Cast the new technology application on lorry of high speed burden

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  • source:MCGUFFIE CNC Machining
One, the overview is current, in world economy stagnant circumstance falls, our country economy gets rapid development, the flying development that carries equipment for the representing's railroad with motor-car is more heart-stirring. Lorry obtained great progress likewise on the development direction of high speed, burden, investigate its reason used advanced new technology in great quantities namely, this uses practice proof again: Science and technology is the first productivity. In van burden respect, at present our country has been on world advanced cavalcade. Since 2006, build standard of carring capacity of current freight car newly to already raised 70t from 60t, carry coal is special 80t of truck carring capacity, develop the steely ore that developed carring capacity 100t special van; Carry to having van to undertake 120km/h fast transform, finished our country lorry upgrade replacement. Gross ril load of lorry of past our country is long-term under 21t, begin from 2006, gross ril load of current freight car raises 23t, burden van gross ril load raises 25t. Current, the development project of van of 30t gross ril load already began to start. As the addition of gross ril load, carring capacity and speed, the key that goes up to the important part such as van bogie and hook delay if shake pillow, bogie side frame, coupling raised taller requirement, want to make sure carring capacity and speed ask already, want to assure use security again. Go up in the design of cast on one hand, introduce new model, if shake pillow, bogie side frame by turn K2, K4 to turn K5, K6, coupling arrives by 13 16, 17, raised dimension and wall thick, use tall brand data: Arrive by general carbon steel B class steel, arrive again B+ class steel, C class steel, E class steel, new material is low-alloy steel, the strength that can increase cast and fatigue resistance can; Use ceaselessly on the other hand cast a technology newly, improved the quality of cast, the high speed that is van, burden provides safeguard. In recent years, these cast a technology newly to involve model, make next core, core, fine, fall arenaceous, heat treatment, aggrandizement casts bolus and cast to detect wait for a respect. 2, new technology applies 1.

Lorry of modelling technology our country shakes the cast steel such as pillow, bogie side frame, coupling introduced current model arenaceous cast arenaceous modelling, gas to develop cirrhosis of modelling, ester the product line with the mechanization higher rate such as arenaceous modelling of water glass of sclerotic law of water glass arenaceous modelling, CO2, furan colophony arenaceous modelling and V law modelling, shake modelling machine photograph to manufacture efficiency than rising with what use extensively before, modelling quality also rises substantially. Cast-iron an inclined wedge is extensive used the modelling method with iron arenaceous Fu. As a result of modelling quality rise, the dimension precision of cast rises apparently, come for years the traditional blemish that cast forms the most easily -- sand holes decreases in great quantities, cast quality rises apparently. 2.

The technology that make core shakes pillow, bogie side frame makes core basically use ester sclerosis colophony of arenaceous craft of colophony of phenolic aldehyde of arenaceous craft of sclerotic water glass of water glass arenaceous craft, CO2, 3 ethylamine craft, Pep-set, furan from good arenaceous technology, polypropylene arenaceous craft of acerbity natrium colophony. Shake pillow, bogie side frame and coupling use technology of whole system core, main method has: Whole of box of craft of technology of core of whole system of jolt ramming extruding, figuration of key cylinder of the extruding inside the box, cold core shoots core technology, shell core to shoot craft of agglutinate of core of whole of core technology, fluctuation, and coupling whole shoots core technology to wait. Current, shake to finish core of whole of pillow, bogie side frame shoots core, our country has developed the greatest weight to be the machine ejaculation core of 250kg, use in order. Lorry key large part shakes the development of technology of core of whole of pillow, bogie side frame, product of indicative Chinese lorry cast steel makes core technology already reached world banner level. Integral core new technology makes cast lumen arenaceous core is comprised 12 pieces by 6 ～ turn into a whole, use what integral core forms to shake pillow, bogie side frame and coupling cast lumen, the chance to extricateoneself from an awkward position that can eliminate conventional technology to bring, flash cast blemish, rise shake the lumen quality of pillow, bogie side frame and coupling. 3.

Working procedure of the core below technology of the core below intelligence is to assure to shake the important process of quality of product of pillow, bogie side frame. Long-term since, the support in shaking pillow, bogie side frame makes a process issues core artificially, not only the manufacturing demand that has hoisting to have stability cannot satisfy high quality product, and depend on to the factitious element such as the craft of handlers degree tall, process quality wave motion is consequently bigger. Will original issue core to transform artificially issue core for intelligence of integral core manipulator, be helpful for comprehensive promotion shaking pillow, bogie side frame makes technical standard, raise manufacturing process to control level and product quality, it is right those who shake pillow, bogie side frame issues core technology is important improve. Intelligent manipulator (industrial robot) noumenon uses 6 axes to rotate articulatory type design, fixed position of three-dimensional laser scanning can measure the robot accurately fixed position arenaceous core and sandbox are in the translation of direction of X, Y, Z, tilt, rotate angle, next core are integrated precision ≤ ± 0.

45mm, the system repeats ± of fixed position precision 0.

15mm. Technological process: Robot issueing core awaits arenaceous core and sandbox to reach worker worker the sandbox → robot that → vision system reachs sandbox to undertake the robot informs a system output falls good core locating arenaceous core of → robot capture puts the → inside sandbox to arenaceous core returns original position, cycle issueing core ends. 4.

Fine technology rises as what quality to cast material mechanical performance asks, original general carbon steel is replaced by low-alloy steel, if lorry shakes material of pillow, bogie side frame pledges by ZG230 - 450 raise B class steel and B+ class steel in succession, coupling material raises C class steel and E class steel by general carbon steel character. Rise as a result of what material asks character, taller to fusion equipment requirement, cast steel fusion uses electric arc heat, cast-iron use electric stove, make cast steel, cast-iron fusion quality rises greatly. The use that new technology is like technology of technology of the fine inside L-F furnace, the fine outside steel fluid furnace improved steel fluid quality further, can make steel is planted the content of S (quality mark) reach pair of levels of 0. A fine of fluid of the steel that blow argon is being fed outside furnace is craft of fine of fluid of the steel outside a kind of furnace, after tapping, to contain breathe freely steel fluid of the brick feeds aluminum steel in the bag or line of Si-Ca-Ba Bao Xin undertakes deoxidization, the brick breathes freely to purify steel fluid to gas of argon of the inbreathe in steel fluid through pottery and porcelain in the meantime, because breathe freely,bricky outfit includes floor in steel, the gas that blow argon makes steel fluid churns, form small and dispersive argon bleb. Argon bleb rise causes steel fluid churn, the petty be mingled with that can make disperse in steel fluid gets collision, assemble forms low melting point big grain be mingled with is adsorptive the exterior eduction at bleb, raised the rise rate of be mingled with thereby, achieve depurative goal. Craft of the fine outside steel fluid furnace can reduce the aeriform content in steel and field trash effectively, improve the configuration of field trash, raised cast immanent quality. This technology applies extensively already in coupling to reach shake the cast steel such as pillow, bogie side frame in production. 5.

Fall arenaceous 50 time begin 20 centuries, CO2 sclerotic water glass is arenaceous as a result of craft handy, price is low with pollution degree is small, be used extensively by manufacturing industry of cast steel of our country lorry. To 60 time metaphase, water explodes, use of water bath craft in succession, solved the difficult problem of arenaceous difficulty of water glass arenaceous Qing Dynasty, CO2 sclerotic water glass is arenaceous received wider application. But cast steel mix in casting condition stimulate cold condition to fall to produce limitation of Mao Xi crackle easily, water pollution issue is increasingly outstanding also at the same time. Rise as what ask to burden of railroad high speed, 90 time evening, lorry is important cast steel begin to use dry method to fall arenaceous craft, use generally already at present. Dry method falls arenaceous use, showing the generation that reduced crackle, for lorry moving safety reduced hidden danger. 6.

Cast steel of heat treatment van shakes pillow, bogie side frame is steel of B ＋ class, use technology of normalizing heat treatment, coupling is E class steel, use technology of tone simple heat treatment. To raise the consistency of quality of cast heat treatment, coupling already was used continuous heat treatment craft, shake pillow, bogie side frame already also was popularized use continuous heat treatment craft. 7.

Processing of the aggrandizement that throw ball shakes pillow, bogie side frame uses the puissant processing that throw ball, improved the exterior quality of cast, form in the surface of cast at the same time press stress, in order to increase the exterior strength of cast, the fatigue resistance that increases cast then can. 8.

Cast detects the safety for burden of safeguard lorry high speed, detect to cast the technology raised taller requirement. Offer pair of cast products on one hand detect, like the iron award that implemented on July 1, 2005 TB/T3105 - 2005 " railroad van cast steel shakes flaw detection of magnetic particle of pillow, bogie side frame " , carry assembled freight car 2007 [2007]310 date file asks " railroad van cast steel shakes ray of pillow, bogie side frame takes a picture examine technical condition " , " railroad van cast steel shakes condition of technology of flaw detection of ultrasonic of pillow, bogie side frame " , " railroad van cast steel shakes magnetic particle flaw detection sets fluorescence of pillow, bogie side frame " . Detect newly the technology if flaw detection of magnetic particle flaw detection, fluorescent magnetic particle, ray flaw detection, ultrasonic flaw detection and ultrasonic are measured thick be used in succession at lorry cast. In addition, the form that still raised pair of cast nearly two years tolerancepublic errand undertakes 3 coordinate detect, applied DR to cast substance - real time is become resemble detecting with CT technology. On the other hand, used generally in cast production process fast, advanced detect technology, if read spectrometer, furnace continuously before fast analyzer, mensurable metallographic analyzer. New cast detects technical use, provided safeguard to acquire reliable cast quality. 9.

Cast technical management to cast production working procedure is much, the factor that affects quality is more complex, control of manufacturing process quality is attached most importance to especially should. For this, lorry shakes manufacturing plant carried out pillow, bogie side frame to be in charge of a branch to allot by the railway ministry " shake pillow, bogie side frame casts manufacturing technology to run a point " . Its are main content includes: The government that appearance of the management of the management of the execution of the management of file of mold design and evaluation, craft test and verify, craft, craft and examination, raw material, tool and equipment, metric instrument and detector have, employee grooms, the control of process of the control of molding process, fusion, pouring, and 22 quality record, ask cast uses one calorie is made, namely every shake pillow, bogie side frame fills in a piece of quality assures card. 3, the application that epilogue casts new technology, it is the fundamental strength that drives lorry high speed, burden, these new technologies already formed the industry standard that produces for lorry cast at present. As the flying development of national economy, rise ceaselessly to the requirement of lorry cast, will have updated casting the technology is applied extensively. CNC Milling