Roughing End Mills
A technology of end mills and processing parts, which is applied in the direction of milling cutters, metal processing equipment, milling machine equipment, etc., and can solve problems such as easy defects, inability to obtain finish surface accuracy, and damage to the processing surface
Active Publication Date: 2017-07-21
MITSUBISHI MATERIALS CORP
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Problems solved by technology
[0006] However, in the rough machining end mill described in Patent Document 1, the wavy concave-convex portion of the peripheral cutting edge intersects the convexly curved corner cutting edge to form a sharp corner at the point of intersection. , especially prone to defects during rough machining
Even in the final finish machining, there is a possibility that the machined surface may be damaged due to this corner, and good finish surface accuracy may not be obtained
Method used
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Embodiment
[0050] Next, regarding the length L in the direction of the axis O of the straight portion 10 of the peripheral cutting edge 5 described in the above embodiment, an example will be given to describe the effect thereof. In this example, according to the first embodiment of the present invention, the length L of the linear portion 10 of the peripheral cutting edge 5 in the direction of the axis O is set to be different from the rough machining end mills of the example and the comparative example. In the above-mentioned cutting test of forming a cup-shaped concave portion in a mold, the presence or absence of damage of the roughing end mill and the roughness of the finishing surface were measured. In the rough machining end mills used in the present embodiment and the comparative example, as a common specification, the outer diameter of the peripheral cutting edge 5 is 10mm, the number of cutting edges is four pieces, the twisting angle is equal to the twisting angle of 45°, and t...
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In the rough machining end mill of the present invention, a plurality of corner cutting edges (8) and peripheral cutting edges (5) are formed on the outer periphery of the front end portion of the end mill body. Among the peripheral cutting edges, the peripheral cutting edges (5) adjacent in the circumferential direction are The corrugated rough processing part (9) is formed in such a manner that the phases of the rough processing parts (9) are shifted from each other, and the convex part (9A) at the front end of the rough processing part (9) in the outer peripheral cutting edge (5) is For the outer peripheral cutting edge (5) located at the front end side, the radial apex (9C) of the frontmost convex portion (9A) coincides with the radial apex (8A) of the corner cutting edge (8), or viewed from the direction of rotation of the end mill When the linear portion (10) extending linearly is connected to the radial apex (8A) of the corner cutting edge (8), in the other peripheral cutting edge (5), the frontmost convex portion (9A) of the rough machining portion (9) The radial vertex (9C) of the radial vertex (9C) is connected to the radial vertex (8A) of the corner edge (8) by a straight line portion ( 10 ) extending linearly when viewed from the direction of rotation of the end mill.
Description
technical field [0001] The present invention relates to a rough machining end mill in which a rough machining portion having a wave-like roughness is formed on an outer peripheral cutting edge formed on the outer periphery of a front end portion of an end mill main body that rotates around an axis. [0002] This application claims priority based on Patent Application No. 2013-233970 for which it applied in Japan on November 12, 2013, and uses the content here. Background technique [0003] As such a roughing end mill, for example, Patent Document 1 proposes a technique in which a bottom edge extending from the axis side toward the outer peripheral side is formed at the front end of an end mill body rotating around an axis, and The outer periphery of the front end portion of the end mill is formed with a wavy concave-convex outer peripheral edge extending to the rear end side when viewed from the end mill rotation direction. It is a corner edge that is convex on the outer pe...
Claims
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IPC IPC(8): B23C5/10
CPCB23C2210/088B23C2210/203B23C2210/486B23C2220/60B23C5/003B23C2210/202B23C5/10B23C2210/0414
Inventor 深田耕司
Owner MITSUBISHI MATERIALS CORP