通用banner
Your current location : Home >> News >> Industry knowledge

CNC gantry milling can be equipped with rolling bearing

2021-03-22 10:21:54
a

This kind of rolling bearings of CNC gantry milling machine manufacturers can bear axial and radial loads, and their bearing capacity and bending rigidity are relatively high. However, there is rolling friction between the big end of the roller bearing and the rib of the inner hole, which causes more heat, so the allowable speed is relatively low. Common light series products, extra light series products and sticky series products of machine tool spindle bearings are dominated by extra light series products. The "lighter" the rolling bearing, the smaller the diameter of the turning body and the larger the total. The "lighter" rolling bearing is, the smaller the diameter is when the inner diameter is the same; the larger the inner diameter is when the diameter is the same. In other words, for the same spindle bearing diameter, when the rolling bearing is lighter, the diameter of the support seat hole can be smaller, but it does not harm the characteristics of the spindle bearing components; if the diameter of the support seat hole is the same, the spindle The bearing diameter can be larger, the bending stiffness of the spindle bearing is relatively higher, and the comprehensive bending stiffness of the spindle bearing components will continue to be gradually improved. Naturally, the lighter the rolling bearing, the thinner the inner and outer sides of the rolling bearing, and the more difficult it is to manufacture the rolling bearing. If there is a difference between the shape of the support seat hole and the motor shaft, it will immediately endanger the rotation precision of the rolling bearing. Therefore, the higher the manufacturing precision of the support seat hole and the motor shaft.


The effective layout of spindle bearing roller bearings for CNC gantry milling, the arrangement of two bearing machine spindle bearings, the arrangement of two bearing machine spindle bearings, including the model selection, composition and layout of the spindle bearings of the machine tool. The key basis of CNC gantry milling is to specify the speed ratio, bearing capacity, bending stiffness and precision of the spindle bearing components of the designed scheme. The common two-bearing spindle bearing roller bearing layout method is obtained. The following general standards should be followed when clarifying the arrangement of two bearing machine spindle bearings:

数控龙门铣床

1) Incorporating the requirements of bending rigidity and bearing capacity should first achieve the required bending rigidity and bearing capacity. When the axial load is very large, the rolling bearing can be equipped with the method; compared with the hour, the equipped method can be used. In addition, the double-row rolling bearing has higher bending stiffness than the row item. Because the bending rigidity of the lifting front support can reasonably increase the bending rigidity of the spindle bearing components, the rolling bearing that improves the bending rigidity should be equipped with the front support.


2) The maximum speed allowed for rolling bearings with different specifications, specifications, and accuracy levels is different for CNC gantry milling. Under the same standard, the point contact is higher than the line contact; the cylindrical roller bearing is higher than the ring tapered roller bearing. Therefore, it is necessary to comprehensively consider the requirements of the bending stiffness and the speed ratio of the spindle bearing components to select the rolling bearing configuration method.


3) Incorporating the requirements of precision. The method of arranging the thrust ball bearing of the spindle bearing component to assume the radial direction immediately jeopardizes the precision of the radial position of the spindle bearing. The working characteristics and application scope of the three common equipment methods. When the front is accurately positioned, the main shaft bearing will widen backwards due to thermal deformation, which will not affect the machining accuracy, but the front support structure is cumbersome, it is inconvenient to adjust the gap of the rolling bearing, and the front support is very hot. The precise positioning characteristics of back-end development are reversed. When the two sides are accurately positioned, the radial clearance of the rolling bearing changes greatly when the main shaft bearing is stretched under heat.


The label

0

Service hotline

0760-8540-3246

Address: Ju'an Management Zone, Sanjiao Town, Zhongshan City, Guangdong Province

URL:www.juli999.com/

WeChat official account