KR200488938Y1 - Vibration Prevention Drill - Google Patents

Abstract

The present invention relates to a drill body (11); A cutting portion provided at a tip of the drill body; And a plurality of vibration preventing portions provided at the rear of the cutting portion, wherein the plurality of vibration preventing portions are disposed symmetrically with respect to the longitudinal axis of the drill body (11).

Description

[0001] Vibration Prevention Drill [

The present invention relates to an anti-vibration drill.

The drill is mainly a tool used to make a round hole or drive stator, fixed by a chuck depending on the application, and fitted to a bit or a driver.

Some electric drills include a hammer function, and drills vary greatly in speed, power and size.

Drills are commonly used for woodworking, metalworking, machine tool making, construction and utility projects, and specially designed versions are tailored for medicinal, space and miniature applications.

Figures 1a and 1b show the insert drill 10 machining the workpiece 20.

 1A shows an example in which an inner insert 12a for processing the inside of the processing hole 21 of the workpiece 20 is fixed to the body 11 by the inner insert cartridge 13a and a chip processed by the inner insert 12a, (14a). ≪ / RTI >

1B is an illustration showing an example in which the outer insert 12a for machining the outside of the machining hole 21 of the workpiece 20 is rotated by 180 degrees in the state of FIG. 1A is fixed to the body 11 by the outer insert cartridge 13b, And a chip processed by the chip 12a is discharged by the flute 14b.

As can be seen in FIGS. 1A and 1B, in the insert drill, the inner insert 2a and the outer insert 2b, which process the material, are made asymmetrical so that more resistance is generated in the outer insert, If it is not enough, there is a problem that the drill body vibrates due to the elasticity of the drill body and the insert is broken due to the vibration.

For this reason, it is not possible to process the hole 7D at a maximum depth (hole depth relative to the drill outer diameter), and when the tip of the end of the outer insert 12b is broken, the hole 21 to be machined can be reduced.

 If the tip end of the outer insert 12b is broken and the size of the hole to be machined becomes small, the drill body can be stuck in the machining hole and stuck in the hole. If the drill is stuck in the hole, the drill can not be taken out. May occur.

In order to alleviate the vibration due to the lateral asymmetry, the shape of the drill insert is made into a wave shape so as to balance the left and right workings, or the pilot drill is inserted in the middle of the insert (reference numeral 15 in FIG. There is an attempt to suppress vibration.

However, when the insert model is modified, the vibration generation is reduced, but the pilot drill itself can not be completely restrained.

Published Patent No. 10-2010-0055971 (May 28, 2010) Published Patent No. 10-2010-0091000 (Aug. 18, 2010)

In the present invention, a vibration preventing portion in the form of an insert which rotates in contact with the inner surface of the hole to be machined is further provided on the drill body to suppress the occurrence of vibration during drilling.

Further, in the present invention, a guide of a carbide material which is in contact with the inner surface of the hole to be machined and rotates is further mounted on the drill body or the connection ring to suppress the generation of vibration.

The present invention relates to a drill body (11); A cutting portion provided at a tip of the drill body; And a plurality of vibration preventing portions provided at the rear of the cutting portion, wherein the plurality of vibration preventing portions are disposed symmetrically with respect to the longitudinal axis of the drill body (11).

In the present invention, the cutting portion includes an inner insert 12a for machining the inside of the hole in drilling operation and an outer insert 12b for machining the outside of the hole, and the plurality of vibration preventing portions include first and second vibration preventing portions The first vibration preventing portion 17a may be disposed behind the inner insert 12a and the second vibration preventing portion 17b may be disposed behind the outer insert 12b.

In the present invention, one side of the first and second anti-vibration parts 17a and 17b may be in contact with the inner surface 201a of the hole to be machined during drilling.

In the present invention, the first and second vibration preventing portions 17a and 17b are processing inserts,

The inner surface can be cut by the first and second vibration preventing portions at a portion contacting the inner surface 201a.

The present invention may further include a plurality of anti-vibration guides 41 and 42 installed on the body 11, and the plurality of anti-vibration guides may be disposed symmetrically with respect to the longitudinal axis of the drill.

An extension bar 30 for extending the drill in the longitudinal direction, a connection ring 20 for connecting the body 11 and the extension bar 30, and a plurality of vibrations And a plurality of anti-vibration guides provided on the connection ring may be arranged in a symmetrical state with respect to the longitudinal axis of the drill.

In the present invention, the plurality of anti-vibration guides provided on the connection ring include a contact body formed on an outer end of the guide body and the guide body, the guide body being fixed to the connection ring, And may have an outer surface in contact with the outer surface 201a.

The present invention also relates to a drill body 11; A cutting portion provided at a tip of the drill body; And a plurality of anti-vibration guides installed on the drill body, wherein the plurality of anti-vibration guides are disposed in a state of being symmetrical with respect to a longitudinal axis of the drill.

The material of the plurality of anti-vibration guides installed in the body and / or the connecting ring may be carbide.

The present invention also relates to a drill body 11; A cutting portion formed at the tip of the drill body; An extension bar (30) for extending the drill in the longitudinal direction; A connection ring (20) for connecting the body (11) and the extension bar (30); And a plurality of anti-vibration guides provided on the connection ring (20), wherein the plurality of anti-vibration guides are disposed in a state of being symmetrical with respect to a longitudinal axis of the drill.

In the present invention, the plurality of anti-vibration guides provided on the drill body and / or the connecting ring include a contact surface formed on the outer end of the guide body and the guide body, the guide body being fixed to the connection ring, And an outer surface in contact with the inner surface 201a of the hole to be formed.

In the present invention, the vibration preventing portion is additionally provided in the drill body, so that the occurrence of vibration during drilling can be suppressed.

In addition, in the present invention, a guide of a carbide material may be additionally mounted on the drill body and / or the connection ring to suppress the occurrence of vibration during drilling operation.

1A is a plan view of a conventional insert drill.
FIG. 1B is a view in which FIG. 1A is rotated 180 degrees.
2A is a plan view of a drill added with a vibration preventing portion 17a, which is a feature of the present invention.
FIG. 2B is a view in which FIG. 2A is rotated 180 degrees.
Figure 3a is a perspective view of yet another type of conventional drill.
FIG. 3B is a plan view of the 3a drill, and FIG. 3C is a view of FIG. 3B rotated 180 degrees.
FIG. 4A is a perspective view of a drill applying the features of the present invention to the conventional drill of FIG. 3A; FIG.
FIG. 4B is a plan view of the drill of FIG. 4A, and FIG. 4C is a view of rotating the FIG.
FIG. 5A is a plan view of another conventional drill and FIG. 5B is a view of FIG. 5A rotated 180 degrees.
Figures 6a and 6b are views of a drill applying the features of the present invention to the conventional drill of Figures 5a and 5b.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

FIG. 1A is a plan view of a conventional insert drill, and FIG. 1B is a view in which FIG. 1A is rotated 180 degrees.

The drill 100 includes a body 11 and an inner insert 12a and an outer insert 12b, which are cutting portions for forming a machining hole 201 in the work 200, are provided at the end of the body.

 By means of the drilling operation, the chips of the material formed by the inner insert 12a and the outer insert 12b are discharged through the flutes 14a and 14b.

The inner insert 12a is mounted on the inner insert cartridge 13a and fixed to the body 11 and likewise the outer insert 12b is mounted on the outer insert cartridge 13b and fixed to the body 11. [

In the conventional drill 100 shown in FIGS. 1A and 1B, the inner insert 12a and the outer insert 12b are installed asymmetrically with respect to the drill center axis passing through the body, particularly the drill center, Occurs.

FIGS. 2A and 2B are views of a drill added with anti-vibration parts 17a and 17b, which are features of the present invention, and FIG. 2B is a view in which FIG.

As shown in Figs. 2A and 2B, the first and second vibration preventing portions 17a and 17b are provided behind the inner insert 12a and the outer insert 12b, respectively, One side portions 17aa and 17ba of each of the portions 17a and 17b are brought into contact with the inner surface 201a of the machining hole at the time of drilling.

The first and second vibration preventing portions 17a and 17b are provided symmetrically with respect to a shaft (drill center shaft) passing through the drill body. The first and second vibration preventing portions 17a and 17b The inner insert 12a and the first anti-vibration portion 17a coexist in a plane parallel to the drill center axis, and the inner insert 12a and the first anti-vibration portion 17a are also located on the outer insert 12b, And the second vibration preventing portion 17b coexist in a plane parallel to the drill center axis.

During drilling, the inner insert 12a and the outer insert 12b form the machining hole 201 and the drill proceeds, and the first and second vibrations (not shown) provided on the rear side of the inner insert 12a and the outer insert 12b The side portions of the preventing portions 17a and 17b are allowed to proceed in parallel contact with the inner surface 201a of the formed hole 201 and reduce the vibration generated in the drill during drilling.

The first and second vibration preventing portions 17a and 17b are in the form of a machining insert and the side portions 17a and 17b which are in contact with the inner surface 201a in parallel strike the inner surface 201, You can proceed.

FIG. 3A is a perspective view of another conventional drill, FIG. 3B is a plan view of the 3a drill, and FIG. 3C is a view of FIG. 3B rotated 180 degrees.

The drill 100 of FIGS. 3A to 3C further includes an extension bar 30 and a ring 20 connecting the body 11 and the extension bar 11. As shown in FIG.

4A to 4C, the conventional drill of FIG. 3A further includes anti-vibration guides 41, 42, 51, 52, 53 and 54, which are formed on the inner surface of the processing hole 201 And contact with the inner surface during drilling to suppress the occurrence of vibration.

4A to 4C show first and second anti-vibration guides 41 and 42 provided on the body 11 which are cylindrically shaped and extend in the radial direction about the drill center axis, And sixth anti-vibration guides 51, 52, 53, and 54, respectively.

The first and second anti-vibration guides provided on the body and the third to sixth anti-vibration guides provided on the ring have a structure that extends in the radial direction about the longitudinal axis of the drill and is symmetrical.

It is preferable that the first to sixth anti-vibration guides have the same shape and the material is carbide.

The anti-vibration guide includes a cylindrical guide body 54a and a contact surface 54b having an outer surface in contact with the inner surface 201a of the cylindrical machining hole, as described in reference numeral 54. [

The contact surface 54b has the same curved surface as the inner surface 201a of the processing hole.

Figure 5a further includes a filer drill 15 as compared to the drill of Figure 3a as a top view of another type of conventional drill

FIG. 5B is a view of FIG. 5A rotated 180 degrees.

Figures 6a and 6b are views of a drill applying the features of the present invention to the conventional drill of Figures 5a and 5b, including the anti-vibration portions 17a and 17b as in Figures 2a and 2b, .

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the technical idea of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

100: Drill 11: Body
12: cutting insert 12a: inner insert
12b: outer insert 13a, 13b: insert cartridge
14a, 14b: Flute 15: Pilot drill
17a, 17b: vibration preventing portion 20: connecting ring
30: extension bar
41, 42, 51, 52, 53, 54: vibration prevention guide
200: material 201: machining hole
201a: inside of the machining hole

Claims (14)

A drill body (11) including a drill center axis passing through the center of the drill;
A cutting portion including an inner insert (12a) for machining the inside of the hole in the drilling operation and an outer insert (12b) for machining the outside of the hole; And
And first and second anti-vibration parts (17a, 17b) which are square inserts provided symmetrically about the drill center axis behind the inner insert (12a) and the outer insert (12b), respectively,
Each of the inner insert 12a and the first vibration preventing portion 17a and the outer insert 12b and the second vibration preventing portion 17b are placed in a plane parallel to the drill center axis,
The side portions 17aa and 17ba of each of the first and second vibration preventing portions 17a and 17b are disposed parallel to the drill center axis and are in contact with the inner surface 201a of the hole formed during drilling,
And the inner surface is cut by the first and second vibration preventing portions at a portion contacting the inner surface (201a). The method according to claim 1,
Further comprising a plurality of anti-vibration guides (41, 42) mounted on the body (11) and including a cylindrical body (41a) extending radially about a drill center axis,
Wherein the plurality of anti-vibration guides are disposed symmetrically with respect to the drill center axis. 3. The method according to claim 1 or 2,
An extension bar 30 for extending the drill in the longitudinal direction, a connection ring 20 for connecting the body 11 and the extension bar 30 and a plurality of anti-vibration guides installed on the connection ring 20, Further included,
Wherein the plurality of anti-vibration guides provided on the connection ring are symmetrically disposed about the drill center axis,
Wherein each of the plurality of anti-vibration guides comprises a cylindrical body fixed to the connection ring and extending radially with respect to the drill center axis, and a contact surface the same as the shape of the inner surface (201a) of the hole formed during drilling. drill. A drill body (11) including a drill center axis passing through the center of the drill;
A cutting portion including an inner insert (12a) for machining the inside of the hole in the drilling operation and an outer insert (12b) for machining the outside of the hole; And
A plurality of vibration preventive guides of a carbide material including a cylindrical body 41a extending in the radial direction about the drill center axis and having the same shape as the inner surface 201a of the hole formed in the drilling process, (41, 42)
The inner insert 12a and the outer insert 12b are positioned asymmetrically with respect to each other about a drill center axis in a plane that is symmetrical and opposite to each other about a drill axis,
Wherein the plurality of anti-vibration guides are disposed symmetrically with respect to the drill center axis. 5. The method of claim 4,
An extension bar 30 for extending the drill in the longitudinal direction, a connection ring 20 for connecting the body 11 and the extension bar 30, and a plurality of vibrations of a carbide material installed on the connection ring 20, Further,
Wherein the plurality of anti-vibration guides provided on the connection ring are symmetrically disposed about the drill center axis,
Each of the plurality of anti-vibration guides provided on the connecting ring includes a cylindrical body fixed to the connecting ring and extending radially with respect to the drill center axis, and a contact surface which is the same as the shape of the inner surface (201a) Wherein the first and second protrusions are formed on the outer circumferential surface. A drill body (11) including a drill center axis passing through the center of the drill;
A cutting portion including an inner insert (12a) for machining the inside of the hole in the drilling operation and an outer insert (12b) for machining the outside of the hole;
An extension bar (30) for extending the drill in the longitudinal direction;
A connection ring (20) for connecting the body (11) and the extension bar (30); And
And a plurality of vibration preventing guides of a carbide material installed in the connecting ring (20) in a symmetrical state about a drill center axis,
The inner insert (12a) and the outer insert (12b) are asymmetrically positioned about the drill center axis in a plane that is symmetrical about the drill axis and opposite to each other,
Each of the plurality of anti-vibration guides provided on the connecting ring includes a cylindrical body fixed to the connecting ring and extending radially with respect to the drill center axis, and a contact surface which is the same as the shape of the inner surface (201a) Wherein the first and second protrusions are formed on the outer circumferential surface.


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