Automatic grinding and cap replacing all-in-one machine for welding electrode

Abstract

The utility model discloses an automatic grinding and cap replacing all-in-one machine for a welding electrode, which comprises a support frame, a driving gear box, a grinding mechanism and a cap replacing mechanism, and is characterized in that the top of the support frame is provided with a driving gear box; a driving motor; a cap replacing body and a grinding and shaping cutter body are installed at the top of the driving gear box, an air blowing nozzle is installed at the side line of the top of the driving gear box through a supporting plate, a pneumatic ejection clip is installed on the side of the top of the supporting frame, a second sensor is installed at the top of the pneumatic ejection clip, and a first sensor is arranged above the second sensor. By means of the arrangement mode that the cap replacing body and the grinding and shaping cutter body are matched, a grinding machine product is different from an existing electrode cutting, coping and cap replacing mode, a grinding process is adopted, grinding and shaping are achieved, a hard oxide layer on the surface of an electrode cap can be effectively removed through the shaping mode, higher shaping quality and precision are obtained, and the machining efficiency is improved. And meanwhile, the resistance of the electrode cap is reduced in the welding process, and the welding quality and stability are greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of cap-changing integrated machines, in particular to an automatic grinding and cap-changing integrated machine for welding electrodes. Background Art

[0002] At present, in the welding of high-strength galvanized sheets, copper, zinc, and high-strength sheet alloy elements will form a hard alloy oxide layer on the surface of the electrode cap, increasing the resistance of the electrode cap. The traditional process generally adopts the electrode cap milling method, that is, the electrode grinding machine, and grinds it once every 100-200 weldings to ensure the sustainability of welding. This method has a large amount of milling and grinding, resulting in a short life of the electrode cap. Generally, grinding 40-50 times will cause the electrode cap to be scrapped. In the actual welding process, there is still a thick alloy oxide layer on the surface of the electrode cap. In order to ensure the welding quality, the welding current setting has to be increased, so the spatter volume is relatively large and the stability of the welding quality is not high. Utility Model Content

[0003] The purpose of the utility model is to provide an all-in-one machine for automatic grinding and capping of welding electrodes to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a welding electrode automatic grinding and cap changing integrated machine, comprising:

[0005] A supporting frame, a driving gear box is installed on the top of the supporting frame;

[0006] A driving motor, wherein the driving motor is installed at one side of the driving gear box, and an output end of the driving motor is connected to the driving gear box;

[0007] A cap changing body and a grinding and shaping knife body are installed on the top of the driving gear box, the axis of the grinding and shaping knife body is parallel to the axis of the cap changing body and is on the same horizontal line, an air blowing nozzle is installed at the edge of the top of the driving gear box through a support plate, a pneumatic ejection clip is installed on the side of the top of the supporting frame, a second sensor is installed on the top of the pneumatic ejection clip, a first sensor is arranged obliquely above the second sensor, and the first sensor is connected to the top of the supporting frame through a bracket.

[0008] Preferably, a distribution box is installed on one side of the support frame, and an electrode collection box is installed on the other side of the support frame.

[0009] Preferably, an electrode discharge tube is installed on the electrode collecting box, and one end of the electrode discharge tube is connected to the cap replacement body.

[0010] Preferably, the grinding and shaping cutter body comprises:

[0011] A second gear, the second gear being rotatably disposed inside the driving gear box via a bearing;

[0012] A blade fixing cylinder, wherein the blade fixing cylinder is fixedly inserted and installed in the middle part of the second gear;

[0013] A grinding blade is installed inside the blade fixing cylinder.

[0014] Preferably, the cross section of the grinding blade is cross-shaped, and blades are provided on both sides of the grinding blade.

[0015] Preferably, the cap-changing body comprises:

[0016] A fixing seat, the fixing seat is fixedly embedded in the driving gear box;

[0017] The clamping assembly is arranged inside the fixing seat and is used to lock the electrode.

[0018] Preferably, the clamping assembly comprises:

[0019] A fixed plate, the fixed plate is fixedly installed inside the fixed seat;

[0020] A first gear, the first gear being rotatably disposed outside the fixed disk;

[0021] A clamping jaw, wherein a plurality of the clamping jaws are movably arranged between the fixed plates, and a clamping protrusion is arranged on the inner side surface of one end of the clamping jaw;

[0022] Positioning posts, a plurality of said positioning posts are fixedly connected between the fixed plates, and said positioning posts are rotatably interlaced with the middle of the clamping jaws;

[0023] A pushing block is connected to the outer side surface of the clamping claw, and a plurality of limiting grooves are arranged in a ring array on the inner side of the first gear, and the pushing block is movable and limited inside the limiting grooves.

[0024] Technical effects and advantages of the utility model:

[0025] The utility model utilizes the setting mode of matching the cap changing body and the grinding and shaping cutter body, and the electrode cap is slightly deformed under the squeezing action of the welding clamp and the rotating motion of the cutter, thereby forming a grinding and spinning action, thereby realizing the shaping operation of the end face of the electrode cap. The grinding machine product is different from the previous electrode cutting, grinding and cap changing mode, but adopts a grinding process to realize grinding and shaping. This shaping method can effectively remove the harder oxide layer on the surface of the electrode cap, obtain higher shaping quality and precision, and at the same time ensure that the electrode cap resistance is reduced during the welding process, ensure that the welding process conditions of each vehicle are the same, and greatly improve the welding quality and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is one of the overall structural schematic diagrams of the utility model.

[0027] Figure 2 This is the second schematic diagram of the overall structure of the utility model.

[0028] Figure 3 This is a structural schematic diagram of the driving gear box of the utility model.

[0029] Figure 4 It is a schematic diagram of the explosion structure of the grinding and shaping cutter body of the utility model.

[0030] Figure 5 For this utility model Figure 3 Enlarged structural diagram at A in the middle.

[0031] Figure 6 This is a schematic diagram of the structure of the clamping assembly of the utility model.

[0032] Figure 7 It is a schematic diagram of the structure of the pneumatic ejection clip of the utility model.

[0033] In the figure: 1. driving gear box; 2. cap changing body; 21. fixing seat; 22. clamping assembly; 221. fixing plate; 222. first gear; 223. clamping claw; 224. positioning column; 225. pushing block; 3. grinding shaping knife body; 31. second gear; 32. blade fixing cylinder; 33. grinding blade; 4. air blowing nozzle; 5. driving motor; 6. first sensor; 7. second sensor; 8. pneumatic ejection clip; 9. distribution box; 10. supporting frame; 11. electrode collection box; 12. electrode discharge pipe. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] The utility model provides Figure 1-7The welding electrode automatic grinding and capping machine shown comprises: a support frame 10, a driving gear box 1 is installed on the top of the support frame 10; a driving motor 5, the driving motor 5 is installed on one side of the driving gear box 1, and the output end of the driving motor 5 is connected to the driving gear box 1; a capping body 2 and a grinding and shaping knife body 3 are installed on the top of the driving gear box 1, the axis of the grinding and shaping knife body 3 is parallel to the axis of the capping body 2 and is on the same horizontal line, a blowing nozzle 4 is installed at the edge of the top of the driving gear box 1 through a support plate, a pneumatic ejection clip 8 is installed on the side of the top of the support frame 10, a second sensor 7 is installed on the top of the pneumatic ejection clip 8, and a first sensor 6 is arranged obliquely above the second sensor 7, and the first sensor 6 is connected to the top of the support frame 10 through a bracket. A distribution box 9 is installed on one side of the support frame 10, and an electrode collection box 11 is installed on the other side of the support frame 10. An electrode discharge pipe 12 is installed on the electrode collection box 11, and one end of the electrode discharge pipe 12 is connected to the capping body 2. After the workpiece is welded, the robot sends a command to drive the motor 5 to run, the output end rotates, and the second gear 31 is driven to rotate by the internal gear of the driving gear box 1. The center of the electrode of the welding clamp is aligned with the center of the grinding blade 33. The electrodes on both sides of the welding clamp are clamped in the grinding and shaping cutter body 3. The high-speed rotation of the grinding blade 33 is driven by the blade fixing tube 32 to grind and shape the electrode. The air blowing nozzle 4 is connected to the external air pump through an external pipe, and compressed air is blown in through the air pump, so that the air blowing nozzle 4 discharges air to clean the grinding and shaping cutter body 3. When changing the cap, the robot sends a command, and the electrodes on both sides of the welding clamp are respectively aligned with the center of the cap changing body 2. At the same time, the driving motor 5 rotates and drives the clamping assembly 22 to rotate clockwise through the internal gear of the driving gear box 1, so that the clamping protrusion on the clamping assembly 22 can move toward the direction of the motor, so that the clamping claw 223 can rotate at the same time to lock the electrode and rotate together to complete the electrode disassembly. After the electrode is separated from the electrode rod, the welding clamp and the electrode rod retreat along the rotation center of the cap replacement body 2 to complete the cap removal on one side. A negative pressure machine is provided at the end of the electrode discharge pipe 12. At the same time, the removed electrode cap is sucked out of the electrode under the compressed air of the negative pressure machine at the end of the electrode discharge pipe 12, and slides into the electrode collection box 11 through the electrode discharge pipe 12. After the electrode cap is removed, the electrode rod of the welding clamp moves to the detection end of the first sensor 6 to detect whether the electrode is removed. If the electrode cap fails to be removed, the welding clamp will return again to repeat the cap removal action. If the electrode cap is successfully removed, the first sensor 6 sends a signal, and the robot drives the welding clamp to move to the center of the outlet on one side of the new electrode of the pneumatic ejection clip 8, inserts the electrode rod into the electrode cap installation hole, and pulls out the electrode cap along the removal direction. After the above action of the welding clamp is completed, the welding clamp moves to the detection end of the first sensor 6 again to detect whether the electrode cap is successfully installed. If the installation fails, the above action must be repeated again to reinstall the electrode. Until the first sensor 6 sends a signal after the successful installation. The welding clamp returns to the welding waiting area, and after the new electrode is taken out, the subsequent adjacent electrode is pushed by the cylinder in the pneumatic ejection clip 8 and moves along the positioning end of the removal outlet.When the rearmost electrode is taken out, the second sensor 7 cannot detect that there is any electrode passing through, and the second sensor 7 sends a signal to notify that a new electrode cap needs to be filled into the pneumatic ejection magazine 8.

[0036] Furthermore, the grinding and shaping blade body 3 includes: a second gear 31, which is rotatably arranged inside the driving gear box 1 through a bearing; a blade fixing cylinder 32, which is fixedly inserted and installed in the middle of the second gear 31; and a grinding blade 33, which is installed inside the blade fixing cylinder 32. The cross section of the grinding blade 33 is cross-shaped, and blades are arranged on both sides of the grinding blade 33. The second gear 31 facilitates the rotation of the blade fixing cylinder 32, so that the blade fixing cylinder 32 can drive the rotation of the grinding blade 33, and the blades on both sides of the grinding blade 33 facilitate bidirectional grinding and shaping.

[0037] Furthermore, the cap-changing body 2 includes: a fixing seat 21, which is fixedly embedded in the interior of the driving gear box 1; a clamping assembly 22, which is arranged inside the fixing seat 21, and the clamping assembly 22 is used to lock the electrode, and the fixing seat 21 is used to facilitate the installation of the clamping assembly 22.

[0038] Further, the clamping assembly 22 includes: a fixed disk 221, which is fixedly installed inside the fixed seat 21; a first gear 222, which is rotatably arranged outside the fixed disk 221; a clamping jaw 223, wherein a plurality of clamping jaws 223 are movably arranged between the fixed disks 221, and a clamping protrusion is arranged on the inner side surface of one end of the clamping jaw 223; a positioning column 224, wherein a plurality of positioning columns 224 are fixedly connected between the fixed disks 221, and the positioning column 224 is rotatably interlaced with the middle part of the clamping jaw 223; a pushing block 225, wherein the pushing block 225 is connected to the outer side surface of the clamping jaw 223, and a plurality of limiting grooves are arranged in a ring array on the inner side of the first gear 222, and the pushing block 225 is movably limited inside the limiting groove, and at the same time, the driving motor 5 rotates to drive the first gear 222 to rotate clockwise through the internal gear of the driving gear box 1, and the limiting groove is synchronously driven to rotate together through the first gear 222, so that the inner wall of the limiting groove can be aligned with the inner wall of the limiting groove. The pushing block 225 pushes, so that the clamping jaw 223 rotates around the positioning column 224 as the axis, so that the clamping protrusion on the clamping jaw 223 can move in the direction of the motor, so that the clamping jaw 223 can rotate and lock the electrode at the same time to complete the electrode disassembly. The length and width of the limiting groove are greater than the length and width of the pushing block 225, so that the first gear 222 pushes the pushing block 225 to move, and the pushing block 225 will not be stuck inside the limiting groove, so that the clamping jaw 223 can drive the pushing block 225 connected thereto to rotate around the axis, and the positioning column 224 is used to limit the rotation of the clamping jaw 223, so that the rotation of the fixed axis of the clamping jaw 223 is more stable. Through the seesaw principle, when the clamping jaw 223 rotates around the positioning column 224 as the fulcrum, the clamping jaw 223 will drive the clamping protrusion at its end to feed and retract, so that when the clamping protrusion is fed, the electrode is locked, and when it is retracted, it is unlocked.

[0039] The theoretical comparison of cutting technology and grinding and shaping technology is shown in the following table:

[0040]

[0041] Each time the electrode is ground, the attachments on the electrode welding working surface can be removed and the welding end surface can be shaped, thereby improving the welding quality of the workpiece. By comparing the two processes in the above table, the frequency of cap replacement is reduced, and the electrode cost occupancy is significantly reduced.

[0042] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding electrode automatic grinding and cap changing machine, comprising: A supporting frame (10), wherein a driving gear box (1) is mounted on the top of the supporting frame (10); A driving motor (5), wherein the driving motor (5) is mounted on one side of the driving gear box (1), and an output end of the driving motor (5) is connected to the driving gear box (1); The invention is characterized in that: a cap changing body (2) and a grinding and shaping knife body (3) are installed on the top of the driving gear box (1); the axis of the grinding and shaping knife body (3) is parallel to the axis of the cap changing body (2) and is on the same horizontal line; an air blowing nozzle (4) is installed at the edge of the top of the driving gear box (1) through a support plate; a pneumatic ejection clip (8) is installed on the side of the top of the supporting frame (10); a second sensor (7) is installed on the top of the pneumatic ejection clip (8); a first sensor (6) is arranged obliquely above the second sensor (7); and the first sensor (6) is connected to the top of the supporting frame (10) through a bracket.

2. The automatic grinding and capping machine for welding electrodes according to claim 1, characterized in that: A distribution box (9) is installed on one side of the support frame (10), and an electrode collection box (11) is installed on the other side of the support frame (10).

3. The automatic grinding and capping machine for welding electrodes according to claim 2, characterized in that: An electrode discharge tube (12) is installed on the electrode collection box (11), and one end of the electrode discharge tube (12) is connected to the cap replacement body (2).

4. The automatic grinding and capping machine for welding electrodes according to claim 1, characterized in that: The grinding and shaping cutter body (3) comprises: A second gear (31), the second gear (31) being rotatably disposed inside the driving gear box (1) via a bearing; A blade fixing cylinder (32), wherein the blade fixing cylinder (32) is fixedly inserted and installed in the middle of the second gear (31); A grinding blade (33), wherein the grinding blade (33) is installed inside the blade fixing cylinder (32).

5. The automatic grinding and capping machine for welding electrodes according to claim 4, characterized in that: The cross section of the grinding blade (33) is cross-shaped, and blades are arranged on both sides of the grinding blade (33).

6. The automatic grinding and capping machine for welding electrodes according to claim 1, characterized in that: The cap-changing body (2) comprises: A fixing seat (21), wherein the fixing seat (21) is fixedly embedded in the interior of the driving gear box (1); A clamping assembly (22), wherein the clamping assembly (22) is arranged inside the fixing seat (21), and the clamping assembly (22) is used to lock the electrode.

7. The automatic grinding and capping machine for welding electrodes according to claim 6, characterized in that: The clamping assembly (22) comprises: A fixed plate (221), wherein the fixed plate (221) is fixedly mounted inside the fixed seat (21); A first gear (222), the first gear (222) being rotatably disposed outside the fixed disk (221); A clamping jaw (223), wherein a plurality of the clamping jaws (223) are movably disposed between the fixed plates (221), and a clamping protrusion is disposed on the inner side surface of one end of the clamping jaw (223); Positioning posts (224), a plurality of said positioning posts (224) are fixedly connected between the fixed plates (221), and said positioning posts (224) are rotatably interlaced with the middle of the clamping jaws (223); A pushing block (225) is connected to the outer side surface of the clamping claw (223); a plurality of limiting grooves are arranged in a ring array on the inner side of the first gear (222); and the pushing block (225) is movably limited inside the limiting grooves.

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