Installation and commissioning of CNC machine tool parts
Release time：2017-07-18
1, the spindle bearing installation and commissioning considerations
In the case of
(1) installation and commissioning of a single bearing: the assembly as far as possible so that the spindle positioning hole and the spindle shaft diameter and the bearing inner ring and the eccentricity of the raceway close to the opposite direction, so that the assembly after the eccentric The amount is reduced.
In the case of
(2) the installation and commissioning of two bearings: two support the spindle bearing installation, should be before and after the two bearing bearing the same direction of eccentricity, and the appropriate choice of eccentricity size. The accuracy of the front bearing should be higher than the accuracy of the rear bearing so that the eccentricity of the front end of the spindle component is minimal after assembly. In the maintenance of the machine tool to remove the spindle bearings, the original manufacturer has adjusted the eccentric position of the bearing, so before the demolition to do a good job in the circumferential direction of the mark, to ensure that the re-assembly of the bearing and the spindle relative to the original position of the same, influences.
In the case of
Interference with the assembly of the need to use hot or cold assembly process to install, do not brute force to knock, so as not to damage the installation process in the bearing, affecting machine performance.
In the case of
2, the installation of ball screw nut vice debugging precautions
In the case of
Ball screw nut pair is only used to withstand axial load. Radial force, bending moment will cause the ball screw to produce additional surface contact stress and other adverse load, which may cause permanent damage to the screw. Therefore, when the ball screw nut is attached to the machine,
In the case of
(1) Ball nuts should be moved within the effective travel, must be set at both ends of the stroke limit, to avoid the nut from the screw shaft, leaving the ball off.
In the case of
(2) As the ball screw nut auxiliary drive efficiency is high, can not be self-locking, in the vertical direction of transmission, such as the weight of the components without balance, must prevent the drive to stop or the motor after the loss of power, , To prevent reverse drive method available: worm gear drive, electric brake and so on.
In the case of
(3) The axis of the lead screw must be parallel to the axis of the supporting rail, and the center of the bearing housing at both ends of the machine must be in the center of the center of the nut.
In the case of
In the case of
(5) When the nut is fitted into the nut mounting hole, avoid impact and eccentricity.
In the case of
(6) In order to prevent chip entry, wear ball screw nut pairs, can be installed protective equipment such as wrinkle protective cover, spiral steel protective cover, the screw shaft fully protected. In addition, the dust for several hours in the screw nut at both ends to increase the dust ring.
In the case of
3, linear rolling guide installation and commissioning precautions
In the case of
(1) when installed gently, to avoid the impact of rails affect the accuracy of the line.
In the case of
(2) Do not allow the slider to be detached from the rail or overturned. If you need to remove the slider due to difficulty in installation, use a guide rail.
In the case of
(3) When the straight rolling guide is used in pairs, divide the main and auxiliary rails, first install the main guide rails, set the reference side of the guide rails closely with the reference side of the installation steps, tighten the mounting bolts, and then the main rail As a benchmark, find the installation of deputy guide rail vice.
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