A color coated plate cutting device based on a plasma arc cutting machine

Abstract

The application discloses a color-coated plate cutting device based on a plasma arc cutting machine and relates to the technical field of plasma arc cutting.The color-coated plate cutting device based on the plasma arc cutting machine comprises a cutting table, a plasma arc cutting head arranged above the cutting table and used for cutting a color-coated plate, and a supporting assembly.The supporting assembly is provided with two groups of upper and lower supporting assemblies symmetrically distributed with respect to the color-coated plate, and a plurality of circular bosses are evenly distributed along the width direction of the color-coated plate on the left and right sides of a cutting opening of the color-coated plate.The circular bosses can automatically avoid and reset along with the movement of the plasma arc cutting head.Through the upper and lower symmetrically arranged supporting assemblies, continuous and uniform multi-point elastic support is provided for the color-coated plate during the cutting process.Meanwhile, the plurality of circular bosses distributed on the upper and lower sides of the plate can automatically adjust the acting position, effectively preventing local deformation and edge warping caused by uneven stress or conveying fluctuation.

Description

Technical Field

[0001] This invention relates to the field of plasma arc cutting technology, specifically to a color-coated steel plate cutting device based on a plasma arc cutting machine. Background Technology

[0002] Color-coated steel sheets are lightweight, high-strength, corrosion-resistant, and aesthetically pleasing composite materials made from cold-rolled or galvanized steel sheets coated with organic paint using a roller coating process. They possess excellent corrosion resistance, decorative properties, and lightweight characteristics, and are widely used in building roofs and walls, appliance casings, furniture, and other fields. During the manufacturing process, cutting is often required according to actual dimensions and shapes, and plasma arc cutting technology is the preferred cutting solution that is economical, efficient, and ensures the performance of color-coated steel sheets.

[0003] However, existing plasma arc cutting heads still have the following problems in the process of cutting color-coated steel sheets: 1. During the cutting process of color-coated steel sheets, if only support is provided from below, the sheet is prone to upward vibration or local swaying under the action of cutting force, which affects the cutting accuracy and processing quality. If the sheet is clamped and fixed by traditional pneumatic or mechanical pressure plates, a large clamping force is required to ensure cutting stability. This not only easily forms stress concentration in the clamping area, causing micro-cracks in the coating on the surface of the color-coated steel sheet due to extrusion, but may also cause local elastic deformation of the sheet.

[0004] 2. In addition, since color-coated steel sheets are generally thin and light, when the cutting path is close to the edge of the sheet, the supporting stiffness of the remaining material drops sharply. If there is no timely and precise local support, the sheet will sag and deform due to its own weight. At the same time, the sheet is prone to deformation during cutting. If it is not smoothed in time, it will cause tearing or bevel distortion before the cut is closed, which will seriously affect the dimensional accuracy and cut quality. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a color-coated steel plate cutting device based on a plasma arc cutting machine, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a color-coated steel plate cutting device based on a plasma arc cutting machine, comprising: a cutting table, on which a plasma arc cutting head is disposed for cutting the color-coated steel plate; a support assembly, which has two sets of upper and lower supports symmetrically distributed about the color-coated steel plate, and circular protrusions evenly distributed along their width direction are respectively provided on the left and right sides of the cutting opening of the color-coated steel plate, the circular protrusions being able to automatically avoid and reset as the plasma arc cutting head moves, providing uniform, continuous and smooth elastic support for the cutting edge of the color-coated steel plate during the cutting process; and an annular pressure plate, which is coaxially disposed with the plasma arc cutting head and can move synchronously with the plasma arc cutting head, pushing the corresponding circular protrusions above and covering and protecting the cutting area during the cutting process.

[0007] Furthermore, a fixing plate is provided on the side of the circular boss away from the color-coated plate, a movable block is slidably installed inside the fixing plate, a support column is installed on the circular boss and slides up and down with the movable block, and a support spring is sleeved on the outside of the support column between the circular boss and the movable block.

[0008] Furthermore, a crossbar is installed on the side of the moving block away from the cutting opening, which slides left and right with the fixed plate. A reset spring is sleeved on the outside of the crossbar between the moving block and the fixed plate to realize the lateral reset function.

[0009] Furthermore, it also includes a smoothing roller, which is circumferentially and evenly arranged on the side of the annular pressure plate near the color-coated plate, and is used to apply outward supporting force to the edge of the cut area of ​​the color-coated plate to achieve external support smoothing treatment.

[0010] Furthermore, the annular pressure plate is provided with two sets of upper and lower symmetrically distributed about the color-coated plate. The side of the annular pressure plate near the color-coated plate is provided with circumferentially evenly distributed mounting grooves. Mounting rods are provided in the mounting grooves. The mounting rods are rotatably connected to the mounting grooves through torsion spring shafts. The smoothing pressure roller is rotatably located at the end of the mounting rod.

[0011] Furthermore, except for the smoothing roller located in the cutting direction of the color-coated sheet, the outer sides of the other smoothing rollers are provided with rolling balls.

[0012] Furthermore, a bracket is hinged to the side of the circular boss away from the cutting area via a torsion spring shaft, and an auxiliary push roller is rotatably installed inside the bracket.

[0013] Furthermore, a frustum-shaped protective sleeve is installed on the side of the annular pressure plate away from the color-coated plate, and a circular plate is provided on the side of the protective sleeve away from the color-coated plate. An elastic telescopic plate is evenly hinged between the circular plate and the protective sleeve along the circumference.

[0014] Furthermore, the fixing plates in the same support assembly are fixedly connected to the same support frame, wherein the lower support frame is fixedly connected to the cutting table, and the front and rear sides of the upper support frame are respectively slidably engaged with the columns installed on the cutting table. A telescopic spring is sleeved on the outside of the column between the cutting table and the support frame. A connecting rod is installed between the front and rear sides of the support frame above, and a mating block that slides with the connecting rod is installed on the side of the plasma arc cutting head near the connecting rod.

[0015] Furthermore, guide rollers are provided on both sides of the cutting position. The guide rollers are rotatably mounted on the upper end of the side plate, and the side plate is fixedly connected to the cutting table.

[0016] The present invention has the following beneficial effects: (1) The color-coated plate cutting device based on plasma arc cutting machine provides continuous and uniform multi-point elastic support for the color-coated plate during the cutting process through the support components arranged symmetrically at the top and bottom. At the same time, unlike the rigid clamping in the traditional method, it uses multiple circular protrusions distributed on the upper and lower sides of the plate to automatically adjust the position of action, ensuring that it always maintains a stable posture during the cutting process. This not only enhances the support rigidity of the thin plate material, but also effectively prevents local deformation and edge warping caused by uneven force or conveying fluctuations, thereby improving the overall processing stability and cutting accuracy.

[0017] (2) In the process of the plasma arc cutting head moving, the circular boss can dynamically avoid the changes in the cutting path and can quickly return to the initial position. During the avoidance process, the circular bosses arranged symmetrically on the left and right move outward synchronously, applying a moderate reverse thrust to the edge of the color-coated plate, so that it is in a taut state, which significantly improves the deformation problem caused by the flexibility of the material. During the reset process, the circular boss can quickly flatten and support the cutting area to prevent the plate from warping or collapsing due to stress release.

[0018] (3) The color-coated steel plate cutting device based on the plasma arc cutting machine is equipped with an annular pressure plate that can move synchronously with the plasma arc cutting head. During the cutting process, the cutting area of ​​the color-coated steel plate is covered and dynamically pressed to prevent spatter contamination and cutting deviation. In addition, the annular pressure plate is equipped with multiple circumferentially distributed smoothing pressure rollers, which can apply a balanced external support force in different directions when in contact with the plate. The smoothing pressure rollers on the upper and lower sides work together to achieve dynamic external support and leveling treatment of the cutting part before and after cutting. This not only improves the flatness of the plate edge, but also enhances the vibration resistance during the cutting process.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Partial cross-sectional planar structural schematic diagram; Figure 3 This is a partial structural diagram of the support component and the plasma arc cutting head in this invention; Figure 4 This is a schematic diagram of the structure of the support component and the annular pressure plate in this invention; Figure 5 This is a schematic diagram of the connecting rod, mating block, and support frame in this invention; Figure 6 This is a partial cross-sectional view of the fixing plate in this invention; Figure 7 This is a schematic diagram of the structure of the circular plate, protective sleeve, and annular pressure plate in this invention; Figure 8 This is a schematic diagram of the structure of the annular pressure plate, mounting rod, and smoothing roller in this invention; Figure 9 This is a schematic diagram showing the position of the guide roller in this invention.

[0021] In the diagram, 1. Color-coated sheet; 11. Support assembly; 111. Circular boss; 112. Fixing plate; 113. Moving block; 114. Support column; 115. Crossbar; 116. Return spring; 117. Support spring; 118. Support frame; 119. Column; 120. Telescopic spring; 121. Connecting rod; 122. Mating block; 123. Bracket; 124. Auxiliary push roller; 131. Annular pressure plate; 132. Protective sleeve; 133. Circular plate; 134. Elastic telescopic plate; 135. Mounting groove; 136. Mounting rod; 137. Smoothing pressure roller; 138. Ball bearing; 151. Guide roller; 2. Cutting table; 3. Plasma arc cutting head. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0024] The following is based on Figures 1-9 This invention describes a color-coated steel plate cutting device based on a plasma arc cutting machine, as provided in an embodiment of the present invention.

[0025] Please refer to Figure 1 This plasma arc cutting machine-based color-coated steel plate cutting device is used to cut continuously conveyed color-coated steel plates 1 into small pieces of the required size. It includes a cutting table 2, on which a conveying device is installed. The conveying device is arranged along the traveling direction of the color-coated steel plate 1, which can continuously and stably convey the unfolded color-coated steel plate 1 to the preset cutting position and realize quantitative feeding to ensure that the cutting length is consistent each time. At the same time, a plasma arc cutting head 3 is also provided. The plasma arc cutting head 3 is movably set above the cutting table 2 through a sliding mechanism. It can be driven by an existing control system, such as a hydraulic slide bar system or a servo motor driven screw structure, to reciprocate along the front and back direction of the cutting table 2, thereby cooperating with the conveying device to realize fixed-length cutting operations and complete the efficient and precise cutting of the color-coated steel plate 1.

[0026] Please refer to Figure 1 and Figure 2 To ensure the smooth progress of the cutting operation, a certain space needs to be maintained below the cutting area of ​​the color-coated sheet 1 to facilitate the cutting action. However, since the color-coated sheet 1 is usually thin and weak, without effective support, the cutting part and its surrounding area are prone to warping or local deformation, which will affect the cutting accuracy and surface quality. Therefore, support components 11 are provided on the upper and lower sides of the color-coated sheet 1 respectively. The upper and lower support components 11 can simultaneously apply opposing support forces to the color-coated sheet 1 to achieve stable support and clamping protection for the sheet.

[0027] Please refer to Figures 2-4Specifically, circular bosses 111 are evenly distributed along their width on both sides of the cutting edge of the color-coated sheet 1. The outer surface of the circular bosses 111 is a smooth arc structure, which forms multi-point support when in contact with the color-coated sheet 1. This not only effectively improves the support stability of the sheet, but also significantly reduces the frictional resistance between the sheet and its surface during the conveying process, thereby ensuring the smooth feeding of the sheet and the continuity of the cutting process. In addition, during the process of the plasma arc cutting head 3 moving back and forth along the length of the color-coated sheet 1 and performing the cutting operation, the circular bosses 111 can automatically avoid and reset according to the change of the cutting position. This design not only avoids interference between the circular bosses 111 and the cutting path during the cutting process, but also can quickly return to the initial support state after the cutting is completed, thereby ensuring the stability of the cutting quality.

[0028] Please refer to Figures 2-6 To achieve automatic avoidance and reset of the circular boss 111 during the cutting process, a fixed plate 112 is provided on the side of the circular boss 111 away from the color-coated plate 1. A movable block 113 is slidably installed inside the fixed plate 112. A support column 114 connected to the movable block 113 is installed on the circular boss 111. A crossbar 115 that slides left and right with the fixed plate 112 is installed on the side of the movable block 113 away from the cutting edge. A reset spring 116 located between the movable block 113 and the fixed plate 112 is sleeved on the outside of the crossbar 115 to provide lateral reset force for the movable block 113. Specifically, when the plasma arc cutting head 3 moves along the cutting direction and applies pressure to the circular boss 111 through the annular pressure plate 131... When force is applied, the circular boss 111 under force drives the moving block 113 to slide outward along the fixed plate 112 via the support column 114. At this time, the circular bosses 111 on the left and right sides will exert a reverse thrust on the color-coated plate 1 during the synchronous outward movement, which helps to tighten the edge of the plate and keep it flat and straight, thereby improving the cutting quality. At the same time, the moving block 113 compresses the return spring 116 through the crossbar 115, so that the circular boss 111 can smoothly avoid the cutting path. After the plasma arc cutting head 3 completes the cutting and moves away, under the elastic action of the return spring 116, the moving block 113 drives the circular boss 111 to return to the initial position, continuing to provide effective support for the edge of the cut plate and preventing it from collapsing or warping.

[0029] Furthermore, a support spring 117 is fitted outside the support column 114, located between the circular boss 111 and the moving block 113. If the color-coated sheet 1 experiences slight vertical swaying or local deformation due to force during the cutting process, the support spring 117 can generate a corresponding reaction force within its elastic range, pushing the circular boss 111 to automatically conform to the surface of the sheet, thereby achieving adaptive support and local leveling of the sheet and improving the support adaptability of the circular boss 111 to the color-coated sheet 1. It should be noted that when the support spring 117 is in its natural state, the circular boss 111 can apply a moderate support force to the color-coated sheet 1, effectively conforming to and supporting the surface of the sheet without causing local deformation of the sheet or affecting its normal transport due to excessive pressure.

[0030] Please refer to Figure 3 , Figure 5 and Figure 9 Additionally, the fixing plate 112 in the same support assembly 11 is installed on the same support frame 118. The lower support frame 118 is fixedly connected to the cutting table 2 to ensure that the lower support assembly 11 is always stably in the set position. The front and rear sides of the upper support frame 118 are respectively slidably engaged with the column 119 installed on the cutting table 2. A telescopic spring 120 is sleeved on the outside of the column 119 between the cutting table 2 and the support frame 118, so that the support frame 118 can move up and down along the column 119 within the elastic range. The upper support frame 118 can be compressed... The telescopic spring 120 moves up and down along the column 119. At the same time, a connecting rod 121 is installed between the front and rear sides of the upper support frame 118. A mating block 122 is installed on the side of the plasma arc cutting head 3 near the connecting rod 121, which slides back and forth with the connecting rod 121. When the plasma arc cutting head 3 starts cutting and moves down to the appropriate cutting height, the mating block 122 moves down synchronously with the cutting machine. The connecting rod 121 drives the upper support frame 118 to press down synchronously along the column 119 and compress the telescopic spring 120, so that the entire upper support assembly 11 moves down to the position where it is in contact with the surface of the color-coated plate 1.

[0031] Thus, after the later cutting is completed, the plasma arc cutting head 3 moves up and resets, which can drive the upper support component 11 to move up synchronously, thereby avoiding unnecessary frictional resistance between it and the cut color-coated plate 1, ensuring that the plate is smoothly transported to the next cutting position. At the same time, this structure can be adapted to color-coated plates 1 of different thicknesses.

[0032] Please refer to Figures 2-6To further enhance the support and leveling effect of the circular boss 111 on the color-coated sheet 1, a bracket 123 is hinged to the side of the circular boss 111 away from the cutting area via a torsion spring shaft. An auxiliary push roller 124 is rotatably installed inside the bracket 123. When the circular boss 111 moves to avoid the cutting process, the bracket 123 swings synchronously via the torsion spring shaft, driving the auxiliary push roller 124 to move outward and always maintain a moderate tilt towards the color-coated sheet 1. This tilt angle is preset by the torsion spring shaft. Under the premise of ensuring no damage to the sheet material, the auxiliary push roller 124 can fit against the surface of the sheet material and apply an outward pushing force to it during the rolling process, thereby achieving the auxiliary external support and tensioning effect on the edge of the color-coated sheet 1.

[0033] Please refer to Figure 4 and Figure 5 In addition, annular pressure plates 131 are respectively provided at positions corresponding to the upper and lower support components 11. The upper and lower annular pressure plates 131 can contact the surface of the color-coated sheet 1 and apply relative forces from the upper and lower sides of the sheet. During the cutting process, they not only play a role in stabilizing and pressing the color-coated sheet 1 and leveling it locally, but also the annular pressure plates 131 are coaxially arranged with the plasma arc cutting head 3 and can move synchronously with the plasma arc cutting head 3. They are used to push the corresponding circular protrusions 111 above and cover and protect the cutting area during the cutting process. They can also apply appropriate pressure to the cutting part, improve the stability of the cutting process and the processing quality. When the plasma arc cutting head 3 moves, it can apply squeezing force to the circular protrusions 111 located on both sides of the cutting edge through the annular pressure plates 131, driving them to avoid the cutting action and achieve dynamic coordination with the cutting action.

[0034] Please refer to Figure 5 and Figure 7 The annular pressure plate 131 has a frustum-shaped protective sleeve 132 installed on the side away from the color-coated plate 1. The protective sleeve 132 is fitted on the outside of the plasma arc cutting head 3 to further protect the cutting head and the surrounding plate. A circular plate 133 is provided on the side of the protective sleeve 132 away from the color-coated plate 1. The upper circular plate 133 is fixedly connected to the plasma arc cutting head 3 and can move synchronously with it. The lower circular plate 133 is set on the cutting table 2 through the existing electric slide rail slider structure. Under the drive of the control system, the lower annular pressure plate 131 can keep synchronous movement with the upper annular pressure plate 131 to ensure the consistency of the pressing state of the upper and lower annular pressure plates 131 during the cutting process.

[0035] In addition, an elastic telescopic plate 134 is uniformly hinged circumferentially between the circular plate 133 and the protective sleeve 132. The elastic telescopic plate 134 is used to realize the elastic connection between the circular plate 133 and the protective sleeve 132. Since the upper circular plate 133 is fixedly connected to the plasma arc cutting head 3 and can move down synchronously with it, during the process of the protective sleeve 132 driving the annular pressure plate 131 to contact the surface of the color-coated plate 1, the elastic telescopic plate 134 can adaptively extend, retract and rotate according to the actual position change, so that the annular pressure plate 131 always fits the surface of the plate, ensuring the pressing stability and support consistency. It should be noted that the rotation angle and extension stroke of the elastic telescopic plate 134 are moderate, which meets the dynamic adjustment requirements while avoiding excessive deformation, thereby preventing adverse effects on the plate.

[0036] Please refer to Figure 8 In order to apply outward support force to the edge of the cutting area of ​​the color-coated sheet 1 to achieve external support smoothing treatment, a circumferentially evenly distributed mounting groove 135 is provided on the side of the annular pressure plate 131 near the color-coated sheet 1. A mounting rod 136 is provided in the mounting groove 135. The mounting rod 136 is rotatably connected to the mounting groove 135 through a torsion spring shaft. The mounting rod 136 is initially inclined outward. A smoothing pressure roller 137 is rotatably provided at the end of the mounting rod 136 for contacting the surface of the color-coated sheet 1 and applying smoothing force. When the annular pressure plate 131 moves downward toward the color-coated sheet 1 with the plasma arc cutting head 3, At the same time, the mounting rod 136 drives the smoothing roller 137 to move synchronously and makes contact with the plate before contacting it. As the annular pressure plate 131 continues to press down, the smoothing roller 137 is subjected to a reverse force, which causes the mounting rod 136 to rotate outward around the torsion spring axis. This causes the smoothing roller 137 to apply a uniform circumferential thrust to the cutting area of ​​the plate. Under the combined action of the smoothing rollers 137, which are in contact with the color-coated plate 1 on both the upper and lower sides, a symmetrical and balanced external support force can be applied to the cutting edge, thereby realizing dynamic external support and leveling of the plate, effectively improving the flatness and structural stability of the cutting part.

[0037] Furthermore, except for the smoothing roller 137 located in the cutting direction of the color-coated sheet 1, the outer sides of the other smoothing rollers 137 are provided with rolling balls 138. The smoothing rollers 137 in the non-cutting direction form rolling contact with the surface of the color-coated sheet 1 through the balls 138, thereby effectively reducing the frictional resistance between them and the sheet during movement. The smoothing rollers 137 located in the cutting direction are not provided with balls 138, so as to apply stable support and leveling effect to the sheet before cutting, preventing the sheet from shifting or vibrating during the cutting process. At the same time, after cutting, the smoothing rollers 137 can still continuously provide moderate pressure to the edge of the sheet, preventing it from warping or deforming due to stress release.

[0038] Please refer to Figures 2-5 and Figure 9Guide rollers 151 are provided on both sides of the cutting position. The guide rollers 151 are rotatably mounted on the upper end of the side plate. The side plate is fixedly connected to the cutting table 2. The guide rollers 151 are used to limit and guide the front-to-back direction and the up-and-down position of the color-coated plate 1 during the conveying process, so as to prevent the plate from shifting, tilting or shaking up and down during the conveying or cutting process, thereby further improving the stability of the plate operation and the reliability of the cutting process.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] The preferred embodiments of the present invention disclosed above are only for illustrating the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Obviously, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A color-coated steel sheet cutting device based on a plasma arc cutting machine, characterized in that, include: A cutting table (2) is provided above the cutting table (2) and a plasma arc cutting head (3) is provided for cutting the color-coated plate (1). The support component (11) is provided with two sets of upper and lower parts symmetrically distributed about the color-coated plate (1). On the left and right sides of the cutting opening of the color-coated plate (1), there are circular bosses (111) evenly distributed along their width direction. The circular bosses (111) can automatically avoid and reset as the plasma arc cutting head (3) moves, and are used to provide uniform, continuous and smooth elastic support for the cutting edge of the color-coated plate (1) during the cutting process. The annular pressure plate (131) is coaxially arranged with the plasma arc cutting head (3) and can move synchronously with the plasma arc cutting head (3). It is used to push the corresponding circular boss (111) above during the cutting process and to cover and protect the cutting area.

2. The color-coated steel plate cutting device based on a plasma arc cutting machine according to claim 1, characterized in that, A fixing plate (112) is provided on the side of the circular boss (111) away from the color-coated plate (1). A moving block (113) is slidably installed inside the fixing plate (112). A support column (114) is installed on the circular boss (111) and slides up and down with the moving block (113). A support spring (117) is sleeved on the outside of the support column (114) between the circular boss (111) and the moving block (113).

3. The color-coated steel sheet cutting device based on a plasma arc cutting machine according to claim 2, characterized in that, The moving block (113) is equipped with a crossbar (115) that slides left and right with the fixed plate (112) on the side away from the cutting opening. A reset spring (116) is sleeved on the outside of the crossbar (115) between the moving block (113) and the fixed plate (112) to realize the lateral reset function.

4. The color-coated steel plate cutting device based on a plasma arc cutting machine according to claim 1, characterized in that, It also includes a smoothing roller (137), which is circumferentially and uniformly arranged on the side of the annular pressure plate (131) near the color-coated plate (1) to apply outward supporting force to the edge of the cutting area of ​​the color-coated plate (1) in order to achieve external support smoothing treatment.

5. A color-coated steel sheet cutting device based on a plasma arc cutting machine according to claim 4, characterized in that, The annular pressure plate (131) is provided with two sets of upper and lower symmetrically distributed about the color-coated plate (1). The annular pressure plate (131) has a circumferentially evenly distributed mounting groove (135) on the side near the color-coated plate (1). The mounting groove (135) is provided with a mounting rod (136). The mounting rod (136) is rotatably connected to the mounting groove (135) through a torsion spring shaft. The smoothing pressure roller (137) is rotatably disposed at the end of the mounting rod (136).

6. A color-coated steel sheet cutting device based on a plasma arc cutting machine according to claim 5, characterized in that, Except for the smoothing roller (137) located in the cutting direction of the color-coated plate (1), the outer side of the other smoothing rollers (137) is provided with rolling balls (138).

7. A color-coated steel sheet cutting device based on a plasma arc cutting machine according to claim 2, characterized in that, The circular boss (111) is hinged to a bracket (123) on the side away from the cutting part by a torsion spring shaft, and an auxiliary push roller (124) is rotatably arranged inside the bracket (123).

8. A color-coated steel sheet cutting device based on a plasma arc cutting machine according to claim 3, characterized in that, A frustum-shaped protective sleeve (132) is installed on the side of the annular pressure plate (131) away from the color-coated plate (1). A circular plate (133) is provided on the side of the protective sleeve (132) away from the color-coated plate (1). An elastic telescopic plate (134) is evenly hinged between the circular plate (133) and the protective sleeve (132) along the circumference.

9. A color-coated steel sheet cutting device based on a plasma arc cutting machine according to claim 2, characterized in that, The fixing plate (112) in the same support assembly (11) is fixedly connected to the same support frame (118). The lower support frame (118) is fixedly connected to the cutting table (2), and the front and rear sides of the upper support frame (118) are respectively slidably engaged with the column (119) installed on the cutting table (2). The outer side of the column (119) is fitted with a telescopic spring (120) located between the cutting table (2) and the support frame (118). A connecting rod (121) is installed between the front and rear sides of the support frame (118) above, and a mating block (122) that slides with the connecting rod (121) is installed on the side of the plasma arc cutting head (3) near the connecting rod (121).

10. A color-coated steel sheet cutting device based on a plasma arc cutting machine according to claim 8, characterized in that, Guide rollers (151) are provided on both sides of the cutting position. The guide rollers (151) are rotatably mounted on the upper end of the side plate, and the side plate is fixedly connected to the cutting table (2).

Images