JP5383367B2 - Throwaway tip - Google Patents

Description

  The present invention relates to a throw-away tip having a coating layer formed on the surface of a substrate.

  Conventionally, a throw-away tip in which a surface of a substrate is coated with a coating layer is known, and various appearances of the coating layer have been studied. For example, in Patent Document 1, when a coating layer is formed by chemical vapor deposition, a substrate setting jig is devised to form a coating layer on which a contact mark without a coating layer is not formed. It is disclosed that it can be made beautiful.

  Patent Document 2 discloses that the use state display layer is formed except for only the corner portion, whereby it is difficult to weld and the use corner can be identified. And in patent document 3, after forming a coating layer on the surface of a base | substrate, a hard coating layer residual stress reduction pattern, such as a single basic shape mark, is formed by irradiating a laser beam on a rake surface or a flank. It is described that the chipping resistance is improved by reducing the tensile residual stress in the layer. Further, Patent Document 4 discloses that identification information indicating the dimensional tolerance of the corner height of the cutting edge is imprinted on the surface of the chip by a method such as printing, electric contact, or laser.

JP-T 09-510507 WO2007-013392 JP 2007-237307 A Japanese Patent Laid-Open No. 2005-212040

  However, in the coating layer having no contact mark as in Patent Document 1, since the cutting edge corner cannot be identified, there is an operation error such as disposal of unused cutting edge corners even though there are cutting edge corners not yet used. Could occur. Further, in any of Patent Documents 2 to 4, there is a problem in that since the identification mark is separately formed, the number of processes increases and the cost increases.

  An object of the present invention is to provide a throw-away tip that improves the above-described conventional problems and can easily form a corner identification mark.

The throw-away tip of the present invention can be attached to and detached from the tool body, has a plurality of corner cutting edges, covers the surface of the base, and covers the rake face or the seating face away from the cutting edge. A mark capable of corner identification is formed by not forming at least the lower layer of the covering layer or the outermost layer distinguishable from the substrate, and the mark is formed when the covering layer is covered. It is the contact trace made by the holder holding the said base | substrate .

  In addition, the throwaway tip has a substantially plate shape with a principal surface formed with a plurality of corner cutting edges on both principal surfaces, and can be used with the rake surface and the seating surface reversed. It is a throw-away tip, and it is preferable that the mark is different on each main surface.

Further, when the substrate is made of silver, it is desirable that the outermost layer is made of any one of a TiN layer, a TiCN layer, and an Al ₂ O ₃ layer.

  According to the throw-away tip of the present invention, it is possible to identify a cutting edge corner without taking extra time for printing or engraving. In particular, the shape of the contact mark formed by the contact of the holder that holds the substrate when coating the coating layer is devised to provide a corner-identifiable mark, so that the corner can be easily added without adding a process. An identifiable mark can be produced.

  In addition, the throw-away tip has a substantially plate shape with a polygonal main surface, and the plurality of corner cutting edges are formed on both main surfaces, and can be used with the rake surface and seating surface reversed. In the case of the throw-away tip, it is desirable that the marks are different on each main surface from the viewpoint of easier corner identification.

Furthermore, when the substrate is made of a silver color like a metal or a sintered alloy such as cemented carbide or cermet, the TiN layer (gold), TiCN layer (brown), and Al ₂ O ₃ layer (black) are visually visible. It is most suitable as the outermost layer that can be discriminated.

It is (a) schematic perspective view and (b) sectional drawing which show an example of the throw away tip of this invention. FIG. 2 is a plan view of the throw-away tip in FIG. 1 (an example of a mark shape on each main surface). FIG. 2 is a schematic diagram illustrating an example of a substrate setting method in a coating layer forming step in the manufacture of the throw-away chip in FIG. 1.

  FIG. 1A is a schematic perspective view and FIG. 1B is a cross-sectional view of an example of a throw-away tip that is a preferred example of a cutting tool of the present invention, and FIG. This will be described with reference to FIG.

  A throw-away tip (hereinafter simply abbreviated as a tip) 1 of the present invention can be attached to and detached from a tool body (not shown), and a plurality of corner cutting edges 2 are formed as shown in FIG. As shown in FIG. 1B, the surface of the substrate 10 is covered with a coating layer 11.

  The outermost layer of the coating layer 11 that is at least visually distinguishable from the base body 10 or the lower layer (the coating layer 11 other than the outermost layer 12) at a portion of the rake face 3 or the seating surface 4 away from the cutting edge ridge line 5. The mark 7 that can identify the corner cutting edge 2 is formed because the film 12 is not formed. That is, the mark 7 has a different shape for each corner. This makes it possible to identify the corner cutting edge 2 without taking extra time for printing or engraving.

  Here, according to FIGS. 1 and 2, the chip 1 has a substantially plate shape whose principal surfaces (rake surface 3 and seating surface 4) are polygonal, and a plurality of corner cutting edges 2 are formed on each principal surface. In the case of a negative type throw-away tip that can be used by inverting the rake face 3 and the seating face 4, the mark 7 is different on each main face (the rake face 3 and the seating face 4). It is desirable in that identification becomes easier. The side surface of the chip 1 constitutes a flank 6.

  1 and 2 is provided with a screw hole 8 penetrating over the seating surface 4 at the center of the rake face 3.

  Here, according to the present invention, in order to form the mark 7 as described above, as shown in a schematic diagram showing an example of a method of setting the substrate 10 in the film forming process of the coating layer 11 in FIG. By devising the shape of the contact trace formed by contact with the holders (sample setting jigs 20 and 30 described later) that hold the base 10 when the substrate 11 is coated, the mark 7 can be identified by corners. Thus, the mark 7 capable of easily identifying the corner can be produced without adding a process. In addition, although the coating layer 11 other than the outermost layer 12 may be formed in the mark 7 portion, the base 10 may be exposed.

The covering layer 11 is made of at least one kind of carbide, nitride, carbonitride, diamond, diamond-like carbon (DLC), boron nitride (selected from the group of periodic table 4, 5, 6 metal, Al and Si. cBN). Here, when the substrate 10 is made of a silver color such as a metal or a sintered alloy such as cemented carbide or cermet, the outermost layer of the coating layer 11 is a TiN layer (gold), a TiCN layer (brown), Al _2. be composed of O ₃ layer (black) is visually optimized in terms identifiable. In addition, the outermost layer 12 does not necessarily need to be disposed on the surface of the corner cutting edge 2, and the outermost layer 12 may be removed and the covering layer 11 other than the outermost layer 12 may be exposed.

  The coating layer 11 can be suitably formed by chemical vapor deposition (CVD) or physical vapor deposition (PVD). An example of a specific substrate setting method will be described. When a substrate 10 having a screw hole 8 is set as in the chip 1 of FIGS. 1 and 2, a sample in a CVD film forming apparatus (not shown) is used. The shape of the setting jig 20 is as shown in FIG. That is, the setting jig 20 includes a support plate 21, a base portion 22, a sample lower surface contact portion 23, a sample hole portion penetrating protrusion 24, and a sample upper surface contact portion 25.

  And it inserts so that the screw hole 8 of the base | substrate 10 may pass through the sample hole part penetration protrusion part 24 of the sample setting jig | tool 20, and the lower surface 13 of the base | substrate 10 is made to contact the sample lower surface contact part 23. FIG. Then, the base 10 is fixed by inserting the top surface contact portion 25 of the sample into the through-hole projecting portion 24 of the sample hole and contacting the top surface 14 of the base 10. The chip 1 can be manufactured by setting this in a film forming apparatus and forming the coating layer 11. Note that the base portion 22 may have the same cross-sectional shape as the sample lower surface contact portion 23. In addition, the sample upper surface contact portion 25 can be omitted, or a structure that appears in a knock type can be used.

  When setting the substrate 17 having no screw hole 8, the sample setting jig 30 includes a support plate 21, a base 32, a sample lower surface contact portion 33, and a sample upper surface contact portion 35.

  Then, the substrate 17 is placed on the sample lower surface contact portion 33 of the sample setting jig 30, and the sample upper surface contact portion 35 is brought into contact with the upper surface 14 of the substrate 17, thereby fixing the substrate 10. A chip can be manufactured by setting this in a film forming apparatus and forming the coating layer 11. Note that the base portion 32 may have the same cross-sectional shape as the sample lower surface contact portion 33. Further, according to FIG. 3B, the sample upper surface contact portion 35 is fixed to the support plate 21 by the connecting portion 36.

1 Throw away tip (chip)
2 Corner cutting edge 3 Rake face 4 Seating face 5 Cutting edge ridge line 6 Relief face 7 Mark 8 Screw hole 10, 17 Base 11 Covering layer 12 Outermost layer 13 Lower face 14 Upper face 20, 30 Sample setting jig 21 Support plate 22, 32 Base 23, 33 Sample bottom surface contact portion 24 Sample hole portion penetrating protrusions 25, 35 Sample top surface contact portion 36 Connecting portion

Claims (3)

The tool body is detachable, a plurality of corner cutting edges are formed, the surface of the base is covered with a coating layer, and at least a visual portion of the coating layer is formed on a part of the rake face or the seating face away from the cutting edge ridge line. In addition, a mark that can be identified by a corner is formed because the lower layer or the outermost layer that can be distinguished from the substrate is not formed , and the mark holds the substrate when covering the coating layer. A throw-away tip that is a contact mark made by the holder that touches . The throw-away tip has a substantially plate-shaped main surface, and the plurality of corner cutting edges are formed on both main surfaces. The throw-away tip can be used by inverting the rake surface and the seating surface. a chip, throw-away tip of claim 1, wherein the mark is different in each main surface. The throw-away tip according to claim 1 or 2 , wherein the substrate is made of silver and the outermost layer is made of any one of a TiN layer, a TiCN layer, and an Al ₂ O ₃ layer.

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