding the welding wire to the weld pool at a constant speed, continuously and smoothly, and assisted in controlling the weld pool with an appropriate wire feeding speed; this constant speed continuous wire feeding method can achieve the maximum deposition rate and a uniform and smooth weld. The disadvantage is that it lacks flexibility in controlling the spatter-free droplet transition. Pulsated wire feeding is a variable speed wire feeding process, such as Figure 1 As shown in (b), it can continuously change the wire feeding at two speeds during operation; when one of the speeds drops to 0, it evolves into a continuous change between "wire feeding" and "wire stopping", and when one of the speeds drops to a negative value (in the opposite direction), it evolves into a push-pull type of continuous wire feeding. This variable speed pulsating wire feeding method can simulate the effect of manual wire feeding, changing between wire feeding and wire withdrawal, enriching the means of controlling the droplet transition. Figure 1 (c) shows the principle of reciprocating wire feeding, which is based on constant wire feeding and superimposed with a dynamic reciprocating action of the welding wire "forward-backward". Due to its superior performance, it is increasingly used in modern welding practice. For example, in welding applications that require effective control of heat input (such as thin plate / ultra-thin plate welding), forced welding positions that are sensitive to the molten pool (such as vertical upward / downward welding positions), and additive manufacturing, simply relying on the adjustment of arc voltage / current may not achieve the desired effect. Adding a wire feeding speed and direction change to generate external force can improve the droplet transition and achieve more precise and effective control of the molten pool.

[0004] In the wire feeding mechanism, the traditional wire feeding mechanism can only realize the constant speed wire feeding of the welding wire, such as the four-roller wire feeding mechanism. In the wire feeding mechanism disclosed in the patent publication number CN205437414U, the four-roller wire feeding mechanism is disclosed. The wire feeding motor drives the four-wheel transmission to realize the smooth delivery of the welding wire. It realizes constant speed continuous wire feeding, but the control of splash-free droplet transition is not flexible enough. At present, the dynamic reciprocating wire feeding method is partially to realize the linear swing of the carrier plate on which the wire feeding mechanism is installed, which is mainly used for manual welding. This method has some disadvantages. For example, in some application equipment, the wire feeding mechanism as a whole needs to be in a shaking state during operation, which will affect the reliability and even service life of the wire feeding equipment to a certain extent; and the wire feeding mechanism equipment as a whole is constantly reciprocating, which is also a waste from the perspective of energy saving. Some are realized by adding a bidirectional motor to the wire feeding mechanism. However, when the wire feeding is reversed, a special motor is required to overcome the inertia of the wire feeding mechanism components, which is easy to cause the motor to overheat. All these factors highlight the necessity of improving the reciprocating wire feeding mechanism and method. Summary of the invention

[0005] The purpose of the present invention is to provide a reciprocating wire feeding mechanism and a wire feeding device for realizing automatic welding wire feeding, to make feasible optimization of the influence of the wire feeding method proposed in the background technology on welding, to provide a simple and easy innovation based on the existing four-roller wire feeding mechanism for the realization of dynamic reciprocating wire feeding, so as to make up for its shortcomings in welding and solve the problems proposed in the background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a reciprocating wire feeding mechanism for realizing automatic welding wire feeding, comprising a reciprocating sliding structure and a power driving structure, the reciprocating sliding structure comprising a reciprocating slider, a first fixed seat is provided on the left side of the reciprocating slider, a second fixed seat is provided on the right side of the reciprocating slider, two sliding guide rods are connected between the first fixed seat and the second fixed seat, the two sliding guide rods are horizontally penetrated through the upper and lower ends of the reciprocating slider respectively, a waist-shaped blind hole arranged up and down is provided on the rear side surface of the reciprocating slider, a first through hole penetrating left and right for the installation of a wire guide tube is provided on the reciprocating slider, the power driving structure is arranged on the rear side of the reciprocating sliding structure, the power driving structure comprises a motor assembly, an eccentric wheel and an eccentric wheel bearing, the eccentric wheel is installed on the output shaft end of the motor assembly, the eccentric wheel bearing is sleeved on the eccentric wheel, and the eccentric wheel bearing is inserted in the waist-shaped blind hole.

[0007] Further preferably, the reciprocating slider is respectively provided with a step hole at the upper and lower ends for the sliding guide rod to pass through, which is convenient for the installation of the sliding guide rod; and the step holes are arranged at the upper and lower ends of the reciprocating slider to ensure the smooth reciprocating motion of the reciprocating slider; the front side of the reciprocating slider is provided with at least one first fixing screw hole connected to the first through hole, which is used to fix the wire guide tube inserted into the first through hole.

[0008] Further preferably, the first fixing seat is provided with two first guide rod through holes matching the step hole, and the second fixing seat is provided with two second guide rod through holes matching the step hole, and the first guide rod through holes and the second guide rod through holes are used for installing two sliding guide rods.

[0009] Further preferably, the first through hole is arranged in the middle part of the reciprocating slider to enhance the smooth reciprocating motion of the wire guide tube; the first fixed seat is provided with a second through hole matching the first through hole, and the second fixed seat is provided with a U-shaped groove matching the first through hole, and the opening of the U-shaped groove faces forward, and the second through hole and the U-shaped groove facilitate the insertion of the wire guide tube, while ensuring the linear setting of the wire guide tube and smooth wire feeding.

[0010] Further preferably, a first limiting groove is provided on the side of the first fixing seat close to the reciprocating slider, and a second limiting groove corresponding to the first limiting groove is provided on the side of the second fixing seat close to the reciprocating slider, and both the first limiting groove and the second limiting groove are used for installing the position sensor.

[0011] Further preferably, the openings of the first limit groove and the second limit groove are both set backward to facilitate the installation of the position sensor; a second fixing screw hole is provided in the first limit groove, which is used for connecting screws to fix the position sensor installed in the first limit groove; a third fixing screw hole is provided in the second limit groove, which is used for connecting screws to fix the position sensor installed in the second limit groove; a plurality of first assembly screw holes are provided on the rear side of the first fixing seat, which is used for the first fixing seat to be installed and fixed in the wire feeding device by screws; a plurality of second assembly screw holes are provided on the front side of the first fixing seat, which is used for connecting screws to realize the connection between the first fixing seat and the protective sheet metal by screws; a plurality of third assembly screw holes are provided on the rear side of the second fixing seat, which is used for the second fixing seat to be installed and fixed in the wire feeding device by screws; a plurality of fourth assembly screw holes are provided on the front side of the second fixing seat, which is used for the second fixing seat to be connected to the protective sheet metal by screws.

[0012] Further preferably, a protective sheet metal is provided on the front sides of the reciprocating slider, the first fixed seat and the second fixed seat. The protective sheet metal is in a U shape, and a plurality of mounting holes for mating with the second assembly screw holes and the fourth assembly screw holes are provided on its vertical side surface. An avoidance hole is further provided on the vertical side surface of the protective sheet metal. The protective sheet metal can form a semi-surrounding protection structure for the reciprocating slider, the first fixed seat and the second fixed seat. The mounting holes are used for connecting the protective sheet metal with the first fixed seat and the second fixed seat. The avoidance hole is used for avoiding the installation of screws, facilitating the screwing of the screws with the first fixing screw holes, and realizing the fixation of the wire guide tube installed in the first through hole.

[0013] Further preferably, a linear bearing is provided between the sliding guide rod and the reciprocating slider to facilitate the smooth left-right sliding of the reciprocating slider; a retaining ring is provided at one end of the sliding guide rod for the installation limit of the sliding guide rod.

[0014] Further preferably, an eccentric shaft hole is provided on the eccentric wheel along its axis direction. A limiting convex edge is provided at the end of the eccentric wheel close to the motor assembly. A fourth fixing screw hole communicating with the eccentric shaft hole is provided on the side surface of the eccentric wheel. The eccentric shaft hole is used for the insertion of the output shaft of the motor assembly, and reinforcement is realized by connecting screws through the fourth fixing screw holes. The limiting edge is used for the installation limit of the eccentric wheel bearing.

[0015] The present invention also provides a wire feeding device for realizing automatic welding wire feeding. Based on the reciprocating wire feeding mechanism for realizing automatic welding wire feeding, it further includes a four-roll wire feeding mechanism. The four-roll wire feeding mechanism is arranged on the left side of the reciprocating wire feeding mechanism. The reciprocating wire feeding mechanism and the four-roll wire feeding mechanism are connected with a human-machine interaction system. By superimposing the reciprocating wire feeding mechanism on the basis of the four-roll wire feeding mechanism, the dynamic reciprocating feeding of the welding wire is realized, the effect of simulating manual wire feeding is achieved, the droplet transfer can be effectively improved, the more refined and effective control of the molten pool can be realized, and the start-stop control of the reciprocating wire feeding mechanism and the four-roll wire feeding mechanism is realized through the human-machine interaction system.

[0016] Beneficial effects: The reciprocating wire feeding mechanism and wire feeding device for automatic welding wire feeding of the present invention drive the reciprocating sliding structure to move through the power drive structure, thereby driving the wire guide tube to make linear reciprocating motion, specifically, the eccentric wheel is driven to make eccentric motion through the motor assembly, driving the reciprocating slider to make left and right linear reciprocating motion, thereby driving the wire guide tube to reciprocate and feed the wire; the wire feeding device for automatic welding wire feeding changes the length of the welding wire transmission path by coordinating the four-roller wire feeding mechanism and the reciprocating wire feeding mechanism, thereby increasing the reciprocating frequency of the welding wire transportation, thereby achieving the purpose of improving the welding effect; compared with other reciprocating wire feeding implementation methods, the device has a simple structure, stable and reliable operation, and effectively guarantees the stability of the welding process; with the help of changes in wire feeding speed and direction, the molten droplet transition can be improved, thereby effectively controlling the welding heat input, and achieving ideal effects for welding applications such as thin plate welding, all-position welding and additive manufacturing; the wire feeding method of manual welding can be simulated, and even gas shielded welding can produce the weld appearance of argon arc welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the principle of the wire feeding method disclosed in the background technology of the present invention;

[0018] Figure 2 It is a schematic diagram of the exploded structure of a reciprocating wire feeding mechanism for realizing automatic welding wire feeding disclosed in an embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the axial structure of a reciprocating wire feeding mechanism for realizing automatic welding wire feeding disclosed in an embodiment of the present invention;

[0020] Figure 4 It is a left-side structural schematic diagram of a reciprocating wire feeding mechanism for realizing automatic welding wire feeding disclosed in an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the structure of a reciprocating slider disclosed in an embodiment of the present invention from a viewing angle;

[0022] Figure 6 Another perspective structural schematic diagram of the reciprocating slider disclosed in an embodiment of the present invention;

[0023] Figure 7 It is a structural schematic diagram of the first fixing seat disclosed in an embodiment of the present invention;

[0024] Figure 8 It is a structural schematic diagram of the second fixing seat disclosed in an embodiment of the present invention;

[0025] Fig. 9 It is a schematic diagram of the structure of the protective sheet metal disclosed in the embodiment of the present invention;

[0026] Fig.10 It is a structural schematic diagram of an eccentric wheel disclosed in an embodiment of the present invention;

[0027] Fig.11 A schematic structural diagram of a wire feeding device for realizing automatic welding wire feeding disclosed in an embodiment of the present invention;

[0028] Fig.12 A schematic diagram of the length of the welding wire conveying path of a conventional wire feeding device disclosed in an embodiment of the present invention;

[0029] Fig.13 A schematic diagram of the length of the welding wire conveying path of the wire feeding device of the present application with a superimposed reciprocating wire feeding mechanism disclosed in an embodiment of the present invention.

[0030] Figure numerals: 1-reciprocating slider structure, 11-reciprocating slider, 111-waist-shaped blind hole, 112-step hole, 113-first through hole, 114-first fixing screw hole, 12-first fixing seat, 121-first assembly screw hole, 122-first guide rod through hole, 123-second through hole, 124-first limiting groove, 125-second fixing screw hole, 126-second assembly screw hole, 13-second fixing seat, 131-third assembly screw hole, 132-second guide rod through hole Hole, 133-U-shaped groove, 134-second limiting groove, 135-third fixing screw hole, 136-fourth assembly screw hole, 14-sliding guide rod, 141-linear bearing, 142-retaining ring, 15-protective sheet metal, 151-mounting hole, 152-avoidance hole, 2-power drive structure, 21-motor assembly, 22-eccentric wheel, 221-eccentric shaft hole, 222-fourth fixing screw hole, 223-limiting convex edge, 23-eccentric bearing, 3-four-roller wire feeding mechanism. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0032] like Figure 2-10 As shown, a reciprocating wire feeding mechanism for realizing automatic welding wire feeding can drive the wire guide tube to make linear reciprocating motion, realize the purpose of reciprocating wire feeding through the wire guide tube, realize the change of the length of the welding wire transmission path through the reciprocating wire feeding mechanism, increase the reciprocating frequency of welding wire feeding, and achieve the purpose of improving welding effect. Moreover, the reciprocating wire feeding mechanism is a wire feeding method simulating manual welding, which can improve the appearance of the weld and the welding quality. At the same time, it runs stably and reliably, and effectively guarantees the stability of the welding process. The reciprocating wire feeding mechanism includes a reciprocating sliding structure 1 and a power driving structure 2. The power driving structure 2 is arranged on the rear side of the reciprocating sliding structure 1, and the power driving structure 2 is connected to the reciprocating sliding structure 2. The reciprocating sliding structure 2 is connected to the wire guide tube. The reciprocating sliding structure 1 is driven to move by the power driving structure 2, so as to drive the wire guide tube connected to the reciprocating sliding structure 1 to make reciprocating motion, thereby realizing the reciprocating feeding of the welding wire.

[0033] In the present application, the reciprocating sliding structure 1 includes a reciprocating slider 11, a first fixed seat 12 is provided on the left side of the reciprocating slider 11, a second fixed seat 13 is provided on the right side of the reciprocating slider 11, two sliding guide rods 14 are connected between the first fixed seat 12 and the second fixed seat 13, and the two sliding guide rods 14 are horizontally penetrated through the upper and lower ends of the reciprocating slider 11 respectively, and a waist-shaped blind hole 111 arranged up and down is provided on the rear side surface of the reciprocating slider 11, and a first through hole 113 penetrating left and right for installing a wire guide tube is provided on the reciprocating slider 11. Among them, the reciprocating slider 11 is used to connect with the wire guide tube to drive the wire guide tube to reciprocate left and right. The first fixed seat 12 and the second fixed seat 13 are used for the overall installation of the reciprocating wire feeding mechanism and the sliding installation of the reciprocating slider 11. The installation of the reciprocating slider 11 is realized by two sliding guide rods 14. The two sliding guide rods 14 can support the reciprocating slider 11 to slide left and right thereon. The first through hole 113 set on the reciprocating slider 11 is used for the installation and passage of the wire guide tube. The first through hole 113 is set in the middle near front position of the reciprocating slider 11, which is convenient for the smooth transportation of the welding wire and the transportation of the welding wire. The reciprocating slider 11 is driven by the power drive structure 2 to reciprocate left and right along the sliding guide rod 14, so that the left and right reciprocating movement of the wire guide tube can be realized, and reciprocating wire feeding can be realized.

[0034] In the present application, the power drive structure 2 includes a motor assembly 21, an eccentric wheel 22 and an eccentric wheel bearing 23. The eccentric wheel 22 is installed on the output shaft end of the motor assembly 21, the eccentric wheel bearing 23 is sleeved on the eccentric wheel 22, and the eccentric wheel bearing 23 is inserted into the waist-shaped blind hole 111. Among them, the motor assembly 21 can drive the eccentric wheel 22 to rotate, and the eccentric wheel bearing 23 is driven to rotate through the eccentric wheel 22, so that the eccentric wheel bearing 23 can rotate eccentrically in the waist-shaped blind hole 111 on the reciprocating slider 11, and because the waist-shaped blind hole 111 is arranged up and down, when the long diameter end of the eccentric wheel 22 rotates to the top or bottom, it will not contact the upper and lower parts of the inner wall of the waist-shaped blind hole 111, and will not drive the reciprocating slider 11 to move. When the long diameter end of the eccentric wheel 22 rotates to a horizontal position, it will contact the left or right part of the inner wall of the waist-shaped blind hole 111, pushing the reciprocating slider 11 to move left or right. As the motor assembly 21 drives the eccentric wheel 22 to rotate continuously, it can push the reciprocating slider 11 to reciprocate left and right, and finally realize the left and right reciprocating motion of the wire guide tube, and realize reciprocating wire feeding.

[0035] In the present application, a step hole 112 for the sliding guide rod 14 to pass through is respectively provided at the upper and lower ends of the reciprocating slider 11, for the sliding guide rod 14 to pass through; the front side of the reciprocating slider 11 is provided with at least one first fixing screw hole 114 connected to the first through hole 113, for screwing in a screw, so as to fix the wire guide tube inserted into the first through hole 113.

[0036] Based on the above scheme, two first guide rod through holes 122 are provided on the first fixed seat 12, and two second guide rod through holes 132 are provided on the second fixed seat 13. Both the first guide rod through holes 122 and the second guide rod through holes 132 are provided in cooperation with the step hole 112, and are used for mounting the two ends of the sliding guide rod 14. The step hole 112 is provided at the upper and lower ends of the reciprocating slider 11, so the two first guide rod through holes 122 are provided at the upper and lower ends of the first fixed seat 12, and the two second guide rod through holes 132 are provided at the upper and lower ends of the second fixed seat 13, thereby realizing the upper and lower interval arrangement of the sliding guide rod 14, which can effectively ensure the stability of the left and right reciprocating motion of the reciprocating slider 11.

[0037] In the present application, the first through hole 113 is arranged in the middle of the reciprocating slider 11 to ensure that the wire guide tube installed in the first through hole 113 moves smoothly; the first fixed seat 12 is provided with a second through hole 123, and the second fixed seat 13 is provided with a U-shaped groove 133, and the opening of the U-shaped groove 133 faces forward. The second through hole 123 and the U-shaped groove 133 are arranged in coordination with the first through hole 113 to ensure that the wire guide tube can pass through the second through hole 123 and the first through hole 113 in sequence, thereby ensuring that the wire guide tube is installed in a straight line, thereby ensuring smooth and effective transportation of the welding wire, and the U-shaped groove 133 facilitates the passage of the welding wire.

[0038] In the solution of the present application, a first limiting groove 124 is provided on the side of the first fixed seat 12 close to the reciprocating slider 11, and a second limiting groove 134 corresponding to the first limiting groove 124 is provided on the side of the second fixed seat 13 close to the reciprocating slider 11. Both the first limiting groove 124 and the second limiting groove 134 are used for the installation of a position sensor, for detecting the position of the reciprocating slider 11 and the wire guiding tube during reciprocating motion, ensuring the effective progress of the reciprocating motion and the monitoring of the operation process. And based on this solution, the openings of the first limiting groove 124 and the second limiting groove 134 are both arranged backward, facilitating the installation of the circuit of the position sensor and not affecting the reciprocating motion of the reciprocating slider 11; a second fixing screw hole 125 is provided in the first limiting groove 124, and a third fixing screw hole 135 is provided in the second limiting groove 134. The second fixing screw hole 125 is used for fixing the position sensor in the first limiting groove 124, and the third fixing screw hole 135 is used for fixing the position sensor in the second limiting groove 134, which can be achieved by screw connection. A plurality of first assembly screw holes 121 are provided on the rear side of the first fixed seat 12, and a plurality of second assembly screw holes 126 are provided on the front side of the first fixed seat 12. A plurality of third assembly screw holes 131 are provided on the rear side of the second fixed seat 13, and a plurality of fourth assembly screw holes 136 are provided on the front side of the second fixed seat 13. Among them, the first assembly screw holes 121 are used for the installation and fixation of the first fixed seat 12, the third assembly screw holes 131 are used for the installation and fixation of the second fixed seat 13, and the second assembly screw holes 126 and the fourth assembly screw holes 136 are used for connection with external protection components, such as a machine shell and a cover plate. In the present application, a protective sheet metal 15 is covered on the front sides of the first fixed seat 12 and the second fixed seat 13, and the connection between the protective sheet metal 15 and the first fixed seat 12 and the second fixed seat 13 is realized through the second assembly screw holes 126 and the fourth assembly screw holes 126.

[0039] Based on the above solution, a protective sheet metal 15 is covered on the front sides of the reciprocating slider 11, the first fixed seat 12 and the second fixed seat 13, for the overall protection of the reciprocating sliding structure 1. The protective sheet metal 15 is in a U-shaped form, achieving a semi-surrounding structure for the reciprocating slider 11, the first fixed seat 12 and the second fixed seat 13, with a better protection effect; a plurality of mounting holes 151 for cooperating with the second assembly screw holes 126 and the fourth assembly screw holes 136 are provided on the vertical side surface of the protective sheet metal 15, that is, through the mounting holes 151, the screws are installed into the second assembly screw holes 126 and the fourth assembly screw holes 136 to realize the connection between the protective sheet metal 15 and the first fixed seat 12 and the second fixed seat 13. An avoidance hole 152 is also provided on the vertical side surface of the protective sheet metal 15, for avoiding the first fixing screw hole 114, facilitating the screw to penetrate through the protective sheet metal 15 and be screwed into the first fixing screw hole 114 for fixing the wire guiding tube passing through the first through hole 113, and at the same time facilitating the fine adjustment of the fixing of the wire guiding tube, only by loosening the screw in the first fixing screw hole 114.

[0040] In the solution of the present application, a linear bearing 141 is provided between the sliding guide rod 14 and the reciprocating slider 11, so that the reciprocating slider 11 can slide left and right along the sliding guide rod 14, ensuring smooth left and right reciprocating motion of the reciprocating slider 11. A retaining ring 142 is provided at one end of the sliding guide rod 14, which is used to limit the installation of the sliding guide rod 14 and ensure the installation accuracy and firmness of the sliding guide rod 14.

[0041] In the scheme of the present application, an eccentric shaft hole 221 is provided on the eccentric wheel 22 along its axial direction, which is used to connect the eccentric wheel 22 with the output shaft of the motor assembly 21 to realize the eccentric rotation of the eccentric wheel 22; a limiting flange 223 is provided at the end of the eccentric wheel 22 close to the motor assembly 21, which is used for installation and limiting of the eccentric wheel bearing 23; a fourth fixing screw hole 222 is provided on the side of the eccentric wheel 22 and is connected to the eccentric shaft hole 221, and the installation and fixation of the eccentric wheel 22 is realized by the cooperation of the screw and the fourth fixing screw hole 222.

[0042] like Fig.11 As shown, the present application also provides a wire feeding device for realizing automatic welding wire feeding, based on the reciprocating wire feeding mechanism for realizing automatic welding wire feeding, and also includes a four-roller wire feeding mechanism 3, which is arranged on the left side of the reciprocating wire feeding mechanism, and the reciprocating wire feeding mechanism and the four-roller wire feeding mechanism 3 are connected to a human-machine interaction system. Among them, the four-roller wire feeding mechanism 3 is an existing wire feeding mechanism, which realizes the delivery of welding wire through four-wheel transmission under the power of the wire feeding motor, and superimposes the reciprocating wire feeding mechanism, that is, an auxiliary wire feeding mechanism is added to the rear end of the traditional wire feeding mechanism, so that the length of the welding wire transmission path between the four-roller wire feeding mechanism 3 and the wire outlet can be dynamically changed, which can effectively increase the wire feeding frequency, realize the wire feeding action of simulating manual welding, increase the reciprocating frequency of welding wire delivery, improve the appearance of welding seam, and have good welding effect. The reciprocating frequency can reach 30HZ, which is much greater than the reciprocating frequency of traditional wire feeding; and the wire feeding is stable and quiet. The four-roller wire feeding mechanism 3 and the reciprocating wire feeding mechanism are installed in the same chassis and controlled by the human-computer interaction system. The four-roller wire feeding mechanism 3 and the reciprocating wire feeding mechanism are controlled by the human-computer interaction system to act separately, that is, only the four-roller wire feeding mechanism 3 can work independently to realize constant speed wire feeding; the four-roller wire feeding mechanism 3 and the reciprocating wire feeding mechanism can also work simultaneously to realize dynamic reciprocating wire feeding.

[0043] like Figure 12-13 As shown, Fig.12 Schematic diagram of the wire feeding path of the traditional wire feeding mechanism. From the wire feeding port to the wire outlet, the wire feeding path is the sum of the feeding length L1 of the four-roller wire feeding mechanism 3 and the length L2 of the wire guide tube, that is, the wire feeding path L = L1 + L2; Fig.13The figure is a schematic diagram of the welding wire conveying path of the wire feeding device of the present invention. The conveying path of the welding wire is the sum of the conveying length L1 of the four-roller wire feeding mechanism 3 and the length (L3+L4) of the wire guide tube, wherein L3 is the conveying length of the reciprocating wire feeding mechanism. The reciprocating motion of the reciprocating wire feeding mechanism is used to convey the welding wire from the outlet of the four-roller wire feeding mechanism 3 to the wire outlet. It can be seen from the figure that L2=L3+L4+L3, that is, the length (L3+L4) of the wire guide tube of the present invention is L3 shorter than the length of the traditional wire guide tube, but through the reciprocating motion of the reciprocating wire feeding mechanism, the entire transmission path is in dynamic change, and the motion path length of the wire guide tube also reaches L3+L4+L3. The reciprocating wire feeding mechanism drives the wire guide tube (L3+L4) to swing, thereby realizing the reciprocating wire feeding action of the welding wire, realizing the wire feeding action imitating manual welding, and achieving the purpose of improving the welding quality. And through the reciprocating wire feeding mechanism, the reciprocating frequency can be improved, which can improve the molten droplet transfer and effectively control the welding heat input, and can achieve ideal results for welding applications such as thin plate welding and all-position welding additive manufacturing.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the invention content within the protection scope of the present invention.

Claims

1. A reciprocating wire feeding mechanism for realizing automatic welding wire feeding, characterized in that: The invention comprises a reciprocating sliding structure (1) and a power driving structure (2), wherein the reciprocating sliding structure (1) comprises a reciprocating slider (11), a first fixed seat (12) is provided on the left side of the reciprocating slider (11), a second fixed seat (13) is provided on the right side of the reciprocating slider (11), two sliding guide rods (14) are connected between the first fixed seat (12) and the second fixed seat (13), the two sliding guide rods (14) are respectively horizontally penetrated at the upper and lower ends of the reciprocating slider (11), and the rear side surface of the reciprocating slider (11) is provided with a A waist-shaped blind hole (111), the reciprocating slider (11) is provided with a first through hole (113) running through the left and right sides for installing a wire guide tube, the power drive structure (2) is arranged on the rear side of the reciprocating sliding structure (1), the power drive structure (2) comprises a motor assembly (21), an eccentric wheel (22) and an eccentric wheel bearing (23), the eccentric wheel (22) is installed on the output shaft end of the motor assembly (21), the eccentric wheel bearing (23) is sleeved on the eccentric wheel (22), and the eccentric wheel bearing (23) is inserted into the waist-shaped blind hole (111).

2. A reciprocating wire feeding mechanism for automatic welding wire feeding according to claim 1, characterized in that: The reciprocating slider (11) is provided with a stepped hole (112) at the upper and lower ends for the sliding guide rod (14) to pass through, respectively, and the front side of the reciprocating slider (11) is provided with at least one first fixing screw hole (114) connected to the first through hole (113).

3. A reciprocating wire feeding mechanism for realizing automatic welding wire feeding according to claim 2, characterized in that: The first fixing seat (12) is provided with two first guide rod through holes (122) matching the step hole (112), and the second fixing seat (13) is provided with two second guide rod through holes (132) matching the step hole (112).

4. The reciprocating wire feeding mechanism for automatic welding wire feeding according to claim 1, characterized in that: The first through hole (113) is arranged in the middle of the reciprocating slider (11); the first fixed seat (12) is provided with a second through hole (123) matching the first through hole (113); the second fixed seat (13) is provided with a U-shaped groove (133) matching the first through hole (113); the opening of the U-shaped groove (133) faces forward.

5. The reciprocating wire feeding mechanism for realizing automatic welding wire feeding according to claim 1, characterized in that: A first limiting groove (124) is provided on the side of the first fixed seat (12) close to the reciprocating slider (11), and a second limiting groove (134) corresponding to the first limiting groove (124) is provided on the side of the second fixed seat (13) close to the reciprocating slider (11).

6. A reciprocating wire feeding mechanism for automatic welding wire feeding according to claim 5, characterized in that: The openings of the first limiting groove (124) and the second limiting groove (134) are both arranged backwards, a second fixing screw hole (125) is arranged in the first limiting groove (124), a third fixing screw hole (135) is arranged in the second limiting groove (134), a plurality of first assembly screw holes (121) are arranged on the rear side of the first fixing seat (12), a plurality of second assembly screw holes (126) are arranged on the front side of the first fixing seat (12), a plurality of third assembly screw holes (131) are arranged on the rear side of the second fixing seat (13), and a plurality of fourth assembly screw holes (136) are arranged on the front side of the second fixing seat (13).

7. A reciprocating wire feeding mechanism for automatic welding wire feeding according to claim 6, characterized in that: A protective sheet metal (15) is provided on the front side of the reciprocating slider (11), the first fixed seat (12) and the second fixed seat (13). The protective sheet metal (15) is in a U shape, and a plurality of mounting holes (151) for cooperating with the second assembly screw holes (126) and the fourth assembly screw holes (136) are provided on its vertical side surface. An avoidance hole (152) is also provided on the vertical side surface of the protective sheet metal (15).

8. The reciprocating wire feeding mechanism for automatic welding wire feeding according to claim 1, characterized in that: A linear bearing (141) is provided between the sliding guide rod (14) and the reciprocating slider (11), and a retaining ring (142) is provided at one end of the sliding guide rod (14).

9. The reciprocating wire feeding mechanism for automatic welding wire feeding according to claim 1, characterized in that: An eccentric shaft hole (221) is provided on the eccentric wheel (22) along its axial direction. A limiting convex edge (223) is provided at the end of the eccentric wheel (22) close to the motor assembly (21). A fourth fixing screw hole (222) communicating with the eccentric shaft hole (221) is provided on the side surface of the eccentric wheel (22).

10. A wire feeding device for automatic welding wire feeding, characterized in that: The reciprocating wire feeding mechanism for realizing automatic welding wire feeding according to any one of claims 1-9 further includes a four-roller wire feeding mechanism (3). The four-roller wire feeding mechanism (3) is arranged on the left side of the reciprocating wire feeding mechanism, and a man-machine interaction system is connected to the reciprocating wire feeding mechanism and the four-roller wire feeding mechanism (3).

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