Kev siv cov ntawv qhia linear hauv tshuab cuab yeej
Txoj kev qhia kev tsheb ciav hlau ua rau lub tshuab cuab yeej kom tau txais kev noj ceev ceev. Nyob rau hauv cov ntaub ntawv ntawm tib lub spindle ceev, ceev ceev yog ib tug yam ntxwv ntawm linear guides. Cov kab ntawv qhia, zoo li cov lus qhia tiaj tus, muaj ob lub ntsiab lus tseem ceeb; ib qho yog ib qho kev qhia yog lub caij ruaj khov, thiab lwm qhov yog lub caij txav. Txij li cov ntawv qhia linear yog ib qho qauv, nws yog rau cov cuab yeej siv tshuab. Tib yam uas yuav tsum tau ua yog ua kom tiav lub dav hlau ntawm lub tsheb ciav hlau mounting thiab kho qhov sib luag ntawm txoj kev tsheb ciav hlau. Ntawm chav kawm, txhawm rau kom ntseeg tau qhov tseeb ntawm cov cuab yeej siv lub tshuab, ib qho me me ntawm scraping ntawm lub txaj lossis kem yog qhov tseem ceeb. Feem ntau, lub installation yog kuj yooj yim.
Compared with flat guide rails, the cross-sectional geometry of linear guide rails is more complicated than that of flat guide rails. The reason for the complexity is that grooves need to be machined on the guide rails to facilitate the movement of sliding elements. The shape and number of grooves depend on the machine tool to complete. Function. For example: a guide rail system that bears both linear force and subversive moment is compared with a guide rail that only bears linear force. The design is very different.
There is no intermediate medium between the moving element and the fixed element of the linear guide, but a rolling steel ball. Because the rolling steel ball is suitable for high-speed motion, has a small friction coefficient and high sensitivity, it can meet the working requirements of moving parts, such as the tool holder and carriage of the machine tool. The basic function of the fixed element (guide rail) of the linear guide system is like a bearing ring, and the bracket for mounting the steel ball is shaped like a "v". The bracket wraps the top and both sides of the rail. In order to support the working parts of the machine tool, a set of linear guide has at least four supports. Used to support large working parts, the number of brackets can be more than four.
When the working parts of the machine tool move, the steel balls circulate in the groove of the bracket, and the wear of the bracket is distributed to each steel ball, thereby prolonging the service life of the linear guide. In order to eliminate the gap between the bracket and the guide rail, the preload can improve the stability of the guide rail system and the preload can be obtained. It is to install an oversized steel ball between the guide rail and the bracket. The diameter tolerance of the steel ball is ±20 microns, with 0.5 micron increments. The steel balls are screened and classified and installed on the guide rails respectively. The size of the preload depends on the force acting on the steel balls. If the force acting on the steel ball is too large, the steel ball will withstand the preload for too long, which will increase the movement resistance of the bracket. There is a balance problem here; in order to improve the sensitivity of the system and reduce the movement resistance, the preload must be reduced accordingly, and in order to improve the movement accuracy and the retention of precision, it is required to have sufficient preload negative numbers, which are contradictory two. aspect.
If the working time is too long, the steel ball starts to wear out, and the preload on the steel ball starts to weaken, resulting in a decrease in the movement accuracy of the working parts of the machine tool. If you want to maintain the initial accuracy, you must replace the rail bracket, or even replace the rail. If the rail system has a preload effect. The accuracy of the system has been lost, and the only way is to replace the rolling elements.
Kev tsim qauv ntawm kev taw qhia kev tsheb ciav hlau sib zog ua kom muaj qhov chaw sib txuas loj tshaj plaws ntawm cov khoom ruaj khov thiab cov khoom txav. Qhov no tsis tsuas yog txhim kho lub peev xwm nqa ntawm lub cev, tab sis kuj tseem tuaj yeem tiv thaiv qhov cuam tshuam ntawm lub zog uas tsim los ntawm kev sib tshuam txiav los yog lub ntiajteb txawj nqus txiav, nthuav tawm lub zog dav, thiab nthuav dav lub peev xwm. Thaj tsam ntawm lub zog. Yuav kom ua tiav qhov no, muaj ntau qhov sib txawv ntawm qhov kev taw qhia kev tsheb ciav hlau, thiab muaj ob tus neeg sawv cev, ib qho yog hu ua Gedai hom (ko taw taw qhia hom), cov duab yog ib nrab - voj voog txuas ntxiv, thiab qhov chaw sib cuag yog lub apex; Lwm qhov yog Ib qho yog ib puag ncig arc, uas tuaj yeem ua si tib lub luag haujlwm. Tsis muaj teeb meem dab tsi ntawm cov qauv, tsuas yog ib lub hom phiaj, thiab siv zog kom muaj ntau dua dov steel pob vojvoog sib cuag nrog cov lus qhia rail (taw lub caij). Qhov tseem ceeb uas txiav txim siab qhov kev ua tau zoo ntawm qhov system yog: yuav ua li cas cov ntsiab lus dov hu rau cov kev taw qhia rail, uas yog tus yuam sij rau qhov teeb meem.
