1. The new guideway system of linear guideway enables the machine tool to obtain rapid feed rate. Under the condition of the same spindle speed, rapid feed is the characteristic of linear guideway. Like plane guide, linear guide has two basic elements: one is fixed element, the other is moving element. In order to ensure the accuracy of the machine tool, a small amount of scraping and grinding of the bed or column is necessary. In general, the installation is relatively simple. There is no intermediate medium between the moving element and the fixed element of linear guide, but rolling steel ball is used. Because the rolling steel ball is suitable for high-speed movement, small friction coefficient and high sensitivity, it can meet the working requirements of moving parts, such as tool rest and carriage of machine tool. When the working time is too long, the steel ball begins to wear, and the preload acting on the steel ball begins to weaken, which leads to the reduction of the movement accuracy of the working parts of the machine tool. If the initial accuracy is to be maintained, the guide rail bracket must be replaced, or even the guide rail. Ti Hao machinery is the company's main products including rotary center, lead screw, machine tool spindle, shaft processing, high-precision toolholder, cutter bar, elastic chuck, non-standard parts processing and machine tool extension rod! If the rail system is already preloaded. The accuracy of the system has been lost, and the only way is to replace the rolling element.
2. Linear roller guideway linear roller guide system is a combination of plane guide rail and linear roller guide rail. The roller is installed on the parallel guide rail, and the moving parts of the machine tool are carried by roller instead of steel ball. The advantages are large contact area, large load bearing capacity and high sensitivity. From the end of the bed, the support and roller are placed on the top and side of the plane guide rail. In order to obtain high precision, a wedge plate is set between the working parts of the machine tool and the inner surface of the support to make the preload act on the side of the support. The working principle of wedge plate is similar to that of inclined iron, and the weight of working parts acts on the top surface of support. Because the preload acting on the guide rail system is adjustable, the loss of wedge plate can be compensated. This feature is widely used in medium or large machine tools, because it is sensitive to CNC instructions and bears large load. The linear roller guide system can withstand high speed operation than the traditional plane guide function and improve the performance of the machine tool.
3. Steel inlaid guide rail
The most common form of guide rail on machine tool is inlaid steel guide rail, which has been used for a long time. The steel inlaid guide rail is a fixed component of the guide rail system, and its cross section is rectangular. It can be installed horizontally on the bed of the machine tool, and can also be cast into one body with the bed. It is called inlaid steel type or integral type respectively. The steel inlaid guide rail is made of steel, hardened and ground. If the hardness is above 60 degrees of Rockwell hardness, stick the steel inlaid guide rail with screws or adhesive (epoxy resin) on the machine bed or the matching surface of the column after scraping, so as to ensure the best flatness of the guide rail. This form is convenient and simple for maintenance and replacement, and is very popular with maintenance workers.
4. The development of the traditional guide rail of sliding guideway is firstly manifested in the sliding elements and the form of the guide rail. The characteristic of the sliding guide rail is that the medium is used between the guide rail and the sliding part, and the difference in the form lies in the selection of different media. Hydraulic pressure is widely used in many rail systems. Hydrostatic guideway is one of them. Under the action of pressure, hydraulic oil enters the groove of sliding element, forms oil film between guide rail and sliding element, separates guide rail and moving element, so as to greatly reduce friction force of moving element. Hydrostatic guideway is very effective for heavy load and can compensate eccentric load. Ti Hao machinery is the company's main products including rotary center, lead screw, machine tool spindle, shaft processing, high-precision toolholder, cutter bar, elastic chuck, non-standard parts processing and machine tool extension rod! For example: a large sand box in the processing, just go to the end of the machine tool travel, load guide rail can increase the oil pressure, so that the guide rail accurately maintain the state of horizontal load. Some horizontal boring and milling machines use this technology to compensate for the decrease of spindle speed during deep hole processing. Another kind of guide rail form using oil as medium is dynamic pressure guide rail. The difference between dynamic pressure guide rail and static pressure guide rail is that oil does not work under pressure. It uses oil viscosity to avoid direct contact between moving elements and guide rail, with the advantage of saving hydraulic oil pump