Cbn blade excellent in finished surface roughness
A profile and flank technology, applied in metal processing equipment, cutting tools for lathes, manufacturing tools, etc., can solve the problem of inability to maintain the accuracy of the finished surface, the inability to finish the surface roughness, and the inability to maintain the accuracy of the surface roughness, etc. Problems, achieve the effect of inhibiting the peeling of the coating, inhibiting the peeling of the coating, and preventing the peeling of the coating
Active Publication Date: 2012-10-03
MITSUBISHI MATERIALS CORP
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Problems solved by technology
[0007] However, when the above-mentioned conventional insert is used for finish cutting, for example, when the conventional insert 1 is used for finish cutting of a high-hardness workpiece, the TiN coating is peeled off during cutting, so There is a problem that the effect of suppressing welding cannot be sustained, and sufficient precision of the finished surface cannot be maintained during long-term use
In addition, when the conventional insert 2 is used for finishing machining of a high-hardness workpiece, the accuracy of the surface roughness cannot be maintained when chipping occurs on the flank surface, and if a wavy shape is formed on the cutting edge, the accuracy of the surface roughness cannot be maintained. Finishing according to the desired surface roughness
Method used
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Embodiment
[0052] Examples are shown in Table 3. The preparation method of the sample of the example is shown below.
[0053] 1. Fabrication of tool base
[0054] (1-1) Cubic boron nitride raw material powder, titanium nitride powder, and alumina powder with an average particle diameter of 8 μm or less are prepared as raw material powders, and these raw material powders are mixed according to the proportions in Table 1 , respectively using acetone and performing wet mixing with a ball mill for 24 hours.
[0055] (1-2) After drying the prepared mixed powder, mold it with a hydraulic punching machine at a molding pressure of 1 MPa.
[0056] (1-3) The molded body was heat-treated in vacuum at 1 Pa, 1000° C., and 30 minutes to remove volatile components and components adsorbed on the powder surface.
[0057] (1-4) The molded body and the cemented carbide base material are laminated, and a CBN sintered body is obtained by ultra-high pressure and high temperature treatment typically at a pr...
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Abstract
The present invention provides a CBN blade excellent in finished surface roughness. Excellent finished surface precision can be kept and excellent wear-resistant performances can be developed. The CBN blade with a groove and a covering film formed on a rear blade surface is characterized in that, first, the shape of the groove which is provided with the covering film, when observing the profile of the groove provided with concave and convex, the groove width is 1 to 25um, the platform width is 3 to 25um, the height from the surface to the lowest position of the groove is 1.5 to 15um, when a combination of the platform and the groove is a period, the groove shape is formed by more than two periods; second, the forming area of the groove inside the rear blade surface is the scope extending 5 to 300um from an intersection line o the beveling honing surface and the rear blade surface to the rear blade surface side; and third, concerning about the direction forming the groove, an inclined angel(with a direction opposite to the blade front end) formed by a line parallel with the blade ridge and the groove forming direction is larger than / equal to 10 degrees or smaller than / equal to 10 degrees.
Description
technical field [0001] The present invention relates to a CBN blade with CBN (cubic boron nitride) as the main component and formed by sintering it under ultra-high pressure and high temperature. In the finishing machining of high-hardness steel or non-ferrous metal materials such as Al alloys and Cu alloys, CBN inserts can suppress boundary wear and maintain excellent finishing surface accuracy during long-term use. Background technique [0002] Conventionally, a cubic boron nitride (hereinafter referred to as "CBN")-based sintered body or the like has been used as an insert for finishing machining, but various methods have been proposed for the purpose of improving the precision of the finished surface of the workpiece in finishing machining. Program. [0003] For example, as shown in Patent Document 1, a cutting tool in which a TiN coating is formed on the surface (especially the rake face) of a cutting tool made of a CBN-based sintered body (referred to as "conventional...
Claims
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IPC IPC(8): B23B27/14B23P15/28C23C14/06
Inventor 矢野雅大大桥忠一宫下庸介田岛逸郎
Owner MITSUBISHI MATERIALS CORP