A vacuum coating apparatus and control method for adjusting the width of metal vapor deposition.

Abstract

This invention discloses a vacuum coating apparatus and its control method for adjusting the width of metal vapor deposition. The vacuum coating apparatus for adjusting the width of metal vapor deposition includes a base, a rotating moving platform, a distribution box, a heater, a laser rangefinder, and a control system. The rotating moving platform includes an angle rotation mechanism, a moving platform, and a moving mechanism. The distribution box is mounted on the moving platform via the moving mechanism, and a nozzle is provided on the distribution box. The heater covers the distribution box and the nozzle. The laser rangefinder is located on both sides of the metal strip. The control system receives the distance signal measured by the laser rangefinder, controls the angle rotation mechanism to drive the moving platform to rotate, so that the horizontal width of the metal vapor deposition matches the width of the metal strip, and adjusts the position of the distribution box through the moving mechanism to ensure that all metal vapor is deposited on the metal strip. This invention can adjust the horizontal width of the metal vapor deposition in real time.

Description

Technical Field

[0001] This invention relates to the field of metal strip surface coating technology, and to a vacuum coating apparatus and control method for adjusting the width of metal vapor deposition. Background Technology

[0002] With the development of the steel industry, the market has higher and higher requirements for coated steel sheets, such as automotive steel sheets and appliance steel sheets. These sheets not only need to have good deep-drawing properties, paintability, and corrosion resistance, but also good coating appearance and coating adhesion, which puts higher demands on the coating process.

[0003] Vacuum coating, as a surface modification and coating process, has been widely used in industries such as electronics, glass, and plastics. The main advantages of vacuum coating technology lie in its environmental friendliness, excellent coating performance, and versatility in the types of materials that can be coated. The key to applying vacuum coating technology to continuous strip steel production lies in several aspects, including continuous production, large-area coverage, high speed, and large-scale production. Since the 1980s, major steel companies worldwide have conducted extensive research on this technology, which is receiving unprecedented attention and is considered an innovative surface coating process.

[0004] Currently, publicly available information both domestically and internationally regarding vacuum coating technology mainly covers the following aspects:

[0005] 1) Integrated structure of evaporation crucible and flow nozzle

[0006] European patents BE1009321A6 and BE1009317A61 respectively disclose the following Figure 1 , Figure 2 The crucible nozzle structure, in Figure 1 In the structure, a lid 2 is added to the upper part of the crucible 1, forming a nozzle structure between the lid 2 and the furnace wall for direct injection of evaporated metal. Figure 2 In the structure, a filter plate 3 is added to the evaporation crucible, and then the metal vapor is injected through a slit nozzle at the top. In the design of the nozzles of these two devices, one adopts lateral injection and the other adopts vertical injection from below. The nozzles are arranged in two ways: one is simultaneous injection from both sides, and the other is sequential injection from both sides.

[0007] Related evaporation crucible and nozzle structures are also disclosed in patents JPS59177370A and US4552092A. Figure 3 A crucible nozzle structure with automatic molten metal replenishment is presented. The nozzle 4 has a wide outlet, and a heater 5 is also arranged on the upper part of the crucible for heating with steam, etc. Figure 4 The given crucible nozzle structure unfolds from an arc 6 on one side for lateral spraying, and heating tubes 7 are also arranged on the outer side of the crucible wall for heating the wall surface.

[0008] 2) Separate structure of evaporation crucible and flow nozzle

[0009] Patent WO2018 / 020311A1 discloses a split crucible nozzle structure, such as Figure 5 As shown, in this device, the crucible is connected to a molten metal supply tank 8 at the bottom, and the upper part of the crucible is supplied with metal vapor through a split pipe 9 to a tubular distributor and a steam nozzle at the front end. Then the metal vapor is sprayed onto the metal plate at high speed through the nozzle.

[0010] Chinese patent CN103249860A discloses a split-type distributor and nozzle structure, such as Figure 6 As shown, steam is sent to the upper horizontal pipe 10 through a pipe. The top of the horizontal pipe 10 has a multi-hole nozzle for uniformly spraying metal vapor onto the surface of the metal sheet.

[0011] Chinese patent CN101175866A discloses a metal steam distributor and nozzle type, such as Figure 7 The cross-sectional shape of the nozzle is shown. A wire is wound around the outside of the distributor pipe 11 to heat the pipe. The nozzle portion has a square outer shell, as shown... Figure 8 As shown, the square outer shell 12 contains a ring-shaped pipe made of another material for injecting metal vapor, and the nozzle uses a multi-hole type of steam outlet.

[0012] The above-mentioned techniques all involve the specific form of the nozzle during the coating process, but they cannot adjust the horizontal width of the metal vapor deposition, nor can they make the metal vapor deposition width consistent with the width of the metal strip. Summary of the Invention

[0013] To address the problem of the inability to adjust the width of metal vapor deposition in existing technologies, the present invention aims to provide a vacuum coating device and its control method for adjusting the width of metal vapor deposition. This device can adjust the horizontal width of metal vapor deposition in real time, ensuring that the width of the deposited metal alloy is consistent with the width of the metal strip, and also guaranteeing the consistency of the coating on metal strips of different widths in different batches. Using the device of the present invention, a good coating appearance and coating adhesion can be obtained. It also reduces pollution emissions, facilitates operation, reduces manual labor intensity, improves work efficiency, increases the recovery rate of metal vapor at the edge of the strip, and reduces production costs.

[0014] To achieve the above objectives, the present invention adopts the following technical solution:

[0015] A first aspect of the present invention provides a vacuum coating apparatus for adjusting the width of metal vapor deposition, comprising a base, a rotating moving platform, a flow distribution box, a heater, a laser rangefinder, and a control system;

[0016] The rotating moving platform includes an angle rotation mechanism mounted on the base, a moving platform connected to the angle rotation mechanism, and a moving mechanism mounted on the moving platform; the angle rotation mechanism is used to rotate the moving platform; the moving mechanism is used to adjust the position of the distribution box on the moving platform;

[0017] The distribution box is mounted on the moving platform via the moving mechanism. The distribution box is equipped with nozzles. Metal vapor is ejected from the nozzles through the distribution box to form a metal vapor jet, which is deposited on the surface of the metal strip to form a coating.

[0018] The heater covers the distribution box and the nozzle to heat the distribution box and the nozzle;

[0019] The laser rangefinders are located on both sides of the metal strip to measure the distance between the laser rangefinders and the metal strip in real time.

[0020] The control system receives the distance signal measured by the laser rangefinder, controls the angle rotation mechanism to drive the moving platform to rotate, so that the horizontal width of the metal vapor deposition is consistent with the width of the metal strip, and adjusts the position of the distribution box through the moving mechanism so that the edge of the metal vapor jet is aligned with the edge of the metal strip.

[0021] Preferably, the angle rotation mechanism includes a rotating base, a first servo motor mounted on the rotating base, a coupling connected to the output shaft of the first servo motor, and a rotating assembly connected to the first coupling; the first servo motor drives the moving platform to rotate through the first coupling and the rotating assembly, so that the horizontal width of the metal vapor deposition is consistent with the width of the metal strip.

[0022] Preferably, the rotating assembly includes a drive gear connected to the first coupling and a rotating gear meshing with the drive gear. The drive gear is disposed on the rotating base, and the rotating gear is fixedly connected to the moving platform.

[0023] Preferably, the moving mechanism includes a second servo motor mounted on the moving platform, a second coupling connected to the output end of the second servo motor, and a lead screw assembly connected to the coupling; the lead screw assembly includes a ball screw connected to the second coupling and a lead screw slider mounted on the ball screw, the ball screw being fixed to the moving platform, and the lead screw slider being fixedly connected to the distribution box.

[0024] Preferably, an insulation layer is provided between the heater and the lead screw slider.

[0025] A second aspect of the present invention provides a control method for a vacuum coating apparatus for adjusting the width of metal vapor deposition as described in the first aspect of the present invention, comprising the following steps:

[0026] S1, the control system receives the distance measured by the laser rangefinders on both sides of the metal strip, obtains the target arc of the rotating platform and the target movement data of the distribution box, and outputs the rotation signal and movement signal.

[0027] S2, after the angle rotation mechanism adjusts the moving platform to the zero position, it drives the moving platform to rotate according to the rotation signal, so that the horizontal width of the metal vapor deposition is consistent with the width of the metal strip.

[0028] S3, the moving mechanism moves the distribution box according to the moving signal, so that the edge of the metal vapor jet is aligned with the edge of the metal strip;

[0029] S4, the heater heats the distribution box and the nozzle, and the metal vapor is ejected from the nozzle through the distribution box to form a metal vapor jet, which is deposited on the surface of the metal strip to form a coating.

[0030] Preferably, in step S1, the target radian C of the mobile platform rotation is:

[0031]

[0032] W1 = WW a -W b

[0033] In the formula, C is the target radian of the mobile platform rotation;

[0034] W1 is the width of the metal strip, in mm;

[0035] W2 represents the width of the metal vapor deposition, in mm;

[0036] W represents the distance between the two laser rangefinders, in mm;

[0037] W a The distance measured by the laser rangefinder on the operating side is in mm;

[0038] W b The distance measured by the laser rangefinder on the drive side is in mm.

[0039] Preferably, the target radian C of the mobile platform rotation is in the range of 0 to 2π / 5.

[0040] Preferably, in step S1, the movement data of the distribution box is acquired in the following way:

[0041] Calculate the distance W measured by the laser rangefinder on the operating side. a Distance W measured by the laser rangefinder on the drive side b The difference n is used to determine the moving direction and moving distance of the distribution box.

[0042] Preferably, the direction and distance of movement of the distribution box are determined by the following method:

[0043] The difference n is: n = W a -W b When n > 0, the second servo motor of the moving mechanism rotates forward, and the distribution box moves towards the laser rangefinder on the operating side. When n < 0, the second servo motor of the moving mechanism reverses, and the distribution box moves towards the laser rangefinder on the driving side. When n=0, the second servo motor of the moving mechanism does not work, and the distribution box does not move.

[0044] Preferably, step S2 includes the following process:

[0045] S21, after the mobile platform returns to the zero position, the first servo motor of the angle rotation mechanism rotates according to the target arc of the rotation signal, causing the mobile platform to rotate;

[0046] S22, the first servo motor detects the radian of its rotation in real time through an encoder until the radian detected by the encoder matches the target radian in the rotation signal. At this time, the horizontal width of the metal vapor deposition matches the width of the metal strip.

[0047] Preferably, step S3 includes the following process:

[0048] S31, the second servo motor of the moving mechanism rotates according to the target moving direction and target moving distance in the moving signal, thereby driving the distribution box to move;

[0049] S32, the second servo motor obtains the actual moving direction and actual moving distance of the distribution box in real time through pulse feedback signal. When the actual moving direction and actual moving distance are consistent with the target moving direction and target moving distance in the moving signal, the edge of the metal vapor jet is aligned with the edge of the metal strip.

[0050] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0051] 1. The vacuum coating device and control method for adjusting the width of metal vapor deposition of the present invention adjusts the position of the distribution box by means of a laser rangefinder and a moving platform, and adjusts the moving platform by means of an angle rotation mechanism to tilt the moving platform, so that the horizontal width of metal vapor deposition is consistent with the width of the metal strip.

[0052] 2. The vacuum coating device for adjusting the width of metal vapor deposition of the present invention does not require the replacement of the distribution box and nozzle due to changes in the width of the strip, and will not cause changes in the distribution of metal vapor in the pipeline due to different distribution boxes and nozzles, thus ensuring the consistency of coating of metal strips of different batches and widths.

[0053] 3. The vacuum coating apparatus and control method for adjusting the metal vapor deposition width of the present invention can not only control the metal vapor deposition width through the angle rotation mechanism, but also keep the metal vapor deposition width consistent with the width of the metal strip, so that the metal vapor is deposited onto the metal strip to the maximum extent during the deposition process, ensuring a high metal vapor recovery rate during the coating process, reducing the cost of raw materials and reducing pollution emissions.

[0054] 4. The vacuum coating device for adjusting the width of metal vapor deposition of the present invention does not require breaking the original vacuum environment to replace the distribution box and nozzle to adapt to the changes in the width of the metal strip. This reduces the contamination of impurities in the air and maintains the consistency of vacuum degree between different batches. As a result, a good coating appearance and coating adhesion can be obtained. At the same time, it is convenient for personnel to operate, reduces the intensity of manual labor, improves work efficiency, and reduces production costs. Attached Figure Description

[0055] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0056] Figure 1 This is a schematic diagram of European patent BE1009321A6;

[0057] Figure 2 This is a schematic diagram of European patent BE1009317A61;

[0058] Figure 3 This is a schematic diagram of patent JPS59177370A;

[0059] Figure 4 This is a schematic diagram of patent US4552092A;

[0060] Figure 5 This is a schematic diagram of patent WO2018 / 020311A1;

[0061] Figure 6This is a schematic diagram of patent CN103249860A;

[0062] Figure 7 This is a schematic diagram of patent CN101175866A;

[0063] Figure 8 yes Figure 7 A schematic diagram of a rectangular outer shell;

[0064] Figure 9 This is a schematic diagram of the vacuum coating apparatus for adjusting the width of metal vapor deposition according to the present invention.

[0065] Figure 10 This is a schematic diagram of the angle rotation mechanism of the present invention;

[0066] Figure 11 This is a schematic diagram of the moving mechanism of the present invention;

[0067] Figure 12 This is a schematic diagram showing the angle formed between the rotated moving platform and the horizontal direction of the metal strip according to the present invention;

[0068] In the diagram, 1. Crucible, 2. Top cover, 3. Filter plate, 4. Nozzle, 5. Heater, 6. Arc shape, 7. Heating tube, 8. Molten metal supply tank, 9. Split-type pipe, 10. Horizontal pipe, 11. Distributor pipe, 12. Square shell, 13. Metal strip, 14. Metal vapor jet, 15. Base, 16. Operator-side laser rangefinder, 17. Drive-side laser rangefinder, 18. First servo motor, 19. Rotating assembly, 20. Moving platform, 21. Second servo motor, 22. Ball screw, 23. Heater, 24. Distributor box, 25. Steam pipe, 26. Screw slider. Detailed Implementation

[0069] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way.

[0070] This invention provides a vacuum coating apparatus for adjusting the width of metal vapor deposition. It allows for flexible and convenient deposition of metal vapor on metal strips, controlling the deposition width and ensuring consistency of coatings on metal strips of different widths from different batches. Using this apparatus, vacuum coating of metal strips can be achieved conveniently and quickly, improving the metal vapor recovery rate during the coating process, reducing energy consumption and pollution emissions, and achieving energy conservation and environmental protection.

[0071] Combination Figure 9As shown, the vacuum coating apparatus for adjusting the width of metal vapor deposition provided by the present invention includes a base 15, a rotating moving platform, a distribution box 24, a heater 23, laser rangefinders 16 and 17, and a control system. The rotating moving platform includes an angle rotation mechanism mounted on the base 15, a moving platform 20 connected to the angle rotation mechanism, and a moving mechanism mounted on the moving platform 20; the angle rotation mechanism is used to rotate the moving platform; the moving mechanism is used to adjust the position of the distribution box 24 on the moving platform 20. The distribution box 24 is mounted on the moving platform 20 via the moving mechanism. The distribution box 24 is equipped with nozzles, and metal vapor is ejected from the nozzles through the distribution box 24 to form a metal vapor jet, which deposits a coating on the surface of the metal strip 13. The heater 23 covers the distribution box 24 and the nozzles, and is used to heat the distribution box 24 and the nozzles. The heating temperature of the heater 23 is adjustable (e.g., between 600 and 800°C). Laser rangefinders 16 and 17 are respectively located on both sides of the metal strip 13 to measure the distance between the laser rangefinder and the metal strip 13 in real time. The control system receives the distance signal measured by the laser rangefinder and controls the angle rotation mechanism to drive the moving platform 20 to rotate, so that the horizontal width of the metal vapor deposition on the surface of the metal strip 13 is consistent with the width of the metal strip 13. The position of the distribution box 24 is adjusted by the moving mechanism to ensure that all the metal vapor is deposited on the metal strip 13, thereby ensuring a high yield during the coating process, reducing production costs, and reducing pollution emissions.

[0072] Combination Figure 10 As shown, the angle rotation mechanism includes a rotating base, a first servo motor 18 mounted on the rotating base, a first coupling connected to the output shaft of the first servo motor 18, and a rotating assembly 19 connected to the first coupling. The first servo motor 18 drives the moving platform 20 to rotate through the first coupling and the rotating assembly 19, so that the horizontal width of the metal vapor deposition is consistent with the width of the metal strip 13.

[0073] Combination Figure 10 As shown, the rotating assembly 19 includes a drive gear connected to the first coupling and a rotating gear meshing with the drive gear. The drive gear is mounted on a rotating base, and the rotating gear is fixedly connected to the moving platform 20.

[0074] Combination Figure 11 As shown, the moving mechanism includes a second servo motor 21 mounted on the moving platform 20, a second coupling connected to the output end of the second servo motor 21, and a lead screw assembly connected to the coupling. The lead screw assembly includes a ball screw 22 connected to the second coupling and a lead screw slider 26 mounted on the ball screw 22. The ball screw 22 is fixed on the moving platform 20, and the lead screw slider 26 is fixedly connected to the distribution box 24.

[0075] In a specific embodiment, an insulation layer is provided between the heater 23 and the lead screw slider 26.

[0076] In a specific embodiment, a nozzle is provided on the top of the distribution box 24. Metal vapor enters the distribution box 24 through the steam pipe 25 and is then ejected through the nozzle to form a metal vapor jet 14.

[0077] In a specific embodiment, the control system is a PLC or a driver; wherein the control system is connected to the laser rangefinder, the first servo motor 18, the second servo motor 21, and the heater 23 respectively. The control system receives the distance measured by the laser rangefinder on both sides of the metal strip 13 in real time, and controls the first servo motor 18 and the second servo motor 21 to move by outputting pulse signals or by direct communication assignment, thereby realizing the adjustment of the moving platform 20 and the distribution box 24.

[0078] Combination Figure 9 As shown, the vacuum coating apparatus for adjusting the width of metal vapor deposition using the present invention does not require replacement of the distribution box 24 and nozzles due to changes in the width of the metal strip 13. The horizontal width of metal vapor deposition can be controlled directly by adjusting the position of the moving platform 20 and the distribution box 24, ensuring the consistency of the coating layer of metal strips of different widths in different batches. At the same time, it enables a high metal vapor recovery rate during the coating process, reducing production costs and pollution emissions.

[0079] The present invention also provides a control method for a vacuum coating apparatus for adjusting the width of metal vapor deposition, comprising the following steps:

[0080] S1, the control system receives the distance measured by the laser rangefinders on both sides of the metal strip 13, obtains the target arc of the rotating platform 20 and the movement data of the distribution box 24, and outputs the rotation signal and the movement signal.

[0081] Specifically, laser rangefinders on both sides of the metal strip 13 measure and transmit the distance W between themselves and the metal strip 13 in real time. a W b After receiving the distance measured by the laser rangefinders on both sides of the metal strip 13, the control system calculates the width W1 of the metal strip 13 and calculates the target radian of the rotation of the moving platform 20 (i.e., the angle formed between the moving platform 20 and the horizontal direction of the metal strip 13 after the moving platform 20 rotates, the zero position of the moving platform 20 is the angle of the horizontal direction of the metal strip 13 being 0) and the target movement data of the distribution box 24. Then the control system outputs a rotation signal to the angle rotation mechanism and outputs a movement signal to the moving mechanism.

[0082] Combination Figure 12 As shown, the width of the metal strip 13 is determined by the formula: W1 = WW a-W b The calculation is performed, where W is the distance between the two laser rangefinders, in mm. This distance is a fixed distance and is known data. a The distance measured by the laser rangefinder 16 on the operating side, in mm; W b The distance measured by the laser rangefinder 17 on the drive side is in mm.

[0083] The target radian C of the rotation of the mobile platform 20 is calculated using the following formula:

[0084]

[0085] Wherein, C is the target radian of rotation of the moving platform 20; W1 is the width of the metal strip 13 in mm; W2 is the width of the metal vapor jet 14 in mm, and W2 is known data that can be determined by the nozzles in the distribution box 24. The range of the target radian C of rotation of the moving platform 20 is 0 to 2π / 5.

[0086] The target movement data of the distribution box 24 includes the target movement direction and the target movement distance; the target movement data of the distribution box 24 is obtained through the following methods:

[0087] First, calculate the distance W measured by the laser rangefinder 16 on the operating side. a Distance W measured by the drive-side laser rangefinder 17 b The difference n is used to obtain the moving direction and moving distance of the distribution box 24;

[0088] The direction and distance of movement of the distribution box 24 are obtained in the following ways:

[0089] The difference n is: n = W a -W b When n > 0, the second servo motor 21 of the moving mechanism rotates forward, and the distribution box 24 moves toward the laser rangefinder 16 on the operating side. When n < 0, the second servo motor 21 of the moving mechanism reverses, and the distribution box 24 moves toward the drive-side laser rangefinder 17. When n=0, the second servo motor 21 of the moving mechanism does not work, and the distribution box 24 does not move.

[0090] The movement signals output by the control system include direction signals that control the movement direction (i.e., the forward and reverse rotation of the motor) and pulse signals that control the movement distance.

[0091] S2, after the moving platform returns to the zero position, the angle rotation mechanism drives the moving platform 20 to rotate according to the rotation signal, so that the horizontal width of the metal vapor deposition is consistent with the width of the metal strip 13.

[0092] S21, after the mobile platform returns to the zero position, the first servo motor 18 of the angle rotation mechanism rotates according to the target arc of the rotation signal, causing the mobile platform 20 to rotate.

[0093] Specifically, the angle rotation mechanism first adjusts the moving platform to the zero position, which is the position where the angle between the moving platform and the horizontal direction of the metal strip is 0. Then, after the first servo motor 18 of the angle rotation mechanism receives the rotation signal from the control system, the first servo motor 18 rotates precisely according to the target arc C of the rotation signal, and drives the rotating component 19 to rotate through the first coupling, so that the moving platform 20 tilts.

[0094] S22, the first servo motor 18 detects the radian of its rotation in real time through an encoder until the radian detected by the encoder matches the target radian in the rotation signal. At this time, the horizontal width of the metal vapor deposition matches the width of the metal strip 13.

[0095] Specifically, after the angle rotation mechanism drives the mobile platform 20 to rotate according to the rotation signal, the first servo motor 18 of the angle rotation mechanism detects its rotation arc in real time through the encoder and compares it with the target arc C of the rotation signal. If the two are inconsistent, it means that there is a deviation between them. It is necessary to detect and continue to adjust the rotation arc in real time until the two are consistent. At this time, the horizontal width of metal vapor deposition is consistent with the width of metal strip 13, and the target feedback control is completed.

[0096] S3, the moving mechanism moves the distribution box 24 according to the moving signal, so that the edge of the metal vapor jet is aligned with the edge of the metal strip 13;

[0097] S31, the second servo motor 21 of the moving mechanism rotates according to the target moving direction and target moving distance in the moving signal, driving the distribution box 24 to move;

[0098] Specifically, after receiving the movement signal output by the control system, the second servo motor 21 of the moving mechanism rotates according to the target movement direction and target movement distance in the movement signal, and drives the ball screw assembly through the second coupling to move the distribution box 24 covering the heater 23 and the nozzle along the ball screw to the target position.

[0099] S32, the second servo motor 21 obtains the actual moving direction and actual moving distance of the distribution box 24 in real time through pulse feedback signal. When the actual moving direction and actual moving distance are consistent with the target moving direction and target moving distance in the moving signal, the edge of the metal vapor jet 14 is aligned with the edge of the metal strip 13.

[0100] Specifically, the second servo motor 21 of the moving mechanism obtains the actual moving direction and actual moving distance of the distribution box 24 in real time through pulse feedback signals (specifically, it obtains the moving direction and moving distance of the lead screw slider 26 on the distribution box 24 based on the pulse feedback signals), and compares the obtained actual moving direction and actual moving distance with the target moving direction and target moving distance in the moving signal in step S31. If the two sets of data are inconsistent, it indicates that there is a deviation in the movement of the distribution box, and real-time adjustment is required to make the actual moving direction and actual moving distance consistent with the target data. When the two sets of data are completely consistent, the edge of the metal vapor jet 14 is aligned with the edge of the metal strip 13, so that the metal vapor can be completely deposited on the metal strip 13. At this time, the second servo motor completes closed-loop control of the moving direction and moving distance through feedback signals.

[0101] S4, heater 23 heats distribution box 24 and nozzle, metal vapor is ejected from nozzle through distribution box 24 to form metal vapor jet 14, which is deposited on the surface of metal strip 13 to form a coating.

[0102] Specifically, after the mobile platform 20 and the distribution box 24 are moved into place, metal vapor enters the distribution box 24 and the nozzle through the steam pipe 25. The control system starts the heater 23 to heat the distribution box 24 and the nozzle, which can ensure that the temperature of the distribution box 24 and the nozzle is 600-800℃. The metal vapor is ejected from the nozzle through the distribution box 24 to form a uniform metal vapor jet 14. When the high temperature metal vapor (600-800℃) comes into contact with the low temperature (60-300℃) metal strip 13, it is completely deposited on the surface of the metal strip 13 to form a uniform coating.

[0103] The metal vapor mentioned above can be a single metal vapor or a mixture of multiple metal vapors.

[0104] The following section provides a further introduction to a vacuum coating apparatus and its control method for adjusting the width of metal vapor deposition, using specific examples.

[0105] Example 1

[0106] This embodiment adopts Figure 9 The vacuum coating apparatus shown, which adjusts the width of metal vapor deposition, coats the surface of a metal strip using the following steps:

[0107] (1) When the control system receives the distance measured by the laser rangefinders on both sides of the metal strip, the distance W from the laser rangefinder on the operating side to the edge of the metal strip is... a =700mm, the distance W from the drive-side laser rangefinder to the edge of the metal strip. b=500mm. After the control system receives the distance measured by the laser rangefinders on both sides of the metal strip, based on the distance between the two laser rangefinders W = 2000mm and the metal vapor deposition width W2 = 1600mm, the width of the metal strip W1 = 2000 - 700 - 500 = 800mm is calculated. Then the target radian of the moving platform rotation C = arccos(W1 / W2) = π / 3. The first servo motor rotates according to the target radian C = π / 3. The target movement data of the distribution box is: the difference n = 700 - 500 = 200 > 0. Then the second servo motor rotates forward, and the distribution box moves |n / 2| = 200 / 2 = 100mm towards the laser rangefinder on the operating side. The control system outputs a rotation signal (i.e., the target radian C of the moving platform rotation) to the angle rotation mechanism and outputs a movement signal (the target movement direction and target movement distance of the distribution box) to the moving mechanism.

[0108] (2) After the mobile platform returns to the zero position, the first servo motor of the angle rotation mechanism receives the rotation signal from the control system and rotates precisely according to the target arc C = π / 3. The first servo motor drives the rotating component to rotate through the first coupling, causing the mobile platform to tilt. At the same time, the encoder of the first servo motor detects the arc it rotates in real time. This arc is consistent with the target arc C. At this time, the horizontal width of the metal vapor deposition is consistent with the width of the metal strip.

[0109] (3) The control system outputs a movement signal (i.e., a pulse signal and a direction signal) to control the second servo motor of the movement mechanism to rotate forward. The second servo motor drives the rolling screw to rotate through the coupling, which drives the distribution box and nozzle covering the heater to move 100mm toward the laser rangefinder on the operating side. Then, the second servo motor obtains the actual movement direction and actual movement distance of the distribution box according to the pulse feedback signal. It compares the actual movement direction and actual movement distance in the pulse feedback signal with the target movement direction and target movement distance in the received movement signal. When the two sets of data are completely the same, the feedback control of the second servo motor is completed. At this time, the edge of the metal vapor jet is aligned with the edge of the metal strip, so that the metal vapor can be deposited on the metal strip.

[0110] (4) After the mobile platform and the distribution box are moved into place, the metal vapor enters the distribution box and nozzle through the steam pipe. The control system starts the heater to heat the distribution box and nozzle, which can ensure that the temperature of the distribution box and nozzle is 600-800℃. The metal vapor is sprayed out from the nozzle through the distribution box to form a uniform metal vapor jet. When the high temperature metal vapor (600-800℃) comes into contact with the low temperature (60-300℃) metal strip, all the metal vapor sprayed from the nozzle on the distribution box is deposited on the surface of the metal strip to form a uniform coating.

[0111] Example 2

[0112] This embodiment adopts Figure 9 The vacuum coating apparatus shown, which adjusts the width of metal vapor deposition, coats the surface of a metal strip using the following steps:

[0113] (1) When the control system receives the distance measured by the laser rangefinders on both sides of the metal strip, the distance W from the laser rangefinder on the operating side to the edge of the metal strip is... a =500mm, the distance W from the drive-side laser rangefinder to the edge of the metal strip. b =700mm. After the control system receives the distance measured by the laser rangefinders on both sides of the metal strip, based on the distance between the two laser rangefinders W = 2000mm and the metal vapor deposition width W2 = 1600mm, the width of the metal strip W1 = 2000 - 500 - 700 = 800mm is calculated. Then the target radian of the moving platform rotation C = arccos(W1 / W2) = π / 3. The first servo motor rotates according to the target radian C = π / 3. The movement data of the distribution box is: the difference n = 500 - 700 = -200 < 0. Then the second servo motor reverses, and the distribution box moves |n / 2| = |-200 / 2| = 100mm towards the laser rangefinder on the drive side. The control system outputs a rotation signal (i.e., the target radian C of the moving platform rotation) to the angle rotation mechanism and outputs a movement signal (the target movement direction and target movement distance of the distribution box) to the movement mechanism.

[0114] (2) After the mobile platform returns to the zero position, the first servo motor of the angle rotation mechanism receives the rotation signal from the control system and rotates precisely according to the target arc C = π / 3. The first servo motor drives the rotating component to rotate through the first coupling, causing the mobile platform to tilt. At the same time, the encoder of the first servo motor detects the arc it rotates in real time. This arc is consistent with the target arc C. At this time, the horizontal width of the metal vapor deposition is consistent with the width of the metal strip.

[0115] (3) The control system outputs a movement signal (i.e., a pulse signal and a direction signal) to control the second servo motor of the movement mechanism to reverse. The second servo motor drives the rolling screw to rotate through the coupling, which drives the distribution box and nozzle covering the heater to move 100mm toward the laser rangefinder on the drive side. Then, the second servo motor obtains the actual movement direction and actual movement distance of the distribution box according to the pulse feedback signal. It compares the actual movement direction and actual movement distance in the pulse feedback signal with the target movement direction and target movement distance in the received movement signal. When the two sets of data are completely the same, the feedback control of the second servo motor is completed. At this time, the edge of the metal vapor jet is aligned with the edge of the metal strip, so that the metal vapor can be deposited on the metal strip.

[0116] (4) After the mobile platform and the distribution box are moved into place, the metal vapor enters the distribution box and nozzle through the steam pipe. The control system starts the heater to heat the distribution box and nozzle, which can ensure that the temperature of the distribution box and nozzle is 600-800℃. The metal vapor is sprayed out from the nozzle through the distribution box to form a uniform metal vapor jet. When the high temperature metal vapor (600-800℃) comes into contact with the low temperature (60-300℃) metal strip, all the metal vapor sprayed from the nozzle on the distribution box is deposited on the surface of the metal strip to form a uniform coating.

[0117] Example 3

[0118] This embodiment adopts Figure 9 The vacuum coating apparatus shown, which adjusts the width of metal vapor deposition, coats the surface of a metal strip using the following steps:

[0119] (1) When the control system receives the distance measured by the laser rangefinders on both sides of the metal strip, the distance W from the laser rangefinder on the operating side to the edge of the metal strip is... a =200mm, the distance W from the drive-side laser rangefinder to the edge of the metal strip. b =200mm. After the control system receives the distance measured by the laser rangefinders on both sides of the metal strip, based on the distance between the two laser rangefinders W = 2000mm and the metal vapor deposition width W2 = 1600mm, it calculates the width of the metal strip W1 = 2000 - 200 - 200 = 1600mm. Then, the target radian of the moving platform rotation C = arccos(W1 / W2) = 0, so the first servo motor does not work and the moving platform does not rotate; The target movement data of the distribution box is: the difference n = 200 - 200 = 0, so the second servo motor does not work and the distribution box does not move. The control system outputs a rotation signal (i.e., the target radian of the moving platform rotation C) to the angle rotation mechanism, and outputs a movement signal (the movement direction and movement distance of the distribution box) to the movement mechanism.

[0120] (2) After the moving platform returns to the zero position, since the target arc C = 0, the first servo motor does not work and the moving platform does not rotate. At this time, the horizontal width of the metal vapor deposition is consistent with the width of the metal strip.

[0121] (3) Since the difference n = 0 between the distances measured by the two laser rangefinders, the second servo motor does not work, and the distribution box and nozzle do not move. At this time, the edge of the metal vapor jet is aligned with the edge of the metal strip, so that the metal vapor can be deposited on the metal strip.

[0122] (4) After the mobile platform and the distribution box are moved into place, the metal vapor enters the distribution box and nozzle through the steam pipe. The control system starts the heater to heat the distribution box and nozzle, which can ensure that the temperature of the distribution box and nozzle is 600-800℃. The metal vapor is sprayed out from the nozzle through the distribution box to form a uniform metal vapor jet. When the high temperature metal vapor (600-800℃) comes into contact with the low temperature (60-300℃) metal strip, all the metal vapor sprayed from the nozzle on the distribution box is deposited on the surface of the metal strip to form a uniform coating.

[0123] In summary, the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A vacuum coating apparatus for adjusting the width of metal vapor deposition, characterized in that, Includes a base, a rotating moving platform, a distribution box, a heater, a laser rangefinder, and a control system; The rotating moving platform includes an angle rotation mechanism mounted on the base, a moving platform connected to the angle rotation mechanism, and a moving mechanism mounted on the moving platform; the angle rotation mechanism is used to rotate the moving platform; the moving mechanism is used to adjust the position of the distribution box on the moving platform; The distribution box is mounted on the moving platform via the moving mechanism. The distribution box is equipped with nozzles. Metal vapor is ejected from the nozzles through the distribution box to form a metal vapor jet, and a coating is deposited on the surface of the metal strip. The heater covers the distribution box and the nozzle to heat the distribution box and the nozzle; The laser rangefinders are located on both sides of the metal strip and are used to measure the distance between the laser rangefinders and the metal strip. The control system receives the distance signal measured by the laser rangefinder, controls the angle rotation mechanism to drive the moving platform to rotate, so that the horizontal width of the metal vapor deposition is consistent with the width of the metal strip, and adjusts the position of the distribution box through the moving mechanism so that the edge of the metal vapor jet is aligned with the edge of the metal strip.

2. The vacuum coating apparatus for adjusting the width of metal vapor deposition as described in claim 1, characterized in that, The angle rotation mechanism includes a rotating base, a first servo motor mounted on the rotating base, a first coupling connected to the output shaft of the first servo motor, and a rotating assembly connected to the first coupling; the first servo motor drives the moving platform to rotate through the first coupling and the rotating assembly, so that the horizontal width of the metal vapor deposition is consistent with the width of the metal strip.

3. The vacuum coating apparatus for adjusting the width of metal vapor deposition as described in claim 2, characterized in that, The rotating assembly includes a drive gear connected to the first coupling and a rotating gear meshing with the drive gear. The drive gear is mounted on the rotating base, and the rotating gear is fixedly connected to the moving platform.

4. The vacuum coating apparatus for adjusting the width of metal vapor deposition as described in claim 1, characterized in that, The moving mechanism includes a second servo motor mounted on the moving platform, a second coupling connected to the output end of the second servo motor, and a lead screw assembly connected to the coupling; the lead screw assembly includes a ball screw connected to the second coupling and a lead screw slider mounted on the ball screw, the ball screw being fixed to the moving platform, and the lead screw slider being fixedly connected to the distribution box.

5. The vacuum coating apparatus for adjusting the width of metal vapor deposition as described in claim 4, characterized in that, An insulation layer is provided between the heater and the lead screw slider.

6. A control method for a vacuum coating apparatus for adjusting the width of metal vapor deposition as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1, the control system receives the distance measured by the laser rangefinders on both sides of the metal strip, obtains the target arc of the rotating platform and the target movement data of the distribution box, and outputs the rotation signal and movement signal. S2, after the angle rotation mechanism adjusts the moving platform to the zero position, it drives the moving platform to rotate according to the rotation signal, so that the horizontal width of the metal vapor deposition is consistent with the width of the metal strip. S3, the moving mechanism moves the distribution box according to the moving signal, so that the edge of the metal vapor jet is aligned with the edge of the metal strip; S4, the heater heats the distribution box and the nozzle, and the metal vapor is ejected from the nozzle through the distribution box to form a metal vapor jet, and deposited on the surface of the metal strip to form a coating.

7. The control method for the vacuum coating apparatus for adjusting the width of metal vapor deposition as described in claim 6, characterized in that, In step S1, the target radian C of the mobile platform rotation is: W1=WW a -W b In the formula, C is the target radian of the mobile platform rotation; W1 is the width of the metal strip, in mm; W2 is the width of the metal vapor jet, in mm; W represents the distance between the two laser rangefinders, in mm; W a The distance measured by the laser rangefinder on the operating side is in mm; W b The distance measured by the laser rangefinder on the drive side is in mm.

8. The control method for the vacuum coating apparatus for adjusting the width of metal vapor deposition as described in claim 7, characterized in that, The target radian C of the mobile platform rotation is in the range of 0 to 2π / 5.

9. The control method for the vacuum coating apparatus for adjusting the width of metal vapor deposition as described in claim 7, characterized in that, In step S1, the target movement data of the distribution box is obtained in the following way: Calculate the distance W measured by the laser rangefinder on the operating side. a Distance W measured by the laser rangefinder on the drive side b The difference n is used to obtain the target moving direction and target moving distance of the distribution box.

10. The control method for the vacuum coating apparatus for adjusting the width of metal vapor deposition as described in claim 9, characterized in that, The direction and distance of movement of the distribution box are determined by the following method: The difference n is: n = W a -W b When n > 0, the second servo motor of the moving mechanism rotates forward, and the distribution box moves towards the laser rangefinder on the operating side. When n < 0, the second servo motor of the moving mechanism reverses, and the distribution box moves towards the laser rangefinder on the driving side. When n=0, the second servo motor of the moving mechanism does not work, and the distribution box does not move.

11. The control method of the vacuum coating apparatus for adjusting the width of metal vapor deposition as described in claim 6, characterized in that, Step S2 includes the following process: S21, the first servo motor of the angle rotation mechanism rotates according to the target arc of the rotation signal, causing the mobile platform to rotate; S22, the first servo motor detects the actual curvature of the moving platform in real time through an encoder until the actual curvature matches the target curvature. At this time, the horizontal width of the metal vapor deposition matches the width of the metal strip.

12. The control method for the vacuum coating apparatus for adjusting the width of metal vapor deposition as described in claim 6, characterized in that, Step S3 includes the following process: S31, the second servo motor of the moving mechanism rotates according to the target moving direction and target moving distance in the moving signal, thereby driving the distribution box to move; S32, the second servo motor obtains the actual moving direction and actual moving distance of the distribution box in real time through pulse feedback signal. When the actual moving direction and actual moving distance are consistent with the target moving direction and target moving distance in the moving signal, the edge of the metal vapor jet is aligned with the edge of the metal strip.

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