The turn-milling compound CNC machining machine tool is a typical turn-milling compound CNC machining center with high precision, high efficiency, high rigidity, high automation and high flexibility. The turn-milling compound CNC lathe is an advanced composite machine tool composed of a five-axis linkage milling CNC machining center and a double-spindle lathe. It provides a better solution for CNC machining of small parts with high precision, high quality and high complexity.
With the rapid development of science and technology in the world, many products are developing in the direction of precision, miniaturization and lightweight. Many small precision CNC machine tools often need to meet the needs of users. In the current Chinese machine tool products, there is still a lack of such precision CNC machine tools. In addition to being widely used in the watch industry, medical equipment, auto parts manufacturing and other light industry fields, it can also be used in aerospace, weapons, ships and other national defense and military fields to process many precision special parts, such as flight control gyroscope, air-to-air missile inertial navigation and other zero machines, is a high-quality machine tool suitable for CNC machining of small precision complex parts on the market.
Turn-mill CNC machining centers do not have special requirements for machine tools, but must provide at least one Y-axis movement. The rotation of the workpiece provides the C-axis motion of the cutter to transfer the required feed rate (power). However, the cutting speed of the workpiece is measured with the IPM and not the SPM of the lathe (which means that the cutting speed of the workpiece at the turn-mill machining center is much lower than the cutting speed at turning). But the movement of the Y-axis is a must, because the milling cutter has to do a lot of eccentric machining.
Moreover, when the tool is eccentric, the required part size cannot be machined, because when the tool is in the center, the center of the tool intersects the center of rotation of the part, so the tool can only be cut with its end face (that is, it cannot be cut), but not cut. Trimming. In order to ensure that the cutting edge can be cut correctly, the tool centerline must deviate from the part centerline of rotation to 1/4 of the tool diameter.
There are three types of tools that can be effectively used in a mill-turn machining center. The main reason is the use of wiper blades or scrapers. For end mills in turning and milling, large-size flat or heavy-duty interrupted cuts can be made. Step milling uses insert end mills. Solid end mills are used to machine cylindrical parts, precision milling deep and narrow slots. Using the scraper structure of the above-mentioned tool, it is possible to cut the deep part of the part through two of the four cutting edges of the tool, so as to achieve high-efficiency and high-precision CNC machining.
But with this method, problems arise when the cutter approaches both sides of the steps and grooves. At this point, after the eccentric tool is machined, many fillets are left on the surface of the part. In order to remove these fillets, the tool must be machined again. Tool deviations are no longer required, and the tool moves along the Y axis to the center of the part for machining. However, this allowance is not allowed in some machining steps (sometimes metal).
An unsatisfactory fact in the machining of a turn-mill compound CNC machining center is the shape error of the machined parts. When the milling cutter mills around a part, it is inevitable that some fan-shaped marks will form on the surface of the part at certain intervals. This error cannot be completely eliminated, but it can be effectively controlled with wiper blades. One polishing blade follows the other blades closely, so that the cutting edge is slightly convex in the width direction, so that the cutting edge of the insert just extends to the surface of the machined part, and a new cutting surface is machined, and the slight fan-shaped marks are smoothed.