Below 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 tempera

Casting mold heat treatment correctly or not directly related to the mold service life.Caused by heat treatment process and procedure is not correct, mold deformation, cracking and scrap, and heat treatment of the residual stresses leads to failure of mould in use about which accounts for half of the mould invalidation.Casting die cavity are made from high quality alloy steel, the material price is higher, plus the processing fee, the cost is high.If due to improper heat treatment or heat treatment quality is not high, lead to scrap or life can not meet the design requirements, the big economic loss.Therefore, when the heat treatment should be paid attention to the following:(1) substrate is strong, is to improve the strength and toughness of the matrix, reduce deformation and fracture, therefore its conventional heat treatment must be strictly according to the process.(2) the surface strengthening processing, its main purpose is to improve the mold surface lubrication and wear resista

Machinery manufacturing is to provide technology and equipment for various industrial production industry, the development of manufacturing industry to promote the development of industry and promote the construction and development of national economy.Machinery manufacturing is based on the development and utilization of natural resources on a large scale development, the development model greatly damage the ecological environment, influenced the sustainable development of industry, the concept of green manufacturing.The feasibility of a green, mechanical manufacturing process1 high and new technology to provide technical support for the green machinery manufacturingThe advanced mechanical manufacturing molding technology.In the concept of green production, machinery manufacturing technology has a new development, such as precision casting, such as direct deposit and cold extrusion molding technology has been widely used.Precision molding will be the future development direction of ma

Now 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.Addition

In laser welding process of stainless steel, do you usually need to heat treatment after welding, especially the martensite and ferrite stainless steel, select the correct preheating before welding and welding post-processing is a necessary condition to ensure the quality of laser welding machine for welding.So what stainless steel heat treatment after welding process?Heat treatment after welding of stainless steel tensile strength, creep limit and the influence of heat treatment temperature and holding time.The influence of heat treatment after welding of stainless steel impact toughness on different steel grade are different, generally stainless steel heat treatment process to choose a single high temperature tempering after welding or high temperature normalizing and tempering process:1, high temperature normalizing and temperingFor welding joint by normalizing plus high temperature tempering heat treatment.This is because the welding seam and heat affected zone, coarse grains, the

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 d

Casting mould processing and the application of complex, processing mould parts including the content of the structures (such as machining parts surface, parts, etc.), machining allowance, the machining accuracy and surface roughness, etc.Injection mould processing required method is as follows:(1) flat and processing: namely the shape as the plane, the corresponding processing jobs have saw, planer, plug surface help, electrolytic grinding, milling, etc.(2) the hole processing: processing hole for the shape (form), the corresponding processing type of work have a drilling, reaming, reaming, bump, tapping, grinding, grinding, edm, wire cutting, etc.(3) axial processing: processing for axial shape (shape), the corresponding processing type of work have a car, cylindrical grinding, wire cutting, etc.(4) type surface, surface, three-dimensional processing: the processing of the shape for the type of surface, surface and three-dimensional space.Corresponding processing work kind of milling

Die casting technology of production process there is some need to pay special attention to, the following is to summarize.(1) gravity casting mould preparation process files mould technology mainly includes the mould parts processing technical process, key points of mold assembly process or next art discipline, material list, the list of purchased parts and outsourcing parts list, etc.Gravity casting mould technology personnel should be fully understand the die structure, working principle and requirements under the premise of.(2) the second tool design and process of preparation of 2 kinds of tools (level 2) refers to the processing and mold parts and mold assembly used in a variety of special tools.These special 2 kinds of tools, usually by the mold design process technician is responsible for the design and process (special part completed by specialized technical personnel).Second class (with the quality and efficiency of quality of mould and production progress plays an important

Traditional ordinary die forging and machining method has been difficult to meet today's cars, motorcycles and other industrial production of high quality, high precision, high efficiency, low consumption and low cost requirements.Powder forging process is powder metallurgy process and organic combination of precision forging and developed a market competitiveness for a less, no cutting metal processing method.Powder forging metal powder as raw material, through preform pressing, heating it in a protective atmosphere, the blade forgings as forging blank in press and implementation without flash precision die forging, get the same as the ordinary die forging density and complicated shape precision forgings.Powder forging process requirements:1, ingredients and mixing.According to the different products of powder material and performance requirements, select the appropriate low alloy steel powder, after batching calculation and accurately according to powder weight, placed inside the mix

Mechanical 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 people