What Precision Horizontal Machining Center Do I Need?

The accuracy grade of the selected machining center is mainly determined according to the accuracy of the key parts of the typical parts. Its accuracy mainly includes positioning accuracy, repeated positioning accuracy and milling accuracy, especially repeated positioning accuracy, which reflects the positioning stability of the coordinate axis and is a basic indicator to measure whether the axis is stable and reliable. It is particularly worth noting that a comprehensive analysis must be carried out when selecting and ordering. You cannot simply look at the precision values listed in the product samples. Because of different standards, different specified values, and different detection methods, the meanings of the values are different. The allowable plus and minus values (usually plus or minus 0.05) of the unit length listed in publications, samples, and certificates of conformity are often unclear. Special attention should be paid when ordering. VDI (German Standard), JIS (Japanese Standard), NMTBA (American Machine Tool Manufacturers Association Standard) or NAS (American Standard) and GB (Chinese Standard), etc., and then analyze the detection calculation method and detection environment specified by various standards conditions so that there will be no misunderstandings. The milling accuracy is one of the main indicators to comprehensively evaluate the servo following motion characteristics of the CNC axis and the interpolation function of the CNC system in the horizontal machining center. Regardless of whether a typical part needs it or not, this indicator must be taken into account for possible future needs and for better control of accuracy. Special attention should be paid to the distinction between machining accuracy and machine tool accuracy. It is wrong to regard the position accuracy on the manufacturer's sample or the product certificate as the machining accuracy of the horizontal machining center. The position accuracy indicated on the sample or certificate is the accuracy of the machining center itself, and the machining accuracy is the sum of the errors caused by various factors of the entire process system including the allowable error of the horizontal machining center itself. The reasons for the error of the whole process system are very complex, and it is difficult to express quantitatively with a linear relationship. When selecting the type, the evaluation method of the process capability coefficient Cp can be referred to as the selection basis for the machining accuracy of the machine tool. In general, Cp should be greater than 1.33. Several high-precision horizontal machining centers in the station: MH-630B, LH-300A, MH-500B, TH500 moving column horizontal machining centers have good performance.