Traditional layer sticks law and the off-the-road tyre that cover production of the tread on brief law close-grained sex difference, product is single, when producing bigger norms tire especially, labor strength is great. Abroad uses twister of off-the-road tyre tread to twine tread mostly, typical tread twister is intended the ALPHA-R tread twister of company of big Lima Lang Gongni. Of home inclined hand in tire tread twister to still cannot twine sidewall, and there still is difference on appearance, quality and manufacturing efficiency. The article is brief introductory chemical industry 100 plain the tread of BTXC-3 off-the-road tyre that automation limited company produces twines quality and appearance control. Cheng tread twines pull current to be squeezed by sizing material commonly piece, deferent, profiling, refrigeration and twine 5 working procedure to comprise. Of home inclined the circuit that makes tire tread twister and control system all compare likeness. Twining what quality controls tread to twine quality is one of very important parameter, if quality is lesser, semifinished product of the birth when vulcanization cannot be full of a mould possibly or appear poriferous hollow even phenomenon; If quality is too great, wasteful twine time and sizing material. Twister of tread of tire of BTXC-3 project mechanization can control tread quality error to be inside 2%~5% . Tread twines quality main by go up a machine and PLC control. Those who open twister of tread of BTXC-3 off-the-road tyre go up a Twister of engine control software, parameter of choice menu craft manages / craft parameter, play the recipe that if the graph is shown 2 times,gives chooses a dialog box, the choice already put the recipe that be in and be revised or build a recipe. Consideration tread twines craft to should be revised by technical staff with additions and deletions, to assure the safety of craft parameter, after choose or building craft parameter, can play a password to examine dialog box, input correct account and password by the user, just can set parameter next. The craft parameter that if the graph is shown 3 times,enters installs an interface. Tread can be installed to twine appearance in interface of craft parameter setting, twine appearance main by wrap paragraph of number, height and decision of number of plies (limit of lining left and right sides is nodded must be nodded to include by outer or so limit) , graph 3 in the 0 lines of ply are carcass external diameter, the outerest appearance curve and diameter of fetal semifinished product decide voluble bulk, when sizing material recipe is stable, can go out according to sizing material density beg a theory to twine quality. Click the blue part of the part on the dialog box, shoot a curvilinear node dialog box, input ply is worth and reach ply correction with the distance of midpoint, click the accretion below the dialog box next, revise and delete pushbutton to finish add, revise or delete node (click ability can be revised or already node is deleted already had node, be revised otherwise and delete pushbutton automatic incinerate invalidation) . Because the curve is with semmetry of tire central line, because this needs setting tire only at the same time curve can. Multilayer when twining, the process can generate below one similar curve automatically according to the curve of ground floor, be like the node that generates automatically not quite ideal, still can click this to nod modification numerical value. Use instruction input to operate photograph comparing only with ALPHA-R tread twister, setting of parameter of appearance of BTXC-3 tread twister is more simple, convenient and intuitionistic. Probably after figure is definite, when needing fine tuning, can adjust ply compensating parameter, twine ply actually to be the poor value that inputs ply compensating parameter. Work for some time in product line especially hind, wait for a reason as a result of climate change, mechanical wear, twine quality to may be compared with first set phase have bigger change, need to revise ply compensating parameter a little only right now, need not revise craft curve node afresh. Go up the client inputs a machine software basis twine the parameter such as semifinished product of curvilinear appearance, birth and sizing material density, can the quality that appraise cipher out twines sizing material. Density parameter can be revised when changing sizing material recipe, so that correct estimation twines quality. Twine appearance control to be measured accurately twining ply actually is the key that assures to twine appearance and quality, twister of tread of BTXC-3 off-the-road tyre uses air cylinder, slip lid ball bearing and measure orgnaization computation to twine ply, if the graph is shown 4 times,measure an orgnaization. When glue when winding a week, diameter of fetal semifinished product greatens, prop up the slide block that measures a head to back down, the imitate quantity change that measures orgnaization generation feedbacks to be calculated to the computer through high speed tally a ply change. When glue when quality is stable, twine quality and twine bulk to become direct ratio, assure to twine ply to be able to assure to twine quality. The requirement ply that PLC twines bosomy axial some a little bit quite in real time and measure thickness, when ply did not achieve a requirement, twister is slow fast move, the next moves to bind a point immediately when ply achieves a requirement. To assure to twine precision, the following needs to notice. (1) measure a pressure of adjustable air cylinder to measure an adjustable air cylinder when pressure is greater, the gyro wheel that measures a head is pressed into glue more, can make twine ply actually bigger than measured value, it is better to because this measures a head,jump over Yi Shen to shrink. If adjustable and easy, when ply has change a bit, can make measure a head to back down or extension forward, can give the computer ply change feedback instantly. Test result makes clear: Measure an adjustable atmospheric pressure to answer not prep above 4. 5Mpa, and Yue Xiaoyue is good. (2) measure head and the deflection that measure head center place to measure those who measure a head to slant buy direction and wind way contrary, because this measures head measured value to compare actual ply lag period of time, deflection amount is larger lag is bigger, lag of measured value of the ply when fluctuation slope is bigger, because deflection amount is too large,appear possibly even bring about measure a head by in front the glue that already twined hold off and cannot the edge winds bosomy axial campaign, channel is pressed to pull a turn to measure the situation of a slippery course even on voluble tread; But deflection is measured too the hour measures the effect not ideal also. Be like glue width is 60~80mm, criterion deflection quantity is 25~40mm, it is better to twine the effect right now. (3) glue the glue when keep to the side is twined keep to the side is to point to stick the effect to assure to tangle, the glue that twines from the back need to stick advanced face gum above, glue must go up in width direction at the same time tall at the same time low. If the graph is shown 6 times, glue inferior should be in every time at the same time of oriented roller the leftest. To assure glue keep to the side, the taper with oriented due and appropriate roller. (4) if twine car edge to twine axial,wind career of bosomy axial motion athletic rate is too slow, twine sheet the time of tire is long, manufacturing efficiency is inferior, and because exhaust roller is pressed in glue,the likelihood appears above too long, appear a lot of canaliculus, twine tread appearance rough slip and coherent; But if rate is too rapid, criterion squeezing ramming and exhaust result are bad. (5) glue ply, width, temperature and flash glue ply, width and flash are affected to twining quality and appearance very big also. If the graph is shown 6 times, glue too thick when bulk error is bigger, and exhaust result is bad; Glue ply hour is twined close, redundant glue little, twine quality consequently computation is more accurate also, exhaust effect is better also, but twine time to grow, twine efficiency to drop. Glue width is bigger, twine efficiency taller, but quality of more not easy control and appearance, because of this glue width is 60~80mm commonly. Glue temperature is too high a sizing material is too soft, can make exhaust roller is pressed into glue in-house, wrap semifinished product of the birth after ending at the same time systole is bigger, changeful form; Glue temperature is too low criterion cannot joint. Squeeze the gum that give when having flash, twine appearance the meeting is very coarse, affect the integral quality of fetal semifinished product. The measurement that controls twister of off-the-road tyre tread the winding rate of head and twister and lag quantity, determine winding rate according to experiment and mathematical model, real time is measured twine ply and computation gives ply of fetal semifinished product and quality, can control the total mass that twines tread, make tread appearance satisfies craft requirement. The glue when twining ply, width and temperature have certain effect to twining quality and appearance, at the same time glue flash also can affect the integral quality that wraps fetal semifinished product. CNC Milling
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