Device for fly-patting and fly-cutting diaphragm by laser and method for cutting diaphragm by laser

Abstract

The invention discloses a device for flying and cutting a diaphragm by laser and a method for cutting the diaphragm by laser, a pole piece position detection table and a conveying assembly for conveying a material belt are sequentially arranged along the conveying direction of the material belt, and a vision assembly and a laser assembly are respectively arranged above the pole piece position detection table and the conveying assembly; the system further comprises a control system. The conveying assembly, the visual assembly and the laser assembly are connected with the control system. The conveying assembly adopts a negative pressure conveying belt for conveying; the visual assembly comprises a high-speed camera arranged above the pole piece position detection table, the high-speed camera is used for capturing image information of feature points on the diaphragm, and the control system analyzes the image information to obtain the position of the pole piece and then adjusts the motion trail of a laser galvanometer in the laser assembly in real time. Through cooperation of the visual assembly and the control system, the cutting position is adjusted in real time, and the cutting precision is high; and the diaphragm completes laser high-speed cutting in the conveying process, and the cutting quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pole piece processing, in particular to a device for laser flying-shooting and cutting a diaphragm and a laser cutting diaphragm method. Background Art

[0002] Laser cutting technology is an advanced manufacturing technology that is widely used in various industrial fields, including the cutting of battery cell separators. The battery cell separator is an important component of the battery, located between the positive and negative electrodes to prevent direct contact and cause short circuits, while also allowing electrolyte ions to pass through.

[0003] The principle of laser cutting technology is: a high-energy laser beam is irradiated on the surface of the material, causing the material to melt, vaporize or reach the ignition point quickly, and at the same time, a high-speed airflow coaxial with the laser beam assists in blowing away the melted or vaporized material to form an incision. Laser cutting has the characteristics of high precision, high speed and low thermal impact.

[0004] However, the existing technology for cutting the cell diaphragm has problems such as low cutting accuracy, the need to cut in a static state, too slow cutting speed, and offset cutting track.

[0005] In view of the technical problems existing in the prior art, the device and method for laser flying cutting of diaphragms of the present invention can adjust the cutting position of laser diaphragm cutting in real time to reduce cutting errors; the diaphragm can be cut at high speed during the diaphragm transmission process to ensure sufficient heat to cut through the diaphragm while there is no or little material melting, thereby improving the speed and quality of diaphragm cutting. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a device for laser flying cutting of a diaphragm and a method for laser cutting of a diaphragm.

[0007] The technical solution of the present invention is: a pole piece position detection platform and a conveying component for conveying the material belt are sequentially arranged along the conveying direction of the material belt, a visual component and a laser component are respectively arranged above the pole piece position detection platform and the conveying component, and also includes a control system; the conveying component, the visual component, and the laser component are respectively connected to the control system; the conveying component adopts a negative pressure conveyor belt for conveying; the visual component includes a high-speed camera arranged above the pole piece position detection platform, and the high-speed camera is used to capture the image information of the characteristic points on the diaphragm, and after the control system analyzes the image information to obtain the position of the pole piece, the galvanometer reflector of the laser galvanometer in the laser component is adjusted in real time.

[0008] Furthermore: the conveying assembly includes a pair of conveying rollers extending perpendicular to the conveying direction, a steel belt wound around the pair of conveying rollers, and a conveying drive member connected to the roller shafts of the conveying rollers, and the steel belt moves along the conveying direction under the drive of the conveying drive member.

[0009] Furthermore: there is a vacuum area between the steel belts wound on the conveying rollers, and the steel belts are provided with vacuum adsorption holes. The material belts are adsorbed on the surface of the steel belts through the vacuum adsorption holes and are conveyed along with the surface of the steel belts.

[0010] Further: the laser assembly includes a laser, and an optical path assembly is arranged along the emission optical path of the laser, and the optical path assembly includes a plurality of laser reflecting mirrors.

[0011] Further: the pole piece position detection platform adopts a light-transmitting plane.

[0012] Furthermore: the control system includes a data processing module and a control module, the data processing module stores the set diaphragm cutting trajectory graphics, laser galvanometer scanning speed, frequency, deflection angle and diaphragm transmission speed, as well as the laser power and laser pulse frequency during diaphragm cutting; the control module is used to generate corresponding control signals from the signals fed back by the data processing module, including drive control signals, speed control signals and laser control signals.

[0013] Further: the high-speed cameras are provided in multiple groups, and the multiple groups of high-speed cameras are arranged above the pole piece position detection platform perpendicular to the transmission direction.

[0014] Further: a method for laser cutting a diaphragm, comprising the following steps:

[0015] S1: Diaphragm cutting position detection; the visual component captures the image information of the feature points on the diaphragm and feeds it back to the control system.

[0016] S2: The control system performs data processing; the data processing module of the control system compares the received image information with the set data, calculates the position to be cut and the coordinate value of the laser beam processing trajectory emitted by the laser galvanometer, and generates corresponding control signals through the control module, including drive control signals, speed control signals and laser control signals.

[0017] S3: Laser cutting; the speed control signal controls the servo motor and the galvanometer drive mechanism to meet the conveying speed of the material strip during cutting and the corresponding cutting speed of the laser beam emitted by the laser galvanometer; the laser control signal controls the laser to emit the laser beam according to the set laser power and laser pulse frequency; the galvanometer drive mechanism converts the received drive control signal into mechanical vibration, so that the processing trajectory of the laser beam emitted by the laser galvanometer is corrected in real time to ensure that the laser beam cuts to the required position.

[0018] The beneficial technical effect of the present invention is: after the control system analyzes the image information captured by the high-speed camera to obtain the position of the pole piece, the galvanometer reflector of the laser galvanometer in the laser assembly is adjusted in real time to reduce the cutting position error of the diaphragm and improve the cutting accuracy; the control system controls the transmission assembly and the laser assembly to enable the diaphragm to complete laser high-speed cutting during the transmission process, ensuring sufficient heat to cut through the diaphragm while there is no or little material melting, thereby improving the speed and quality of cutting the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 is a schematic diagram of a transmission assembly of the present invention;

[0021] Figure 3 is a schematic diagram of a laser assembly of the present invention;

[0022] Among them: 1. Pole position detection platform; 2. Transmission component; 21. Conveyor roller; 22. Transmission drive; 23. Support plate; 3. Visual component; 31. High-speed camera; 4. Laser component; 41. Laser; 42. Vibration mirror unit; 43. Optical path component; 431. Laser reflector. DETAILED DESCRIPTION

[0023] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0024] like Figure 1 As shown, the present invention discloses a device for laser flying shooting and cutting of diaphragms, which is used for cutting diaphragms on a material strip after electrode sheet composite. A pole piece position detection platform 1 and a conveying component 2 for conveying the material strip are sequentially arranged along the conveying direction of the material strip, and a visual component 3 and a laser component 4 are respectively arranged above the pole piece position detection platform 1 and the conveying component 2; a control system is also included, and the conveying component 2, the visual component 3, and the laser component 4 are respectively electrically connected to the control system.

[0025] like Figure 2The conveying assembly 2 is arranged on a bracket and is conveyed by a negative pressure conveyor belt. This conveying method is stable and reliable, and also ensures the flatness of the material belt during the transmission process. The conveying assembly 2 includes a pair of conveying rollers 21 extending perpendicular to the conveying direction, a conveying driving member 22 connected to the roller shaft of the conveying roller 21, a steel belt wound around the pair of conveying rollers 21, and a support plate 23 for supporting the conveying rollers 21. The conveying assembly is connected to the bracket through the support plate 23. The support plate 23 is arranged along the conveying direction, and the two ends of each conveying roller 21 are rotatably connected to the support plate 23 through bearings.

[0026] There is a vacuum area between the wound steel belts, and the steel belts are provided with vacuum adsorption holes, through which the diaphragm is adsorbed on the steel belt surface and driven by the steel belt surface for transmission. Specifically, the conveying roller 21 rotates under the driving action of the transmission driving member 22 to drive the steel belt and the material belt to move along the transmission direction. In this embodiment, the conveying driving member 22 adopts a servo motor.

[0027] The steel belt surface below the laser assembly 4 is defined as the working table surface, such as Figure 3 As shown, the laser assembly 4 includes a laser 41, a galvanometer unit 42, and an optical path assembly 43 disposed between the laser 41 and the galvanometer unit 42. The laser 41 is used to emit a laser beam. The optical path assembly 43 is disposed on the emission optical path of the laser 41 and includes a plurality of laser reflectors 431. Through the reflection of the plurality of laser reflectors 431, the direction of the optical path can be changed more conveniently, saving space and facilitating debugging. The galvanometer unit 42 is provided with a laser galvanometer. The laser galvanometer includes a galvanometer drive mechanism and a galvanometer reflector driven and controlled by the galvanometer drive mechanism. The galvanometer drive mechanism is used to convert the control signal generated by the control system into mechanical vibration and transmit it to the galvanometer reflector. The laser galvanometer receives and focuses the laser beam after multi-path reflection. After the high-precision drive control of the galvanometer drive mechanism, the deflection and scanning path of the laser beam can be accurately controlled, so that the laser beam can be quickly moved to the desired processing position and the laser cutting of the diaphragm can be completed.

[0028] The visual component 3 performs real-time detection of the pole piece position of the material strip on the pole piece position detection table 1 to achieve accurate positioning of the pole piece, including high-speed cameras 31 respectively arranged above both sides of the material strip. The high-speed camera 31 is used to capture image information of feature points on the diaphragm. After the control system analyzes the image information to obtain the position of the pole piece, it adjusts the emission trajectory of the laser beam to prevent the cutting trajectory from deviating.

[0029] In this embodiment, the pole piece position detection platform 1 adopts a light-transmitting plane, which can ensure that light can be evenly irradiated onto the material strip, so that the high-speed camera 31 can capture a clearer image. This is very important for accurately analyzing the position and shape of the pole piece.

[0030] Specifically, the servo motor, laser 41, galvanometer drive mechanism, and high-speed camera 31 are electrically connected to the control system respectively. The control system includes a data processing module and a control module. The data processing module stores the set diaphragm cutting trajectory graph, laser galvanometer scanning speed, frequency, deflection angle, and diaphragm transmission speed, as well as the laser power and laser pulse frequency during diaphragm cutting. The data processing module compares the image information captured by the high-speed camera with the set data to calculate the position to be cut and the coordinate value of the laser beam processing trajectory emitted by the laser galvanometer. The control module is used to generate a variety of control signals from the signal fed back by the data processing module, including a drive control signal, a speed control signal, and a laser control signal.

[0031] The galvanometer drive mechanism converts the received drive control signal into mechanical vibration, and corrects the motion trajectory of the galvanometer reflector in real time through the calculated laser beam processing trajectory coordinate value, and achieves high-precision processing by accurately controlling the deflection and scanning path of the laser beam; the speed control signal controls the servo motor and the galvanometer drive mechanism to meet the conveying speed of the material strip during cutting and the corresponding laser beam cutting speed emitted by the laser galvanometer; the laser control signal controls the laser to emit the laser beam according to the set laser power and laser pulse frequency.

[0032] The device for laser flying cutting of a diaphragm according to the present invention is used to implement a method for laser processing, and the steps include:

[0033] S1: Diaphragm cutting position detection; the material strip is rolled onto the pole piece position detection station 1, and the image information of the characteristic points on the diaphragm is captured by the visual component 3 and fed back to the control system.

[0034] S2: The control system performs data processing; the data processing module of the control system compares the received image information with the set data, calculates the position to be cut and the coordinate value of the laser beam processing trajectory emitted by the laser galvanometer, and generates corresponding control signals through the control module, including drive control signals, speed control signals and laser control signals.

[0035] S3: Laser cutting; the material strip is conveyed to the work surface, and the galvanometer drive mechanism performs actual motion control on the received drive control signal, i.e. converts the drive control signal into mechanical vibration, so that the processing trajectory of the laser beam emitted by the laser galvanometer is corrected in real time, ensuring that the laser beam cuts to the required position; the speed control signal controls the servo motor and the galvanometer drive mechanism to meet the conveying speed of the material strip during cutting and the corresponding cutting speed of the laser beam emitted by the laser galvanometer; the laser control signal controls the laser to emit the laser beam according to the set laser power and laser pulse frequency, so as to ensure that the diaphragm is cut in a continuous transmission state, and ensure that the laser beam has enough heat to cut through the diaphragm, while making the diaphragm not melted or less melted, thereby improving the speed and quality of diaphragm laser cutting.

[0036] During the cutting process, the data processing module captures the image information of the characteristic points on the diaphragm through a high-speed camera, calculates the position to be cut, and calculates the processing trajectory of the laser beam. The data processing module transmits the calculated coordinate values ​​of the laser beam processing trajectory to the control module at high speed. The control module sends a drive control signal, and the galvanometer drive mechanism converts the received drive control signal into mechanical vibration to achieve real-time correction of the motion trajectory of the galvanometer reflector, so that the laser beam emitted by the laser galvanometer during the cutting process always cuts to the position to be cut, and completes a single diaphragm fly cutting under the high-speed movement of the laser beam. This diaphragm fly cutting process is repeated at high speed to complete the laser fly cutting action of the diaphragm.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A device for laser flying cutting of diaphragms, characterized in that: A pole piece position detection platform (1) and a conveying assembly (2) for conveying the material belt are sequentially arranged along the conveying direction of the material belt, and a visual assembly (3) and a laser assembly (4) are respectively arranged above the pole piece position detection platform (1) and the conveying assembly (2), and also include a control system; the conveying assembly (2), the visual assembly (3), and the laser assembly (4) are respectively connected to the control system; the conveying assembly (2) adopts a negative pressure conveyor belt for conveying; the visual assembly (3) includes a high-speed camera (31) arranged above the pole piece position detection platform (1), and the high-speed camera (31) is used to capture image information of feature points on the diaphragm, and after the control system analyzes the image information to obtain the position of the pole piece, the galvanometer reflector of the laser galvanometer in the laser assembly (4) is adjusted in real time.

2. The device for laser flying cutting of diaphragm according to claim 1, characterized in that: The conveying assembly (2) comprises a pair of conveying rollers (21) extending perpendicularly to the conveying direction, a steel belt wound around the pair of conveying rollers (21), and a conveying drive member (22) drivingly connected to the roller shafts of the conveying rollers (21); the steel belt moves along the conveying direction under the drive of the conveying drive member (22).

3. The device for laser flying cutting of diaphragm according to claim 2, characterized in that: The steel belts wound around the conveying roller (21) form a vacuum area, and the steel belts are provided with vacuum adsorption holes. The material belts are adsorbed on the surface of the steel belts through the vacuum adsorption holes and are transported along with the surface of the steel belts.

4. The device for laser flying cutting of diaphragm according to claim 1, characterized in that: The laser assembly (4) comprises a laser (41), and an optical path assembly (43) is arranged along the emission optical path of the laser (41), wherein the optical path assembly (43) comprises a plurality of laser reflection mirrors (431).

5. The device for laser flying cutting of diaphragm according to claim 1, characterized in that: The pole piece position detection platform (1) adopts a light-transmitting plane.

6. The device for laser flying cutting of diaphragm according to claim 1, characterized in that: The control system includes a data processing module and a control module. The data processing module stores the set diaphragm cutting trajectory graphics, laser galvanometer scanning speed, frequency, deflection angle and diaphragm transmission speed, as well as the laser power and laser pulse frequency during diaphragm cutting; the control module is used to generate corresponding control signals from the signals fed back by the data processing module, including drive control signals, speed control signals and laser control signals.

7. The device for laser flying cutting of diaphragm according to claim 1, characterized in that: The high-speed cameras (31) are provided in multiple groups, and the multiple groups of high-speed cameras (31) are arranged above the pole piece position detection platform (1) perpendicular to the transmission direction.

8. A method for cutting a diaphragm by laser, using the device for cutting a diaphragm by laser flying shot as claimed in any one of claims 1 to 7, characterized in that: The steps include: S1: Diaphragm cutting position detection; the visual component (3) captures the image information of the feature points on the diaphragm and feeds it back to the control system. S2: The control system performs data processing; the data processing module of the control system compares the received image information with the set data, calculates the position to be cut and the coordinate value of the laser beam processing trajectory emitted by the laser galvanometer, and generates corresponding control signals through the control module, including drive control signals, speed control signals and laser control signals. S3: Laser cutting; the speed control signal controls the servo motor and the galvanometer drive mechanism to meet the conveying speed of the material strip during cutting and the corresponding cutting speed of the laser beam emitted by the laser galvanometer; the laser control signal controls the laser to emit the laser beam according to the set laser power and laser pulse frequency; the galvanometer drive mechanism converts the received drive control signal into mechanical vibration, so that the processing trajectory of the laser beam emitted by the laser galvanometer is corrected in real time to ensure that the laser beam cuts to the required position.

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