Article List
- Machining of these hazards is on your side?A wide range of machinery manufacturing industry, including transport, machine tools, agricultural machinery, textile machinery, power machinery and precision instruments and other machinery manufacturing, generally speaking, there are casting, forging, heat treatment, machining, assembly and painting and so on, the occupational disease hazard is very significant.Mechanical processing is the use of all kinds of machine tools for metal parts for car, planing, drilling, grinding, milling, cold;General mechanical processing production process of occupational disease hazards are relatively small, mainly used in metal cutting cutting oil emulsion and the influence on workers, due to the high speed machine tool rotation, emulsion splash around, easy pollution skin, can cause folliculitis, acne, and so on.In the coarse grinding and fine grinding process and can produce large amounts of dust.1, industrial dust: the main existence and casting industry, the green sand preparation, modelling, shaIndustry News September 06, 2016
- For the maintenance of full welded ball valve do you understand?Standard if all welded ball valve under the condition of the uninsured raises a gender maintenance, once the leak, often is the damage is very serious, which not only increased the difficulty of repair, and often have even lose the possibility of repair and value.Therefore, for organization and management of complete valve repair work, not only should have corresponding consciousness of the people concerned, more importantly, prevention and maintenance measures, namely the regular inspection on the valve (for example, standard relative to the outside world all welded ball valve sealing, the valve in the closed state of closure, etc.).Preventive maintenance standard full welded ball valve is the key in the first time that the valve has a leak occurs, immediately to repair of the valve, because even in tiny circulation medium sealing surface under the condition of the damaged, can also cause the sealing surface area in a short time badly damaged, so that cause the expensive maintenance cIndustry News September 01, 2016
- Welding has so many requirementsWelding process is not simple techniques, the welding process has many demands, summarizes some for everybody below small make up.(1) welding procedure qualification should be based on reliable steel welding performance and welds before completion of the works.Welding parameters used in the welding procedure qualification, in principle is according to the weldability of the steel welding test result to determine, especially after the heat input, preheat temperature and hot temperature.For weldability have been fully understood, there is a clear guidance of welding process parameters, and has long use in practice production in domestic and foreign mature steel grade, generally do not need to mount the construction enterprise to carry on the weldability test.For: domestic development and production of new steel grade, or imported from abroad without used types of steel, should be provided by the steel weldability test assessment data.Otherwise the construction enterprises should collectIndustry News September 01, 2016
- Forged titanium do you understand?Forging of titanium metal blank sheet (excluding) exerting force, make its produce plastic deformation, change the size, shape and improve performance, to manufacturing machinery parts, artifacts, tools or blank forming method.In addition, according to the slider movement way and slide block vertical and horizontal movement (used in slightness piece forging parts, lubrication, cooling and high-speed production forging) mode, compensating device can be used to increase the other direction of movement.This way is different, the forging force, process, material utilization ratio, yield, size tolerance and lubrication cooling way is different, these factors also affect the level of automation.According to the movement of blank, forging can be divided into free forging, upsetting and extrusion, die forging, closed die forging, closed upset.Closed die forging and closed upset because there is no flash, material utilization ratio is high.With a process or a few process can complete complex foIndustry News September 01, 2016
- The characteristics of exhaust directly buried all welded ball valveExhaust directly buried all welded ball valve main characteristics are as follows:1, end connection body end connection pipe (note: end connection size to a standard: ASTM, EN, KS/JIS, etc.)2, mirror polishing the entire stainless steel ball test3, bubble tight seal constitution and carbon reinforced PTFE (Teflon) the seats4, preloading cushion spring closely to ensure low leakage and reduce the valve operating torque5, according to the international standard against burst the valve stem6, two o-rings can ensure that the stem seal and replacement7, dry stem bearing with PTEF and metal coating automatic lubricating ability, don't need to add lubricant8, the valve stem and port connection pipeline extension can be designed according to customer requirements.Above is the exhaust vent directly buried all welded ball valve features, hope can help to you.Industry News August 31, 2016
- Resistance welding technology to save in the advantages and disadvantagesResistance welding has the following advantages:1) melt nuclear formed, always surrounded by a plastic ring, molten metal from the air, metallurgical process is simple.2) short heating time, heat concentration, so the heat affected zone is small, the deformation and stress are also small, usually don't have to arrange correction after welding and heat treatment process.3) don't need welding wire, welding rod, such as the filler metal, and oxygen, acetylene, argon welding materials, welding of low cost.4) simple operation, easy to realize mechanization and automation, improve the working conditions.5) high productivity, and no noise and harmful gas, in mass production, can make up to the assembly line with other manufacturing process.But flash butt welding with spark splash, need isolation.Resistance welding faults:1) there is a lack of reliable nondestructive testing method, welding quality only by destructive test of the specimen and artifacts to inspection process, and guaranteed byIndustry News August 31, 2016
- Forging of dangerous and harmful factorsIn forging production easy injury accident happened, according to its reason can be divided into three kinds:(1) mechanical damage.In the manufacturing process of forging, machinery and equipment, tools, or abnormal selection and use of workpiece, the illegal operation, etc., can lead to mechanical damage.Such as forging hammer hammer wounded;Fly forgings hurt;Auxiliary tool for flying wounded;Die, punch dozen fracture, damage to hurt;Raw material, forging, etc in the process of transportation cause of parts;Lever wounded, hammer rod fracture of the wounded, etc.(2) the fire explosion.Red blank, forging and splash scale once encounter flammable items, easy to cause fire and explosion accidents.(3) burning hot.Forging billet heating to 800 ~ 1 200 ℃, the operator once in contact with the red blank, forging and splash scale, etc., will surely get burnt.Heating furnace of occupational hazards and scorching artifacts radiation of heat energy, using a variety of fuel combustion flame furnacIndustry News August 31, 2016
- Parts processing and heat treatment have you seen?What kind of subsequent processing parts processing using deformation and heat treatment process control, manufacturing process of other protective antioxidants in how to solve this problem?Magnesium alloys can be divided into casting magnesium alloy, magnesium alloy machining and heat treatment deformation of magnesium alloy face a big problem, including aluminum alloy also has a lot of deformation, in order to eliminate deformation of my several methods.After aging treatment is the deformation and stress to the school, the school in the form of heat on the way to the school, when another kind of method is formed on the surface of the school form, I suggest that can try to use the shot peening processing methods, including shot peening processing formed in the shape of airplane wings.Peen forming - the advantage is: first of all introduces the compressive stress, material properties, especially the fatigue performance is good;The second thin-walled parts, especially magnesium alloy afIndustry News August 30, 2016
- Such precision forging you know?After forging, precision forging is refers to the parts only need a small amount of processing or processing is no longer meet the requirements of the parts dimension precision forming technology.Precision forging forming ways there are two main types: the elaboration blank, namely direct forging blank that could satisfy the requirement of precision machining.Precision forging, the whole parts or parts directly USES the precision forging process, thus reducing machine.Many currently used in production of precision forging process.According to the different forming temperature can be divided into hot forging, cold forging, warm forging, composite precision forging, etc.1, hot forging processHot forging is refers to the above the recrystallization temperature of precision forging technology of forging.Because of the high deformation temperature, in the forging deformation resistance of materials is low, good plasticity, so prone to forming complex geometry parts.2, cold precision forgingIndustry News August 30, 2016
- Stainless steel parts processing cutting tool would you use?Stainless steel parts processing on the tool surface roughness of cutting part for higher cutting part of the surface finish can reduce friction, the chip formation curl tool durability.Compared with the processing of ordinary carbon steel, stainless steel processing cutting dosage should be reduced to slow the tool wear;While selecting the appropriate cooling lubricants, in order to reduce the cutting heat and cutting force in the cutting process, extend the service life of cutting tools.Stainless steel processing when the demand for cutting tool geometric parameters, the general should be after former Angle, Angle of options to consider.When choosing anterior horn, want to consider volume crumbs slot type, presence of chamfering and blade Angle of dip Angle of the positive and negative factors such as the size.No matter what kind of cutting tools, processing must be used when stainless steel larger rake Angle.Shoulds not be too small to the Angle of choice, but also shoulds not be toIndustry News August 29, 2016