JP2013173197A - Throw-away type tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To elongate a life of a body of a throw-away type tool by avoiding the damage of an external peripheral chip pocket, and to reduce cost and a time.SOLUTION: A throw-away type tool 31 comprises a chip pocket insertion part 11 having a recess 12 in a position of an external peripheral chip pocket and a recess 14 at a side opposite to a side-face chip pocket, and a detachable external periphery chip pocket part 1 which has an external peripheral chip pocket 2 and is detachably fit to the recesses 12, 14 of the chip pocket insertion part 11. In the chip pocket insertion part 11, there is formed a bolt hole 13 at a side opposite to the side-face chip pocket 19, and in the detachable external peripheral chip pocket part 1, there is formed a hole 3 having a diameter not smaller than a diameter of the bolt hole 13 in a position in which the bolt hole 13 can be seen from the outside when the detachable external periphery chip pocket part 1 is fit to the chip pocket insertion part 11, thus elongating a life of a body of the throw-away type tool 31 by avoiding the damage of the external peripheral chip pocket 2, and reducing cost and a time.

Description

  The present invention relates to a throw-away tool for machining gears.

  In a conventional throw-away tool for machining gears, a tip pocket for discharging chips (chips) is formed in front of the carbide insert.

  FIG. 4 (a) is a schematic view of a conventional throw-away tool, and FIG. 4 (b) is a DD arrow view of (a). The conventional throw-away tool 21 shown includes an outer peripheral tip pocket 22, a carbide insert 27, back metals 26 and 28, and side tip pockets 29 (however, the throw-away tool 21 is shown in the figure. Part).

  The above-described cemented carbide insert 27 is a throw-away insert using a cemented carbide.

  The above-described back metals 26 and 28 are for preventing damage to the body of the throw-away tool 21 when the carbide insert 27 is missing.

  The outer peripheral chip pocket 22 and the side surface chip pocket 29 described above are for discharging chips that come out when the object is cut with the carbide insert 27.

  The conventional throw-away tool 21 is configured as described above, and cuts the object with the carbide insert 27 while rotating in the direction of the dotted arrow in FIG. The chip by the carbide insert 27 is discharged from the outer chip pocket 22 and the side chip pocket 29.

  Incidentally, Patent Document 1 proposes a method for preventing chip adhesion to the blade and improving chip discharge by applying a DLC (Diamond Like Carbon) coating with a low friction coefficient to the blade. ing.

JP 2009-066715 A

  In the above throwaway type tool, if the cutting speed or the feeding speed is high, the outer peripheral chip pocket is damaged.

  If the outer peripheral tip pocket is damaged, it is necessary to replace the throw-away tool itself, which is costly and troublesome.

  Therefore, an object of the present invention is to solve the above-mentioned problems by making the outer peripheral chip pocket removable.

The throw-away tool according to the first invention for solving the above-mentioned problems is
From the opposite side of the side chip pocket, across the outer peripheral surface in the rotational direction of the throw-away insert, the chip pocket insertion part having a recess,
It has an outer peripheral chip pocket, and is provided with a detachable outer peripheral chip pocket portion that is detachably fitted in the recess of the chip pocket insertion portion.

The throw-away tool according to the second invention for solving the above-mentioned problem is
In the throw-away tool according to the first invention,
The chip pocket insertion portion is provided with a bolt hole on the opposite side of the side chip pocket,
The removable outer peripheral chip pocket portion has a diameter equal to or larger than the diameter of the bolt hole at a position where the bolt hole can be seen from the outside when the removable outer peripheral chip pocket portion is fitted into the chip pocket insertion portion. Holes are provided,
The chip pocket insertion portion and the detachable outer peripheral chip pocket portion are fixed by passing a bolt through the hole and screwing it into the bolt hole.

  According to the throw-away tool according to the first aspect of the present invention, when the outer peripheral chip pocket is damaged, the outer peripheral chip pocket can be replaced when the outer peripheral chip pocket is damaged. Since the life of the throwaway tool body can be improved, costs and time can be reduced.

  According to the throw-away tool according to the second aspect of the invention, it is possible to fix the tip pocket insertion portion and the detachable outer periphery tip pocket portion with a bolt, and to the surface other than the outer periphery tip pocket or the side surface tip pocket. By providing the bolt hole and the hole, it is possible to prevent the chip from entering the bolt hole or the hole during cutting.

It is the schematic of the detachable outer periphery chip | tip pocket part of the throw away type tool which concerns on Example 1 of this invention. (A) is an AA arrow view in (b) or (c), (b) is an BB arrow view in (a) or (c), and (c) is in (a) or (b). CC views are shown respectively. It is the schematic which looked at the tip pocket insertion part of the throw away type tool which concerns on Example 1 of this invention from the opposite side of the side surface tip pocket. It is the schematic explaining the state by which the detachable outer periphery chip pocket part was fitted by the chip pocket insertion part of the throw away type tool which concerns on Example 1 of this invention. (A) is the figure seen from the opposite side of a side chip pocket, (b) is the figure seen from the side chip pocket side. It is the schematic of the conventional throwaway type tool. (A) is the figure seen from the side chip pocket side, (b) is a DD arrow line view in (a).

  Hereinafter, the throw-away tool according to the present invention will be described with reference to the drawings in the embodiments.

  A throw-away tool according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. First, as shown in FIG. 3A, the throw-away tool 31 according to the first embodiment of the present invention includes a detachable outer peripheral tip pocket portion 1 and a tip pocket insertion portion 11.

  As shown in FIG. 2, the chip pocket insertion portion 11 described above has a recess 12 at the position of the outer periphery chip pocket, a bolt hole 13, and a recess 14 on the opposite side of the side surface chip pocket.

  The carbide inserts 15 and 17 and the back metal 16 are the same as those in the prior art. Note that a part of the chip pocket insertion portion 11 is shown. For example, although not shown in FIG. 2, the back metal 18 and the side chip pocket 19 are shown in FIG.

  The recess 12 in the outer peripheral tip pocket and the recess 14 on the opposite side of the side tip pocket are the outer peripheral surface in the rotational direction of the throwaway insert from the opposite side of the side tip pocket 19 (the outer peripheral tip in the conventional throwaway tool 21). It shows that the outer peripheral chip pocket is not provided in the chip pocket insertion portion 11.

  The above-described bolt hole 13 is provided on the opposite side of the side surface chip pocket 19.

  The above-described carbide inserts 15 and 17, back metals 16 and 18, and side chip pockets 19 are the same as the carbide inserts 27, back metals 26 and 28 and side chip pockets 29 of the conventional throw-away tool 21, Description is omitted.

  Schematic diagrams of the above-described removable outer peripheral chip pocket portion 1 are shown in FIGS. 1 (a), 1 (b), and 1 (c). (A) is an AA arrow view in (b) or (c), (b) is an BB arrow view in (a) or (c), and (c) is in (a) or (b). CC views are shown respectively. As shown in these drawings, the removable outer peripheral chip pocket portion 1 includes an outer peripheral chip pocket 2 and a hole 3.

  Further, the detachable outer peripheral chip pocket portion 1 has recesses 12 and 14 in the chip pocket insertion portion 11 so that the outer peripheral chip pocket 2 comes at the position and angle of the outer peripheral chip pocket 22 in the conventional throw-away tool 21 (FIG. 2). (Refer to Fig. 1).

  Further, the above-described hole 3 has a diameter equal to or larger than the diameter of the bolt hole 13 and is provided at a position where the bolt hole 13 can be seen from the outside when the removable outer periphery chip pocket portion 1 is fitted to the chip pocket insertion portion 11. ing.

  The outer peripheral chip pocket 2 described above is for discharging a chip that comes out when an object is cut by the carbide insert 17 of the chip pocket insertion portion 11.

  FIGS. 3A and 3B are schematic views for explaining a state in which the removable outer peripheral tip pocket portion 1 of the throw-away tool 31 is fitted to the tip pocket insertion portion 11. (A) is the figure seen from the side chip pocket 19 opposite side, (b) is the figure seen from the side chip pocket 19 side. In this way, the detachable outer peripheral chip pocket portion 1 is fitted into the chip pocket inserting portion 11, and the bolt 20 is passed through the hole 3 and screwed into the bolt hole 13, whereby the chip pocket inserting portion 11 and the detachable outer peripheral tip are inserted. The pocket portion 1 can be fixed.

  Furthermore, by providing the bolt hole 13 and the hole 3 on the surface other than the outer peripheral chip pocket 2 or the side surface chip pocket 19 as described above, it is possible to prevent the chips from entering the bolt hole 13 or the hole 3 during cutting.

  By adopting the configuration as described above, the throw-away type 31 according to the first embodiment of the present invention has the detachable outer peripheral chip pocket portion 1 as the chip pocket insertion portion 11 as shown in FIGS. The object is cut by the carbide inserts 15 and 17 while being fitted and fixed by the bolt 20 and rotating in the direction of the dotted arrow.

  Chips resulting from the cutting of the carbide insert 17 are discharged from the outer chip pocket 2 and the side chip pocket 19, but when the outer chip pocket 2 is damaged by cutting, the removable outer chip chip 1 can be replaced with a new one. it can.

  Further, in order to suppress damage to the removable outer peripheral chip pocket portion 1, the removable outer peripheral chip pocket portion 1 may be subjected to DLC coating having a low friction coefficient.

  That is, the throw-away tool according to the first embodiment of the present invention can replace only the detachable outer peripheral chip pocket when the outer peripheral chip pocket is damaged by making the outer peripheral chip pocket severely damaged. In addition, since the life of the throw-away tool body can be improved, costs and time can be reduced.

  In addition, in the throw away type tool which concerns on Example 1 of this invention, although the carbide insert is used, of course, the throw away insert used for this invention is not limited to this.

  The present invention is suitable as a throw-away tool for machining gears.

DESCRIPTION OF SYMBOLS 1 Removable outer periphery chip pocket part 2,22 Outer periphery chip pocket 3 Hole 11 Chip pocket insertion part 12 Indentation 13 of outer periphery chip pocket position Bolt hole 14 Indentation 15, 17, 27 of the side opposite to a side chip pocket , 26, 28 Back metal 19, 29 Side chip pocket 20 Bolt 21 Conventional throw-away tool 31 Throw-away tool according to Embodiment 1 of the present invention

Claims (2)

From the opposite side of the side chip pocket, across the outer peripheral surface in the rotational direction of the throw-away insert, the chip pocket insertion part having a recess,
A throw-away tool comprising an outer peripheral tip pocket, and a removable outer peripheral tip pocket portion that is detachably fitted into the recess of the tip pocket insertion portion. The chip pocket insertion portion is provided with a bolt hole on the opposite side of the side chip pocket,
The removable outer peripheral chip pocket portion has a diameter equal to or larger than the diameter of the bolt hole at a position where the bolt hole can be seen from the outside when the removable outer peripheral chip pocket portion is fitted into the chip pocket insertion portion. Holes are provided,
The throw-away tool according to claim 1, wherein the tip pocket insertion portion and the detachable outer peripheral tip pocket portion are fixed by passing a bolt through the hole and screwing the bolt into the bolt hole.