Automatic grinding equipment and method for projection welding electrode

Abstract

The invention discloses automatic coping equipment and method for a projection welding electrode. The coping equipment comprises a coping body, a buffer compensation mechanism, a cross sliding module and a control device. The grinding body is flexibly connected with the buffer compensation mechanism, the grinding body can move relative to the buffer compensation mechanism, and the buffer compensation mechanism is arranged on the cross sliding module; the cross sliding module is used for driving the buffer compensation mechanism and the coping body to move in the horizontal direction and the vertical direction. The buffer compensation mechanism is used for driving the grinding body to do lifting motion and compensating the distance change between the grinding body and the to-be-ground electrode; the buffer compensation mechanism is further used for detecting whether the grinding body is located at the safe position or not. The distance change between the grinding body and the to-be-ground electrode is compensated through the buffer compensation mechanism, so that the grinding body can automatically grind the electrode according to the abrasion degree of the electrode, and the maintenance cost of the electrode is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of processing equipment, and particularly to an automatic grinding equipment and method for projection welding electrodes. Background Art

[0002] Welding electrodes are used for welding in resistance welding equipment, such as single-sided spot welders, stationary spot welders, suspended spot welders, manipulator spot welders, robot spot welders, and stud projection welders. Most of them are made of chromium zirconium copper, and some are dispersion copper. After the electrodes are welded a certain number of times, they need to be ground or replaced due to end face wear and deformation, and they belong to welding consumable parts. Among them, the traditional solution for grinding the electrodes of projection welders is to mill a certain length of the electrodes to ensure that they reach a qualified shape. However, a set of tools of traditional milling equipment can only perform milling of a unified size and cannot be adaptively adjusted according to the wear degree of the electrodes, resulting in the problem that it is difficult to automatically grind the electrodes of projection welders. Moreover, a pair of brand-new electrodes need to be replaced with new ones after being milled about 70 times due to severe wear, resulting in high costs. Summary of the Invention

[0003] The present invention provides an automatic grinding equipment and method for projection welding electrodes, aiming to solve the problem that it is difficult to automatically grind the electrodes of projection welders in the prior art.

[0004] In a first aspect, the present invention provides an automatic grinding equipment for projection welding electrodes, which includes: a grinding body, a buffer compensation mechanism, a cross sliding module, and a control device; the grinding body is flexibly connected to the buffer compensation mechanism, and the grinding body can move relative to the buffer compensation mechanism. The buffer compensation mechanism is arranged on the cross sliding module, and the control device is communicatively connected to the grinding body, the buffer compensation mechanism, and the cross sliding module; wherein, the control device is used to control the grinding body, the buffer compensation mechanism, and the cross sliding module; the cross sliding module is used to drive the buffer compensation mechanism and the grinding body to move in the horizontal and vertical directions; the buffer compensation mechanism is used to drive the grinding body to perform lifting movement and compensate for the distance change between the grinding body and the electrode to be ground; the buffer compensation mechanism is further used to detect whether the grinding body is in a safe position; the grinding body is used to grind the electrode to be ground.

[0005] In a second aspect, the present invention further provides an automatic grinding method for projection welding electrodes, which is applied to the automatic grinding equipment for projection welding electrodes as described in the first aspect. The automatic grinding equipment for projection welding electrodes includes a grinding body, a buffer compensation mechanism, a cross sliding module, and a control device; the method includes:

[0006] If the control device receives a grinding signal sent by the welding machine control terminal, it controls the cross-sliding module to drive the buffer compensation mechanism and the grinding body to move in the vertical direction, so that the grinding body moves to a preset intermediate working position;

[0007] If the control device receives the safety signal continuously sent by the buffer compensation mechanism when the grinding body moves in the vertical direction, and receives the first in-place signal sent by the cross-sliding module, it controls the cross-sliding module to drive the buffer compensation mechanism and the grinding body to move in the horizontal direction, so that the grinding body moves to a preset grinding working position;

[0008] If the control device receives the safety signal continuously sent by the buffer compensation mechanism when the grinding body moves in the horizontal direction, and receives the second in-place signal sent by the cross-sliding module, it controls the buffer compensation mechanism to drive the grinding body to descend a preset distance;

[0009] The control device controls the grinding body to start running and sends a motor rotation signal to the welding machine control terminal, so that the welding machine control terminal controls the upper electrode of the electrode to be ground in the projection welding machine to press down and drive the grinding body to contact the lower electrode of the electrode to be ground according to the motor rotation signal;

[0010] When the grinding body grinds the electrode to be ground, the buffer compensation mechanism compensates for the change in the distance between the grinding body and the electrode to be ground;

[0011] If the control device determines that the startup running time of the grinding body is equal to the preset time, it controls the grinding body to stop running and controls the buffer compensation mechanism and the cross-sliding module to reset to their corresponding initial states.

[0012] Compared with the prior art, the projection welding electrode automatic grinding equipment and method provided by the present invention, the grinding equipment includes a grinding body, a buffer compensation mechanism, a cross-sliding module and a control device; the grinding body is flexibly connected to the buffer compensation mechanism, and the grinding body can move relative to the buffer compensation mechanism, and the buffer compensation mechanism is arranged on the cross-sliding module; the cross-sliding module is used to drive the buffer compensation mechanism and the grinding body to move in the horizontal direction and the vertical direction; the buffer compensation mechanism is used to drive the grinding body to move up and down to compensate for the change in the distance between the grinding body and the electrode to be ground; the buffer compensation mechanism is also used to detect whether the grinding body is in a safe position when moving in the horizontal direction or in the vertical direction. The present invention compensates for the change in the distance between the grinding body and the electrode to be ground through the buffer compensation mechanism, so that the grinding body can automatically grind the electrode according to the wear degree of the electrode, reducing the maintenance cost of the electrode. Brief Description of the Drawings

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0014] Figure 1 Schematic structural diagram of the projection welding electrode automatic grinding equipment provided by an embodiment of the present invention;

[0015] Figure 2 Exploded view of the grinding body provided by an embodiment of the present invention;

[0016] Figure 3 Schematic structural diagram of the grinding body and the buffer compensation mechanism provided by an embodiment of the present invention;

[0017] Figure 4 Exploded view of the cylinder assembly and the elastic assembly provided by an embodiment of the present invention;

[0018] Figure 5 Schematic structural diagram of the cross-sliding module provided by an embodiment of the present invention;

[0019] Figure 6 Schematic structural diagram of the cross-sliding module provided by another embodiment of the present invention;

[0020] Figure 7 Schematic structural diagram of the control device provided by an embodiment of the present invention;

[0021] Figure 8 Schematic flow chart of the projection welding electrode automatic grinding method provided by an embodiment of the present invention.

[0022] Wherein:

[0023] 1. Grinding body; 11. Grinding tool; 12. Gearbox; 121. Upper cover of gearbox; 122. Driving gear; 123. Lower seat of gearbox; 124. Tool mounting gear; 125. Bearing; 13. Grinding power motor; 14. Installation through hole; 15. Motor mounting plate; 2. Buffer compensation mechanism; 21. Guide assembly; 211. Base plate; 212. First bearing seat; 213. Second bearing seat; 214. Guide rod; 215. Connecting bracket; 216. Side plate bracket; 22. Cylinder assembly; 221. Cylinder mounting plate; 222. Compensation cylinder; 223. Extension shaft; 23. Elastic component; 231. Spring sleeve; 232. Buffer spring; 24. Compensation safety detection switch; 25. First solenoid valve group; 3. Cross sliding module; 31. Horizontal direction sliding component; 311. Slide block connection component; 3111. Horizontal mounting surface; 3112. Horizontal slide block; 3113. Connecting block; 312. Horizontal slide rail; 313. Connecting support plate; 314. First driving cylinder; 315. First in-place detection switch; 316. Side guard plate; 32. Vertical direction sliding component; 321. Column component; 322. Vertical slide rail; 323. Vertical slide block; 324. Support plate; 325. Cylinder holding bracket; 326. Second driving cylinder; 327. Second in-place detection switch; 328. Angular cylinder bracket; 329. Cylinder stroke adjusting sleeve; 33. Second solenoid valve group; 4. Control device; 41. Control box housing; 42. Motor driver; 43. Terminal block; 44. Air switch; 45. AC contactor; 46. Switching power supply; 47. Interface board; 5. Chip blowing and collecting device; 51. Negative pressure device; 52. Steel wire hose; 53. Storage barrel; 54. Chip blowing air pipe. Detailed implementation manners

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] The directional terms mentioned in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., are only references to the directions in the attached drawings. Therefore, the directional terms used are for explaining and understanding the present invention, rather than for limiting the present invention.

[0026] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0027] Referring to Figures 1 to 8 , Figure 1 is a schematic structural diagram of a projection welding electrode automatic grinding device provided by an embodiment of the present invention; Figure 2 is an exploded view of a grinding body provided by an embodiment of the present invention; Figure 3 is a schematic structural diagram of a grinding body and a buffer compensation mechanism provided by an embodiment of the present invention; Figure 4 is an exploded view of a cylinder assembly and an elastic assembly provided by an embodiment of the present invention; Figure 5 is a schematic structural diagram of a cross sliding module provided by an embodiment of the present invention; Figure 6 is a schematic structural diagram of a cross sliding module provided by another embodiment of the present invention; Figure 7 is a schematic structural diagram of a control device provided by an embodiment of the present invention; Figure 8 is a schematic flow chart of a projection welding electrode automatic grinding method provided by an embodiment of the present invention.

[0028] The present invention provides a projection welding electrode automatic grinding device, which includes: a grinding body 1, a buffer compensation mechanism 2, a cross sliding module 3, and a control device 4; the grinding body 1 is flexibly connected to the buffer compensation mechanism 2, and the grinding body 1 can move relative to the buffer compensation mechanism 2, the buffer compensation mechanism 2 is arranged on the cross sliding module 3, and the control device 4 is communicatively connected to the grinding body 1, the buffer compensation mechanism 2, and the cross sliding module 3; wherein, the control device 4 is used to control the grinding body 1, the buffer compensation mechanism 2, and the cross sliding module 3; the cross sliding module 3 is used to drive the buffer compensation mechanism 2 and the grinding body 1 to move in the horizontal and vertical directions; the buffer compensation mechanism 2 is used to drive the grinding body 1 to perform lifting movement and compensate for the distance change between the grinding body 1 and the electrode to be ground; the buffer compensation mechanism 2 is also used to detect whether the grinding body 1 is in a safe position; the grinding body 1 is used to grind the electrode to be ground.

[0029] In this embodiment, referring to Figure 1, the automatic electrode dressing equipment provided by the present invention is used for dressing the electrodes of a projection welder. The electrodes to be dressed are mainly the upper electrode and the lower electrode of the projection welder. The equipment specifically includes a dressing body 1, a buffer compensation mechanism 2, a cross-sliding module 3, and a control device 4. Among them, a dressing tool 11 for dressing the electrodes to be dressed is provided in the dressing body 1. The control device 4 serves as a control unit and is used to control the dressing body 1, the buffer compensation mechanism 2, and the cross-sliding module 3 to perform corresponding operations, so as to complete the dressing work of the electrodes.

[0030] In the implementation process of dressing the electrodes, first, the cross-sliding module 3 provides driving in the horizontal and vertical directions, and then drives the buffer compensation mechanism 2 and the dressing body 1 to move in the horizontal and vertical directions, so as to drive the dressing body 1 to move to a preset dressing working position. Among them, the horizontal direction can specifically be the horizontal front-back direction or the horizontal left-right direction. By changing the installation method and some components, the cross-sliding module 3 can drive the dressing body to perform combined movements such as the horizontal front-back direction and the vertical up-down direction, the horizontal left-right direction and the vertical up-down direction, or the horizontal front-back direction and the horizontal left-right direction, so as to adapt to the actual use conditions. Preferably, the cross-sliding module 3 can also feedback a corresponding in-place signal to the control device 4. The in-place signal is used to indicate that the dressing body 1 has reached the corresponding working position, so that the control device 4 can perform subsequent actions according to the in-place signal feedback by the cross-sliding module 3. And, the buffer compensation mechanism 2 can detect in real time whether the dressing body 1 is in a safe position. When the buffer compensation mechanism 2 detects that the dressing body 1 is in a safe position, it will feedback a safety signal to the control device 4. During the process of the cross-sliding module 3 driving the dressing body 1 to move in the horizontal and vertical directions, if the control device 4 does not receive the safety signal feedback by the buffer compensation mechanism 2, it means that the buffer compensation mechanism 2 detects that the dressing body 1 is not in a safe position during this movement process. The control device 4 will then control the cross-sliding module 3 to stop working to prevent the dressing body 1 from colliding, thereby avoiding damage to the dressing body 1 due to collision.

[0031] Then, after the dressing body 1 moves to the dressing working position, the buffer compensation mechanism 2 can drive the dressing body 1 to descend a preset distance, so that the dressing tool 11 in the dressing body 1 maintains a preset distance from the lower electrode of the projection welder. Preferably, the preset distance is 2 mm.

[0032] Finally, since the connection between the grinding body 1 and the buffer compensation mechanism 2 is a flexible connection, and the grinding body 1 can move relative to the buffer compensation mechanism 2 within a certain range. After the grinding tool 11 in the grinding body 1 maintains a preset distance from the lower electrode of the projection welder, the upper electrode of the projection welder moves towards the upper plane direction of the grinding tool 11 in the grinding body 1 and finally contacts the grinding tool 11 of the grinding body 1. The upper electrode can continue to drive the grinding body 1 to move relative to the buffer compensation mechanism 2, so that the grinding tool 11 of the grinding body 1 contacts the lower electrode, and the grinding tool 11 grinds the upper electrode and the lower electrode simultaneously. Moreover, the buffer compensation mechanism 2 can reduce the impact force between the upper electrode and the grinding body 1 during this process to prevent the electrode from being damaged. At the same time, as the electrode to be ground becomes shorter due to grinding, the buffer compensation mechanism 2 can compensate for the distance change between the grinding body 1 and the electrode to be ground, so that the grinding tool 11 closely cooperates with the electrode to be ground. Thus, the grinding body 1 can automatically grind the electrode according to the wear degree of the electrode, avoiding the over-grinding problem that occurs when the electrodes with inconsistent wear are ground according to the maximum grinding amount, avoiding the increase of the grinding amount, avoiding waste of resources, reducing the maintenance cost of the electrode, and prolonging the service life of the electrode.

[0033] In a more specific embodiment, the buffer compensation mechanism 2 includes a guiding component 21, a cylinder component 22, an elastic component 23, and a compensation safety detection switch 24. The bottom of the guiding component 21 is arranged on the cross sliding module 3. One end of the cylinder component 22 is connected to the guiding component 21, the other end of the cylinder component 22 is connected to the elastic component 23, the elastic component 23 is connected to the top of the grinding body 1, the grinding body 1 is connected to the guiding component 21, and the grinding body 1 can perform lifting movement along the guiding component 21. The compensation safety detection switch 24 is arranged on the side surface of the guiding component 21. Both the cylinder component 22 and the compensation safety detection switch 24 are communicatively connected to the control device 4.

[0034] In this embodiment, refer to Figure 1 and Figure 3, the guiding component 21 is installed on the cross-sliding module 3. The guiding component 21 is connected to the grinding body 1 and is used to guide the lifting movement of the grinding body 1. The top of the grinding body 1 is connected to the elastic component 23, and the elastic component 23 is connected to the cylinder component 22 installed on the guiding component 21. Among them, the cylinder component 22 can drive the grinding body 1 to move up and down along the guiding component 21. And under the action of the elastic component 23, when the upper electrode of the projection welder presses down the grinding tool 11 in the grinding body 1, after the elastic element in the elastic component 23 is compressed by force, it will make the grinding body 1 move up and down along the guiding component 21 to achieve the buffering function. At the same time, as the electrode to be ground becomes shorter during grinding, the elastic component 23 can compensate for the change in the distance between the grinding body 1 and the electrode to be ground. A compensation safety detector is installed on the side of the guiding component 21. The compensation safety detector switch 24 detects whether the grinding body 1 is in a safe position when it moves horizontally or vertically under the drive of the cross-sliding module 3. If the compensation safety detector switch 24 detects that the grinding body 1 is in a safe position, it will feedback a safety signal to the control device 4. Preferably, the buffer compensation mechanism 2 may further include a first solenoid valve group 25. The first solenoid valve group 25 is arranged on the side of the guiding component 21. The cylinder component 22 and the compensation safety detector switch 24 are communicatively connected to the control device 4 through the first solenoid valve group 25, and the control device 4 controls the action of the cylinder component 22 and receives the safety signal feedback by the compensation safety detector switch 24.

[0035] In a more specific embodiment, the guiding component 21 includes a bottom plate 211, a first bearing seat 212, a second bearing seat 213, a guiding rod 214, a connecting bracket 215 and a side plate bracket 216; one end of the bottom plate 211 is arranged on the cross-sliding module 3, and the first bearing seat 212 is arranged on the other end of the bottom plate 211; one end of the guiding rod 214 passes through the first bearing seat 212, and the other end of the guiding rod 214 passes through the second bearing seat 213; the connecting bracket 215 is connected to the guiding rod 214, and the connecting bracket 215 is located between the first bearing seat 212 and the second bearing seat 213, and the grinding body 1 is connected to the connecting bracket 215; the side plate bracket 216 is connected to the first bearing seat 212 and the second bearing seat 213, and the compensation safety detector switch 24 is arranged on the side plate bracket 216.

[0036] In this embodiment, refer to Figure 1 and Figure 3, the first bearing block 212 is installed on the base plate 211. Both ends of the guide rod 214 are respectively inserted through the first bearing block 212 and the second bearing block 213. The connecting bracket 215 and the guide rod 214 can be tightly connected by a Kimi screw. And the connecting bracket 215 is located between the first bearing block 212 and the second bearing block 213. The grinding body 1 is connected to the connecting bracket 215. The guide rod 214 can move relative to the first bearing block 212 and the second bearing block 213. Thus, the connecting bracket 215 and the grinding body 1 move relative to the first bearing block 212 and the second bearing block 213 along the axial direction of the guide rod 214 at the same time. The side plate bracket 216 is installed on the outer side surfaces of the first bearing block 212 and the second bearing block 213. The compensation safety detection switch 24 is installed on one side of the side plate bracket 216 away from the first bearing block 212 and the second bearing block 213. Wherein, through holes are provided on the side plate bracket 216. The compensation safety detection switch 24 detects the position of the connecting bracket 215 through the through holes to judge whether the position of the grinding body 1 has changed, so as to determine whether the grinding body 1 is in a safe position.

[0037] In a more specific embodiment, the cylinder assembly 22 includes a cylinder mounting plate 221, a compensation cylinder 222 and an extension shaft 223, and the elastic assembly 23 includes a spring sleeve 231 and a buffer spring 232; the cylinder mounting plate 221 is connected to the guide assembly 21, the compensation cylinder 222 is connected to the cylinder mounting plate 221, the extension shaft 223 is connected to the compensation cylinder 222, the buffer spring 232 is sleeved on the extension shaft 223, both the buffer spring 232 and the extension shaft 223 are arranged inside the spring sleeve 231, and the bottom of the spring sleeve 231 is connected to the top of the grinding body 1.

[0038] In this embodiment, refer to Figure 1 and Figure 3, the cylinder mounting plate 221 is used to carry the compensation cylinder 222. The cylinder mounting plate 221 is specifically mounted on the top of the second bearing block 213 in the guiding assembly 21. The compensation cylinder 222 is mounted on the cylinder mounting plate 221. The output shaft of the compensation cylinder 222 is connected to the extension shaft 223. The buffer spring 232 is sleeved on the extension shaft 223, and both the buffer spring 232 and the extension shaft 223 are mounted inside the spring sleeve 231. The bottom of the spring sleeve 231 is connected to the top of the grinding body 1. Among them, the compensation cylinder 222 can drive the grinding body 1 to move up and down along the axis direction of the extension shaft 223. The axis direction of the extension shaft 223 is the same as the axis direction of the guide rod 214 in the guiding assembly 21, that is, the compensation cylinder 222 can drive the grinding body 1 to move up and down along the axis direction of the guide rod 214 in the guiding assembly 21. A buffer spring 232 is installed inside the spring sleeve 231 connected to the grinding body 1. When the upper electrode of the projection welder presses down the grinding tool 11 in the grinding body 1, after the buffer spring 232 is compressed by force, it will cause the grinding body 1 to move up and down along the axis direction of the guide rod 214 in the guiding assembly 21 to achieve the buffering function. At the same time, as the electrode to be ground becomes shorter due to grinding, under the action of the buffer spring 232, the distance change between the grinding body 1 and the electrode to be ground can be compensated, so that the grinding tool 11 is closely matched with the electrode to be ground.

[0039] In a more specific embodiment, the cross-sliding module 3 includes a horizontal-direction sliding component 31 and a vertical-direction sliding component 32; one end of the horizontal-direction sliding component 31 is arranged on the vertical-direction sliding component 32, the buffer compensation mechanism 2 is arranged on the other end of the horizontal-direction sliding component 31, and both the horizontal-direction sliding component 31 and the vertical-direction sliding component 32 are in communication connection with the control device 4; among them, the horizontal-direction sliding component 31 is used to drive the buffer compensation mechanism 2 and the grinding body 1 to move in the horizontal direction; the vertical-direction sliding component 32 is used to drive the buffer compensation mechanism 2 and the grinding body 1 to move in the vertical direction.

[0040] In this embodiment, referring to Figure 1 、 Figure 5 and Figure 6 , the horizontal-direction sliding component 31 is mounted on the vertical-direction sliding component 32, the buffer compensation mechanism 2 is mounted on the horizontal-direction sliding component 31, and the grinding body 1 is driven to move in the horizontal direction and the vertical direction respectively by the horizontal-direction sliding component 31 and the vertical-direction sliding component 32, so that the grinding body 1 can move to the grinding working position. Among them, both the horizontal-direction sliding component 31 and the vertical-direction sliding component 32 are in communication connection with the control device 4 through the second solenoid valve group 33, and the control device 4 controls the horizontal-direction sliding component 31 and the vertical-direction sliding component 32 to perform corresponding actions.

[0041] In a more specific embodiment, the horizontal direction sliding assembly 31 includes a slider connection assembly 311, a horizontal slide rail 312, a connection support plate 313, a first driving cylinder 314, and a first in-place detection switch 315; one end of the slider connection assembly 311 is connected to the buffer compensation mechanism 2, the other end of the slider connection assembly 311 is slidably connected to the horizontal slide rail 312, the horizontal slide rail 312 is connected to the top of the connection support plate 313, the bottom of the connection support plate 313 is connected to the vertical direction sliding assembly 32, the first driving cylinder 314 is connected to the side of the connection support plate 313, the first driving cylinder 314 is further connected to the slider connection assembly 311, and the first in-place detection switch 315 is connected to the first driving cylinder 314; both the first driving cylinder 314 and the first in-place detection switch 315 are communicatively connected to the control device 4.

[0042] In this embodiment, referring to Figure 3 and Figure 5 , the connection support plate 313 is installed on the vertical direction sliding assembly 32. A horizontal slide rail 312 and a slider connection assembly 311 slidably connected to the horizontal slide rail 312 are installed on the top of the connection support plate 313. At the same time, a first driving cylinder 314 is installed on the side of the connection support plate 313. The first driving cylinder 314 is connected to the slider connection assembly 311. By driving the slider connection assembly 311 to move along the horizontal slide rail 312 by the first driving cylinder 314, the buffer compensation mechanism 2 installed on the slider connection assembly 311 is driven to move along the horizontal slide rail 312, so that the grinding body 1 installed on the buffer compensation mechanism 2 can move in the horizontal direction. Preferably, the slider connection assembly 311 includes a horizontal mounting surface 3111, a horizontal slider 3112, and a connection block 3113. The top of the horizontal mounting surface 3111 is connected to the buffer compensation mechanism 2, the bottom of the horizontal mounting surface 3111 is connected to the horizontal slider 3112, the horizontal slider 3112 is slidably connected to the horizontal slide rail 312, and the first driving cylinder 314 is connected to the horizontal mounting surface 3111 through the connection block 3113. In addition, a first in-place detection switch 315 is further installed on the first driving cylinder 314. The first in-place detection switch 315 is used to detect whether the first driving cylinder 314 works in place and feed back the detected in-place signal to the control device 4. Further, the horizontal direction sliding assembly 31 further includes side guard plates 316 provided on both sides of the connection support plate 313. The side guard plates 316 are used to protect the horizontal slide rail 312.

[0043] In a more specific embodiment, the vertical sliding assembly 32 includes a column assembly 321, a vertical slide rail 322, a vertical slider 323, a support plate 324, a cylinder holding bracket 325, a second driving cylinder 326, and a second in-place detection switch 327. The vertical slide rail 322 is connected to the column assembly 321. One end of the vertical slider 323 is slidably connected to the vertical slide rail 322, and the other end of the vertical slider 323 is connected to the support plate 324. The top of the support plate 324 is connected to one end of the horizontal sliding assembly 31. The cylinder holding bracket 325 is connected to the side of the column assembly 321 away from the vertical slide rail 322. The cylinder holding bracket 325 is also connected to the other end of the horizontal sliding assembly 31 and the second driving cylinder 326. The second in-place detection switch 327 is connected to the second driving cylinder 326. Both the second driving cylinder 326 and the second in-place detection switch 327 are communicatively connected to the control device 4.

[0044] In this embodiment, referring to Figure 5 and Figure 6 , a vertical slide rail 322 is installed on one side of the column assembly 321. A vertical slider 323 is installed on the vertical slide rail 322. The vertical slider 323 is connected to one end of a connecting support plate 313 in the horizontal sliding assembly 31 through the support plate 324. The other end of the connecting support plate 313 in the horizontal sliding assembly 31 is connected to the cylinder holding bracket 325. The cylinder holding bracket 325 is installed on the other side of the column assembly 321 and is connected to the second driving cylinder 326. The second driving cylinder 326 is locked and fixed to the column assembly 321 through an angular cylinder bracket 328. Thus, the horizontal sliding assembly 31 is jointly supported by the support plate 324 and the cylinder holding bracket 325, and the second driving cylinder 326 drives the support plate 324, the cylinder holding bracket 325, and the horizontal sliding assembly 31 to move vertically, ultimately enabling the grinding main body to move in the vertical direction. Moreover, a second in-place detection switch 327 is also installed on the second driving cylinder 326. The second in-place detection switch 327 is used to detect whether the second driving cylinder 326 works in place and feedback the detected in-place signal to the control device 4. Further, the vertical sliding assembly 32 further includes a cylinder stroke adjustment sleeve 329 that can adjust the second driving cylinder 326 within a certain range, enabling the stroke of the second driving cylinder 326 to be finely adjusted within a certain range to adapt to the actual working conditions. A pressure maintaining valve is also installed on the second driving cylinder 326, enabling the second driving cylinder 326 to still provide a large cylinder holding force when not supplied with gas for a short time to prevent damage caused by accidents.

[0045] In a more specific embodiment, the grinding body 1 includes a grinding tool 11, a gearbox 12, and a grinding power motor 13; an installation through-hole 14 is provided on the gearbox 12, the grinding tool 11 is disposed within the installation through-hole 14, the gearbox 12 is flexibly connected to the buffer compensation mechanism 2, and the grinding power motor 13 is connected to the gearbox 12.

[0046] In this embodiment, referring to Figure 2 , the grinding tool 11 is disposed within the installation through-hole 14 of the gearbox 12, the gearbox 12 is flexibly connected to the buffer compensation mechanism 2, the grinding power motor 13 is connected to the gearbox 12, and the grinding power motor 13 is used to drive the grinding tool 11 to rotate and work. Preferably, the gearbox 12 includes a gearbox upper cover 121, a driving gear 122, a gearbox lower seat 123, a tool installation gear 124, and a bearing 125. The grinding tool 11 is connected to the tool installation gear 124, the tool installation gear 124 is connected to the gearbox upper cover 121 and the gearbox lower seat 123 through the bearing 125, the gearbox upper cover 121 and the gearbox lower seat 123 are connected to the grinding power motor 13 through a motor mounting plate 15. At the same time, the driving gear 122 is installed on the power output shaft of the grinding power motor 13, and the driving gear 122 meshes with the tool installation gear 124, so that the driving gear 122 and the tool installation gear 124 transmit the motor power to drive the tool to rotate and work.

[0047] In a more specific embodiment, the projection welding electrode automatic grinding equipment further includes a chip blowing and collecting device 5. The chip blowing and collecting device 5 includes a negative pressure device 51, a steel wire hose 52, and a storage barrel 53; the negative pressure device 51 is connected to the grinding body 1, and the negative pressure device 51 is further connected to the storage barrel 53 through the steel wire hose 52, and the negative pressure device 51 is communicatively connected to the control device 4; wherein, the negative pressure device 51 is used to suck the waste chips generated by the grinding body 1 during electrode grinding into the storage barrel 53.

[0048] In this embodiment, referring to Figure 1 and Figure 2 , the negative pressure device 51 installed on the grinding body 1 is connected to the storage barrel 53 through the steel wire hose 52. Among them, the storage barrel 53 can be installed on the vertical direction sliding component 32 of the cross sliding module 3. Through the negative pressure generated by the negative pressure device 51, the waste chips generated by the grinding body 1 during electrode grinding can be sucked into the storage barrel 53 through the steel wire hose 52. And, the negative pressure device 51 is communicatively connected to the control device 4 to control the opening or closing of the negative pressure device 51 through the control device 4. In addition, the chip blowing and collecting device 5 further includes a chip blowing air pipe 54. The chip blowing air pipe 54 is connected to an air joint and passes through the corresponding installation through-hole 14 of the gearbox 12, so that its air outlet is aligned with the center of the grinding tool 11 to blow out the waste chips.

[0049] In a more specific embodiment, see Figure 7 The control device 4 may include a control box housing 41, a motor driver 42, a terminal block 43, an air switch 44, an AC contactor 45, a switching power supply 46 and an interface board 47. The control box housing 41 serves as the main bearing body, and a motor driver 42 is installed inside. The motor driver 42 can regulate the grinding power motor 13, the air switch 44 can control the opening and closing of the motor driver 42 circuit, the AC contactor 45 can protect the motor driver 42 circuit to prevent failure, the switching power supply 46 can supply power to the motor driver 42, and the motor driver 42 can also communicate with the corresponding solenoid valve group and induction switch in the buffer compensation mechanism 2 and the cross sliding module 3 through the interface board 47, transmit and receive working signals, etc.

[0050] The automatic grinding equipment for projection welding electrodes provided by the present invention compensates for the distance change between the grinding body 1 and the electrode to be ground through the buffer compensation mechanism 2, so that the grinding tool 11 and the electrode to be ground are closely matched, so that the grinding body 1 can automatically grind the electrode according to the wear degree of the electrode, thereby avoiding the problem of over-grinding when the electrode with inconsistent wear is ground according to the maximum grinding amount, avoiding the increase of the grinding amount, avoiding waste of resources, reducing the maintenance cost of the electrode, and improving the service life of the electrode.

[0051] See also Figure 8 The present invention also provides a method for automatically grinding projection welding electrodes, which is applied to the automatic grinding equipment for projection welding electrodes described in any of the above embodiments, wherein the automatic grinding equipment for projection welding electrodes comprises a grinding body, a buffer compensation mechanism, a cross-sliding module and a control device, wherein the control device is connected in communication with the grinding body, the buffer compensation mechanism and the cross-sliding module, and the control device is also connected in communication with the welding machine control terminal. Figure 8 The automatic grinding method for projection welding electrodes provided in an embodiment of the present invention includes steps S11 to S16.

[0052] S11. If the control device receives a grinding signal sent by the welding machine control terminal, it controls the cross sliding module to drive the buffer compensation mechanism and the grinding body to move in the vertical direction, so that the grinding body moves to a preset intermediate working position.

[0053] In this embodiment, if the control device receives a grinding signal sent by the welding machine control terminal, indicating that the electrode to be ground in the projection welding machine needs to be ground, the control device controls the cross sliding module to drive the grinding body to move in the vertical direction, so that the grinding body moves to a preset intermediate working position. More specifically, the control device controls the second driving cylinder in the cross sliding module to work, and drives the grinding body to move in the vertical direction to the intermediate working position through the second driving cylinder.

[0054] S12. If the control device receives the safety signal continuously sent by the buffer compensation mechanism when the grinding body moves along the vertical direction, and receives the first in-place signal sent by the cross-slide module, it controls the cross-slide module to drive the buffer compensation mechanism and the grinding body to move horizontally, so that the grinding body moves to a preset grinding working position; wherein, the safety signal is used to indicate that the grinding body is in a safe position;

[0055] In this embodiment, during the process of the grinding body moving along the vertical direction to the intermediate working position, the buffer compensation mechanism will detect whether the grinding body is in a safe position during this movement. If the control device receives the safety signal fed back by the buffer compensation mechanism during this movement, it means that the grinding body is in a safe position during this movement, that is, the safety signal indicates that the grinding body is in a safe position. At the same time, if the control device receives the first in-place signal sent by the cross-slide module, it means that the grinding body has reached the intermediate working position. After the grinding body safely moves to the intermediate working position, the control device controls the cross-slide module to drive the grinding body to move horizontally, so that the grinding body moves to a preset grinding working position. More specifically, the safety signal is fed back to the control device through the compensation safety detection switch in the buffer compensation mechanism, and the first in-place signal is fed back to the control device through the second in-place detection switch in the cross-slide module; and, the control device controls the first driving cylinder in the cross-slide module to work, and then the first driving cylinder drives the grinding body to move horizontally to the grinding working position.

[0056] S13. If the control device receives the safety signal continuously sent by the buffer compensation mechanism when the grinding body moves along the horizontal direction, and receives the second in-place signal sent by the cross-slide module, it controls the buffer compensation mechanism to drive the grinding body to descend a preset distance.

[0057] In this embodiment, during the process of the grinding body moving horizontally to the grinding working position, the buffer compensation mechanism will detect whether the grinding body is in a safe position during this movement. If the control device receives the safety signal feedback from the buffer compensation mechanism during this movement, it indicates that the grinding body is in a safe position during this movement. At the same time, if the control device receives the second in-place signal sent by the cross-sliding module, it indicates that the grinding body has reached the grinding working position. After the grinding body safely moves to the grinding working position, the control device controls the buffer compensation mechanism to drive the grinding body to descend a preset distance, so that the grinding body reaches the preset target position. The target position is the position where the lower end face of the grinding tool in the grinding body maintains a preset distance from the lower electrode of the projection welder. Preferably, the preset distance is 2 mm. More specifically, the second in-place signal is fed back to the control device by the first in-place detection switch in the cross-sliding module; the control device controls the compensation cylinder in the buffer compensation mechanism to work, and then the compensation cylinder pushes the grinding body to descend a preset distance.

[0058] In one embodiment, if the control device does not receive the safety signal sent by the buffer compensation mechanism during the process of the grinding body moving vertically or horizontally, it indicates that the grinding body is not in a safe position, and the grinding body may collide during the process of moving vertically or horizontally. Then the control cross-sliding module stops working to prevent the grinding body 1 from colliding, so as to avoid damage to the grinding body 1 caused by collision.

[0059] S14. The control device controls the grinding body to start running and sends a motor rotation signal to the welder control terminal, so that the welder control terminal controls the upper electrode of the electrode to be ground in the projection welder to press down according to the motor rotation signal and drives the grinding body to contact the lower electrode of the electrode to be ground.

[0060] In this embodiment, after the grinding body reaches the final target position, at this time, the lower end face of the grinding tool in the grinding body maintains a preset distance from the lower electrode of the projection welder. The control device controls the grinding body to start running, and then sends a motor rotation signal to the welder control terminal. When the welder control terminal receives the motor rotation signal, it sends a pressing-down signal to the projection welder according to a preset program to control the upper electrode in the projection welder to press down. The upper electrode contacts the upper end face of the grinding tool in the grinding body, and as the upper electrode drives the grinding body to press down, the lower end face of the grinding tool in the grinding body contacts the lower electrode. The electrode to be ground (i.e., the upper electrode and the lower electrode) clamps the grinding tool in the grinding body, and the grinding tool grinds the upper electrode and the lower electrode simultaneously.

[0061] S15. The buffer compensation mechanism compensates for the distance change between the grinding body and the electrode to be ground when the grinding body grinds the electrode to be ground.

[0062] In this embodiment, when the grinding body grinds the electrode to be ground, as the electrode to be ground becomes shorter due to grinding, the buffer compensation mechanism can compensate for the change in the distance between the grinding body and the electrode to be ground, so that the grinding body can automatically grind the electrode according to the wear degree of the electrode, avoiding the over-grinding problem that occurs when electrodes with inconsistent wear are ground with the maximum grinding amount, preventing the grinding amount from increasing, avoiding waste of resources, reducing the maintenance cost of the electrode, and extending the service life of the electrode.

[0063] S16. If the control device determines that the startup running duration of the grinding body is equal to the preset duration, it controls the grinding body to stop running and controls the buffer compensation mechanism and the cross-sliding module to reset to their corresponding initial states.

[0064] In this embodiment, if the control device determines that the startup running duration of the grinding body is equal to the preset duration, it means that the grinding body has ground the electrode to be ground for the preset duration, then the control device controls the grinding body to stop running, and the grinding is completed. Preferably, the preset duration is 1 - 3 s. Then, the control device controls the buffer compensation mechanism and the cross-sliding module to reset to their corresponding initial states, causing the corresponding cylinders in the buffer compensation mechanism and the cross-sliding module to reset.

[0065] More specifically, the specific process of the control device controlling the buffer compensation mechanism and the cross-sliding module to reset to their corresponding initial states is as follows: The control device controls the compensation cylinder in the buffer compensation mechanism to reset, and after receiving the safety signal sent by the compensation safety detection switch in the buffer compensation mechanism, it controls the first driving cylinder in the cross-sliding module to reset; if the control device receives the in-place signal corresponding to the reset of the first driving cylinder feedback by the first in-place detection switch in the cross-sliding module, it controls the second driving cylinder in the cross-sliding module to reset; if the control device receives the in-place signal corresponding to the reset of the second driving cylinder feedback by the second in-place detection switch in the cross-sliding module, the process ends and the grinding work is completed.

[0066] The automatic projection welding electrode grinding method provided by the present invention is applied to the automatic projection welding electrode grinding equipment described in any of the foregoing embodiments. By compensating for the change in the distance between the grinding body and the electrode to be ground through the buffer compensation mechanism, the grinding tool is closely fitted with the electrode to be ground, so that the grinding body can automatically grind the electrode according to the wear degree of the electrode, avoiding the over-grinding problem that occurs when electrodes with inconsistent wear are ground with the maximum grinding amount, preventing the grinding amount from increasing, avoiding waste of resources, reducing the maintenance cost of the electrode, and extending the service life of the electrode.

[0067] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An automatic grinding device for projection welding electrodes, characterized in that: include: Grinding body, buffer compensation mechanism, cross-sliding module and control device; The grinding body is flexibly connected to the buffer compensation mechanism, and the grinding body can move relative to the buffer compensation mechanism, the buffer compensation mechanism is arranged on the cross sliding module, and the control device is communicatively connected with the grinding body, the buffer compensation mechanism and the cross sliding module; Wherein, the control device is used to control the grinding body, the buffer compensation mechanism and the cross sliding module; the cross sliding module is used to drive the buffer compensation mechanism and the grinding body to move in the horizontal direction and the vertical direction; the buffer compensation mechanism is used to drive the grinding body to move up and down, and compensate for the change in the distance between the grinding body and the electrode to be ground; the buffer compensation mechanism is also used to detect whether the grinding body is in a safe position; the grinding body is used to grind the electrode to be ground.

2. The automatic grinding equipment for projection welding electrodes according to claim 1, characterized in that: The buffer compensation mechanism includes a guide component, a cylinder component, an elastic component and a compensation safety detection switch; The bottom of the guide assembly is arranged on the cross sliding module, one end of the cylinder assembly is connected to the guide assembly, the other end of the cylinder assembly is connected to the elastic assembly, the elastic assembly is connected to the top of the grinding body, the grinding body is connected to the guide assembly, and the grinding body can move up and down along the guide assembly; The compensation safety detection switch is arranged on the side of the guide assembly; the cylinder assembly and the compensation safety detection switch are both communicatively connected with the control device.

3. The automatic grinding equipment for projection welding electrodes according to claim 2, characterized in that: The guide assembly includes a bottom plate, a first bearing seat, a second bearing seat, a guide rod, a connecting bracket and a side plate bracket; One end of the bottom plate is arranged on the cross sliding module, and the first bearing seat is arranged on the other end of the bottom plate; one end of the guide rod is passed through the first bearing seat, and the other end of the guide rod is passed through the second bearing seat; the connecting bracket is connected to the guide rod, and the connecting bracket is located between the first bearing seat and the second bearing seat, and the grinding body is connected to the connecting bracket; the side plate bracket is connected to the first bearing seat and the second bearing seat, and the compensation safety detection switch is arranged on the side plate bracket.

4. The automatic grinding equipment for projection welding electrodes according to claim 2, characterized in that: The cylinder assembly includes a cylinder mounting plate, a compensating cylinder and an extended shaft, and the elastic assembly includes a spring sleeve and a buffer spring; The cylinder mounting plate is connected to the guide assembly, the compensation cylinder is connected to the cylinder mounting plate, the extension shaft is connected to the compensation cylinder, the buffer spring is sleeved on the extension shaft, the buffer spring and the extension shaft are both arranged inside the spring sleeve, and the bottom of the spring sleeve is connected to the top of the grinding body.

5. The automatic grinding equipment for projection welding electrodes according to claim 1, characterized in that: The cross sliding module includes a horizontal sliding component and a vertical sliding component; one end of the horizontal sliding component is arranged on the vertical sliding component, and the buffer compensation mechanism is arranged on the other end of the horizontal sliding component, and the horizontal sliding component and the vertical sliding component are both communicatively connected with the control device; wherein, the horizontal sliding component is used to drive the buffer compensation mechanism and the grinding body to move in the horizontal direction; and the vertical sliding component is used to drive the buffer compensation mechanism and the grinding body to move in the vertical direction.

6. The automatic grinding equipment for projection welding electrodes according to claim 5, characterized in that: The horizontal sliding assembly includes a slider connecting assembly, a horizontal slide rail, a connecting support plate, a first driving cylinder and a first in-position detection switch; One end of the slider connecting assembly is connected to the buffer compensation mechanism, and the other end of the slider connecting assembly is slidably connected to the horizontal slide rail, the horizontal slide rail is connected to the top of the connecting support plate, and the bottom of the connecting support plate is connected to the vertical sliding assembly, the first driving cylinder is connected to the side of the connecting support plate, the first driving cylinder is also connected to the slider connecting assembly, and the first in-place detection switch is connected to the first driving cylinder; the first driving cylinder and the first in-place detection switch are both communicatively connected to the control device.

7. The automatic grinding equipment for projection welding electrodes according to claim 5, characterized in that: The vertical sliding assembly includes a column assembly, a vertical slide rail, a vertical slider, a support plate, a cylinder holding bracket, a second driving cylinder and a second in-position detection switch; The vertical slide rail is connected to the column assembly, one end of the vertical slider is slidably connected to the vertical slide rail, the other end of the vertical slider is connected to the support plate, and the top of the support plate is connected to the horizontal sliding assembly; the cylinder holding bracket is connected to the side of the column assembly away from the vertical slide rail, and the cylinder holding bracket is also connected to the other end of the horizontal sliding assembly and the second driving cylinder, and the second in-position detection switch is connected to the second driving cylinder; the second driving cylinder and the second in-position detection switch are both communicatively connected to the control device.

8. The automatic grinding equipment for projection welding electrodes according to claim 1, characterized in that: The grinding body comprises a grinding tool, a gear box and a grinding power motor; The gear box is provided with a mounting through hole, the grinding tool is arranged in the mounting through hole, the gear box is flexibly connected to the buffer compensation mechanism, and the grinding power motor is connected to the gear box.

9. The automatic grinding equipment for projection welding electrodes according to claim 1, characterized in that: It also includes a chip blowing and collecting device, which includes a negative pressure device, a steel wire hose and a storage bucket; The negative pressure device is connected to the grinding body, and is also connected to the storage bucket through the steel wire hose. The negative pressure device is communicatively connected to the control device; wherein the negative pressure device is used to suck out waste chips generated by the grinding body when grinding the electrode into the storage bucket.

10. A method for automatically grinding a projection welding electrode, characterized in that: The automatic grinding device for projection welding electrodes according to any one of claims 1 to 9 comprises a grinding body, a buffer compensation mechanism, a cross-sliding module and a control device; the method comprises: If the control device receives a grinding signal sent by the welding machine control terminal, it controls the cross sliding module to drive the buffer compensation mechanism and the grinding body to move in the vertical direction, so that the grinding body moves to a preset intermediate working position; If the control device receives the safety signal continuously sent by the buffer compensation mechanism when the grinding body moves along the vertical direction and receives the first in-position signal sent by the cross sliding module, the control device controls the cross sliding module to drive the buffer compensation mechanism and the grinding body to move along the horizontal direction, so that the grinding body moves to a preset grinding working position; wherein the safety signal is used to indicate that the grinding body is in a safe position; If the control device receives the safety signal continuously sent by the buffer compensation mechanism when the grinding body moves along the horizontal direction and receives the second in-position signal sent by the cross sliding module, the control device controls the buffer compensation mechanism to drive the grinding body to descend a preset distance; The control device controls the grinding body to start running, and sends a motor rotation signal to the welding machine control terminal, so that the welding machine control terminal controls the upper electrode of the electrode to be ground in the projection welding machine to press down according to the motor rotation signal and drives the grinding body to contact with the lower electrode of the electrode to be ground; The buffer compensation mechanism compensates for the change in the distance between the grinding body and the electrode to be ground when the grinding body is grinding the electrode to be ground; If the control device determines that the startup operation time of the grinding body is equal to the preset time, the control device controls the grinding body to stop running, and controls the buffer compensation mechanism and the cross sliding module to reset to the corresponding initial state.

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