Coating method of lithium battery pole piece
Technical Field
The invention relates to a coating method of a lithium battery pole piece.
Background
The dark marks are caused by uneven thickness of the surface part of the pole piece during coating, and color difference appears to show that the appearance is dark marks. The main reason for the uneven thickness is caused by the adhesion of foreign matter to the edge of the blade during the scraping process. At present, when dark marks are found, a scraper needs to be manually replaced and cleaned under the condition of shutdown, and the working efficiency is affected.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a coating method of a lithium battery pole piece for removing coating dark marks during coating.
In order to solve the technical problem, the coating method adopts a lithium battery pole piece coating machine, the lithium battery pole piece coating machine comprises a coating device, a conveying device and a rack, the coating device and the conveying device are arranged on the rack, the conveying device comprises a first conveying roller, a second conveying roller and a conveying belt sleeved on the first conveying roller and the second conveying roller, the first conveying roller is connected with a conveying driving motor, the coating device comprises a coating frame, a bin, an injection device, an adjustable scraper, a camera, a PLC (programmable logic controller) and an upper computer, the injection device, the adjustable scraper and the camera are sequentially arranged from front to back, the injection device is connected with the bin, the adjustable scraper comprises a rotating shaft, a support plate, a support beam, two support seats and a tool changing motor, the two support seats are respectively fixed on the rack and positioned on two sides of the conveying belt, the two ends of the rotating shaft are respectively and rotatably arranged on the two supports, one end of the rotating shaft is connected with a main shaft of a tool changing motor, the tool changing motor is arranged on the adjacent supports, two sides of the rotating shaft are respectively provided with one supporting beam, two ends of each supporting beam are respectively fixed on the two supports, one side of the support plate is fixed on the rotating shaft, two side surfaces of the support plate are respectively provided with a T-shaped groove, a scraper is inserted in each T-shaped groove, the section of the part of the scraper, which is positioned in the T-shaped groove, is T-shaped, and when the support plate is overturned to lean against any one supporting beam, one of the two; the conveying driving motor, the injection device and the tool changing motor are all connected with a PLC (programmable logic controller), the PLC and the camera are connected with an upper computer, and the camera faces the conveying belt; the coating method comprises the following steps: (1) laying a base material of the lithium battery pole piece on a conveying belt, and adjusting a scraper to be vertical downwards; (2) starting a conveying motor to enable a conveying belt to drive a base material to move forwards and backwards, starting a spraying device to spray, spraying slurry on the base material and scraping the slurry by a scraper, and starting a camera 4-5 seconds after starting the spraying device; (3) the camera will shoot through the substrate picture of coating and send the host computer to, and the host computer is handled the picture, and when the host computer found the dark trace, the host computer triggered the PLC controller and carries out following control: and controlling the conveying motor to rotate reversely for a certain time and rotate forwards again, starting the cutter changing motor until the support plate is turned over and leans against the other support beam, turning over the scraper vertically downwards to start working, manually taking down the scraper turned over vertically upwards and replacing a new scraper in the sliding groove on the top surface of the support plate.
In order to improve the safety, one end of the T-shaped groove is blocked, and the other end of the T-shaped groove is provided with a lock structure for preventing the scraping knife from slipping.
For the convenience of tool changing, the locking structure include locking plate and lockpin, locking plate one end is passed through the loose-leaf with the support plate and is connected, is provided with the lockpin hole on the other end of locking plate, and the lockpin is fixed on the support plate, and lockpin and loose-leaf are located the both sides in T groove respectively, and the lockpin includes stand and activity bolt, and the middle part of activity bolt is rotated with the upper end of stand and is connected, and the lower extreme of stand is fixed on the support plate, and the activity bolt is the cuboid, and the lockpin hole is the rectangular hole that the activity bolt can pass through, and the.
The invention has the beneficial effects that: the invention adopts the camera to monitor the dark marks, adopts the adjustable scraper, controls the replacement of the scraper through the monitoring result of the camera, has high cutter changing speed, only needs the turnover of the rotating shaft, can take down the old scraper to supplement the new scraper when the new scraper works, does not influence the work of a machine, does not need to stop to replace the scraper, only needs to invert the base material to spray again when the dark marks are removed, has high working efficiency and good effect of removing the dark marks.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the structure of the part 8 of FIG. 1;
FIG. 3 is a schematic top view of FIG. 2;
FIG. 4 is an enlarged view of the lock structure;
FIG. 5 is an enlarged view of the latch;
in the figure: 1. the automatic coating machine comprises a rack, 2, a first conveying roller, 3, a conveying belt, 4, a coating frame, 5, an upper computer, 6, a PLC (programmable logic controller), 7, a camera, 8, an adjustable scraper, 9, a bin, 10, an injection device, 11, a second conveying roller, 12, a base material, 8-1, a scraper, 8-2, a support plate, 8-3, a support, 8-4, a support beam, 8-5, a rotating shaft, 8-6, a tool changing motor, 8-7, a locking structure, 8-8, a hinge, 8-9, a locking plate, 8-10, a locking pin hole, 8-11, a movable bolt, 8-12 and a stand column.
Detailed Description
As shown in fig. 1 a lithium battery pole piece coating machine, including coating unit, conveyor and frame 1, coating unit and conveyor set up in frame 1, conveyor includes first conveying roller 2, second conveying roller 11 and the conveyer belt 3 of cover on first conveying roller 2 and second conveying roller 11, first conveying roller 2 is connected with carries driving motor, coating unit includes coating frame 4 and the feed bin 9 of setting on coating frame, injection apparatus 10, adjustable scraper 8, camera 7, PLC controller 6 and host computer 5, injection apparatus 10, adjustable scraper 8 and camera 7 are arranged from the past backward in proper order, injection apparatus 10 connects feed bin 9.
As shown in fig. 2 and fig. 3, the adjustable scraper 8 comprises two rotating shafts 8-5, a support plate 8-2, two support beams 8-4, two supports 8-3 and a tool-changing motor 8-6, wherein the two supports 8-3 are respectively fixed on the frame 1 and located at two sides of the conveyor belt 3, two ends of the rotating shaft 8-5 are respectively rotatably arranged on the two supports 8-3, one end of the rotating shaft 8-5 is connected with a main shaft of the tool-changing motor 8-6, the tool-changing motor 8-6 is arranged on the adjacent support 8-3, two sides of the rotating shaft 8-5 are respectively provided with one support beam 8-4, two ends of each support beam 8-4 are respectively fixed on the two supports 8-3, one side edge of the support plate 8-2 is fixed on the rotating shaft 8-5, two side surfaces of the support plate are respectively provided with a T-shaped groove, a scraper 8-1 is inserted in each T-shaped groove, the section of the part of the scraper 8-1 positioned in the T-shaped groove is T-shaped, one end of the T-shaped groove is blocked, and the other end of the T-shaped groove is provided with a lock structure 8-7 for preventing the scraper from slipping. When the carrier plate 8-2 is turned over against any one of the support beams 8-4, the two scrapers on the carrier plate 8-2 are directed one vertically upwards and one vertically downwards.
As shown in figures 4 and 5, the lock structure comprises locking plates 8-9 and locking pins, one end of each locking plate 8-9 is connected with the carrier plate 8-2 through a hinge 8-8, the other end of each locking plate 8-9 is provided with a locking pin hole 8-10, the locking pins are fixed on the carrier plate 8-2, the locking pins and the hinges 8-8 are respectively positioned on two sides of the T-shaped groove, each locking pin comprises an upright post 8-12 and a movable bolt 8-11, the middle part of each movable bolt 8-11 is rotatably connected with the upper end of the upright post 8-12, the lower end of each upright post 8-12 is fixed on the carrier plate 8-2, each movable bolt 8-11 is cuboid, each locking pin hole 8-10 is a long hole through which the movable bolt 8-11 can pass, and each movable bolt 8-11 can rotate to cross the.
The conveying driving motor, the injection device 10 and the tool changing motors 8-6 are all connected with the PLC 6, the PLC 6 and the camera 7 are connected with the upper computer 5, and the camera 7 faces the conveying belt 3.
The coating method of the lithium battery pole piece by adopting the coating machine comprises the following steps:
(1) laying the base material 12 of the lithium battery pole piece on the conveyer belt 3, and vertically downwards facing a scraper 8-1 (in a state shown in figures 1 and 2);
(2) starting a conveying motor to enable the conveying belt 3 to drive the base material 12 to move forwards and backwards, starting the spraying device 10 to spray, spraying the slurry on the base material 12 and leveling the slurry by the scraper 8-1, and starting the camera 7 after starting the spraying device for 4-5 seconds; (3) the camera 7 will shoot the substrate picture through the coating and send to host computer 5, and host computer 5 handles the picture, and when host computer 5 found the dark mark, host computer 5 triggered PLC controller 6 and carries out following control: and controlling the conveying motor to rotate reversely for a certain time and rotate forwards again, starting the tool changing motor 8-6 until the support plate 8-2 turns over and leans against the other supporting beam 8-4, turning over the scraper 8-1 which is vertically downward to start working, manually taking down the scraper 8-1 which is turned over to be vertically upward, and replacing a new scraper 8-1 in the sliding groove on the top surface of the support plate 8-2. The conveying motor reversely rotates to pull back the substrate with the dark marks for recoating, and the tool changing motor 8-6 drives the unused scraper to be changed to a working position when the substrate is being retreated. The scraper with the scratch is replaced and overhauled, a new standby scraper is supplemented at the same time, and the normal work of the working scraper is not influenced when the scraper is replaced.