A weld grinding device for welding automobile parts

Abstract

The present invention belongs to the technical field of automobiles, and specifically relates to a weld grinding device for welding automobile parts. It includes a device table, on the upper surface of which a protective cover is fixedly connected. Both the device table and the protective cover are provided with through holes, and a grinding mechanism is arranged on the device table; the grinding mechanism includes a rotating ring, which is rotatably connected to the upper surface of the device table through a bearing. A main gear is fixedly connected to the upper surface of the rotating ring, and a lower grinding cylinder is in interference fit with the main gear. A plurality of sub-gears are rotatably connected to the upper surface of the device table through bearings, and the sub-gears are engaged with the main gear. A gear ring is rotatably connected to the upper surface of the device table through a bearing, and the gear ring is engaged with the sub-gears. A plurality of connecting rods are fixedly connected to the upper surface of the gear ring. The grinding device of the present invention has a better grinding effect and a higher degree of automation, automatically clamps and grinds, and automatically detects after grinding is completed, greatly improving the automation degree of the device and the grinding efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of automobiles, in particular to a weld grinding device for welding automobile parts. Background Art

[0002] Auto parts are the various units that constitute the overall auto parts processing, as well as the products that serve the auto parts processing. Auto parts are diverse and come in many categories. It is estimated that an average car is assembled from about 20,000 parts, while some cars with more complex structures require more than 30,000 parts. The connections between some parts in the car are usually connected by welding. For example, the connection of the steering column and some shafts need to be connected by welding. After welding is completed, in order to ensure the continuity of the connection between the two parts and the appearance of the parts, the welds usually need to be polished and smoothed to ensure their normal operation.

[0003] In the prior art, when existing shaft components are ground after welding, the grinding device can often only perform simple rotational grinding, and the grinding effect is average. During the grinding process, the processing personnel need to take out the parts from time to time to observe the grinding situation to decide whether to continue grinding. This is not only cumbersome to operate, but also greatly affects the processing efficiency. Summary of the Invention

[0004] The present invention provides a weld seam grinding device for automobile parts welding, which can grind the weld seams of automobile parts and solve the problems of existing grinding devices, such as poor grinding effect, complicated grinding operation and great influence on processing efficiency.

[0005] The technical solution of the present invention is described as follows in conjunction with the accompanying drawings:

[0006] A weld grinding device for automobile parts welding includes a device platform 1, a protective cover 2 and a grinding mechanism; the protective cover 2 is fixedly connected to the upper surface of the device platform 1, and both the device platform 1 and the protective cover 2 are provided with through holes 20; the device platform 1 is provided with a grinding mechanism.

[0007] Further, the polishing mechanism includes a rotating ring 3; the rotating ring 3 is rotatably connected to the upper surface of the device table 1 through a bearing; a main gear 4 is fixedly connected to the upper surface of the rotating ring 3; the main gear 4 is in interference fit with a lower polishing cylinder 5; several secondary gears 6 are rotatably connected to the upper surface of the device table 1 through bearings; the secondary gears 6 are meshed with the main gear 4; a gear ring 7 is rotatably connected to the upper surface of the device table 1 through a bearing; the gear ring 7 is meshed with the secondary gears 6; several connecting rods 8 are fixedly connected to the upper surface of the gear ring 7; the connecting rods 8 are commonly fixedly connected to an upper polishing cylinder 9; several first polishing pieces 10 are fixedly connected to the inner side wall of the upper polishing cylinder 9; several first conductive blocks 11 are fixedly embedded in the lower surface of the upper polishing cylinder 9; a second conductive block 12 is fixedly embedded in the upper surface of the lower polishing cylinder 5; a servo motor 21 is fixedly connected to the lower surface of the device table 1 through a bracket; an output end of the servo motor 21 is fixedly connected to a rotating shaft 22; the rotating shaft 22 is rotatably connected to the device table 1 through a bearing in a penetrating manner; the rotating shaft 22 is in interference fit with a driving gear 23; the driving gear 23 is meshed with the gear ring 7.

[0008] Further, the polishing mechanism further includes a plurality of functional grooves 13; the functional grooves 13 are opened on the inner side wall of the lower polishing cylinder 5; several functional blocks 14 are slidably connected to the lower polishing cylinder 5 through the functional grooves 13; an installation groove 16 is opened on the inner side wall of the functional groove 13; a first electromagnet 19 is fixedly connected to the inner wall of the installation groove 16; the first electromagnet 19, the first conductive block 11, and the second conductive block 12 are electrically connected through wires; a magnetic block 17 is slidably connected in the installation groove 16; a driving rod 18 is fixedly connected between the magnetic block 17 and the corresponding functional block 14; a second polishing piece 15 is fixedly connected to one end of the functional block 14 located outside the functional groove 13.

[0009] Further, a clamping mechanism is provided on the protective cover 2; the clamping mechanism includes a sliding groove 24, and the sliding groove 24 is opened on the top wall of the protective cover 2; two clamping blocks 25 are slidably connected to the protective cover 2 through the sliding groove 24; clamping rings 26 are fixedly connected to the side walls of the opposite sides of the two clamping blocks 25; a liquid groove 31 is opened on the inner wall of the sliding groove 24; a piston 32 is hermetically slidably connected in the liquid groove 31; the piston 32 is fixedly connected to the corresponding sliding groove 24 through a rod; a cavity 33 is opened in the protective cover 2; a push plate 34 is hermetically slidably connected in the cavity 33; hydraulic oil is filled between the push plate 34 and the inner top wall of the cavity 33; a threaded cylinder 36 is rotatably connected to the protective cover 2 through a bearing; one end of the threaded cylinder 36 extends through the cavity 33, and the other end extends through the protective cover 2; a screw rod 37 is threadedly connected to the threaded cylinder 36; the screw rod 37 is fixedly connected to the lower surface of the push plate 34; two communicating pipes 35 are fixedly connected to the protective cover 2; the communicating pipes 35 communicate the cavity 33 with the corresponding liquid groove 31.

[0010] Further, there are two sliding grooves 24.

[0011] Further, a groove 38 is opened on the lower surface of the threaded cylinder 36; the rotating shaft 22 is rotatably connected to the inner top wall of the groove 38 through a one-way bearing; a damping ring 39 is fixedly connected to the inner side wall of the groove 38; the rotating shaft 22 is hermetically slidably connected to the damping ring 39.

[0012] Further, a sensing and control mechanism is provided in the protective cover 2; the sensing and control mechanism includes a control cavity 40 opened in the protective cover 2; a button switch 43 and a second electromagnet 42 are respectively fixedly connected to the inner top wall and the inner bottom wall of the control cavity 40; a magnetic column 41 is slidably connected in the control cavity 40; sensing grooves 27 are opened on the side walls of the opposite sides of the two clamping rings 26; sensing blocks 28 are slidably connected to the clamping rings 26 through the sensing grooves 27; a force-sensitive resistor 29 is fixedly connected to the inner side wall of the sensing groove 27; the force-sensitive resistor 29 is electrically connected to the second electromagnet 42 through a wire; clamping plates 30 are fixedly connected to the side walls of the opposite sides of the two sensing blocks 28; the button switch 43 is connected to the servo motor 21 through a PLC control circuit.

[0013] Further, the cross sections of the sensing blocks 28 and the sensing grooves 27 are both T-shaped.

[0014] Further, rubber pads are glued to the side walls of the opposite sides of the two clamping plates 30.

[0015] The beneficial effects of the present invention are:

[0016] 1) The present invention forms a planetary gear set through a main gear, a secondary gear, and a gear ring. The main gear drives the lower grinding cylinder to rotate, and the gear ring drives the upper grinding cylinder to rotate, such that the rotation speed of the lower grinding cylinder is faster than that of the upper grinding cylinder. Thus, the upper grinding cylinder preliminarily grinds the components, and the lower grinding cylinder with a faster rotation speed finely grinds the components. Furthermore, through the cooperation of the two grinding cylinders, compared with the prior art where only a rotating grinding cylinder is used for grinding, a better grinding effect can be obtained;

[0017] 2) During the relative rotation of the upper grinding cylinder and the lower grinding cylinder of the present invention, the first conductive block also rotates relative to the second conductive block, so that the first conductive block periodically contacts the second conductive block, thereby enabling the first electromagnet to be periodically powered on and off. Furthermore, the magnetic block moves rapidly back and forth. The driving rod drives the functional block to move rapidly back and forth, such that during the rotation of the lower grinding cylinder, the second grinding sheet is driven by the functional block to continuously move rapidly back and forth to further finely grind the components, thereby obtaining a better grinding effect;

[0018] 3) When grinding, the present invention is driven by a servo motor. At the initial stage of the rotation of the servo motor, the friction force between the servo motor and the damping ring drives the threaded cylinder to rotate. Then, through the threaded connection between the threaded cylinder and the screw rod, the push plate slides upward, and through the transmission of hydraulic oil, the two clamping rings move relative to each other to automatically clamp the parts to be ground, making the automation degree of the device higher;

[0019] 4) Due to the setting of the damping ring in the present invention, during the clamping process, when the clamping force reaches a certain value, the friction force is no longer sufficient to drive the threaded cylinder to rotate. At this time, the clamping is completed and grinding begins, thereby ensuring that while automatically clamping, the clamping force for each clamping is automatically controlled to ensure stable clamping and further improving the automation degree of the device;

[0020] 5) While grinding, due to the contact between the grinding sheet and the components, the rotation of the grinding sheet causes the components to be subjected to a rotational torque. After the components are clamped, the rotational torque received by the rotating components is applied to the force-sensitive resistor through the sensing block. As grinding progresses, this rotational torque gradually decreases, so that the pressure received by the force-sensitive resistor gradually decreases. The grinding degree is sensed by the force-sensitive resistor. After grinding is completed, the machine automatically stops and proceeds to the next operation, thus eliminating the need to stop and observe the grinding degree from time to time, thereby greatly improving the processing efficiency. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 The structure of a weld grinding device for welding automotive parts proposed by the present invention

[0023] Schematic diagram;

[0024] Figure 2 is Figure 1 The enlarged view at position A in

[0025] Figure 3 is Figure 1 The enlarged view at position B in

[0026] Figure 4 is Figure 1 The sectional view taken along line C-C in

[0027] Figure 5 is Figure 4 The enlarged view at position D in

[0028] Figure 6 is Figure 1 The sectional view taken along line E-E in

[0029] Figure 7 is Figure 6 The enlarged view at position F in

[0030] In the figure:

[0031] 1. Device table; 2. Protective cover; 3. Rotating ring; 4. Main gear; 5. Lower grinding cylinder; 6. Sub-gear; 7. Tooth ring; 8. Connecting rod; 9. Upper grinding cylinder; 10. First grinding piece; 11. First conductive block; 12. Second conductive block; 13. Function slot; 14. Function block; 15. Second grinding piece; 16. Installation slot; 17. Magnet; 18. Driving rod; 19. First electromagnet; 20. Through hole; 21. Servo motor; 22. Rotating shaft; 23. Driving gear; 24. Sliding slot; 25. Clamping block; 26. Clamping ring; 27. Sensing slot; 28. Sensing block; 29. Force-sensitive resistor; 30. Clamping plate; 31. Liquid tank; 32. Piston; 33. Cavity; 34. Pushing plate; 35. Connecting pipe; 36. Threaded cylinder; 37. Screw; 38. Groove; 39. Damping ring; 40. Control cavity; 41. Magnetic column; 42. Second electromagnet; 43. Button switch. Specific implementation manners

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0033] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0034] Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0035] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0036] In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0039] Refer to Figure 1-7, a weld grinding device for automobile parts welding, including a device table 1. A protective cover 2 is fixedly connected to the upper surface of the device table 1. Through holes 20 are provided on both the device table 1 and the protective cover 2. A grinding mechanism is arranged on the device table 1;

[0040] The grinding mechanism includes a rotating ring 3. The rotating ring 3 is rotatably connected to the upper surface of the device table 1 through a bearing. A main gear 4 is fixedly connected to the upper surface of the rotating ring 3. A lower grinding cylinder 5 is in interference fit with the main gear 4. A plurality of sub-gears 6 are rotatably connected to the upper surface of the device table 1 through bearings. The sub-gears 6 are meshed with the main gear 4. A gear ring 7 is rotatably connected to the upper surface of the device table 1 through a bearing. As Figure 4 shown, teeth are provided on both the inner ring wall and the outer ring wall of the gear ring 7. The teeth on its inner ring wall are meshed with the sub-gears 6, while the teeth on its outer ring wall are meshed with a driving gear 23. The gear ring 7 is meshed with the sub-gears 6. A plurality of connecting rods 8 are fixedly connected to the upper surface of the gear ring 7. The connecting rods 8 are commonly fixedly connected to an upper grinding cylinder 9. A plurality of first grinding pieces 10 are fixedly connected to the inner side wall of the upper grinding cylinder 9. A plurality of first conductive blocks 11 are fixedly embedded in the lower surface of the upper grinding cylinder 9. A second conductive block 12 is fixedly embedded in the upper surface of the lower grinding cylinder 5. The lower surface of the device table 1 is fixedly connected to a servo motor 21 through a bracket.

[0041] The output end of the servo motor 21 is fixedly connected to a rotating shaft 22. The rotating shaft 22 is rotatably connected to the device table 1 through a bearing in a penetrating manner. A driving gear 23 is in interference fit with the rotating shaft 22. The driving gear 23 is meshed with the gear ring 7. A planetary gear set is formed by the main gear 4, the sub-gears 6 and the gear ring 7. The main gear 4 drives the lower grinding cylinder 5 to rotate, and the gear ring 7 drives the upper grinding cylinder 9 to rotate, so that the rotation speed of the lower grinding cylinder 5 is faster than that of the upper grinding cylinder 9. Thus, the upper grinding cylinder 9 preliminarily grinds the parts, and the lower grinding cylinder 5 with a faster rotation speed finely grinds the parts. Furthermore, through the cooperation of the two grinding cylinders, compared with the prior art where only a rotating grinding cylinder is used for grinding, a better grinding effect can be obtained.

[0042] The grinding mechanism further includes a plurality of functional grooves 13, which are opened on the inner side wall of the lower grinding cylinder 5. The lower grinding cylinder 5 is slidably connected with a number of functional blocks 14 through the functional grooves 13. The inner side wall of the functional groove 13 is provided with an installation groove 16, and the inner wall of the installation groove 16 is fixedly connected with a first electromagnet 19. The first electromagnet 19, the first conductive block 11, and the second conductive block 12 are electrically connected through wires. When the first conductive block 11 contacts the second conductive block 12, the first electromagnet 19 can be energized. Thus, during the relative movement of the first conductive block 11 and the second conductive block 12, the first conductive block 11 intermittently contacts the second conductive block 12, so that the first electromagnet 19 is intermittently energized. A magnetic block 17 is slidably connected in the installation groove 16, and a driving rod 18 is fixedly connected between the magnetic block 17 and the corresponding functional block 14. One end of the functional block 14 located outside the functional groove 13 is fixedly connected with a second grinding piece 15. During the relative rotation of the upper grinding cylinder 9 and the lower grinding cylinder 5, the first conductive block 11 also rotates relative to the second conductive block 12, so that the first conductive block 11 periodically contacts the second conductive block 12, and the first electromagnet 19 is periodically energized and de-energized. When the first electromagnet 19 is energized, a magnetic repulsive force is generated on the magnetic block 17. When the first electromagnet 19 is de-energized, since the electromagnet becomes an iron core after power-off, at this time, the magnetic block 17 generates a magnetic attractive force on the first electromagnet 19. Furthermore, the magnetic block 17 rapidly reciprocates under the action of the magnetic attractive force and the magnetic repulsive force, drives the functional block 14 to rapidly reciprocate through the driving rod 18, and makes the second grinding piece 15 continuously and rapidly reciprocate through the functional block 14 during the rotation of the lower grinding cylinder 5, so as to further finely grind the parts and obtain a better grinding effect.

[0043] The protective cover 2 is provided with a clamping mechanism. The clamping mechanism includes two sliding grooves 24, which are opened on the top wall of the protective cover 2. The protective cover 2 is slidably connected with two clamping blocks 25 through the sliding grooves 24. Clamping rings 26 are fixedly connected to the side walls of the two clamping blocks 25 facing each other. A liquid groove 31 is opened on the inner wall of the sliding groove 24, and a piston 32 is hermetically slidably connected in the liquid groove 31. The piston 32 is fixedly connected to the corresponding sliding groove 24 through a rod. A cavity 33 is opened in the protective cover 2, and a push plate 34 is hermetically slidably connected in the cavity 33. Hydraulic oil is filled between the push plate 34 and the top wall in the cavity 33. The protective cover 2 is rotatably connected through a bearing with a threaded cylinder 36. One end of the threaded cylinder 36 extends through and into the cavity 33, and the other end extends through and into the protective cover 2. A screw rod 37 is threadedly connected to the threaded cylinder 36, and the screw rod 37 is fixedly connected to the lower surface of the push plate 34. Two communicating pipes 35 are fixedly connected through the protective cover 2, and the communicating pipes 35 connect the cavity 33 with the corresponding liquid grooves 31. During grinding, it is driven by the servo motor 21, and the servo motor

[0044] At the initial stage of rotation, the rotating shaft 22 drives the threaded cylinder 36 to rotate through the frictional force with the damping ring 39. Then, through the threaded connection between the threaded cylinder 36 and the screw 37, the push plate 34 slides upward, and through the transmission of hydraulic oil, the two clamping rings 26 move relatively to automatically clamp the part to be polished, making the automation degree of the device higher.

[0045] A groove 38 is formed on the lower surface of the threaded cylinder 36. The rotating shaft 22 is rotatably connected to the inner top wall of the groove 38 through a one-way bearing. The one-way bearing enables the rotating shaft 22 to drive the threaded cylinder 36 to rotate only in one direction, while in the other direction, it will rotate relative to the threaded cylinder 36. A damping ring 39 is fixedly connected to the inner side wall of the groove 38. Through the setting of the damping ring 39, during the clamping process, when the clamping force reaches a certain value, the frictional force is not sufficient to drive the threaded cylinder 36 to rotate anymore. At this time, the clamping is completed and the polishing starts. Thus, while ensuring automatic clamping, the clamping force for each clamping is automatically controlled to ensure stable clamping and further improve the automation degree of the device. The rotating shaft 22 is slidably connected through the damping ring 39.

[0046] A sensing and control mechanism is arranged inside the protective cover 2. The sensing and control mechanism includes a control cavity 40 opened inside the protective cover 2. A button switch 43 and a second electromagnet 42 are respectively fixedly connected to the top wall and the bottom wall inside the control cavity 40. A magnetic column 41 is slidably connected inside the control cavity 40. After the second electromagnet 42 is energized, it generates a magnetic repulsive force on the magnetic column 41, and the magnetic repulsive force causes the magnetic column 41 to slide upward. Sensing grooves 27 are formed on the side walls of the opposite sides of the two clamping rings 26. The clamping rings 26 are slidably connected with sensing blocks 28 through the sensing grooves 27. A force-sensitive resistor 29 is fixedly connected to the inner side wall of the sensing groove 27. The resistance value of the force-sensitive resistor 29 increases as the pressure it receives increases. The force-sensitive resistor 29 and the second electromagnet 42 are electrically connected through a wire. The magnetic force of the second electromagnet 42 is controlled by the force-sensitive resistor 29. The greater the pressure received by the force-sensitive resistor 29, the smaller the magnetic force of the second electromagnet 42, and vice versa. Clamping plates 30 are fixedly connected to the side walls of the opposite sides of the two sensing blocks 28. The button switch 43 and the servo motor 21 are connected through a PLC control circuit. The PLC control circuit causes the servo motor 21 to reverse a certain number of turns and then continue to rotate forward after the button switch 43 is triggered for the first time. When the button switch 43 is pressed for the second time, the servo motor 21 reverses directly to reset the clamping block 25. The PLC control circuit is a prior art and will not be elaborated here. During grinding, due to the contact between the first grinding piece 10, the second grinding piece 15 and the parts, the rotation of the first grinding piece 10 and the second grinding piece 15 will cause the parts to receive a rotational torque. After the parts are clamped, the rotational torque received by the rotating parts will be applied to the force-sensitive resistor 29 through the sensing block 28. As grinding progresses, this rotational torque will gradually decrease, so that the pressure received by the force-sensitive resistor 29 gradually decreases. The grinding degree is sensed through the force-sensitive resistor 29. After grinding is completed, the machine automatically stops and proceeds to the next operation, thus eliminating the need to stop and observe the grinding degree from time to time, greatly improving the processing efficiency.

[0047] The cross-sections of the sensing block 28 and the sensing groove 27 are both T-shaped. The T-shaped sensing block 28 and the sensing groove 27 are more stably connected, preventing them from separating. Rubber pads are glued to the side walls of the opposite sides of the two clamping plates 30. The rubber pads increase the friction between the clamping plates 30 and the parts, thus ensuring a better clamping effect.

[0048] In the present invention, the component to be polished is inserted into the protective cover 2 through the through hole 20, so that the area to be polished is located inside the upper polishing cylinder 9. At this time, the servo motor 21 is turned on, and the servo motor 21 drives the drive shaft 23 to rotate. At the initial stage of the rotation of the drive shaft 23, due to the frictional force between the drive shaft 23 and the damping ring 39, the threaded cylinder 36 rotates together with the rotating shaft 23. The threaded cylinder 36 makes the screw rod 37 move upward through threaded connection, thereby pushing the push plate 34 to slide upward. Through the transmission of hydraulic oil, the two pistons 32 slide, and then the two clamping blocks 25 move relatively. The clamping blocks 25 drive the corresponding clamping rings 26 to move relatively, move towards the component, and clamp the component through the clamping plate 30. As the clamping force continuously increases until it reaches the required value, at this time, the frictional force between the rotating shaft 22 and the damping ring 39 can no longer drive the threaded cylinder 36 to rotate, and the clamping is completed at this time.

[0049] After the clamping is completed, the polishing begins. The drive gear 23 rotates to drive the gear ring 7 meshing with it to rotate. The rotation of the gear ring 7 drives the secondary gear 6 meshing with it to rotate. The rotation of the secondary gear 6 will drive the main gear 4 meshing with it to rotate, making the main gear 4 rotate faster relative to the gear ring 7. The rotation of the gear ring 7 drives the upper polishing cylinder 9 to rotate through the connecting rod 8, and the welded joint is preliminarily polished by the second polishing piece 15. During the polishing process, due to the contact between the second polishing piece 15 and the component, the rotation of the second polishing piece 15 will cause the component to receive a rotational torque. After the component is clamped, the rotational torque received by the rotating component will be applied to the force-sensitive resistor 29 through the sensing block 28. As the polishing progresses, as the welded joint is polished flat, the contact pressure between the second polishing piece 15 and the welded joint continuously decreases, and this rotational torque will gradually become smaller, so that the pressure received by the force-sensitive resistor 29 gradually becomes smaller. The polishing degree is sensed through the force-sensitive resistor 29. When the preliminary polishing is completed, at this time, the pressure received by the force-sensitive resistor 29 is the smallest, that is, the component and the second polishing piece 15 hardly contact each other. At this time, the resistance value of the force-sensitive resistor 29 decreases to make the magnetic repulsion force of the second electromagnet 42 on the magnetic column 41 cause the magnetic column 41 to contact the button switch 43.

[0050] After the initial contact, the servo motor 21 rotates in reverse by a certain angle. At this time, reversing the rotating shaft 22 can directly drive the threaded cylinder 36 to rotate through the one-way bearing, so that the clamping ring 26 separates from the component by a small distance. At this time, the component slides down under the action of gravity, so that the welded joint slides into the lower polishing cylinder 5. At this time, the servo motor 21 rotates forward again, clamps the component, and at the same time drives the lower polishing cylinder 5 to rotate to start fine polishing.

[0051] During fine polishing, when the upper polishing cylinder 9 and the lower polishing cylinder 5 rotate relatively, it will also cause

[0052] The first conductive block 11 rotates relative to the second conductive block 12, so that the first conductive block 11 periodically contacts the second conductive block 12, thereby enabling the first electromagnet 19 to be periodically powered on and off. When the first electromagnet 19 is powered on, a magnetic repulsive force is generated on the magnetic block 17. When the first electromagnet 19 is powered off, since the electromagnet becomes an iron core after being powered off, at this time, the magnetic block 17 will generate a magnetic attractive force on the first electromagnet 19. As a result, the magnetic block 17 moves rapidly back and forth under the action of the magnetic attractive force and the magnetic repulsive force, and drives the functional block 14 to move rapidly back and forth through the driving rod 18. During the rotation of the lower grinding cylinder 5, the second grinding piece 15 is driven by the functional block 14 to continuously move rapidly back and forth, so as to further finely grind the parts.

[0053] As the grinding progresses, the rotational torque of the second grinding piece 15 on the parts also gradually decreases, so that the magnetic column 41 is disengaged from the push button switch 43 again. At this time, the servo motor 21 reverses until the clamping block 25 is reset, and the clamping of the parts is released. The parts fall through the through hole 20 of the device table 1 under the action of gravity. At this time, insert the next part to be ground again and continue the above steps for grinding.

[0054] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the protection scope of the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, any person skilled in the art within the technical scope disclosed by the present invention can make equivalent substitutions or changes according to the technical solution and inventive concept of the present invention. These simple modifications all fall within the protection scope of the present invention.

[0055] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0056] In addition, any combination can be made between various different embodiments of the present invention as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. A weld grinding device for welding automobile parts, characterized in that, It includes a device table (1), a protective cover (2) and a grinding mechanism; on the upper surface of the device table (1), a protective cover (2) is fixedly connected, and through holes (20) are provided on both the device table (1) and the protective cover (2); a grinding mechanism is arranged on the device table (1). The grinding mechanism includes a rotating ring (3); the rotating ring (3) is rotatably connected to the upper surface of the device table (1) through a bearing; a main gear (4) is fixedly connected to the upper surface of the rotating ring (3); an upper grinding cylinder (5) is in interference fit with the main gear (4); several secondary gears (6) are rotatably connected to the upper surface of the device table (1) through bearings; the secondary gears (6) are meshed with the main gear (4); a toothed ring (7) is rotatably connected to the upper surface of the device table (1) through a bearing; the toothed ring (7) is meshed with the secondary gears (6); several connecting rods (8) are fixedly connected to the upper surface of the toothed ring (7); the connecting rods (8) are commonly fixedly connected to an upper grinding cylinder (9); several first grinding pieces (10) are fixedly connected to the inner side wall of the upper grinding cylinder (9); several first conductive blocks (11) are fixedly embedded in the lower surface of the upper grinding cylinder (9); a second conductive block (12) is fixedly embedded in the upper surface of the lower grinding cylinder (5); a servo motor (21) is fixedly connected to the lower surface of the device table (1) through a bracket; the output end of the servo motor (21) is fixedly connected to a rotating shaft (22); the rotating shaft (22) is rotatably connected to the device table (1) through a bearing in a penetrating manner; a driving gear (23) is in interference fit with the rotating shaft (22); the driving gear (23) is meshed with the toothed ring (7); the grinding mechanism further includes a plurality of functional grooves (13); the functional grooves (13) are opened on the inner side wall of the lower grinding cylinder (5); several functional blocks (14) are slidably connected to the lower grinding cylinder (5) through the functional grooves (13); an installation groove (16) is opened on the inner side wall of the functional groove (13); a first electromagnet (19) is fixedly connected to the inner wall of the installation groove (16); the first electromagnet (19), the first conductive blocks (11) and the second conductive block (12) are electrically connected through wires; a magnetic block (17) is slidably connected in the installation groove (16); a driving rod (18) is fixedly connected between the magnetic block (17) and the corresponding functional block (14); the end of the functional block (14) located outside the functional groove (13) is fixedly connected to a second grinding piece (15).

2. The weld grinding device for automobile part welding according to claim 1, characterized in that, A clamping mechanism is provided on the protective cover (2); the clamping mechanism includes a sliding groove (24) which is opened on the top wall of the protective cover (2); two clamping blocks (25) are slidably connected to the protective cover (2) through the sliding groove (24); clamping rings (26) are fixedly connected to the side walls of the two clamping blocks (25) on the opposite sides; a liquid groove (31) is opened on the inner wall of the sliding groove (24); a piston (32) is hermetically slidably connected in the liquid groove (31); the piston (32) is fixedly connected to the corresponding clamping block (25) through a rod; a cavity (33) is opened in the protective cover (2); a push plate (34) is hermetically slidably connected in the cavity (33); hydraulic oil is filled between the push plate (34) and the inner top wall of the cavity (33); a threaded cylinder (36) is rotatably connected to the protective cover (2) through a bearing; one end of the threaded cylinder (36) extends into the cavity (33) through the protective cover (2), and the other end extends into the protective cover (2); a screw rod (37) is threadedly connected to the threaded cylinder (36); the screw rod (37) is fixedly connected to the lower surface of the push plate (34); two connecting pipes (35) are fixedly connected to the protective cover (2) through holes; the connecting pipes (35) communicate the cavity (33) with the corresponding liquid groove (31).

3. The weld grinding device for automobile parts welding according to claim 2, characterized in that, There are two sliding grooves (24).

4. A weld grinding device for automobile part welding according to claim 2, characterized in that, A groove (38) is opened on the lower surface of the threaded cylinder (36); the rotating shaft (22) is rotatably connected to the inner top wall of the groove (38) through a one-way bearing; a damping ring (39) is fixedly connected to the inner side wall of the groove (38); the rotating shaft (22) is hermetically slidably connected to the damping ring (39).

5. The weld grinding device for welding automotive parts according to claim 2, wherein A sensing and control mechanism is provided in the protective cover (2); the sensing and control mechanism includes a control cavity (40) opened in the protective cover (2); a button switch (43) and a second electromagnet (42) are respectively fixedly connected to the inner top wall and the inner bottom wall of the control cavity (40); a magnetic column (41) is slidably connected in the control cavity (40); sensing grooves (27) are opened on the side walls of the two clamping rings (26) on the opposite sides; sensing blocks (28) are slidably connected to the clamping rings (26) through the sensing grooves (27); a force-sensitive resistor (29) is fixedly connected to the inner side wall of the sensing groove (27); the force-sensitive resistor (29) is electrically connected to the second electromagnet (42) through a wire; clamping plates (30) are fixedly connected to the side walls of the two sensing blocks (28) on the opposite sides; the button switch (43) is connected to the servo motor (21) through a PLC control circuit.

6. The weld grinding device for welding automotive parts according to claim 5, wherein, The cross sections of the sensing blocks (28) and the sensing grooves (27) are both T-shaped.

7. A weld grinding device for welding automotive parts according to claim 5, characterized in that, Rubber pads are glued to the side walls of the two clamping plates (30) on the opposite sides.

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