Pob screws yog cov feem ntau siv kis tau tus mob Cheebtsam nyob rau hauv lub tshuab cuab yeej thiab precision machinery. Nws lub luag haujlwm tseem ceeb yog hloov cov lus tsa suab mus rau hauv cov lus tsa suab, lossis hloov lub zog rau hauv axial rov ua dua quab yuam. Nyob rau tib lub sij hawm, nws kuj muaj cov yam ntxwv ntawm high precision, reversibility thiab high efficiency.
Eccentricity: Hais txog qhov sib txawv ntawm qhov chaw nruab nrab ntawm sab ruaj thiab sab txhawb nqa.
Inclination: In addition to eccentricity, the installation error caused by the parallel error (up, down, left, and right) or vertical error of the screw nut mounting part between the screw shaft and the guide (LM guide, etc.).
Installation accuracy reference: Refer to the table for the reference value of the installation accuracy of the ball screw. The data in the table is for reference only. Please minimize installation errors. The installation accuracy of the motor support and coupling affects the walking and positioning accuracy of the workbench, so attention should be paid to the ball screw.
Unpacking: Be careful not to hit the nut and end thread. When disassembling the nut, you can manually rotate the nut from one end of the effective thread to the other end. Check whether the resistance is consistent and whether there is obvious bending. Be careful not to disengage the nut screw from the effective thread. Wipe off the surface anti-rust oil and apply lubricating oil.
Maintenance: When the linear speed is less than or equal to 30m/min, grease can be used for lubrication. According to the working conditions, grease should be injected every 300 to 600 working hours. It is recommended that oil lubrication be 30-60m / min, thiab yuam cov roj pos huab tuaj yeem suav tias yog 60-100m / min. Nws raug nquahu kom xaj lub hau ntswj hollow thiab txais yuav yuam kom txias thiab lubrication. Khaws qhov chaw ua haujlwm kom huv si thiab tsis txhob cia cov plua plav thiab lwm yam impurities nkag mus rau hauv txoj kev sib tw lossis cov txiv ntoo. Yog tias qhov xwm txheej tsis zoo, xav txog kev ntxiv cov npog tiv thaiv rau cov ntsia hlau.
Ball screws are usually used where precise positioning is required. The ball screw has high mechanical efficiency, low transmission torque and almost zero axial clearance, making it an important device in tool positioning and aileron drive applications. However, the resistance and heat generated by continuous operation may cause large friction and positioning errors. Increasing the design coefficient of the ball screw friction will also increase the torque, which in turn affects the positioning accuracy. When the ball is pressed between the ball screw nut and the screw shaft, the wedge effect is a potential source of friction. When rotating in the forward direction, the ball is usually pressed on the nut; on the contrary, the ball is squeezed on the screw shaft. Since the sliding friction coefficient is much larger than the rolling friction coefficient ({{0}}.1-0.3 when there is no movement, 0.001-0.003 when rolling), the wedge effect greatly increases the torque.
Ball screw drive has the following advantages:
①High kis efficiency. Kev sib kis tau zoo ntawm pob ntsia hlau kis tau tus mob feem ntau yog 20.92-10 feem pua , thiab kev sib kis tau zoo ntawm cov zawv zawg zoo tib yam kis tau tus mob yog 20.20-0.40.
②High kis tau tus mob, ruaj khov txav thiab tsis muaj qhov tshwm sim nkag. Lub pob ntsia hlau tsav yog qhov pib dov kev sib txhuam, nrog kev sib txhuam me me, thiab kev sib txhuam tsis zoo yuav luag tsis muaj dab tsi cuam tshuam nrog kev txav ceev.
③Khiav nyob rau hauv rov qab iav yam tsis muaj idling. Tom qab lub pob ntsia hlau thiab cov txiv ntseej tau ua ntej- nruj, qhov axial clearance tuaj yeem raug tshem tawm. Nyob rau hauv txoj kev no, tsis muaj qhov chaw tuag nyob rau hauv qhov kev taw qhia, thiab qhov tseeb thiab rigidity ntawm axial kis tau tus mob tau zoo tuaj.
④Nws yog thim rov qab. Vim tias qhov kev sib txhuam poob ntawm lub pob ntsia hlau me me, nws tuaj yeem hloov los ntawm cov lus tsa suab mus rau ib qho kev tawm suab, thiab nws kuj tuaj yeem hloov los ntawm ib qho kev tawm suab mus rau ib qho lus teb. Ob lub taub hau ntsia hlau thiab cov txiv ntoo tuaj yeem siv los ua tus tsav lossis cov neeg taug qab.
⑤Lub neej ua haujlwm ntev. Vim qhov kev sib txhuam me me ntawm kev sib txhuam ntawm dov, qhov kev pab cuam lub neej ntev.
As a precise and labor-saving transmission mechanism, the ball screw is widely used in precision machine tools and CNC machine tools due to the above advantages.
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