Exceed large wainscot kind spare parts treatment is out of shape control technology

15mm, muscle high public errand is ± 0.

2mm, the surface outside wainscot sticks platform, warp is not more than 5mm, not agitate of be patient of. the treatment of structural member of large to exceeding whole, want to satisfy above precision to ask, must want to scientific and reasonable treatment is out of shape control technology, in order to satisfy the requirement of treatment. The article is large to exceeding wainscot kind spare parts treatment is out of shape control technology undertakes study, used whole to be out of shape control technology, the test and verify in be being machined actually this kind of whole is out of shape control technology, can control well exceed large wainscot kind of the spare parts be out of shape, overall treatment precision was achieved 0.

2mm, obtained very good result, have main project to popularize applied value. Integral treatment is out of shape 1 whole processes control technique be out of shape control technological process is opposite exceed large wainscot kind the integral craft of the spare parts undertakes an analysis, what its semifinished product adopts full measure is large beforehand plank of drawing aluminium alloy, form finally " structure of one side smooth face, one side " asymmetrical integral wainscot kind spare parts, usually, material purify rate is achieved 95% the left and right sides. Beforehand the treatment that plank of drawing aluminium alloy forms in machining a process is out of shape basically is caused, especially dimension exceeds large structural member, in the treatment process that leads in big purify, if cannot handle the issue that leftover stress releases well, after treatment is being reached in causing a spare parts easily to machine a process be out of shape greatly, bring about dimension out of tolerance to the product does not satisfy a requirement and perhaps discard as useless thereby. If the graph is shown 1 times, union exceeds large wainscot kind the treatment flow of the spare parts installed the treatment that be as follows to be out of shape control whole technological process. Technological process includes: Large surplus opens finish machining of face of groovy antrum, fixed position, rough machining, natural effectiveness for a given period of time, vacuum to install clip, online measure surplus and finish machining to wait. Among them the main effect that large surplus opens groovy antrum is to release stress of semifinished product remains, this working procedure does not form diagnostic dimension, basically be the leftover stress that through fast purify large surplus data releases semifinished product itself, it is working procedure of control metabolic key; Finish machining of fixed position face, rough machining and natural effectiveness for a given period of time are to release stress of rough machining remains, release leftover stress further, the treatment of this one working procedure already was formed all the part semifinished product of cloth surplus, the action of effectiveness for a given period of time of together with nature, treatment of more easy control is out of shape. Vacuum outfit is placed and online the craft preparation that measuring surplus is finish machining working procedure, vacuum outfit clip is a kind of outfit that makes sure the spare parts is stable places means, through online measure the surplus change situation after winning course rough machining and natural effectiveness for a given period of time, adjust treatment craft thereby, in order to assure the precision of diagnostic dimension, prepare the treatment that after finishing, undertakes finish machining working procedure will finish wainscot. Above flow is carried out exceed large wainscot kind each working procedure that the spare parts machines, each working procedure considered to release stress and all cloth stress is out of shape with controlling the treatment of the spare parts, no matter fashioning the rough machining working procedure of diagnostic dimension or the finish machining process that controlling dimension precision, have the serious content that is out of shape control regards a spare parts as treatment analyse and considering, achieve whole to dominate treatment metabolic result thereby, controlling treatment to be out of shape is the chief factor that makes sure the spare parts machines precision. 2 release stress of semifinished product remains to exceed large wainscot kind the semifinished product of the spare parts is used large beforehand plank of drawing aluminium alloy, weight of semifinished product whole can achieve 5~6t, in deposit in reaching carriage process, wait for the influence of the element as a result of change of oscillatory, temperature, semifinished product itself arises easily very big be out of shape, to holding clip fixed position brings very big impact. Like 1500mm of × of a 19000mm the semifinished product course of × 75mm is deposited, after carrying, deflection is the biggest achieve 8mm, appear " since arch " condition, make the spare parts cannot install clip to go up to platform. Accordingly, to semifinished product it is important to be out of shape undertaking handling is special and necessary. If the graph is shown 2 times, use large surplus purify the kind that more than makings has groove to semifinished product comes to those who remove semifinished product be out of shape, according to the structural feature of the spare parts, below the premise that assures mental allowance, the part of more than makings of purify semifinished product achieves semifinished product gross 40% the left and right sides. Large surplus purify after more than makings, the leftover stress of semifinished product gets be releasinged very well, the spare parts is out of shape decrease, control is controlled in 1mm, and semifinished product weight is reduced greatly, reduced a spare parts to turn over the difficulty that the operation such as the face brings. Large surplus purify more than makings does not have special requirement to machine tool and cutting tool, and treatment efficiency is taller, solved problem of semifinished product metabolic not only, and the integral efficiency that improved spare parts treatment. Rough machining of Nextpage3 rough machining falls in the requirement that retains 3mm of finish machining surplus, form the basic outline of the spare parts, the basic structure of the spare parts has been formed. After classics rough machining, have 48h natural effectiveness for a given period of time to the spare parts, release stress adequately. Rough machining basically is to eliminate what the stress that feature of spare parts structure brings is released and cause to be out of shape, after the surplus after rough machining should satisfy the requirement of finish machining and assuring surplus of finish machining purify, won't cause be out of shape greatly, according to structural characteristic different, it is setting of rough machining surplus 3~5mm commonly. The course is thick after opening semifinished product and rough machining, 90% above got the leftover stress of part semifinished product release and all cloth, formed with spare parts theory dimension is a foundation, all of cloth 3~5mm surplus " modular base " , below this kind of circumstance, ability satisfies the requirement of finish machining, the ability below the environment that measures finish machining in Xiaoyu assures the treatment precision of the spare parts. After 4 finish machining prepare rough machining to end, have natural effectiveness for a given period of time to the spare parts, undertake vacuum holds clip next. As a result of the fiber direction of semifinished product of edge of direction of spare parts length, go out in semifinished product in more than makings and rough machining process, cutting direction basically also is edge fiber direction, be in so deflection of direction of spare parts length is largish, to satisfy precision the requirement needs to advance to be judged all right in finish machining adjust finish machining craft. If the graph is shown 3 times, application is online measure a technology to be versed in in the machine tool on to the spare parts two end undertake online detect, measure rough machining effect, prepare for finish machining [1] . According to actual part stretchy or the deflection that shorten, sentence final part beforehand be out of shape circumstance, adjust the deflection volume that processes two end accordingly again, in order to obtain final to the spare parts part stretchy or shorten the control of the quantity. This kind is carried in machining a process actually the will biggest stretchy or shorten be out of shape 0.

5mm is controlled 0.

2mm less than, achieved better result. Craft of 5 finish machining will form the final measure of the spare parts through finish machining, because process of this finish machining is very important. Because spare parts size is enormous, and the structure is opposite more complex, want to have scientific setting to craft in finish machining process so. If the graph is shown 4 times, part the equivalent analysis that local to some structure undertakes machining a process, one-way treatment causes spare parts stress easily " push indigestion " and cause be out of shape accumulation. Undertake adjustment arranging to the order of treatment, the means that uses treatment of move back and forth can well leveling stress and decrease be out of shape, its effect is very apparent. When making finish machining technology accordingly, use " local move back and forth, overall without foreword " treatment means, it is spare parts cent a few area, the means that move back and forth machines is used inside area, what semmetry uses between area is ordinal, reduce a hardware thereby be out of shape. Additional, exceed large wainscot kind part long way is compared very big, in machining a process cause turn of spare parts side easily, cause vacuum leak, the spare parts rebounds, cause a spare parts to machine out of tolerance thereby. The side turn that controls a part so also is very important, to assure the stability of treatment, the means that uses part of fixed position of many spacing bolt in machining a process will prevent side turn. Treatment is out of shape control effect above combines what the project carries out large to exceeding wainscot to be out of shape the problem undertook an analysis, put forward a treatment to be out of shape whole controls technique. Exceed large wainscot kind the train of thought that spare parts treatment is out of shape whole controls technique is be out of shape control is perforative go in whole treatment craft, machine control to the spot from craft process designing, whole process ground has specific aim ground to adjust technique, through application online measure wait for a technology to detect treatment result, analyse the deflection of treatment and feedback at machining craft, form system of treatment closed circuit thereby. Whole process treatment is out of shape pilot train of thought applies to dimension cycle of complex, treatment grows big, structure, the treatment of the structural member with high cost, to this kind of spare parts, treatment is out of shape control decided to machine a result directly. To big airlines development, exceed large wainscot kind the treatment precision of the spare parts has very important sense, it is very important that so control treatment is out of shape. Technique of metabolic of treatment of this kind of control also has important sense. Practice production makes clear, spare parts length achieves what 19m controls to exceed large wainscot kind treatment of whole of spare parts application is out of shape pilot craft, be out of shape the problem got very good settlement, precision of treatment of spare parts whole is achieved 0.

2mm left and right sides, achieved the demand that big airlines develops, this kind of treatment is out of shape control method also has very good promotion application value. The article studied the last word to exceed large wainscot kind metabolic of spare parts treatment controls a technology, from whole treatment of consideration spare parts is out of shape control, from semifinished product processing, rough machining adopts logical step to control a spare parts to be out of shape to finish machining, assure the treatment precision of the spare parts. Exceed large wainscot kind spare parts treatment is out of shape control technology considered spare parts treatment to be out of shape in the round pilot each working procedure, metabolic of this kind of treatment controls a method to have very good promotion application value, in treatment of other and large structural member method of this kind of control can assure the treatment precision of the spare parts and function. The research of this technology applies the development of big to our country airlines to have important sense. CNC Milling CNC Machining