Welding control device and control method

Abstract

The welding control device comprises a main cylinder, a containing cavity is formed in the main cylinder, the main cylinder comprises a first cylinder body, a second cylinder body and an end cover, the first cylinder body can move left and right, the inner wall of the first cylinder body is slidably connected with a sliding rod, the sliding rod comprises a sliding block, and the sliding block divides the containing cavity in the main cylinder into a first cavity body and a second cavity body; the first barrel is provided with a first channel and a second channel, the first channel is communicated with the first cavity, the second channel is communicated with the second cavity, and the first channel and the second channel are connected with a third valve body through air pipes; a second cylinder is fixedly installed on the first cylinder, the right end of the sliding rod extends out of the right end of the second cylinder, and an electrode is fixedly installed at the right end of the sliding rod. According to the welding control device and method, the welding quality is improved, and the service life of an electrode is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and more specifically, to a welding control device and a control method. Background Art

[0002] At present, during the continuous use of the electrode in electric welding, wear will occur. The main reason for the wear is the contact wear between the electrode and the workpiece. After wear, when the electrode reaches the original welding position, there will be a distance difference from the workpiece to be welded, which easily causes the phenomenon that the electrode cannot contact the workpiece to be welded. Therefore, it is necessary to regularly check the wear condition of the electrode to avoid a great impact on the product quality. However, this inspection method cannot guarantee the welding quality in real time, and there are deficiencies. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a welding control device and a control method to improve the welding quality and the service life of the electrode.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A welding control device includes a main cylinder. There is a cavity inside the main cylinder. The main cylinder includes a first cylinder body, a second cylinder body, and an end cover. The first cylinder body can move left and right. A sliding rod is slidably connected to the inner wall of the first cylinder body. The sliding rod includes a slider. The slider divides the cavity inside the main cylinder into a first cavity and a second cavity. The first cylinder body is provided with a first channel and a second channel. The first channel communicates with the first cavity, and the second channel communicates with the second cavity. The first channel and the second channel are connected to a third valve body through an air pipe; The second cylinder body is fixedly installed on the first cylinder body. The right end of the sliding rod extends out of the right end of the second cylinder body, and an electrode is fixedly installed at the right end of the sliding rod; An end cover is installed on the first cylinder body, and a first valve body is installed on the end cover. The first valve body is a one-way valve, and the fluid inlet end of the first valve body communicates with the first cavity; An elastic member is installed on the inner wall of the second cylinder body. The elastic member is located on the right side of the slider. When the slider is at the right extreme position inside the main cylinder, the right end face of the slider abuts against the left end face of the elastic member. The second channel remains in communication with the second cavity, the first channel is disconnected from the second channel, and the second channel communicates with the outside atmosphere. The air pressure in the first cavity is greater than the air pressure in the second cavity, and the air pressure in the first cavity reaches the critical opening pressure of the first valve body.

[0005] The present invention is further provided that the outer peripheral wall of the slider is in clearance fit with the inner peripheral wall of the first cylinder body.

[0006] The present invention is further provided that the elastic member is a sponge pad.

[0007] The present invention is further provided that the end cover is provided with a first orifice, the first orifice communicates with the first cavity, and the first orifice is externally connected to an air intake device.

[0008] The present invention is further configured such that when the slider is at the extreme right position within the main cylinder, the slider compresses the elastic member of the second cylinder, and the compression direction of the elastic member is along the moving direction of the slider.

[0009] The present invention is further configured such that when the slider moves leftward from the extreme right position within the main cylinder, when the air pressure in the first chamber is greater than the starting pressure of the first valve body, the first valve body discharges the gas in the first chamber to the outside.

[0010] The present invention is further configured such that when the slider moves leftward from the extreme right position within the main cylinder, the first passage and the second passage are connected through the third valve body to balance the air pressures in the first chamber and the second chamber.

[0011] The present invention is further configured such that after the slider starts to move leftward from the extreme right position within the main cylinder, the first passage and the second passage are disconnected through the third valve body.

[0012] The present invention adopts the following technical solution: A control method for a welding control device, where the electrode is used to weld a welding component I, and the method includes the following steps:

[0013] ① Air enters the first chamber, the second passage is connected to the outside atmosphere through the third valve body, a pressure difference is formed on both sides of the slider, the slider moves to the extreme right position within the main cylinder, and the slider abuts against and compresses the elastic member;

[0014] ② Air intake into the first chamber stops, the main cylinder moves to the right, the electrode approaches the welding component I, the first passage and the second passage are connected, and the air pressures in the first chamber and the second chamber are balanced;

[0015] ③ The main cylinder continues to move to the right, the electrode abuts against the welding component I, and the force generated by the welding component I on the electrode causes the slider to slide to the left;

[0016] ④ The slider continues to slide to the left, the first passage and the second passage are disconnected through the third valve body, and as the slider continues to slide to the left, the air pressure in the first chamber increases, thereby slowing down the movement of the slider;

[0017] ⑤ The main cylinder stops moving, the slider stops moving, and under the air pressure in the first chamber, the welding component I and the electrode remain in contact.

[0018] In summary, the present invention has the following beneficial effects:

[0019] 1. By controlling the movement of the electrode, the electrode and the welding component I maintain the same acting force each time they abut, improving the welding quality. At the same time, it avoids the phenomenon that the electrode and the welding component I cannot come into contact due to electrode wear, reduces welding rejects, and improves the yield.

[0020] 2. When the slider starts to move, it needs to overcome the static friction. The elastic force of the elastic component provides a driving force for the slider to start moving, reducing the acting force between the first welding component and the electrode, reducing the wear of the electrode, and improving the service life of the electrode. Description of the Drawings

[0021] Figure 1 Schematic cross-sectional view of the embodiment Figure 1 ;

[0022] Figure 2 is Figure 1 the enlarged view of part A in

[0023] Figure 3 is Figure 2 the schematic cross-sectional view in the N-N direction of

[0024] Figure 4 Schematic cross-sectional view of the embodiment Figure 2 .

[0025] Reference Numerals: First cylinder 1, First cavity 11, Second cavity 12, First channel 13, Second channel 14, Extension channel 141, First inductor 15, Second inductor 16, Second cylinder 2, Elastic component 21, End cover 3, First pore 31, Second pore 32, Driving component 4, First valve body 41, Flow stabilizer 42, Second valve body 43, Third valve body 5, Slide bar 6, Slider 61, Extension block 62, Groove 621, Cushion layer 622, Collar 7, Fastener 71, Bottom sleeve 711, Electrode 8, End 81, First welding component 9, Second welding component 91. Detailed Embodiment

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] As Figures 1 - 4 shown, this embodiment discloses a welding control device, including a main cylinder. A cavity is provided inside the main cylinder. The main cylinder includes a first cylinder 1, a second cylinder 2, and an end cover 3. The first cylinder 1 is a cylindrical structure, and both ends of the first cylinder 1 in the axial direction are through. The left end of the first cylinder 1 is fixedly installed with the end cover 3, and the end cover 3 closes the left-end opening of the first cylinder 1. The right end of the first cylinder 1 is fixedly installed with the second cylinder 2, and the second cylinder 2 closes the right-end opening of the first cylinder 1. The second cylinder 2 is a cylindrical structure, with an opening at the left end and a closed right end. The left-end opening of the second cylinder 2 is butted against the right-end opening of the first cylinder 1.

[0028] AsFigure 1 As shown, the first cylinder 1 and the second cylinder 2 are coaxial, and the inner diameter of the second cylinder 2 is larger than that of the first cylinder 1. An elastic member 21 is installed on the inner wall of the second cylinder 2. The elastic member 21 is annular, and the elastic member 21 is a sponge pad with a large number of small holes inside. The elastic member 21 is arranged coaxially with the second cylinder 2.

[0029] The first cylinder 1 can move left and right. Specifically, a driving member 4 is installed at the left end of the end cap 3. The driving member 4 is an electric cylinder, and the output end of the driving member 4 is fixed to the left end of the end cap 3.

[0030] A sliding rod 6 is slidably connected to the inner wall of the first cylinder 1. The sliding rod 6 passes through the second cylinder 2 and the elastic member 21. There is a clearance fit between the second cylinder 2 and the sliding rod 6, and the right end of the sliding rod 6 extends out of the right end of the second cylinder 2. The sliding rod 6 includes a slider 61, and there is a clearance fit between the outer peripheral wall of the slider 61 and the inner peripheral wall of the first cylinder 1.

[0031] The slider 61 divides the cavity in the main cylinder to form a first cavity 11 and a second cavity 12, which are located on the left and right sides of the slider 61 respectively. Among them, the area sizes of the first cavity 11 and the second cavity 12 change as the slider 61 moves left and right. The first cavity 11 is formed by being surrounded by the first cylinder 1, the slider 61, and the end cap 3, and the second cavity 12 is formed by being surrounded by the slider 61, the first cylinder 1, and the second cylinder 2.

[0032] The first cylinder 1 is provided with a first channel 13 and a second channel 14. The first channel 13 and the second channel 14 respectively penetrate through the top of the first cylinder 1. The first channel 13 is communicated with the first cavity 11, and the second channel 14 is communicated with the second cavity 12. The second channel 14 includes an extension channel 141, and the extension channel 141 is horizontally arranged axially. The right side of the extension channel 141 axially penetrates through the right end face of the first cylinder 1 and is communicated with the second cavity 12. The first channel 13 and the second channel 14 are connected to a third valve body 5 through an air pipe. The third valve body 5 is a solenoid valve. By controlling the third valve body 5, the first channel 13 and the second channel 14 can be disconnected or connected, and the second channel 14 can also be directly communicated with the outside, so as to discharge the gas in the second cavity 12 from the second channel 14 to the outside atmosphere.

[0033] As Figure 1 shown, the end cap 3 is provided with a first orifice 31, and the first orifice 31 is communicated with the first cavity 11. The first orifice 31 is externally connected with a second valve body 43 and a flow stabilizer 42 in sequence through an air pipe. The second valve body 43 is externally connected with an air inlet device. The gas is controlled to enter the first cavity 11 through the second valve body 43, and the air pressure of the gas entering the first cavity 11 is controlled through the flow stabilizer 42.

[0034] The end cap 3 is also provided with a second channel 32, and a first valve body 41 is installed in the second channel 32. The first valve body 41 is a one-way valve, and the fluid inlet end of the first valve body 41 communicates with the first cavity 11. When the air pressure in the first cavity 11 is higher than the opening pressure of the first valve body 41, the gas in the first cavity 11 is discharged to the outside from the first valve body 41.

[0035] As Figure 1 shown, an electrode 8 is fixedly installed at the right end of the sliding rod 6. Specifically, the sliding rod 6 includes an extension block 62 at the right end. As Figure 3 shown, a groove 621 is provided at the upper end of the extension block 62, and a cushion layer 622 is installed in the groove 621. The cushion layer 622 is an insulating pad. As Figure 2 shown, a collar 7 is installed on the sliding rod 6, a fastener 71 is installed on the collar 7, and a bottom sleeve 711 is installed at the bottom of the fastener 71. The bottom sleeve 711 is an insulating sleeve. The electrode 8 is placed on the upper end of the cushion layer 622, the left end of the electrode 8 abuts against the cushion layer 622, and the upper end of the electrode 8 is pressed by the fastener 71. As Figure 1 、 Figure 2 shown, the electrodes 8 are arranged in pairs. After the first welding component 9 and the second welding component 91 are abutted, they are placed between the left and right electrodes 8, and the welding points are welded by the electrodes 8. The left and right electrodes 8 are respectively controlled by their respective welding control devices.

[0036] As Figure 4 shown, the elastic member 21 is located on the right side of the slider 61. When the slider 61 is at the right extreme position of the main cylinder, the right end face of the slider 61 abuts against the left end face of the elastic member 21. The second channel 14 remains in communication with the second cavity 12, the first channel 13 is disconnected from the second channel 14, and the second channel 14 is in communication with the outside atmosphere. The air pressure in the first cavity 11 is greater than the air pressure in the second cavity 12, and the air pressure in the first cavity 11 reaches the critical opening pressure of the first valve body 41. The slider 61 moves to the right by the air pressure difference between the first cavity 11 and the second cavity 12.

[0037] When the slider 61 is at the right extreme position of the main cylinder, the slider 61 and the second cylinder body 2 compress the elastic member 21, and the compression direction of the elastic member 21 is along the moving direction of the slider 61. In the state where the slider 61 is at the right extreme position of the main cylinder, the first cylinder body 1 moves to the right. The electrode 8 includes an end portion 81. After the end portion 81 abuts against the first welding component 9, the first cylinder body 1 continues to approach the first welding component 9. At this time, the slider 61 slides to the left along the inner wall of the first cylinder body 1. Since the slider 61 needs to overcome the static friction force when starting to move, the elastic force of the elastic member 21 provides a driving force for the slider 61 to start moving, reduces the acting force between the first welding component 9 and the end portion 81, and reduces the wear of the end portion 81.

[0038] When the slider 61 moves leftward along the inner wall of the first cylinder 1 from the extreme right position of the main cylinder, when the air pressure in the first cavity 11 is greater than the starting pressure of the first valve body 41, the first valve body 41 discharges the gas in the first cavity 11 to the outside, so as to prevent the pressure on the slider 61 from increasing after the first cavity 11 is compressed, which may cause the acting force between the first welding component 9 and the end 81 to increase, thereby reducing the wear of the end 81.

[0039] When the slider 61 moves leftward from the extreme right position of the main cylinder, the first channel 13 and the second channel 14 are connected through the third valve body 5. Since the elastic component 21 is a sponge, the gas in the first cavity 11 can enter the elastic component 21 and form a pressure on the right end face of the slider 61. The air pressure in the first cavity 11 and the second cavity 12 reaches an air pressure balance, thereby reducing the pressure difference between the left and right sides of the slider 61. The acting force between the first welding component 9 and the end 81 only needs to provide a sliding friction resistance to the sliding rod 6 to realize the movement of the sliding rod 6, further reducing the acting force between the first welding component 9 and the end 81, thereby reducing the wear of the end 81 and extending the service life.

[0040] After the slider 61 starts to move leftward from the extreme right position of the main cylinder, the first channel 13 and the second channel 14 are disconnected through the third valve body 5. As the slider 61 continues to move leftward, a pressure difference is generated between the first cavity 11 and the second cavity 12, thereby slowing down the moving speed of the slider 61. When the first cylinder 1 stops moving, the slider 61 also stops moving immediately. At this time, the air pressure in the first cavity 11 remains at the opening critical value of the first valve body 41. By replacing the first valve body 41 and adjusting its opening critical air pressure, the air pressure in the first cavity 11 can be adjusted, thereby controlling the acting force between the first welding component 9 and the end 81 and achieving the effect of reducing the wear between the two.

[0041] A first sensor 15 and a second sensor 16 are installed at the bottom of the first cylinder 1 to sense the position of the slider 61. The first sensor 15 is located on the left side of the second sensor 16. During the process when the slider 61 is at the extreme right position of the main cylinder, after the second sensor 16 senses the slider 61, as the slider 61 continues to move, the slider 61 leaves the sensing position of the second sensor 16. After the slider 61 starts to move leftward from the extreme right position of the main cylinder, the slider 61 immediately enters the sensing position of the second sensor 16.

[0042] A control method for controlling the above welding control device, and the specific steps are as follows:

[0043] ① Air enters the first cavity 11, the second channel 14 is communicated with the outside atmosphere through the third valve body 5, a pressure difference is formed on the left and right sides of the slider 61, the slider 61 moves to the extreme position in the main cylinder on the right side, the slider 61 abuts against and compresses the elastic component 21, and the second sensor 16 senses the slider 61. At this time, the air pressure in the first cavity 11 is the critical air pressure value for the opening of the first valve body 41.

[0044] ② Close the second valve body 43, stop the intake of air in the first cavity 11, the main cylinder moves to the right, the end 81 of the electrode 8 approaches the first welding component 9, and the first welding component 9 is fixed by the fixing device. The first channel 13 and the second channel 14 are communicated through the third valve body 5.

[0045] ③ The main cylinder continues to move to the right, the first welding component 9 abuts against the end 81, and the force generated by the first welding component 9 on the end 81 causes the slider 61 to slide to the left. Since the first channel 13 and the second channel 14 are communicated through the third valve body 5, the first cavity 11 and the second cavity 12 form a pressure balance, thereby reducing the pressure difference between the left and right sides of the slider 61, reducing the force between the first welding component 9 and the end 81, and thus reducing the wear of the end 81 and extending the service life.

[0046] ④ The slider 61 slides to the left and leaves the sensing position of the second inductor 16 and reaches the sensing position of the first inductor 15. The first channel 13 and the second channel 14 are disconnected through the third valve body 5. As the slider 61 continues to slide to the left, the air pressure in the first cavity 11 increases, thereby slowing down the movement of the slider 61.

[0047] ⑤ The main cylinder stops moving, the slider 61 stops moving, and under the action of the air pressure in the first cavity 11, the slider 61 ensures that the force between the first welding component 9 and the end 81 is consistent during each welding, improving the welding quality.

[0048] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and modifications made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A welding control device, characterized in that, It includes a main cylinder. There is a cavity inside the main cylinder. The main cylinder includes a first cylinder body (1), a second cylinder body (2), and an end cover (3). The first cylinder body (1) can move left and right. A sliding rod (6) is slidably connected to the inner wall of the first cylinder body (1). The sliding rod (6) includes a slider (61). The slider (61) divides the cavity inside the main cylinder into a first cavity (11) and a second cavity (12). The first cylinder body (1) is provided with a first channel (13) and a second channel (14). The first channel (13) communicates with the first cavity (11), and the second channel (14) communicates with the second cavity (12). The first channel (13) and the second channel (14) are connected to a third valve body (5) through an air pipe. The second cylinder body (2) is fixedly installed on the first cylinder body (1). The right end of the sliding rod (6) extends out of the right end of the second cylinder body (2). An electrode (8) is fixedly installed at the right end of the sliding rod (6). The end cover (3) is installed on the first cylinder body (1). A first valve body (41) is installed on the end cover (3). The first valve body (41) is a one-way valve. The fluid inlet end of the first valve body (41) communicates with the first cavity (11). An elastic member (21) is installed on the inner wall of the second cylinder body (2). The elastic member (21) is located on the right side of the slider (61). When the slider (61) is at the right extreme position inside the main cylinder, the right end face of the slider (61) abuts against the left end face of the elastic member (21). The second channel (14) remains in communication with the second cavity (12). The first channel (13) is disconnected from the second channel (14), and the second channel (14) communicates with the outside atmosphere. The air pressure in the first cavity (11) is greater than the air pressure in the second cavity (12). The air pressure in the first cavity (11) reaches the critical opening pressure of the first valve body (41).

2. The welding control device according to claim 1, characterized in that, There is a clearance fit between the outer peripheral wall of the slider (61) and the inner peripheral wall of the first cylinder body (1).

3. A welding control device according to claim 1, characterized in that The elastic member (21) is a sponge pad.

4. A welding control device according to claim 1, characterized in that, The end cover (3) is provided with a first orifice (31). The first orifice (31) communicates with the first cavity (11). The first orifice (31) is externally connected to an air intake device.

5. A welding control device according to claim 1, characterized in that, When the slider (61) is at the right extreme position inside the main cylinder, the slider (61) and the second cylinder body (2) compress the elastic member (21). The compression direction of the elastic member (21) is along the moving direction of the slider (61).

6. A welding control device according to claim 1, characterized in that, When the slider (61) moves leftward from the right extreme position inside the main cylinder, when the air pressure in the first cavity (11) is greater than the starting pressure of the first valve body (41), the first valve body (41) discharges the gas in the first cavity (11) to the outside.

7. A welding control device according to claim 1, characterized in that, When the slider (61) moves leftward from the right extreme position inside the main cylinder, the first channel (13) and the second channel (14) are connected through the third valve body (5) to balance the air pressures in the first cavity (11) and the second cavity (12).

8. A welding control device according to claim 1, wherein, After the slider (61) moves leftward from the extreme right position inside the main cylinder, the first channel (13) and the second channel (14) are disconnected through the third valve body (5).

9. A control method for the welding control device according to any one of claims 1-8, wherein the electrode (8) is used to weld the first welding component (9), and is characterized in that The steps include: ① Air enters the first cavity (11), the second channel (14) is communicated with the outside atmosphere through the third valve body (5), a pressure difference is formed on both the left and right sides of the slider (61), the slider (61) moves to the extreme position inside the main cylinder to the right, and the slider (61) abuts against and compresses the elastic component (21); ② The air intake in the first cavity (11) stops, the main cylinder moves to the right, the electrode (8) approaches the first welding component (9), the first channel (13) and the second channel (14) are communicated, and the first cavity (11) and the second cavity (12) form a pressure balance; ③ The main cylinder continues to move to the right, the electrode (8) abuts against the first welding component (9), and the force generated by the first welding component (9) on the electrode (8) causes the slider (61) to slide to the left; ④ The slider (61) continues to slide to the left, the first channel (13) and the second channel (14) are disconnected through the third valve body (5), and as the slider (61) continues to slide to the left, the air pressure in the first cavity (11) increases, thereby slowing down the movement of the slider (61); ⑤ The main cylinder stops moving, the slider (61) stops moving, and under the action of the air pressure in the first cavity (11), the first welding component (9) and the electrode (8) remain in contact with each other.

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