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, sha

Tests for the machine tool castings, usually by the two parties agree beforehand good reference to the technical requirements on the drawings provided by purchasing or technology contract.These requirements are general in national, ministerial standard or industry standard as the basis, of course, also have the two sides in the contract order to determine the technical requirements.Machine tool castings quality testing, generally include inspection of size, shape and appearance of the surface quality of the visual inspection, and chemical composition analysis and mechanical property test, here is the nondestructive testing methods.The specific method is as follows:1, magnetic powder inspection: all machine tool castings surface and internal to accept magnetic powder inspection.2, liquid penetrant inspection check: all machine tool castings surface and internal check accept liquid penetrant inspection.3, machine tool castings to be 100% full X-ray film.4, if the rules and regulations of

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 c

Strong magnetic magnetic separator is mainly used to remove miscellaneous stone, improve quality, achieve sales.Weak magnetic equipment lean manganese ore, lean hematite, limonite, non-ferrous metal ore or slag separation, purification, concentrated in the ore and miscellaneous stone separation, thus improve the metal grade of concentrate.Influence of strong magnetic magnetic separator magnetic effect factors include:1. Mine magnetic separation equipment is reasonable: capture when the magnetic field of magnetic material is timely and check-out time capture ability to clean, does not affect the magnetic field.2. State of movement in the process of material in magnetic separation, is advantageous to the magnetic capture: for example, when a slowly into the magnet magnetic materials could be sucked, but you thrown as far as the magnet is likely to be the opposite result.3. The speed of the feed particle size, particle size, strictly speaking, only the design intensity distribution is rel

Welding 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 collect

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 fo

Double metal wear-resisting hammer crusher in the industry today is the preferred crusher accessories, it has low cost, good abrasion resistance, every tons price is only 15000 yuan or so commonly, but its wearability is equivalent to three times the service life of high manganese steel, so most of the match high manganese steel hammer crusher manufacturers want to, let the customer feel not wear-resisting, then sell high chrome bimetal hammer, is not in the production of hammer crusher manufacturer, and our company is specialized in the production of this kind of high wear-resisting hammer head, but some customers say the hammer head are not wear-resisting, this is so with production process, the following detailed descriptions for you double metal wear-resisting hammer head casting production process.Bimetal hammer head, from the name is two kinds of hammer, hammer head is worn parts is high chrome material, this material has high hardness, the hammer handle is low chromium carbon st

Exhaust 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.

Different stainless steel processing and surface processing craft, can make the material of the same highlights different visual effect and feel features.From the perspective of design, need to know the following 3 kinds of surface treatment technology of stainless steel.01 - sand blasting, shot peening treatmentSandblasting is using compressed air as the power, to form a high speed injection beam will (copper ore, quartz sand, emery, iron sand, sea sand) high-speed jet to need to deal with the surface, make the workpiece surface appearance or shape change.Sand on the surface of engineering and technology has the very strong application, such as: improve the adhesive viscosity, decontamination, matte surface after the optimization of machining burrs, surface processing.Is uniform and efficient than manual grinding sand blasting process and the method of the stainless steel handle, make a low-key, durable characteristics of the product.Here are a few examples intuitive to see the effect

Resistance 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 by