Welding gun capable of feeding back welding wire feeding speed

Abstract

The utility model relates to a welding gun capable of feeding back welding wire feeding speed, which comprises a tubular welding gun body, a wire feeding channel is arranged in the welding gun body along the central axis, the interior of the wire feeding channel is used for conveying welding wires, a handheld section is arranged in the middle of the welding gun body, and a controller is oppositely arranged at the top of the handheld section. Two opposite idler wheels abut against the two sides of the welding wire, and the controller feeds back the wire feeding speed of the welding wire by detecting the rotating speed of one idler wheel. The upper roller and the lower roller are driven to rotate through the feeding action of the welding wire, the dense grooves in the edge of the upper roller rotate, distance signals detected by the laser detection module are in a pulse form, the control panel calculates the feeding speed and the acceleration of the welding wire according to the pulse signals, and the feeding speed and the acceleration are transmitted to external equipment through the wireless transmission module. As a basis for adjusting welding parameters, the welding quality and the production efficiency are improved, the structure is simple, installation and operation are convenient, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a welding gun capable of feeding back a welding wire feeding speed. Background Art

[0002] Wire feeding is a very important part of the welding process. The wire feeding method of manual welding mostly uses the welder's fingers to twist the wire to complete the wire feeding process. It is very inconvenient for the welder to operate the wire feeding. Therefore, the manual wire feeding has poor accuracy, poor consistency, and unstable wire feeding, which leads to low welding production efficiency and poor welding forming consistency. Therefore, most welding occasions currently use automatic wire feeders, that is, an automatically driven mechanized wire feeding device, which is mainly used for automatic wire feeding in manual welding, automatic argon arc welding, automatic wire feeding in plasma welding, and automatic wire feeding in laser welding. The automatic wire feeder generally has a control part to provide parameter settings, the drive part drives the wire feeding under the control of the control part, and the wire feeding nozzle part sends the wire to the welding gun position. However, when the wire feeding channel is generally made of a hose, the wire feeding distance is uncertain. When the distance is longer, the friction between the wire and the tube wall is more, causing the wire to bend in the wire feeding tube, resulting in poor wire feeding accuracy, or even stuck, resulting in wire feeding failure. At this time, it is difficult to achieve high-precision wire feeding and wire drawing. When the welding wire bends in the wire feeding tube and the sliding resistance is too large, there will be an error in the feeding speed of the welding wire end. The current wire feeder cannot know the feeding speed of the welding wire at the end of the welding gun, which makes the actual welding parameters mismatched, directly affecting the weld formation. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a welding gun capable of feeding back the wire feeding speed of the welding wire, so as to solve the problem of the wire feeding speed in the welding process.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A welding gun capable of feeding back the wire feeding speed of a welding wire comprises a tubular welding gun body, a wire feeding channel is provided inside the welding gun body along the central axis, the inside of the wire feeding channel is used to transport the welding wire, the middle part of the welding gun body is provided as a hand-held section, a controller is provided opposite to the top of the hand-held section, two opposite rollers are abutted on both sides of the welding wire, and the controller feeds back the wire feeding speed of the welding wire by detecting the rotation speed of one roller.

[0006] As a preferred embodiment, the roller includes two relative upper rollers and a lower roller, the wheel surfaces of the upper roller and the lower roller are opposite and the axial direction is perpendicular to the axial direction of the wire feeding channel, and the relative distance between the upper roller and the lower roller can be adjusted so that the relative wheel surfaces of the upper roller and the lower roller abut against both sides of welding wires of different diameters.

[0007] As a preferred embodiment, the controller includes a control panel, a wireless transmission module and a laser detection module. The laser emitted by the laser detection module is directly facing the dense grooves on the circumference of the end face of one side of the upper roller. A display module and a switch button are also provided on the control panel.

[0008] As a preferred embodiment, two opposite detection holes are opened inside the handheld section, the upper roller and the lower roller are arranged in the detection holes, and springs are respectively abutted on two sides away from the central axis of the upper roller and the lower roller.

[0009] The beneficial effects of the utility model are as follows: the utility model drives the upper roller and the lower roller to rotate through the welding wire feeding action, and the dense grooves on the edge of the upper roller rotate, so that the distance signal detected by the laser detection module is in a pulse form. The control board calculates the welding wire feeding speed and acceleration according to the pulse signal, and transmits them to the external equipment through the wireless transmission module as a basis for adjusting the welding parameters, thereby improving the welding quality and production efficiency. The utility model has a simple structure, is easy to install, convenient to operate, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the structure of the utility model;

[0013] Figure 3 It is a schematic diagram of the structure of the utility model;

[0014] Figure 1~Figure 3 Explanation of the reference numerals in the accompanying drawings: 1. welding gun body; 2. wire feeding channel; 3. controller; 4. hand-held section; 5. welding wire; 6. control board; 7. wireless transmission module; 8. laser detection module; 9. detection hole; 10. upper roller; 11. lower roller; 12. spring; 101. dense grooves. DETAILED DESCRIPTION

[0015] The specific implementation scheme of the utility model is described in detail below in conjunction with the accompanying drawings.

[0016] like Figure 1~Figure 3The welding gun capable of feeding back the wire feeding speed shown comprises a welding gun body 1, a wire feeding channel 2, a controller 3, a handheld section 4, a welding wire 5, a control panel 6, a wireless transmission module 7, a laser detection module 8, a detection hole 9, an upper roller 10, a lower roller 11, a display module, and a switch button. The controller is arranged above the handheld section 4, a detection hole 9 is provided inside the handheld section 4, a fixed groove is provided inside the detection hole 9 for placing the upper roller 10 and the lower roller 11, and the control panel 6 and the laser detection module 8 are located above the detection hole 9, facing the edge of the roller. During welding, the feeding action of the welding wire drives the upper roller 10 and the lower roller 11 to rotate, and the distance signal detected by the laser detection module 8 when the dense grooves 101 on the edge of the upper roller rotate are in the form of pulses. The control panel 6 calculates the feeding speed and acceleration of the welding wire according to the pulse signal, and transmits them to the external device through the wireless transmission module 7, and displays the wire feeding speed through the display module.

[0017] In order to facilitate operation and observation, the controller 3 is enclosed in a transparent plastic cover.

[0018] like Figure 3 , the control board 6 is used as the core module, and the ATmega328P single-chip microcomputer module can be used. The module has the advantages of small size, rich interfaces, low power consumption, etc., and can meet the requirements of the utility model. The power supply of the entire control board 6 is powered by a 5V power supply, the wireless transmission module 7 is connected to the control board 6 through the serial port 1, the display module is connected to the control board 6 through the serial port 2, the switch button is connected to the control board 6 through the IO1 interface, the laser detection module 8 is connected to the control board 6 through AI1, the wireless transmission module 7 adopts the TTL serial port to wireless transceiver data transmission module LPD130E, the laser detection module 8 can adopt the HG-C1200 Panasonic laser displacement sensor, and the display module can choose a digital tube display module with a serial port.

[0019] According to the detection hole 9, a fixed groove is provided, and the central axes of the upper roller 10 and the lower roller 11 are respectively installed in the fixed groove, and the two sides of the central axes of the upper roller 10 and the lower roller 11 are tightly pressed by springs 12. In order to be able to adaptively compress the welding wire, the type of spring can be replaced to adjust the degree of compression of the welding wire. The contact surface between the upper roller 10 and the lower roller 11 and the welding wire 5 can be set to a groove shape or a smooth surface. When the welding wire is made of a harder material, a groove-shaped friction surface is selected, and when the welding wire is made of a softer material, a smooth surface is selected.

[0020] The control board 6 calculates the wire feeding speed and acceleration according to the pulse signal. Assuming that the radius of the dense groove 101 of the upper roller 10 is r, the number of the dense groove 101 is N, and there are n pulse signals in the unit sampling time t, the wire feeding speed V can be expressed as follows: V=2πrn / (tN)

[0021] Assume the velocity at the previous sampling moment is V0, and the velocity at the current sampling moment is V1, then the calculation method of acceleration a is as follows:

[0022] a=(V0-V1) / t

[0023] The working process of this utility model is:

[0024] (1) The welding operator picks up the welding gun and turns on the switch button.

[0025] (2) The system starts feeding wire.

[0026] (3) The laser detection module 8 detects the distance to the edge of the upper roller 10 and calculates the number of pulses.

[0027] (4) The control board 6 calculates the wire feeding speed V based on the radius r of the dense grooves 101 of the upper roller 10, the number N of the dense grooves 101, and the number of n pulse signals within the unit sampling time t.

[0028] (5) Calculate the wire feed acceleration a.

[0029] (6) The control board 6 sends the real-time welding wire feeding speed V and acceleration a to the external device through the wireless transmission module 7.

[0030] (6) The control board 6 displays the real-time wire feed speed V through the serial port 2.

[0031] (7) When the operation is completed, put down the welding torch and turn off the switch button.

[0032] The above embodiments are only illustrative of the principles and effects of the invention of the utility model, as well as some embodiments of its application, and are not intended to limit the invention of the utility model. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A welding gun capable of feeding back the wire feeding speed, characterized in that: The invention comprises a tubular welding gun body (1), wherein a wire feeding channel (2) is provided inside the welding gun body (1) along the central axis thereof, wherein the inside of the wire feeding channel (2) is used to feed welding wire (5), wherein a hand-held section (4) is arranged in the middle of the welding gun body (1), wherein a controller (3) is arranged opposite to the top of the hand-held section (4), wherein two rollers are arranged opposite to each other on both sides of the welding wire (5), and wherein the controller (3) feeds back the wire feeding speed of the welding wire (5) by detecting the rotation speed of one roller.

2. The welding gun capable of feeding back the wire feeding speed according to claim 1, characterized in that: The rollers include two opposing upper rollers (10) and a lower roller (11); the wheel surfaces of the upper roller (10) and the lower roller (11) are opposed to each other and their axes are perpendicular to the axis of the wire feeding channel (2); the relative distance between the upper roller (10) and the lower roller (11) is adjustable so that the opposing wheel surfaces of the upper roller (10) and the lower roller (11) abut against two sides of welding wires (5) of different diameters.

3. The welding gun capable of feeding back the wire feeding speed according to claim 1, characterized in that: The controller (3) comprises a control panel (6), a wireless transmission module (7) and a laser detection module (8). The laser emitted by the laser detection module (8) is directed toward the dense grooves (101) on the circumference of the end surface of one side of the upper roller (10). The control panel (6) is also provided with a display module and a switch button.

4. The welding gun capable of feeding back the wire feeding speed according to claim 1, characterized in that: Two opposing detection holes (9) are provided inside the handheld section (4), an upper roller (10) and a lower roller (11) are arranged in the detection holes (9), and springs (12) are respectively abutted on two sides of the central axes of the upper roller (10) and the lower roller (11) that are away from each other.

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