Reciprocating welding wire feeder

Abstract

The present application relates to a kind of reciprocating welding wire feeder, wire feeder includes the active wire feeding mechanism installed on welding manipulator and the driven wire feeding mechanism being arranged between welding manipulator and welding head, welding wire of the wire feeder enters its installation slot via reduction gearbox, enters and passes through reduction mechanism, then enters the wire feeding cavity in the connecting housing of driven wire feeding mechanism and then enters welding head for welding, the drive of wire feeding mechanism is carried out, reduction mechanism adjusts the wire feed speed during welding, cooperates welding manipulator and ISM module and carries out reciprocating welding, under the action of welding manipulator in welding, draw welding trajectory, according to the requirement of welding trajectory, the speed of wire feed changes at different times, so that the quality of welding is improved, slag inclusion and unstable welding are avoided, relative to manual operation, efficiency is higher, and the professional technical requirement to operating personnel is not high.

Description

Technical Field

[0001] This invention relates to the field of automation technology, and in particular to a reciprocating welding wire feeding device. Background Technology

[0002] Welding is a technique that uses welding materials to join two or more base materials into a single unit under high temperature or high pressure conditions. In most cases, welding wire is used as the welding material, serving as either filler metal or a conductive electrode. In gas welding and tungsten inert gas (TIG) welding, the welding wire acts as filler metal. In submerged arc welding, electroslag welding, and other gas metal arc welding methods, the welding wire serves as both filler metal and a conductive electrode.

[0003] When performing reciprocating welding, the wire feed speed has different requirements for different welding methods and different welding trajectories. For example, the crescent-shaped wire feeding method requires the end of the wire to swing left and right in a crescent shape along the welding direction, with the middle movement being fast and the sides pausing slightly. The serrated wire feeding method requires the end of the wire to swing forward in a serrated motion and pause slightly on both sides. Different wire feeding methods have different speed requirements for different trajectories. If the swing is too fast or too slow, defects such as slag inclusion, excessive height, disjointing, and inconsistent width are likely to occur.

[0004] Ordinary welding equipment cannot meet the above requirements, so these welding processes often need to be operated manually. However, manual operation is not only time-consuming and labor-intensive, which is not conducive to production, but also requires a high level of technical skills from the operators. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning and bonding machine capable of achieving long-side, flush-side, and inward-recessed positioning.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] A reciprocating welding wire feeding device includes an active wire feeding mechanism mounted on a welding robot and a driven wire feeding mechanism disposed between the welding robot and the welding head.

[0008] The active wire feeding mechanism includes a gearbox, which has an installation cavity inside. The installation cavity contains a speed reduction mechanism and an ISM module for controlling the speed reduction mechanism.

[0009] The driven wire feeding mechanism includes a connecting housing, a motor receiving cavity and a wire feeding cavity inside the connecting housing, a wire feeding mechanism inside the wire feeding cavity, a wire feeding mechanism motor for driving the wire feeding mechanism inside the motor receiving cavity, a robot connection interface for connecting a welding robot on the connecting housing, and a welding head connection port leading to the wire feeding cavity for connecting with the welding head on the connecting housing.

[0010] The welding wire of the wire feeder enters the installation cavity of the reduction box, enters and passes through the reduction mechanism, and then enters the wire feeder mechanism in the wire feeding cavity of the connecting housing of the driven wire feeder mechanism, and then enters the welding head for welding. The wire feeder mechanism drives the wire feeding. The reduction mechanism adjusts the wire feeding speed during welding. The welding robot and the ISM module cooperate to reciprocate welding.

[0011] Through the above structure, by arranging the driving wire feeder mechanism and the driven wire feeder mechanism on the welding robot, and then arranging the welding wire through the reduction box and the connecting housing of the driven wire feeder mechanism, the welding wire is fed to the welding head under the action of the wire feeder mechanism. During welding, the ISM module controls the reduction mechanism, the reduction mechanism adjusts the wire feeding speed, controls the wire feeding speed, and moves the welding head under the action of the welding robot to draw the welding trajectory. According to the requirements of the welding trajectory, the wire feeding speed changes at different times, so that the welding quality is improved, and the slag inclusion and unstable welding are avoided. Compared with manual operation, the efficiency is higher, and the professional technical requirements of the operator are not high.

[0012] Preferably, the reduction mechanism comprises: a housing with an installation slot and a welding wire feeding hole, a driving gear driven by a reduction box motor and rotatably connected to the installation slot through a rotating shaft, two groups of driven gears rotatably connected to the installation slot through rotating shafts and meshed with the driving gear, a first wire feeder wheel coaxially connected with the two groups of driven gears, and two groups of pressure roller housing assemblies installed on the installation slot and located above the two groups of first wire feeder wheels, respectively. A wire feeding gap is left between the pressure roller housing assembly and the first wire feeder wheel.

[0013] Therefore, after the welding wire enters the reduction mechanism, it successively passes through the wire feeding gap left between the two groups of pressure roller housing assemblies and the first wire feeder wheel for wire feeding. Specifically, the driving gear is driven by the reduction box motor, the two groups of driven gears are driven by the driving gear, and the first wire feeder wheel drives the welding wire to feed. When the speed needs to be reduced, the wire feeding gap left between the pressure roller housing assembly and the first wire feeder wheel is compressed by the pressure roller housing assembly to increase the friction, thereby reducing the wire feeding speed. Compared with directly reducing the speed of the reduction box motor, it is more rapid, which is conducive to the rapid adjustment of the wire feeding speed of the whole device and the improvement of the quality of reciprocating welding.

[0014] Preferably, the pressure roller housing assembly comprises: a ball bearing rotatably connected by a rotating shaft and located above the first wire feeder wheel and leaving a wire feeding gap; a pressure roller housing rotatably connected to the installation slot by a rotating shaft and located above the ball bearing; and a pressure regulator arranged on the installation slot for pressing the other end of the pressure roller housing.

[0015] Therefore, the pressure regulator presses the pressure wheel shell, so that the pressure wheel shell contacts the ball bearing downward around the shaft, so that the ball bearing increases the force required for rotation when feeding the wire with the first wire feeder, and the transmission speed of the welding wire is reduced when the speed of the first wire feeder is unchanged. The greater the force applied by the pressure regulator, the greater the force required for the rotation of the ball bearing, and the slower the transmission speed of the welding wire, thereby reducing the wire feeding speed and having the advantage of fast adjustment response.

[0016] Preferably, the wire feeding mechanism comprises a second wire feeder driven by the wire feeding mechanism motor and connected in the wire feeding cavity through the rotating shaft, and a driven wheel located on the side of the second wire feeder and having a wire feeding gap.

[0017] Therefore, the wire feeding mechanism motor drives the second wire feeder to feed the welding joint in cooperation with the driven wheel, thereby achieving the effect of wire feeding.

[0018] Preferably, the driven wheel is arranged in the wire feeding cavity through the driven wheel support; the driven wheel is rotatably connected to the driven wheel support through the rotating shaft, and one end of the driven wheel support is rotatably connected to the wire feeding cavity, and the other end is provided with a pressing mechanism.

[0019] Therefore, the position of the driven wheel support is adjusted by the pressing mechanism, thereby adjusting the size of the wire feeding gap between the driven wheel and the second wire feeder, which is suitable for welding wires of various sizes and ensures stable wire feeding during welding, greatly improving the welding quality.

[0020] The pressing mechanism comprises a first pressing member and a second pressing member, one end of the first pressing member is hinged to the wire feeding cavity, the other end is hinged to the second pressing member, the second pressing member abuts against the driven wheel support, and the hinge between the first pressing member, the second pressing member and the wire feeding cavity is provided with a fixing bolt.

[0021] Therefore, by loosening the fixing bolt, the position of the driven wheel support is adjusted by adjusting the first pressing member and the second pressing member, and after tightening the fixing bolt, the size of the wire feeding gap can be adjusted, which is simple in structure and convenient and fast to use.

[0022] Preferably, the driving wire feeding mechanism and the driven wire feeding mechanism are both provided with a connection communication interface.

[0023] Therefore, by providing the connection communication interface, the control equipment is conveniently connected.

[0024] Preferably, the reduction box is provided with a wire feeding copper pipe quick connector for receiving the welding wire and the reduction mechanism.

[0025] Therefore, by providing the wire feeding copper pipe quick connector, the welding wire is conveniently received into the reduction box.

[0026] Preferably, the ISM module, the wire feeding mechanism motor, and the gearbox motor are all connected to a control center.

[0027] Therefore, by having a control center, the wire feed speed can be adjusted according to the base material and welding requirements, making control more convenient and expanding the applicability of the equipment. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the invention mounted on a welding robot.

[0029] Figure 2 This is a schematic diagram of the overall structure of the active wire feeding mechanism of the present invention.

[0030] Figure 3 This is a schematic diagram of the internal structure of the active wire feeding mechanism of the present invention.

[0031] Figure 4 This is a schematic diagram of the deceleration mechanism of the present invention.

[0032] Figure 5 This is a schematic diagram of the structure of the pressure roller housing assembly of the present invention.

[0033] Figure 6 This is a schematic diagram of the overall structure of the driven wire feeding mechanism of the present invention.

[0034] Figure 7 This is a schematic diagram of the internal structure of the driven wire feeding mechanism of the present invention.

[0035] Figure 8 This is a schematic diagram of the wire feeding mechanism of the present invention.

[0036] Figure 9 This is a schematic diagram of the driven wheel support structure of the present invention. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1-9 The present invention provides a reciprocating welding wire feeding device, which includes an active wire feeding mechanism 100 mounted on a welding robot and a driven wire feeding mechanism 200 disposed between the welding robot and the welding head.

[0039] The active wire feeding mechanism 100 comprises a reduction box 1, which is provided with a mounting cavity, and the mounting cavity is provided with a reduction mechanism 3 and an ISM module 4 for controlling the reduction mechanism 3.

[0040] The driven wire feeding mechanism 200 comprises a connecting housing 6, which is provided with a motor accommodating cavity and a wire feeding cavity, the wire feeding cavity is provided with a wire feeding mechanism 9, the motor accommodating cavity is provided with a wire feeding mechanism motor 10 for driving the wire feeding mechanism 9, and in this embodiment, the wire feeding mechanism 9 is connected with the wire feeding mechanism motor 10 through a synchronous belt, the connecting housing 6 is provided with a robot connecting interface for connecting with a welding robot, and the connecting housing 6 is also provided with a welding head connecting port 12, which is connected to the wire feeding cavity and used for connecting with a welding head.

[0041] Preferably, the reduction mechanism 3 comprises a housing which is provided with a mounting groove 2 and a through hole for feeding welding wire, a driving gear 301 which is driven by a reduction box motor 5 and rotatably connected to the mounting groove 2 through a rotating shaft, two groups of driven gears 302 which are rotatably connected to the mounting groove 2 through rotating shafts and engaged with the driving gear 301 respectively, a first wire feeding wheel 303 which is coaxially connected with the two groups of driven gears 302 respectively, and two groups of pressure roller housing assemblies 304 which are mounted on the mounting groove 2 and located above the two groups of first wire feeding wheels 303 respectively, and a wire feeding gap is left between the pressure roller housing assemblies 304 and the first wire feeding wheels 303.

[0042] Preferably, the pressure roller housing assembly 304 comprises a ball bearing 304a which is rotatably connected through a rotating shaft and located above the first wire feeding wheel 303 and leaves a wire feeding gap, a pressure roller housing 304b which is rotatably connected to the mounting groove 2 through a rotating shaft and located above the ball bearing 304a, and a pressure adjuster 304c which is arranged on the mounting groove 2 and used for pressing the other end of the pressure roller housing 304b.

[0043] Preferably, the wire feeding mechanism 9 comprises a second wire feeding wheel 901 which is driven by the wire feeding mechanism motor 10 and rotatably connected to the wire feeding cavity through a rotating shaft, and a driven wheel 902 which is located at the side of the second wire feeding wheel 901 and leaves a wire feeding gap.

[0044] The pressing mechanism 904 comprises a first pressing member 904a and a second pressing member 904b, one end of the first pressing member 904a is hinged in the wire feeding cavity, the other end of the first pressing member 904a is hinged with the second pressing member 904b, the second pressing member 904b abuts against the driven wheel support 903, and a fixing bolt is arranged at the hinge between the first pressing member 904a, the second pressing member 904b and the wire feeding cavity.

[0045] Preferably, the active wire feeding mechanism 100 and the driven wire feeding mechanism 200 are both provided with a communication interface 13.

[0046] Preferably, the reduction box 1 is provided with a wire feeding copper pipe quick connector 14 for connecting the welding wire with the wire feeding mechanism 3.

[0047] Preferably, the ISM module 4, the wire feeder motor 10 and the gearbox motor 5 are all connected with a control center.

[0048] The specific implementation of the embodiment:

[0049] The welding wire passes through the gearbox 1 and the connecting housing 6 of the driven wire feeder 200 in sequence and is finally guided to the welding head. According to the welding requirements, the control parameters of the ISM module 4, the wire feeder motor 10 and the gearbox motor 5 are set by the control center, and the welding wire is fed to the welding head under the action of the wire feeder 9. In the welding process, the gearbox 3 is controlled by the ISM module 4, and the feeding speed of the welding wire is adjusted by the gearbox 3 to control the feeding speed of the welding wire. Specifically, after the welding wire enters the gearbox 3, it passes through the gap between the two groups of pressure roller housing assemblies 304 and the first wire feeder wheel 303 to feed the welding wire. Specifically, the main gear 301 is driven by the gearbox motor 5 to drive the two groups of driven gears 302, and then the first wire feeder wheel 303 drives the welding wire to feed. When the speed needs to be reduced, the gap between the pressure roller housing assembly 304 and the first wire feeder wheel 303 is compressed to increase the friction, thereby reducing the feeding speed. The principle of the pressure roller housing assembly 304 increasing the friction to reduce the feeding speed is that the pressure roller housing 304b is pressed by the pressure regulator 304c to contact the ball bearing 304a downward around the shaft, so that the ball bearing 304a increases the force required for rotation when feeding the welding wire. When the speed of the first wire feeder wheel 303 remains unchanged, the transmission speed of the welding wire is reduced due to the increase in the force required for rotation of the ball bearing 304a. The welding wire entering the welding head is adjusted and fixed by the driven wire feeder 200, that is, the position of the driven wheel support 903 is adjusted by the compression mechanism 904, and then the size of the gap between the driven wheel 902 and the second wire feeder wheel 901 is adjusted. It is suitable for welding wires of various sizes and ensures that the welding wire feeding remains stable during welding.

[0050] Meanwhile, the housing 6 at the connecting cavity in the embodiment is provided with a buckle type opening and closing cover to facilitate the operator to open and adjust the positions of the compression mechanism 904 and the driven wheel support 903.

[0051] Further, the welding head moves under the action of the welding robot to draw a welding trajectory. According to the requirements of the welding trajectory, the feeding speed changes at different times, thereby improving the welding quality and avoiding slag inclusion and unstable welding.

[0052] Further, taking the method of operating the welding wire in a crescent shape as an example, the end of the welding wire needs to be swung in a crescent shape left and right along the welding direction, the middle part needs to move fast, and the two ends need to stay for a while. Therefore, the welding manipulator drives the welding head to move along the above-mentioned trajectory, keeps the normal wire feeding speed in the middle part during the welding process, and presses the pressure roller shell 304b by driving the pressure regulator 304c at the two ends, so as to reduce the wire feeding speed of the welding wire, avoid defects such as slag inclusion, excessive height, disconnection, inconsistent width, and edge biting at the two ends, and thus realize automatic welding, greatly saving the labor cost.

[0053] Further, taking the method of operating the welding wire in a sawtooth shape as an example, the end of the welding wire needs to be swung in a sawtooth shape forward, and stay for a while at the two ends. Therefore, the welding manipulator drives the welding head to move along the above-mentioned trajectory, keeps the normal wire feeding speed in the middle part during the welding process, and presses the pressure roller shell 304b by driving the pressure regulator 304c at the two ends, so as to reduce the wire feeding speed of the welding wire, avoid defects such as slag inclusion, excessive height, disconnection, inconsistent width, and edge biting at the two ends, and thus realize automatic welding, greatly saving the labor cost.

[0054] It is worth noting that the pressure regulator 304c, the welding manipulator, and the welding head in the device adopt the six-axis manipulator and the welding head for welding in the prior art, and the pressure regulator 304c adopts a structure including all motors, cylinders, and micro pressure regulators that can press the pressure roller shell 304b. The specific structure and working principle are not described again in the present application. At the same time, the control mode of the present application is automatically controlled through the control center, and the control program of the controller can be realized by simple programming by the person skilled in the art, which belongs to the common knowledge in the art, and the control mode and circuit connection are not explained in detail.

[0055] The above is a detailed description of the present application in combination with specific embodiments, which cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, a number of equivalent substitutions or obvious modifications can be made without departing from the concept of the present application, and the same performance or use is achieved, which should be regarded as belonging to the patent protection range determined by the submitted claims.

Claims

1. A reciprocating welding wire feeder, characterized by: The wire feeding device comprises a driving wire feeding mechanism mounted on the welding manipulator and a driven wire feeding mechanism arranged between the welding manipulator and the welding head; The driving wire feeding mechanism comprises a reduction gearbox; The reduction gearbox is provided with a mounting cavity, and the mounting cavity is provided with a reduction mechanism, an ISM module for controlling the reduction mechanism and a reduction gearbox motor of the reduction mechanism; The driven wire feeding mechanism comprises a connecting housing; The connecting housing is provided with a motor accommodating cavity and a wire feeding cavity; The wire feeding cavity is provided with a wire feeding mechanism, and the motor accommodating cavity is provided with a wire feeding mechanism motor for driving the wire feeding mechanism; The connecting housing is provided with a manipulator connecting interface connected with the welding manipulator; The connecting housing is also provided with a welding head connecting port connected with the welding head and leading into the wire feeding cavity; The welding wire of the wire feeding device enters the mounting slot of the reduction gearbox, enters and passes through the reduction mechanism, and then enters the wire feeding mechanism in the wire feeding cavity of the connecting housing of the driven wire feeding mechanism, and then enters the welding head for welding, the wire feeding mechanism drives the wire feeding, the reduction mechanism adjusts the wire feeding speed during welding, and the welding manipulator and the ISM module cooperate to realize reciprocating welding; The reduction mechanism comprises: The housing is provided with a mounting slot and a through hole for feeding welding wire; The driving gear is driven by the reduction gearbox motor and is rotatably connected to the mounting slot through a rotating shaft; Two sets of driven gears are rotatably connected to the mounting slot through rotating shafts and meshed with the driving gear respectively; The first wire feeding wheel is coaxially connected with the two sets of driven gears respectively; The two sets of pressure roller shell assemblies are mounted on the mounting slot and located above the two sets of first wire feeding wheels respectively; The pressure roller shell assemblies and the first wire feeding wheels are provided with a wire feeding gap therebetween; The pressure roller shell assembly comprises: The ball bearing is rotatably connected and located above the first wire feeding wheel and leaves a wire feeding gap; One end of the pressure roller shell is rotatably connected to the mounting slot and located above the ball bearing; The pressure regulator is arranged on the mounting slot and used for pressing the other end of the pressure roller shell; The wire feeding mechanism comprises a second wire feeding wheel driven by the wire feeding mechanism motor and rotatably connected in the wire feeding cavity through a rotating shaft, and a driven wheel located on the side of the second wire feeding wheel and leaving a wire feeding gap; the driven wheel is arranged in the wire feeding cavity through a driven wheel support; the driven wheel is rotatably connected to the driven wheel support through a rotating shaft; One end of the driven wheel support is rotatably connected in the wire feeding cavity, and the other end is provided with a pressing mechanism.

2. A reciprocating welding wire feeder as defined in claim 1, wherein: The pressing mechanism comprises a first pressing member and a second pressing member; One end of the first pressing member is hingedly connected in the wire feeding cavity, and the other end is hingedly connected with the second pressing member; The second pressing member abuts against the driven wheel support; Fixed bolts are arranged at the hinged connections between the first pressing member, the second pressing member and the wire feeding cavity.

3. A reciprocating welding wire feeder as defined in claim 2, wherein: The driving wire feeding mechanism and the driven wire feeding mechanism are also provided with a connection communication interface.

4. A reciprocating welding wire feeder as defined in claim 1, wherein: The reduction gearbox is provided with a wire feeding copper pipe quick connector.

5. A reciprocating welding wire feeder as defined in claim 1, wherein: The ISM module, the wire feeding mechanism motor and the reduction gearbox motor are all connected with a control center.

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