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Several thread processing methods commonly used in CNC machining center

Thread processing is one of the most important applications in CNC machining center. The quality and efficiency of thread processing will directly affect the machining quality of parts and the production efficiency of machining center. With the improvement of CNC machining center performance and cutting tool, the thread processing method is also improving, and the precision and efficiency of thread processing are also gradually improved. In order to make the technicians choose the thread processing method reasonably, improve the production efficiency and avoid quality accidents, the following several thread processing methods commonly used in CNC machining center are summarized as […]

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Passivation and pitting of 316L and HR-2 stainless steels in hydrochloric acid……

Based on a self-designed and assembled hydrochloric acid liquid film corrosion simulation device, corrosion coupon, resistance probe, Tafel polarization and electrochemical impedance spectroscopy were used to study the corrosion behavior of 316L and HR-2 stainless steel at the concentrations of 1, 0.5 and 0.1 mol / L and temperatures of 90, 70 and 60, respectively The passivation and pitting corrosion behaviors of the samples were studied in hydrochloric acid vapor environment. The corrosion samples and products were analyzed by metallographic microscope and XRD. The results show that: the corrosion rates of the two kinds of stainless steels first accelerate, then […]

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Dynamic seal and static seal of valve

The sealing problem of the valve can not be ignored, because the valve running, emitting, dripping, leakage phenomenon, the vast majority occurs here. This paper will discuss the valve dynamic seal, static seal related issues. Dynamic seal The dynamic seal of valve mainly refers to the stem seal. It is the key to solve the dynamic sealing problem of valve to prevent the medium in the valve from leaking with the movement of valve stem. (1) Stuffing box form at present, valve dynamic seal, mainly to stuffing box. The basic form of stuffing box is: (a) Gland type: This is […]

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New technology of acid pickling of high efficiency and low consumption and env……

The treatment process of stainless steel plate pickling is complex, involving many kinds of process medium, toxic, corrosive, strong oxidation and high solid content of wastewater. This paper introduces the new technology of ultrasonic and electrolysis to treat strip steel, and the measures of ultrasonic mud transportation and energy medium recycling are introduced. It not only improves the electrolysis efficiency, prolongs the life of electrode plate and other equipment, but also realizes zero emission of effective medium. The acid mixing system adopts the injection technology at the bottom of the pickling tank and the measures of recycling energy medium, which […]

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How to calculate the wave node number of expansion joint

The expansion has been calculated: Expansion = total thermal expansion length x temperature difference x safety factor x expansion coefficient How to calculate the wave node number of expansion joint according to the expansion amount? According to the expansion, the wave number of the corrugated compensator is calculated. According to the wave height and wave distance of each manufacturer, the wave number is uncertain. How to calculate the weight of expansion joint? The pressure and compensation of the expansion joint are different, and the weight will be different. The factory can calculate the theoretical weight according to the specific parameters […]

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What is a sputtering target

What is a sputtering target? Sputtering target: the source material of sputtering film preparation, also known as sputtering target, especially the high purity sputtering target, which is used in the physical vapor deposition (PVD) process of electronic components manufacturing, is the key material for the preparation of wafer, panel, solar cell and other surface electronic thin films. In vacuum state, the solid surface is bombarded with accelerated ions, and the ions exchange momentum with the atoms on the solid surface, so that the atoms on the solid surface leave the solid and deposit on the substrate surface to form the […]

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Technical requirements of bend and analysis of factors affecting bend quality

The pipe bend is bent by complete set of bending equipment, which is divided into two processes: cold simmer and hot push. No matter what kind of machinery, equipment, pipeline, most of the pipe bend, mainly used for oil, gas, infusion, engineering bridge construction, etc.. Pipe bend is produced step by step, and then made into finished products, in the whole production process, because of the requirements of the pipe must be bent, and the bending of the pipe to have some technology, the degree of bending is not the same, so in the whole production process used in the […]

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Tantalum Product Range

What is tantalum Tantalum is a metal element with atomic number 73 and chemical symbol TA. The element corresponds to steel gray metal, which has high corrosion resistance. It does not react with hydrochloric acid, concentrated nitric acid and aqua regia under cold and hot conditions. Tantalum mainly exists in tantalite and coexists with niobium. Tantalum has moderate hardness and ductility, and can be drawn into thin foil. Its coefficient of thermal expansion is very small. Tantalum has excellent chemical properties and high corrosion resistance. It can also be used as electrode, rectifier and electrolytic capacitor of electron tube. Medically, […]

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What is a quick closing valve

What is a quick closing valve? Quick closing valve, also known as the main steam valve, is the main closing mechanism between the main steam pipeline and the steam turbine. In case of emergency, the steam inlet of the steam turbine is cut off to make the unit shut down quickly, so as to achieve the purpose of protecting the unit. The quick closing valve consists of valve body and oil cylinder. In the process of operation, the quick closing valve keeps open through quick closing oil to overcome the resistance of spring. When the quick closing oil loses pressure, […]

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What are the factors that affect the price of flange?

Flange is an essential part of pipe design, pipe fittings and valves, and also a component used in equipment and equipment components (such as manhole, observation hole, liquid level gauge, etc.). We also know that flange is divided into standard flange and non-standard flange. The national standard flange is processed according to the national flange production standard. The outer diameter, screw hole and thickness of flange are fixed, but in the actual flange production process, many companies will customize the flange (non-standard flange), so is the price of customized flange expensive? To understand the price of flange, you must first […]

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