Precautions for installation and commissioning of CNC machine parts

1. Precautions for equipment debugging of spindle bearings

(1) Equipment debugging for a single bearing

Whenever possible, the amount of pain in the positioning hole of the main shaft and the diameter of the main shaft and the amount of pain in the inner ring of the bearing and the raceway should be close to each other, so that the amount of pain can be reduced after the device.

(2) Equipment debugging for two bearings

When using two-supported spindle bearing equipment, the direction of the amount of pain of the front and back support bearings should be the same, and the size of the distance of the pain should be properly selected. The accuracy of the front bearing should be one level higher than that of the rear bearing to minimize the amount of pain in positioning the front end of the rear spindle component of the equipment. When repairing a machine tool to disassemble the spindle bearing, the original manufacturer has adjusted the bearing's partial orientation, so make sure to mark the circumferential direction before disassembly to ensure that the original relative orientation of the bearing and the spindle does not change after re-equipment. Influence of spindle components.

The bearing equipment of the interference cooperation needs to be equipped with hot or cold mounting technology. Do not brute force to prevent the bearing from being damaged during the equipment process and affect the function of the machine tool.

2.Precautions for equipment debugging of ball screw nut pair

The ball screw nut pair is only used for bearing axial load. Radial forces and bending moments can cause undesirable loads such as additional surface contact stress on the ball screw pair, and then may cause permanent damage to the screw. Therefore, when the ball screw nut auxiliary equipment is brought to the machine tool, pay attention to:

(1) The ball nut should be moved within the useful stroke. It is necessary to equip the two ends of the stroke with a limit to prevent the nut from detaching from the screw shaft and causing the ball to fall.

(2) Because the ball screw nut pair has high transmission efficiency and cannot be self-locking, when it is used in straight direction transmission, if the weight of the component is not balanced, it is necessary to prevent the reverse of the component due to the weight of the component after the transmission is stopped or the motor loses power. Transmission, anti-reverse transmission methods are available: worm gear, electric brake, etc.

(3) The axis of the screw must be parallel to the axis of the supporting guide rail, and the base of the bearing seat at both ends of the machine tool and the base of the nut seat must be aligned at three points.

(4) Do not remove the nut from the screw shaft when the ball screw nut auxiliary equipment is on the machine. If necessary, use auxiliary sleeves, otherwise the balls may fall during loading and unloading.

(5) When inserting the nut into the hole of the nut seat device, avoid hitting and partial pain.

(6) In order to prevent chips from entering and wearing ball screw nut pairs, protective equipment such as crease maintenance cover and spiral steel belt maintenance sleeve can be added to completely maintain the screw shaft. In addition, dust dust can be added to the two ends of the screw nut.

3.Cautions for debugging of linear rolling guide rail equipment

(1) Handle the device gently to prevent it from impacting the linear accuracy of the guide rail.

(2) It is not allowed to detach the slider from the guide rail or push it back over the stroke. If the equipment is difficult, you need to use the guide rail when you need to remove the slider.

(3) When the linear rolling guide rails are used in pairs, they are divided into the main and auxiliary guide rails, and the main guide rails of the main equipment. The reference side of the guide rails is closely attached to the reference side of the equipment steps. As a reference, align the auxiliary guide rail of the equipment.