Automatic conveying device of complex curved surface valve outer wall laser cleaning production line

Abstract

The invention discloses an automatic conveying device of a complex curved surface valve outer wall laser cleaning production line, which comprises a tray conveying device extending along the longitudinal direction, a material frame conveying device is transversely arranged at the tail end of the tray conveying device, and the tray conveying device and the material frame conveying device are distributed in a T-shaped structure; the tray conveying device comprises a tray forward chain type conveyor and a tray reverse chain type conveyor which are arranged side by side and are equal in length, the head ends and the tail ends of the tray forward chain type conveyor and the tray reverse chain type conveyor are each transversely provided with a tray transverse conveyor, and each tray transverse conveyor comprises a tray short-distance conveyor arranged on the top. And the tray short-distance conveyor is fixed on a movable tray capable of transversely moving. According to the whole automatic conveying device, automatic conveying of workpieces can be achieved, meanwhile, the empty trays and the empty material frames can be circulated and returned to the corresponding conveying head ends, and guarantee is provided for continuous laser cleaning work.

Description

TECHNICAL FIELD

[0001] The present application relates to a tray conveying device, in particular to an automatic conveying device for a complex curved surface valve outer wall laser cleaning production line. BACKGROUND

[0002] The existing technology for rust removal of complex curved surface valve outer wall mainly has two kinds: one is high-pressure water cleaning, and the other is shot blasting rust removal, but both methods have reached the technical bottleneck. Among them, the high-pressure water cleaning method cannot effectively remove the paint on the surface of the valve parts, and the paint that originally adheres well may soften and fall off after the valve is cleaned twice by ultrasonic waves, causing secondary pollution in the valve channel. Shot blasting rust removal can effectively clean the surface paint, rust, etc., but for valve parts with high internal precision, there is a hidden danger of steel shots entering the internal part, causing poor valve action.

[0003] Laser cleaning technology has been widely used in various fields, but for valve fittings with complex structure of outer curved surface, manual laser cleaning is still the main method, and there is no automatic production line that can realize batch and efficient cleaning. Therefore, we plan to develop and design a corresponding laser cleaning automatic production line. The automatic production line generally includes a tray conveying device, a laser cleaning device, a feeding device, and a material frame conveying device. The automatic conveying device realizes the automatic conveying of the workpiece and the tray. The laser cleaning device realizes the automatic laser cleaning of the workpiece, the feeding device realizes the transfer of the cleaned workpiece to the material frame of the conveying adapter device, and the material frame conveying device transfers the cleaned workpiece to the next process.

[0004] Since the valve fittings with complex structure of outer curved surface are mainly cleaned by manual laser cleaning, there is no mature automatic production line technology scheme to be used for reference. In the design and development process of the entire automatic production line, the automatic conveying device is the most important component, which is composed of a tray conveying device and a material frame conveying device, and is responsible for the automatic conveying of the workpiece in the entire process. Therefore, how to design the structure of the automatic conveying device becomes a technical problem that needs to be solved. SUMMARY

[0005] The present application relates to a tray conveying device, in particular to an automatic conveying device for a complex curved surface valve outer wall laser cleaning production line.

[0006] The technical scheme of the present application is an automatic conveying device of a complex curved surface valve outer wall laser cleaning production line, comprising a tray conveying device extending longitudinally, a material frame conveying device is arranged transversely at the tail end of the tray conveying device, and the two are distributed in a T-shaped structure; the tray conveying device comprises a tray forward chain conveyor and a tray reverse chain conveyor arranged side by side and equally long, a tray transverse conveyor is arranged transversely at the head and tail ends of the tray forward chain conveyor respectively, the tray transverse conveyor comprises a tray short-distance conveyor arranged on the top, and the tray short-distance conveyor is fixed on a movable tray which can move transversely;

[0007] A tray forward chain conveyor is arranged on each side of the tray reverse chain conveyor; the tray transverse conveyors at the head and tail ends each comprise two tray short-distance conveyors, and each of the two tray short-distance conveyors is fixed on a movable tray;

[0008] The material frame conveying device comprises a lower chain conveyor, an upper chain conveyor equally long with the lower chain conveyor is arranged directly above the lower chain conveyor, a lifting conveyor is arranged adjacent to the left and right ends of the two chain conveyors, and a transfer device is further arranged adjacent to the right end of the right lifting conveyor.

[0009] In the foregoing automatic conveying device of the complex curved surface valve outer wall laser cleaning production line, a transverse linear module and a transverse guide rod are transversely mounted on the top of the rack of the tray transverse conveyor, the sliding table of the transverse linear module is fixedly connected with the bottom of the movable tray, and the bottom of the movable tray is further fixed with a guide block which is slidingly sleeved on the transverse guide rod.

[0010] In the foregoing automatic conveying device of the complex curved surface valve outer wall laser cleaning production line, a limiting device is arranged at a distance apart between the tray forward chain conveyors; a limiting device is arranged at the tail end of the tray reverse chain conveyor; and a pair of photoelectric switches mounting racks are further arranged on the inner and outer racks at the head end of the top of the tray forward chain conveyor, and a plurality of pairs of photoelectric switches are arranged on the photoelectric switches mounting racks.

[0011] In the foregoing automatic conveying device of the complex curved surface valve outer wall laser cleaning production line, the lifting conveyor comprises a mounting base, a jacking cylinder is vertically mounted on the mounting base, a mounting body is connected to the head end of the push rod of the jacking cylinder, a horizontal rotating rod is inserted into the mounting body, a sprocket is arranged on the horizontal rotating rod, the sprocket is connected with a chain, one end of the chain is fixed on the mounting base and the other end is fixedly connected with a vertical mounting plate, a sliding block is arranged on the vertical mounting plate, the sliding block is slidingly sleeved on a guide rod which is vertically fixed on the mounting base, a support frame horizontally extending forward is further arranged on the vertical mounting plate, and a short-distance chain conveyor is arranged on the support frame.

[0012] In the aforementioned automated conveying device for a laser cleaning production line for complex curved valve outer walls, sprockets are provided at both ends of the horizontal rotating rod; a connecting block is provided on the back of the vertical mounting plate, and the other end of the chain is fixedly connected to the connecting block.

[0013] In the aforementioned automated conveying device for a laser cleaning production line for complex curved valve outer walls, two sliders are provided on the upper and lower sides of the left and right sides of the back of the vertical mounting plate; two guide rods are provided, and the tops of the two guide rods are fixedly connected together by a connecting plate.

[0014] In the aforementioned automated conveying device for a laser cleaning production line for complex curved valve outer walls, the lower chain conveyor and the upper chain conveyor are equipped with stop devices spaced a distance apart along their length.

[0015] In the aforementioned automated conveying device of a laser cleaning production line for complex curved valve outer walls, one or a group of stop devices are arranged at intervals along the length of the upper chain conveyor. When the stop devices are set as a group, they are set at the loading station of the upper chain conveyor. A group of stop devices consists of multiple stop devices arranged sequentially at intervals.

[0016] In the aforementioned automated conveying device for a laser cleaning production line for complex curved valve outer walls, the upper chain conveyor is provided with at least one feeding station, a protective plate is provided at the feeding station, the bottom of the protective plate is fixed to the push rod of the support cylinder, and the support cylinder is fixed to the frame of the upper chain conveyor.

[0017] In the aforementioned automated conveying device for a laser cleaning production line for complex curved valve outer walls, the transfer device is a lifting car, and a short-distance chain conveyor is installed inside the lifting car.

[0018] The beneficial effects of this invention are as follows: Compared with the prior art, this invention, by setting up a pallet conveyor and a material frame conveyor in a T-shaped structure, allows the workpieces to be laser-cleaned to be transported along with the pallet. During transport, the workpieces are cleaned by the laser cleaning device. At the end of the transport, a feeding device transfers the cleaned workpieces to the material frame, while the empty pallet is returned to its starting point via the pallet conveyor. The material frame conveyor transports the cleaned workpieces to the next process step and can also return empty material frames to the starting point of the material frame conveyor. The entire automated conveying device can automatically transport workpieces while simultaneously cyclically returning empty pallets and empty material frames to their respective conveying heads, ensuring the continuous operation of the laser cleaning process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 for Figure 1 A top-view structural diagram;

[0021] Figure 3 This is a schematic diagram of the pallet conveyor system.

[0022] Figure 4 This is a schematic diagram of the material frame conveying device.

[0023] Figure 5 for Figure 4 A top-view structural diagram;

[0024] Figure 6 for Figure 4 A schematic diagram of the structure without a transfer device;

[0025] Figure 7 for Figure 6 A schematic diagram of the side structure;

[0026] Figure 8 A schematic diagram of the conveyor structure is provided.

[0027] Figure 9 A structural diagram for raising the conveyor to another angle.

[0028] Reference numerals: 1-Pallet conveyor, 101-Pallet forward chain conveyor, 102-Pallet reverse chain conveyor, 103-Pallet transverse conveyor, 104-Pallet short-distance conveyor, 105-Moving pallet, 106-Transverse linear module, 107-Transverse guide rod, 108-Guide block, 109-Limiting device, 110-Through-photoelectric switch mounting bracket, 2-Frame conveyor, 201-Lower chain conveyor, 202-Upper chain conveyor 203-Lifting conveyor, 204-Transfer device, 205-Mounting base, 206-Lifting cylinder, 207-Mounting body, 208-Horizontal rotating rod, 209-Sprocket, 210-Chain, 211-Vertical mounting plate, 212-Slider, 213-Guide rod, 214-Support frame, 215-Short distance chain conveyor, 216-Connecting block, 217-Connecting plate, 218-Stop device, 219-Protective plate. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0030] An embodiment of the present invention: An automated conveying device for a laser cleaning production line for complex curved valve outer walls includes a longitudinally extending pallet conveyor 1 and a transversely arranged material frame conveyor 2 at the tail end of the pallet conveyor 1, the two being distributed in a T-shape. The pallet conveyor 1 includes a pallet forward chain conveyor 101 and a pallet reverse chain conveyor 102 arranged side-by-side and of equal length. A pallet transverse conveyor 103 is transversely arranged at both ends of the pallet forward chain conveyor 101. The length of the pallet transverse conveyor 103 is equal to the sum of the widths of the pallet forward chain conveyor 101 and the pallet reverse chain conveyor 102. The pallet transverse conveyor 103 includes a pallet short-distance conveyor 104 mounted on top, fixed to a transversely movable pallet 105. The conveying direction of the pallet short-distance conveyor 104 can be consistent with the conveying directions of the pallet forward chain conveyor 101 and the pallet reverse chain conveyor 102.

[0031] In use, the workpiece to be laser cleaned is placed on the tray of the short-pitch pallet conveyor 104 at the head end of the pallet forward chain conveyor 101. The short-pitch pallet conveyor 104 moves laterally to the front of the pallet forward chain conveyor 101 under the action of the moving pallet 105, so that the short-pitch pallet conveyor 104 is aligned with the pallet forward chain conveyor 101. Then, the short-pitch pallet conveyor 104 starts to maintain the same conveying direction as the pallet forward chain conveyor 101, thereby transferring the pallet loaded with the workpiece from the short-pitch pallet conveyor 104 to the pallet forward chain conveyor 101.

[0032] Next, the pallet 105 is moved to drive the pallet short-distance conveyor 104 to move laterally in the opposite direction until it aligns with the tail end of the pallet reverse chain conveyor 102. Since the conveying directions of the pallet reverse chain conveyor 102 and the pallet forward chain conveyor 101 are exactly opposite, the head end of the pallet forward chain conveyor 101 is exactly the tail end of the pallet reverse chain conveyor 102. At this time, the conveying direction of the pallet short-distance conveyor 104 at the tail end of the pallet reverse chain conveyor 102 is the same as the conveying direction of the pallet reverse chain conveyor 10, so that the empty pallet on the pallet reverse chain conveyor 10 can be transferred to the pallet short-distance conveyor 104.

[0033] After the pallet loaded with workpieces is transferred to the pallet forward chain conveyor 101, the workpieces to be cleaned will pass through two laser cleaning stations during the process of being conveyed along the pallet forward chain conveyor 101. The workpieces to be cleaned are then laser cleaned by the laser cleaning device. After cleaning, the workpieces are finally moved to the tail end of the pallet forward chain conveyor 101. At this time, the pallet short-distance conveyor 104 at the tail end of the pallet forward chain conveyor 101 moves laterally to the tail end of the pallet forward chain conveyor 101 under the action of the moving pallet 105, and maintains the same conveying direction as the pallet forward chain conveyor 101. Thus, the cleaned workpieces, together with the pallet, are transferred to the pallet short-distance conveyor 104 at the tail end of the pallet forward chain conveyor 101. After the pallet containing the cleaned workpieces has been completely transferred, the unloading device located at the tail end of the pallet conveyor 1 and directly above the material frame conveyor 2 will operate to clamp the cleaned workpieces and place them into the material frame on the material frame conveyor 2. The material frame conveyor 2 will then transport the material frame along with the workpieces to the next process. The next process will remove the cleaned workpieces, and the empty material frame will return to its head end under the action of the material frame conveyor 2, ready for the next loading task.

[0034] After the cleaned workpieces on the short-distance pallet conveyor 104 at the tail end of the pallet forward chain conveyor 101 are transferred to the material frame conveyor 2, the short-distance pallet conveyor 104 will move laterally to the head end of the pallet reverse chain conveyor 102 under the action of the moving pallet 105. Then, it will start to maintain the same conveying direction as the pallet reverse chain conveyor 102, thereby transferring the empty pallet on the short-distance pallet conveyor 104 to the pallet reverse chain conveyor 102. The empty pallet is conveyed along the pallet reverse chain conveyor 102 to its tail end, and then transferred to the short-distance pallet conveyor 104 at the tail end of the pallet reverse chain conveyor 102. This process is repeated, so that the workpieces, together with the pallets, can be conveyed from the head end to the tail end of the pallet conveyor 1, while the empty pallets can be returned from the tail end to the head end of the pallet conveyor 1.

[0035] The pallet transverse conveyor 103 has a transverse linear module 106 and a transverse guide rod 107 horizontally mounted on the top of its frame. The slide of the transverse linear module 106 is fixedly connected to the bottom of the moving pallet 105. A guide block 108 is also fixed to the bottom of the moving pallet 105, and the guide block 108 is slidably sleeved on the transverse guide rod 107. When the pallet short-distance conveyor 104 needs to move, the transverse linear module 106 moves, causing the moving pallet 105 to move linearly following its slide.

[0036] The pallet reverse chain conveyor 102 has a pallet forward chain conveyor 101 on each side; the pallet transverse conveyors 103 at both ends each include two pallet short-distance conveyors 104, each fixed to a movable pallet 105. This means that the two pallet forward chain conveyors 101 transport the workpieces to be cleaned along with their pallets, improving cleaning efficiency. The two pallet forward chain conveyors 101 share a single pallet reverse chain conveyor 102; empty pallets from both pallet forward chain conveyors 101 are returned to the head of the pallet conveying device 1 via the same reverse chain conveyor 102. Since each pallet short-distance conveyor 104 serves only one pallet forward chain conveyor 101, the number of pallet short-distance conveyors 104 needs to be increased accordingly when the number of pallet forward chain conveyors 101 increases. When an empty pallet returns to the tail of the pallet reverse chain conveyor 102, whether the empty pallet should be transferred to the pallet short-distance conveyor 104 corresponding to the left or right pallet forward chain conveyor 101 is controlled by the controller based on the number of workpieces to be cleaned on each pallet forward chain conveyor 101, or by manual control by the worker.

[0037] The pallet forward chain conveyor 101 is equipped with limit devices 109 at intervals. These limit devices 109 ensure that the pallets stop at a fixed position, facilitating the cleaning of workpieces by the laser cleaning device and preventing subsequent pallets from colliding with the preceding pallets. The pallet reverse chain conveyor 102 has two limit devices 109 at its tail end. The front limit device 109 blocks multiple empty pallets, separating the rear empty pallets from the front empty pallet. The rear limit device 109 blocks the frontmost empty pallet. When the pallet short-distance conveyor 104 moves to the front of the tail end of the pallet reverse chain conveyor 102, the limit devices 109 on the pallet reverse chain conveyor 102 stop functioning, allowing an empty pallet to be conveyed onto the pallet short-distance conveyor 104.

[0038] The pallet forward chain conveyor 101 is also equipped with a laser beam switch mounting bracket 110 on the inner and outer sides of the top head end frame. Multiple sets of laser beam switches are arranged along the length of the mounting bracket 110. Since the workpieces to be cleaned are not limited to a single model, different models require different laser cleaning and unloading programs. Furthermore, different models of workpieces have different lengths. Therefore, by setting multiple sets of laser beam switches, the dimensions of the corresponding workpiece can be detected, thereby determining the specific model of the workpiece.

[0039] The material frame conveying device 2 includes a lower chain conveyor 201, an upper chain conveyor 202 of the same length above the lower chain conveyor 201, a feeding device above the upper chain conveyor 202, and a lifting conveyor 203 adjacent to each of the left and right ends of the two chain conveyors. A transfer device 204 is also adjacent to the right end of the right lifting conveyor 203.

[0040] The lower chain conveyor 201 and the upper chain conveyor 202 have the same conveying direction, while the two lifting conveyors 203 can switch to different conveying directions depending on their respective positions. After the lower feeding device clamps the cleaned workpiece, it places the cleaned workpiece into the empty material frame on the upper chain conveyor 202. The upper chain conveyor 202 then conveys the material frame loaded with the workpiece to its tail end. At this time, the height of the right-side lifting conveyor 203 is flush with that of the upper chain conveyor 202, and its conveying direction is the same as that of the upper chain conveyor 202. This transfers the workpiece along with the material frame to the right-side lifting conveyor 203, which then transfers it to the transfer device 204. The transfer device 204 then transfers the material frame and workpiece together... The empty material frame is transferred to the next process, where the workpiece is removed. The empty material frame is then transported back to its starting point via the transfer device 204. At this point, the right-side lifting conveyor 203 is still flush with the upper chain conveyor 202. When the conveying direction is reversed, the empty material frame is transferred to the right-side lifting conveyor 203. The right-side lifting conveyor 203 descends to be flush with the lower chain conveyor 201, and then the material frame is transferred to the lower chain conveyor 201. Then, the right-side lifting conveyor 203 ascends to continue transferring the next material frame loaded with a workpiece. The empty material frame is conveyed to its left side by the lower chain conveyor 201. At this time, the left-side lifting conveyor 203 is aligned with the lower chain conveyor 201 and maintains the same conveying direction, thus transferring the empty material frame onto the left-side lifting conveyor 203. Then, the left-side lifting conveyor 203 rises until it is aligned with the upper chain conveyor 202, and then the left-side lifting conveyor 203 starts again, this time with the same conveying direction as the upper chain conveyor 202, thus transferring the empty material frame onto the upper chain conveyor 202. This process is repeated, thereby achieving the transfer of workpieces to the next process while realizing the cyclical reuse of empty material frames.

[0041] The lifting conveyor 203 includes a mounting base 205, on which a lifting cylinder 206 is vertically mounted. The push rod end of the lifting cylinder 206 is connected to a mounting body 207. A horizontal rotating rod 208 is inserted into the mounting body 207. A sprocket 209 is provided on the horizontal rotating rod 208. The sprocket 209 is connected to a chain 210. One end of the chain 210 is fixed to the mounting base 205, and the other end is fixedly connected to a vertical mounting plate 211. A slider 212 is provided on the vertical mounting plate 211. The slider 212 is slidably sleeved on a guide rod 213. The guide rod 213 is vertically fixed to the mounting base 205. A horizontally forward-extending support frame 214 is also provided on the vertical mounting plate 211. A short-distance chain conveyor 215 is provided on the support frame 214.

[0042] In use, the empty material frame is placed on the upper chain conveyor 202 and conveyed from the left end to the right end. When the empty material frame reaches the unloading device, it stops moving forward, and the unloading device places the laser-cleaned workpiece into the empty material frame. Then, the material frame loaded with workpieces continues to move forward. At the same time, the right-side lifting conveyor 203 moves, causing its short-distance chain conveyor 215 to rise to the same height as the upper chain conveyor 202. Specifically, the lifting process is achieved by the lifting cylinder 206. The push rod is pushed upward, causing the horizontal rotating rod 208 to move upward. Since the length of the chain 210 is fixed, when the distance from the end of the chain 210 connected to the mounting base 205 to the sprocket 209 increases, and conversely, the distance from the end connected to the vertical mounting plate 211 decreases, the lifting action of the chain 210 will cause the vertical mounting plate 210 to move upward along the guide rod 213. The vertical mounting plate 210 will then drive the support frame 214 and the short-distance chain conveyor 215 to move upward together. Conversely, when the push rod of the lifting cylinder 206 retracts downward, the vertical mounting plate 210 will drive the support frame 214 and the short-distance chain conveyor 215 to move downward together. When the short-distance chain conveyor 215 rises to the high position, its top is flush with the top of the upper chain conveyor 202; when it descends to the low position, it is flush with the top of the lower chain conveyor 201.

[0043] When the workpiece-loaded frame moves to the rightmost end of the upper chain conveyor 202, the short-distance chain conveyor 215 of the right-side lifting conveyor 203 starts, and its conveying direction is consistent with that of the upper chain conveyor 202, so that the workpiece-loaded frame is transferred from the upper chain conveyor 202 to the short-distance chain conveyor 215 of the right-side lifting conveyor 203. The short-distance chain conveyor 215 continues to run, and then transfers the workpiece-loaded frame to the transfer device 204, which then conveys the frame to the next process.

[0044] After the worker or equipment in the next process removes the workpiece, the transfer device 204 moves in the opposite direction with the empty material frame. At this time, the short-distance chain conveyor 215 of the right-side lifting conveyor 203 is still in a high position and has stopped running. When the transfer device 204 transports the empty material frame to the right-side lifting conveyor 203, the short-distance chain conveyor 215 of the right-side lifting conveyor 203 rotates in the opposite direction, so that the conveying direction of the short-distance chain conveyor 215 is opposite to the conveying direction of the upper chain conveyor 202. The empty material frame is transferred to the short-distance chain conveyor 215 of the right-side lifting conveyor 203 by the transfer device 204.

[0045] Then, the short-distance chain conveyor 215 of the right-side lifting conveyor 203 descends to a low position under the action of the lifting cylinder 206, and then rotates again in the opposite direction to the upper chain conveyor 202, so that the empty material frame is transferred from the short-distance chain conveyor 215 of the right-side lifting conveyor 203 to the right side of the lower chain conveyor 1. The conveying direction of the lower chain conveyor 201 is exactly opposite to the conveying direction of the upper chain conveyor 202. The empty material frame is conveyed from its right side to its left side through the lower chain conveyor 201. During the conveying process, the short-distance chain conveyor 215 of the right-side lifting conveyor 203 moves up to be level with the upper chain conveyor 202, and conveys the next material frame loaded with workpieces.

[0046] When the empty material frame is conveyed from the right end of the lower chain conveyor 201 to the left end, the short-distance chain conveyor 215 of the left-side lifting conveyor 203 should be in the lower position and maintain the same conveying direction as the lower chain conveyor 201, so that the empty material frame is transferred from the lower chain conveyor 201 to the short-distance chain conveyor 215 of the left-side lifting conveyor 203. Then, the short-distance chain conveyor 215 of the left-side lifting conveyor 203 stops operating and rises to be flush with the upper chain conveyor 202 under the action of the lifting cylinder 206.

[0047] Then, the short-distance chain conveyor 215 of the left-side lifting conveyor 203 starts again, and its conveying direction is consistent with that of the upper chain conveyor 202, thereby transferring the empty material frame to the upper chain conveyor 202. In this way, a closed-loop conveying system is formed to realize the cyclic conveying of the material frame.

[0048] During the material frame conveying process, when there is a material frame in the transfer device 204, or when the short-distance chain conveyor 215 at the right end is in an ascending or descending state, even if the material frame loaded with workpieces on the upper chain conveyor 202 has moved to the right end, the material frame loaded with workpieces should not continue to be conveyed forward until the empty material frame is transferred by the transfer device 204 to the lower chain conveyor 201 by the short-distance chain conveyor 215 of the right end lifting conveyor 203, and when the short-distance chain conveyor 215 of the right end lifting conveyor 203 rises to a high position, the material frame loaded with workpieces at the rightmost end of the upper chain conveyor 202 will be transferred to the short-distance chain conveyor 215 of the right end lifting conveyor 203.

[0049] Similarly, when the short-distance chain conveyor 215 on the left end moves up or down, even if the empty material frame on the lower chain conveyor 201 has moved to its leftmost end, the empty material frame should not continue to be conveyed forward until the short-distance chain conveyor 215 on the left end moves down to a low position. Only then will the empty material frame located at the leftmost end of the lower chain conveyor 201 be transferred to the short-distance chain conveyor 215 of the left-side lifting conveyor 203.

[0050] Both ends of the horizontal rotating rod 208 are provided with sprockets 209, and each sprocket 209 is connected to a chain 210. Under the synchronous action of the two chains 210, the short-distance chain conveyor 215 can move stably up and down in a straight line.

[0051] The vertical mounting plate 211 has a connecting block 216 on its back, and the other end of the chain 210 is fixedly connected to the connecting block 216.

[0052] The vertical mounting plate 211 has two sliders 212 on the upper and lower left side of the back, and two sliders 212 on the upper and lower right side. All sliders 212 are slidably sleeved with the guide rod 213. This structure ensures the stability of the short-distance chain conveyor 215 in vertical linear movement.

[0053] Two guide rods 213 are provided, and the tops of the two guide rods 213 are fixedly connected together by a connecting plate 217 to form a relatively stable overall structure, thereby ensuring the stability of the short-distance chain conveyor 215 of the lifting conveyor 203 in vertical linear movement.

[0054] Both the lower chain conveyor 201 and the upper chain conveyor 202 are equipped with stop devices 218 at intervals along their length. The stop devices 218 on the upper chain conveyor 202 stop the material frame when it reaches the receiving station, facilitating material receiving. Simultaneously, material frames at other stations on the upper chain conveyor 202 also stop moving forward under the action of the stop devices 218 to prevent collisions. Furthermore, when there are material frames on the transfer device 204 or when the short-distance chain conveyor 215 on the right side is rising or falling, the stop devices 218 can prevent the material frames carrying workpieces from being transferred to the lifting conveyor 203 on the right side or falling outside the upper chain conveyor 202. A stop device 218 is installed on the lower chain conveyor 201, mainly to prevent the empty material frame located at the leftmost end of the lower chain conveyor 201 from continuing to move forward and falling outside the lower chain conveyor 201 during the ascent or descent of the short-distance chain conveyor 215 on the left side. When the empty material frame at the leftmost end of the lower chain conveyor 201 stops conveying, other stop devices 218 can be used to keep the empty material frames behind it in a stopped state, preventing them from continuing to be conveyed forward and accumulating together.

[0055] The stopping device 218 here and the limiting device 109 in the pallet conveying device 1 are the same device. The stopping device 218 (limiting device 109) is a commonly used component on the conveying device and can be any form of mature product, so its specific structure will not be described in detail here.

[0056] The upper chain conveyor 202 is equipped with one or more stop devices 218 at intervals along its length. When the stop devices 218 are set as a group, they are located at the loading station of the upper chain conveyor 202. A group of stop devices 218 consists of multiple stop devices 218 arranged sequentially at intervals. As shown in the attached drawings, the upper chain conveyor 202 has four stations, two of which are loading stations. Each non-loading station has one stop device 218, while the loading station has a group of stop devices 218. This allows the upper chain conveyor 202 to simultaneously transport four material frames. During the material frame receiving process, the stop devices 218 at all four stations activate simultaneously, blocking all four material frames to prevent them from colliding while moving forward. The reason for setting a group of stop devices 218 at the loading station is that the cleaned workpieces vary in size. For larger workpieces, after being placed into an empty material frame by the unloading device, the frame moves forward directly. For smaller workpieces, after being placed into the empty material frame by the unloading device, the foremost stop device 218 at the loading station moves downwards to improve the conveying efficiency of the material frame. This causes the material frame carrying the workpiece to move forward a certain distance to the second stop device 218 at the loading station, where it is blocked and stops moving forward. Then, the unloading device will place another cleaned workpiece into the material frame, thereby improving the conveying efficiency of the material frame. When loading multiple workpieces, the reason for moving the material frame forward a certain distance is to prevent subsequently placed workpieces from falling directly onto the previously placed workpieces, which could cause damage or cause the workpieces to fall out of the material frame. When the material frame at the receiving station is loaded with multiple workpieces, the material frames at other stations remain stationary.

[0057] When the material frame is full of workpieces at the first loading station, it will not stop moving to the second loading station.

[0058] The upper chain conveyor 202 is provided with at least one feeding station. A protective plate 219 is provided at the feeding station. The protective plate 219 is located between the conveyor chains on both sides of the upper chain conveyor 202 and in front of the stop device 218 at the feeding station. The bottom of the protective plate 219 is fixed to the push rod of the support cylinder, and the support cylinder is fixed to the frame of the upper chain conveyor 202. Since the laser-cleaned workpieces are gripped by the unloading device and then placed in the empty material frame of the upper chain conveyor 202, there is a certain height difference between the unloading device and the empty material frame during the placement process. This allows the grippers of the unloading device to open and allow the laser-cleaned workpieces to fall into the empty material frame. During the fall of the workpieces, there will be a certain impact force on the empty material frame. The empty material frame is supported on the conveyor chain of the upper chain conveyor 202. Under the impact force of the workpieces, the conveyor chain can easily be damaged. Therefore, a protective plate 219 is installed. When the empty material frame is conveyed to the loading station, the empty material frame stops moving forward under the action of the stop device 218. At this time, the empty material frame is directly above the protective plate 219. The support cylinder at the bottom of the protective plate 219 lifts the protective plate 219 and the empty material frame upwards to a certain height, so that the empty material frame is separated from the conveyor chain, thereby preventing the conveyor chain from being damaged under the impact force of the workpieces. After the workpiece falls into the empty material frame, the support cylinder drives the protective plate 219 and the material frame to move downwards, so that the material frame is supported on the conveyor chain.

[0059] The transfer device 204 is a lifting car, commonly known as an elevator car. A short-distance chain conveyor 215 is fixedly installed inside the lifting car. When the short-distance chain conveyor 215 of the transfer device 204 is at its lowest position, it is exactly at the same height as the upper chain conveyor 202. During the simultaneous transport of workpieces and material frames, the short-distance chain conveyor 215 on the lifting conveyor 203 at the right end of the upper chain conveyor 202 is at its highest position, at the same height as the upper chain conveyor 202 and the short-distance chain conveyor 215 of the transfer device 204. The upper chain conveyor 202, the short-distance chain conveyor 215 of the lifting conveyor 203, and the short-distance chain conveyor 215 of the transfer device 204 sequentially form a complete conveyor belt, so that the material frame loaded with workpieces can be transported from the upper chain conveyor 202 to the short-distance chain conveyor 215 of the lifting conveyor 203. During the conveying of the workpiece-loaded frame, the conveying directions of the upper chain conveyor 202, the short-distance chain conveyor 215 of the lifting conveyor 203, and the short-distance chain conveyor 215 of the transfer device 204 remain in the same direction. After the workpiece-loaded frame is transferred to the short-distance chain conveyor 215 of the transfer device 204, the lifting car moves upward, lifting the workpiece-loaded frame to the next process level. After the workers in the next process remove the workpiece, the lifting car moves downward with the empty frame. At this time, the short-distance chain conveyor 215 of the right-side lifting conveyor 203 is still at a high position and its operation stops. When the lifting car moves to a low position, the right-side lifting conveyor 203 and the short-distance chain conveyor 215 of the transfer device 204 both reverse direction. The empty material frame is transferred from the short-distance chain conveyor 215 of the transfer device 204 to the short-distance chain conveyor 215 of the right-side lifting conveyor 203. After the empty material frame is completely on the short-distance chain conveyor 215 of the right-side lifting conveyor 203, the right-side lifting conveyor 203 and the short-distance chain conveyor 215 of the transfer device 204 stop rotating. Then, the right-side lifting conveyor 203 drives its short-distance chain conveyor 215 down to a lower position, so that its short-distance chain conveyor 215 is flush with the lower chain conveyor 201.

Claims

1. An automated conveying device for a laser cleaning production line for complex curved valve outer walls, characterized in that: The pallet conveyor (1) extends longitudinally and a material frame conveyor (2) is arranged laterally at the tail end of the pallet conveyor (1), and the two are distributed in a T-shaped structure. The pallet conveyor (1) includes a pallet forward chain conveyor (101) and a pallet reverse chain conveyor (102) arranged side by side and of equal length. The pallet forward chain conveyor (101) has a pallet transverse conveyor (103) arranged laterally at both ends. The pallet transverse conveyor (103) includes a pallet short-distance conveyor (104) arranged at the top. The pallet short-distance conveyor (104) is fixed on a movable pallet (105) that can move laterally. The pallet reverse chain conveyor (102) is provided with a pallet forward chain conveyor (101) on each side; the pallet transverse conveyors (103) at the beginning and end each include two pallet short-distance conveyors (104), and each of the two pallet short-distance conveyors (104) is fixed on a mobile pallet (105). The material frame conveying device (2) includes a lower chain conveyor (201), an upper chain conveyor (202) of the same length is provided directly above the lower chain conveyor (201), and a lifting conveyor (203) is provided adjacent to each of the left and right ends of the two chain conveyors. A transfer device (204) is also provided adjacent to the right end of the right lifting conveyor (203).

2. The automated conveying device for a laser cleaning production line for complex curved valve surfaces according to claim 1, characterized in that: The pallet transverse conveyor (103) has a transverse linear module (106) and a transverse guide rod (107) mounted transversely on the top of its frame. The slide of the transverse linear module (106) is fixedly connected to the bottom of the moving pallet (105). A guide block (108) is also fixed to the bottom of the moving pallet (105). The guide block (108) is slidably sleeved on the transverse guide rod (107).

3. The automated conveying device for a laser cleaning production line for complex curved valve surfaces according to claim 1, characterized in that: The pallet forward chain conveyor (101) is provided with limit devices (109) at intervals; the pallet reverse chain conveyor (102) is provided with limit devices (109) at its tail end; the pallet forward chain conveyor (101) is also provided with a photoelectric switch mounting bracket (110) on the inner and outer frames at the top head end, and multiple photoelectric switches are provided on the photoelectric switch mounting bracket (110).

4. The automated conveying device for a laser cleaning production line for complex curved valve surfaces according to claim 1, characterized in that: The lifting conveyor (203) includes a mounting base (205), on which a lifting cylinder (206) is vertically mounted. The push rod end of the lifting cylinder (206) is connected to a mounting body (207). A horizontal rotating rod (208) is inserted into the mounting body (207). A sprocket (209) is provided on the horizontal rotating rod (208). The sprocket (209) is connected to a chain (210). One end of the chain (210) is fixed to... The mounting base (205) is fixedly connected to the vertical mounting plate (211) at one end. The vertical mounting plate (211) is provided with a slider (212), which is slidably sleeved on the guide rod (213). The guide rod (213) is vertically fixed on the mounting base (205). The vertical mounting plate (211) is also provided with a horizontally forward-extending support frame (214), and a short-distance chain conveyor (215) is provided on the support frame (214).

5. The automated conveying device for a laser cleaning production line for complex curved valve surfaces according to claim 4, characterized in that: Both ends of the horizontal rotating rod (208) are provided with sprockets (209); the back of the vertical mounting plate (211) is provided with a connecting block (216), and the other end of the chain (210) is fixedly connected to the connecting block (216).

6. The automated conveying device for a laser cleaning production line for complex curved valve outer walls according to claim 4, characterized in that: The vertical mounting plate (211) has two sliders (212) on the upper and lower sides of the left and right sides of the back; there are two guide rods (213), and the tops of the two guide rods (213) are fixedly connected together by a connecting plate (217).

7. The automated conveying device for a laser cleaning production line for complex curved valve surfaces according to claim 4, characterized in that: Stopping devices (218) are provided at intervals along the length of the lower chain conveyor (201) and the upper chain conveyor (202).

8. The automated conveying device for a laser cleaning production line for complex curved valve outer walls according to claim 4, characterized in that: The upper chain conveyor (202) is provided with one or a group of stop devices (218) at intervals along its length. When the stop devices (18) are set as a group, they are set at the loading station of the upper chain conveyor (202). A group of stop devices (218) consists of multiple stop devices (218) arranged in sequence at intervals.

9. The automated conveying device for a laser cleaning production line for complex curved valve outer walls according to claim 4, characterized in that: The upper chain conveyor (202) is provided with at least one feeding station, and a protective plate (219) is provided at the feeding station. The bottom of the protective plate (219) is fixed on the push rod of the support cylinder, and the support cylinder is fixed on the frame of the upper chain conveyor (202).

10. An automated conveying device for a laser cleaning production line for complex curved valve surfaces according to claim 4, characterized in that: The transfer device (204) is a lifting car, and a short-distance chain conveyor (215) is installed inside the lifting car.

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