With the versatility of CNC lathe machine, the processing time of spherical workpieces and other factors will become more and more efficient. The focus of spherical machining will increasingly shift to surface quality. At the same time, due to the better surface quality, many optical tasks can be solved more and more effectively. Therefore, the spherical processing tool has a very important meaning for the surface quality of the workpiece. This article will briefly introduce what kind of knife the CNC lathe uses to process the spherical surface.
Spherical machining usually requires high profile accuracy and surface roughness. It is difficult to obtain a spherical surface with high profile accuracy and high surface quality by ordinary processing methods.
Spherical workpieces are widely used in surveying, aerospace (spectrometers installed in satellites) or medical technology (slit lamps used to check the anterior segment of the eye). Due to low manufacturing cost, fast production time and wide range of optical applications, the sphere is an indispensable part of the optical market and has a very good cost performance.
What kind of knife is used for CNC lathe processing of spherical surface
Conventional processing methods for spherical surfaces mainly include turning and milling. The milling efficiency is low, and the machining accuracy and surface roughness are not high. Therefore, parts with high precision requirements usually do not use this processing method. In contrast, the efficiency of machining a spherical surface with a CNC lathe is much higher, and the machining accuracy and surface roughness are also very good. It is an ideal processing method without special equipment. Turning accuracy is affected by many factors such as the accuracy of the machine tool, the numerical control system, and the selection of cutting tools.
CNC lathes are used to process spherical surfaces with arc cutters. When the arc cutter is set at an angle other than the axis of the turntable and the part rotates under the cutter, a spherical surface will be generated. The angle of inclination of the drill bit represents the chord of the desired ball segment. With a single-point cutting tool, the cutting edge is reversed according to whether the shape is concave or convex. For convex surfaces, the cutting edge faces inward. For concave surfaces, the cutting edge faces outwards, just like in normal boring head work. When the arc tool enters the spherical workpiece, the turntable rotates 360°. The turntable also feeds the tool along the X axis.
If the CNC lathe operator has good operating skills, he can use the R-shaped arc tool to machine the entire ball; if the CNC lathe operator is average, it is recommended to choose a forming knife for processing. It is best to use CNC machine tools for large diameters. If the diameter is small and the total number is not tight, it can grind an arc knife by itself. There is no doubt that a ball end mill is used for the final finishing.
What should be paid attention to when machining spherical parts on CNC lathes
CNC lathe processing is a relatively precise job. The data during spherical processing should be carefully observed after adjustment. avoid mistakes. Now it is necessary to process spherical parts on the effect control lathe, which requires more attention to some minor issues. The following briefly introduces what should be paid attention to when processing spherical surfaces on CNC lathes.
When machining a spherical surface on a CNC lathe, it is necessary to pay attention to the accurate selection of the tool, to judge the shape of the blank, and the size cannot be affected during the finishing. When cutting the arc, pay attention to timely replacement of the cutter, otherwise it may become scrap steel. In addition, the staff should always pay attention to whether the tool deviates from the blank. Although the processing of spherical parts is controlled by the CNC lathe program, some problems that may arise should be considered when the program is first written. For example, whether the coordinates are accurate, whether the lathe is fixed, there are a lot of preparations before a part can be made.
In addition, the operators of CNC lathes should also pay attention to the fact that when machining spherical parts on the CNC lathe, they must always pay attention to whether the tool deviates, because the surface of the spherical part is relatively smooth, which may cause the tool to fall off. At this time, the operator should always pay attention to whether the workpiece is cut according to the predetermined path.
This article mainly introduces what kind of tool the CNC lathe uses to process the spherical surface. You can learn about the arc tool used in the CNC lathe to process the spherical surface. When the arc tool is set at an angle other than the axis of the turntable and the part rotates below the tool, a spherical surface will be generated. The angle of inclination of the drill bit represents the chord of the desired ball segment. With a single-point cutting tool, the cutting edge is reversed according to whether the shape is concave or convex.
