Automatic strip primer treatment system and method

Abstract

The invention belongs to the technical field of ship manufacturing, and particularly relates to an automatic strip primer treatment system and method. The automatic strip primer treatment system provided by the invention can automatically adapt to marine strip parts of different specifications, including thickness, width, length and the like, can automatically adapt to buckling deformation of the strip parts, and is more suitable for engineering application. Before polishing is started, the belt sander can automatically find the to-be-polished area without inputting the specifications of the strip materials, manual intervention is reduced, and the paint removing efficiency is improved. Compared with a traditional paint removal method, the automatic paint removal device achieves simultaneous automatic paint removal of the polishing areas of the four edges of the strip part, the head end and the tail end can be covered, dead-corner-free polishing is achieved, and the strip does not need to be turned over in the process. The conveying roller way drives the strip parts to move forwards or backwards at a constant speed, the belt sander rotates at a constant speed, and the pressing force between the belt sander and the strip parts is relatively constant, so that the polishing and paint removing effect is stable, base metal is not damaged, the quality requirement can be met through one-time paint removing, and repeated paint removing is not needed.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to an automatic strip primer processing system and method. Background Art

[0002] In the manufacture of hull structures, strips are cut from steel plates and are rectangular in shape. They are very important intermediate product basic parts in the manufacture of hull structures. In order to prevent rust on the surface of the strips during the long-term manufacturing process of the structure, shop primer is sprayed on the upper and lower surfaces of the steel plates in the pretreatment stage before the steel plates are cut. Therefore, the surface of the strips formed after the steel plates are cut is also covered with shop primer protection. Before the next process of strip assembly and assembly welding begins, the shop primer in the welding area of ​​the upper and lower surfaces of the two long sides of the strips needs to be removed to ensure the quality of the welds.

[0003] The surface of marine steel has a certain degree of roughness, and the adhesion between the workshop primer and the strip is strong. In the traditional manufacturing process, the workshop primer removal in the strip welding area requires the strip to be laid flat on the steel platform on the workshop floor, and the grinding worker uses a handheld grinder or a hand-pushed sanding machine to grind and remove the primer. Because the grinding wheel and the sanding belt will vibrate when they come into contact with the surface of the steel strip during high-speed rotation, it is difficult for the grinder to control the handheld device and the polished strip to maintain a relatively stable optimal angle, a relatively constant contact force, and a relatively uniform travel speed, which makes it difficult to remove the primer. During the construction process, the same position needs to be repeatedly removed many times before it can be removed cleanly, and the upper and lower surfaces corresponding to the two long sides of the strip, that is, the primer removal of the four surfaces, need to be carried out one by one, and after the upper surface treatment is completed, the strip needs to be turned over before the primer on the lower surface can be treated. Therefore, the traditional strip primer removal method has problems such as uneven primer treatment, easy damage to the parent material, low paint removal efficiency, and high work intensity. Summary of the invention

[0004] The purpose of the present invention is to provide a strip primer automatic processing system and method, which is used to achieve rapid, uniform and high-quality removal of strip primer on welding surface, and solve the problems of low strip primer removal efficiency and poor consistency in traditional methods.

[0005] An automatic strip primer processing system comprises a conveying platform, a fixed-side paint stripper and a mobile-side paint stripper; the conveying platform comprises a conveying roller, guide wheels are evenly distributed along the conveying direction on one side of the conveying roller, the conveying roller is broken in the middle into two sections, a front section and a rear section, a first transverse guide rail is arranged above the rear end of the front section, and a second transverse guide rail and a third transverse guide rail are arranged above and below the front end of the rear section respectively; a pressure wheel slider is arranged 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 stripper comprises a fixed-side upper sanding belt machine and a fixed-side lower sanding belt machine Machine; the mobile side paint removal machine includes an upper sanding belt machine on the mobile side, a lower sanding belt machine on the mobile side and a mobile side tension wheel; the upper sanding belt machine on the fixed side is fixedly installed on the side of the second transverse guide rail close to the guide wheel; the lower sanding belt machine on the fixed side is fixedly installed on the side of the third transverse guide rail close to the guide wheel; the upper sanding belt machine on the mobile side and the lower sanding belt machine on the mobile side are respectively installed on the second transverse guide rail and the third transverse guide rail through a transverse slider, and the upper sanding belt machine on the mobile side and the lower sanding belt machine on the mobile side are connected by a longitudinal guide rail and move synchronously; the mobile side tension wheel is installed on the longitudinal guide rail through a longitudinal slider.

[0006] Furthermore, the upper sanding machine on the fixed side, the lower sanding machine on the fixed side, the upper sanding machine on the movable side and the lower sanding machine on the movable side have the same structure, including a driving wheel, a driven wheel, a sanding belt, a cylinder, a telescopic connecting rod and a bracket; the driving wheel and the driven wheel are arranged parallel to the rotation axis and are connected by a telescopic connecting rod; the sanding belt is wrapped around the driving wheel and the driven wheel to form a conveyor belt-like structure; the driving wheel and its driving mechanism are installed at the bottom of the bracket, the cylinder is installed on the upper part 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 driving mechanism are hingedly connected; when the output end of the cylinder pushes the telescopic connecting rod, the driven wheel and the telescopic connecting rod are driven to rotate around the connection point of the driving wheel; in the 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 contracted state, the sanding belt can be quickly replaced.

[0008] Furthermore, to ensure that the abrasive belt has a sufficient rotation speed, the diameter of the driving wheel is greater than the diameter of the driven wheel.

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

[0010] A strip primer automatic treatment method comprises the following steps:

[0011] Step 1: Place the strip parts flat on the conveyor roller, and control the strip parts to be transported forward along the conveyor roller at a uniform speed in a straight line through the guide wheel; when the front end of the strip parts passes the sensor, control the vertical pressing wheel to press the strip parts against the conveyor roller, so that after the strip parts are transferred to the disconnected part of the conveyor roller, the strip parts still maintain a horizontal posture when they are partially suspended;

[0012] Step 2: When the front end of the strip part passes the moving side tension wheel, the moving side paint stripper moves toward the fixed side paint stripper until the moving side tension wheel is close to the edge of the strip part; at this time, the fixed side upper belt machine, the fixed side lower belt machine, the moving side upper belt machine and the moving side lower belt machine are just aligned with the four paint stripping areas on the two long sides of the strip part;

[0013] Step 3: When the front end of the strip part exceeds the distance L1 of the moving side tension wheel, the conveyor roller is controlled to transmit in the reverse direction to drive the strip part to move backward; at the same 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 controlled to press the strip part to grind and remove the paint from the strip part;

[0014] Step 4: When the front end of the strip part exits the working range of the mobile side paint stripper and the fixed side paint stripper but does not leave the sensor detection range, the conveyor roller is controlled to transport forward at a uniform speed, driving the strip part forward to re-enter the working range of the mobile side paint stripper and the fixed side paint stripper;

[0015] Step 5: When the front end of the strip part exceeds the distance L2 of the moving side tightening wheel, the fixed side upper sanding machine, the fixed side lower sanding machine, the moving side upper sanding machine and the moving side lower sanding machine are controlled to tighten the strip part, and the strip part is polished and painted again;

[0016] Step 6: When the tail end of the strip part leaves the working range of the mobile side paint stripping machine and the fixed side paint stripping machine, the grinding and paint stripping of the entire strip part is completed.

[0017] Furthermore, the output end of the cylinder pushes the telescopic connecting rod, so that the telescopic connecting rod drives the driven wheel to rotate around the connection point of the driving wheel, so that the sanding belt rotating around the driven wheel contacts 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 is retracted, the driven wheel is lifted from the strip part.

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

[0019] Furthermore, the fixed-side paint remover and the mobile-side paint remover are built into a closed space and are equipped with dust removal devices. Only the front and rear entrances and exits are connected to the outside world to ensure the smooth transmission of strip parts. When grinding starts, the dust removal device starts synchronously. After grinding, the dust removal device stops to collect primer dust and reduce grinding noise.

[0020] The beneficial effects of the present invention are:

[0021] The strip primer automatic processing system provided by the present invention can automatically adapt to different specifications of marine strip parts, including thickness, width and length, etc., and can automatically adapt to the warping deformation of strip parts, etc., and before starting to grind, there is no need to input the strip specifications, the belt sander can automatically find the area to be grinded, and can cover the end of the strip, and there is no dead angle in the grinding, which reduces manual intervention and improves the paint removal efficiency. Compared with the traditional paint removal method, the present invention realizes the automatic paint removal of four grinding areas of the strip parts at the same time, and there is no need to turn the strip over during the process. The strip parts are driven forward or backward at a constant speed by the conveyor roller, and the belt sander rotates at a constant speed. The pressing force between the belt sander and the strip parts is relatively constant, so that the grinding and paint removal effect is stable, and the parent material of the strip parts is not damaged. The paint removal can meet the quality requirements in one time without repeated removal. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0024] Figure 3 It is a working schematic diagram of the strip primer automatic processing system of the present invention.

[0025] Figure 4 It is a vertical schematic diagram of the working of the automatic strip primer processing system of the present invention.

[0026] Figure 5 It is a schematic side view of the working of the automatic strip primer processing system of the present invention.

[0027] Description of reference numerals:

[0028] Conveying platform 1, conveying roller 11, pressure wheel 12, sensor 2, fixed side paint remover 3, mobile side paint remover 4, mobile side upper belt sander 41, driving wheel 411, driven wheel 412, sanding belt 413, cylinder 414, telescopic connecting rod 415, transverse sliding block 416, bracket 417, mobile side lower belt sander 42, mobile side pressure wheel 43, strip part 6. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

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

[0031] An automatic strip primer processing system includes a conveying platform 1, a fixed-side paint stripper 3 and a mobile-side paint stripper 4; the conveying platform 1 includes a conveying roller 11, guide wheels 13 are evenly distributed along the conveying direction on one side of the conveying roller 11, the conveying roller 11 is broken in the middle into two sections, a first transverse guide rail is arranged above the rear end of the front section, and a second transverse guide rail and a third transverse guide rail are arranged above and below the front end of the rear section respectively; a pressure wheel slider is arranged 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 stripper 3 includes a fixed-side upper sanding belt machine and a fixed-side lower sanding belt machine; The mobile side paint remover 4 includes an upper sanding belt machine 41 on the mobile side, a lower sanding belt machine 42 on the mobile side and a mobile side tension wheel 43; the upper sanding belt machine on the fixed side is fixedly installed on the side of the second transverse guide rail close to the guide wheel 13; the lower sanding belt machine on the fixed side is fixedly installed on the side of the third transverse guide rail close to the guide wheel 13; the upper sanding belt machine 41 on the mobile side and the lower sanding belt machine 42 on the mobile side are respectively installed on the second transverse guide rail and the third transverse guide rail through a transverse slider 416, and the upper sanding belt machine 41 on the mobile side and the lower sanding belt machine 42 on the mobile side are connected by a longitudinal guide rail and move synchronously; the mobile side tension wheel 43 is installed on the longitudinal guide rail through a longitudinal slider.

[0032] The conveying platform 1 is arranged in the horizontal direction and is used to convey the strip parts 6 forward or backward. The clamping wheel 12 is used to press the conveyed strip parts 6 downward tightly on the conveying roller 11 to ensure the stability of the strip parts 6 during the conveying and primer treatment process. The sensor 2 is used to detect and determine the relative position of the strip parts 6 conveyed on the conveying platform 1 during the forward or backward process, and a proximity switch sensor can be used.

[0033] The fixed-side paint stripper 3 is used to remove the shop primer on the upper and lower surfaces of one side edge of the strip part 6, and the paint stripping working surface of the fixed-side paint stripper 3 matches the conveying surface of the conveying platform 1. The mobile-side paint stripper 4 is used to remove the shop primer on the upper and lower surfaces of the other side edge of the strip part 6, and the paint stripping working surface of the mobile-side paint stripper 4 matches the conveying surface of the conveying platform 1. The mobile-side paint stripper 4 can be moved to the left or right as a whole while keeping the horizontal working plane unchanged to adapt to strip parts 6 of different widths.

[0034] The fixed side upper belt sander and the movable side upper belt sander 41 are arranged on the upper side of the working surface of the conveyor roller 11 and have the function of up and down adjustment. When not working, the fixed side upper belt sander and the movable side upper belt sander 41 are in an upwardly opened state. When working, the fixed side upper belt sander and the movable side upper belt 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 belts on the fixed side upper belt sander and the movable side upper belt sander 41 are in a rotating state and in contact with the upper surface of the strip part 6.

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

[0036] When configuring the system, the moving range and relative position of the fixed side upper belt sander, the fixed side lower belt sander, the mobile side upper belt sander 41, and the mobile side lower belt sander 42 are limited according to the thickness variation range of the strip part 6, that is, to ensure that the four belt sanders can contact the strip part 6 at the same time to remove the shop primer, and at the same time, to ensure that when the strip part 6 is not within the range of the belt sander, when the fixed side upper belt sander is pressed downward to the limit position, and when the fixed side lower belt sander is pressed upward to the limit position, there is still a certain safety gap between the two. Similarly, when the mobile side upper belt sander 41 is pressed downward to the limit position, and when the mobile side lower belt sander 42 is pressed upward to the limit position, there is still a certain safety gap between the two.

[0037] The fixed side upper belt machine, the fixed side lower belt machine, the movable side upper belt machine 41 and the movable side lower belt machine 42 have the same structure. Figure 3As shown, it includes a driving wheel 411, a driven wheel 412, a sanding belt 413, a cylinder 414, a telescopic connecting rod 415 and a bracket 417; the driving wheel 411 and the driven wheel 412 are arranged parallel to the rotation axis, and are connected by the telescopic connecting rod 415; the sanding belt 413 is wrapped around the driving wheel 411 and the driven wheel 412 to form a conveyor belt-like structure; the driving wheel 411 and its driving mechanism are installed at the bottom of the bracket 417, the cylinder 414 is installed on the upper part of the bracket 417, and 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 connected to its driving mechanism by a hinge. When the output end of the cylinder 414 pushes the telescopic link 415, the driven wheel 412 and the telescopic link 415 are driven to rotate around the connection point of the driving wheel 411. In the standby and working states, the telescopic link 415 is in an extended state, and the sanding belt 413 is in a tensioned state. When the telescopic link 415 is in a contracted state, the sanding belt 413 can be quickly replaced. In order to ensure that the sanding belt 413 has a sufficient rotation speed, the diameter of the driving wheel 411 is designed to be larger than the diameter of the driven wheel 412. The upper end of the cylinder 414 is hingedly connected to the bracket 417 that can move laterally synchronously with the transverse slider 416, and the lower side of the cylinder 414 is hingedly connected to the telescopic link 415. Through the extension or contraction of the cylinder 414, the driven wheel 412 is driven to move downward or upward to achieve the purpose of pressing and lifting.

[0038] By structural preset, 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 in the high-speed rotating state can remove the primer on the surface of the strip part 6. When the cylinder 414 is in the contracted state, the driven wheel 412 is lifted on the strip part 6. The design principles of the fixed side lower sanding belt machine, the fixed side upper sanding belt machine, and the movable side lower sanding belt machine 42 are similar to the design principles of the movable side upper sanding belt machine 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 pressure wheel 12; receive the signal of 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 machine, the fixed side lower belt machine, the mobile side upper belt machine 41, and the mobile side lower belt machine 42; control the mobile side paint remover 4 to approach or move away from the fixed side paint remover 3.

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

[0041] The present invention can effectively avoid the problems of poor grinding quality of the end of a strip part, the need for manual re-grinding, and excessive grinding that damages the base material of the strip part.

[0042] A strip primer automatic treatment method comprises the following steps:

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

[0044] Step 2: When the front end of the strip part 6 passes the moving side tension wheel 43, the moving side paint stripping machine 4 moves toward the fixed side paint stripping machine 3 until the moving side tension 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 stripping areas of the two long sides of the strip part 6;

[0045] Step 3: When the front end of the strip part 6 exceeds the distance L1 of the moving side tension wheel, the conveyor roller 11 is controlled to transmit in the reverse direction to drive the strip part 6 to move backward; at the same time, the fixed side upper sanding machine, the fixed side lower sanding machine, the moving side upper sanding machine 41 and the moving side lower sanding machine 42 are controlled to press the strip part 6 to grind and remove the paint from the strip part 6;

[0046] Step 4: When the front end of the strip part 6 exits the working range of the mobile side paint remover 4 and the fixed side paint remover 3, but does not leave the detection range of the sensor 2, the conveyor roller 11 is controlled to transport forward at a uniform speed, driving the strip part 6 forward to re-enter the working range of the mobile 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 tightening wheel, the fixed side upper sanding machine, the fixed side lower sanding machine, the moving side upper sanding machine 41 and the moving side lower sanding machine 42 are controlled to tighten the strip part 6, and the strip part 6 is polished and painted again; to ensure the continuity of paint removal, L2<L1.

[0048] Step 6: When the tail end of the strip part 6 leaves the working range of the mobile side paint stripper 4 and the fixed side paint stripper 3, the grinding and paint stripping of the entire strip part 6 is completed. At this time, the sanding belt is stopped, the fixed side upper sanding belt machine, the fixed side lower sanding belt machine, the mobile side upper sanding belt machine 41, the mobile side lower sanding belt machine 42 are turned on, and the mobile side paint stripper 4 is turned on. Then, the next strip part can be prepared for automatic grinding and paint stripping.

[0049] The fixed side paint remover 3 and the mobile side paint remover 4 can be built into the glass room and equipped with a dust removal device. Only the front and rear entrances and exits are connected to the outside world to ensure the smooth transmission of the strip parts 6. When grinding starts, the dust removal device starts synchronously. After grinding, the dust removal device stops, automatically collecting the primer dust and reducing the grinding noise.

[0050] To ensure the quality of paint removal of strip parts, and at the same time avoid the paint remover briefly staying at a certain position of the strip parts to work and causing the paint remover to damage the base material of the strip parts, at the moment when the control module controls the fixed side upper belt machine, the fixed side lower belt machine, the mobile side upper belt machine, and the mobile side lower belt machine to tighten the strip parts, it is necessary to ensure that the conveyor roller has driven the strip parts forward or backward in a transmission state, that is, it is a dynamic process, and try to avoid pressing at the moment when the strip parts are not transmitted.

[0051] The strip primer automatic processing system provided by the present invention can automatically adapt to marine strip parts of different specifications, including thickness, width and length, etc., and can automatically adapt to the warping deformation of strip parts, and is suitable for practical engineering applications. Before starting to polish, there is no need to input the strip specifications, and the belt sander can automatically find the area to be polished, reducing manual intervention and improving paint removal efficiency. Compared with the traditional paint removal method, the present invention realizes automatic paint removal of four polishing areas of strip parts at the same time, and there is no need to turn the strip over during the process. The strip parts are driven forward or backward at a constant speed by the conveyor roller, and the belt sander rotates at a constant speed. The pressing force between the belt sander and the strip parts is relatively constant, so that the polishing and paint removal effect is stable and does not damage the parent material. The quality requirements can be met by removing the paint once without repetition. The strip primer automatic processing system of the present invention is dust-free and low-noise during the primer removal process.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic strip primer processing system, characterized in that: The invention comprises a conveying platform (1), a fixed-side paint remover (3) and a movable-side paint remover (4); the conveying platform (1) comprises a conveying roller (11), guide wheels (13) are evenly distributed along the conveying direction on one side of the conveying roller (11), the conveying roller (11) is broken in the middle into two sections, front and rear, a first transverse guide rail is arranged above the rear end of the front section, and a second transverse guide rail and a third transverse guide rail are arranged above and below the front end of the rear section respectively; a pressure wheel slider is arranged 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) comprises a fixed-side upper sanding machine and a fixed-side lower sanding machine; the movable-side paint remover (4) ) comprises an upper sanding belt machine (41) on the mobile side, a lower sanding belt machine (42) on the mobile side and a tension wheel (43) on the mobile side; the upper sanding belt machine on the fixed side is fixedly mounted on the side of the second transverse guide rail close to the guide wheel (13); the lower sanding belt machine on the fixed side is fixedly mounted on the side of the third transverse guide rail close to the guide wheel (13); the upper sanding belt machine (41) on the mobile side and the lower sanding belt machine (42) on the mobile side are respectively mounted on the second transverse guide rail and the third transverse guide rail via a transverse sliding block (416); the upper sanding belt machine (41) on the mobile side and the lower sanding belt machine (42) on the mobile side are connected via a longitudinal guide rail and move synchronously; the tension wheel (43) on the mobile side is mounted on the longitudinal guide rail via a longitudinal sliding block.

2. The strip primer automatic processing system according to claim 1 is characterized in that: The fixed side upper sanding machine, the fixed side lower sanding machine, the movable side upper sanding machine (41) and the movable side lower sanding machine (42) have the same structure, comprising a driving wheel (411), a driven wheel (412), a sanding belt (413), a cylinder (414), a telescopic connecting rod (415) and a bracket (417); the driving wheel (411) and the driven wheel (412) are arranged parallel to the rotation axis and are connected by the telescopic connecting rod (415); the sanding belt (413) is wrapped between the driving wheel (411) and the driven wheel (412) to form a conveyor belt-like structure; the driving wheel (411) and its driving mechanism are installed at the bottom of the bracket (417), the cylinder (414) is installed at the upper part of the bracket (417), and the output end of the cylinder (414) is connected to the telescopic connecting rod (415).

3. The strip primer automatic processing system according to claim 2 is characterized in that: The driven wheel (412) is in a free cantilever state, and the driving wheel (411) and its driving mechanism are hingedly connected; when the output end of the cylinder (414) pushes the telescopic connecting rod (415), the driven wheel (412) and the telescopic connecting rod (415) are driven to rotate around the connection point of the driving wheel (411); in the 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 contracted state, the sanding belt (413) can be quickly replaced.

4. The strip primer automatic processing system according to claim 2 is characterized in that: To ensure that the sanding belt (413) has a sufficient rotation speed, the diameter of the driving wheel (411) is greater than the diameter of the driven wheel (412).

5. The strip primer automatic processing system according to claim 2 is characterized in that: The cylinder (414) is hingedly connected to the bracket (417), and the output end of the cylinder (414) is hingedly connected to the telescopic connecting rod (415).

6. An automatic strip primer processing method based on the strip primer automatic processing system according to claim 2, characterized in that: The following steps are involved: Step 1: Place the strip part (6) flat on the conveyor roller (11), and control the strip part (6) to be uniformly and linearly transported forward along the conveyor roller (11) by means of 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) onto the conveyor roller (11), so that after the strip part (6) is transferred 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 movable side tension wheel (43), the movable side paint stripping machine (4) moves toward the fixed side paint stripping machine (3) until the movable side tension wheel (43) is close to the edge of the strip part (6); at this time, the fixed side upper sanding machine, the fixed side lower sanding machine, the movable side upper sanding machine (41) and the movable side lower sanding machine (42) are just aligned with the four areas to be painted on the two long sides of the strip part (6); Step 3: When the front end of the strip part (6) exceeds the moving side tension wheel (43) by a distance of L1, the conveying roller (11) is controlled to transmit in the reverse direction, driving the strip part (6) to move backward; at the same time, the fixed side upper sanding machine, the fixed side lower sanding machine, the moving side upper sanding machine (41) and the moving side lower sanding machine (42) are controlled to press the strip part (6) to grind and remove the paint from the strip part (6); Step 4: When the front end of the strip part (6) exits the working range of the movable side paint remover (4) and the fixed side paint remover (3), but does not leave the detection range of the sensor (2), the conveyor roller (11) is controlled to transport forward at a uniform speed, driving the strip part (6) forward to re-enter the working range of the movable 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 tightening wheel (43), the fixed side upper sanding machine, the fixed side lower sanding machine, the moving side upper sanding machine (41) and the moving side lower sanding machine (42) are controlled to tighten the strip part (6) and grind and remove the paint from the strip part (6) again; Step 6: When the tail end of the strip material part (6) leaves the working range of the movable side paint remover (4) and the fixed side paint remover (3), the grinding and paint removal of the entire strip material part (6) is completed.

7. The strip primer automatic treatment method according to claim 6, characterized in that: The output end of the cylinder (414) pushes the telescopic connecting rod (415), so that the telescopic connecting rod (415) drives 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) contacts the strip part (6), and the sanding belt (413) in a high-speed rotating state removes the primer on the surface of the strip part (6); when the output end of the cylinder (414) is retracted, the driven wheel (412) is lifted from the strip part (6).

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

9. The strip primer automatic treatment method according to claim 6, characterized in that: The fixed side paint remover (3) and the mobile side paint remover (4) are built in a closed space and are equipped with a dust removal device. Only the front and rear inlets are connected to the outside to ensure the smooth transmission of the strip parts (6). When grinding starts, the dust removal device is started synchronously. After grinding is completed, the dust removal device is stopped to collect primer dust and reduce grinding noise.

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