A cutting method for intersecting lines of a tube sheet

Abstract

The application relates to a pipe plate intersecting line cutting method and relates to the technical field of wall plate hole processing. The method comprises the following steps: blanking according to the lofting of a process drawing to obtain the intersection part of two ellipses of a wall plate; lofting the upper and lower ellipse holes, then performing FASTCAM programming, copying G codes to a portable numerical control cutting machine; placing the wall plate to be cut on a jig frame, adjusting the level; placing the track of the portable numerical control cutting machine in parallel to the long axis direction of the wall plate ellipse hole, placing the portable numerical control cutting machine on the track; measuring the corresponding length in the thickness length direction of the wall plate according to the height difference distance of the two ellipses, drawing a perpendicular line, connecting the perpendicular line into a triangle, and the hypotenuse is a nozzle inclination angle line; preheating the part to be cut; returning the portable numerical control cutting machine to the short axis origin, adjusting the air pressure to start cutting, preheating and cutting simultaneously until the cutting is completed. The application can effectively solve the problems of low working efficiency and poor precision in the pipe plate intersecting line processing of the prior art.

Description

Technical Field

[0001] This invention relates to the field of wall panel hole processing technology, specifically a cutting method for intersecting lines of tube sheets. Background Technology

[0002] In my country's large steel structure bridges, steel towers are one of the most common structural forms, and the processing method of the holes in the steel tower panels is of paramount importance. The steel tower panels intersect the anchor boxes and anchor pipes at non-right angles, forming two ellipses of equal size but misaligned vertically on the inner and outer surfaces of the panels. The most common methods are: first, cutting the material to create the intersection of the two ellipses, then using an air gouging gun to plan the intersecting bevel; or second, cutting the material to create the union of the two ellipses, then using small crescent-shaped iron pieces to fill the gaps in the intersecting wall. The former method, using manual planing, results in poor smoothness of the bevel, requires high skill levels, involves a large amount of welding and grinding work, is time-consuming, and has poor precision. The latter method involves difficult welding and filling, a large amount of work to adjust the angle of the steel pipes, and is also difficult and has poor precision. Both methods are inefficient and inaccurate, and cannot meet the needs and quality requirements of mass production of steel beams.

[0003] Therefore, how to provide a cutting method that can quickly and efficiently complete the cutting process while ensuring the required installation accuracy is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a cutting method for intersecting lines of tube sheets, which can effectively solve the problems of low processing efficiency and poor precision in the processing of intersecting lines of tube sheets in existing technologies.

[0005] To achieve the above objectives, the present invention provides a cutting method for intersecting lines of tube sheets, comprising the following steps:

[0006] Step S1: Lay out the material at the intersection of the two ellipses of the wall panel according to the process drawings;

[0007] Step S2: After laying out the two elliptical holes using CAD, select one hole for FASTCAM programming, export the program G code, and copy the exported G code to the portable CNC cutting machine.

[0008] Step S3: Place the wall panel to be cut on the jig, adjust the level, and fix the wall panel to prevent it from moving; place the track of the portable CNC cutting machine parallel to the long axis of the elliptical hole of the wall panel, and then place the portable CNC cutting machine on the track.

[0009] Step S4: After the instrument is in place, measure the corresponding length in the thickness direction of the wall panel according to the height difference between the two ellipses, draw a vertical line, connect them to form a triangle, with the hypotenuse being the nozzle tilt angle line, and preheat the part to be cut according to the route.

[0010] Step S5: After preheating, return the portable CNC cutting machine to the short axis origin, adjust the air pressure according to the length of the part to be cut, and start cutting while preheating until the cutting is completed.

[0011] Furthermore, in step S1, a CNC cutting machine or plasma cutting is used to cut the material at the intersection of the two ellipses of the wall panel.

[0012] Furthermore, step S2 also includes: according to the direction of the steel pipe being inserted into the wall panel, drawing lines on the four contour points of the major and minor axes of the upper elliptical hole, wherein the lowest point of the upper elliptical hole coincides with the lowest point of the hole in the wall panel.

[0013] Furthermore, in step S3, before placing the portable CNC cutting machine on the track, a track counterweight is added.

[0014] Furthermore, in step S4, the nozzle of the portable CNC cutting machine is placed at the lower right point of the rectangular scribed area, and the machine is driven a short distance without cutting. The power is then reduced, and the cutting path is rehearsed. After confirming that the path is correct, the area to be cut is preheated according to the path to prevent incomplete cutting.

[0015] The beneficial effects of this invention are as follows:

[0016] 1) The use of small cutting equipment and programming software to cut the intersecting lines of plates and tubes avoids the traditional methods of hand planing and patching, reducing manual labor and improving work efficiency.

[0017] 2) This construction method ensures the cutting accuracy of the intersection line, thereby ensuring the accuracy of the anchor pipe angle installation.

[0018] 3) This method achieves a smooth and defect-free cut surface, avoiding the welding and grinding processes required by traditional methods, improving work efficiency, and reducing the amount of steel and welding materials needed for patching, thus saving costs. Attached Figure Description

[0019] Figure 1 This is a flowchart of the method of the present invention;

[0020] Figure 2 This is a plan view of the wall panel cutting position of the present invention;

[0021] Figure 3 This is a schematic diagram of the programming trajectory for the elliptical hole in this invention;

[0022] Figure 4 This is a plan view of the intersection line of the tube sheet of the present invention;

[0023] Figure 5 This is a side view of the intersection line of the tube sheet of the present invention;

[0024] Figure 6 The present invention provides the meaning of intersecting line cutting finished product. Figure 1 ;

[0025] Figure 7 The present invention provides the meaning of intersecting line cutting finished product. Figure 2 . Detailed Implementation

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0029] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0031] like Figure 1 As shown, the present invention provides a cutting method for intersecting lines of tube sheets, comprising the following steps:

[0032] Step S1: According to the process drawings, lay out the material at the intersection of the two ellipses of the wall panel, such as... Figure 2 As shown;

[0033] Step S2, after using CAD to lay out the upper and lower elliptical holes, as shown... Figure 3 As shown, select any hole for FASTCAM programming, export the program G code, and copy the exported G code (TXT format) to the portable cutting machine using a USB flash drive;

[0034] Step S3: Place the wall panel to be cut on the jig, adjust the level, and fix the wall panel to prevent it from moving; place the track of the portable CNC cutting machine parallel to the long axis of the elliptical hole of the wall panel, and then place the portable CNC cutting machine on the track.

[0035] Step S4: After the instrument is in place, measure the corresponding length along the thickness of the wall panel based on the height difference between the two ellipses. Figure 4 and 5 As shown, draw vertical lines and connect them to form a triangle, with the hypotenuse being the nozzle tilt angle line. Preheat the area to be cut according to the route.

[0036] Step S5: After preheating, return the portable CNC cutting machine to the short axis origin. Starting cutting from this position has the advantage of reducing the thickness and size of the area to be cut at the intersection of the two ellipses, thus avoiding overheating of the panel and reducing the amount of welding and grinding work. Adjust the air pressure according to the length and thickness of the area to be cut, and begin cutting while preheating until the cutting is complete. Figure 6 and Figure 7 As shown.

[0037] To further optimize the technical solution, in step S1, a CNC cutting machine or plasma cutting is used to cut the material at the intersection of the two ellipses of the wall panel.

[0038] To further optimize the technical solution, step S2 also includes: according to the direction of the steel pipe being inserted into the wall panel, drawing lines on the four contour points of the major and minor axes of the upper elliptical hole, wherein the lowest point of the upper elliptical hole coincides with the lowest point of the hole in the wall panel.

[0039] To further optimize the technical solution, in step S3, in order to prevent the track from moving during cutting, the track can be counterweighted if necessary, and then the portable CNC cutting machine can be placed on the track.

[0040] To further optimize the technical solution, in step S4, in order to ensure the cutting accuracy, the nozzle of the portable CNC cutting machine is placed at the lower right point of the rectangular scribing area, and it is allowed to travel a distance without moving. The firepower is then reduced, and the cutting path is rehearsed. After confirming that the path is correct, the area to be cut is preheated according to the path to prevent incomplete cutting.

[0041] This invention utilizes small-scale cutting equipment and programming software to cut the intersection lines of plates and tubes, avoiding the traditional methods of hand planing and patching, reducing labor costs and improving work efficiency. This method ensures the cutting accuracy of the intersection lines, thereby guaranteeing the accuracy of the anchor pipe angle installation. The method achieves a smooth, defect-free cut surface, avoiding the welding and grinding processes required by traditional methods, thus improving efficiency. The efficiency of traditional manual planing and patching is approximately 0.5 pieces / hour, while this method increases it to 3 pieces / hour. It also reduces the amount of steel and welding materials required for patching, saving costs. The key to this invention is ensuring the accuracy of the intersection line cutting, which guarantees the matching requirements of subsequent assembly between rods. It can also be used to cut similar parts and rods in the future.

[0042] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method for cutting intersecting lines of tube sheets, characterized in that, Includes the following steps: Step S1: Lay out the material at the intersection of the two ellipses of the wall panel according to the process drawings; Step S2: After laying out the two elliptical holes using CAD, select one hole for FASTCAM programming, export the program G code, and copy the exported G code to the portable CNC cutting machine. Step S2 also includes: according to the direction of the steel pipe being inserted into the wall panel, marking the four contour points of the major and minor axes of the upper elliptical hole, wherein the lowest point of the upper elliptical hole coincides with the lowest point of the hole in the wall panel; Step S3: Place the wall panel to be cut on the jig, adjust the level, and fix the wall panel to prevent it from moving; place the track of the portable CNC cutting machine parallel to the long axis of the elliptical hole of the wall panel, and then place the portable CNC cutting machine on the track. Step S4: After the instrument is in place, measure the corresponding length along the thickness of the wall panel according to the height difference between the two ellipses, draw a vertical line, connect them to form a triangle, with the hypotenuse being the nozzle tilt angle line, and preheat the part to be cut according to the route; In step S4, place the nozzle of the portable CNC cutting machine at the lower right point of the rectangular scribed area, walk a distance without cutting, reduce the firepower, and rehearse the cutting route. After confirming that the route is correct, preheat the part to be cut according to the route to prevent incomplete cutting. Step S5: After preheating, return the portable CNC cutting machine to the short axis origin, adjust the air pressure according to the length of the part to be cut, and start cutting while preheating until the cutting is completed.

2. The cutting method for intersecting lines of tube sheets as described in claim 1, characterized in that, In step S1, a CNC cutting machine or plasma cutting is used to cut the material at the intersection of the two ellipses of the wall panel.

3. The cutting method for intersecting lines of tube sheets as described in claim 2, characterized in that, In step S3, before placing the portable CNC cutting machine on the track, add track counterweights.

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