With the continuous development of metal manufacturing, CNC flame cutting technology has been widely used in the production of rivet weldments. In order to shorten the gap between the same industry and improve the overall quality of the welding parts, the application of CNC flame cutting technology is imminent. The application of this technology, embodied in the CNC flame cutting machine, can not only improve the overall quality of the rivet weldment, but also greatly reduce the labor intensity of workers, saving time for the production of various spare parts and spare parts.
CNC flame cutting technology has the characteristics of high cutting precision, good appearance quality, fuel saving, reasonable overall material layout and high automation. Now, from the following aspects, the application of CNC cutting technology in the production process of rivet weldment is expounded.
2 CNC cutting technology application platform CNC cutting technology is applied to CNC cutting machine. The whole process of CNC cutting machine is the concrete embodiment of CNC cutting technology. With wnds5/98/NT/2000/Me/XP as the operating platform, the main use of AutoCAD for drawing, IMGNPSV6 programming software, general layout system 20 for blanking layout.
3 Application of CNC cutting machine cutting process 31 Preparation before cutting 311 drawing After receiving the blanking pattern, carefully review, according to the characteristics of the pattern, using AutoCAD drawing software for drawing, using computer graphics can improve accuracy, avoiding manual manual The dimensional deviation caused by the drawing.
The 312 typesetting uses the general layout system 20 software to perform typesetting according to the single pattern drawn and the existing sheet form, and the use of the software layout avoids waste of materials and improves material utilization. In order to more intuitively show the advantages of this layout software, three examples are used to illustrate. The software can be used not only for the blanking of steel sheets, but also for the blanking of stone and wood.
313 programming eybee software for NC programming, the boundary of the pattern that can be borrowed line 1: Liu Zhongguang, male, born in 1978, college degree, is now the operation plan of Tonghua Iron and Steel Company's electromechanical repair company, assistant engineer, thus saving the original Fuel, which increases work efficiency. For example, in the blanking of the spare parts of the steelmaking plant, different preheating time, cutting speed, cutting compensation amount, cutting point, lead-in length, lead-out line length, etc. are given according to the thickness of the plate. The specific figures and parameters are shown in Table 1. (Note: the small point on the figure is the point of entry). The blanking plate is laid on the plate of the CNC gas cutting machine. The edge of the steel plate is required to be basically parallel with the track of the CNC cutting machine. The error is better than ~4. Table 1 Numerical control programming data a cable table (empirical data) plate thickness / mm preheating time / s cutting speed / mm / mn cutting compensation amount / mm lead wire length / mm lead wire length / m 315 auxiliary work will pipeline oxygen The pressure reducer and the acetylene pressure reducer are opened, the oxygen pressure is adjusted to <05MP, and the propylene pressure is <005MP. After the pressure is adjusted, the secondary pressure reducing valve is opened to adjust the cutting nozzle to be perpendicular to the plate surface.
2 After cutting other work, the ignition is cut. The cutting process is prone to breakage. The phenomenon of cutting is mainly caused by serious corrosion of the steel plate or interference by external force. At this time, adjust the cutting nozzle to the cutting point and re-cut.
4 The application of CNC flame cutting technology 1 The application of CNC cutting technology in cutting steel ladle hooks 120 hooks are the main lifting tools for steel ladle in steelworks. When the original riveting hooks are made, it is necessary to make iron samples. Manual cutting and cutting, steel plate with a width of 22X 6000, only 8 pieces of hook plate, and the appearance size is uneven, and the hook plate needs to be machined, which is time-consuming and laborious. After applying CNC cutting technology, the steel plate with the width of 22X2000X60(1) can be used for 10 pieces of hook plates (for example) with the same size and appearance, and the surrounding cutting quality is good. At the same time, the machining at the hook plate is eliminated, the turnover sequence is reduced, and the saving is saved. Raw materials reduce the difficulty of grouping, improve work efficiency, and reduce the labor intensity of workers.
The application of 42 CNC cutting technology on the cutting steelmaking slag anchor is the spare part used by the steelmaking plant for slag slag. It is made up of 40, 50mm60mm steel plates. The single weight is 36t manual cutting and cutting. Prefabricated samples, and the quality of the surrounding material is poor, it is not convenient to set up; after adopting the CNC cutting technology, the pre-made sample is not used, the automatic layout and the surrounding quality of the blanking are good, the group pair is easier, the labor intensity of the workers is reduced, and the labor is improved. Work efficiency.
The use of CNC cutting technology to cut shaped parts saves time and ensures the appearance quality. For example, billet clamps for steelmaking and clamp clamps require roughness Ra25 for the periphery. The precision needs to be machined, but CNC flame cutting is used. After the technology, the surrounding material can be completely tightened. When the saw bridge assembly is lifted, the T-bolt will prevent the column from slipping off the stand.
464 saw bridge assembly installation saw bridge assembly is hoisted smoothly, using the forklift and chain hoist, the saw blade drive motor is suspended below the saw bridge. Be careful to maintain the verticality of the two columns when lifting, so as to ensure that the saw bridge assembly can be smoothly docked with the lift cylinder and the column chassis on the support base. After the whole position, fix the saw bridge assembly with temporary support, and then unhook; after the upper clamping roller is installed, fix the top of the column to remove the temporary support; The point is to ensure that the verticality of the two columns in any direction is within 001000.
Finally, auxiliary equipment such as blade replacement device and sawdust collection are installed.
47 Clamping Roller Assembly The clamping roller device is the power unit of the casting machine. The casting speed is controlled by it. The quality of the inlay will affect the quality of the ingot and the shape of the ingot. It is an important main equipment.
471 Clamping roller device bottom plate installation The foundation of the clamping roller device is located on a small platform on both sides of a 5270 in the casting well. After the foundation pad is buried, the two bearing plates with a thickness of 60 mm can be placed in position and corrected. Positive accuracy requirements: vertical and horizontal centerline allowable deviation 075mm horizontal tolerance in both directions 0 3 8 000 elevation allowable deviation 10 472 clamping roller device assembly Due to the small space inside the casting well, it is not convenient to install parts, clamping roller The device is to be assembled on the ground with parts such as rollers and hydraulic cylinders, as well as hydraulic pipes and dry oil lubrication pipes.
Lifting and technical requirements of 473 nip roller assembly 1) The total weight of the nip roller assembly is about 40t and the rated lifting capacity of the workshop is 35t. Only two vehicles can be lifted into position. When the nip roller assembly is in place, pay attention to the top of the two columns of the saw bridge and smoothly fit into the bottom of the nip roller frame. After the position is fully seated, the bolts at the ends and the bottom plate can be hooked.
2) Perform the fine alignment on the nip roller assembly again. The vertical and horizontal center lines are allowed to be offset by 075mm. The verticality and spacing of the four sets of rollers are corrected. The best method is to process a “test ingot†and let the four groups roll. The child is simultaneously clamped.
48 Crystallizer trolley installation The crystallizer trolley system consists of a crystallizer, a trolley, a trolley locking device and a trolley track; they are mounted on a 00 crystallizer steel platform. When the crystallizer is working, it is placed on the trolley and fixed by the positioning pin; the function of the trolley locking device is to fix the trolley to the working position required by the design; the crystallizer trolley has two sets of transmission devices, and the other is the vibration used when the crystallizer works. The device, the second is the walking device between the working position and the inspection position of the trolley.
When installing, first ensure that the center, elevation and level error of the trolley track are within the specified range, then place the trolley in the working position and fix it tightly.
The installation of auxiliary equipment such as roller conveyor, hoisting, hydraulic pressure, water cooling tank and collection and ventilation must meet relevant standards and specifications.
5 Conclusion The continuous continuous casting machine is installed in a deep well with a depth of 19m. Some equipment and rails are installed vertically along the well wall. Due to the small space and darkness in the hoistway, it is inconvenient to install and align the equipment. Compared with the continuous casting machine of copper ingot and the curved billet continuous casting machine, the installation accuracy is higher and the construction difficulty is greater.
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