KR101534441B1 - Deburring device - Google Patents

Abstract

The present invention relates to a deburring device efficiently remove burr generated on a front surface and a rear surface of a workpiece when a hole is processed with a drill. A brush which is capable of controlling a cutting depth is installed in a body of a drilling tool to process the hole and to remove the burr to realize the new type composite drilling tool in order to efficiently remove the burr occurred on the front surface and the rear surface of the workpiece and process without any damage of the surface of the hole and remove various burrs regardless of a thickness and a material of the workpiece.

Description

Deburring device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burr removing apparatus, and more particularly, to an apparatus for efficiently removing burrs generated on the front and back surfaces of a workpiece when drilling a hole with a drill.

In general, drilling is one of the most frequently performed cutting processes today, including milling.

Such drilling is a cutting process that produces high quality holes with a small cost and a short process time. It is frequently used throughout the industry. The shape and material of the part to be subjected, the material and diameter of the drill, Varies.

Burr is a typical dimensional error factor in drilling.

Generally, when the cutting force generated during drilling is larger than the burring force, plastic deformations generate a workpiece, and burrs occur mainly on the exit surface of the workpiece.

In other words, bur is an unnecessary part caused by plastic deformation in most cutting process as well as drilling, and it can be classified into an entrance bur and an exit bur, which are undesired protruding portions generated at the corner after machining. Is formed in a small wedge shape on the upper surface of the workpiece by the edge portion of the drill, and the exit burr is formed on the lower surface of the workpiece by pushing the drilled material immediately before penetration of the drill.

Such burrs, in particular the outgoing burrs, can be a major impediment to the quality and assembly of parts, for example when assemblies are out of tolerance they can not be assembled, and even if they are within tolerances, I will leave.

In addition, the worker may be injured, and another process such as deburring after the cutting process and finishing of the edges have a great effect on the cost of the product, resulting in a loss of time and cost.

Therefore, it is preferable that the burr once generated should be removed and, if possible, inducing burrs to be prevented or minimized to an acceptable minimum size.

However, the inlet and outlet burrs frequently generated in the hole machining are characterized in that it is difficult to remove the burr simultaneously with the hole machining in one process.

Also, the time and cost of the burr removal process is proportional to the height and thickness of the burr, so that the cost can be reduced by reducing the burr size.

However, even if the size of the burr is small, it is impossible to prevent the burr from being generated.

Therefore, there is a need for a composite drill tool having a burr removing function for removing burrs during hole machining using a drill.

In consideration of this point, the Korean Registered Utility Model No. 20-0289956 and Korean Patent Laid-Open No. 10-20130024133 propose a technique for simultaneously removing the burrs when drilling holes.

However, all of these techniques are based on a method of removing burrs by installing inserts (fixed tool blades). When such an insert is used, a shock-resistant force acts on the workpiece and the tool to break the burr removing insert. Occasionally, asymmetric chamfers are formed at the process inlet and outlet sides.

Particularly, in the case of a workpiece such as a thin plate and a soft workpiece, not only the inner surface of the hole but also the edge portion is damaged and the dimension is changed. The corner portion where the burr is removed does not become a rounded corner, This also becomes a problem.

In the Korean Registered Utility Model No. 20-0289956, the deburring insert is installed only in one direction of the drill body, and in the case of Korean Patent Laid-open No. 10-20130024133, the depth of insertion of the deburring insert is not adjustable The degree of accuracy (deburring) or effect may be deteriorated.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a new type of composite drill tool capable of removing burrs simultaneously with drilling by mounting a brush, Which can effectively remove burrs generated on the front and rear surfaces of the burrs.

It is still another object of the present invention to provide a burr removing device capable of removing various burrs regardless of the thickness and material of a workpiece which can be machined without damaging the surface of the hole at all.

In order to achieve the above object, the burr removing apparatus of the present invention has the following features.

The burr removing device includes a drill head and a drill body for drilling a hole, a drill cover and a shank mounted on a driving side of the drill tool while supporting the drill head and the drill body, A brush assembly protruding through a brush hole on a side surface to remove burrs generated during hole machining, and a brush block mounted inside the drill body and supporting a rear surface of the brush assembly.

Therefore, the burr removing apparatus is characterized in that burrs on the front and rear surfaces of the workpiece produced by drilling can be efficiently removed by using the brush mounted on the drill tool body.

Here, the brush block is constituted by a chevron slide upper body and a cheek slider lower body that are tapered from each other in an up-and-down direction and a left-right direction, and the hypotenuse slide upper body is screwed to the drill cover and the shank- When the adjusting screw is operated, it is possible to adjust the protruding length (infeed depth) of the brush bristles in the brush assembly by using the interlocking action between the slanting upper body and the lower sliding lower body.

At this time, the obliquely sliding lower body of the brush block has oblique faces on both sides and the obliquely lower oblique face having one oblique face contacting with the oblique face is disposed on both sides of the obliquely sliding lower body. Therefore, The lower body can be moved to the left and right at the same time.

The brush assembly may include a drill body lead having a plurality of bristles embedded therein and a drill cover lid attached to a rear surface of the drill body lead. Accordingly, when the brush assembly moves to the left and right, And guide grooves formed in the shank so as to be guided.

As a preferred embodiment, the burr removing device may further include a spring, which is mounted between the front surface of the brush assembly and the inner wall surface of the drill body, so as to always resiliently support the brush assembly inward. In the case of the drill head, A head exchange type drill head which is mounted in a detachable structure can be applied.

The burr removing apparatus provided in the present invention has the following advantages.

First, it is possible to efficiently remove burrs simultaneously with hole machining in a single process.

That is, various burrs are generated depending on the kind of workpiece and processing conditions, and flexibility of the tool capable of efficiently removing burrs can be secured.

Secondly, since the flexibility of the brush is effectively utilized, edge quality deterioration due to a shock cutting force can be prevented irrespective of the thickness and material of the workpiece.

For example, it is possible to prevent edge breakage or the like when the thickness of the workpiece is thin and when a soft material is processed, and it is possible to make rounded rounded corners, thus securing the quality of the hole machined surface.

Third, since the infeed depth of the brush can be adjusted, burrs of various shapes and sizes can be effectively removed.

1 is an exploded perspective view showing a burr removing device according to an embodiment of the present invention;
FIG. 2 is a perspective view illustrating a burr removing apparatus according to an embodiment of the present invention.
3 is a cross-sectional view showing a deburring device according to an embodiment of the present invention
4 is a cross-sectional view showing a state in which the brush infeed depth is controlled in the burr removing device according to the embodiment of the present invention
5 is an exploded perspective view showing some components of the burr removing apparatus according to another embodiment of the present invention.
6 is a cross-sectional view showing a state in which the brush infeed depth is controlled in the burr removing apparatus according to another embodiment of the present invention
7 is a cross-sectional view showing a state of use of the burr removing device according to the embodiment of the present invention

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

1 to 3 are an exploded perspective view, a combined perspective view and a cross-sectional view showing a burr removing device according to an embodiment of the present invention.

As shown in FIGS. 1 to 3, the burr removing device is a device that can effectively remove burrs and holes simultaneously in one process, It is possible to effectively remove burrs that occur in various forms regardless of the thickness and material of the workpiece and to ensure the quality of the hole machining.

To this end, the burr removal device comprises a drill head 10, a drill body 11, and a drill cover and shank 12 as means for machining holes in the workpiece.

The drill head 10 is mounted on the lower end of the drill body 11 as a portion for substantially drilling the hole with respect to the workpiece and the drill head 10 is detachably coupled to the drill body 11 side A head exchange drill head can be applied.

The drill body 11 is formed in a cylindrical shape having a space inside and an open top to accommodate the brush assembly 14, the brush block 15 and the like, And is fastened by a pin (20).

A pin hole 21a is formed at the upper end of the drill body 11 and a pin hole 21b is formed at the lower end of the drill cover and the shank 12. The pin hole 21b is formed in the upper end portion of the drill body 11 The drill body 11 and the drill cover and the shank 12 are engaged with each other so that the lower end of the drill cover and the shank 12 is partially inserted and the pins 20 are fastened to the corresponding pin holes 21a and 21b at this time So that it can be combined with a detachable structure.

The drill body 11, the drill cover, and the pin holes 21a and 21b in the shank 12 may be formed in the shape of a slot having a long hole penetrating up and down.

A brush hole 13 in a substantially rectangular shape is formed on one side of the side of the drill body 11. A brush bristle 14a in the brush assembly 14 is connected to the drill body 11 through a brush hole 13 at this time. As shown in Fig.

The drill cover and the shank 12 are mounted on the driving side of the drill tool. The mounting structure of the drill cover and the shank 12 is the same as that of the conventional drill cover and shank 12, and a detailed description thereof will be omitted.

The body of the drill cover and the shank 12 is formed into a cylindrical shape having a hole penetrating along the axis, and is coupled with the drill body 11 in a pin engagement structure.

The drill cover and the shank 12 are provided at the center of the upper surface thereof with a head seating groove 22 communicating with a hole having a central axial line. The head portion of the adjusting screw 17 can be inserted and seated.

A guide groove 18 is formed in the lower end surface of the drill cover and the shank 12 in a lateral direction perpendicular to the axial direction and the guide groove 18 is formed in the brush assembly 14 The upper portion of the drill cover lid 14c can be inserted and slid so that the brush assembly 14 is guided through the drill cover lid 14c that slides along the guide groove 18 to receive accurate linear guidance .

The brush assembly 15 is mounted on the inside of the drill body 11 and is provided with a brush hole 15 on the side of the drill body 11, (13) so that the burr can be removed together with the hole machining.

The brush assembly 14 includes a plurality of brush bristles 14a for removing burrs, a drill body lead 14b for supporting the brush bristles 14a, a plurality of brush bristles 14b attached to the rear surface of the drill body lead 14b And a drill cover lead 14c.

The brush bristles 14a are made of a material such as a nylon abrasive filament including a metal and an abrasive. The brush bristles 14a are embedded in the entire area of the drill body lead 14b, And can be fixed by a losing structure or the like.

The brush assembly 15 composed of a combination of the brush bristles 14a, the drill body lids 14b and the drill cover lids 14c is placed on the floor in the inner space of the drill body 11 and is disposed in a vertically erected posture, In this state, the brush bristles 14a on the front surface are protruded through the brush holes 13 of the drill body 11 by a predetermined length, so that the burrs 14a can be removed through the protruded brush bristles 14a at this time do.

The brush assembly 14 is guided by the drill cover 14c guided along the guide groove 18 of the drill cover and the shank 12 when the brush assembly 14 is moved to the left and right, In addition, the drill body lid 14b is inserted into the brush hole 13 in the drill body 11 and is slid. By this double guiding action, the brush assembly 14 can be moved in the lateral direction more accurately.

As another example, in the case of the brush assembly 14, it is possible to include a drill body lead 14b and a drill cover lid 14c in the form of one integral block, for example a brush body portion 14d described later In this case, an inclined surface may be applied to the rear surface of the brush body portion 14d to have a linkage relationship with the brush block side.

Particularly, in order to remove various types of burrs, a brush block 15 is provided as an operating means for adjusting the depth of penetration of the brush, that is, the length of the protrusion. The brush block 15 is located inside the drill body 11, And is attached to the rear face of the assembly 14, that is, the face opposite to the face with the bristles.

The brush block 15 is configured to move the brush assembly 14 to the left and right by using cooperative movements, for example, up and down movements and left and right movements, between the two members assembled via inclined oblique faces.

For this purpose, a slanting upper body 15a located on the inside and a lower slanting lower body 15b located on the outer side are provided. At this time, the slanting lower body 15a and the lower slanting lower body 15b are inclined planes 16a, 16b, that is, in contact with each other through an inclined surface inclined at a certain angle with respect to the vertical axis.

Accordingly, when the obliquely sliding upper body 15a moves up and down, the obliquely lower sliding body 15b facing the inclined oblique face can move left and right. As a result, the obliquely sliding lower body 15b is moved And the degree of protrusion of the brush assembly 14 which is in contact therewith can also be adjusted while moving left and right.

For example, as shown in FIG. 4, when the obliquely sliding upper body 15a moves downward, the obliquely lower sliding body 15b horizontally moves outward and pushes the brush assembly 14 outward. When the slide upper body 15a is moved upward, the lower slide lower body 15b moves horizontally inward to provide a margin for allowing the brush assembly 14 to come in.

A plurality of springs 19 are provided to elastically support the brush assembly 14 by means of maintaining the adjusted protrusion length of the brush assembly 14.

This spring 19 is mounted between the front surface of the brush assembly 14, for example the front surface of the drill body lid 14b or the drill cover lid 14c, and the inner wall surface of the drill body 11, The brush assembly 14 is constantly supported inward by the force exerted by the brush block 19 so that the brush assembly 14 can establish a normal contact state with the brush block 15 side.

An adjusting screw 17 is provided as a means for operating the movement of the brush block 15 for controlling the depth of the brush.

The adjusting screw 17 is disposed in parallel to the drill cover and through the hole formed along the axis of the shank 12 and inserted into the head seating groove 22 of the drill cover and shank 12 through the head portion. And is mounted in a structure in which the position is fixed by a set screw 23 which is engaged with the drill cover and the shank 12. [

That is, a screw engagement groove 24 is formed in the head portion of the adjustment screw 17 along the periphery of the head, and the drill cover and the shank 12 penetrate in the radial direction of the screw engagement groove 24, The leading end of the set screw 23 is caught.

Accordingly, the adjusting screw 17 can be rotated in place while the position is fixed through the engagement structure with the set screw 23.

The adjustment screw 17 is screwed with the obliquely sliding body 15a of the brush block 15 so that the obliquely sliding upper body 15a can be moved up and down by the screw transmission structure when the adjusting screw 17 is turned. .

In this case, the obliquely sliding lower body 15b of the brush block 15 has a shape in which the center portion of the rear surface having the inclined surface 16b is engaged, for example, both edges are inclined surfaces 16b and the inner portion is hollow So that it does not interfere with the threaded portion of the adjusting screw 17 extending downward after it is fastened to the slidable body 15a.

Meanwhile, in the present invention, there is provided a type in which one obliquely sliding lower body 15a moves a single obliquely sliding lower body 15b and a type in which a plurality of obliquely sliding lower bodies 15b are moved by a single obliquely sliding upper body 15a do.

As an example, a hypotenuse slide lower body 15b is disposed on one side of a hypotenuse slide upper body 15a having a slant surface 16a on only one side, and the hypotenuse slide upper body 15a and the hypotenuse slide lower body 15b, So that the obliquely sliding lower body 15b on one side can move left and right (inward and outward) by the movement of the obliquely sliding upper body 15a when the adjusting screw is operated .

As another example, the obliquely sliding lower body 15a having the oblique side 16a on both sides thereof and the obliquely sliding lower body 15b are disposed on both sides of the obliquely sliding lower body 15a. The obliquely sliding lower body 15a, (15b) are in contact with each other through the inclined surfaces (16a, 16b), so that the obliquely sliding lower body (15b) on both sides of the obliquely sliding lower body (15b) ).

Of course, by forming a plurality of inclined surfaces 16a on the circumferential surface of the obliquely sliding body 15a and disposing the corresponding number of obliquely sliding lower bodies 15b corresponding thereto, three oblique sliding bodies 15a can be used, It is also possible to simultaneously move a plurality of hypotenuse sliding bodies 15b such as four.

5 is an exploded perspective view showing some components of the burr removing device according to another embodiment of the present invention.

5 shows another embodiment of the brush assembly 14 and the brush block 15 for burr removal and includes a drill head 10, a drill body 11, a drill cover, and a shank 12 ) Are the same as the above example, so a detailed description thereof will be omitted.

The brush assembly 14 includes a plurality of brush bristles 14a for substantially removing burrs and a brush body 14d in the form of an integral block for holding the brush bristles 14a.

The brush assembly 15, which is a combination of the brush bristles 14a and the brush bristles 14d, is placed on the floor in the inner space of the drill body 11 and is disposed in a vertically erected posture. In this state, The bristles 14a are protruded out through the brush holes 13 of the drill body 11 by a predetermined length, so that burrs can be removed.

The upper end of the brush body 14d is guided along the guide groove 18 of the drill cover and the shank 12 and slides in the brush hole 13 of the drill body 11 so that the brush assembly 14 can be moved more accurately.

Particularly, the rear surface of the brush body 14d is formed of an inclined surface 16b. The inclined surface 16b of the brush body 15d contacts the inclined surface 16a of the obliquely sliding body 15a of the brush block 15 through the inclined surface 16b do.

In other words, the brush body 14d can serve as the drill body lead 14b and the drill cover lead 14c as well as the role of the undercut slide lower body 15b described in the above embodiment.

A spring 19 is mounted between the front surface of the brush body 14d and the inner wall surface of the drill body 11 so that the brush assembly 14 is constantly supported inwardly by the brush block 15 As shown in Fig.

In addition, the brush block 15 includes an obliquely sliding upper body 15a positioned on the inner side. The obliquely sliding upper body 15a at this time has a slope 16a on both sides, So that the brush body 14d can be brought into contact with the inclined surfaces 16b of the brush body 14d.

At this time, the obliquely slid upper body 15a is coupled with the adjusting screw 17 mounted on the drill cover and the shank 12 in a screw tightening structure. When the adjusting screw 17 is turned, (15a) can move up and down.

That is, as shown in Fig. 6, the brush body 14d of the brush assembly 14 is disposed on both sides of the obliquely sliding upper body 15a having the inclined surfaces 16a on both sides thereof, The slide body 15a and the brush body 14d on both sides contact each other through the inclined surfaces 16a and 16b so that the brush 14a is moved by the movement of the obliquely- The bristles 14d of both the bristles can simultaneously move leftward and rightward, so that the infeed depth of the brush can be adjusted.

7 is a cross-sectional view showing the use state of the burr removing apparatus according to the embodiment of the present invention.

As shown in Fig. 7, a hole is machined in the workpiece by the drill head 10 mounted on the drill tool with the drill cover and the shank 12, and with the operation of the drill tool, do.

Burrs are formed on the entrance surface and the exit surface of the holes of the workpiece processed while passing the drill head 10 first.

At this time, the brush bristles 14a of the brush assembly 14 protruding toward the side surface of the drill body 11 descend along the back of the drill head 10 and are formed on the entrance face of the hole and on the exit face of the hole So that the burrs can be removed and removed by the plurality of brush bristles 14a that hit the burrs.

The corner portions of the hole entrance face and the exit face from which burrs are removed can be machined into a rounded shape by the cutting action of the brush bristles 14a and the inner surface of the hole is also brought into contact with the brush bristles 14a A smooth machined surface can be obtained.

That is, when the hole is machined, a plurality of brush bristles 14a are drilled in such a manner that the brush bristles 14a are smoothly wiped off without impact, so that the corner portions of the hole entrance surface and the exit surface can be rounded, The quality of the hole machining surface can be ensured.

In particular, even when a hole is formed in a thin plate or a workpiece made of a soft material, the inner surface of the hole as well as the corner portion are not damaged, so that the hole of a precise dimension and quality can be processed.

In addition, since holes can be machined by controlling the depth of brush penetration, holes of workpieces of various thicknesses and materials can be efficiently machined and burrs produced in various shapes and sizes can be effectively removed.

10: Drill head 11: Drill body
12: Drill cover and shank 13: Brush hole
14: Brush assembly 14a: Brush
14b: Drill body lead 14c: Drill cover lead
14d: Brush body part 15: Brush block
15a: hypotenuse slide upper body 15b: hypotenuse slide lower body
16a, 16b: inclined surface 17: adjusting screw
18: guide groove 19: spring
20: pin 21a, 21b: pin hole
22: head seating groove 23: set screw
24: Screw engagement groove

Claims (6)

A drill head (10) and a drill body (11) for drilling holes; A drill cover and shank (12) mounted on the driven side of the drill tool while supporting the drill head (10) and the drill body (11); A brush assembly 14 installed inside the drill body 11 and protruding through a brush hole 13 on the side of the drill body 11 to remove burrs generated during drilling, And a brush block 15 mounted inside the brush assembly 14 and supporting the rear surface of the brush assembly 14,
The brush block 15 is constituted by a hypotenuse slide upper body 15a and a hypotenuse slide lower body 15b that are in contact with each other through the inclined surfaces 16a and 16b and cooperate with each other in the up and down and left and right directions, Is configured to be screwed with the adjusting screw (17) on the side of the drill cover and the shank (12) so that the protruding length of the brush assembly can be adjusted by interlocking between the obliquely sliding upper body and the obliquely sliding lower body when operating the adjusting screw Removal device.
delete The method according to claim 1,
The obliquely sliding lower body 15a of the brush block 15 has an oblique face 16a on both sides and a cheeky slide lower body 15b having a cheek face 16b on one side in contact with the oblique face 16a, ) So that when the obliquely sliding upper body moves up and down, the lower oblique sliding lower bodies can simultaneously move left and right.
The method according to claim 1,
The brush assembly 14 includes a drill body lead 14b having a plurality of brush bristles 14a embedded therein and a drill cover lead 14c attached to a rear surface of the drill body lead 14b, Wherein the drill cover lid (14c) is inserted into the guide groove (18) formed in the drill cover and the shank (12) to be guided when moved.
The method according to claim 1 or 4,
Further comprising a spring (19) mounted between a front surface of the brush assembly (14) and an inner wall surface of the drill body (11) to elastically support the brush assembly (14) inward.
The method according to claim 1,
Characterized in that the drill head (10) comprises a head exchange type drill head which is mounted in a detachable structure on the side of the drill body (11).

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