Pure electric bending machine for steel machining

Abstract

The invention discloses a pure electric bending machine for steel machining, and relates to the technical field of bending machines, the pure electric bending machine for steel machining comprises a main machine and a rotating disc rotationally arranged on the main machine, and a removing mechanism is arranged on one side of the main machine; the cleaning mechanism comprises two vertical polishing brushes capable of moving up and down in a reciprocating manner and a plurality of double-sided abrasive paper capable of moving back and forth in a reciprocating manner, and is used for polishing the surface of the hollow square tube; according to the hollow square pipe bending device, through the designed removing mechanism, a corrosion layer, silt and foreign matter on the outer surface of a hollow square pipe can be efficiently removed through up-down reciprocating motion of a vertical polishing brush before bending, and scratches and pits caused by embedding of the foreign matter in the bending process are avoided; the front-back reciprocating motion of the double-faced abrasive paper can synchronously polish the contact faces between the hollow square pipes stacked in the vertical columns, the problem that the binding faces between the adjacent hollow square pipes cannot be processed only through outer surface polishing is solved, and 360-degree dead-corner-free cleaning of the hollow square pipes is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of bending machines, and specifically relates to a pure electric bending machine for steel processing. Background Art

[0002] A pure electric bending machine is a sheet metal processing equipment that replaces the traditional hydraulic system with a full electric servo drive. In the field of engineering construction, hollow square tubes are widely used as steel structure supports, frame connectors, etc. in temporary buildings, equipment bases, and pipeline systems. When bending some hollow square tubes, they can be directly bent by a bending machine. When bending, multiple hollow square tubes are stacked together and placed on the turntable in the bending machine, and are located between the bending shaft and the central shaft. At this time, the retaining frame limits the hollow square tubes, and then the turntable rotates to drive the bending shaft to rotate to bend the hollow square tubes.

[0003] In the prior art, due to the open-air operation mode often adopted at the construction site, such hollow square tubes are often stacked in unshielded sites and directly exposed to the environment of rain erosion, dust coverage, and industrial corrosive media (such as concrete alkaline substances, snow melting salts). The traditional process requires first transporting them to a professional workshop for pretreatment and then returning to the site for bending, which takes several hours to several days. In emergency projects, hollow square tubes often need to be directly taken from the open-air storage yard, with serious surface rust and adhesion of sediment particles, resulting in the formation of an uneven oxidation rust layer on the surface of the hollow square tubes and the adhesion of a large amount of hard particles such as sediment and gravel. Microscopic protrusions are formed on the surface of the hollow square tubes during bending, resulting in scratches or pits on the surface of the hollow square tubes after bending, affecting the bending quality and effect. Moreover, the sediment and foreign particles slide with the hollow square tubes, forming plow-shaped wear on the surfaces of the bending shaft and the central shaft, shortening the service life of the bending shaft and the central shaft. At the same time, the uneven thickness of the rust layer will cause the actual stress point to shift during the bending of the hollow square tubes, resulting in angular errors and affecting the bending effect. For this reason, we propose a pure electric bending machine for steel processing. Summary of the Invention

[0004] The purpose of the present invention is to provide a pure electric bending machine for steel processing to solve the technical problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A pure electric bending machine for steel processing, including a main machine and a turntable rotatably arranged on the main machine. A cleaning mechanism is arranged on one side of the main machine, and the cleaning mechanism includes:

[0006] Two vertically reciprocating grinding brushes and multiple double-sided sandpapers reciprocating back and forth for grinding the surface of the hollow square tube;

[0007] A top plate is fixedly arranged at the top of the vertical grinding brush. A vertical lead screw is arranged on the top plate, and a nut block is arranged outside the vertical lead screw for driving the vertical grinding brush to move up and down reciprocally.

[0008] A horizontal lead screw is rotatably arranged on one side of the main machine, and two nut seats are arranged outside the horizontal lead screw for driving the double-sided sandpaper to move back and forth reciprocally.

[0009] Preferably, a side plate is further fixedly arranged on one side of the main machine. A middle frame and a driving motor are respectively fixedly arranged on the side plate. A rotating rod is rotatably arranged on the middle frame, and a first transmission belt is sleeved between the rotating rod and the horizontal lead screw.

[0010] Preferably, a limiting plate is arranged inside the top plate. A first bevel gear is fixedly arranged at the end of the rotating rod, and a second bevel gear is fixedly arranged at the bottom of the vertical lead screw.

[0011] Preferably, a bottom plate is fixedly arranged at the top of the nut seat, and two vertical rods are fixedly arranged at the top of the bottom plate.

[0012] A sliding block frame is slidably arranged on the vertical rod. A second screw rod is connected to the inside of the sliding block frame by threads, and a first screw rod is also connected to the inside of the sliding block frame by threads.

[0013] Preferably, a support assembly for supporting the hollow square tube is arranged at the top of one side of the main machine. The support assembly includes a concave frame fixedly arranged at the top of one side of the side plate and two limiting plates arranged above the concave frame.

[0014] A support plate is arranged inside the limiting plate. A return plate is fixedly arranged at the bottom of the limiting plate, and a locking stud is connected to the bottom of the return plate by threads.

[0015] Preferably, a groove is formed inside the limiting plate. Concave rubber is fixedly arranged on the inner wall of the groove, and multiple groups of ball bearings are rotatably arranged on the top of the support plate.

[0016] Preferably, the cleaning mechanism includes two rotating columns and grinding columns. A plurality of collar rings are sleeved outside the rotating columns, double-sided grinding sheets are fixedly arranged outside the collar rings, and a bottom column is fixedly arranged at the bottom of the grinding column.

[0017] Preferably, a connecting belt is sleeved between the bottoms of the two rotating columns. A plate frame is fixedly arranged at the top of one side of the main machine, and an installation motor is fixedly arranged at the bottom of the plate frame.

[0018] Preferably, a worm gear is sleeved outside the bottom column, and a worm gear ring is meshed with the outside of the worm gear.

[0019] A grinding motor, a vertical plate and a convex shaft are respectively arranged at the top of the plate frame.

[0020] An installation bearing is sleeved outside the bottom column, and two threaded rings are connected to the outside of the installation bearing by threads.

[0021] Preferably, a servo motor is arranged inside the main machine, a bending shaft is fixedly arranged at the working end of the servo motor, and a central shaft is fixedly arranged at the top of the turntable.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] (1) Through the designed cleaning mechanism of the present invention, before bending, the vertical grinding brush can efficiently remove the rust layer, sediment and foreign matters on the outer surface of the hollow square pipe through reciprocating up and down movement, avoiding scratches and pits caused by the embedding of foreign matters during bending. The reciprocating back and forth movement of the double-sided sandpaper can synchronously grind the contact surface between the hollow square pipes stacked in a vertical column, solve the problem that the contact surface between adjacent hollow square pipes cannot be processed only by grinding the outer surface, realize 360° dead-angle-free cleaning of the hollow square pipe, reduce the friction and wear between the bending shaft, the central shaft and the surface of the hollow square pipe, and the uniform removal of the rust layer ensures accurate stress points during pipe bending, reduces stress concentration and abnormal wear caused by local rust, and improves the bending effect and quality of the hollow square pipe.

[0024] (2) Through the designed supporting component of the present invention, through the cooperation of two limiting plates and the support plate, the hollow square pipe can be limited to a preset position, which is convenient for the hollow square pipe to extend into the equipment for bending. The frictional force generated by the concave rubber on the support plate enhances the limitation of the support plate, avoiding the situation that the support plate moves after the hollow square pipe touches the support plate. The balls on the top of the support plate enable the hollow square pipe to only generate rolling friction during movement, significantly reducing the wear between the surface of the hollow square pipe and the support plate. Moreover, the hollow square pipe can be conveniently moved through the balls. The supporting component and the cleaning mechanism work together to ensure the stability of the hollow square pipe during the grinding process, enabling the vertical grinding brush and the double-sided sandpaper to more thoroughly remove the rust layer and foreign matters, improving the grinding effect, and indirectly improving the bending quality.

[0025] (3) The cleaning mechanism of the present invention is composed of a double-sided grinding sheet, a grinding column, a plate frame, a rotating column, an installation bearing, an installation motor, a threaded ring, a bottom column, a grinding motor, a collar, a worm gear, a worm ring, a convex shaft and a connecting belt. Through the rotating grinding column and double-sided grinding sheet, the front, rear, upper and lower surfaces of the hollow square pipe can be multi-dimensionally ground at the same time, and the contact surface between multiple hollow square pipes stacked in a vertical column can also be ground, extending the service life of the bending shaft and the central shaft, removing the rust layer, sediment and foreign matters, avoiding scratches or pits on the surface of the hollow square pipe caused by the embedding of impurities during bending, and significantly improving the bending quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a structural schematic diagram of the present invention;

[0027] Figure 2 Schematic diagram of the local rear view of the main body of the present invention;

[0028] Figure 3 Schematic diagram of the right view of the cleaning mechanism of the present invention;

[0029] Figure 4 Schematic diagram of the top plate and the middle frame of the present invention;

[0030] Figure 5 Schematic diagram of the vertical rod and the double-sided sandpaper of the present invention;

[0031] Figure 6 Schematic diagram of the slider frame of the present invention;

[0032] Figure 7 Schematic diagram of the limiting plate and the return plate of the present invention;

[0033] Figure 8 Schematic diagram of the upward view of the limiting plate and the return plate of the present invention;

[0034] Figure 9 Schematic diagram of the double-sided grinding sheet of the present invention;

[0035] Figure 10 Schematic diagram of the rear view of the grinding column of the present invention;

[0036] Figure 11 Schematic diagram of the upward view of the double-sided grinding sheet and the plate frame of the present invention;

[0037] Figure 12 Schematic diagram of the rotating column and the grinding column of the present invention;

[0038] Figure 13 Schematic diagram of the collar and the double-sided grinding sheet of the present invention;

[0039] Figure 14 Schematic diagram of the bottom column of the present invention;

[0040] Figure 15 Schematic diagram of the worm gear and the worm ring of the present invention;

[0041] In the figure: 100, main machine; 101, support plate; 102, bending shaft; 103, central shaft; 104, turntable; 105, retaining frame; 106, support table; 200, driving motor; 201, side plate; 203, top plate; 204, vertical grinding brush; 205, bottom plate; 206, vertical lead screw; 207, middle frame; 208, rotating rod; 209, nut seat; 210, horizontal lead screw; 211, limiting plate; 212, nut block; 213, first transmission belt; 214, slider frame; 215, double-sided sandpaper; 216, vertical rod; 218, first screw; 219, second screw; 300, concave frame; 301, limiting plate; 302, concave rubber; 303, ball; 304, support plate; 305, return plate; 306, locking stud; 400, double-sided grinding disc; 401, grinding column; 402, plate frame; 403, rotating column; 404, mounting bearing; 405, mounting motor; 406, thread ring; 407, bottom column; 408, grinding motor; 409, collar; 410, worm gear; 411, worm gear ring; 412, convex shaft; 413, connecting belt. Specific implementation mode

[0042] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. 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.

[0043] Embodiment 1

[0044] Please refer to Figures 1 - 6 , the present invention provides a technical solution: an all-electric bending machine for steel processing, a high-power negative pressure vacuum cleaner is installed around the bending machine equipment, which can suck and collect the particles, dust, etc. dropped during the grinding process. The bending shaft 102, the central shaft 103 and the turntable 104 are driven to rotate by a servo motor, including the main machine 100 and the turntable 104 rotatably arranged on the main machine 100. A servo motor is arranged inside the main machine 100, and the working end of the servo motor is fixedly provided with the bending shaft 102. The turntable 104 is sleeved and fixed outside the bending shaft 102. The bending shaft 102 rotates to bend the hollow square tube. The central shaft 103 is fixedly provided on the top of the turntable 104. The top of the main machine 100 is respectively provided with a support plate 101, a retaining frame 105 and a support table 106. The retaining frame 105 can be adjusted by moving according to the width dimension of the hollow square tube. The support table 106 can play a supporting and limiting effect when placing the hollow square tube. A cleaning mechanism is arranged on one side of the main machine 100. The cleaning mechanism includes:

[0045] Two vertical grinding brushes 204 that can reciprocate up and down and multiple double-sided sandpapers 215 that can reciprocate back and forth. The vertical grinding brushes 204 can also grind the two side surfaces of the hollow square tube. The vertical grinding brushes 204 can grind the outer surface of the hollow square tube. The double-sided sandpapers 215 can grind the contact surfaces between multiple hollow square tubes stacked vertically. It can not only grind the bent parts of multiple stacked hollow square tubes simultaneously, but also grind the contact surfaces that have not been ground between multiple stacked hollow square tubes, improving the grinding effect. The double-sided sandpapers 215 are Warrior brand sandpapers. They use high-quality alumina abrasives. The abrasive particles are uniform, with strong wear resistance, not easily broken or fractured, and are used for grinding the surface of the hollow square tube;

[0046] A top plate 203 is fixedly arranged at the top of the vertical grinding brush 204. Fixing bolts are arranged on the top plate 203. Through the fixing bolts, the vertical grinding brush 204 is fixedly connected to the top plate 203. When the vertical grinding brush 204 is worn or damaged after long-term use, the vertical grinding brush 204 can be removed for individual replacement. A vertical lead screw 206 is arranged on the top plate 203. A nut block 212 is arranged outside the vertical lead screw 206, which is used to drive the vertical grinding brush 204 to reciprocate up and down;

[0047] A horizontal lead screw 210 is rotatably arranged on one side of the main machine 100. Two nut seats 209 are arranged outside the horizontal lead screw 210. When the horizontal lead screw 210 rotates forward or reversely, it can drive the nut seats 209 to move forward or backward on the horizontal lead screw 210, so as to drive the two grinding columns 401 to rotate to grind the surface of the hollow square tube and drive the two vertical grinding brushes 204 to reciprocate up and down to grind the surface of the hollow square tube. The vertical grinding brushes 204 are wire brushes, which are used to drive the double-sided sandpapers 215 to reciprocate back and forth;

[0048] A side plate 201 is also fixedly arranged on one side of the main machine 100. When the nut seat 209 slides on the horizontal lead screw 210, the bottom of the nut seat 209 contacts the upper surface of the side plate 201. At this time, the nut seat 209 will not rotate following the rotation of the horizontal lead screw 210 when sliding. A middle frame 207 and a driving motor 200 are respectively fixedly arranged on the side plate 201. The driving motor 200 drives the horizontal lead screw 210 to rotate forward or reversely. The bottom of the vertical lead screw 206 passes through the inside of the middle frame 207, and the vertical lead screw 206 is rotatably arranged inside the middle frame 207. A rotating rod 208 is rotatably arranged on the middle frame 207. A first transmission belt 213 is sleeved between the rotating rod 208 and the horizontal lead screw 210. Through the first transmission belt 213, the horizontal lead screw 210 and the rotating rod 208 can rotate synchronously;

[0049] A limiting plate 211 is arranged inside the top plate 203. Through the limiting plate 211, when the top plate 203 moves up and down, it will slide on the limiting plate 211. The limiting plate 211 limits the top plate 203, increasing the stability of the top plate 203 when it moves up and down. The bottom of the limiting plate 211 is fixed to the top of one side of the main machine 100. A first bevel gear is fixedly arranged at the end of the rotating rod 208, and a second bevel gear is fixedly arranged at the bottom of the vertical lead screw 206. The first bevel gear meshes with the second bevel gear;

[0050] Both ends of the horizontal lead screw 210 respectively extend to the working end of the driving motor 200 and the inside of the middle frame 207, and the horizontal lead screw 210 is rotatably connected to the middle frame 207. The top of the nut seat 209 is fixedly provided with a bottom plate 205, and two vertical rods 216 are fixedly arranged on the top of the bottom plate 205;

[0051] A slider frame 214 is slidably arranged on the vertical rod 216. Both ends of the double-sided sandpaper 215 extend to the inside of the slider frame 214. A second screw rod 219 is threadedly connected inside the slider frame 214. After the second screw rod 219 is loosened upward, its working end no longer contacts the double-sided sandpaper 215, and then the severely worn double-sided sandpaper 215 can be removed and replaced. And the bottom working end of the second screw rod 219 extends to the surface of the double-sided sandpaper 215;

[0052] A first screw rod 218 is also threadedly connected inside the slider frame 214. After the first screw rod 218 is rotated and loosened outward, the working end of the first screw rod 218 no longer contacts the vertical rod 216, and then the slider frame 214 can be moved up and down to adjust the height position to adapt to hollow square tubes of different thicknesses for grinding. The working end of the first screw rod 218 extends to the surface of the vertical rod 216.

[0053] Through the designed cleaning mechanism of the present invention, before bending, the vertical grinding brush 204 can efficiently remove the rust layer, sediment and foreign matters on the outer surface of the hollow square tube through reciprocating up and down movement, avoiding scratches and pits caused by foreign matters being embedded during bending. The reciprocating back and forth movement of the double-sided sandpaper 215 can synchronously grind the contact surface between the hollow square tubes stacked in a vertical column, solving the problem that the contact surface between adjacent hollow square tubes cannot be processed only by grinding the outer surface, realizing 360° dead-angle-free cleaning of the hollow square tube, reducing the friction and wear between the bending shaft 102, the central shaft 103 and the surface of the hollow square tube, avoiding plough-shaped damage, and significantly prolonging the service life of the bending shaft 102 and the central shaft 103. The uniform removal of the rust layer ensures the accurate stress point during the bending of the pipe, reduces stress concentration and abnormal wear caused by local rust, and improves the bending effect and quality of the hollow square tube.

[0054] In summary, first, according to the dimensions of the hollow square tubes with the same batch size to be bent, turn the first screw rod 218 on the slider bracket 214 outward to loosen it, and then move the slider bracket 214 up or down to an appropriate height position. At this time, turn the first screw rod 218 towards the slider bracket 214 to tighten and fix the slider bracket 214. At this time, the distance between the two slider brackets 214 is adjusted. Subsequently, turn the second screw rod 219 on the slider bracket 214 upward to loosen it, place both ends of the double-sided sandpaper 215 on the slider bracket 214 and at the lower position of the second screw rod 219, and then turn the second screw rod 219 downward to tighten and fix the ends of the double-sided sandpaper 215. At this time, the distance between the upper and lower double-sided sandpapers 215 is equivalent to the thickness of the hollow square tube. Turn on the driving motor 200, and the working end of the driving motor 200 drives the horizontal screw rod 210 to rotate forward. The two nut seats 209 located on the horizontal screw rod 210 move forward, driving the upper bottom plate 205, two vertical rods 216, slider bracket 214, and double-sided sandpaper 215 to move forward. When the nut seat 209 moves forward to an appropriate position, the driving motor 200 reverses, driving the horizontal screw rod 210 to reverse, and then the nut seat 209 moves backward, driving the upper bottom plate 205, two vertical rods 216, slider bracket 214, and double-sided sandpaper 215 to move backward. In this way, the double-sided sandpaper 215 moves back and forth in the front and back directions;

[0055] When the horizontal screw rod 210 rotates forward, it drives the rotating rod 208 to rotate forward through the first transmission belt 213. Then, under the meshing action of the first bevel gear at the end of the rotating rod 208 and the second bevel gear at the bottom of the vertical rod 216, the vertical screw rod 206 rotates. The nut block 212 located outside the vertical screw rod 206 moves downward, driving the top plate 203 to move. The top plate 203 drives the two vertical grinding brushes 204 below to move downward. Then, when the horizontal screw rod 210 reverses, it drives the rotating rod 208 and the vertical screw rod 206 to reverse. Then, the nut block 212 moves upward, driving the two vertical grinding brushes 204 to move upward. In this way, the vertical grinding brushes 204 can move up and down reciprocally;

[0056] When one end of the hollow square tube extends from the double-sided sandpaper 215 to an appropriate position at the top of the turntable 104 and is between the central axis 103 and the bending axis 102, then stack multiple hollow square tubes into a vertical column according to the same steps as above. In this way, multiple hollow square tubes can be bent at one time, increasing the bending efficiency. During the extension process, the vertical grinding brush 204 that moves up and down reciprocally can grind the outer surface of the hollow square tube, and the double-sided sandpaper 215 that moves back and forth can grind the contact surfaces between two adjacent hollow square tubes stacked in a column, so as to grind the positions that cannot be reached by the vertical grinding brush 204 between two adjacent hollow square tubes, realizing the dead-angle-free grinding of the outer surface of the hollow square tube, and removing the rust layer, sediment, and foreign matter on the outer surface of the hollow square tube.

[0057] Embodiment 2

[0058] On the basis of Embodiment 1, please refer to Figure 1 、 Figure 2 、 Figure 7 and Figure 8 On one side of the top of the main machine 100, there is a support assembly for supporting the hollow square tube. The support assembly includes a concave frame 300 fixed on the top of one side of the main machine 100 and two limiting plates 301 arranged above the concave frame 300. Place the hollow square tube between the two limiting plates 301 and at the top position of the support plate 304. The two limiting plates 301 can limit the hollow square tube placed in the bending device, facilitating the bending operation when placed in the device;

[0059] Inside the limiting plate 301, there is a support plate 304. At the bottom of the limiting plate 301, there is a fixed loop plate 305. The loop plate 305 can slide back and forth reciprocally on the concave frame 300. The bottom of the loop plate 305 is connected with a locking stud 306 by thread. The locking stud 306 can fix the loop plate 305 that slides to an appropriate position, and then fix the upper limiting plate 301. The top working end of the locking stud 306 extends to the surface of the concave frame 300;

[0060] A groove is opened inside the limiting plate 301. The inner wall of the groove is fixed with a concave rubber 302. The friction between the concave rubber 302 and the support plate 304 can limit the support plate 304, preventing the support plate 304 from sliding back and forth when the hollow square tube touches the support plate 304 during the bending operation. The outer wall of the support plate 304 contacts the inner wall of the concave rubber 302, and multiple groups of ball bearings 303 are rotatably arranged on the top of the support plate 304.

[0061] Through the designed support assembly, the hollow square tube can be limited to a preset position through the cooperation of two limiting plates 301 and a support plate 304, facilitating the insertion of the hollow square tube into the device for bending. The frictional force generated by the concave rubber 302 on the support plate 304 enhances the limitation of the support plate 304, preventing the situation where the support plate 304 moves after the hollow square tube touches it. The balls 303 on the top of the support plate 304 enable the hollow square tube to only generate rolling friction during movement, significantly reducing the wear between the surface of the hollow square tube and the support plate 304. Moreover, the balls 303 can also facilitate the movement of the hollow square tube. Through the adjustable design of the return plate 305 and the locking stud 306, the distance between the limiting plates 301 can be adjusted according to the width of the hollow square tube. The support assembly and the cleaning mechanism work together to ensure the stability of the hollow square tube during the grinding process, enabling the vertical grinding brush 204 and the double-sided sandpaper 215 to more thoroughly remove the rust layer and foreign objects, improving the grinding effect and indirectly enhancing the bending quality.

[0062] In summary, before multiple hollow square tubes are inserted into the device, according to the width of the batch of hollow square tubes with the same size to be bent, adjust the distance between the two limiting plates 301. When adjusting, turn the locking stud 306 at the bottom of the return plate 305 downward to loosen it, and then move the two limiting plates 301 back and forth to adjust the distance. When the limiting plates 301 move, they will drive the return plate 305 at the bottom to slide on the concave frame 300. When the adjustment is completed, turn the locking stud 306 upward to tighten and fix the return plate 305, that is, fix the limiting plates 301. Then slide the support plate 304 on the limiting plates 301 to the central position between the two limiting plates 301. At this time, when inserting the hollow square tube, place the end of the hollow square tube on the multiple groups of balls 303 in the support plate 304 and then insert it into the device. At this time, the two limiting plates 301 can limit the moving hollow square tube, preventing deviation. Moreover, the balls 303 can facilitate the movement of the hollow square tube, making the movement of the hollow square tube more labor-saving and reducing the degree of frictional wear on the hollow square tube. When the hollow square tube after grinding and cleaning enters the turntable 104 for bending, it can reduce the influence of the rust layer, sediment, and foreign objects attached to the hollow square tube on the hollow square tube.

[0063] Embodiment III

[0064] Based on Embodiment II, please refer to Figure 1 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 and Figure 15, the cleaning mechanism includes two rotatably arranged rotating columns 403 and grinding columns 401. When the grinding column 401 rotates, it will grind the front and back surfaces of the hollow square tube, and then the upper and lower surfaces of the hollow square tube are ground by the rotating double-sided grinding sheet 400. A plurality of collars 409 are sleeved outside the rotating column 403, and the double-sided grinding sheet 400 is fixedly arranged outside the collar 409. The double-sided grinding sheet 400 can be a thin grinding blade or a thin grinding wheel sheet, etc. A bottom column 407 is fixedly arranged at the bottom of the grinding column 401;

[0065] A first bolt is arranged on the collar 409. Through the first bolt, the collar 409 can be fixed to the rotating column 403. By loosening the first bolt, the height of the double-sided grinding sheet 400 can be adjusted according to the thickness of the hollow square tube, so that the distance between the double-sided grinding sheets 400 can adapt to hollow square tubes of different thicknesses. And the working end of the first bolt extends to the surface of the rotating column 403. A connecting belt 413 is sleeved between the bottoms of the two rotating columns 403. Through the connecting belt 413, the two rotating columns 403 can rotate synchronously. A plate frame 402 is fixedly arranged at the top on one side of the main machine 100, and an installation motor 405 is fixedly arranged at the bottom of the plate frame 402. The bottom of the rotating column 403 at the front position of the hollow square tube is fixedly connected to the working end of the installation motor 405, and the working end of the installation motor 405 extends to the bottom of the rotating column 403;

[0066] A worm gear 410 is sleeved outside the bottom column 407, and a worm gear ring 411 is meshed outside the worm gear 410;

[0067] At the top of the plate frame 402, a grinding motor 408, a vertical plate, and a convex shaft 412 are respectively provided. One end of the convex shaft 412 is fixedly connected to the working end of the grinding motor 408, and the other end of the convex shaft 412 is rotatably connected to the vertical plate. Both the grinding motor 408 and the vertical plate are fixed on the plate frame 402. The worm ring 411 is sleeved outside the convex shaft 412. The grinding motor 408 can drive the convex shaft 412 to rotate, thereby driving the two worm rings 411 outside it to rotate. The spiral directions of the outsides of the two worm rings 411 and the outsides of the two worm wheels 410 are opposite. Therefore, when a set of worm rings 411 drives the worm wheel 410 and the bottom column 407 to rotate, the other set of worm rings 411 drives the worm wheel 410 and the bottom column 407 to rotate in the other direction. Their rotation directions are opposite. At this time, the grinding column 401 near the front rotates counterclockwise, and the grinding column 401 near the back rotates clockwise, which is convenient for moving the hollow square tube to the left side of the equipment while grinding. A second bolt is provided on one side of the worm ring 411. When adjusting the distance between the two grinding columns 401 according to the width of the hollow square tube with different thicknesses, the second bolt can also be loosened, and then the corresponding worm ring 411 is moved forward or backward on the convex shaft 412, and then tightened by the second bolt to fix the worm ring 411 on the convex shaft 412, and the working end of the second bolt extends to the surface of the convex shaft 412;

[0068] An installation bearing 404 is sleeved outside the bottom column 407. The installation bearing 404 facilitates the rotation of the bottom column 407. Two thread rings 406 are threadedly connected to the outside of the installation bearing 404. Moreover, a thread groove is provided on the outer wall of the installation bearing 404, and then the thread groove is threadedly connected to the thread ring 406. By loosening both thread rings 406, when adjusting the distance between the two grinding columns 401, the bottom column 407 at the bottom of the grinding column 401 can be moved forward or backward on the plate frame 402, driving the installation bearing 404 to move to a suitable position, and finally rotating both thread rings 406 in the opposite direction and tightening them to adjust the distance between the two grinding columns 401.

[0069] The cleaning mechanism of the present invention is composed of a double-sided grinding piece 400, a grinding column 401, a plate frame 402, a rotating column 403, an installation bearing 404, an installation motor 405, a thread ring 406, a bottom column 407, a grinding motor 408, a collar 409, a worm wheel 410, a worm ring 411, a convex shaft 412, and a connecting belt 413. Through the rotating grinding column 401 and the double-sided grinding piece 400, the front, back, upper, and lower surfaces of the hollow square tube can be multi-dimensionally ground simultaneously, and the contact surfaces between multiple hollow square tubes stacked in a vertical column can also be ground, extending the service life of the bending shaft 102 and the central shaft 103, removing rust layers, sediment, and foreign objects, and avoiding scratches or pits caused by impurities embedding on the surface of the hollow square tube during bending, significantly improving the bending quality.

[0070] In summary, before bending, first adjust the distance between the double-sided grinding discs 400 according to the thickness of the hollow square tube. When adjusting, unscrew the first bolt on the collar 409, and then move the collar 409 and the external double-sided grinding discs 400 up or down to a suitable height position. Similarly, adjust the others as described above. After adjustment, adjust the distance between the two grinding columns 401 according to the width dimension of the hollow square tube. When adjusting, turn the two threaded rings 406 on the bottom column 407 in opposite directions to loosen them. At the same time, turn the second bolts on the two worm rings 411 on the convex shaft 412 upward to loosen them. Then move the bottom column 407 and the corresponding worm rings 411 forward or backward. Then the bottom column 407 slides on the plate frame 402 and the worm rings 411 slide on the convex shaft 412. When the bottom column 407 moves, it drives the upper grinding column 401 to move accordingly. Then, after moving to the appropriate position, turn the two threaded rings 406 on the bottom column 407 in opposite directions to tighten them to fix the bottom column 407, and then the distance between the two grinding columns 401 can be adjusted. Then tighten the second bolts on the worm rings 411 to fix the worm rings 411 on the convex shaft 412;

[0071] Then start the grinding motor 408 to drive the convex shaft 412 to rotate. The convex shaft 412 drives the two worm rings 411 to rotate, driving the worm gears 410, the bottom column 407 and the grinding columns 401 to rotate. At the same time, open the locking stud 306 to drive the rotating column 403 to rotate. The rotating column 403 drives another rotating column 403 to rotate through the connecting belt 413. When the rotating column 403 rotates, it drives the external double-sided grinding discs 400 to rotate. Then pass multiple hollow square tubes through the space between the two grinding columns 401 and between the double-sided grinding discs 400 on the support plate 304 in sequence and extend them onto the turntable 104 in the bending device. At this time, multiple groups of hollow square tubes are stacked vertically. During the extension process, the front and back surfaces of the hollow square tubes are ground by the grinding columns 401, and then the top and bottom surfaces of the hollow square tubes are ground by the rotating double-sided grinding discs 400, so as to realize the grinding and cleaning of the outer surface of the hollow square tube, and remove the rust layer, sediment and foreign matters on the outer surface of the hollow square tube.

[0072] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A pure electric bending machine for steel processing, comprising a main machine (100) and a turntable (104) rotatably arranged on the main machine (100), wherein a cleaning mechanism is arranged on one side of the main machine (100), and it is characterized in that, The cleaning mechanism includes: Two vertically reciprocating vertical grinding brushes (204) and multiple reciprocating double-sided sandpapers (215) for grinding the surface of the hollow square tube. A top plate (203) is fixedly arranged at the top of the vertical grinding brush (204). A vertical lead screw (206) is arranged on the top plate (203), and a nut block (212) is arranged outside the vertical lead screw (206) for driving the vertical grinding brush (204) to reciprocate up and down. A horizontal lead screw (210) is rotatably arranged on one side of the main machine (100), and two nut seats (209) are arranged outside the horizontal lead screw (210) for driving the double-sided sandpaper (215) to reciprocate back and forth.

2. The pure electric bending machine for steel processing according to claim 1, wherein: A side plate (201) is also fixedly arranged on one side of the main machine (100). A middle frame (207) and a driving motor (200) are respectively fixedly arranged on the side plate (201). A rotating rod (208) is rotatably arranged on the middle frame (207), and a first transmission belt (213) is sleeved between the rotating rod (208) and the horizontal lead screw (210).

3. The pure electric bending machine for steel processing according to claim 2, characterized in that: A limiting plate (211) is arranged inside the top plate (203). A first bevel gear is fixedly arranged at the end of the rotating rod (208), and a second bevel gear is fixedly arranged at the bottom of the vertical lead screw (206).

4. The pure electric bending machine for steel processing according to claim 1, wherein: A bottom plate (205) is fixedly arranged at the top of the nut seat (209), and two vertical rods (216) are fixedly arranged at the top of the bottom plate (205). A slider frame (214) is slidably arranged on the vertical rod (216). A second screw rod (219) is connected inside the slider frame (214) by threads, and a first screw rod (218) is also connected inside the slider frame (214) by threads.

5. The pure electric bending machine for steel processing according to claim 2, wherein: A support assembly for supporting the hollow square tube is arranged at the top of one side of the main machine (100). The support assembly includes a concave frame (300) fixedly arranged at the top of one side of the side plate (201) and two limiting plates (301) arranged above the concave frame (300). A support plate (304) is arranged inside the limiting plate (301). A return plate (305) is fixedly arranged at the bottom of the limiting plate (301), and a locking stud (306) is connected to the bottom of the return plate (305) by threads.

6. The pure electric bending machine for steel processing according to claim 5, characterized in that: A groove is formed inside the limiting plate (301), a concave rubber (302) is fixedly arranged on the inner wall of the groove, and multiple groups of ball bearings (303) are rotatably arranged on the top of the support plate (304).

7. A pure electric bending machine for steel processing according to claim 1, characterized in that: The cleaning mechanism includes two rotatably arranged rotating columns (403) and a grinding column (401). Multiple collars (409) are sleeved outside the rotating column (403), double-sided grinding sheets (400) are fixedly arranged outside the collars (409), and a bottom column (407) is fixedly arranged at the bottom of the grinding column (401).

8. The pure electric bending machine for steel processing according to claim 7, wherein: A connecting belt (413) is sleeved between the bottoms of the two rotating columns (403). A plate frame 4(02) is fixedly arranged at the top of one side of the main machine (100), and a mounting motor 4(05) is fixedly arranged at the bottom of the plate frame (402).

9. The pure electric bending machine for steel processing according to claim 8, characterized in that: A worm gear (410) is sleeved outside the bottom column (407), and a worm gear ring (411) is meshed outside the worm gear (410); A grinding motor (408), a vertical plate and a convex shaft (412) are respectively arranged at the top of the plate frame (402); An installation bearing (404) is sleeved outside the bottom column (407), and two thread rings (406) are connected to the outside of the installation bearing (404) by threads.

10. The pure electric bending machine for steel processing according to claim 1, characterized in that: A servo motor is arranged inside the main machine (100), a bending shaft (102) is fixedly arranged at the working end of the servo motor, and a central shaft (103) is fixedly arranged at the top of the turntable (104).

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