Welding robot wire feeding quality measuring device

Abstract

The utility model discloses a welding robot wire feeding quality measuring device which comprises a fixing plate, a driving wheel, a driving wire feeding wheel, a pressing wheel and a photoelectric encoder, the driving wheel and the driving wire feeding wheel are both installed on the fixing plate in a rotating mode, the driving wheel is in driving connection with the driving wire feeding wheel, and the pressing wheel is tightly pressed on the driving wire feeding wheel. A welding wire penetrates between the pressing wheel and the driving wire feeding wheel, the photoelectric encoder is arranged on one side of the driving wire feeding wheel, a power input shaft of the photoelectric encoder is coaxially and fixedly connected with the driving wire feeding wheel, the driving wire feeding wheel drives the photoelectric encoder to move synchronously, and the photoelectric encoder is in communication connection with the data acquisition card. The photoelectric encoder and the driving wire feeding wheel are directly and coaxially connected through the coupler, and the driving wire feeding wheel is a power wheel for driving the welding wire and has an automatic rotation function, so that welding wire measurement errors caused by the clamping problem of the welding wire are effectively avoided, and the measurement precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding wire feeding measurement, in particular to a device for measuring the quality of wire feeding of a welding robot. Background Art

[0002] During automated welding, wire feeding is performed automatically via a wire feeding device to achieve automated welding. In the prior art, welding wire measurement is typically performed by installing additional measuring components, such as a measuring wheel in contact with the welding wire, which is then pressed against the measuring wheel by a pressure wheel. This wheel rotates as the welding wire moves forward, achieving measurement. Because the measuring wheel moves passively, the pressure between the pressure wheel and the measuring wheel directly affects measurement accuracy. Too little pressure can cause relative slippage between the welding wire and the measuring wheel, while too much pressure can cause the measuring wheel to rotate poorly, both of which can lead to measurement errors. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to provide a welding robot wire feeding quality measuring device which is conducive to improving measurement accuracy.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: A welding robot wire feeding quality measuring device, comprising a fixed plate, a driving wheel, an active wire feeding wheel, a pressure wheel and a photoelectric encoder, wherein the driving wheel and the active wire feeding wheel are both rotatably mounted on the fixed plate, the driving wheel and the active wire feeding wheel are driven and connected, the pressure wheel is pressed against the active wire feeding wheel, and the welding wire passes between the pressure wheel and the active wire feeding wheel, the photoelectric encoder is arranged on one side of the active wire feeding wheel, the power input shaft of the photoelectric encoder is coaxially and fixedly connected to the active wire feeding wheel, the active wire feeding wheel drives the photoelectric encoder to move synchronously, and the photoelectric encoder is communicatively connected to a data acquisition card.

[0005] In the above-mentioned welding robot wire feeding quality measuring device, a coupling is coaxially fixedly connected to the input shaft of the photoelectric encoder, a connecting shaft is coaxially extended outward on the side wall of the active wire feeding wheel, and the other end of the coupling is coaxially fixedly connected to the connecting shaft.

[0006] In the above-mentioned device for measuring the wire feeding quality of a welding robot, planes are provided on the circumferential surface of the input shaft of the photoelectric encoder and on the circumferential surface of the connecting shaft on the side wall of the active wire feeding wheel. One end of the coupling is sleeved on the input shaft of the photoelectric encoder, and the other end of the coupling is sleeved on the connecting shaft on the side wall of the active wire feeding wheel. A screw is installed on the coupling at a position corresponding to the plane, and the end of the screw is pressed against the plane.

[0007] In the above-mentioned device for measuring the wire feeding quality of a welding robot, a support plate is fixedly connected to the fixed plate, and the support plate is fixedly connected to the photoelectric encoder through screws.

[0008] In the above-mentioned welding robot wire feeding quality measuring device, a fixing rod is fixedly connected to the side wall of the fixing plate, a threaded hole is opened on the end of the fixing rod, and the support plate is fixedly connected to the end of the fixing rod by screws.

[0009] In the above-mentioned device for measuring the wire feeding quality of a welding robot, teeth are provided on the outer circumferential surface of the driving wheel and the outer circumferential surface of the active wire feeding wheel, and the driving wheel and the active wire feeding wheel are connected through tooth transmission; teeth are also provided on the outer circumferential surface of the pressure wheel, and the active wire feeding wheel and the pressure wheel are connected through tooth transmission.

[0010] The above-mentioned welding robot wire feeding quality measuring device has a hinged plate hinged on one side of the fixed plate, the pressure wheel is rotatably installed on the middle part of the hinged plate, and an adjusting bolt is provided on the fixed plate, and the end of the adjusting bolt is pressed tightly on the free end of the hinged plate.

[0011] In the above-mentioned device for measuring wire feeding quality of a welding robot, a driving motor is fixedly connected to the side wall of the fixed plate, and the driving motor is drivingly connected to the driving wheel.

[0012] In the above-mentioned device for measuring wire feeding quality of a welding robot, the fixing plate is fixedly installed in the shell, and the data acquisition card is also fixedly installed in the shell.

[0013] In the above-mentioned device for measuring wire feeding quality of a welding robot, a wire reel is further installed in the housing, and one end of the welding wire wound on the wire reel enters between the pressure wheel and the hinge plate.

[0014] The technical solution of the utility model has achieved the following beneficial technical effects:

[0015] 1. By setting a coupling, the photoelectric encoder and the active wire feeding wheel are directly coaxially connected. The active wire feeding wheel is the power wheel that drives the welding wire and has the function of autonomous rotation. It effectively avoids the welding wire measurement error caused by the clamping problem of the welding wire and improves the measurement accuracy.

[0016] 2. By integrating the photoelectric encoder with the active wire feeding wheel, synchronous measurement can be achieved while feeding the wire. There is no need to set up additional measuring wheels and pressure wheels, which simplifies the equipment and makes the whole more compact and portable.

[0017] 2. The setting of coupling and support plate facilitates the quick disassembly and assembly of the photoelectric encoder, making it easier to carry out maintenance later. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the front cross-sectional structure of the present invention;

[0019] Figure 2 A schematic side cross-sectional structural diagram of the connection between the active wire feeding wheel and the pressure wheel in the utility model.

[0020] The reference numerals in the figure are as follows: 1-housing; 2-wire reel; 3-fixed plate; 4-driving motor; 5-driving wheel; 6-active wire feeding wheel; 7-pressure wheel; 8-hinge plate; 9-adjusting bolt; 10-support plate; 11-photoelectric encoder; 12-coupling; 13-data acquisition card; 14-fixed rod. DETAILED DESCRIPTION

[0021] In this embodiment, a device for measuring the wire feeding quality of a welding robot is provided. Figure 1-2 As shown, it includes a fixed plate 3, a driving wheel 5, an active wire feeding wheel 6, a pressure wheel 7 and a photoelectric encoder 11. The driving wheel 5 and the active wire feeding wheel 6 are both rotatably mounted on the fixed plate 3. The driving wheel 5 and the active wire feeding wheel 6 are driven and connected. The outer circumferential surfaces of the driving wheel 5 and the outer circumferential surfaces of the active wire feeding wheel 6 are both provided with teeth. The driving wheel 5 and the active wire feeding wheel 6 are connected through tooth transmission. The outer circumferential surface of the pressure wheel 7 is also provided with teeth. The active wire feeding wheel 6 and the pressure wheel 7 are connected through tooth transmission. A driving motor 4 is fixedly connected to the side wall of the fixed plate 3, and the driving motor 4 is connected to the driving wheel 5 in a transmission manner. The pressure wheel 7 is pressed tightly on the active wire feeding wheel 6, and the welding wire passes between the pressure wheel 7 and the active wire feeding wheel 6. The photoelectric encoder 1 1 is arranged on one side of the active wire feeding wheel 6, the power input shaft of the photoelectric encoder 11 is coaxially fixedly connected to the active wire feeding wheel 6, the active wire feeding wheel 6 drives the photoelectric encoder 11 to move synchronously, and the photoelectric encoder 11 is communicatively connected with the data acquisition card 13; the fixed plate 3 is fixedly installed in the shell 1, and the data acquisition card 13 is also fixedly installed in the shell 1. A wire reel 2 is also installed in the shell 1, and one end of the welding wire wound on the wire reel 2 enters between the pressure wheel 7 and the hinge plate 8. By setting a coupling 12, the photoelectric encoder 11 and the active wire feeding wheel 6 are directly coaxially connected, and the active wire feeding wheel 6 is a power wheel that drives the welding wire and has the function of autonomous rotation, which effectively avoids the welding wire measurement error caused by the clamping problem of the welding wire, thereby improving the measurement accuracy.

[0022] like Figure 2As shown, a coupling 12 is coaxially fixedly connected to the input shaft of the photoelectric encoder 11, and a connecting shaft is coaxially extended outward on the side wall of the active wire feeding wheel 6. The other end of the coupling 12 is coaxially fixedly connected to the connecting shaft, and planes are provided on the circumferential surface of the input shaft of the photoelectric encoder 11 and the circumferential surface of the connecting shaft on the side wall of the active wire feeding wheel 6. One end of the coupling 12 is sleeved on the input shaft of the photoelectric encoder 11, and the other end of the coupling 12 is sleeved on the connecting shaft on the side wall of the active wire feeding wheel 6. A screw is installed on the coupling 12 at a position corresponding to the plane, and the end of the screw is pressed on the plane. By integrating the photoelectric encoder 11 with the active wire feeding wheel 6, synchronous measurement can be achieved while feeding the wire, without the need to set up additional measuring wheels and pressure wheels, thereby simplifying the equipment and making the overall device more compact and portable.

[0023] like Figure 2 As shown, a support plate 10 is fixedly connected to the fixing plate 3, and the support plate 10 is fixedly connected to the photoelectric encoder 11 by screws; a fixing rod 14 is fixedly connected to the side wall of the fixing plate 3, and a threaded hole is provided on the end of the fixing rod 14, and the support plate 10 is fixedly connected to the end of the fixing rod 14 by screws. By setting the coupling 12 and the support plate 10, it is convenient to quickly disassemble and assemble the photoelectric encoder 11, which is convenient for subsequent maintenance.

[0024] like Figure 1 As shown, a hinge plate 8 is hinged on one side of the fixed plate 3, and the pressure wheel 7 is rotatably mounted on the middle part of the hinge plate 8. An adjusting bolt 9 is provided on the fixed plate 3, and the end of the adjusting bolt 9 is pressed tightly on the free end of the hinge plate 8. By setting the hinge plate 8 and the adjusting bolt 9, the degree of downward pressure of the hinge plate 8 can be controlled, thereby adjusting the degree of pressure of the pressure wheel 7 on the welding wire.

[0025] The principle of measuring the welding wire quality is as follows: the active wire feed wheel 6 synchronously drives the photoelectric encoder 11 to rotate. The photoelectric encoder 11 sends a pulse signal, sending 100 pulses per rotation. The total number of pulses received is counted by the digital port of the data acquisition card 13 and recorded as M. At the same time, the time interval between two pulses is recorded as t. The instantaneous wire feed speed can be obtained by dividing the wire feed length between two pulses by the pulse interval time, v = 2πR / 100t;

[0026] Through measurement and calculation, we can know the wire feeding length between each two pulses. The radius of the active wire feeding wheel 6 is recorded as R, and the wire feeding length between two pulses is 2πR / 100;

[0027] The total number of pulses M during the entire welding process and the number of revolutions r of the active wire feeding wheel 6 are counted by the data acquisition card 13, where r=M / 100, and the total length of wire feeding is L, where L=M / 100*2πR;

[0028] When the welding wire is considered to be a cylinder with uniform texture, the wire feeding mass m is calculated by the cylinder volume formula and the mass calculation formula, m = ρ*L*π*a*a, ρ is the welding wire density, and the welding wire radius is a.

[0029] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the claims of this patent application.

Claims

1. A welding robot wire feeding quality measuring device, characterized in that: The invention comprises a fixed plate (3), a driving wheel (5), an active wire feeding wheel (6), a pressure wheel (7) and a photoelectric encoder (11); the driving wheel (5) and the active wire feeding wheel (6) are both rotatably mounted on the fixed plate (3); the driving wheel (5) and the active wire feeding wheel (6) are drivingly connected; the pressure wheel (7) is pressed against the active wire feeding wheel (6); the welding wire passes between the pressure wheel (7) and the active wire feeding wheel (6); the photoelectric encoder (11) is arranged on one side of the active wire feeding wheel (6); the power input shaft of the photoelectric encoder (11) and the active wire feeding wheel (6) are coaxially fixedly connected; the active wire feeding wheel (6) drives the photoelectric encoder (11) to move synchronously; and the photoelectric encoder (11) is communicatively connected to a data acquisition card (13).

2. A welding robot wire feeding quality measuring device according to claim 1, characterized in that: A coupling (12) is coaxially fixedly connected to the input shaft of the photoelectric encoder (11), a connecting shaft is coaxially extended outward on the side wall of the active wire feeding wheel (6), and the other end of the coupling (12) is coaxially fixedly connected to the connecting shaft.

3. A welding robot wire feeding quality measuring device according to claim 2, characterized in that: Planes are provided on the circumferential surface of the input shaft of the photoelectric encoder (11) and the circumferential surface of the connecting shaft on the side wall of the active wire feeding wheel (6); one end of the coupling (12) is sleeved on the input shaft of the photoelectric encoder (11), and the other end of the coupling (12) is sleeved on the connecting shaft on the side wall of the active wire feeding wheel (6); a screw is installed on the coupling (12) at a position corresponding to the plane, and the end of the screw is pressed against the plane.

4. The device for measuring wire feeding quality of a welding robot according to claim 1, characterized in that: A support plate (10) is fixedly connected to the fixing plate (3), and the support plate (10) is fixedly connected to the photoelectric encoder (11) via screws.

5. The device for measuring wire feeding quality of a welding robot according to claim 4, characterized in that: A fixing rod (14) is fixedly connected to the side wall of the fixing plate (3), a threaded hole is provided on the end of the fixing rod (14), and the support plate (10) is fixedly connected to the end of the fixing rod (14) by screws.

6. The device for measuring wire feeding quality of a welding robot according to claim 1, characterized in that: The outer circumferential surface of the driving wheel (5) and the outer circumferential surface of the active wire feeding wheel (6) are both provided with teeth, and the driving wheel (5) and the active wire feeding wheel (6) are connected through the teeth transmission; the outer circumferential surface of the pressure wheel (7) is also provided with teeth, and the active wire feeding wheel (6) and the pressure wheel (7) are connected through the teeth transmission.

7. The device for measuring wire feeding quality of a welding robot according to claim 1, characterized in that: A hinge plate (8) is hinged on one side of the fixed plate (3), and the pressure wheel (7) is rotatably mounted on the middle part of the hinge plate (8). An adjusting bolt (9) is provided on the fixed plate (3), and the end of the adjusting bolt (9) is pressed tightly on the free end of the hinge plate (8).

8. The device for measuring wire feeding quality of a welding robot according to claim 1, characterized in that: A driving motor (4) is fixedly connected to the side wall of the fixed plate (3), and the driving motor (4) is transmission-connected to the driving wheel (5).

9. The device for measuring wire feeding quality of a welding robot according to claim 1, characterized in that: The fixing plate (3) is fixedly installed in the housing (1), and the data acquisition card (13) is also fixedly installed in the housing (1).

10. The device for measuring wire feeding quality of a welding robot according to claim 9, characterized in that: A wire reel (2) is also installed in the housing (1), and one end of the welding wire wound on the wire reel (2) enters between the pressure wheel (7) and the hinge plate (8).

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