En kort introduktion og systemdesignbeskrivelse af den lineære glidende enhed:
◎Linear sliding units are also called linear rails, sliding rails, linear guides, linear sliding rails. They are used in linear reciprocating motion applications. They have a higher rated load than linear bearings, and can bear a certain torque at the same time, which can be used under high load conditions. Realize high-precision linear motion.
Den lineære glideenhed er opdelt i en lineær glidende enhed med kvadratisk kugle, en lineær glideenhed med to-akser med kernerulle og en lineær glidende enhed med enkelt-akse.
På fastlandet kaldes det en lineær glideenhed, og i Taiwan kaldes det generelt en lineær guide eller en lineær glidebane.
Funktionen af den lineære bevægelsesguide er at støtte og styre de bevægelige dele for at lave en frem- og tilbagegående lineær bevægelse i en given retning. Afhængigt af friktionens art kan lineære bevægelsesstyre opdeles i glidende friktionsstyre, rullende friktionsstyre, elastiske friktionsstyre og fluidfriktionsstyre.
◎Linear bearings are mainly used in automated machinery, such as machine tools imported from Germany, paper bowl machines, laser welding machines, etc., of course, linear bearings and linear shafts are used together. Linear sliding units are mainly used for accuracy requirements comparison On the high mechanical structure, the slider-makes the movement change from a curve to a straight line. The new guide rail system enables the machine tool to obtain rapid feed speeds. In the case of the same spindle speed, rapid feed is the characteristic of the linear sliding unit. The linear sliding unit is the same as the flat guide rail. It has two basic elements; one as a guide is a fixed element, and the other is a moving element. Since the linear sliding unit is a standard component, it is a machine tool manufacturer. The only thing to do is to process the plane of a mounting rail and adjust the parallelism of the rail. Of course, in order to ensure the accuracy of the machine tool, a small amount of scraping of the bed or column is essential. In most cases, the installation is relatively simple.
Styreskinnen som føring er hærdet stål, som placeres på montageplanet efter finslibning. Sammenlignet med flade styreskinner er tværsnitsgeometrien af lineære glideenheder mere kompleks end flade styreskinner. Årsagen til kompleksiteten er, at der skal bearbejdes riller på styreskinnerne for at lette bevægelsen af glideelementer. Formen og antallet af riller afhænger af værktøjsmaskinens krav. Fuldført funktion. For eksempel: Et styreskinnesystem, der bærer både lineær kraft og subversivt moment, sammenlignes med en styreskinne, der kun bærer lineær kraft. Designet er meget anderledes.
There is no intermediate medium between the moving element and the fixed element of the linear sliding unit, but a rolling steel ball. Because the rolling steel ball is suitable for high{{0}}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 sliding unit system is like a bearing ring. 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 sliding unit 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 sliding unit. 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.
Hvis arbejdstiden er for lang, begynder stålkuglen at slides, og forspændingen på stålkuglen begynder at svækkes, hvilket resulterer i et fald i bevægelsesnøjagtigheden af værktøjsmaskinens arbejdsdele. Hvis du vil bevare den oprindelige nøjagtighed, skal du udskifte skinnebeslaget eller endda udskifte skinnen. Hvis skinnesystemet har en forspændingseffekt. Systemets nøjagtighed er gået tabt, og den eneste måde er at udskifte de rullende elementer.
Udformningen af styreskinnesystemet tilstræber at have det største kontaktareal mellem det faste element og det bevægelige element. Dette forbedrer ikke kun systemets bæreevne, men systemet kan også modstå slagkraften, der genereres af intermitterende skæring eller gravitationsskæring, sprede kraften bredt og udvide bæreevnen. Kraftområdet. For at opnå dette er der forskellige rilleformer til styreskinnesystemet. Der er to repræsentative. Den ene kaldes Gedai-typen (spidsbuetype), formen er forlængelsen af en halvcirkel, og kontaktpunktet er spidsen; den anden Arten er bueformet-og kan også spille samme rolle. Uanset hvilken slags struktur, er der kun ét formål, og stræb efter at have mere rullende stålkugle radiuskontakt med styreskinnen (fast element). Den faktor, der bestemmer systemets ydeevneegenskaber, er: hvordan de rullende elementer kommer i kontakt med styreskinnen, som er nøglen til problemet.