In this case, the line is narrow, 02mm, and can be contoured, and it is not suitable to follow the original outline. Therefore, the font needs to be redesigned into a single line word, as shown in the figure 33, 27, and the middle line is redesigned. The lettering uses a single-edge end mill as shown, with a back angle of 10 and a taper angle (1+2) determined by the depth of the cut and the width of the line. When the word line width is 02 mm and the processing depth is 031 mm, the taper is 36 (22). The actual taper angle is 30 (1 + 2) to compensate for the fillet of the blade tip. The maximum contact positive pressure between the O-ring and the seal pair increases as the oil pressure increases. The maximum contact positive pressure determines the sealing effect of the O-ring. In order to ensure the sealing performance of the O-ring, it is necessary to give the O-ring a compression ratio, but this compression ratio cannot be blindly increased. Excessive compression ratio, on the one hand, may cause compression and permanent deformation of the O-ring during installation; on the other hand, the O-ring generates a large equivalent VonMises stress, which causes the O-ring material to fail and lower its Service life. CNC machining process card technology card part code part name KZ01 engraving plate material name ZY102 material state tempering blank forming fixture name special folder with injection process number work type content tool program name 1 inspection 1 check whether the blank meets the requirements 2 chuck axis and machine tool X-axis parallel 3 Check whether the fixture is clamped firmly 4 Check whether the machining origin is correct 2 Lettering (coarse) Guarantee: Font position 02mm single-edge end mill execution program kezic.cut3 lettering (fine) Guarantee: word line width 02mm02mm single-edge vertical milling Knife execution program kezij.cut3 programming Because the manufacturing engineer CAXA software purchased by my company does not support multi-axis programming, it is divided into blocks according to the characteristics of the parts (the diameter of the dial is 260mm, and after dividing it into 60 equal parts, For each part, it can be processed by three-axis technology. The specific steps are: 1 to construct the normal plane of the cone surface; 2 to create a single line body word in its plane; 3 to generate a single line body word contour machining tool path; 4 Use the existing tool path to generate the projection machining tool path on the cone surface; 5 series 60 projection machining tracks constitute me The programs we need. This ensures that the depth of the lettering on the cone surface is consistent. CNC machining equipment: Huazhong ordinary three-axis CNC milling machine and universal indexing head. Trial machining process: install the workpiece, correctly select the starting point, and the linkage mechanism works normally. When the lettering layer is peeled off: the adhesion of the paint layer is small, and the thickness of the paint layer is reduced. The depth of the word or stroke is too deep: check the corresponding machining program. Using the performance of the machine tool, the method of modifying the coordinate system is used to reduce the positioning time of the clamping, thereby improving the processing time. Detection: With a multi-axis machine tool lettering on a conical surface, the tool should always be perpendicular to the conical surface. However, when machining with a three-axis machine, the tool is not perpendicular to the surface but perpendicular to the axis of the workpiece. In this way, the width of the processed line changes. Therefore, the laser scanner is used to detect the width of the line is 020205mm, which can fully meet the design requirements. Conclusion Because of the uncertain factors involved in the artificial process and other parties involved in the programming process, it is necessary to conduct trial processing before formal processing. In the first processing, Shenzhen Huaya four-axis CNC milling machine was used. The second time was the Huazhong three-axis CNC milling machine and universal indexing head. The lettering on the cone surface was not only clear and uniform, but also well-written. The effect is ideal. The idea of ​​programming is broadened, so that similar parts can completely get rid of the dependence on multi-axis machine tools, thus expanding the application range of CNC machine tools and reducing the cost of products. (Finish) Jiangyin Yuanfang Machinery Manufacture Co., Ltd , https://www.yuanfangmachine.com
Talking about the Numerical Control Technology of Cone-shaped Lettering