KR101173727B1 - Sleeve boss for scratch prevention - Google Patents

Abstract

The present invention relates to a scratch-resistant sleeve boss for a tool holder, comprising: a sleeve having a hollow tubular shape and having a cutout at one end thereof; A shaft for cutting a workpiece by rotating a cutting tool through the inside of the sleeve, the shaft having a flange shape to be detachably attached to one end of the sleeve, and formed on a surface of the workpiece by a chip generated during a cutting process. By configuring to prevent the occurrence of scratches for the cutting, there is an effect that can fundamentally prevent the occurrence of scratches due to the chip (Chip) on the surface of the workpiece during cutting operations such as drill or countersinking.

Machining holder, sleeve, incision, sleeve boss, head, outer peripheral surface

Description

Scratch-resistant sleeve boss for tool holders {SLEEVE BOSS FOR SCRATCH PREVENTION}

The present invention relates to a scratch-resistant sleeve boss for a tool holder, and more particularly, to a workpiece surface by a chip generated during a drill or countersink operation on a workpiece surface using a tool holder for a drilling device or the like. The present invention relates to a scratch prevention sleeve boss for a tool holder for preventing scratches from occurring.

Typically, a drilling device is a tool that performs cutting operations such as drilling, countersink, boring, etc. on a workpiece surface, and a toolholder uses the drilling device to allow the drilling device to perform the cutting operation at the correct position and depth. Holding work tool.

FIG. 1 shows an actual state of a tool holder according to the prior art, FIG. 2 is a block diagram of a tool holder according to the prior art, and FIG. 3 shows a drill (FIG. 3) on the surface of the workpiece 10 using the tool holder according to the prior art. This is a whole block diagram that performs cutting work such as Drill or CounterSink.

As shown in FIG. 2, the tool holder 20 according to the related art is a holder 21 rotatably coupled to the drill head side of the drilling device, and a housing 22 coupled to one side of the holder. ) And a sleeve 23 coupled to one side of the housing 22.

At this time, the inside of the housing 22 and the sleeve 23 is coupled to one end of the shaft 25 and the shaft 25 to rotate in conjunction with the holder 21 to rotate the surface of the workpiece 10 The cutting tool 27 which performs work, such as a drill or a countersink, is arrange | positioned. (Refer FIG. 3).

The sleeve 23 has a function of allowing the cutting tool 27 to perform a drill or countersinking operation at an exact position on the surface of the workpiece 10 and a depth control sensing function of performing the operation by a preset cutting depth. Do this.

In addition, as shown in FIG. 2, at least two incisions 24 are symmetrically formed at one end of the sleeve 23 so that a chip generated during the cutting operation is outside the sleeve 23. Make sure you get out.

Specific configuration or function of the tool holder having the above configuration is described in Republic of Korea Patent Application Publication No. 10-2007-0077271.

However, in the conventional tool holder configured as described above, it is possible to determine the machining position and the cutting depth, but the chip 15 generated on the surface of the workpiece 10 during the cutting operation such as drilling or countersinking may be used. There is a problem that can not prevent the scratch (Scratch) on the surface of the workpiece 10 caused by.

In particular, when precise processing of the surface of the workpiece is required, such as an aircraft assembly process, scratches generated on the surface of the workpiece by the chip 15 have a great influence on the quality of the finished product.

In order to suppress the occurrence of scratches, the inventors have attached some tapes to the surface of the workpiece 10 and performed operations such as drilling or countersinking. However, the scratches could not be prevented.

Therefore, in the related art, in order to remove the generated scratches, after the drilling or countersinking of the work piece 10, the work is reworked by finishing work to perform the additional work of satisfying the quality requirements for the work piece. There is a problem that must be done.

However, the scratch removal by the additional work also cannot be a fundamental solution to the scratch problem, and there is a problem of providing a factor of excessive demand for work time and quality deterioration due to the additional work.

The present invention is proposed in order to solve the problems of the prior art, it is possible to prevent the chip (Chip) generated during the cutting operation, such as drilling or countersinking to the part outside the working diameter range of the workpiece surface to prevent scratch generation It is an object of the present invention to provide a scratch-resistant sleeve boss for a tool holder to prevent it.

In addition, another object of the present invention is to provide a scratch-resistant sleeve boss for a tool holder to protect the workpiece surface without using a protective tape for protecting the workpiece surface during cutting operations such as a drill or countersinking. There is.

Further, another object of the present invention is to provide a scratch-resistant sleeve boss for a tool holder that can omit the finishing work on the workpiece surface after performing a cutting operation such as a drill or countersinking on the workpiece surface.

Further, another object of the present invention is to provide a scratch-resistant sleeve boss for a tool holder that is easily replaceable and easy to mount for work on various hole diameters.

As a means for solving the above problems, the tool holder anti-scratch sleeve boss according to the present invention has a hollow tubular shape and a sleeve 23 having a cutout at one end thereof; In the tool holder 20 including a shaft 25 for cutting a workpiece by rotating a cutting tool through the inside of the sleeve 23, a sleeve having a flange shape to be detachable to one end of the sleeve 23 Boss 30; The sleeve boss 30 further includes at least one cutout formed on an outer circumferential surface of the sleeve 23, the chip being generated during a cutting process at one end of the sleeve. It is characterized by preventing the occurrence of scratches on the surface of the workpiece by the chip (Chip) generated during the cutting process by flowing out to the outside through the portion.

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The cutouts formed on the outer circumferential surface of the sleeve boss 30 may include cutouts symmetrically formed at two outer circumferential surfaces of the sleeve boss 30.

The scratch-resistant sleeve boss for tool holders according to the present invention having the above-described structure prevents chips generated during cutting operations such as drilling or countersinking the workpieces from touching the workpieces other than the cutting workpieces. There is an effect to fundamentally prevent the occurrence of scratches to improve the quality.

In addition, even when the protective tape (Tape) is not used when cutting the workpiece, there is an effect that can prevent the occurrence of scratches on the surface of the workpiece.

In addition, it is possible to save work time by eliminating finishing work after cutting.

In addition, it can be easily exchanged for work of various hole diameters on the workpiece surface, and there is an effect that the tool holder can be easily detached from the sleeve.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and the same reference numerals will be used for components having the same functions and functions when describing the embodiments of the present invention.

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

Figure 4 is a perspective view showing the configuration of a scratch-resistant sleeve boss for a tool holder according to a preferred embodiment of the present invention, Figure 5 is a rear view, Figure 6 is a side view, Figure 7 is a front view.

The scratch-resistant sleeve boss for the tool holder according to the present invention is formed in the form of a flange as shown in Figs.

At this time, the sleeve boss 30 having the flange form band is composed of a head portion 31, the outer peripheral surface 33 having a constant diameter and vertically connected to one side of the head portion 31.

8 shows a state in which the scratch-resistant sleeve boss for the tool holder according to the present invention is coupled to one end of the sleeve 23 of the tool holder 20.

That is, a sleeve 23 having a hollow tubular shape and having at least one cutout (preferably two cutouts symmetrically) at one end thereof, and a cutting tool 27 through the inside of the sleeve 23. It comprises a shaft 25 for cutting the workpiece 10 by rotating a, the workpiece (10) by the chip (Chip, 15) generated during the cutting process by coupling to one end of the sleeve 23 in a flange shape ) It can fundamentally prevent scratches on the surface.

At this time, the description of the specific configuration and operation of the tool holder 20 is as described in the background art.

EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention is demonstrated concretely.

The head portion 31 constituting the sleeve boss 30 according to the present invention has a flat donut shape as shown in FIGS. 4 to 7, the outer diameter of which is equal to the outer diameter of one end of the sleeve 23. Or slightly larger.

In addition, the inner diameter of the head is formed to be larger than the outer diameter of the cutting tool 27 is formed so that the cutting tool 27 can be inserted into the hole formed in the center of the head.

At this time, one side of the head 31 of the sleeve boss 30 is formed with an outer circumferential surface 33 to be in contact with the inner wall of one end of the sleeve 23 to be inserted.

That is, the outer circumferential surface 33 is formed between the outer diameter and the inner diameter of the head portion 31 on one side of the head portion 31, the outer diameter of which is equal to or smaller than the inner diameter of the sleeve 23. It is formed small (see Fig. 8).

One or more cutouts 32 are formed on the outer circumferential surface 33. Preferably, two cutouts 32 may be symmetrically formed, or three or more cutouts 32 may be formed.

The cutout 32 is preferably formed to be equal to the width of the cutout 24 formed at one end of the sleeve 23.

As shown in FIG. 8, the sleeve boss 30 is coupled to the cutout portion 24 formed at one end of the sleeve 23 so that the cutout portion 32 formed on the outer circumferential surface 33 coincides with the cutout portion 24.

Therefore, the chip 15 generated during the cutting process flows out through the cutout 32 formed in the sleeve boss 30 and the cutout 24 formed at one end of the sleeve, and the workpiece (10) It is possible to prevent the occurrence of scratches by the chip 15 on the surface.

9 shows a state in which a cutting operation is performed on the surface of a workpiece by the scratch holder for tool holder according to the present invention.

As shown in FIG. 9, the sleeve boss 30 having the above-described configuration may include a chip generated when the cutting tool 27 cuts the workpiece 10, such as drilling or countersinking. By not directly contacting the cutting work part of 10), scratches such as scratches by the chip 15 on the workpiece 10 can be prevented.

In addition, there is no need for additional work such as finishing work performed after the cutting work, and the work time can be shortened and the cutting work can be performed efficiently such as to improve the processing quality.

In addition, the scratch prevention sleeve boss for the tool holder having the above configuration, there is an effect that can be easily manufactured and detached according to the diameter of the sleeve 23 of the tool holder 20.

Preferred embodiments of the present invention described above are disclosed to solve the technical problem, and those skilled in the art to which the present invention pertains (man skilled in the art) various modifications, changes, additions, etc. within the spirit and scope of the present invention. It will be appreciated that such modifications, changes and the like should be regarded as falling within the scope of the following claims.

1 is a photograph showing the actual appearance of the tool holder

2 is a block diagram of a tool holder

3 is an explanatory diagram for performing a cutting operation using a tool holder according to the prior art;

4 to 7 are a perspective view, a back view, a side view, and a front view of a scratch holder for a tool holder according to the present invention, respectively.

Figure 8 is an overall configuration of the anti-scratch sleeve boss for the tool holder according to the present invention coupled to the tool holder

9 is an explanatory view for performing a cutting operation by coupling the scratch preventing sleeve boss for a tool holder according to the present invention to a tool holder;

Description of the Related Art

10: workpiece 15: chip

20: goal holder 21: holder

22 housing 23 sleeve

24: incision 25: shaft

27: cutting tool 30: sleeve boss

31: head 32: incision

33: outer circumference

Claims (3)

delete A sleeve 23 having a hollow tubular shape and having a cutout at one end thereof; In the tool holder 20, including; A shaft 25 for cutting a workpiece by rotating a cutting tool through the inside of the sleeve 23, Sleeve boss (30) having a flange shape to be detachable to one end of the sleeve (23); Include more, The sleeve boss 30 has at least one cutout formed on an outer circumferential surface detachable from the inner diameter of the sleeve 23 so that a chip generated during a cutting process flows out through the cutout formed at one end of the sleeve. The scratch preventing sleeve boss for a tool holder, characterized in that for preventing the occurrence of scratches on the surface of the workpiece by the chip generated during the cutting process. According to claim 2, wherein the cutout formed on the outer peripheral surface of the sleeve boss 30, Scratch-resistant sleeve boss for a tool holder, characterized in that formed symmetrically on two outer peripheral surfaces of the sleeve boss.

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