An automatic system and method for treating a strip substrate

Abstract

The present application belongs to the technical field of shipbuilding, and particularly relates to a strip material primer automatic processing system and method. The strip material primer automatic processing system provided by the present application can automatically adapt to different specifications of ship-use strip material parts, including thickness, width and length, and can automatically adapt to the warping deformation of the strip material parts, and is more suitable for engineering application. Before starting polishing, the strip material specification does not need to be input, and the abrasive belt machine can automatically find the area to be polished, reducing manual intervention and improving the paint removal efficiency. Compared with the traditional paint removal method, the present application realizes the automatic paint removal of the polishing area of four edges of the strip material part at the same time, and can cover the head and tail end, with no dead angle polishing, and the strip material does not need to be turned over during the process. The strip material part is driven by the conveying roller to move at a constant speed, the abrasive belt machine rotates at a constant speed, and the pressing force of the abrasive belt machine between the strip material parts is relatively constant, so that the polishing and paint removal effect is stable, the base material is not damaged, and the quality requirement can be met by one-time paint removal without repeated paint removal.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, and specifically relates to an automatic treatment system and method for strip primer. Background Technology

[0002] In ship hull structure manufacturing, strips are cut from steel plates and are long rectangular in shape. They are a crucial intermediate product and basic structural component in the ship hull structure manufacturing process. To prevent rust on the surface of the strips during the long manufacturing cycle, shop primer is sprayed on the upper and lower surfaces of the steel plates during the pretreatment stage before cutting. Therefore, the surface of the strips formed after cutting is also covered with shop primer for protection. Before the next process of strip assembly and welding begins, the shop primer on the welding areas of the upper and lower surfaces of the two long sides of the strip needs to be removed to ensure the quality of the weld.

[0003] Marine steel surfaces have a certain degree of roughness, resulting in strong adhesion between the shop primer and the steel strips. In traditional manufacturing processes, removing the shop primer from the welded areas of the strips requires laying them flat on a steel platform on the workshop floor. Grinding workers then use handheld grinders or push-type belt sanders to remove the primer. Because the grinding wheels and belts vibrate when in contact with the steel strip surface during high-speed rotation, it is difficult for the grinder to manually control the handheld equipment to maintain a relatively stable optimal angle, constant contact force, and uniform travel speed, making primer removal difficult. During the process, the same area needs to be repeatedly treated to remove the primer completely. Furthermore, the primer removal from the four surfaces (the upper and lower surfaces corresponding to the two long sides of the strip) must be done strip by strip. After the upper surface is treated, the strip needs to be flipped over to treat the primer on the lower surface. Therefore, traditional methods for removing primer from steel strips suffer from problems such as uneven primer treatment, potential damage to the base material, low paint removal efficiency, and high labor intensity. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic strip primer treatment system and method for achieving rapid, uniform, and high-quality removal of primer from the welded surface of strips, solving the problems of low strip primer removal efficiency and poor consistency in traditional methods.

[0005] An automatic primer treatment system for strip materials includes a conveying platform, a fixed-side paint remover, and a movable-side paint remover. The conveying platform includes a conveyor roller conveyor with guide wheels evenly distributed along the conveying direction on one side. The conveyor roller conveyor is divided into two sections in the middle. A first transverse guide rail is installed above the rear end of the front section, and a second and third transverse guide rails are installed above and below the front end of the rear section, respectively. A pressure wheel slider is provided on the first transverse guide rail, and a vertical pressure wheel and a sensor are installed below the pressure wheel slider. The fixed-side paint remover includes a fixed-side upper belt sander and a fixed-side lower belt sander. The mobile side paint removal machine includes a mobile side upper belt sander, a mobile side lower belt sander, and a mobile side clamping wheel; the fixed side upper belt sander is fixedly installed on the second transverse guide rail near the guide wheel; the fixed side lower belt sander is fixedly installed on the third transverse guide rail near the guide wheel; the mobile side upper belt sander and the mobile side lower belt sander are respectively installed on the second transverse guide rail and the third transverse guide rail via transverse sliding blocks, and the mobile side upper belt sander and the mobile side lower belt sander are connected by a longitudinal guide rail and move synchronously; the mobile side clamping wheel is installed on the longitudinal guide rail via a longitudinal sliding block.

[0006] Furthermore, the fixed-side upper belt sander, fixed-side lower belt sander, movable-side upper belt sander, and movable-side lower belt sander have the same structure, including a drive wheel, a driven wheel, a sanding belt, a cylinder, a telescopic connecting rod, and a bracket; the drive wheel and the driven wheel are arranged parallel to each other on their rotation axes and are connected by the telescopic connecting rod; the sanding belt is wrapped around the drive wheel and the driven wheel, forming a conveyor belt-like structure; the drive wheel and its drive mechanism are installed at the bottom of the bracket, the cylinder is installed at the top of the bracket, and the output end of the cylinder is connected to the telescopic connecting rod.

[0007] Furthermore, the driven wheel is in a free cantilever state, and the driving wheel and its drive mechanism are hinged; when the output end of the cylinder pushes the telescopic connecting rod, it drives the driven wheel and the telescopic connecting rod to rotate together around the connection point of the driving wheel; in standby and working states, the telescopic connecting rod is in an extended state and the sanding belt is in a tensioned state; when the telescopic connecting rod is in a retracted state, the sanding belt can be quickly replaced.

[0008] Furthermore, to ensure that the sanding belt has sufficient rotational speed, the diameter of the driving wheel is larger than the diameter of the driven wheel.

[0009] Furthermore, the cylinder is hinged to the bracket, and the output end of the cylinder is hinged to the telescopic connecting rod.

[0010] An automated method for treating primer on strip materials includes the following steps:

[0011] Step 1: Place the strip part flat on the conveyor rollers and control the strip part to be conveyed forward at a uniform speed in a straight line along the conveyor rollers by the guide wheel; when the front end of the strip part passes the sensor, control the vertical pressing wheel to press the strip part on the conveyor rollers, so that the strip part remains horizontal when it is partially suspended after being conveyed to the disconnected part of the conveyor rollers.

[0012] Step 2: When the front end of the strip part passes the moving side clamping wheel, the moving side paint remover moves towards the fixed side paint remover until the moving side clamping wheel is close to the edge of the strip part; at this time, the fixed side upper belt sander, the fixed side lower belt sander, the moving side upper belt sander, and the moving side lower belt sander are just aligned with the four areas to be removed on the two long sides of the strip part.

[0013] Step 3: When the front end of the strip part exceeds the distance of the moving side clamping wheel L1, control the conveyor roller to reverse the transmission and drive the strip part to move backward; at the same time, control the fixed side upper belt sander, fixed side lower belt sander, moving side upper belt sander and moving side lower belt sander to press the strip part and grind and remove paint from the strip part.

[0014] Step 4: When the front end of the strip part exits the working range of the moving side paint remover and the fixed side paint remover, but does not leave the sensor detection range, control the conveyor roller to move forward at a constant speed, and drive the strip part forward to re-enter the working range of the moving side paint remover and the fixed side paint remover.

[0015] Step 5: When the front end of the strip part exceeds the distance L2 of the moving side clamping wheel, control the fixed side upper belt sander, fixed side lower belt sander, moving side upper belt sander and moving side lower belt sander to tighten the strip part, and grind and remove paint from the strip part again.

[0016] Step 6: When the tail end of the strip part leaves the working range of the moving side paint remover and the fixed side paint remover, the sanding and paint removal of the entire strip part is completed.

[0017] Furthermore, the output end of the cylinder pushes the telescopic connecting rod, causing the telescopic connecting rod to drive the driven wheel to rotate around the connection point of the driving wheel, so that the sanding belt rotating around the driven wheel comes into contact with the strip part, and the sanding belt in a high-speed rotating state removes the primer on the surface of the strip part; when the output end of the cylinder retracts, the driven wheel is lifted off the strip part.

[0018] Furthermore, to ensure the continuity of paint removal for strip parts, L2 < L1.

[0019] Furthermore, the fixed-side paint remover and the mobile-side paint remover are built into a closed space and equipped with a dust removal device. Only the front and rear inlets and outlets are connected to the outside world to ensure the smooth transmission of strip parts. When sanding begins, the dust removal device starts simultaneously and stops after sanding ends, thus collecting primer dust and reducing sanding noise.

[0020] The beneficial effects of this invention are as follows:

[0021] The automatic primer treatment system for marine strip parts provided by this invention can automatically adapt to different specifications of marine strip parts, including thickness, width, and length, and can also automatically adapt to warping and deformation of the strip parts. Before sanding begins, there is no need to input the strip specifications; the belt sander can automatically find the area to be sanded and can cover the ends of the strip, ensuring thorough sanding without blind spots, reducing manual intervention, and improving paint removal efficiency. Compared to traditional paint removal methods, this invention achieves simultaneous automatic paint removal from four sanding areas of the strip part, without the need to flip the strip during the process. The conveyor rollers drive the strip part forward or backward at a uniform speed, and the belt sander rotates at a uniform speed. The pressure between the belt sander and the strip part is relatively constant, resulting in stable sanding and paint removal effects without damaging the base material of the strip part. A single paint removal operation is sufficient to meet quality requirements, eliminating the need for repeated sanding. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the automatic strip primer treatment system of the present invention.

[0023] Figure 2 This is a forward schematic diagram of the automatic strip primer treatment system of the present invention.

[0024] Figure 3 This is a schematic diagram of the automatic strip primer treatment system in this invention.

[0025] Figure 4 This is a schematic diagram of the working vertical direction of the automatic strip primer treatment system in this invention.

[0026] Figure 5 This is a side view schematic diagram of the automatic strip primer treatment system in this invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] Conveying platform 1, conveying roller 11, pressing roller 12, sensor 2, fixed side paint remover 3, moving side paint remover 4, moving side upper belt sander 41, driving wheel 411, driven wheel 412, sanding belt 413, cylinder 414, telescopic connecting rod 415, transverse slider 416, bracket 417, moving side lower belt sander 42, moving side pressing roller 43, strip parts 6. Detailed Implementation

[0029] The present invention will now be further described with reference to the accompanying drawings.

[0030] This invention provides an automatic edge primer treatment system for ship hull structural strip parts, such as... Figure 1 , Figure 2As shown, it includes a conveyor platform 1, a sensor 2, a fixed-side paint remover 3, and a mobile-side paint remover 4.

[0031] An automatic strip primer treatment system includes a conveying platform 1, a fixed-side paint remover 3, and a movable-side paint remover 4. The conveying platform 1 includes a conveying roller conveyor 11, with guide wheels 13 evenly distributed along the conveying direction on one side of the conveying roller conveyor 11. The conveying roller conveyor 11 is divided into two sections in the middle. A first transverse guide rail is provided above the rear end of the front section, and a second transverse guide rail and a third transverse guide rail are provided above and below the front end of the rear section, respectively. A pressure wheel slider is provided on the first transverse guide rail, and a vertical pressure wheel 12 and a sensor 2 are installed below the pressure wheel slider. The fixed-side paint remover 3 includes a fixed-side upper belt sander and a fixed-side lower belt sander. The mobile side paint removal machine 4 includes a mobile side upper belt sander 41, a mobile side lower belt sander 42, and a mobile side clamping wheel 43; the fixed side upper belt sander is fixedly installed on the side of the second transverse guide rail near the guide wheel 13; the fixed side lower belt sander is fixedly installed on the side of the third transverse guide rail near the guide wheel 13; the mobile side upper belt sander 41 and the mobile side lower belt sander 42 are respectively installed on the second transverse guide rail and the third transverse guide rail via transverse sliding blocks 416, and the mobile side upper belt sander 41 and the mobile side lower belt sander 42 are connected by a longitudinal guide rail and move synchronously; the mobile side clamping wheel 43 is installed on the longitudinal guide rail via a longitudinal sliding block.

[0032] The conveyor platform 1 is arranged horizontally for conveying the strip parts 6 forward or backward. The clamping rollers 12 are used to firmly press the conveyed strip parts 6 downward onto the conveyor rollers 11 to ensure the stability of the strip parts 6 during conveying and primer treatment. The sensor 2 is used to detect and determine the relative position of the strip parts 6 conveyed on the conveyor platform 1 during forward or backward movement. A proximity switch sensor can be used.

[0033] The fixed-side paint remover 3 is used to remove the shop primer from the upper and lower surfaces of one edge of the strip part 6. The paint removal working surface of the fixed-side paint remover 3 is matched with the conveying surface of the conveying platform 1. The movable-side paint remover 4 is used to remove the shop primer from the upper and lower surfaces of the other edge of the strip part 6. The paint removal working surface of the movable-side paint remover 4 is matched with the conveying surface of the conveying platform 1. The movable-side paint remover 4 can be moved as a whole to the left or right while maintaining a horizontal working plane to accommodate strip parts 6 of different widths.

[0034] The fixed-side upper sander and the movable-side upper sander 41 are arranged on the upper side of the working surface of the conveyor roller 11 and have the function of vertical adjustment. When not working, the fixed-side upper sander and the movable-side upper sander 41 are in the upward open state. When working, the fixed-side upper sander and the movable-side upper sander 41 are tightly pressed downward on the upper side of the strip part 6 located on the conveyor roller 11. At this time, the sanding belt on the fixed-side upper sander and the movable-side upper sander 41 is in a rotating state and is in contact with the upper surface of the strip part 6.

[0035] The fixed-side lower sander and the movable-side lower sander 42 are arranged on the lower side of the working surface of the conveyor roller 11 and have the function of vertical adjustment. When not in operation, the fixed-side lower sander and the movable-side lower sander 42 are in the downward open state. When in operation, the fixed-side lower sander and the movable-side lower sander 42 are tightly pressed down on the lower side of the strip part 6 located on the working surface of the conveyor roller 11. At this time, the sanding belt on the fixed-side lower sander and the movable-side lower sander 42 is in a rotating state and is in contact with the lower surface of the strip part 6.

[0036] During system configuration, the movement range and relative positions of the fixed-side upper belt sander, fixed-side lower belt sander, and moving-side upper belt sander 41 and lower belt sander 42 are limited according to the thickness variation range of the strip part 6. This ensures that all four belt sanders can simultaneously contact the strip part 6 to remove the shop primer, while also ensuring that when the strip part 6 is not within the range of the belt sanders, there is still a certain safety gap between the fixed-side upper belt sander when it is pressed down to its limit position and the fixed-side lower belt sander when it is pressed up to its limit position. Similarly, there is still a certain safety gap between the moving-side upper belt sander 41 when it is pressed down to its limit position and the moving-side lower belt sander 42 when it is pressed up to its limit position.

[0037] The fixed-side upper belt sander, the fixed-side lower belt sander, the movable-side upper belt sander 41, and the movable-side lower belt sander 42 have the same structure, such as... Figure 3As shown, it includes a drive wheel 411, a driven wheel 412, a sanding belt 413, a cylinder 414, a telescopic connecting rod 415, and a bracket 417. The drive wheel 411 and the driven wheel 412 are arranged parallel to each other on their rotation axes and are connected by the telescopic connecting rod 415. The sanding belt 413 is wrapped around the drive wheel 411 and the driven wheel 412, forming a conveyor belt-like structure. The drive wheel 411 and its drive mechanism are installed at the bottom of the bracket 417, and the cylinder 414 is installed on the upper part of the bracket 417. The output end of the cylinder 414 is connected to the telescopic connecting rod 415. Driven wheel 412 is in a free cantilever state, and driving wheel 411 is hingedly connected to its drive mechanism. When the output end of cylinder 414 pushes telescopic connecting rod 415, it drives driven wheel 412 and telescopic connecting rod 415 to rotate together around the connection point of driving wheel 411. In standby and working states, telescopic connecting rod 415 is in an extended state, and sanding belt 413 is in a tensioned state. When telescopic connecting rod 415 is in a retracted state, sanding belt 413 can be quickly replaced. To ensure that sanding belt 413 has sufficient rotational speed, the diameter of driving wheel 411 is designed to be larger than the diameter of driven wheel 412. The upper end of cylinder 414 is hingedly connected to bracket 417, which can move laterally synchronously with transverse slider 416. The lower side of cylinder 414 is hingedly connected to telescopic connecting rod 415. By extending or retracting cylinder 414, driven wheel 412 is moved downward or upward to achieve the purpose of pressing and lifting.

[0038] Through structural design, when the cylinder 414 is in the extended state, the lower working end of the driven wheel 412 can contact the strip part 6, and the sanding belt 413, which is rotating at high speed, can remove the primer from the surface of the strip part 6. When the cylinder 414 is in the retracted state, the driven wheel 412 is lifted off the strip part 6. The design principles of the fixed-side lower sander, the fixed-side upper sander, and the movable-side lower sander 42 are similar to those of the movable-side upper sander 41.

[0039] The control module is used to control the forward or backward rotation of the conveyor roller 11; control the pressing or lifting of the vertical clamping wheel 12; receive signals from the sensor 2 and determine the position of the end of the strip part 6 according to the circumference and rotation speed of the conveyor roller 11; control the rotation, tightening or lifting of the fixed-side upper belt sander, fixed-side lower belt sander, moving-side upper belt sander 41, and moving-side lower belt sander 42; and control the moving-side paint remover 4 to move closer to or away from the fixed-side paint remover 3.

[0040] This invention allows the paint removal machine module to automatically adapt to changes in the length and flatness of strip parts, that is, to automatically adapt to the common situation of warping at the ends of strip parts without manual intervention.

[0041] This invention can effectively avoid the problems of poor end grinding quality of strip parts, the need for manual re-grinding, and damage to the base material of strip parts due to excessive grinding.

[0042] An automated method for treating primer on strip materials includes the following steps:

[0043] Step 1: As Figure 4 , Figure 5 As shown, the strip part 6 is placed flat on the conveyor roller 11, with one long side of the strip part 6 pressed against the longitudinal guide wheel 13, and the short front side of the strip part 6 outside the vertical clamping wheel 12. The guide wheel 13 controls the strip part 6 to be conveyed forward at a uniform speed in a straight line along the conveyor roller 11; when the front end of the strip part 6 passes the sensor 2, the vertical clamping wheel 12 is controlled to press the strip part 6 against the conveyor roller 11, so that after the strip part 6 is conveyed to the disconnected part of the conveyor roller 11, the strip part 6 still maintains a horizontal posture when it is partially suspended in the air;

[0044] Step 2: When the front end of the strip part 6 passes the moving side clamping wheel 43, the moving side paint remover 4 moves towards the fixed side paint remover 3 until the moving side clamping wheel 43 is close to the edge of the strip part 6; at this time, the fixed side upper belt sander, the fixed side lower belt sander, the moving side upper belt sander 41 and the moving side lower belt sander 42 are just aligned with the four paint-removing areas on the two long sides of the strip part 6.

[0045] Step 3: When the front end of the strip part 6 exceeds the distance of the moving side clamping wheel L1, control the conveyor roller 11 to reverse the transmission and drive the strip part 6 to move backward; at the same time, control the fixed side upper sander, fixed side lower sander, moving side upper sander 41 and moving side lower sander 42 to press the strip part 6 and grind and remove paint from the strip part 6.

[0046] Step 4: When the front end of the strip part 6 exits the working range of the moving side paint remover 4 and the fixed side paint remover 3, but does not leave the detection range of the sensor 2, control the conveyor roller 11 to move forward at a uniform speed, and drive the strip part 6 forward to re-enter the working range of the moving side paint remover 4 and the fixed side paint remover 3.

[0047] Step 5: When the front end of the strip part 6 exceeds the distance L2 of the moving side clamping wheel, control the fixed side upper belt sander, fixed side lower belt sander, moving side upper belt sander 41 and moving side lower belt sander 42 to tighten the strip part 6, and grind and remove paint from the strip part 6 again; to ensure the continuity of paint removal, L2 < L1.

[0048] Step 6: When the tail end of strip part 6 leaves the working range of the moving side paint remover 4 and the fixed side paint remover 3, the sanding and paint removal of the entire strip part 6 is complete. At this time, stop the sanding belt rotation, turn on the fixed side upper sander, fixed side lower sander, moving side upper sander 41, and moving side lower sander 42, and turn on the moving side paint remover 4. The system is now ready for the automatic sanding and paint removal of the next strip part.

[0049] The fixed-side paint remover 3 and the mobile-side paint remover 4 can be built into a glass room and equipped with a dust removal device. Only the front and rear inlets and outlets are connected to the outside, ensuring the smooth transmission of strip parts 6. When sanding starts, the dust removal device starts simultaneously, and after sanding ends, the dust removal device stops, automatically collecting primer dust and reducing sanding noise.

[0050] To ensure the quality of paint removal from strip parts, while avoiding damage to the base material caused by the paint remover briefly stopping at a certain position on the strip part, the control module must ensure that the conveyor rollers are already moving the strip part forward or backward at the moment when the fixed-side upper and lower belt sanders, the moving-side upper and lower belt sanders are tightening the strip part. This is a dynamic process, and it is best to avoid tightening the strip part at the moment before it is being conveyed.

[0051] The automatic primer removal system for marine strips provided by this invention can automatically adapt to different specifications of marine strip parts, including thickness, width, and length, and can automatically adapt to the warping and deformation of the strip parts, making it suitable for practical engineering applications. Before starting sanding, there is no need to input the strip specifications; the belt sander can automatically find the area to be sanded, reducing manual intervention and improving paint removal efficiency. Compared to traditional paint removal methods, this invention achieves simultaneous automatic paint removal from four sanding areas of the strip part, without the need to flip the strip during the process. The conveyor rollers drive the strip part forward or backward at a uniform speed, and the belt sander rotates at a uniform speed. The clamping force between the belt sander and the strip part is relatively constant, resulting in stable sanding and paint removal effects without damaging the base material. Quality requirements can be met in one coat of paint, eliminating the need for repeated sanding. This automatic primer removal system for marine strips produces no dust and generates minimal noise during the primer removal process.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic primer treatment system for strip materials, characterized in that: The system includes a conveyor platform (1), a fixed-side paint remover (3), and a mobile-side paint remover (4). The conveyor platform (1) includes a conveyor roller conveyor (11), with guide wheels (13) evenly distributed along the conveying direction on one side of the conveyor roller conveyor (11). The conveyor roller conveyor (11) is split in the middle into two sections, with a first transverse guide rail above the rear end of the front section and a second transverse guide rail above and below the front end of the rear section, respectively. A pressure wheel slider is provided on the first transverse guide rail, and a vertical pressure wheel (12) and a sensor (2) are installed below the pressure wheel slider. The fixed-side paint remover (3) includes a fixed-side upper belt sander and a fixed-side lower belt sander. The mobile-side paint remover (4) The system includes a movable upper belt sander (41), a movable lower belt sander (42), and a movable side clamping wheel (43). The fixed upper belt sander is fixedly installed on the side of the second transverse guide rail near the guide wheel (13). The fixed lower belt sander is fixedly installed on the side of the third transverse guide rail near the guide wheel (13). The movable upper belt sander (41) and the movable lower belt sander (42) are respectively installed on the second transverse guide rail and the third transverse guide rail via transverse sliding blocks (416). The movable upper belt sander (41) and the movable lower belt sander (42) are connected by a longitudinal guide rail and move synchronously. The movable side clamping wheel (43) is installed on the longitudinal guide rail via a longitudinal sliding block. The fixed-side upper belt sander, fixed-side lower belt sander, mobile-side upper belt sander (41), and mobile-side lower belt sander (42) have the same structure, including a drive wheel (411), a driven wheel (412), a sanding belt (413), a cylinder (414), a telescopic connecting rod (415), and a bracket (417). The drive wheel (411) and the driven wheel (412) are arranged parallel to each other on their rotation axis and are connected by the telescopic connecting rod (415). The sanding belt (413) is wrapped around the drive wheel (411) and the driven wheel (412) to form a conveyor belt-like structure. The drive wheel (411) and its drive mechanism are installed at the bottom of the bracket (417), and the cylinder (414) is installed on the upper part of the bracket (417). The output end of the cylinder (414) is connected to the telescopic connecting rod (415). The driven wheel (412) is in a free cantilever state, and the driving wheel (411) is hinged to its driving mechanism. When the output end of the cylinder (414) pushes the telescopic connecting rod (415), it drives the driven wheel (412) and the telescopic connecting rod (415) to rotate together around the connection point of the driving wheel (411). In standby and working states, the telescopic connecting rod (415) is in an extended state, and the sanding belt (413) is in a tensioned state. When the telescopic connecting rod (415) is in a retracted state, the sanding belt (413) can be quickly replaced.

2. The automatic strip primer treatment system according to claim 1, characterized in that: To ensure that the sand belt (413) has sufficient rotational speed, the diameter of the driving wheel (411) is larger than the diameter of the driven wheel (412).

3. The automatic strip primer treatment system according to claim 1, characterized in that: The cylinder (414) is hinged to the bracket (417), and the output end of the cylinder (414) is hinged to the telescopic connecting rod (415).

4. An automatic treatment method for strip primer based on the automatic strip primer treatment system of claim 1, characterized in that, Includes the following steps: Step 1: Place the strip part (6) flat on the conveyor roller (11), and control the strip part (6) to move forward at a constant speed in a straight line along the conveyor roller (11) by the guide wheel (13); when the front end of the strip part (6) passes the sensor (2), control the vertical pressing wheel (12) to press the strip part (6) on the conveyor roller (11), so that after the strip part (6) is conveyed to the disconnected part of the conveyor roller (11), the strip part (6) still maintains a horizontal posture when it is partially suspended in the air; Step 2: When the front end of the strip part (6) passes the moving side pressing wheel (43), the moving side paint remover (4) moves towards the fixed side paint remover (3) until the moving side pressing wheel (43) presses against the edge of the strip part (6); at this time, the fixed side upper belt sander, the fixed side lower belt sander, the moving side upper belt sander (41) and the moving side lower belt sander (42) are aligned with the four paint-removing areas on the two long sides of the strip part (6); Step 3: When the front end of the strip part (6) exceeds the distance L1 of the moving side clamping wheel (43), control the conveyor roller (11) to reverse the transmission and drive the strip part (6) to move backward; at the same time, control the fixed side upper sander, fixed side lower sander, moving side upper sander (41) and moving side lower sander (42) to press the strip part (6) and grind and remove paint from the strip part (6); Step 4: When the front end of the strip part (6) exits the working range of the moving side paint remover (4) and the fixed side paint remover (3), but does not leave the detection range of the sensor (2), control the conveyor roller (11) to move forward at a uniform speed, and drive the strip part (6) forward to re-enter the working range of the moving side paint remover (4) and the fixed side paint remover (3). Step 5: When the front end of the strip part (6) exceeds the distance L2 of the moving side clamping wheel (43), control the fixed side upper belt sander, fixed side lower belt sander, moving side upper belt sander (41) and moving side lower belt sander (42) to press the strip part (6) and grind and remove paint from the strip part (6) again. Step 6: When the tail end of the strip part (6) leaves the working range of the moving side paint remover (4) and the fixed side paint remover (3), the sanding and paint removal of the entire strip part (6) is completed.

5. The automatic treatment method for strip primer according to claim 4, characterized in that: The output end of the cylinder (414) pushes the telescopic connecting rod (415), causing the telescopic connecting rod (415) to drive the driven wheel (412) to rotate around the connection point of the driving wheel (411), so that the sanding belt (413) rotating around the driven wheel (412) comes into contact with the strip part (6), and the sanding belt (413) in high-speed rotation removes the primer from the surface of the strip part (6); when the output end of the cylinder (414) retracts, the driven wheel (412) is lifted off the strip part (6).

6. The automatic treatment method for strip primer according to claim 4, characterized in that: To ensure the continuity of paint removal for strip parts (6), L2 < L1.

7. The automatic treatment method for strip primer according to claim 4, characterized in that: The fixed-side paint remover (3) and the mobile-side paint remover (4) are built into a closed space and equipped with a dust removal device. Only the front and rear inlets and outlets are connected to the outside world to ensure the smooth transmission of strip parts (6). When grinding begins, the dust removal device starts synchronously. After grinding ends, the dust removal device stops, realizing the collection of primer dust and the reduction of grinding noise.

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