The relief angle is mainly used to reduce the friction between the flank and the transition surface during the cutting process. When designing the indexable turning tool, it is necessary to comprehensively consider the rear corner and the front corner. After selecting the back corner of the blade, the back angle of the insert groove is determined according to the rake angle of the insert groove. The recommended values ​​for the design of the rear corner of the indexable turning tool are shown in Table 4. Previous Next Character Plaque,Hotel Decorative Wall Art Hanging Plaques,Heaven Rewards The Diligent Word Plaque,Antique Carved Yuanbao Plaque Huaxian Tangyu Garden Landscape Engineering Co., Ltd. , https://www.carvedbricks.com
Workpiece material Front angle g 0 recommended value Rough car Finishing car Low-carbon steel 13°~20° 20°~25° Carbon structural steel (normalized) 10°~15° 13°~17° Carbon structural steel (tempered) 5°~10° 8°~13° Alloy structural steel (normalized) 8°~13° 10°~15° Alloy structural steel (tempered) 5°~8° 5°~10° Gray cast iron (HT15-32, 20-40) 5°~10° 5°~10° High strength steel -5° -5°
Workpiece material Back corner recommendation Ordinary steel 5°~12° Common cast iron 6°~8° High strength steel 10°~15° Wear-resistant cast iron 8°~12
The design drawings and drawings marked with the index of the cutting parameters of the indexable turning tool are shown in Figure 1.
When designing an indexable turning tool with the physical function of AutoCAD2000, first select the blade according to the processing conditions, and then subtract the front and rear corners of the blade itself to determine all the parameters required to design the indexable turning tool. When performing solid design, the blade cannot be rotated exactly according to the required blade inclination angle and front angle. Instead, it should be converted to the forward angle. The conversion formula is tann=tang0cosls (1)
The order of blade rotation during solid modeling should be: lead angle → edge angle → normal angle. 
Figure 1 Drawing of the cutting parameters of the indexable turning tool
2 Milling of indexable turning tools
The use of CNC milling machine to machine indexable turning tools can better guarantee the dimensional accuracy of tool manufacturing, but the processing cost is high. The indexable turning tool can be processed by ordinary milling machine. Although the cost is low, usually only the front angle and the edge can be processed. A simple turning tool with an inclination of 0°. Through a lot of practice in the design and processing of indexable turning tools, the author summarizes the processing method of indexable turning tools with a composite angle (ie, the blade inclination angle and the rake angle are not 0°) on a common milling machine.