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Processing method of thin wall parts

Thin-walled parts are widely used in the industrial sector, but their rigidity is weak, the processing of deformation is difficult to control, through the improvement of traditional cutting methods and the application of CNC compensation cutting, high-speed cutting and vibration cutting, are able to play well to better processing accuracy requirements. The characteristics of thin-walled parts Thin zero-walled parts with light quality, material saving, compact structure and other characteristics, in the aviation, automotive, machinery and other industrial sectors have been widely used. But the thin-walled parts of its poor rigidity, weak strength, deformation in the processing is difficult to control, […]

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Research on processing technology of monel thin wall parts

As an ultra-thin wall shell structure, the overall dimension of the cold screen φ 20mm × 14mm, with a wall thickness of about 0.2mm. The part is composed of multiple step circles, two deep inner ring grooves, conical surfaces and two bosses. The diaphragm in the middle of the inner ring groove is only 0.25mm thick. The structure is very complex. At the same time, it requires high precision and is very difficult to process. After repeated analysis, a unique solution is found. Part analysis The grade is NCu30-4-2-1 Monel bar. It is an alloy made of metal nickel as […]

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Causes and prevention of tube bundle vibration of heat exchanger

Vibration of heat exchanger With the expansion of production scale, the size of heat exchanger, fluid flow rate and support span increase, even exceeding the allowable limit, thus reducing the rigidity of tube bundle and increasing the possibility of vibration. Vibration can make the pipe leak, wear, fatigue, fracture, and even accompanied by harsh noise, which not only reduces the service life of the equipment, but also damages people’s health. Once an accident is caused by vibration, it often takes a long time to analyze and repair. Because the factors affecting vibration are complex, the magnitude of damping effect is […]

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Selection of flange sealing gasket in gas system

Gasket seal is the most common static seal form of industrial devices, and leakage is the most common failure form of production devices in many industrial production processes. According to statistics, 60-80% of the unplanned maintenance workload in petrochemical enterprises is used to repair sealing devices. With the development of modern industrial production, various industrial departments, especially large petrochemical enterprises, thermal power plants, nuclear power plants and other industrial enterprises, put forward higher and higher requirements for the performance of sealing gaskets. The fuel gas system is no exception. Due to the flammable, explosive and toxic characteristics of fuel gas, […]

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12 super classic bolt locking designs

There are three commonly used locking methods: friction locking, mechanical locking and permanent locking. Mechanical locking and friction locking are called detachable locking, while permanent locking is called non detachable locking. Common permanent locking methods include spot welding, riveting, bonding, etc. this method mostly destroys threaded fasteners during disassembly and cannot be reused. Common friction locking are: using gasket, self-locking nut and double nut, etc. Common mechanical locking methods: use cotter pin, stop gasket and string steel wire rope. Purpose of prevention: it can work more effectively for a long time and improve the reliability of relevant components. Today, let’s […]

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How to solve the problem that the inner end face of thin flange is easy to be ……

The flange shaft is shown in Figure 1, with a material of 40Cr and a total length of 215 mm. the diameter of the shaft body part is 60 mm, the length is 210 mm, the cylindrical outer surface is quenched, the depth of the hardened layer is 1-3 mm, and the hardness is 45-50 HRC. the flange part has a diameter of 90 mm, the thickness is only 5 mm, the inner end surface is quenched, the depth of the hardened layer is 1-3 mm, and the hardness is 45-50 HRC. induction The quenching method is vertical scanning quenching, […]

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Welding process and method of large diameter flange

In the welding construction of large-diameter flange, although there is only one weld junction, X-shaped groove is adopted in consideration of welding deformation and welding quality. Asymmetric x-groove Firstly, fix the annular blank horizontally on the gantry fixture platform, and then conduct groove processing. The groove processing is first cut by flame and then ground by grinder. The groove surface is required to be smooth, flat and free of obvious grooves, and there are no defects such as iron oxide, impurities, moisture, oil stains and delamination on on the groove surface and both sides. Due to the thick thickness of […]

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Pressure test of process pipeline

What is pressure test of process pipeline? Pressure testing of process pipeline is an important process in the construction of the project, which is to check whether the pipeline installation is in line with the process, whether there are unsafe hidden dangers, the quality of pipeline construction and other issues. The specific steps of pressure testing of process piping are as follows: Division of test pressure package The test pressure of the pipeline system is divided into several test pressure packages according to the general flow chart of the pipeline and instrumentation. In accordance with the principle of covering all […]

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Installation and construction steps of copper pipes

Process overview The installation and construction of copper pipes should be developed before the start of the scientific process to ensure that the construction process is up to standard. Share the installation and construction steps of copper pipes commonly used in our factory. Copper pipe straightening → cutting → pipe prefabrication → pipe installation → pipe pressure test → insulation → pipe flushing → system water The installation steps of copper pipe detailed explanation Straightening of copper pipes (1). Copper channel straightening should be filled with sand, and then straightened with a straightener; sand-filled copper pipe can also be placed […]

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Ramble on about welding deformation of channel bars

During welding, the high temperature molten iron shrinks during solidification, leading to the deformation of channel bars, which has been a headache for all steel structure practitioners. Therefore, when the production of general channel bars is completed, their deformation should be measured. If it exceeds the allowable tolerance range, rectification work should be done [1](Photo 1). In serious cases, even channel bars can only be scrapped. Therefore, the control of deformation, in the factory’s manufacturing quality control, occupies a very important channel bar. To control deformation, the basic principle is to reduce the internal stress, or to give enough beam, […]

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