Spoke is one of compositive parts with the most important car, the security of travel, truckload to the car the beautiful degree of the exterior port with be had principal. As the ceaseless development of auto industry, people is higher and higher also to the requirement of car spoke, how to adopt advanced science and technology and treatment technology, will perfect the security of car spoke and dependability ceaselessly, prolong the service life of car wheel, already became one of issues that at present whole industry place pays close attention to most. The article elaborates the key what how use division arm scanner to finish wheel spoke ply to measure; to pass the use of this measurement technique, huge raises spoke ply detect efficiency and dependability, have main direct effect to the treatment of congener spare parts. Spoke, it is the part of rim of the join on the wheel and hub, it is the main unit that protects wheel annulus circle and spoke. To reduce the intensity that assures spoke at the same time again, spoke is used normally wait for intensity the design of different ply, undertake machining as preform with armor plate more. Its machine a method is press preform the method through coming back first, machine good into the design figure, wait for working procedure into travel punching and appearance rest and reorganization again next. How to assure the accuracy of spoke ply, decided huge the intensity of spoke and service life, good spoke can assure a car to stabilize degree and security mediumly in travel process not only, because wear away,can avoid more and create the possibility of car tire occurrence problem. Graph a variety of 1 spoke are in of traditional car component detect in the process, encounter ply when a kind problem, commonner method is to use dial indicator or the traditional measure such as callipers undertakes metrical, when this method is measuring the plane with a few better treatment, still can use constrainedly, but in encounter spoke range of this one type is sophisticated, when the part that has a large number of curved surface especially, this kind traditional method produces effect very hard. And, this method often can measure the thickness that chooses the place partly only, cannot reflect the integral condition of the spare parts in the round, because this already cannot satisfy modern treatment craft requirement. The ply that how should complete this kind of part effectively quickly so detects ask? The occurrence of articulatory arm scanner, just solved this one difficult problem. Articulatory arm is measured machine, it is a kind of new-style 3 coordinate are measured machine, have precision tall, bulk small, weight is light, facilitate carry wait for a characteristic. This device is extremely small to outside ambient requirement, can use normally in the environment of 0-50 ℃ , and applicable wait for a variety of environments at lab and workshop spot, can realize traditional pattern stationary all function of 3 coordinate, at present already by wide application at appliance of machine of car spare parts, project, aerospace, motion, shipping weighs each industries such as labour. Articulatory arm is measured machine can differ according to measuring the type of dimension, deploy thereby measure a head forcedly or laser scanning measures a head to undertake detecting. When measuring spoke thickness, because we hope to get comprehensive and complete data, the articulatory arm that because this deploys laser scanning,measures a head measures machine general is the first selection equipment when we are measured. The scanning process of the data that nod the cloud wants to make accurate assessment to the ply of spoke spare parts, we must get complete spoke to nod cloud data first. Considering spoke kind the treatment dimension of the spare parts and precision requirement, we can choose ROMER RA7525SI series to measure machine will undertake those who nod cloud data get. If have the appropriate tool that hold card, we can have product vertical stroke fixed spoke two side, if inconvenience holds card,finish the scanning; of full data thereby, we can use hot frit silica gel to secure 3 ball bearing in spoke surface, ball bearing need is fixed retroflexion in the spare parts the position that when two sides undertakes data scans, all can sweep, get spare parts positive and negative through two scanning so the complete data of two side. The joining together of the data that nod the cloud is in Geomagic Qualify software, the steel ball that attends two data nodding the cloud of scanning first has been defined as sphere, will among them definition of a data is reference fiducial, another data definition is test data, use be based on a feature fiducial to neat means, sphere one to one correspondence good, finish data joining together, close for data of a whole, delete the data of the ball bearing part that needs no longer at the same time. The processing of the data that nod the cloud and the build Geomagic Qualify software to be able to do scanning data ply that coordinate fastens are analysed, but the data nodding the cloud that need will scan first pattern of translate into range. We can do the data that nod the cloud noise dot to fall first processing of a confusion of voices, withhold brim data to do data to filter again next sampling, final repass encloses a command, the data that nod the cloud changeover is pattern of trigonometry reseau range, its data can be saved for STL format. The trigonometry reseau area that after cloud data was enclosed at 4 o'clock, the graph gets Nextpage founds planar feature in the data admiral underside after enclosing, found central aperture the feature that it is a circle at the same time, get a dot feature by need on underside plane at the same time, it is the centre of a circle that found and dot construction string characteristic. Establish coordinate department next, plane can found the plane that it is XY, found point-blank for X direction, definition of the centre of a circle is origin, criterion coordinate department is built. When ply analysis is doing ply of spoke curved surface to analyse, we can cross current coordinate to fasten a center, according to the span of every other 1mm, take appoint sectional the node with spare parts surface, seek the space between each node and its rear and corresponding vector dot again next, beg ply for place namely. For example, when the ply that we had asked current coordinate fastens interval of 1mm of XOZ planar every other to nod, in wanting a preexistence software, found [spot position volume] , revise [removed] and [origin] the position, the position of the place that wants us is founded come out. Because found sectional with the fluctuation of spare parts surface two side can have point of intersection, accordingly we need to change grille option right now, withhold only the node of Z direction can. Graph 1mm of 5 every other takes a test point to do ply analysis to choose in software [ply] analytic option, reelection choose [volume of to load seat] , can guide the analytic point of the interval of every other 1mm that a moment ago founded comes right now, according to diverse tolerancepublic errand demand, after installing the common difference that measures off color a collection of illustrative plates accordingly to take, the ply that OK and automatic to load chooses software accordingly, tag the seat that gives relevant point to come on data chart. If have analysis of many sectional need, can another one to load can. Graph the chooses ROMER brand articulatory arm that the analysis of 8 different positions orders scanner of ply joint arm is measured machine, have the many different price such as RA71/RA73/RA75 the machine model of different precision, its measure range from 1. 5m comes 4.
5m differs, OK when measure the size according to the spare parts, choose the equipment of appropriate norms. Laser scanning measures a head to also be had at the same time inside buy RS, and outside the many model such as buy CMS 108 can choose, among them SI series is measured machine is OK already and contented spoke kind the measurement of the spare parts, but if have at the same time other more the spare parts dimension of high accuracy gauges a demand, when perhaps needing the part that scanning Gao Liang is spent or pure black and so on scans harder, also can choose CMS 108 such high-end product. The scanning speed of head of RS series laser is 50000 a little bit / second, working space is 150mm, its depth of field is 100mm, have the material that differs according to scanning spare parts to pledge automatic exposure gets the function of exposure coefficient, can finish the scanning of qualitative part of of all kinds ability very well. The data of hardware of spoke of scanning of articulatory arm scanner that summarizes the article to use, software of repass Geomagic Qualify becomes the means that ply analyses, can go to the lavatory to undertake quickly what requiring the analysis of positional ply, data is comprehensive and reliable, very good settlement spoke ply is being measured on the difficult problem that encounters, assured the dependability of wheel spare parts and security thereby, be worth to popularize. CNC Milling