Coaxial coated metal wire online defective product screening and marking device and method

Abstract

The invention provides a coaxial coated metal wire online defective product screening and marking device and method, and the device comprises a coaxial coating assembly which is used for coaxially coating the surface of a fine metal wire with battery slurry; the visual detection assembly is used for positioning the coating position of the fine metal wire and detecting whether the size of the coated fine metal wire is qualified or not; and the marking and screening assembly is used for coating marking slurry on the surfaces of the fine metal wires and marking defective products when the visual detection assembly detects that the sizes of the coated fine metal wires are unqualified. According to the automatic marking device, automatic marking of defective products coated on the surfaces of coaxial coated fine metal wires can be achieved, the screening accuracy of the defective products can be greatly improved through a high-precision visual detection system, and the screening efficiency of the defective products coated with the fine metal wires is improved through the marking and screening assembly.

Description

Technical Field

[0001] The invention relates to the technical field of coating equipment, and in particular to an on-line defective product screening and marking device and method for coaxial coated metal wires. Background Art

[0002] With the rapid development of the battery field, microelectrodes have unique advantages and importance in electrochemical testing due to their small size and some properties that conventional electrodes cannot match, such as high current density, fast response speed, and high signal-to-noise ratio, and have been widely used in analytical chemistry, biology, and medicine. At present, microelectrodes can be prepared by coaxially coating the surface of thin metal wires with battery slurry, but in the process of preparing microelectrodes, it is often necessary to manually screen defective products, which is inefficient and prone to missed screening, posing a hidden danger to the subsequent safe application of microelectrodes.

[0003] The Chinese patent document discloses "a laser marking device for micro-texturing the surface of ultra-fine metal wires", and its publication number is CN 115609156A. The marking device of this invention includes a frame, a material transmission mechanism, a laser marking platform, a material receiving mechanism, and a laser three-axis control device; the frame includes a material transmission mechanism, a central frame cabinet, a material receiving mechanism frame, and a laser three-axis control device frame. The application of this patented technical solution can improve the wear resistance of metal wires and meet the high demand of industrialization, thereby improving the efficiency of metal wire micro-texturing marking. However, this patent is suitable for the forming process of metal wire micro-textures, and cannot distinguish defective products, and cannot realize online defective product screening and marking. Summary of the invention

[0004] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a coaxial coated metal wire online defective product screening and marking device and method, which is used to solve the problem that the existing microelectrode preparation process often requires manual screening of defective products, which is inefficient and prone to missed screening, resulting in safety hazards in the application of microelectrodes.

[0005] In order to achieve the above-mentioned and other related purposes, the present invention provides a coaxial coated metal wire online defective product screening and marking device, comprising: A coaxial coating assembly for coaxially coating the battery slurry on the surface of the thin metal wire; A visual inspection component, used to locate the coating position of the thin metal wire and to detect whether the size of the coated thin metal wire is qualified; The marking screening component is used to apply marking slurry on the surface of the thin metal wire to mark defective products when the visual inspection component detects that the size of the coated thin metal wire is unqualified.

[0006] The coaxial coated metal wire online defective product screening and marking device of the present application can realize the automatic marking of defective products on the surface of the coaxial coated fine metal wire. Through the high-precision visual inspection system, the screening accuracy of defective products can be greatly improved. The marking screening component is used to increase the screening efficiency of defective coated fine metal wires, which effectively solves the problem that the existing microelectrode preparation process often requires manual screening of defective products, which is inefficient and prone to missed screening, resulting in safety hazards in the application of microelectrodes.

[0007] Preferably, the surface of the fine metal wire has paint removal sections and non-paint removal sections distributed at intervals, and the coaxial coating component is used to coaxially coat the battery slurry on the paint removal sections on the surface of the fine metal wire in sequence, and the coating sections are formed after the battery slurry is coated on the surface of the paint removal sections; the marking screening component is used to coat the non-paint removal sections of the fine metal wire close to the coating section with marking slurry to form marking points for marking defective products when the visual inspection component detects that the size of the coating section of the fine metal wire is unqualified.

[0008] Preferably, the coaxial coated metal wire online defective product screening and marking device further comprises: An unwinding mechanism for unwinding the thin metal wire before coaxial coating of the battery slurry; The winding mechanism is used to wind up the thin metal wire after being coaxially coated with battery slurry.

[0009] Preferably, the winding mechanism further comprises a winding positioning assembly, and the winding positioning assembly is used for positioning the thin metal wire during the winding process.

[0010] Preferably, the coaxial coated metal wire online defective product screening and marking device further comprises a glue dispensing mechanism, and the glue dispensing mechanism is used to control the feeding and cutting of the battery slurry in the coaxial coating component and the marking slurry in the marking screening component.

[0011] Preferably, the coaxial coating assembly includes a coating cylinder, a feeding adapter block and a printing needle assembly for realizing battery slurry feeding, the coating cylinder is connected to the dispensing mechanism, the printing needle assembly is embedded in the feeding adapter block, and a penetrating feeding channel is provided in the feeding adapter block, one end of the feeding channel is connected to the discharge port of the coating cylinder, and the other end is connected to the feed port of the printing needle assembly; the winding and positioning assembly is arranged below the printing needle assembly, and can approach or move away from the thin metal wire in the horizontal direction.

[0012] Preferably, a wire guide assembly is provided above the printing needle assembly, and the wire guide assembly includes a needle clamp seat, a wire guide needle fixed in the needle clamp seat, and a needle protection block arranged outside the wire guide needle, and a wire guide hole coaxial with the printing needle assembly is provided in the wire guide needle.

[0013] Preferably, the printing needle assembly includes a ceramic needle and a metal needle tip arranged in the feed adapter block, the ceramic needle is used to pass through the thin metal wire; the metal needle tip is coaxially sleeved on the outside of the ceramic needle, a printing channel is formed between the metal needle tip and the ceramic needle, and the printing channel is connected to the feed channel.

[0014] Preferably, the winding positioning assembly includes a winding positioning block arranged below the printing needle assembly, a first driving member for driving the winding positioning block to approach or move away from the thin metal wire, and a first proximity switch for detecting the position of the winding positioning block, wherein the winding positioning block is provided with a first adjustment slide, and the first adjustment slide is used to adjust the position of the winding positioning block; the first driving member is provided with a first limit block, and the first limit block is used to limit the retracted position of the first driving member. The first proximity switch is used to detect the approach of the winding positioning block and send out a corresponding electrical signal to control the switching action of the circuit. The first proximity switch does not need to make direct mechanical contact with the winding positioning block, and triggers the switching action by sensing the approach of the winding positioning block. It has the characteristics of reliable action, stable performance, fast frequency response, long application life, and strong anti-interference ability.

[0015] Preferably, a first V-shaped positioning groove is provided at one end of the winding positioning block close to the thin metal wire, and a second thin metal wire fitting surface is formed in the first V-shaped positioning groove.

[0016] Preferably, the marking screening assembly includes a marking material barrel for realizing the feeding of marking slurry and a marking positioning block connected to the marking material barrel, the marking material barrel is connected to the dispensing mechanism, a marking slurry discharge channel is provided through the marking positioning block, the marking positioning block is arranged below the printing needle assembly and can approach or move away from the thin metal wire along a transmission direction perpendicular to the thin metal wire; one end of the marking slurry discharge channel is connected to the discharge port of the marking material barrel, and the other end contacts the thin metal wire during marking.

[0017] Preferably, the end of the marking positioning block close to the thin metal wire is provided with a second V-shaped positioning groove, and a thin metal wire fitting surface is formed in the second V-shaped positioning groove; the end of the marking slurry discharge flow channel that contacts the thin metal wire during marking is arranged at the center of the second V-shaped positioning groove. The V-shaped positioning groove design can well limit the thin metal wire.

[0018] Preferably, a flexible feed pipe and a feed joint are provided between the marking barrel and the marking positioning block, a marking slurry feed channel connected to the marking slurry discharge channel is also provided in the marking positioning block, and the discharge port of the marking barrel is connected in sequence through the flexible feed pipe, the feed joint and the marking slurry feed channel. The flexible feed pipe can ensure the stability of the marking slurry feeding during the movement of the marking positioning block and improve the marking efficiency.

[0019] Preferably, the marking screening assembly further includes a second driving member for driving the marking positioning block to approach or move away from the thin metal wire and a second proximity switch for detecting the position of the marking positioning block, the marking positioning block is provided with a second adjustment slide, the second adjustment slide is used to adjust the position of the marking positioning block; the second driving member is provided with a second limit block, the second limit block is used to limit the retracted position of the second driving member. The second proximity switch is used to detect the approach of the marking positioning block and send out a corresponding electrical signal to control the switching action of the circuit. The second proximity switch does not need to make direct mechanical contact with the marking positioning block, and triggers the switch action by sensing the approach of the marking positioning block. It has the characteristics of reliable action, stable performance, fast frequency response, long application life, and strong anti-interference ability.

[0020] Preferably, the coaxial coated metal wire online defective product screening and marking device further comprises a driving mechanism, and the driving mechanism is used to drive the coaxial coated metal wire online defective product screening and marking device to move relative to the axial direction of the thin metal wire.

[0021] The present invention also provides a method for online defective screening and marking of coaxial coated metal wires, which uses the above-mentioned coaxial coated metal wire online defective screening and marking device, and comprises the following steps: (1) Coaxially coating the battery slurry on the surface of the thin metal wire using a coaxial coating assembly; (2) Using a visual inspection component to locate the coating position of the thin metal wire and to detect whether the size of the coated thin metal wire is qualified; (3) When the visual inspection component detects that the size of the coated thin metal wire is unqualified, the marking screening component is used to apply marking slurry on the surface of the thin metal wire to mark defective products; when the visual inspection component detects that the size of the coated thin metal wire is qualified, steps (1) and (2) are repeated.

[0022] Preferably, the surface of the thin metal wire has paint removal sections and non-paint removal sections that are spaced apart. In step (1), the battery slurry is coaxially coated on the surface of the thin metal wire by sequentially coaxially coating the battery slurry on the paint removal sections on the surface of the thin metal wire, and the coating sections are formed after the battery slurry is coated on the surfaces of the paint removal sections. In step (3), the marking slurry is coated on the surface of the thin metal wire by coating the marking slurry on the non-paint removal sections of the thin metal wire close to the coating sections to form marking points.

[0023] Preferably, the coaxial coated metal wire online defective product screening and marking device further comprises an unwinding mechanism and a rewinding mechanism; the coaxial coated metal wire online defective product screening and marking method further comprises: An unwinding mechanism is used to unwind the thin metal wire before coaxial coating of the battery slurry; A winding mechanism is used to wind up the thin metal wire after coaxially coating the battery slurry.

[0024] Preferably, the winding mechanism further includes a winding positioning component; the coaxial coated metal wire online defective product screening and marking method further includes: During the winding process of the thin metal wire, a winding positioning component is used to position the thin metal wire.

[0025] As described above, the present invention has the following beneficial effects: (1) It can realize automatic marking of defective products on the surface of coaxial coated fine metal wire. Through the high-precision visual inspection system, the screening accuracy of defective products can be greatly improved. The marking screening component is used to increase the screening efficiency of defective coated fine metal wire; (2) The combination of the retractable and controlled winding positioning block, the marking positioning block and the proximity switch does not require direct mechanical contact with the object. The proximity switch triggers the switch action by sensing the proximity of the object. It has the characteristics of reliable action, stable performance, fast frequency response, long application life and strong anti-interference ability. (3) The V-shaped positioning groove design of the winding positioning block and the marking positioning block can effectively limit the fine metal wire and ensure the accuracy of coating and marking. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shown is a schematic structural diagram of a coaxial coated metal wire online defective product screening and marking device.

[0027] Figure 2 Display as Figure 1 Side view of .

[0028] Figure 3 Display as Figure 2 Enlarged view of point A in the middle.

[0029] Figure 4 It shows the assembly structure schematic diagram of the coaxial coating component, winding positioning component and marking screening component.

[0030] Figure 5 Display as Figure 4 Top view of the .

[0031] Figure 6 Display as Figure 5 Local cross-sectional view along the AA direction.

[0032] Figure 7 Shown is a schematic diagram of the structure of the coaxial coating assembly.

[0033] Figure 8 Shown is a schematic diagram of the structure of the winding positioning component.

[0034] Fig. 9 Shown is a schematic diagram of the structure of the marking screening component.

[0035] Fig.10 Shown is a schematic diagram of the structure of the marking positioning block.

[0036] Fig.11 Display as Fig.10 Top view of the .

[0037] Fig.12 Display as Fig.11 Cross-sectional view along the BB direction.

[0038] Fig.13 Schematic diagram showing the initial state structure of a thin metal wire.

[0039] Fig.14 Shown is a schematic diagram of the defective product marking structure after the thin metal wire is coated with battery slurry.

[0040] Description of the accompanying drawings: coaxial coating component 1, first fixed plate 10, type mounting plate 11, coating barrel 12, feed adapter block 13, feed flow channel 131, ceramic needle 132, metal needle tip 133, printing flow channel 134, clamp needle seat 14, wire guide needle 141, needle protection block 142, thin metal wire 2, paint removal section 21, non-paint removal section 22, marking point 221, coating section 211, visual inspection component 3, marking screening component 4, second fixed plate 40, marking barrel 41, flexible feed pipe 411, feed connector 412, feed connector 413, discharge connector 414, feed block 415, marking positioning block 42, marking positioning block adapter plate 420, marking The marking slurry discharge channel 421, the second V-shaped positioning groove 422, the second adjusting slide 423, the marking slurry feeding channel 424, the second driving member 43, the second limit block 431, the second driving member mounting plate 432, the second proximity switch 44, the second proximity switch mounting plate 441, the unwinding mechanism 5, the winding mechanism 6, the winding positioning assembly 7, the third fixed plate 70, the winding positioning block 71, the first adjusting slide 711, the first V-shaped positioning groove 712, the winding positioning block adapter plate 713, the first driving member 72, the first limit block 721, the first driving member mounting plate 722, the first proximity switch 73, the first proximity switch mounting plate 731, the dispensing mechanism 8, and the driving mechanism 9. DETAILED DESCRIPTION

[0041] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0043] Unless otherwise clearly specified and limited, the terms "connection", "fixation" and "setting" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] like Figure 1 , Figure 2 and Figure 3 As shown, the embodiment of the present application provides a coaxial coated metal wire online defective product screening and marking device, comprising: a coaxial coating component 1, used for coaxially coating the battery slurry on the surface of the thin metal wire 2; Fig.13 As shown, the surface of the thin metal wire has paint removal sections 21 and non-paint removal sections 22 distributed at intervals, and the coaxial coating of battery slurry on the surface of the thin metal wire 2 is to coaxially coat the battery slurry on the paint removal sections on the surface of the thin metal wire in sequence, and the coating section 211 is formed after the surface of the paint removal section is coated with battery slurry.

[0045] The visual inspection component 3 is used to locate the coating position of the thin metal wire and detect whether the size of the coated thin metal wire is qualified; the visual inspection component can adopt existing commercially available visual inspection equipment. This application does not involve structural improvements of the visual inspection component and will not be repeated here.

[0046] The marking screening component 4 is used to apply marking slurry on the surface of the thin metal wire when the visual inspection component detects that the size of the coated thin metal wire is unqualified, such as Fig.14 As shown, the marking slurry is applied to the non-paint-stripping section of the thin metal wire close to the coating section to form a marking point 221, and defective products are marked.

[0047] The unwinding mechanism 5 is used to unwind the thin metal wire before coaxially coating the battery slurry; the unwinding mechanism adopts the existing conventional unwinding wheel and other devices. This application does not involve the structural improvement of the unwinding mechanism, which will not be repeated here.

[0048] The winding mechanism 6 includes a winding positioning assembly 7, which is used for positioning the thin metal wire during winding. The winding mechanism is used to wind the thin metal wire after the battery slurry is coaxially coated. The winding mechanism adopts the existing conventional winding wheel and other devices. This application does not involve the structural improvement of the winding mechanism, which will not be repeated here.

[0049] The dispensing mechanism 8 is used to control the feeding and cutting of the battery slurry in the coaxial coating component and the marking slurry in the marking screening component.

[0050] The driving mechanism 9 is used to drive the coaxial coated metal wire online defective product screening and marking device to move relative to the axial direction of the thin metal wire; the driving mechanism adopts an existing conventional driving device, such as a lifting cylinder. This application does not involve structural improvements to the driving mechanism and will not be repeated here.

[0051] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the coaxial coated metal wire online defective product screening and marking device is provided with a type mounting plate 11, and the coaxial coating assembly includes a first fixed plate 10 mounted on the type mounting plate, a coating barrel 12 for realizing battery slurry feeding, a feeding adapter block 13 and a printing needle assembly arranged on the first fixed plate, the coating barrel is connected to the dispensing mechanism, and the printing needle assembly is embedded in the feeding adapter block, as shown in FIG. Figure 6 As shown, a feed channel 131 is provided in the feed adapter block, one end of which is connected to the discharge port of the coating barrel, and the other end is connected to the feed port of the printing needle assembly; the winding and positioning assembly is arranged below the printing needle assembly, and can approach or move away from the thin metal wire in the horizontal direction. A wire guide assembly is provided above the printing needle assembly, and the wire guide assembly includes a needle clamp seat 14, a wire guide needle 141 fixed in the needle clamp seat, and a needle protection block 142 arranged outside the wire guide needle, and a wire guide hole coaxial with the printing needle assembly is provided in the wire guide needle. The printing needle assembly includes a ceramic needle 132 and a metal needle tip 133 arranged in the feed adapter block, and the ceramic needle is used to pass the thin metal wire; the metal needle tip is coaxially sleeved on the outside of the ceramic needle, as shown in FIG. Figure 6 As shown, a printing channel 134 is formed between the metal needle tip and the ceramic needle, and the printing channel is connected to the feed channel.

[0052] like Figure 4 and Figure 8As shown, the winding positioning assembly includes a third fixed plate 70 installed on the I-type mounting plate, a winding positioning block 71 arranged below the printing needle assembly, a first driving member 72 for driving the winding positioning block to approach or move away from the thin metal wire, and a first proximity switch 73 for detecting the position of the winding positioning block. The winding positioning block is provided with a first adjusting slide 711, the first adjusting slide is arranged on the lower surface of the third fixed plate, the lower surface of the first adjusting slide is provided with a first driving member mounting plate 722, the first driving member 72 is installed on the first driving member mounting plate 722, and the first driving member adopts a telescopic cylinder to drive the winding positioning block to move closer to or away from the thin metal wire. The extension and retraction of the winding positioning block 71, the first adjustment slide is used to adjust the position of the winding positioning block; the first driving member is provided with a first limit block 721, the first limit block is made of polyurethane material, fixed on the back of the first driving member mounting plate, the first limit block is used to limit the retracted position of the first driving member, and at the same time plays a buffering role; the first driving member is provided with a winding positioning block adapter plate 713 with a square groove at the end, the winding positioning block 71 is arranged in the square groove opened in the winding positioning block adapter plate 713, in order to reduce the scratch between the winding positioning block and the thin metal wire, the winding positioning block is made of PEEK material. A first proximity switch mounting plate 731 is provided on one side of the first driving member mounting plate 722, the first proximity switch mounting plate is provided with a first mounting hole, and the first proximity switch is fixed in the first mounting hole with a screw. The winding positioning block is provided with a first V-shaped positioning groove 712 at one end close to the thin metal wire, and a second thin metal wire fitting surface is formed in the first V-shaped positioning groove.

[0053] like Figure 4 and Fig. 9As shown, the marking screening assembly includes a second fixed plate 40 installed on the I-type mounting plate 11, a marking material barrel 41 provided on the second fixed plate for realizing marking slurry feeding, a marking positioning block 42 connected to the marking material barrel, a second driving member 43 for driving the marking positioning block to approach or move away from the thin metal wire, and a second proximity switch 44 for detecting the position of the marking positioning block, the marking positioning block is provided with a second adjusting slide 423, the second adjusting slide 423 is provided on the lower surface of the second fixed plate 40, and the second adjusting slide is used to adjust the position of the marking positioning block; a second driving member mounting plate 432 is provided on the lower surface of the second adjusting slide 423, the second driving member 43 is installed on the second driving member mounting plate 432, the second driving member adopts a telescopic cylinder for pushing the extension and retraction of the marking positioning block 42, the second driving member is provided with a second limit block 431, the second limit block is made of polyurethane material, fixed on the back of the second driving member mounting plate 432, for limiting the retracted position of the second driving member, and at the same time plays a buffering role. A marking positioning block adapter plate 420 with a square groove at the end is provided on one side of the second driving member 43. The marking positioning block 42 is arranged in the square groove opened in the marking positioning block adapter plate 420. In order to reduce the scratch between the marking positioning block and the thin metal wire, the marking positioning block is made of PEEK material. A second proximity switch mounting plate 441 is provided on one side of the second driving member mounting plate 432. The second proximity switch mounting plate is provided with a second mounting hole. The second proximity switch 44 is fixed in the second mounting hole by screws. The marking barrel is connected to the dispensing mechanism. A marking slurry discharge channel 421 is provided through the marking positioning block. The marking positioning block is arranged below the printing needle assembly and can approach or move away from the thin metal wire in a direction perpendicular to the transmission direction of the thin metal wire; one end of the marking slurry discharge channel is connected to the discharge port of the marking barrel, and the other end contacts the thin metal wire during marking.

[0054] like Fig. 9 As shown, the second drive member mounting plate 432 is also provided with a feed block 415, and a feed connector 413 and a discharge connector 414 are respectively fixed on the upper and lower surfaces of the feed block, and the discharge port of the marking material cylinder 41 for containing the marking slurry is tightened with the feed connector 413 through a Luer thread, and a feed connector 412 is installed on one side of the marking positioning block 42, and the discharge connector 414 and the feed connector 412 are connected by a flexible feed pipe 411.

[0055] like Fig.10 , Fig.11 and Fig.12 As shown, the end of the marking positioning block close to the thin metal wire is provided with a second V-shaped positioning groove 422, and a thin metal wire bonding surface is formed in the second V-shaped positioning groove; the end of the marking slurry discharge channel 421 that contacts the thin metal wire during marking is arranged at the center of the second V-shaped positioning groove. Fig.12As shown, a marking slurry feed channel 424 connected to the marking slurry discharge channel is also provided in the marking positioning block, and the discharge port of the marking barrel is connected in sequence through a flexible feed pipe, a feed joint and the marking slurry feed channel.

[0056] like Fig.13 As shown, in the initial state, the surface of the thin metal wire includes a paint removal segment 21 and a non-paint removal segment 22, wherein the paint removal segment is 20 mm long and 50 μm in diameter, which can be used for surface coating of battery slurry, and the non-paint removal segment is 100 mm long and 60 μm in diameter. The paint removal segment and the non-paint removal segment are evenly distributed in an array along the length direction of the thin metal wire.

[0057] The embodiment of the present application also provides a method for online defective screening and marking of coaxial coated metal wires, which uses the above-mentioned coaxial coated metal wire online defective screening and marking device, including the following steps: (1) Reset the winding positioning assembly 7 and the marking screening assembly 4 so that the winding positioning block 71 and the marking positioning block 42 are respectively retracted in a direction away from the thin metal wire; (2) The battery slurry is filled into the coating material cylinder 12, and the coating material cylinder is fixed on the feeding adapter block 13 and connected to the first air outlet of the dispensing mechanism 8; (3) Fill the marking material cylinder 41 with marking slurry, fix the marking material cylinder 41 to the material supply connector 413, and connect it to the second air outlet of the dispensing mechanism 8; (4) Pull the thin metal wire 2 out from the unwinding mechanism 5, pass it through the wire guide needle 141, the ceramic needle 132, and the metal needle tip 133 in sequence, and wind it into the winding mechanism 6; (5) The first driving member 72 on the winding positioning assembly 7 drives the winding positioning block 71 to extend, so that the thin metal wire 2 is embedded in the first V-shaped positioning groove 712 of the winding positioning block; (6) The winding mechanism 6 starts, driving the thin metal wire 2 to move downward. When the visual detection component 3 detects the diameter change section of the thin metal wire, the winding mechanism 6 stops, and the first driving member 72 on the winding positioning component 7 drives the winding positioning block 71 to retract; (7) The driving mechanism 9 drives the coaxial coated metal wire online defective product screening and marking device to drive the feed adapter block 13 to descend to the diameter change section of the thin metal wire 2. The dispensing mechanism 8 applies positive pressure to the coating barrel 12 through the first air outlet, so that the metal needle tip 133 extrude the battery slurry. At the same time, the driving mechanism 9 drives the feed adapter block 13 to move upward by 20 mm, so that the paint removal section 21 of the thin metal wire 2 is coated with the battery slurry. The coating process is as follows: Figure 3 As shown; (8) After the driving mechanism 9 moves upward by 20 mm, the first air outlet 8 at the back of the dispensing machine changes from applying positive pressure to applying negative pressure, and the coaxial coating assembly sucks back and cuts off the material; (9) After the lifting device 9 continues to move upward for 30 mm, it stops moving; (10) The winding mechanism 6 is started to move the thin metal wire 2 downward by 10 mm. The visual inspection component 3 detects the diameter of the coating section 211 of the thin metal wire 2. If the detected diameter meets the requirements, steps (5) and (9) are repeated; if the detected diameter does not meet the requirements, step (11) is executed. (11) The second driving member 43 on the marking screening component 4 drives the marking positioning block 42 to extend, so that the thin metal wire 2 is embedded in the second V-shaped positioning groove 422 of the marking positioning block. The glue dispensing mechanism 8 applies positive pressure to the marking material barrel 41 through the second air outlet, so that the marking slurry flows out from the marking slurry discharge channel 421 in the second V-shaped positioning groove 422 of the marking positioning block 42 and adheres to the non-paint removal section 22 of the thin metal wire 2 to form a marking point 221, thereby realizing the marking function. After the positive pressure is applied at the second air outlet of the glue dispensing mechanism 8 for 1 second, the second driving member 43 drives the marking positioning block 42 to retract, and the second air outlet of the glue dispensing mechanism 8 changes from applying positive pressure to applying negative pressure, and the marking screening component sucks back the material. The morphology of the thin metal wire 2 after marking is as shown in FIG. Fig.14 As shown; (12) Until the thin metal wire 2 on the unwinding mechanism 5 is completely consumed, the defective screening and marking of all the thin metal wires are completed.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A coaxial coated metal wire online defective product screening and marking device, characterized in that: include: A coaxial coating assembly (1) is used for coaxially coating a battery slurry on a surface of a thin metal wire (2); A visual inspection component (3) is used to locate the coating position of the thin metal wire and to detect whether the size of the coated thin metal wire is qualified; The marking screening component (4) is used to apply marking slurry on the surface of the thin metal wire to mark defective products when the visual inspection component detects that the size of the coated thin metal wire is unqualified.

2. The on-line defective product screening and marking device for coaxial coated metal wire according to claim 1 is characterized in that: The surface of the thin metal wire has paint removal sections (21) and non-paint removal sections (22) that are spaced apart, and the coaxial coating assembly is used to sequentially and coaxially coat the battery slurry on the paint removal sections on the surface of the thin metal wire, and the coating section (211) is formed after the battery slurry is coated on the surface of the paint removal sections; The marking screening component is used to apply marking slurry to the non-paint-removed section of the thin metal wire close to the coating section to form a marking point (221) to mark the defective product when the visual detection component detects that the size of the coating section of the thin metal wire is unqualified.

3. The on-line defective product screening and marking device for coaxial coated metal wire according to claim 1 is characterized in that: The coaxial coated metal wire online defective product screening and marking device also includes: An unwinding mechanism (5) is used to unwind the thin metal wire before coaxially coating the battery slurry; The winding mechanism (6) is used to wind the thin metal wire after the battery slurry is coaxially coated on it.

4. The on-line defective product screening and marking device for coaxial coated metal wire according to claim 3 is characterized in that: The winding mechanism further comprises a winding positioning component (7), which is used for positioning the thin metal wire during winding.

5. The on-line defective product screening and marking device for coaxial coated metal wire according to claim 4 is characterized in that: The coaxial coated metal wire online defective product screening and marking device further comprises a glue dispensing mechanism (8), wherein the glue dispensing mechanism is used to control the feeding and cutting of the battery slurry in the coaxial coating component and the marking slurry in the marking screening component.

6. The on-line defective product screening and marking device for coaxial coated metal wire according to claim 5, characterized in that: The coaxial coating assembly comprises a coating barrel (12) for supplying battery slurry, a supply adapter block (13) and a printing needle assembly, wherein the coating barrel is connected to a dispensing mechanism, the printing needle assembly is embedded in the supply adapter block, a supply flow channel (131) is provided through the supply adapter block, one end of the supply flow channel is connected to the discharge port of the coating barrel, and the other end is connected to the feed port of the printing needle assembly; the winding and positioning assembly is arranged below the printing needle assembly and can approach or move away from the thin metal wire in the horizontal direction.

7. The on-line defective product screening and marking device for coaxial coated metal wire according to claim 6, characterized in that: A wire guide assembly is provided above the printing needle assembly, the wire guide assembly comprising a needle holder (14), a wire guide needle (141) fixed in the needle holder, and a needle protection block (142) provided outside the wire guide needle, wherein the wire guide needle is provided with a wire guide hole coaxial with the printing needle assembly.

8. The on-line defective product screening and marking device for coaxial coated metal wire according to claim 6, characterized in that: The printing needle assembly comprises a ceramic needle (132) and a metal needle tip (133) arranged in the material supply adapter block, the ceramic needle being used to pass through a thin metal wire; the metal needle tip is coaxially sleeved outside the ceramic needle, a printing flow channel (134) is formed between the metal needle tip and the ceramic needle, and the printing flow channel is connected to the material supply flow channel.

9. The on-line defective product screening and marking device for coaxial coated metal wire according to claim 6, characterized in that: The winding positioning assembly comprises a winding positioning block (71) arranged below the printing needle assembly, a first driving member (72) for driving the winding positioning block to approach or move away from the thin metal wire, and a first proximity switch (73) for detecting the position of the winding positioning block, the winding positioning block is provided with a first adjustment slide (711), the first adjustment slide is used to adjust the position of the winding positioning block; the first driving member is provided with a first limit block (721), the first limit block is used to limit the retracted position of the first driving member; the winding positioning block is provided with a first V-shaped positioning groove (712) at one end close to the thin metal wire, and a second thin metal wire bonding surface is formed in the first V-shaped positioning groove.

10. The on-line defective product screening and marking device for coaxial coated metal wire according to claim 6, characterized in that: The marking screening component comprises a marking material barrel (41) for supplying marking slurry and a marking positioning block (42) connected to the marking material barrel, the marking material barrel is connected to a dispensing mechanism, a marking slurry discharge channel (421) is provided through the marking positioning block, the marking positioning block is arranged below the printing needle assembly and can approach or move away from the thin metal wire in a direction perpendicular to the transmission direction of the thin metal wire; one end of the marking slurry discharge channel is connected to the discharge port of the marking material barrel, and the other end contacts the thin metal wire during marking.

11. The on-line defective product screening and marking device for coaxial coated metal wire according to claim 10, characterized in that: A second V-shaped positioning groove (422) is provided at one end of the marking positioning block close to the thin metal wire, and a thin metal wire fitting surface is formed in the second V-shaped positioning groove; and the end of the marking slurry discharge channel that contacts the thin metal wire during marking is provided at the center of the second V-shaped positioning groove.

12. The on-line defective product screening and marking device for coaxial coated metal wire according to claim 11, characterized in that: A flexible feed pipe (411) and a feed joint (412) are provided between the marking material barrel and the marking positioning block, and a marking slurry feed channel (424) connected to the marking slurry discharge channel is also provided in the marking positioning block, and the discharge port of the marking material barrel is connected in sequence through the flexible feed pipe, the feed joint and the marking slurry feed channel.

13. According to the coaxial coated metal wire online defective product screening and marking device according to claim 10, the marking screening component also includes a second driving member (43) for driving the marking positioning block to approach or move away from the thin metal wire and a second proximity switch (44) for detecting the position of the marking positioning block, the marking positioning block is provided with a second adjustment slide (423), the second adjustment slide is used to adjust the position of the marking positioning block; the second driving member is provided with a second limit block (431), the second limit block is used to limit the retracted position of the second driving member.

14. The on-line defective product screening and marking device for coaxial coated metal wire according to claim 1, characterized in that: The coaxial coated metal wire online defective product screening and marking device further comprises a driving mechanism (9), wherein the driving mechanism is used to drive the coaxial coated metal wire online defective product screening and marking device to move relative to the axial direction of the thin metal wire.

15. A method for online defective screening and marking of coaxial coated metal wires, characterized in that: The coaxial coated metal wire online defective product screening and marking device as claimed in any one of claims 1 to 14 comprises the following steps: (1) Coaxially coating the battery slurry on the surface of the thin metal wire using a coaxial coating assembly; (2) Using a visual inspection component to locate the coating position of the thin metal wire and to detect whether the size of the coated thin metal wire is qualified; (3) When the visual inspection component detects that the size of the coated thin metal wire is unqualified, the marking screening component is used to apply marking slurry on the surface of the thin metal wire to mark defective products; when the visual inspection component detects that the size of the coated thin metal wire is qualified, steps (1) and (2) are repeated.

16. According to the method for online defective product screening and marking of coaxial coated metal wires as claimed in claim 15, the surface of the thin metal wire has paint removal sections and non-paint removal sections distributed at intervals, and in step (1), coaxially coating the surface of the thin metal wire with battery slurry comprises: coaxially coating the paint removal sections on the surface of the thin metal wire with battery slurry in sequence, and forming a coated section after coating the surface of the paint removal sections with battery slurry; in step (3), coating the surface of the thin metal wire with marking slurry comprises: coating the non-paint removal sections of the thin metal wire close to the coating sections with marking slurry to form marking points.

17. The method for online defective screening and marking of coaxial coated metal wire according to claim 15, characterized in that: The coaxial coated metal wire online defective product screening and marking device further includes a reeling mechanism and a reeling mechanism; the coaxial coated metal wire online defective product screening and marking method further includes: An unwinding mechanism is used to unwind the thin metal wire before coaxial coating of the battery slurry; A winding mechanism is used to wind up the thin metal wire after coaxially coating the battery slurry.

18. The method for online defective screening and marking of coaxial coated metal wires according to claim 17, characterized in that: The winding mechanism also includes a winding positioning component; the coaxial coated metal wire online defective product screening and marking method also includes: During the winding process of the thin metal wire, a winding positioning component is used to position the thin metal wire.

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