Author: MULAN -Plastic Molding Manufacturer
1. Spindle The spindle is the core component of the machine tool. Most of the machining surface accuracy is related to the spindle, so the quality of the spindle is very important. Nowadays, spindles produced in mainland China are rarely used in CNC machining centers, which shows that the quality of high-speed spindle units produced in mainland China needs to be improved.
Taiwan-made spindle units are widely used in the market, and prices vary greatly depending on brand awareness and market share. There are several brands of CNC machining center spindles commonly used in the market: Danquan, Jianchunlong, Pusen, Luoyi, and the prices are also rising. It is recommended to choose according to your own product requirements.
In general, CNC machining center manufacturers can replace equipment for you according to your requirements. Details should be discussed further with the CNC machining center manufacturer. 2. The main function of the transmission components often used in ball screw precision machinery is to convert rotary motion into linear motion, or convert torque into axial repetitive force. They have the characteristics of high precision, reversibility and high efficiency.
Its manufacturing requirements are relatively high, including raw materials and assembly precision. The ball screw determines the transmission accuracy of the equipment. Its raw material, accuracy, preload, cutting resistance, lubrication, loads, etc. can all cause rapid wear, backlash, or other uncorrectable problems with the ball screw.
So that's the point too. Ball screws commonly used in CNC machining centers can be divided into P2/C2, P3/C3, and P4/C4 according to their accuracy. There are also a few CNC machining center manufacturers who choose P5/C5 (the smaller the number, the higher the precision), and the rolling grade is divided according to the process.
and grinding grades, the latter being more accurate than the former. 3. Tool magazine The tool magazine of CNC machining center is divided into three types: hat type, disc type and chain type, and the number of tools contained in them increases in turn. The hat type tool magazine is generally close to the spindle head.
When changing tools, it needs to move up and down in the direction of the main shaft, which takes up working time and reduces work efficiency. It also affects the working stroke range in the direction of the spindle, but because of its simple structure, the failure rate is low. The disc tool magazine adopts robot tool changer, the tool changing speed is fast, but the failure rate is high, and a small number of disc tool magazines are directly interchangeable with the hat-shaped tool magazine through the spindle.
The chain type is generally used on models with more tools, and its price has gradually increased; it is more important to choose the correct brand and type. 4. Guide rails The guide rails commonly used in CNC machining centers can be roughly divided into the following three categories according to their accuracy, C ordinary level, H level high precision level, and P level ultra precision level. Generally, the guide rails of CNC machining centers are above H level.
According to the type, it can be divided into three types: hard rail, linear slide rail and inlaid steel rail. The first two are very common. The hard rail is characterized by good rigidity, but the disadvantage is that the frictional resistance is large, and the accuracy and speed are relatively low.
Suitable for large cutting volume machining. There are two types of linear guide rails commonly used in CNC machining centers, one is ball guide rails and the other is ball guide rails. The purpose of the ball guide rail is to complete the linear sliding through the rolling of steel balls, while the roller guide rail completes the linear sliding through the rolling of cylindrical rollers, and its frictional resistance is smaller than that of the hard rail.
The ball guide rail is a point contact, and the roller guide rail is a line contact, so the friction resistance of the roller guide rail is greater than that of the ball guide rail, and its rigidity is stronger than that of the ball guide rail. Therefore, there are generally two types of guide rails for CNC machining centers: hard rails and roller guide rails, and there are more ball guide rails for small engraving and milling machines.