Gantry Type Machining Center
Gantry type machining center is a highly developed machine tool that can deal with many heavy-duty precision machining tasks all at once. At first, machine center is developed from milling machines at the mid of the last century and since then, the development of this specific type of machine tools goes well in the industry, and after that, machine centers are widely applied in all kinds of industries, contributing a lot to the world industrial development.
Milling process is the process of machining that utilizes spinning tools to remove work piece materials by advancing a tool into one or several work pieces. This machining method could be done on different directions. Besides turning, milling covers a wide variety of various operations and ranges a wide scale from single tiny parts to heavy and large milling operation tasks. Similar to turning, milling is one of the most usually adopted machining methods that achieve precision tolerances within accurate standards.
The useful and practical natures of machine centers stimulate the development of milling methods, which is later highly popular in the industrial world that demands for even strict machining accuracy. Its productive and effective nature for rendering work pieces with complex profiles is comparatively hard to achieve by conventional turning lathes. With this expectation, the following development and the idea of machine centers are thus gradually formed. The phrase “machining center” can be used to describe a wide variety of CNC (Computer Numerical Control) drilling and milling machineries that are accommodated with several critical but sometimes optional accessories equipped together with the machine body itself, such as tool magazine, ATC (automatic tool changer), power tool turret, CMM (Coordinate Measuring Machine), multi-axis working tables, etc.
The inventory of machining centers can be roughly divided into two main categories: vertical and horizontal, and there are still other categories in the machining center inventory. Vertical machining center is the arrangement of its structure that aligns vertically, and the work pieces are machined by cutting tools that go up and down vertically. On the contrary, horizontal machining centers have the spindle arranged horizontally and the machining is conducted lying flat. With the vertical design, the weight of the work piece would help to make itself sternly located on the clamp for heavy vertical cutting route without much worry on route deviation. Furthermore, by the help of powered turret, the cycle time is thus shortened in a significant scale. The work piece machining of machine centers are normally not of round shape but other complicated profiles since the former one can be dealt with by turning machine with power turret in a much more productive manner.
Rotational speed per minute, RMP, of the spindle is a key parameter that determines the performance of the machining center. For gantry type models, the RPM (revolutions per minute) standards differ and there is no such a common range. Meanwhile, manufacturers in the Europe, Japan, and Taiwan have their consensus way of RPM standards, while the regional differences still are significant. Therefore, when customers are looking for an optimal gantry type machining centers for their production lines, the specification issues are a great concern since that would determine the final results.