Article List
- Forging process of automobile axle shaft blankBelow small make up to introduce the introduction of the forging process of automobile axle shaft blank.1. Process improvementUnder the condition of the original process, due to the quenching temperature is low, a large amount of alloy carbides dissolved, so after quenching hardness is low, only 20 ~ 25 HRC, make through the secondary hardening tempering hardness reached more than 30 HRC, such mould toughness can be, but after work soon appear thermal fatigue, thermal wear serious, life is not high.Improvement process to improve the quenching temperature, the carbide alloy has a lot of dissolved, but formed during tempering diffuse distribution of hard phase in great quantities, cause mould although fatigue resistance increased, but the impact toughness is decreased, the mold after the use of more than 100 JianCi split into 3 pieces.The plan won't work.Again after improvement process, after fully preheat, interrupted quenching after high temperature insulation 0.5 h, after high temperaIndustry News August 29, 2016
- Mechanical processing and surface treatment of the original so many requirementsNow the machining process generally have requirement on surface treatment, some even more demanding.Machined part surface treatment, also is the important link in machining, the use of late because it is related to the job performance, is the assembly parts, may affect the assembly process.Different materials, choose the same surface treatment, processing and the effect is distinct.So, in order to meet the requirements of surface effect, the choice of raw materials is also very important.Such as cold rolled steel and hot rolled steel, adopt different surface treatment methods.Processing equipment is has a great influence on the surface of the machined part, advanced equipment and tool could achieve better results than expected.The factors affecting the surface of the machined part at the core, when processing technology.Some materials need to heat treatment before processing, as usual for quenched and tempered 45 # steel, after the processing will have different surface effect.AdditionIndustry News August 26, 2016
- Have you ever seen such flange forging?The use of large diameter flange range although there is no ordinary flange widely, but it is also due to the difference of using the environment can be divided into different kinds.The most common in the field of mechanical manufacturing large diameter flange there are two main types, namely, flat welding flange, flange and butt weld ends with flat welding flange production the most.The two flange structure difference is bigger, use scope also has its own specific.Flat welding flange is much less rigid than the butt welding flange, so it used the occasion of high temperature and pressure also without the latter, butt welding flange has another name called high neck flange, for large diameter flange sealing surface of the industry is mainly divided into planar and concave and convex type, mainly in the production of flange, is according to the different use of large diameter flange environment and temperature level to determine its sealing surface forms.Production technology of large dIndustry News August 26, 2016
- Mechanical processing lean ten pointsMechanical processing industry as a child of the industrial machinery industry, also is one of basic industries, the stand or fall of its management level, directly affect the overall mechanical industry competition ability of our country.More than 30 years of reform and opening-up has been in the past, extensive economy is bound to lean transformation, not we want to turn, but we have to make.Now, simply summed up in the machining industry, the implementation of lean production profile at ten o 'clock.1. Environment must understand thoroughly and brightMany people visit to machining industry company, the impression is generally not very good, the feeling is full of noise, pollution, garbage, dust, smoke, dimly lit...In which, not to mention the daily staff?80 years ago in the west hawthorne Mayo experiments would tell us the importance of the environment on site management, environment has strong implications for the person's psychology effect, psychology has a direct impact on peopleIndustry News August 25, 2016
- The advantage of fixed ball valveFixed ball valve, is a new generation of high-performance ball valve, suitable for long distance pipeline and general industrial pipeline, its strength, security, and resistance to bad environment, special consideration when the design is suitable for all kinds of corrosive and non corrosive medium.The small make up to introduce the advantages of fixed ball valve.1, sealing emergency greasing rescue: seat tightness due to medium foreign body or fire accident failure, greasing valve provides a connection to a quick note grease gun, convenient and quick to sealing grease injection to the valve seat sealing parts, reduce leakage.2, reliable stem seal and low operating torque: in addition to setting the standard of sealing ring, the packing gland is also equipped with the "O" type sealing ring, double seal to ensure the reliability of the stem seal;Adding graphite packing and sealing grease injection makes the valve stem leakage after the fire to a minimum.Sliding bearing and thrust bearinIndustry News August 25, 2016
- How to determine the types of ball valveDifferent cases, the ball valve types and models of choice.1) Oil, natural gas transportation director line, need to clean the pipeline, and to be buried in the ground, selection of full size, full welded ball valve structure;Buried in the ground, choose the full size welded ball valve connection or flange connection;Branch, choose flange connection, welding connection, full size or reducing valves.2) Product oil pipeline and storage equipment, use flange connection of the ball.3) City of coal gas and natural gas pipelines, selection of flange connection and internal thread connection of floating ball valves.4) Metallurgical system on the oxygen in the pipeline system, appropriate chooses strict degreasing process, flange connection of the fixed ball ball valve.5) The piping system and device of medium to low temperature, appropriate chooses and cryogenic ball valve bonnet.6) Refining unit of catalytic cracking unit of piping system, can choose lifting lever type ball valve.7) ChemicalIndustry News August 24, 2016
- Analysis and elimination of common faults of diesel engine partsDiesel fuel except for precision parts of early wear, resulting in power drop, exhaust smoke and fuel consumption increase, the most prone to failure has two kinds: a kind is due to the fuel injection pump is not installed properly, resulting in failure, the other is does not have the correct use of machine malfunction.Malfunction caused by improper installation of fuel injection pump(1) key installsFuel injection pump for use the flange plate connection of, when the oil timing gear and fuel supply advance angle automatically adjust device and fuel injection pump cam shaft woodruff key installation position is not correct, fuel is lost quasi then occurs. The engine is difficult to start, smoking, high water temperature fault phenomenon. If the arc hole on the flange plate can not be adjusted, it is necessary to remove the fuel injection pump to re install. Remove the rear can be observed clearly on the indentation key.(2) 180 degrees passive complexWhen the fuel injection pump with croIndustry News July 27, 2016
- How to choose the iron removerIn addition to the iron to be used in many industries, but the separator equipment should be how to choose?Some things to consider the factors in choice except iron include: is conveyor belt conveyor, belt speed, bandwidth, angle, characteristics of grain size and the nature of the material humidity, properties, thickness, grain size, iron in the material contained in the weight, a ferromagnetic material, in addition to iron requirements, use of the environment (temperature, humidity, dust, corrosion of etc.), the machine itself, machine installation selected location etc..When the iron content is more in the material, continuously and automatically except electromagnetic iron separator is the best choice. When the iron in the material in less content and manual unloading of iron suspension type electromagnetic iron remover, permanent magnetic separator is the best choice. When the ferromagnetic material in the material content, especially small, metal detector and strong magnetic selfIndustry News July 25, 2016
- Hydraulic pump, plunger pump damageThe use of a certain period of time, the parts of the hydraulic pump will gradually wear even damaged, it will reduce the pump running precision and performance, oil pressure not hit up, reduce the amount of oil, increased noise, vibration increases and so on each kind of abnormal phenomenon will the resulting.Hydraulic pump in daily use, the installation of the pump, oil, operation of the exclusion of failure if you can master, hydraulic pump parts wear or avoid damage can be greatly eased.Reasons for damage of hydraulic pump(1) wear and tearThe wear of hydraulic pump parts, like any part of the equipment, is the inevitable result of the mechanical operation. Under normal conditions of use, due to friction and chemical reaction and other factors, the long-term effect of wear and tear, which belongs to the natural wear and tear. This wear is not eliminated and avoided, but through careful maintenance and proper use of the pump, wear can be delayed, prolonged wear cycle.The causes and pIndustry News July 21, 2016
- Fully welded ball valve must pay attention to the use of small knowledgeSuperior quality and strong performance and stability, and other aspects are all welded ball valve has, are common cast steel ball valve can not be alongside. Can be used in a variety of harsh environments, such as petroleum, chemical, power station, iron and steel industries, in use process, some details is must pay attention, can extend the welded ball valve service life.Regular ball valveAfter a period of time, the user must move the ball valve ball valve. The use of welding ball valve has a great role, but also can reduce the problem generated.1.Ball valve surface stains to clear, regular ball valve, you can reduce the accumulation of surface stains. Reduce the erosion caused by the surface of the ball valve, ball valve can be extended life.2.Regular ball valve, can be reduced because of external reasons, leading to a fixed ball valve can not be easily adjusted.Regularly clean the valve seatClean the valve seat is conducive to the user to control and operate the fluid, improve theIndustry News July 20, 2016