Milling cutter provided with equidistant arc head on eccentric shape flank surface and grinding method

Abstract

The present invention relates to a milling cutter provided with an equidistant arc head on an eccentric shape flank surface and a grinding method, the cutter can reduce the vibration during the process of processing of different hardness of hardened steels for splicing of a mould, the cutter life and workpiece surface quality can be improved, the flank surface shape can be changed, and the cutter tip strength can be improved. The milling cutter is an overall hard alloy end milling cutter. The milling cutter includes a cutter shank (1) and the arc head (2), the arc head includes a large curvature arc (2-1) and a small curvature arc (2-2). Tooth-spacing angles are 87 degrees, 93 degrees, 87 degrees, and 93 degrees, tooth-spacing vertical angles are equal, helix angle (r) is 38 degrees, helix angle (v) is 40 degrees, and cutter end cutting edge flank surface (10) and circumferential cutting edge (6) are in eccentric shape. Front angle is in the range of 0-3 degrees, first clearance angle is in the range of 8-10 degrees, and second clearance angle is in the range of 15-22 degrees. The center position of the cutter is provided with cooling channels (3), the number of the cooling channels is four, and the four cooling channels respectively are located four cutting edge end tooth chip pockets. The present invention also provides a reference for the grinding of the cutter of the type.

Description

technical field

[0001] The invention relates to a milling cutter with an eccentric flank and an arc head with unequal distances and a grinding method. Background technique

[0002] For molds with free-form surfaces of small curvature, such as automotive panels, whose structural shapes are complex. The processing of automotive panels mainly uses ball end milling cutters and ring milling cutters. When machining free-form surfaces with small curvature in three-axis, the ball end milling cutter has narrow processing bandwidth, small step distance, low efficiency and low precision. Especially for the hardened steel splicing mold with different hardness, the wear and damage of the tool caused by the vibration caused by the machining and the low surface precision of the workpiece restrict the development of automobile panels. In recent years, in order to improve processing efficiency, non-spherical end milling cutters (ellipsoidal end milling cutters and hyperbolic spherical end ...

Examples

specific Embodiment approach 1

[0031] Specific implementation mode one: combine figure 1 , 2 , 4. An eccentric flank with unequal arc head milling cutter and grinding method, the cutter is of integral structure, and the cutter material is cemented carbide. The milling cutter includes a shank (1) and an arc head (2), the diameter of the shank is 8mm, the arc head includes a small curvature arc (2-2), the arc radius is 5mm, and a large curvature arc (2- 1), the arc radius is 1mm. The arcs at both ends are smoothly connected to form the arc head of the milling cutter. Effect: under the same pitch, increase the cutting bandwidth (d 2 >d 1 ), improved processing efficiency and improved processing quality (Δh 2 1 ).

specific Embodiment approach 2

[0032] Specific implementation mode two: combination figure 1 , 3 An eccentric flank with unequal distance arc head milling cutter and its grinding method, the included angle between (A-A) is 87°, the included angle between (B-B) is 93°, the helix angle (r) is 38°, and the helix angle (v) is 40°. Effect: It avoids the impact of different hardness of hardened steel splicing molds on the machining stability during the cutting process, reduces the tool vibration during the cutting process, and improves the tool life and the surface quality of the processed workpiece.

specific Embodiment approach 3

[0033] Specific implementation mode three: combination Figure 6 , 7 Disclosed is a milling cutter with an eccentric flank and an arc head with unequal distances and a grinding method thereof, wherein the end flank (6) and the peripheral flank (10) of the cutter are eccentric. Effect: It can protect the cutting edge, reduce tool wear and prolong tool life.

technical field

[0001] The invention relates to a milling cutter with an eccentric flank and an arc head with unequal distances and a grinding method. Background technique

[0002] For molds with free-form surfaces of small curvature, such as automotive panels, whose structural shapes are complex. The processing of automotive panels mainly uses ball end milling cutters and ring milling cutters. When machining free-form surfaces with small curvature in three-axis, the ball end milling cutter has narrow processing bandwidth, small step distance, low efficiency and low precision. Especially for the hardened steel splicing mold with different hardness, the wear and damage of the tool caused by the vibration caused by the machining and the low surface precision of the workpiece restrict the development of automobile panels. In recent years, in order to improve processing efficiency, non-spherical end milling cutters (ellipsoidal end milling cutters and hyperbolic spherical end ...

Examples

specific Embodiment approach 1

[0031] Specific implementation mode one: combine figure 1 , 2 , 4. An eccentric flank with unequal arc head milling cutter and grinding method, the cutter is of integral structure, and the cutter material is cemented carbide. The milling cutter includes a shank (1) and an arc head (2), the diameter of the shank is 8mm, the arc head includes a small curvature arc (2-2), the arc radius is 5mm, and a large curvature arc (2- 1), the arc radius is 1mm. The arcs at both ends are smoothly connected to form the arc head of the milling cutter. Effect: under the same pitch, increase the cutting bandwidth (d 2 >d 1 ), improved processing efficiency and improved processing quality (Δh 2 1 ).

specific Embodiment approach 2

[0032] Specific implementation mode two: combination figure 1 , 3 An eccentric flank with unequal distance arc head milling cutter and its grinding method, the included angle between (A-A) is 87°, the included angle between (B-B) is 93°, the helix angle (r) is 38°, and the helix angle (v) is 40°. Effect: It avoids the impact of different hardness of hardened steel splicing molds on the machining stability during the cutting process, reduces the tool vibration during the cutting process, and improves the tool life and the surface quality of the processed workpiece.

specific Embodiment approach 3

[0033] Specific implementation mode three: combination Figure 6 , 7 Disclosed is a milling cutter with an eccentric flank and an arc head with unequal distances and a grinding method thereof, wherein the end flank (6) and the peripheral flank (10) of the cutter are eccentric. Effect: It can protect the cutting edge, reduce tool wear and prolong tool life.

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