JPH0325846Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention relates to the improvement of cutting tools such as indexable bits and milling cutters. This has been improved so that the amount of protrusion or retraction can be adjusted accurately, firmly, and easily.

[Conventional technology]

Traditionally, cutting tools such as bits and milling cutters have been of the so-called throw-away type, in which the tip is fixed to the tip seat of the shank body with a pin, cam, or clamp, because the tip can be easily replaced. There is.

Further, as seen in Japanese Patent Publication No. 44-19075, an inclined surface 38b is formed on the side surface of the holding concrete 30 to which the chip 32 is fixed by a clamp 34, and a support having an inclined surface 38a corresponding to this surface 38b is provided. There is also a cutting tool in which the holding body 30 is adjusted in the radial direction of the tool by moving the body 37 in the axial direction of the tool by means of a screw 40.

Then, as in the tool disclosed in Japanese Utility Model Publication No. 56-57703, an adjustment shim 2 acting as a wedge is interposed on the side surface of the cartridge 5 to which the chip is fixed, and this shim is moved by the bolt 3. There is also a cutting tool in which the cartridge described above is adjusted in the radial direction of the tool.

[The problem that the idea attempts to solve]

However, although the throw-away type cutting tool mentioned earlier has the great advantage of making it easier to replace the tip, most of the time, if the tip is re-ground due to wear or damage, It cannot be placed on the shank body and reused. Therefore, when using a reground chip, there is a problem in that the shank body must be corrected or a new shank body must be made.

Further, in the device disclosed in Japanese Patent Publication No. 44-19075, a chip 32 is fixed to a holding member 30 by a clamp 34, and this holding member is attached to a support member 37.
Because it is fixed to the main body 31 with screws 36 through the It is used as a cutting tool for cutting.

The above can be said in common to the cutting tool disclosed in Japanese Utility Model Application Publication No. 56-57703.

[Purpose of invention]

The present invention was developed in view of the above-mentioned problems.The chip is attached directly to the shank body, greatly increasing the retention force of the chip to the shank body, and the occurrence of chattering is extremely small even when used for heavy cutting. Moreover, the chip in the shank body is intended to provide an indexable cutting tool that can easily adjust the position of the body in the axial and radial directions, improving workability and economy. .

[Means to solve the problem]

The present invention solves the above-mentioned problems by the means described below.

That is, a tip seat is provided at the end of the shank body, and has a side wall that is approximately parallel to the axis of the body, and an inclined wall that is formed at an angle of 5 to 85 degrees with respect to the axis. An adjustment member having an inclined surface formed at an angle of 1 to 15 degrees to prevent the tip from flying out in the direction, and a side surface corresponding to the side wall of the main body is fixed in the tip seat so as to be movable in the axial direction of the main body. By moving this adjustment member, the position of the chip can be adjusted in the radial and axial directions of the main body, and the chip is fixed by a fixing member using a bolt installed in the chip seat of the main body. The chip is fixed to the chip seat by pressing.

[Effect of invention]

As described above, in the present invention, since the chip is directly attached to the chip seat of the shank body, strong and stable chip retention and high tool accuracy can be obtained.

Moreover, since the adjusting member located in the tip seat of the main body can be adjusted using only a set screw, it can be easily and accurately moved to a desired position.
In addition, the engagement surface between the adjustment member and the tip is configured to pull the tip toward the axis of the tool, which prevents the tip from rattling or flying outward during cutting, thereby minimizing damage to the tool. Make it less.

Further, the tip in the tip seat of the main body can be adjusted to the radius of the tool by moving the above-mentioned adjustment member in the axial direction of the main body by engaging the inclined wall of the tip seat and the inclined side surface of the tip. It can be easily adjusted to the desired position in the directional and axial directions.

As a result of the above, even if the tool is used under heavy cutting conditions, damage to the tool is extremely small, and highly efficient and highly accurate cutting can be performed.

The inclined wall of the tip seat of the main body and the inclined side surface of the tip are preferably formed at an angle of 5 to 85 degrees with respect to the axis of the main body, and if this angle is less than 5 degrees, the amount of adjustment is extremely small. It's not efficient,
If it exceeds 85 degrees, the amount of adjustment in the radial direction of the tool will become large, and the amount of adjustment in the axial direction will become small, causing the adjustment amount to become unbalanced, which is not appropriate.

In addition, the angle between the sloped wall of the adjusting member and the side surface of the chip, which is formed primarily to prevent the chip from popping out of the tool, should be between 1 and 15 degrees; if this angle is less than 1 degree, it will be effective in preventing the chip from popping out. If the angle exceeds 15 degrees, the volume of the chip will decrease and the strength of the chip will decrease, which is not preferable.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

The figures show the end mill according to the present invention. Fig. 1 a is a front view of the end mill, Fig. 2 b is a side view showing the main parts of a, and Fig. 2 is a side view of the end mill with the fixing member of Fig. 1 a removed. FIG. 3 is an enlarged view of the main part in the state shown in FIG.

In the figure, a linear side wall 11 is formed at the end of the shank body 1 almost parallel to the axis O of the body.
and 5 to 85 degrees (preferably 10 to 85 degrees) with respect to the axis.
A chip seat 13 having an inclined wall 12 selected from a range of angles θ of 75 degrees (35 degrees in the embodiment) is provided on the chip 4 so as to form a predetermined rake angle.

In addition, a chip fixing member 5 is provided at the center of the chip seat.
a screw hole 14 into which a bolt 6 is screwed together;
A screw hole 15 is formed into which a set screw 3 for fixing the adjustment member is screwed.

The adjusting member 2 is fixed to the tip seat 13 of the main body by a set screw 3 so as to be movable in the axial direction of the tool. An angle θ of 1 to 15 degrees (preferably 1 to 10 degrees, 3 degrees in the example) with respect to a line drawn perpendicularly from the side surface 21 is formed on the end side of the
The inclined surface 2 on which the side surface 43 of the chip 4 which has
2, an elongated hole 23 is provided in the center at a position corresponding to the screw hole 14 of the main body to allow the adjustment member 2 to move freely in the axial direction of the tool, and one end is open on the other end side. An elongated hole 25 having a stepped portion 24 for locking the head of the set screw 3 is provided.

The chip 4 has a front cutting edge 41 and an outer cutting edge 42.
and a side surface 43 corresponding to the inclined surface 22 of the adjustment member described above, and an inclined wall 1 on the tip seat of the main body.
An inclined side surface 44 corresponding to No. 2 is provided.

When adjusting the tip 4 on the tip seat 13 of the shank body, first insert a measuring device such as a dial gauge on the outer cutting edge 42 side and the front cutting edge 41 side of the tip in the state shown in FIG. When the adjusting member 2 is brought into contact with the tip, and then the set screw 3 of the adjusting member 2 is loosened and the adjusting member is moved up and down along the linear side wall 11 of the chip seat, the tip is guided by the inclined wall 12 of the chip seat. The tool moves in the radial and axial directions as shown in FIG.

After obtaining the desired effective cutting diameter D or effective protrusion amount L as described above, adjust the adjustment member 2 with the set screw 3.
is fixed to the chip seat 13, and when the chip fixing member 5, which has a lower surface 51 that presses the upper surface 45 of the chip and a lower surface 52 that presses the upper surface 26 of the adjustment member, is tightened with the bolt 6, the chip is firmly fixed in the chip seat. Can be fixed to.

In addition, in order to facilitate the above explanation, FIG.
Although the tip fixing member 5 is shown removed, in actual work, the adjustment can be made without any problem even if the fixing member is attached to the main body.

Also, the above explanation uses an end mill as an example, but
The gist of the present invention can also be applied to indexable turning tools and drilling tools.

[Effect of idea]

As described above, the present invention has a structure in which the chip is directly attached to the chip seat of the shank body, and the chip is prevented from flying out of the tool, so the rigidity of the tool is greatly increased. At the same time, it provides strong and stable chip retention and extremely high tool accuracy, so it can be used for heavy cutting to obtain highly accurate machined surfaces.

In addition, adjustments to the tips can be made with very simple operations, and tips that have been reground due to wear or damage can be reused without the need to manufacture a new tool body. becomes.

Moreover, since the structure of the tool itself is simple, it is an indexable cutting tool that has the effect of greatly reducing tool cost and allows easy adjustment of the tool diameter.

[Brief explanation of drawings]

The figures show the end mill according to the present invention. Fig. 1 a is a front view of the end mill, Fig. 2 b is a side view showing the main parts of a, and Fig. 2 shows the fixing member of Fig. 1 a removed. FIG. 3 is an enlarged view of the main part in the state shown in FIG. 1... Shank body, 2... Adjustment member, 3...
Set screw, 4... Chip, 5... Chip fixing member, 6... Fixing member pressing bolt, 11... Straight side wall, 12... Inclined wall, 21... Straight side surface,
22... Inclined surface, 41... Front cutting edge, 42... Peripheral cutting edge, 43... Side surface, 44... Inclined side surface.

Claims (1)

[Scope of utility model registration request] A chip seat is provided at the end of the shank body, which has a side wall substantially parallel to the axis of the body and an inclined wall formed at an angle of 5 to 85 degrees with respect to the axis, so that the chips are scattered outward. An adjusting member having an inclined surface formed at an angle of 1 to 15 degrees to prevent this from occurring, and a side surface corresponding to the side wall of the main body is fixed to the tip seat so as to be movable in the axial direction of the main body, and the adjusting member A slow-a-way cutting tool characterized in that the position of the tip can be adjusted in the radial and axial directions of the main body by moving the tip.