A face milling cutting head, comprising a indexable face milling cutting insert and a face milling cutter head for clamping the indexable face milling cutting insert, the indexable face milling cutting insert which comprises an insert body (1) and a cutting body (2) arranged on an upper surface of the insert body (1), wherein the indexable face milling cutting insert is prismoid-shaped;
- the insert body (1) and the cutting body (2) are in smooth transition;
- the insert body (1) comprises multiple positioning side surfaces (11), an upper plane (12), and a positioning bottom surface (13);
- the cutting body (2) is arranged on the upper plane (12) of the insert body (1);
- an area of the upper plane (12) is larger than an area of the positioning bottom surface (13);
- a projection (12) of an edge of the positioning bottom surface (13), or an extension line thereof, on a rake face (21) is intersected with a corresponding edge of the rake face (21), or an extension line (13) thereof, to form a surface deflection angle (23), the upper plane (12) of the indexable face milling cutting insert is rotated clockwise relative to the positioning bottom surface (13) around a central shaft (11) of the indexable face milling cutting insert, the upper plane (12) of the indexable face milling cutting insert is rotated counterclockwise relative to the positioning bottom surface (13) around the central shaft (11) of the indexable face milling cutting insert, multiple face milling insert retaining slots (111a) are formed in the face milling cutter head, a shape of each of the multiple face milling insert retaining slots (111a) is matched with a shape of the indexable face milling cutting insert, and each of the multiple face milling insert retaining slots (111a) comprises a pre-positioning surface (114a), a first positioning side surface (115a) and a second positioning side surface (116a), the face milling cutter head comprises a horn-shaped cutter head main body (1a) and an adjusting block (2a) and a locking wedge block (3a), the adjusting block (2a) and the locking wedge block (3a) are provided on the cutter head main body (1a), wherein
- the cutter head main body (1a) comprises a milling insert holder (11a) and a cutter stem connecting portion (12a) and a transition portion (13a), the transition portion (13a) is arranged between the milling insert holder (11a) and the cutter stem connecting portion (12a), wherein
- the milling insert holder (11a) is circular cylinder shaped or hollow truncated cone shaped, the multiple face milling insert retaining slots (111a) and multiple wedge block mounting scrap discharge slots (112a) which are communicated with adjacent face milling insert retaining slots (111a) are formed in a working end surface of the milling insert holder (11a), and multiple milling insert support bases (113a) are formed on a working end surface of the milling insert holder (11a);
- a first preset angle is formed by the second positioning side surface (116a) and a plane of an end surface of the milling insert holder (11a), the first positioning side surface (115a) and the end surface of the milling insert holder (11a) form a radial front angle (1151a), and the first positioning side surface (115a) and an axis of the milling insert holder (11a) form an axial front angle (1152a);
- wedge block mounting holes (118a) are formed in the wedge block mounting scrap discharge slots (112a) in a radial direction of the milling insert holder (11a), and axes of each of the wedge block mounting holes (118a) and the first positioning side surface (115a) form a second preset angle.