Hard alloy four-edge ball-end milling cutter for finish machining of high-temperature alloy blades

Abstract

The utility model discloses a hard alloy four-edge ball-end milling cutter for finish machining of high-temperature alloy blades, the milling cutter consists of a cutting part and a handle part, the cutting part consists of circumferential edges and a ball-end part, each circumferential edge consists of four right-handed rotation right-cutting spiral edges, and spiral chip grooves are uniformly distributed among the circumferential edges; ball head blades are evenly distributed on the ball head part, and arc-shaped chip grooves are formed between the ball head blades. According to the utility model, the structures of the circumferential blade and the ball head part are designed, and key parameters such as a spiral angle, a circumferential blade front angle and a circumferential blade rear angle of a spiral chip groove of the circumferential blade, and an opening angle, a ball head front angle and a ball head rear angle of an arc-shaped chip groove of the ball head part are selectively optimized, so that the cutting edge strength of the ball head part is ensured; the sharpness of the cutting edge of the ball head part is enhanced, the cutting resistance is reduced, the quality of the cutting edge of the ball head part is improved, the initial abrasion stage of the cutter is shortened, and the service life of the cutter is prolonged. In addition, the milling cutter has good chip containing and discharging performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ball end mill, in particular to a hard alloy four-blade ball end mill for high-temperature alloy blade finishing. BACKGROUND

[0002] In gas turbine engines, whether it is a compressor blade or a turbine blade, the number is the most, and the engine relies on these numerous blades to complete the compression and expansion of the gas and produce powerful power to push the plane forward with the highest efficiency. The blade is a special part, which has many quantities, complex shape, high size precision and surface roughness, and is difficult to process. It is a key component of the engine, and the manpower, material resources and financial resources invested are large. The performance of the blade is continuously improved, which puts forward higher requirements for the cutting performance of the tool.

[0003] For the machining of high-temperature alloy blades, milling is mainly carried out by using the ball nose edge of the tool, especially finishing, which requires higher performance of the tool. When the ball nose part edge wears slightly, it will affect the size accuracy of the processed product. Therefore, the ball nose part edge should have good retention, and the ball nose chip space and chip removal should be high. However, the ball nose rake angle, ball nose relief angle and ball nose edge quality are the key parameters that affect the ball nose edge. The ball nose chip space is small, easy to accumulate chips, and not conducive to heat dissipation. Therefore, the reasonable selection of the structure and parameters of the tool can meet the high requirements of high-temperature alloy blade finishing. SUMMARY

[0004] The utility model discloses a hard alloy four-blade ball end mill for high-temperature alloy blade finishing. It is used to solve the technical problems mentioned in the background art.

[0005] The technical scheme of the utility model discloses a hard alloy four-blade ball end mill for high-temperature alloy blade finishing, which is composed of a cutting part and a handle. The cutting part is composed of a peripheral edge and a ball nose part. The peripheral edge is composed of four right-hand right-cut spiral edges, and spiral chip removal grooves are evenly distributed between the peripheral edges. The ball nose part is evenly distributed with ball nose edges, and there are circular-arc chip removal grooves between the ball nose edges. The spiral angle of the spiral chip removal groove of the peripheral edge is 40°-45°, the peripheral edge rake angle is 5°-8°, and the peripheral edge relief angle is 12°-15°.

[0006] In the foregoing hard alloy four-blade ball end mill for high-temperature alloy blade finishing, the opening angle of the circular-arc chip removal groove of the ball nose part is 75°-80°, the ball nose rake angle is 4°-6°, and the ball nose relief angle is 12°-15°.

[0007] The utility model discloses a beneficial effect: compared with prior art, the hard alloy four -blade ball head milling cutter through the structure of the peripheral edge and ball head part is designed to the spiral angle of the spiral chip flute of peripheral edge, peripheral edge rake angle, peripheral edge relief angle and to the opening angle of the arc chip flute of ball head part, ball head rake angle, ball head relief angle key parameter optimization, while guaranteeing the ball head part edge strength, the sharpness of ball head part edge is strengthened, the cutting resistance is reduced, the ball ball head part edge quality is improved, the initial wear stage of tool is shortened, makes it reach normal wear stage faster, thereby guaranteeing the size precision of high temperature alloy blade product while prolonging the service life of tool. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is the structure schematic diagram of the utility model;

[0009] Figure 2 It is Figure 1 the side structure schematic diagram of;

[0010] Figure 3 It is the angle distribution schematic diagram of ball head part;

[0011] Figure 4 It is the angle distribution schematic diagram of peripheral edge.

[0012] Reference signs: 1-cutting part, 2-shank, 3-peripheral edge, 4-ball head part. DETAILED DESCRIPTION

[0013] The utility model will be further explained in connection with the drawings and examples, but not as the basis for the limitation of the utility model.

[0014] The utility model discloses an embodiment: a kind of hard alloy four -blade ball head milling cutter for high temperature alloy blade finishing, the hard alloy four -blade ball head milling cutter is composed of cutting part 1 and shank 2, cutting part 1 is composed of peripheral edge 3 and ball head part 4, peripheral edge 3 is composed of four right-handed right-cut spiral edges, and spiral chip flute is uniformly distributed between peripheral edge 3;Ball head part 4 is uniformly distributed with ball head cutting edge, and there is arc chip flute between ball head cutting edge;The spiral angle of the spiral chip flute of peripheral edge 3 is 40 °~45 °, peripheral edge rake angle is 5 °~8 °, and peripheral edge relief angle is 12 °~15 °.The opening angle of the arc chip flute of ball head part 4 is 75 °~80 °, ball head rake angle is 4 °~6 °, and ball head relief angle is 12~15 °.

[0015] The cutting part 1 of the hard alloy four-blade ball head milling cutter is composed of a peripheral blade 3 and a ball head part 4, the structure of the peripheral blade 3 and the ball head part 4 is designed, the spiral angle of the spiral chip groove of the peripheral blade 3, the peripheral blade rake angle, the peripheral blade relief angle, and the opening angle of the arc-shaped chip groove of the ball head part 4, the ball head rake angle and the ball head relief angle are selected and optimized, the sharpness of the ball head part 4 is enhanced while the strength of the ball head part 4 is ensured, the cutting resistance is reduced, the quality of the ball head part 4 is improved, the initial wear stage of the cutter is shortened, the cutter reaches the normal wear stage more quickly, and the service life of the cutter is prolonged while the size precision of the high-temperature alloy blade product is ensured. Moreover, the hard alloy four-blade ball head milling cutter has good chip accommodation and chip removal performance, and is not prone to chip accumulation, and is beneficial to heat dissipation of the cutter.

Claims

1. A carbide four-flute ball end mill for finishing high-temperature alloy blades, characterized in that: The carbide four-flute ball end mill consists of a cutting part (1) and a shank (2). The cutting part (1) consists of a peripheral cutting edge (3) and a ball end mill (4). The peripheral cutting edge (3) consists of four right-handed right-cutting helical cutting edges. Helical chip removal grooves are evenly distributed between the peripheral cutting edges (3). Ball end mills are evenly distributed on the ball end mill (4). There are arc-shaped chip removal grooves between the ball end mills. The helical angle of the helical chip removal groove of the peripheral cutting edge (3) is 40° to 45°, the rake angle of the peripheral cutting edge is 5° to 8°, and the clearance angle of the peripheral cutting edge is 12° to 15°.

2. The carbide four-flute ball end mill for finishing high-temperature alloy blades according to claim 1, characterized in that: The opening angle of the arc-shaped chip removal groove of the ball head part (4) is 75° to 80°, the front angle of the ball head is 4° to 6°, and the rear angle of the ball head is 12° to 15°.

Images