A method for processing the end of a double bulb head flat steel

Abstract

The application relates to a double-ball-head bulb flat steel end processing method. The method comprises the following steps: obtaining length, width and thickness values of a web and a ball head and a torch angle value of an edge side wall; arranging a torch above a plate material pre-processed into a double-ball-head bulb flat steel; separately cutting the web and the ball head to establish two corresponding plane cutting paths of the web and the ball head; setting a plurality of position points on each path according to the conversion positions of the torch angle values of the edge side walls of the web and the ball head, and each position point has a corresponding torch angle value; and controlling the torch to pass through the plurality of position points along the plane cutting paths of the web and the ball head in sequence according to a processing sequence of cutting the ball head first and then cutting the web, and controlling the torch to complete angle conversion of the torch in a uniform and gradual manner during movement between two adjacent position points. The method can reduce precision control difficulty, realize automatic processing of a double-ball-head bulb flat steel end, and improve processing efficiency and accuracy.

Description

Technical Field

[0001] This application relates to the field of shipbuilding and marine engineering construction technology, and in particular to a method for processing the end of a double-ball-head flat steel bar. Background Technology

[0002] Bulb flat steel, used as a load-bearing component in ship and offshore platform structures, is a special type of steel consisting of a flat web and a spherical head. Based on the number of heads, bulb flat steel can be classified into single-head bulb flat steel and double-head bulb flat steel.

[0003] The structure of double-nosed bulb flats is more rational than that of single-nosed bulb flats, but their end joints are more complex, making them far more difficult to manufacture. Currently, there is no suitable method for automating the processing of the ends of double-nosed bulb flats. In shipbuilding, single-nosed bulb flats are the most commonly used. Double-nosed bulb flats are only used in small quantities on a few high-value special-purpose vessels and have not been widely adopted.

[0004] The web and bulbous end of a double-ball-head flat steel bar have their own bevel angle requirements, and the two bevel surfaces are connected by direct intersection. This makes overlapping and interference of the cut seams extremely likely at the "T"-shaped connection between the web and bulbous end. Therefore, double-ball-head flat steel bars cannot be accurately cut during the blanking stage and must be manually trimmed at the ends during on-site installation. However, on-site trimming is labor-intensive, requires highly experienced workers, is inefficient, and makes it difficult to guarantee cutting quality. Summary of the Invention

[0005] Therefore, it is necessary to provide a method for processing the ends of double-ball-head flat steel to address the aforementioned technical problems, thereby solving the problems of poor processing quality and low efficiency of the ends of double-ball-head flat steel and realizing automated cutting of the ends of double-ball-head flat steel.

[0006] On the one hand, a method for processing the end of a double-headed bulb flat steel is provided, the double-headed bulb flat steel including a web and a bulb head, the method comprising:

[0007] Obtain the length, width, and thickness values ​​of the web and ball head, as well as the torch angle values ​​of their edge sidewalls;

[0008] A cutting torch is placed above the sheet metal pre-processed into double-ball-head flat steel.

[0009] By cutting the web and ball head separately, two plane cutting paths are established for the web and ball head respectively.

[0010] Multiple position points are set on each path according to the conversion position of the torch angle value of the edge sidewall of the web and the ball head. Each position point has a corresponding torch angle value.

[0011] Following the processing sequence of first cutting the ball head and then cutting the web, the cutting torch is controlled to pass through multiple position points sequentially along the planar cutting path of the web and the ball head, and the angle of the cutting torch is controlled to be changed in a uniform and gradual manner during the movement between two adjacent position points.

[0012] Furthermore, the planar cutting path of the ball head is n-shaped, consisting of three straight paths in the same plane, with the three straight paths located at a first height position above the top plane of the ball head; wherein, the planar cutting path of the ball head includes a first segment path, a second segment path, and a third segment path, the first segment path and the third segment path are parallel and opposite in direction, and the second segment path is perpendicular to the first segment path and the third segment path, respectively.

[0013] Furthermore, the first segment of the ball head path starts from the maximum width of the first side ball head, moves along the top plane of the ball head towards the second side ball head, until it reaches the maximum width of the second side ball head; the third segment of the ball head path starts from the maximum width of the second side ball head, moves along the top plane of the ball head towards the first side ball head, until it reaches the maximum width of the first side ball head; the second segment of the ball head path starts from the end point of the first segment of the ball head path, moves along the length direction of the double ball head flat steel, until it reaches the starting point of the third segment of the ball head path, and the angle conversion of the cutting torch is completed during the movement.

[0014] Furthermore, when the bevel type of the ball head is I bevel, V bevel, or A bevel, the cutting torch only executes the first segment of the ball head path. The cutting torch angle direction is one of straight cut, forward cut, or reverse cut. The cutting torch starts arc cutting at the beginning of the first segment of the ball head path and extinguishes the arc at the end of the first segment of the ball head path, completing the ball head machining. When the bevel type of the ball head is X bevel, Y bevel, or inverted Y bevel, the cutting torch executes the first segment, second segment, and third segment of the ball head path consecutively. The cutting torch uses different angle directions on the first and third segment of the ball head path. The cutting torch angle direction is one of straight cut, forward cut, or reverse cut. The order of the cutting torch angle direction is: reverse cut → straight cut → forward cut. The cutting torch completes the conversion from the cutting torch angle direction of the first segment of the ball head path to the cutting torch angle direction of the third segment of the ball head path on the second segment of the ball head path.

[0015] Furthermore, the planar cutting path of the web is n-shaped, consisting of three straight paths in the same plane, with the three straight paths located at the second height position above the upper surface of the web; wherein, the planar cutting path of the web includes a first web path, a second web path, and a third web path, the first web path and the third web path are parallel and opposite in direction, and the second web path is perpendicular to the first web path and the third web path, respectively.

[0016] Furthermore, the first segment of the web plate path starts from the bottom of the web plate and moves inward along the upper surface of the web plate until it reaches the maximum thickness of the ball head; the third segment of the web plate path starts from the maximum thickness of the ball head and moves outward along the upper surface of the web plate until it reaches the bottom of the web plate; the second segment of the web plate path starts from the end point of the first segment of the ball head path and moves along the length direction of the double ball head flat steel until it reaches the starting point of the third segment of the web plate path, completing the angle conversion of the cutting torch during the movement.

[0017] Furthermore, when the web bevel type is I bevel, V bevel, or A bevel, the cutting torch only executes the first segment of the web path. The cutting torch angle direction is one of straight cut, forward cut, or reverse cut. The cutting torch starts arc cutting at the beginning of the first segment of the web path and extinguishes the arc at the end of the first segment of the web path, completing the end web processing. When the web bevel type is X bevel, Y bevel, or inverted Y bevel, the cutting torch executes the first segment of the web path, the second segment of the web path, and the third segment of the web path consecutively. The cutting torch uses different angle directions on the first segment of the web path and the third segment of the web path. The cutting torch angle direction is one of straight cut, forward cut, or reverse cut. The order of the cutting torch angle direction is: reverse cut → straight cut → forward cut. The cutting torch completes the conversion from the angle direction of the first segment of the web path to the angle direction of the third segment of the web path on the second segment of the web path.

[0018] Furthermore, when the cutting torch angle direction is a straight cut, the central axis of the cutting torch is perpendicular to the plane where the plate is located, and the cutting torch angle value is 0°; when the cutting torch angle direction is a positive cut, the angle between the central axis of the cutting torch and the plane where the plate is located is less than 90°, and the cutting torch angle value is greater than 0°; when the cutting torch angle direction is a reverse cut, the angle between the central axis of the cutting torch and the plane where the plate is located is greater than 90°, and the cutting torch angle value is less than 0°.

[0019] Furthermore, the step of controlling the cutting torch to complete the angle transformation of the cutting torch in a uniform and gradual manner during the movement between two adjacent position points includes: during the cutting process, controlling the cutting torch according to the position point-angle value (i, θ) i Adjust the angle at two adjacent different positions - angle value (i, θ) i The average interpolation method is used between the two, and the cutting torch angle changes uniformly and gradually during the movement.

[0020] Furthermore, the cutting torch employs low-current, low-speed plasma cutting on the ball head, with a cutting current of 160~200A and a cutting speed of 1200~1900mm / min.

[0021] The above-mentioned method for processing the ends of double-ball-head flat steel has the following positive and progressive effects:

[0022] 1) This invention uses separate cutting of the web and the ball head, and the cutting of the two does not affect each other, which reduces the difficulty of precision control and ensures the cutting quality.

[0023] 2) In the processing method of the present invention, when cutting the web and the ball head, the cutting torch only needs to perform simple two-dimensional movement and angle deflection in a plane related to the plane where the respective plates are located, without the need for complex three-dimensional motion transformation, thus reducing the difficulty of operating the cutting equipment.

[0024] 3) According to the processing method of the present invention, it can be applied to computer programming to generate instruction programs that can be recognized and executed by automated cutting equipment, thereby realizing the automation of the processing of the ends of double-ball-head flat steel, improving processing efficiency and accuracy, and reducing the uncertainty caused by manual cutting. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the end form of a double-ball-head flat steel according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the cutting path of the ball head and web at the end of a double-ball-head flat steel according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram showing the distribution of the cutting path points at the end of the double-ball-head flat steel according to an embodiment of the present invention;

[0029] Figure 4 This is a cross-sectional view of the cutting path at various points on the end of the double-ball-head flat steel according to an embodiment of the present invention;

[0030] Figure 5 This is a cutting path location point and corresponding cutting cross-section diagram of the end web of a double-ball-head flat steel according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram illustrating reverse cutting, straight cutting, and forward cutting using a cutting torch according to an embodiment of the present invention;

[0032] Figure 7 This is a schematic flowchart illustrating a method for processing the end of a double-ball-head flat steel according to an embodiment of the present invention.

[0033] In the picture:

[0034] Ball head A, web B, first side ball head area A1, first side transition area A2, middle area A3, second side transition area A4, second side ball head area A5, cutting torch C;

[0035] Ball head cutting path FL, ball head first segment path FL1, ball head second segment path FL2, ball head third segment path FL3; F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, F13, F14 are the ball head cutting path location points;

[0036] Web cutting path WL, first web segment path WL1, second web segment path WL2, third web segment path WL3; W1, W2, W3, W4, W5, W6, W7, W8, W9, W10, W11, W12, W13, and W14 are the position points on the ball head cutting path. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] As described in the background section, the processing of the ends of double-ball-head flat steel has problems such as poor quality and low efficiency.

[0039] To address the aforementioned problems, this invention creatively proposes a method for processing the ends of double-ball-head flat steel, achieving automated cutting of the ends of the double-ball-head flat steel and improving processing efficiency and quality. The technical solution adopted is as follows:

[0040] Double-head bulb flat steel is cut with the web and bulb head separately, and two different planar cutting paths are established for the web and bulb head respectively. The two cutting paths do not affect each other.

[0041] The processing sequence is to cut the ball head first, then cut the web. The cutting paths for the web and ball head consist of one or three cutting paths.

[0042] The cutting torch has different angles along each cutting path. The cutting sequence for the web and ball head is reverse cutting → straight cutting → forward cutting. Multiple position points are set along each cutting path, and each position point has a corresponding angle value.

[0043] The ball head cutting process uses low-current, low-speed plasma cutting. The cutting current is 160~200A and the cutting speed does not exceed 1900mm / min. In the middle area of ​​the ball head width, the speed can be appropriately reduced according to the increase of the ball head thickness, but it cannot be lower than 1200mm / min.

[0044] Double-ball-head flat steel consists of a ball head and a web. The ball head is divided into a first-side ball head area, a first-side transition area, a middle area, a second-side transition area, and a second-side ball head area.

[0045] The ball head cutting path is shaped like an "n", consisting of three straight paths in the same plane, located at a certain height above the top plane of the ball head. The first and third straight paths are parallel to each other but in opposite directions; the second straight path is perpendicular to both the first and third straight paths.

[0046] The path of the cutting torch is as follows: The first segment of the path begins at the maximum width of the first side of the cutting torch and moves along the top plane of the cutting torch towards the second side of the cutting torch until it reaches the maximum width of the second side of the cutting torch. The third segment of the path begins at the maximum width of the second side of the cutting torch and moves along the top plane of the cutting torch towards the first side of the cutting torch until it reaches the maximum width of the first side of the cutting torch. The second segment of the path begins at the end of the first segment of the path and moves along the length of the double-ball flat steel until it reaches the beginning of the third segment of the path, during which the angle of the cutting torch is changed.

[0047] When the bevel type of the ball head is I bevel, V bevel, or A bevel, the cutting torch only executes the first segment of the ball head path. The cutting torch angle direction is one of straight cut, forward cut, or reverse cut. The cutting torch starts arc cutting at the beginning of the first segment of the ball head path and extinguishes the arc at the end of the first segment of the ball head path, thus completing the ball head processing.

[0048] When the bevel type of the ball head is X-bevel, Y-bevel, or inverted Y-bevel, the cutting torch continuously executes the first, second, and third segments of the ball head path. The cutting torch uses different angle directions on the first and third segments of the ball head path, which can be one of three: straight cut, normal cut, or reverse cut. The order of the cutting torch angle directions is: reverse cut → straight cut → normal cut. On the second segment of the ball head path, the cutting torch completes the transition from the cutting torch angle direction of the first segment to the cutting torch angle direction of the third segment.

[0049] Seven different position points are set on the first and third segments of the ball head path, and each position point has a corresponding torch angle value θ.

[0050] Points F1 and F7 are located at the maximum width of the ball head, F4 is located in the center area of ​​the ball head and does not exceed the thickness of the web plate; F3 and F5 are located on both sides of the center point of the ball head, about 0.6 times the thickness of the web plate; F2 and F6 are located on both sides of the center point of the ball head, about 1.5 times the thickness of the web plate.

[0051] The area between F1 and F2 is the first side ball head area, F2 and F3 are the first side transition area, F3 and F5 are the middle area, F5 and F6 are the second side transition area, and F6 and F7 are the second side ball head area.

[0052] The web cutting path is shaped like an "n," consisting of three straight paths within the same plane, positioned at a certain height above the upper surface of the web. The first and third web paths are parallel and opposite in direction; the second web path is perpendicular to both the first and third web paths.

[0053] The path is divided into three segments: the first segment of the web begins at the bottom of the web and moves inward along the upper surface of the web until it reaches the maximum thickness of the ball head. The third segment of the web begins at the maximum thickness of the ball head and moves outward along the upper surface of the web until it reaches the bottom of the web. The second segment of the web begins at the end of the first segment of the web path and moves along the length of the double-ball head flat bar until it reaches the beginning of the third segment of the web path, during which the angle of the cutting torch is changed.

[0054] When the web bevel type is I bevel, V bevel, or A bevel, the cutting torch only executes the first segment of the web path. The cutting torch angle direction is one of straight cut, forward cut, or reverse cut. The cutting torch starts arc cutting at the beginning of the first segment of the web path and extinguishes the arc at the end of the first segment of the web path, thus completing the end web processing.

[0055] When the web bevel type is X-bevel, Y-bevel, or inverted Y-bevel, the cutting torch continuously executes the first, second, and third web bevel paths. The cutting torch uses different angles on the first and third web bevel paths, with the angle direction being one of three: straight cut, normal cut, or reverse cut. The order of the cutting torch angle directions is: reverse cut → straight cut → normal cut. On the second web bevel path, the cutting torch completes the transition from the angle direction of the first web bevel path to the angle direction of the third web bevel path.

[0056] On the first segment of the web and the third segment of the ball head, there are two position points i, one starting and one ending, and each position point has a corresponding torch angle value θ.

[0057] The method for processing the ends of the double-ball-head flat steel includes the following steps:

[0058] The first step is ball head cutting. The cutting torch starts cutting at the beginning of the first segment of the ball head's path and extinguishes the arc at the end of the third segment of the ball head's path, completing the ball head machining.

[0059] The first step is web cutting. The cutting torch starts cutting at the beginning of the first segment of the web path and extinguishes the arc at the end of the third segment of the web path, completing the end web machining.

[0060] During the cutting process, the cutting torch adjusts its position based on the angle value (i, θ). i Adjust the angle at two adjacent different positions - angle value (i, θ) i The average interpolation method is used between the two, and the cutting torch angle changes uniformly and gradually during the movement.

[0061] The following are specific examples of processing double-ball-head flat steel. The dimensions of the double-ball-head flat steel are 200*60*23*8.4mm. Figure 1 The GG section shown has a spherical head with an inverted Y-shaped bevel, leaving a root length of L=5mm and a reverse tangent angle of 30°; as shown... Figure 1 The HH section shown has a symmetrical X-bevel web with a tangent of 30° and a reverse tangent of 30°.

[0062] like Figure 1 , Figure 3 As shown, the double-ball-head flat steel is composed of a ball head A and a web B. The ball head is divided into a first-side ball head area A1, a first-side transition area A2, a middle area A3, a second-side transition area A4, and a second-side ball head area A3.

[0063] like Figure 2 , Figure 3 As shown, the ball head cutting path FL is shaped like an "n," consisting of three straight paths within the same plane, positioned at a certain height above the top plane of the ball head. The first path FL1 is parallel to the third path FL3, but in opposite directions; the second path FL2 is perpendicular to both the first and third paths FL1 and FL3. F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, F13, and F14 are the location points of the ball head cutting path.

[0064] like Figure 4 As shown, seven different position points F1, F2, F3, F4, F5, F6, and F7 are set on the first segment of the ball head path FL1. Each position point has its own corresponding torch angle value θ. From the starting point to the ending point, the position point - angle value (Fi, θ) Fi The numbers are (F1, θ) respectively. F1 (F2, θ) F2 (F3, θ) F3 (F4, θ) F4 (F5, θ) F5 (F6, θ) F6 (F7, θ) F7 The angle of the cutting torch C on the first segment of the ball head's path FL1 is reverse tangent, θ F1 θ F2 θ F3 θ F4 θ F5 θF6 θ F7 The values ​​are -30°, -30°, -8°, 0°, -8°, -30°, and -30°, respectively.

[0065] like Figure 4 As shown, seven different positions F8, F9, F10, F11, F12, F13, and F14 are set on the third segment of the ball head path FL3. From the starting point to the end point, each position has a corresponding torch angle value, which are (F8, θ) and (F14, F15, F16, F17, F18, F19, F10, F11, F12, F13, F14 ... F8 (F9, θ) F9 (F10, θ) F10 (F11, θ) F11 (F12, θ) F12 (F13, θ) F13 (F14, θ) F14 The angle of the cutting torch C on the third segment of the ball head path FL3 is perpendicular, θ F8 θ F9 θ F10 θ F11 θ F12 θ F13 θ F14 All values ​​are 0°.

[0066] like Figure 3 As shown, the starting point of the second segment of the ball head path FL2 is F7, and the ending point is F8.

[0067] The web cutting path WL is shaped like an "n" and consists of three straight paths in the same plane, located at a certain height above the upper surface of the web. The first web path WL1 is parallel to the third web path WL3, but in opposite directions; the second web path WL2 is perpendicular to both the first web path WL1 and the third web path WL3. W1, W2, W3, W4, W5, W6, W7, W8, W9, W10, W11, W12, W13, and W14 are the position points on the ball head cutting path.

[0068] like Figure 5 As shown, the first segment of the web path WL1 starts at the bottom of the web W1 and ends at the point of maximum thickness of the ball head W2. The position point-angle value (Wi, θ) Wi ) are respectively (W1, θ W1 (W2, θ) W2 ), θ W1 θ W2 The values ​​are all -30°.

[0069] like Figure 5 As shown, the third segment of the web, WL3, starts at the point of maximum thickness at the ball head (W3) and ends at the bottom of the web (W4). The position point-angle values ​​are (Wi, θ).Wi ) are respectively (W3, θ W3 (W3, θ) W3 ), θ W3 θ W4 The values ​​are all 30°.

[0070] like Figure 5 As shown, the starting point of the second segment path WL2 of the web is W2, and the ending point is W3.

[0071] The method for processing the ends of the double-ball-head flat steel includes the following steps:

[0072] The first step is ball head cutting. The cutting torch C starts the plasma arc at position F1 and begins cutting, proceeding along the first segment of the ball head path FL1, passing through positions F2, F3, F4, F5, and F6, reaching position F7. The plasma arc remains active throughout, completing the cutting of the first segment of the ball head path FL1. The cutting torch C moves from position F7 to position F8, maintaining the plasma arc throughout, completing the cutting of the second segment of the ball head path FL2. Starting at position F8, the cutting torch C proceeds along the third segment of the ball head path FL3, passing through positions F9, F10, F11, F12, and F13, maintaining the plasma arc throughout, finally reaching position F14, where the plasma arc is deactivated, completing the cutting of the third segment of the ball head path FL3. Throughout the entire ball head cutting process, the cutting torch C operates according to the position-angle value (Fi, θ). Fi Adjust the angle at two adjacent different positions - angle value (Fi, θ) Fi The average interpolation method is used between the two, and the angle of the cutting torch C changes uniformly and gradually during the movement.

[0073] The second step is web cutting. The cutting torch C starts the plasma arc at position point W1 and begins cutting along the first web path WL1, maintaining the plasma arc throughout the process until it reaches position point W1, completing the first web path WL1 cut. The cutting torch C then moves from position point W2 to position point W3, maintaining the plasma arc throughout the process, completing the second web path WL2 cut. Starting at position point W3, the cutting torch C continues along the third web path WL3, maintaining the plasma arc throughout the process, finally reaching position point F14 and shutting off the plasma arc, completing the third web path WL3 cut. Throughout the entire web cutting process, the cutting torch C operates according to the position point-angle value (Wi, θ). Wi Adjust the angle at two adjacent different positions - angle value (Wi, θ) Wi The average interpolation method is used between the two, and the angle of the cutting torch C changes uniformly and gradually during the movement.

[0074] The positive and progressive effects of this invention are as follows:

[0075] 1) This invention uses separate cutting of the web and the ball head, and the cutting of the two does not affect each other, which reduces the difficulty of precision control and ensures the cutting quality.

[0076] 2) In the processing method of the present invention, when cutting the web and the ball head, the cutting torch only needs to perform simple two-dimensional movement and angle deflection in a plane related to the plane where the respective plates are located, without the need for complex three-dimensional motion transformation, thus reducing the difficulty of operating the cutting equipment.

[0077] 3) According to the processing method of the present invention, it can be applied to computer programming to generate instruction programs that can be recognized and executed by automated cutting equipment, thereby realizing the automation of the processing of the ends of double-ball-head flat steel, improving processing efficiency and accuracy, and reducing the uncertainty caused by manual cutting.

[0078] Example 2

[0079] Example 2 includes all the technical features of Example 1. Example 2 provides a method for processing the end of a double-ball-head flat steel bar. The double-ball-head flat steel bar includes a web and a ball head, wherein the ball head is located at the end of the web and the web and the ball head form a T-shaped structure.

[0080] like Figure 1 , Figure 3 As shown, the double-ball-head flat steel is composed of a ball head A and a web B. The ball head is divided into a first-side ball head area A1, a first-side transition area A2, a middle area A3, a second-side transition area A4, and a second-side ball head area A3.

[0081] like Figure 7 As shown, the method for processing the ends of the double-ball-head flat steel includes the following steps:

[0082] Step S1: Obtain the length, width, and thickness values ​​of the web and ball head, as well as the torch angle values ​​of their edge sidewalls;

[0083] Step S2: Set a cutting torch above the plate pre-processed into a double-ball-head flat steel bar;

[0084] Step S3: Using the method of cutting the web and the ball head separately, establish two plane cutting paths corresponding to the web and the ball head respectively;

[0085] Step S4: Set multiple position points on each path according to the conversion position of the torch angle value of the edge sidewall of the web and the ball head. Each position point has a corresponding torch angle value.

[0086] Step S5: Following the processing sequence of cutting the ball head first and then the web, control the cutting torch to pass through multiple position points sequentially along the planar cutting path of the web and the ball head, and control the cutting torch to complete the angle conversion of the cutting torch in a uniform and gradual manner during the movement between two adjacent position points.

[0087] like Figure 2 , Figure 3 As shown, the planar cutting path of the ball head is n-shaped, consisting of three straight paths in the same plane. The three straight paths are located at a first height position above the top plane of the ball head. The planar cutting path of the ball head includes a first segment path, a second segment path, and a third segment path. The first segment path and the third segment path are parallel and opposite in direction. The second segment path is perpendicular to the first segment path and the third segment path.

[0088] Furthermore, the first segment of the ball head path starts from the maximum width of the first side ball head, moves along the top plane of the ball head towards the second side ball head, until it reaches the maximum width of the second side ball head; the third segment of the ball head path starts from the maximum width of the second side ball head, moves along the top plane of the ball head towards the first side ball head, until it reaches the maximum width of the first side ball head; the second segment of the ball head path starts from the end point of the first segment of the ball head path, moves along the length direction of the double ball head flat steel, until it reaches the starting point of the third segment of the ball head path, and the angle conversion of the cutting torch is completed during the movement.

[0089] Furthermore, when the bevel type of the ball head is I bevel, V bevel, or A bevel, the cutting torch only executes the first segment of the ball head path. The cutting torch angle direction is one of straight cut, forward cut, or reverse cut. The cutting torch starts arc cutting at the beginning of the first segment of the ball head path and extinguishes the arc at the end of the first segment of the ball head path, completing the ball head machining. When the bevel type of the ball head is X bevel, Y bevel, or inverted Y bevel, the cutting torch executes the first segment, second segment, and third segment of the ball head path consecutively. The cutting torch uses different angle directions on the first and third segment of the ball head path. The cutting torch angle direction is one of straight cut, forward cut, or reverse cut. The order of the cutting torch angle direction is: reverse cut → straight cut → forward cut. The cutting torch completes the conversion from the cutting torch angle direction of the first segment of the ball head path to the cutting torch angle direction of the third segment of the ball head path on the second segment of the ball head path.

[0090] like Figure 2 , Figure 5 As shown, the planar cutting path of the web is n-shaped, consisting of three straight paths in the same plane, which are located at the second height position above the upper surface of the web; wherein, the planar cutting path of the web includes a first web path, a second web path, and a third web path, the first web path and the third web path are parallel and opposite in direction, and the second web path is perpendicular to the first web path and the third web path.

[0091] Furthermore, the first segment of the web plate path starts from the bottom of the web plate and moves inward along the upper surface of the web plate until it reaches the maximum thickness of the ball head; the third segment of the web plate path starts from the maximum thickness of the ball head and moves outward along the upper surface of the web plate until it reaches the bottom of the web plate; the second segment of the web plate path starts from the end point of the first segment of the ball head path and moves along the length direction of the double ball head flat steel until it reaches the starting point of the third segment of the web plate path, completing the angle conversion of the cutting torch during the movement.

[0092] Furthermore, when the web bevel type is I bevel, V bevel, or A bevel, the cutting torch only executes the first segment of the web path. The cutting torch angle direction is one of straight cut, forward cut, or reverse cut. The cutting torch starts arc cutting at the beginning of the first segment of the web path and extinguishes the arc at the end of the first segment of the web path, completing the end web processing. When the web bevel type is X bevel, Y bevel, or inverted Y bevel, the cutting torch executes the first segment of the web path, the second segment of the web path, and the third segment of the web path consecutively. The cutting torch uses different angle directions on the first segment of the web path and the third segment of the web path. The cutting torch angle direction is one of straight cut, forward cut, or reverse cut. The order of the cutting torch angle direction is: reverse cut → straight cut → forward cut. The cutting torch completes the conversion from the angle direction of the first segment of the web path to the angle direction of the third segment of the web path on the second segment of the web path.

[0093] like Figure 6 As shown, when the cutting torch angle direction is straight cutting, the central axis of the cutting torch is perpendicular to the plane where the plate is located, and the cutting torch angle value is 0°; when the cutting torch angle direction is positive tangent, the angle between the central axis of the cutting torch and the plane where the plate is located is less than 90°, and the cutting torch angle value is greater than 0°; when the cutting torch angle direction is reverse tangent, the angle between the central axis of the cutting torch and the plane where the plate is located is greater than 90°, and the cutting torch angle value is less than 0°.

[0094] like Figure 4 , Figure 5 As shown, the step of controlling the cutting torch to complete the angle transformation of the cutting torch in a uniform and gradual manner during the movement between two adjacent position points includes: during the cutting process, controlling the cutting torch according to the position point-angle value (i, θ) i Adjust the angle at two adjacent different positions - angle value (i, θ) i The average interpolation method is used between the two, and the cutting torch angle changes uniformly and gradually during the movement.

[0095] Furthermore, the cutting torch employs low-current, low-speed plasma cutting on the ball head, with a cutting current of 160~200A and a cutting speed of 1200~1900mm / min.

[0096] The positive and progressive effects of this invention are as follows:

[0097] 1) This invention uses separate cutting of the web and the ball head, and the cutting of the two does not affect each other, which reduces the difficulty of precision control and ensures the cutting quality.

[0098] 2) In the processing method of the present invention, when cutting the web and the ball head, the cutting torch only needs to perform simple two-dimensional movement and angle deflection in a plane related to the plane where the respective plates are located, without the need for complex three-dimensional motion transformation, thus reducing the difficulty of operating the cutting equipment.

[0099] 3) According to the processing method of the present invention, it can be applied to computer programming to generate instruction programs that can be recognized and executed by automated cutting equipment, thereby realizing the automation of the processing of the ends of double-ball-head flat steel, improving processing efficiency and accuracy, and reducing the uncertainty caused by manual cutting.

[0100] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method of machining the end of a double bulb head flat steel, the double bulb head flat steel comprising a web and a bulb head, characterized in that, The method comprises: Obtaining length, width, thickness values of the web and the head, and torch angle values of the edge side walls thereof; Setting a torch above the plate material pre-processed into a double-head flat-bulb steel; Separately cutting the web and the head to respectively establish corresponding two planar cutting paths of the web and the head; Setting a plurality of position points on each path according to the conversion positions of the torch angle values of the edge side walls of the web and the head, each position point having a corresponding torch angle value; Controlling the torch to sequentially pass through the plurality of position points along the planar cutting paths of the web and the head in a processing sequence of cutting the head first and then cutting the web, and controlling the torch to complete the angle conversion of the torch in a uniform gradual manner during movement between two adjacent position points; The planar cutting path of the head is in the shape of n, composed of three straight line paths in the same plane, and the three straight line paths are located at a first height position above the top plane of the head; the planar cutting path of the head comprises a head first path, a head second path and a head third path, the head first path is parallel to the head third path and has opposite directions, and the head second path is perpendicular to the head first path and the head third path respectively; The head first path starts from the maximum width of the first side head, moves along the top plane of the head towards the second side head until reaching the maximum width of the second side head; the head third path starts from the maximum width of the second side head, moves along the top plane of the head towards the first side head until reaching the maximum width of the first side head; the head second path starts from the end point of the head first path, moves along the length direction of the double-head flat-bulb steel until reaching the start point of the head third path, and completes the angle conversion of the torch during the movement; The planar cutting path of the web is in the shape of n, composed of three straight line paths in the same plane, and the three straight line paths are located at a second height position above the upper surface of the web; the planar cutting path of the web comprises a web first path, a web second path and a web third path, the web first path is parallel to the web third path and has opposite directions, and the web second path is perpendicular to the web first path and the web third path respectively; The web first path starts from the bottom of the web, moves inwards along the upper surface of the web until reaching the maximum thickness of the head; the web third path starts from the maximum thickness of the head, moves outwards along the upper surface of the web until reaching the bottom of the web; the web second path starts from the end point of the head first path, moves along the length direction of the double-head flat-bulb steel until reaching the start point of the web third path, and completes the angle conversion of the torch during the movement. The step of controlling the cutting torch to complete the angle transformation of the cutting torch in a uniform and gradual manner during the movement between two adjacent position points includes: during the cutting process, controlling the cutting torch according to the position point-angle value (i, θ) i Adjust the angle at two adjacent different positions - angle value (i, θ) i The average interpolation method is used between the two, and the cutting torch angle changes uniformly and gradually during the movement.

2. The method of finishing the end of a billet according to claim 1, wherein When the ball head groove type is I groove, V groove or A groove, the cutting torch only executes the first segment path of the ball head, the cutting torch angle direction is one of straight cutting, tangent cutting and reverse cutting, the cutting torch performs arc cutting at the starting point of the first segment path of the ball head, and the cutting torch is extinguished at the end point of the first segment path of the ball head to complete the ball head processing; when the ball head groove type is X groove, Y groove or inverted Y groove, the cutting torch consecutively executes the first segment path, the second segment path and the third segment path of the ball head, the cutting torch adopts different angle directions on the first segment path and the third segment path of the ball head, the cutting torch angle direction is one of straight cutting, tangent cutting and reverse cutting, and the sequence of the cutting torch angle direction is: reverse cutting→ straight cutting→ tangent cutting; the cutting torch changes the angle direction on the second segment path of the ball head from the angle direction of the first segment path to the angle direction of the third segment path.

3. The double-bulb ball flat end processing method according to claim 1, characterized by, When the web groove type is I groove, V groove or A groove, the cutting torch only executes the first segment path of the web, the cutting torch angle direction is one of straight cutting, tangent cutting and reverse cutting, the cutting torch performs arc cutting at the starting point of the first segment path of the web, and the cutting torch is extinguished at the end point of the first segment path of the web to complete the web processing; when the web groove type is X groove, Y groove or inverted Y groove, the cutting torch consecutively executes the first segment path, the second segment path and the third segment path of the web, the cutting torch adopts different angle directions on the first segment path and the third segment path of the web, the cutting torch angle direction is one of straight cutting, tangent cutting and reverse cutting, and the sequence of the cutting torch angle direction is: reverse cutting→ straight cutting→ tangent cutting; the cutting torch changes the angle direction on the second segment path of the web from the angle direction of the first segment path to the angle direction of the third segment path.

4. The method according to claim 2 or 3, characterized in that When the cutting torch angle direction is straight cutting, the central axis of the cutting torch is perpendicular to the plane of the plate, and the cutting torch angle value is 0°; when the cutting torch angle direction is tangent cutting, the included angle between the central axis of the cutting torch and the plane of the plate is less than 90°, and the cutting torch angle value is greater than 0°; when the cutting torch angle direction is reverse cutting, the included angle between the central axis of the cutting torch and the plane of the plate is greater than 90°, and the cutting torch angle value is less than 0°.

5. The double-bulb ball flat end processing method according to claim 1, characterized by, The cutting torch adopts small current-low speed plasma cutting on the ball head, the cutting current is 160-200 A, and the cutting speed is 1200-1900 mm / min.

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