A full-automatic edge rolling and welding production line for electric vehicle wheel hub

Abstract

The application provides a kind of full-automatic coiling welding production line of electric vehicle wheel hub, containing two parallelly arranged material loading and leveling machines, two parallelly arranged cutting coiling welding machines, robots, joint sealers;Cutting coiling welding machine contains first conveying mechanism, cutting and printing mechanism, second conveying mechanism, preliminary coiling mechanism, pushing mechanism, coiling positioning mechanism, clamping pulling mechanism, laser welding mechanism;Joint sealer contains base, joint sealer mechanism, pressing mechanism, pushing mechanism, can realize the automatic operation of material loading, cutting, printing, coiling, positioning, welding, joint sealing, discharging, effectively improve production efficiency, can reduce manpower investment, reduce production cost, ensure product quality stability.

Description

Technical Field

[0001] This invention relates to the field of wheel hub processing equipment technology, and more particularly to a fully automatic rolling and welding production line for electric vehicle wheel hubs. Background Technology

[0002] A wheel hub is a circular metal component that supports the tire. Electric vehicle wheel hubs are primarily made by cutting steel strips, rolling them into a circle, and then welding the two ends together. Currently, the processes of cutting, rolling, welding, and seaming electric vehicle wheel hubs require multiple workers using multiple machines with separate functions. This results in a high workload, significant manpower investment, low production efficiency, high production costs, and inconsistent product quality. Summary of the Invention

[0003] The problem to be solved by this invention is to provide a fully automated rolling and welding production line for electric vehicle wheel hubs, which reduces manpower input and improves production efficiency.

[0004] To solve the above-mentioned technical problems, the present invention provides a fully automatic rolling and welding production line for electric vehicle wheel hubs, comprising two parallel feeding and leveling machines, two parallel cutting, rolling, and welding machines, a robot, and a seam pressing machine; the cutting, rolling, and welding machine comprises a first conveying mechanism, a cutting and marking mechanism, a second conveying mechanism, a preliminary rolling mechanism, a pushing mechanism, a rolling and positioning mechanism, a clamping and pulling mechanism, and a laser welding mechanism. The first conveying mechanism is used to convey the steel strip to the cutting and marking mechanism, and the cutting and marking mechanism is used to... The steel sheets are cut to a specified length. A second conveying mechanism feeds the steel sheets onto a preliminary rolling mechanism, which initially rolls them into an arc shape. A pushing mechanism pushes the arc-shaped steel sheets onto a rolling positioning mechanism, which rolls them into a circle and shapes them. A clamping and pulling-out mechanism clamps and positions the shaped circular steel sheet at both ends and pulls it out of the rolling positioning mechanism. A laser welding mechanism welds the ends of the circular steel sheet clamped on the clamping and pulling-out mechanism together. (Feeding) The leveling machine is used to level the steel strip of the steel strip coil and convey it to the first conveying mechanism; the seaming machine includes a base, a seaming mechanism, a pressing mechanism, and an ejection mechanism. The seaming mechanism includes a frame mounted on top of the base, an upper rolling mechanism, a lower rolling mechanism, and a sliding hydraulic cylinder. The upper rolling mechanism includes an upper slide plate slidably connected to the frame along the X-axis, a seaming hydraulic cylinder mounted on top of the upper slide plate, a roller seat driven and connected to the seaming hydraulic cylinder, and an upper roller rotatably connected to the roller seat. The lower rolling mechanism includes an X-axis sliding mechanism mounted on top of the base. An axial slide rail, a lower slide plate slidably connected to the X-axis slide rail and fixedly connected to the upper slide plate, and a lower roller rotatably connected to the lower slide plate are included. A sliding hydraulic cylinder is located on one side of the frame to drive the upper and lower slide plates to move along the X-axis. A clamping mechanism is used to clamp both ends of the wheel hub to the top of the X-axis slide rail. An ejection mechanism is used to eject the wheel hub from the X-axis slide rail. A robot is used to pick up and place the welded wheel hub from the clamping and pulling mechanism onto the X-axis slide rail and remove the seam-pressed wheel hub from the X-axis slide rail to the next work station.

[0005] Preferably, the pushing mechanism includes a first support, a first transverse support column fixedly connected to one side of the first support, and a pushing assembly. The pushing assembly includes two first pushing cylinders symmetrically arranged on the first support and a first pushing plate. The first pushing cylinders are drivenly connected to the first pushing plate. The top of the first pushing plate is provided with a first arc-shaped clearance groove, and the first transverse support column is disposed on the first arc-shaped clearance groove. The rolling positioning mechanism includes a ring positioning mechanism and an end clamping mechanism. The ring positioning mechanism includes a second support, two first positioning components, and two second positioning components. The second support includes two parallel upright plates. The top of the upright plates is provided with a second arc-shaped clearance groove. The two first positioning components are symmetrically arranged on both sides of the second support. The first positioning component includes a first positioning cylinder fixedly connected between the two upright plates and a first C-shaped support member drivenly connected to the first positioning cylinder. Two second positioning components are symmetrically arranged on both sides of the second support. The second positioning component includes a second positioning cylinder fixedly connected between the two upright plates and a second C-shaped support member driven by the second positioning cylinder. Several first rollers are rotatably connected to the front end of the second C-shaped support member. The end pressing mechanism includes a second transverse support column assembled at one end of the first transverse support column, a lifting cylinder, a pressure plate, and a pressing component located at the bottom of the second transverse support column. The pressure plate includes a pressing part and a limiting part connected in a "T" shape. A strip-shaped receiving groove matching the limiting part is provided at the top of the second transverse support column. The limiting part is movably disposed on the strip-shaped receiving groove. A through hole communicating with the strip-shaped receiving groove is provided through the second transverse support column. A top rod driven by the lifting cylinder is movably disposed on the through hole. The pressing component includes a pressing cylinder and a pressing block driven by the pressing cylinder.

[0006] Preferably, the clamping and pulling-out mechanism includes a Y-axis linear drive mechanism, a third support driven and connected to the Y-axis linear drive mechanism, a first clamping assembly, and a second clamping assembly. Both the first and second clamping assemblies include a lower clamping arm, a connecting rod hinged to the top of the lower clamping arm, an upper clamping arm hinged to one end of the connecting rod, and a clamping cylinder. The other end of the connecting rod is hinged to the output shaft of the clamping cylinder. The lower clamping arm and clamping cylinder of the first clamping assembly are fixedly connected to the top of the third support. An X-axis slide block is slidably connected to the top of the third support along the X-axis direction. An X-axis drive cylinder, driven and connected to the X-axis slide block, is provided on the top of the third support. The lower clamping arm and clamping cylinder of the second clamping assembly are fixedly connected to the top of the X-axis slide block. The top of the second transverse support column is provided with a first receiving groove and a second receiving groove located on both sides of the strip-shaped receiving groove. The lower clamping arms of the first and second clamping assemblies are respectively corresponding to the first and second receiving grooves.

[0007] Preferably, the second conveying mechanism includes an outer cover and a conveying mechanism disposed inside the outer cover. The outer cover includes two first side plates arranged side by side and a base plate fixedly connected between the bottoms of the two first side plates. The preliminary rolling mechanism includes a first bending mechanism and a second bending mechanism. The first bending mechanism includes a first bending cylinder fixedly connected between one end of the two first side plates and a third C-shaped support member driven by the first bending cylinder. The front end of the third C-shaped support member is rotatably connected with a plurality of second rollers arranged side by side. The second bending mechanism includes a second bending cylinder disposed on the base plate and a push plate driven by the second bending cylinder.

[0008] Preferably, the laser welding mechanism includes a support, an X-axis linear drive mechanism disposed on the support, a Z-axis linear drive mechanism driven and connected to the X-axis linear drive mechanism, and a laser welding module driven and connected to the Z-axis linear drive mechanism.

[0009] Preferably, the frame includes two second side plates arranged side by side on the top of the base, a back plate fixedly connected between one end of the two second side plates, and a top plate fixedly connected between the top of the two second side plates and the back plate. An X-axis movable groove is provided through the top plate. A transverse connecting plate is fixedly connected to the top of the lower slide plate. A longitudinal connecting plate is fixedly connected between the transverse connecting plate and the upper slide plate. The longitudinal connecting plate is movably arranged on the X-axis movable groove. A sliding hydraulic cylinder is arranged on the back plate and its output shaft is fixedly connected to the longitudinal connecting plate.

[0010] Preferably, the clamping mechanism includes a gantry frame disposed on the top of the top plate, two symmetrically arranged clamping components, each clamping component including a clamping drive cylinder hinged to one side of the gantry frame, two connecting arms fixedly connected in parallel to the second side plate, and a clamping arm hinged between the two connecting arms, with the output shaft of the clamping drive cylinder hinged to one end of the clamping arm.

[0011] Preferably, the ejection mechanism includes two symmetrically arranged second pusher cylinders and a second pusher plate. The second pusher cylinders are disposed on the inner side wall of the second side plate. The output shafts of the two second pusher cylinders are respectively fixedly connected to one end of the second pusher plate. The second pusher plate is provided with a clearance groove that matches the X-axis slide rail. The X-axis slide rail is disposed in the clearance groove.

[0012] Preferably, it also includes two side-by-side chillers for cooling the leveled steel strip.

[0013] The beneficial effects of this invention are as follows: This invention provides a fully automatic rolling and welding production line for electric vehicle wheel hubs. Steel strip is coiled onto a feeding and leveling machine. After leveling, the steel strip is conveyed to a first conveying mechanism. Driven by the first conveying mechanism, the steel strip is cut into steel sheets of a specified length by a cutting and printing mechanism, and the steel sheets are printed. Driven by a second conveying mechanism, the steel sheets are rolled into an arc shape by a preliminary rolling mechanism. A pushing mechanism pushes the arc-shaped steel sheet onto a rolling and positioning mechanism. The rolling and positioning mechanism rolls the arc-shaped steel sheet into a circle and shapes it. A clamping and pulling-out mechanism clamps and positions the shaped circular steel sheet at both ends and pulls it out from the rolling and positioning mechanism. A laser welding mechanism then performs a welding operation on the clamped and pulled-out steel sheet. The two ends of the circular steel sheet on the output mechanism are welded together. The robot picks up the welded hub from the clamping and pulling mechanism and places it onto the X-axis slide rail. The weld seam of the hub will be located between the upper roller and the lower roller. The upper roller is driven to descend by the pressing hydraulic cylinder so that the upper roller and the lower roller press the weld seam. Then, the upper roller and the lower roller are driven to move forward synchronously by the sliding hydraulic cylinder, and the weld seam of the hub will be flattened. After the upper roller and the lower roller are reset, the robot can take the pressed hub out of the X-axis slide rail and move it to the next station. This realizes the automation of feeding, cutting, printing, rolling, positioning, welding, pressing, and output, which effectively improves production efficiency, reduces labor input, lowers production costs, and ensures stable product quality. Attached Figure Description

[0014] Figure 1 A schematic diagram illustrating the external structure of the present invention is shown.

[0015] Figure 2 A schematic diagram illustrating the external structure of the cutting, rolling, and welding machine of the present invention is shown.

[0016] Figure 3 A cross-sectional view of the cutting and rolling welding machine of the present invention in a first direction is shown.

[0017] Figure 4 A cross-sectional view of the cutting and rolling welding machine of the present invention in a second direction is shown.

[0018] Figure 5 The present invention is illustrated. Figure 4 A magnified schematic diagram of part A in the middle.

[0019] Figure 6 A schematic diagram illustrating the structure of the feeding mechanism of the present invention is shown.

[0020] Figure 7 A schematic diagram illustrating the structure of the rolling positioning mechanism of the present invention is shown.

[0021] Figure 8 A schematic diagram illustrating the structure of the clamping and pulling-out mechanism of the present invention is shown.

[0022] Figure 9 A schematic diagram illustrating the structure of the seam sealing machine of the present invention is shown.

[0023] Figure 10 A schematic diagram illustrating the structure of the seam pressing mechanism of the present invention is shown.

[0024] Reference numerals: 1. Feeding and leveling machine; 2. Cutting, rolling, and welding machine; 20. First conveying mechanism; 21. Cutting and printing mechanism; 22. Second conveying mechanism; 220. Outer cover; 220a. First side plate; 220b. Base plate; 221. Conveying mechanism; 23. Preliminary rolling mechanism; 230. First bending mechanism; 230a. Third C-shaped support; 230b. Second roller; 230c. Second bending mechanism; 231a. Second bending cylinder; 231a. Push plate; 231b. Pushing mechanism; 24. First support; 240. First transverse support column; 241. First pushing cylinder; 242. First pushing plate. 43. Rolling positioning mechanism 25, second support 250, upright plate 250a, second arc-shaped clearance groove 250b, first positioning component 251, first positioning cylinder 251a, first C-shaped support 251b, second positioning component 252, second positioning cylinder 252a, second C-shaped support 252b, first roller 252c, second transverse support column 253, strip-shaped receiving groove 253a, first receiving groove 253b, second receiving groove 253c, lifting cylinder 254, pressure plate 255, pressing part 255a, limiting part 255b, top rod 256, pressing cylinder 257, pressure block 2 57a. Clamping and pulling-out mechanism 26, Y-axis linear drive mechanism 260, third support 261, first clamping assembly 262, lower clamping arm 262a, connecting rod 262b, upper clamping arm 262c, clamping cylinder 262d, second clamping assembly 263, X-axis slide 264, X-axis drive cylinder 264a, laser welding mechanism 27, bracket 270, X-axis linear drive mechanism 271, Z-axis linear drive mechanism 272, laser welding module 273, robot 3, seam presser 4, base 40, seam presser mechanism 41, frame 410, second side plate 410a, back plate 410b Top plate 410c, X-axis movable groove 410d, upper rolling mechanism 411, upper sliding plate 411a, pressing hydraulic cylinder 411b, roller seat 411c, upper roller 411d, lower rolling mechanism 412, X-axis slide rail 412a, lower sliding plate 412b, lower roller 412c, transverse connecting plate 412d, longitudinal connecting plate 412e, sliding hydraulic cylinder 413, pressing mechanism 42, gantry frame 420, pressing drive cylinder 421, connecting arm 422, pressing arm 423, ejection mechanism 43, second pushing cylinder 430, second pushing plate 431, clearance groove 431a, chiller 5. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure.

[0026] Based on the embodiments described in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0027] refer to Figure 1-10 .

[0028] This invention provides a fully automated rolling and welding production line for electric vehicle wheel hubs, comprising two parallel feeding and leveling machines 1, two parallel cutting, rolling, and welding machines 2, a robot 3, and a seam pressing machine 4. The cutting, rolling, and welding machine 2 includes a first conveying mechanism 20, a cutting and marking mechanism 21, a second conveying mechanism 22, a preliminary rolling mechanism 23, a pushing mechanism 24, a rolling and positioning mechanism 25, a clamping and pulling mechanism 26, and a laser welding mechanism 27. The first conveying mechanism 20 conveys the steel strip onto the cutting and marking mechanism 21, which cuts the steel strip into steel sheets of a specified length. The second conveying mechanism 22 conveys the steel sheets onto... The steel sheet is initially rolled into an arc shape by a preliminary rolling mechanism 23. A pushing mechanism 24 pushes the arc-shaped steel sheet onto a rolling positioning mechanism 25, which rolls the arc-shaped steel sheet into a circle and shapes it. A clamping and pulling mechanism 26 clamps and positions the shaped circular steel sheet at both ends and pulls it out from the rolling positioning mechanism 25. A laser welding mechanism 27 welds the two ends of the circular steel sheet clamped on the clamping and pulling mechanism 26 together. A feeding and leveling machine 1 levels the steel strip from the coil and conveys it to the first conveying mechanism 20. A seaming machine 4 includes a base 40 and a seaming mechanism 41. The pressing mechanism 42 and the pushing mechanism 43 are included. The pressing mechanism 41 includes a frame 410 disposed on the top of the base 40, an upper rolling mechanism 411, a lower rolling mechanism 412, and a sliding hydraulic cylinder 413. The upper rolling mechanism 411 includes an upper slide plate 411a slidably connected to the frame 410 along the X-axis direction, a pressing hydraulic cylinder 411b disposed on the top of the upper slide plate 411a, a roller seat 411c drivenly connected to the pressing hydraulic cylinder 411b, and an upper roller 411d rotatably connected to the roller seat 411c. The lower rolling mechanism 412 includes an X-axis slide rail 412a disposed on the top of the base 40, and a sliding hydraulic cylinder 413 slidably connected to the X-axis slide rail 412a. The upper slide plate 412b is fixedly connected to the upper slide plate 411a, and the lower roller 412c is rotatably connected to the lower slide plate 412b. The sliding hydraulic cylinder 413 is set on one side of the frame 410 to drive the upper slide plate 411a and the lower slide plate 412b to move along the X-axis. The clamping mechanism 42 is used to clamp the two ends of the wheel hub to the top of the X-axis slide rail 412a. The ejection mechanism 43 is used to eject the wheel hub from the X-axis slide rail 412a. The robot 3 is used to pick up the welded wheel hub from the clamping and pulling mechanism 26 and place it on the X-axis slide rail 412a, and take the pressed wheel hub out of the X-axis slide rail 412a to the next station.

[0029] Its working principle is as follows: The steel strip is loaded onto the feeding and leveling machine 1. After leveling, the steel strip is conveyed to the first conveying mechanism 20. Driven by the first conveying mechanism 20, the steel strip is cut into steel sheets of a specified length by the cutting and printing mechanism 21, and the steel sheets are printed. Driven by the second conveying mechanism 22, the steel sheets are rolled into an arc shape by the preliminary rolling mechanism 23. The pushing mechanism 24 pushes the arc-shaped steel sheet onto the rolling and positioning mechanism 25. The rolling and positioning mechanism 25 rolls the arc-shaped steel sheet into a circle and shapes it. The clamping and pulling mechanism 26 clamps and positions the shaped circular steel sheet at both ends and pulls it out from the rolling and positioning mechanism 25. The laser welding mechanism 27 welds the two ends of the circular steel sheet clamped on the clamping and pulling mechanism 26 together. The robot 3 then welds the welded steel sheet together. The hub is picked up from the clamping and pulling mechanism 26 and placed onto the X-axis slide rail 412a. The weld seam of the hub will be located between the upper roller 411d and the lower roller 412c. The upper roller 411d is driven to descend by the pressing hydraulic cylinder 411b so that the upper roller 411d and the lower roller 412c press the weld seam. Then, the upper roller 411d and the lower roller 412c are driven to move forward synchronously by the sliding hydraulic cylinder 413, and the weld seam of the hub will be flattened. After the upper roller 411d and the lower roller 412c are reset, the robot 3 can take the pressed hub out from the X-axis slide rail 412a to the next station. This realizes the automation of feeding, cutting, printing, rolling, positioning, welding, pressing, and unloading, which effectively improves production efficiency, reduces manpower input, lowers production costs, and ensures stable product quality.

[0030] Based on the above embodiments, the pushing mechanism 24 includes a first support 240, a first transverse support column 241 fixedly connected to one side of the first support 240, and a pushing assembly. The pushing assembly includes two first pushing cylinders 242 symmetrically arranged on the first support 240 and a first pushing plate 243. The first pushing cylinders 242 are drivenly connected to the first pushing plate 243. The top of the first pushing plate 243 is provided with a first arc-shaped clearance groove, and the first transverse support column 241 is disposed on the first arc-shaped clearance groove. The rolling positioning mechanism 25 includes a ring positioning mechanism and an end clamping machine. The circular positioning mechanism includes a second support 250, two first positioning components 251, and two second positioning components 252. The second support 250 includes two parallel upright plates 250a, with a second arc-shaped clearance groove 250b on the top of each upright plate 250a. The two first positioning components 251 are symmetrically arranged on both sides of the second support 250. Each first positioning component 251 includes a first positioning cylinder 251a fixedly connected between the two upright plates 250a and a first C-shaped support member 251b drivenly connected to the first positioning cylinder 251a. The two second positioning components 252... Components 252 are symmetrically arranged on both sides of the second support 250. The second positioning component 252 includes a second positioning cylinder 252a fixedly connected between the two upright plates 250a, and a second C-shaped support member 252b drivenly connected to the second positioning cylinder 252a. Several first rollers 252c are rotatably connected side by side to the front end of the second C-shaped support member 252b. The end clamping mechanism includes a second transverse support column 253 assembled at one end of the first transverse support column 241, a lifting cylinder 254 disposed at the bottom of the second transverse support column 253, a pressure plate 255, and a clamping assembly. The component includes a pressure plate 255 comprising a pressing part 255a and a limiting part 255b connected in a "T" shape. A strip-shaped receiving groove 253a matching the limiting part 255b is provided at the top of the second transverse support column 253. The limiting part 255b is movably disposed on the strip-shaped receiving groove 253a. A through hole communicating with the strip-shaped receiving groove 253a is provided through the second transverse support column 253. A push rod 256, driven and connected to the lifting cylinder 254, is movably disposed on the through hole. The pressing assembly includes a pressing cylinder 257 and a pressing block 257a driven and connected to the pressing cylinder 257. Specifically, after the steel sheet is rolled into an arc shape by the preliminary rolling mechanism 23, the first pushing plate 243 is moved forward by the first pushing cylinder 242, and the arc-shaped steel sheet is pushed onto the second transverse support column 253 by the first pushing plate 243.At this point, the arc-shaped steel sheet will be positioned between the first positioning components 251 and the second positioning components 252. The first positioning cylinder 251a drives the first C-shaped support member 251b forward, causing the first C-shaped support members 251b of the two first positioning components 251 to press and position the two lower positions of the steel sheet. The second positioning cylinder 252a drives the second C-shaped support member 252b forward, causing the first rollers 252c of the second C-shaped support members 252b on the two second positioning components 252 to press and position the two upper positions of the steel sheet. The steel sheet is shaped into the desired form, and both ends of the steel sheet abut against the two sides of the limiting part 255b. The gaps at both ends of the steel sheet are located at the top center. The steel sheet is then moved downwards into the strip-shaped receiving groove 253a by the clamping cylinder 257. The clamping block 257a will press against the pressure plate 255, so that the clamping part 255a will press and position the two ends of the steel sheet. When the clamping and pulling mechanism 26 needs to pull the steel sheet out from the rolling and positioning mechanism 25 for welding, the clamping cylinder 257 drives the clamping block 257a to rise and reset. Then, the lifting cylinder 254 drives the lifting rod 256 to rise, so that the lifting rod 256 lifts the pressure plate 255. At this time, the clamping and pulling mechanism 26 can pull the rolled steel sheet out from the rolling and positioning mechanism 25. When the steel sheet moves, it will drive the first roller 252c to roll, which plays a guiding role in the transfer of the steel strip.

[0031] Based on the above embodiments, the clamping and pulling-out mechanism 26 includes a Y-axis linear drive mechanism 260, a third support 261 drivenly connected to the Y-axis linear drive mechanism 260, a first clamping assembly 262, and a second clamping assembly 263. Both the first clamping assembly 262 and the second clamping assembly 263 include a lower clamping arm 262a, a connecting rod 262b hinged to the top of the lower clamping arm 262a, an upper clamping arm 262c hinged to one end of the connecting rod 262b, and a clamping cylinder 262d. The other end of the connecting rod 262b is hinged to the output shaft of the clamping cylinder 262d. The lower clamping arm 262a and the clamping cylinder 262d of the first clamping assembly 262 are both fixedly connected to the third support 261. At the top of the third support 261, an X-axis slide block 264 is slidably connected to the top of the third support 261 along the X-axis direction. An X-axis drive cylinder 264a is provided at the top of the third support 261 and is drivenly connected to the X-axis slide block 264. The lower clamping arm 262a and the clamping cylinder 262d of the second clamping assembly 263 are fixedly connected to the top of the X-axis slide block 264. The top of the second transverse support column 253 is provided with a first receiving groove 253b and a second receiving groove 253c located on both sides of the strip receiving groove 253a. The lower clamping arm 262a of the first clamping assembly 262 and the second clamping assembly 263 are respectively provided with the first receiving groove 253b and the second receiving groove 253c. Specifically, initially, the lower clamping arms 262a of the first clamping assembly 262 and the second clamping assembly 263 are located in the first receiving groove 253b and the second receiving groove 253c, respectively. When the clamping pull-out mechanism 26 needs to pull the steel sheet out from the rolling positioning mechanism 25, the X-axis slide 264 is first moved by the X-axis drive cylinder 264a to adjust the distance between the first clamping assembly 262 and the second clamping assembly 263. Then, the clamping cylinder 262d of the first clamping assembly 262 and the second clamping assembly 263 drives its connecting rod 262b to move so that the upper clamping arm 262c closes. The end of the steel sheet will be clamped by the upper clamping arm 262c and the lower clamping arm 262a. Then, the third support 261 is moved backward by the Y-axis linear drive mechanism 260, so that the steel sheet can be pulled out from the clamping pull-out mechanism 26. While the steel sheet is being pulled out, the laser welding mechanism 27 welds the gaps at both ends of the steel sheet.

[0032] Based on the above embodiments, the second conveying mechanism 22 includes an outer cover 220 and a conveying mechanism 221 disposed inside the outer cover 220. The outer cover 220 includes two first side plates 220a disposed side by side and a base plate 220b fixedly connected between the bottoms of the two first side plates 220a. The preliminary rolling mechanism 23 includes a first bending mechanism 230 and a second bending mechanism 231. The first bending mechanism 230 includes a first bending cylinder 230a fixedly connected between one end of the two first side plates 220a and a third C-shaped support member 230b drivenly connected to the first bending cylinder 230a. A plurality of second rollers 230c are rotatably connected side by side to the front end of the third C-shaped support member 230b. The second bending mechanism 231 includes a second bending cylinder 231a disposed on the base plate 220b and a push plate 231b drivenly connected to the second bending cylinder 231a. Specifically, when the second conveying mechanism 22 conveys the steel sheet to the preliminary rolling mechanism 23, the third C-shaped support 230b is driven forward by the first bending cylinder 230a. The second roller 230c will press against the steel sheet and bend it. Then, the second bending cylinder 231a drives the push plate 231b to move forward. When the steel sheet is rolled, it will press against the outside of the push plate 231b, which can limit the rolling of the steel sheet. The steel sheet is rolled into an arc shape. When the pushing mechanism 24 pushes the steel sheet onto the rolling positioning mechanism 25, the steel sheet will drive the second roller 230c to rotate, which plays a guiding role.

[0033] Based on the above embodiments, the laser welding mechanism 27 includes a bracket 270, an X-axis linear drive mechanism 271 mounted on the bracket 270, a Z-axis linear drive mechanism 272 driven and connected to the X-axis linear drive mechanism 271, and a laser welding module 273 driven and connected to the Z-axis linear drive mechanism 272. The X-axis linear drive mechanism 271 can move the laser welding module 273 left and right to adjust its lateral position. The Z-axis linear drive mechanism 272 can move the laser welding module 273 downwards, allowing it to weld the gaps at both ends of the steel strip.

[0034] Based on the above embodiments, the frame 410 includes two second side plates 410a arranged side by side on the top of the base 40, a back plate 410b fixedly connected between one end of the two second side plates 410a, and a top plate 410c fixedly connected between the tops of the two second side plates 410a and the back plate 410b. An X-axis movable groove 410d is provided through the top plate 410c. A transverse connecting plate 412d is fixedly connected to the top of the lower slide plate 412b. A longitudinal connecting plate 412e is fixedly connected between the transverse connecting plate 412d and the upper slide plate 411a. The longitudinal connecting plate 412e is movably arranged on the X-axis movable groove 410d. A sliding hydraulic cylinder 413 is arranged on the back plate 410b and its output shaft is fixedly connected to the longitudinal connecting plate 412e. When the sliding hydraulic cylinder 413 is working, it will drive the longitudinal connecting plate 412e to move left and right on the X-axis movable groove 410d, thereby driving the upper roller 411d and the lower roller 412c to move back and forth to perform rolling operation on the seam.

[0035] Based on the above embodiments, the clamping mechanism 42 includes a gantry frame 420 disposed on the top of the top plate 410c, and two symmetrically arranged clamping assemblies. Each clamping assembly includes a clamping drive cylinder 421 hinged to one side of the gantry frame 420, two connecting arms 422 fixedly connected in parallel to the second side plate 410a, and a clamping arm 423 hinged between the two connecting arms 422. The output shaft of the clamping drive cylinder 421 is hinged to one end of the clamping arm 423. After the wheel hub is hung on the X-axis slide rail 412a, the clamping drive cylinders 421 on both sides drive the clamping arm 423 to move, so that one end of the clamping arm 423 presses against one end of the wheel hub. The end of the wheel hub is pressed between the top of the X-axis slide rail 412a and one end of the clamping arm 423, thereby positioning the end of the wheel hub.

[0036] Based on the above embodiments, the ejection mechanism 43 includes two symmetrically arranged second pusher cylinders 430 and a second pusher plate 431. The second pusher cylinders 430 are disposed on the inner side wall of the second side plate 410a. The output shafts of the two second pusher cylinders 430 are respectively fixedly connected to one end of the second pusher plate 431. The second pusher plate 431 is provided with a clearance groove 431a that matches the X-axis slide rail 412a. The X-axis slide rail 412a is disposed in the clearance groove 431a. After the wheel hub completes the seam pressing operation, the second pusher cylinders 430 drive the second pusher plate 431 to move forward, so that the second pusher plate 431 ejects the wheel hub on the X-axis slide rail 412a for unloading.

[0037] Based on the above embodiments, it also includes two parallel chillers 5, which are used to cool the leveled steel strip.

[0038] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A full-automatic edge rolling and welding production line for an electric vehicle wheel hub, characterized in that, The system includes two parallel feeding and leveling machines, two parallel cutting, rolling, and welding machines, a robot, and a seaming machine. The cutting, rolling, and welding machines include a first conveying mechanism, a cutting and marking mechanism, a second conveying mechanism, a preliminary rolling mechanism, a pushing mechanism, a rolling and positioning mechanism, a clamping and pulling mechanism, and a laser welding mechanism. The first conveying mechanism conveys the steel strip to the cutting and marking mechanism, which cuts the steel strip into steel sheets of a specified length. The second conveying mechanism conveys the steel sheets to the preliminary rolling mechanism. The preliminary rolling mechanism is used to initially roll the steel sheet into an arc shape. The pushing mechanism is used to push the arc-shaped steel sheet onto the rolling positioning mechanism. The rolling positioning mechanism is used to roll the arc-shaped steel sheet into a circle and shape it. The clamping and pulling-out mechanism is used to clamp and position the shaped circular steel sheet at both ends and pull it out from the rolling positioning mechanism. The laser welding mechanism welds the two ends of the circular steel sheet clamped on the clamping and pulling-out mechanism together. The feeding and leveling machine is used to level the steel strip of the coil and convey it to the first conveying mechanism. The seam pressing machine includes a base, a seam pressing mechanism, a pressing mechanism, and an ejection mechanism. The seam pressing mechanism includes a frame disposed on the top of the base, an upper rolling mechanism, a lower rolling mechanism, and a sliding hydraulic cylinder. The upper rolling mechanism includes an upper slide plate slidably connected to the frame along the X-axis, a seam pressing hydraulic cylinder disposed on the top of the upper slide plate, a roller seat drivenly connected to the seam pressing hydraulic cylinder, and an upper roller rotatably connected to the roller seat. The lower rolling mechanism includes an X-axis slide rail disposed on the top of the base and a slide rail slidably connected to the X-axis slide rail. The upper and lower slide plates are fixedly connected to the upper slide plate and rotatably connected to the lower slide plate. The sliding hydraulic cylinder is located on one side of the frame to drive the upper and lower slide plates to move along the X-axis. The clamping mechanism is used to press the two ends of the wheel hub against the top of the X-axis slide rail. The ejection mechanism is used to eject the wheel hub from the X-axis slide rail. The robot is used to pick up the welded wheel hub from the clamping and pulling mechanism and place it on the X-axis slide rail, and to take the pressed wheel hub out of the X-axis slide rail to the next station.

2. The fully automated rolling and welding production line for electric vehicle wheel hubs according to claim 1, characterized in that, The pushing mechanism includes a first support, a first transverse support column fixedly connected to one side of the first support, and a pushing assembly. The pushing assembly includes two first pushing cylinders symmetrically arranged on the first support and a first pushing plate. The first pushing cylinders are drivenly connected to the first pushing plate. The top of the first pushing plate is provided with a first arc-shaped clearance groove, and the first transverse support column is disposed on the first arc-shaped clearance groove. The rolling positioning mechanism includes a ring positioning mechanism and an end clamping mechanism. The ring positioning mechanism includes a second support, two first positioning components, and two second positioning components. The second support includes two parallel upright plates. The top of the upright plates is provided with a second arc-shaped clearance groove. The two first positioning components are symmetrically arranged on both sides of the second support. The first positioning component includes a first positioning cylinder fixedly connected between the two upright plates and a first C-shaped support member drivenly connected to the first positioning cylinder. The second positioning components are symmetrically arranged on both sides of the second support. The second positioning components include a second positioning cylinder fixedly connected between the two upright plates and a second C-shaped support member driven by the second positioning cylinder. Several first rollers are rotatably connected to the front end of the second C-shaped support member. The end pressing mechanism includes a second transverse support column assembled at one end of the first transverse support column, a lifting cylinder, a pressure plate, and a pressing component disposed at the bottom of the second transverse support column. The pressure plate includes a pressing part and a limiting part connected in a "T" shape. A strip-shaped receiving groove matching the limiting part is provided at the top of the second transverse support column. The limiting part is movably disposed on the strip-shaped receiving groove. A through hole communicating with the strip-shaped receiving groove is provided through the second transverse support column. A top rod driven by the lifting cylinder is movably disposed on the through hole. The pressing component includes a pressing cylinder and a pressing block driven by the pressing cylinder.

3. The fully automated rolling and welding production line for electric vehicle wheel hubs according to claim 2, characterized in that, The clamping and pulling-out mechanism includes a Y-axis linear drive mechanism, a third support driven by the Y-axis linear drive mechanism, a first clamping assembly, and a second clamping assembly. Both the first and second clamping assemblies include a lower clamping arm, a connecting rod hinged to the top of the lower clamping arm, an upper clamping arm hinged to one end of the connecting rod, and a clamping cylinder. The other end of the connecting rod is hinged to the output shaft of the clamping cylinder. The lower clamping arm and clamping cylinder of the first clamping assembly are fixedly connected to the top of the third support. An X-axis slide block is slidably connected to the top of the third support along the X-axis direction. An X-axis drive cylinder, driven by the X-axis slide block, is located on the top of the third support. The lower clamping arm and clamping cylinder of the second clamping assembly are fixedly connected to the top of the X-axis slide block. The top of the second transverse support column has a first receiving groove and a second receiving groove located on both sides of the strip-shaped receiving groove. The lower clamping arms of the first and second clamping assemblies are respectively corresponding to the first and second receiving grooves.

4. The fully automated rolling and welding production line for electric vehicle wheel hubs according to claim 3, characterized in that, The second conveying mechanism includes an outer cover and a conveying mechanism disposed inside the outer cover. The outer cover includes two first side plates arranged side by side and a base plate fixedly connected between the bottoms of the two first side plates. The preliminary rolling mechanism includes a first bending mechanism and a second bending mechanism. The first bending mechanism includes a first bending cylinder fixedly connected between one end of the two first side plates and a third C-shaped support member driven by the first bending cylinder. The front end of the third C-shaped support member is rotatably connected with a plurality of second rollers arranged side by side. The second bending mechanism includes a second bending cylinder disposed on the base plate and a push plate driven by the second bending cylinder.

5. The fully automated rolling and welding production line for electric vehicle wheel hubs according to claim 4, characterized in that, The laser welding mechanism includes a support, an X-axis linear drive mechanism disposed on the support, a Z-axis linear drive mechanism driven and connected to the X-axis linear drive mechanism, and a laser welding module driven and connected to the Z-axis linear drive mechanism.

6. A fully automated rolling and welding production line for electric vehicle wheel hubs according to claim 1 or 5, characterized in that, The frame includes two second side plates arranged side by side on the top of the base, a back plate fixedly connected between one end of the two second side plates, and a top plate fixedly connected between the top of the two second side plates and the back plate. An X-axis movable groove is provided through the top plate. A transverse connecting plate is fixedly connected to the top of the lower slide plate. A longitudinal connecting plate is fixedly connected between the transverse connecting plate and the upper slide plate. The longitudinal connecting plate is movably disposed on the X-axis movable groove. The sliding hydraulic cylinder is disposed on the back plate and its output shaft is fixedly connected to the longitudinal connecting plate.

7. The fully automated rolling and welding production line for electric vehicle wheel hubs according to claim 6, characterized in that, The clamping mechanism includes a gantry frame disposed on the top of the top plate and two symmetrically arranged clamping assemblies. Each clamping assembly includes a clamping drive cylinder hinged to one side of the gantry frame, two connecting arms fixedly connected in parallel to the second side plate, and a clamping arm hinged between the two connecting arms. The output shaft of the clamping drive cylinder is hinged to one end of the clamping arm.

8. The fully automated rolling and welding production line for electric vehicle wheel hubs according to claim 7, characterized in that, The ejection mechanism includes two symmetrically arranged second pusher cylinders and a second pusher plate. The second pusher cylinders are disposed on the inner side wall of the second side plate. The output shafts of the two second pusher cylinders are respectively fixedly connected to one end of the second pusher plate. The second pusher plate is provided with a clearance groove that matches the X-axis slide rail. The X-axis slide rail is disposed in the clearance groove.

9. The fully automated rolling and welding production line for electric vehicle wheel hubs according to claim 1, characterized in that, It also includes two side-by-side chillers used to cool the leveled steel strip.

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