Self-heating welding wire welding gun

Abstract

The utility model relates to a self-heating welding wire welding gun which comprises a tubular welding gun body, a guide head, a heating pipe and a conveying pipe are sequentially arranged on the welding gun body in the axial direction, a wire feeding channel is formed in the welding gun body along the axis in a penetrating mode, and a heating coil is arranged in the tubular side wall of the heating pipe around the axis in a surrounding mode. A controller is arranged on the outer side wall of the conveying pipe and electrically connected with the heating coil, the welding wire penetrates into the wire feeding channel from one end of the conveying pipe, the controller controls current change in the heating coil and heats and melts the welding wire, and the melted welding wire flows out of an opening in the end face of the guide head. The welding wire in the wire feeding channel is heated through the heating coil, the welding quality and the production efficiency are improved, the problem of preheating of the welding wire in the existing welding process is solved, the preheated welding wire is continuously output, the output power of welding laser is reduced, the welding quality is improved, and the production cost is reduced. The device is simple in structure, convenient to install and operate and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a self-heating welding wire welding gun. Background Art

[0002] Welding is a manufacturing process and technology that connects alloys, metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. During the welding process, the welding speed and the amount of welding wire filling need to be controlled. If the two match, a satisfactory weld can be obtained. The energy density of laser welding is highly concentrated, and the heating area is small relative to the surface area of ​​the welding wire. If the welding wire enters the weld directly, the laser not only needs to heat the base metal in the weld area, but also needs to heat the welding wire to melt it in order to melt the two and achieve metallurgical bonding, which leads to a decrease in welding speed and deposition efficiency. Increasing laser power is a means to improve deposition efficiency, but it will also cause the equipment cost and volume to increase exponentially, which is not conducive to the promotion of this technology. Therefore, improving the deposition efficiency and speed of welding wire has become an urgent technical requirement.

[0003] Therefore, it is necessary to provide a device for preheating welding wire without using laser, so as to avoid the problem of insufficient energy in the welding area due to heat distribution to the greatest extent, improve welding quality and safeguard corporate interests. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a self-heating welding wire welding gun to solve the problem of insufficient energy in the welding area caused by laser melting the welding wire due to heat distribution during welding.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A self-heating welding wire welding gun comprises a tubular welding gun body, on which a guide head, a heating tube and a conveying tube are sequentially arranged along the axial direction, a wire feeding channel is opened inside the welding gun body along the axis, a heating coil is wound around the axis inside the tubular side wall of the heating tube, a controller is arranged on the outer side wall of the conveying tube, the controller is electrically connected to the heating coil, the welding wire passes into the wire feeding channel from one end of the conveying tube, the controller controls the current change inside the heating coil to heat and melt the welding wire, and the melted welding wire flows out from the end face opening of the guide head.

[0007] As a preferred embodiment, the heating coil is connected to a thermocouple at one end near the guide head inside the heating tube, and the other end of the heating coil is connected to a power line, which passes through the side wall of the conveying tube.

[0008] As a preferred implementation, a current conversion module and a control board for controlling current are provided inside the controller.

[0009] As a preferred embodiment, the control board is also connected with a temperature setting knob, an indicator light, a start button and an end button.

[0010] As a preferred embodiment, the indicator light is an LED two-color light-emitting diode.

[0011] As a preferred embodiment, the guiding head is arranged as an arc bent downward.

[0012] The beneficial effects of the present utility model are as follows: The present utility model heats the welding wire in the wire feeding channel through a heating coil. The controller controls the on-off of the power supply according to the feedback signal of the thermocouple, and reflects the heating degree according to the output of the thermocouple. The welding operator can observe that the indicator light emits different colors of light and make judgments based on this. The start button and the end button are used to adjust the welding operation, improving the welding quality and production efficiency, solving the problem of preheating the welding wire in the existing welding process. The preheated welding wire is continuously output, reducing the output power of the welding laser and improving the welding quality. The structure of the present utility model is simple, easy to install, convenient to operate and highly practical. Description of the Drawings

[0013] The following further details the specific embodiments of the present utility model in conjunction with the drawings, where:

[0014] Figure 1 is a structural schematic diagram of the present utility model;

[0015] Figure 2 is a principle flow chart of the controller of the present utility model;

[0016] Figures 1 to 2 Explanation of the reference numerals in the drawings: 1, guiding head; 2, wire feeding channel; 3, heating tube; 31, thermocouple; 32, heating coil; 33, power cord; 4, controller; 41, rectifier module; 42, control board; 43, temperature setting knob; 44, indicator light; 45, start button; 46, end button; 5, delivery pipe; 6, welding wire. Specific Embodiments

[0017] The following details the specific implementation schemes of the present utility model in conjunction with the drawings.

[0018] Such as Figures 1 to 2The self-heating wire welding torch shown has a welding torch body that includes a guiding head 1, a heating tube 3, and a conveying tube 5 connected in sequence. An integrally connected wire feeding channel 2 is axially arranged along the center of the guiding head 1, the heating tube 3, and the conveying tube 5. A controller 4 is installed on the conveying tube 5. Inside the heating tube 3, a heating coil 32 is wound around the wire feeding channel 2. The side wall of the heating tube 3 can be made of ceramic material, which can withstand high temperatures and is not easily deformed. One end of the heating coil 32 close to the guiding head 1 is provided with a thermocouple 31 around the circumference for obtaining the temperature of the heating zone. The heating coil 32 is made of conventional copper wire, and the conveying tube 5 can be made of conventional phenolic resin. Inside the controller 4, there is a commutation module 41 for controlling the on / off of the heating current and a control board 42. On the control board 42, there are a start button 45 for operating the controller 4, a temperature setting knob 43, an indicator light 44, an end button 46, and a voltage transformation module.

[0019] In this embodiment, the commutation module 41 preferably uses a conventional bidirectional thyristor unit to control the on / off of the heating current. The on / off signal is sent from the IO4 port on the control board 42. The power supply for the entire control board 42 is responsible by the voltage transformation module, which is connected to the A power line and the B power line in the power line 33 to convert the AC power supply into a 5V DC power supply.

[0020] The thermocouple 31 includes an A thermocouple, a B thermocouple, and a C thermocouple electrically connected to the control board 42. The three thermocouples 31 can accurately measure and reflect the temperature. The three thermocouples 31 are preferably normal K-type armored thermocouples. The outputs of the three thermocouples 31 are all connected to the control board 42. These three thermocouples are installed at different positions on the circumference of the heating tube 3 and are directly connected to the temperature acquisition ports AI1, AI2, and AI3.

[0021] In this embodiment, the A power line is connected to the commutation module 41, the commutation module 41 is connected to one end of the heating coil 32, and the other end of the heating coil 32 is connected to the B power line. When the commutation module 41 is turned on, current passes through the heating coil 32.

[0022] In this embodiment, a conventional variable resistor is preferably used to make the temperature setting knob 43, and the output of the temperature setting knob 43 is connected to the AI4 on the control board 42.

[0023] The indicator light 44 described in this embodiment preferably uses an LED two-color light-emitting diode, and the two colors are eye-catching red and green.

[0024] For the convenience of operation and observation, the indicator light 44, the start button 45, and the end button 46 are respectively arranged at the upper part of the conveying tube 5 and are encapsulated with a transparent outer cover.

[0025] When the start button 45 is turned on, the control board 42 first reads the value of the temperature setting knob 43, then sums and averages the outputs of the A thermocouple, B thermocouple, and C thermocouple. It determines whether the heating temperature has been reached based on the average value. If it is greater than or equal to the set temperature, the indicator light 44 outputs green, and at the same time, the IO4 port of the control board 42 sends a power-on signal, and the converter module 41 performs the action of turning on the heating power supply; if it is less than the set temperature, the indicator light 44 outputs red, and at the same time, the IO4 port of the control board 42 sends a power-off signal, and the converter module 41 performs the action of turning off the heating power supply.

[0026] The working process of the present utility model is as follows:

[0027] (1) The welding operator turns on the power supply and picks up the welding torch.

[0028] (2) Adjust the temperature setting knob 43.

[0029] (3) Press the start button 45 to start the operation.

[0030] (4) When the set temperature is reached, the indicator light 44 shows a constant green light.

[0031] (5) When the set temperature is not reached, the indicator light 44 shows a constant red light.

[0032] (6) When the indicator light 44 shows a constant green light, the welding operator can perform other welding operations.

[0033] (7) The welding operator adjusts the intensity or rhythm of the wire heating operation by observing the indicator light 44.

[0034] (8) After the operation is completed, press the end button 46 to cut off the heating power supply.

[0035] The above embodiments only illustratively explain the principle and efficacy of the present utility model creation, as well as some applied embodiments, rather than being used to limit the present utility model; it should be noted that for those of ordinary skill in the art, without departing from the creative concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. A self-heating wire welding gun, characterized in that: The invention comprises a tubular welding gun body, wherein a guide head (1), a heating tube (3) and a delivery tube (5) are arranged in sequence along the axial direction on the welding gun body, a wire feeding channel (2) is provided inside the welding gun body along the axis, a heating coil (32) is wound around the axis inside the tubular side wall of the heating tube (3), a controller (4) is arranged on the outer side wall of the delivery tube (5), the controller (4) is electrically connected to the heating coil (32), a welding wire (6) is inserted into the wire feeding channel (2) from one end of the delivery tube (5), the controller (4) controls the current change inside the heating coil (32) to heat the welding wire (6), and the preheated welding wire (6) is delivered from the end opening of the guide head (1).

2. The self-heating wire welding gun according to claim 1, characterized in that: One end of the heating coil (32) near the guide head (1) inside the heating tube (3) is connected to a thermocouple (31), and the other end of the heating coil (32) is connected to a power line (33), which passes through the inside of the side wall of the conveying tube (5).

3. The self-heating wire welding gun according to claim 1, characterized in that: The controller (4) is provided with a current conversion module (41) and a control board (42) for controlling current.

4. The self-heating wire welding gun according to claim 3, characterized in that: The control panel (42) is also connected to a temperature setting knob (43), an indicator light (44), a start button (45) and an end button (46).

5. The self-heating wire welding gun according to claim 4, characterized in that: The indicator light (44) is a two-color LED light emitting diode.

6. The self-heating wire welding gun according to claim 1, characterized in that: The guide head (1) is configured to be in an arc shape that bends downward.

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