KR20180052303A - Chamferring Cutting Tools with multi-function - Google Patents

Abstract

The present invention relates to a chamfering cutting tool with a complex function. According to the present invention, a cutting tool has a drill blade coupled to a bottom of a hollow body, and has a blade, which chamfers inner and outer sides of a workpiece, fixed inside the body. The blade has an insertion groove formed on an upper side and has first and second cutting blade parts formed on one side, and a fixing pin mounted in the insertion groove to rotate the blade is formed in the body, wherein a pressing member and an elastic spring elastically pressing the blade are installed on one side of the inside of the body, a finishing bolt is coupled to the other end of the body, and a rimming edge part is formed around the drill blade. Accordingly, drilling, rimming, and internal and external chamfering works of the workpiece are simultaneously performed with one tool, thus providing an advantage of largely reducing work time. A pressing force of the elastic spring is adjusted by operation fastening and releasing the finishing bolt installed in an end of the body in chamfering so as to adjust a force to fix the blade, thus providing an effect capable of processing a workpiece with a different strength with one tool. Moreover, the drill blade is screw-coupled to the body, thereby providing effects capable of replacing several kinds of drill blades having various functions, and capable of separating the finishing bolt to conveniently replace and assemble the spring, the pressing member, and the blade included in the body.

Description

{Chamferring Cutting Tools with multi-function}

The present invention relates to a chamfer cutting tool having a complex function, and more particularly, to a chamfering tool having a complex function, and more particularly, to a chamfering tool having a plurality of chamfering tools for forming chamfering on the inside and outside of a workpiece, A blade having one cutting edge portion and a second cutting edge portion is formed to form chamfering on the inside and outside of the workpiece and a reaming operation can be simultaneously performed after drilling through a reaming cutting edge portion formed on the drill blade And more particularly, to a chamfered cutting tool equipped with a toothbrush.

Generally, when drilling a hole in an iron plate or plate and chamfering on both sides, it is necessary to drill a hole with a general drill tool, chamfer using a tool larger than the hole diameter, and insert a chamfering tool separately into the hole And rear chamfering was performed.

Therefore, two tools for chamfering were required, and there was a limit to be applied only to a structure that could be reversed.

In order to solve these problems, Korean Utility Model No. 20-2011-000554 'A drilling tool with front and rear chamfering' has been proposed. The shape of the tip is as follows. A step portion is formed so as to be inclined such that the diameter is reduced toward the tip drill side in the middle in the middle, and the rear drill bit is formed in the rear surface so that the tip drill side of the drill tool is moved outward by the rear chamfering size The outer diameter is reduced by the chamfering size so as to maintain the same distance by the thickness of the plate material and then the step portion is formed so as to be inclined so as to be larger than the tip drill diameter so as to chamfer the front edge including the drill, It has a body fixed to the machine.

In such a structure, the tool is raised so that the front chamfering portion and the front chamfering portion of the drill tool do not touch during the rear chamfering operation, and the drill tool is raised up to the corner for rear chamfering while the intermediate small- , The drill tool rotates and the drilling tool is rotated at least two revolutions while closely contacting the small diameter portion of the drilled hole to complete the rear chamfering.

As a result of this process, there is a problem in that the small diameter portion in the middle during the rear chamfering is in close contact with the left side of the opened hole and it is very difficult to revolve around the inner side of the hole.

Further, there is a problem in that if reaming operation is required in the hole, the reaming operation must be performed using the reamer.

Korean Utility Model No. 96-33693 'Inner Chamfertool' is a structure in which a blade is fixed inside a holder and a blade is supported by a coil spring and a push rod, and the coil spring is fixed by a fixing pin.

Therefore, the conical shaped push rod stably positions the blade, and the round shape blade is smooth in operation, which facilitates removal and chamfering and is convenient to replace.

However, the conventional inner chamfer tool can not be reamed as well, and a separate post-processing is required. The coil spring always supports the blade with the same pressing force, and the slope length of the chamfer is differently shaped depending on the strength of the workpiece.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to drastically reduce work time by chamfering inside and outside simultaneously with drilling and reaming of workpieces using one tool have.

In addition, by adjusting the pressing force of the elastic spring by adjusting and releasing the finishing bolt provided at the end of the body during chamfering or chamfering, the fixing force of the blade is adjusted so that the workpiece with different strength can be processed using one tool .

Further, the drill bit is screwed into the body to replace various kinds of drill blades, and it is possible to easily replace and assemble the spring, the press member, and the blade provided inside the body by separating the finish bolt .

In order to solve such a technical problem,

A cutting tool in which a drill bit is coupled to a lower end of a body through which the inside is penetrated and a blade for chamfering the inside and the outside of the workpiece is fixed to the inside of the body, A first cutting edge portion and a second cutting edge portion are formed on one side of the body, and a fixing pin is seated on the body so as to be seated in the insertion groove for rotating the blade, A pressing bolt and a resilient spring for pressurizing the body are provided, a finishing bolt is coupled to an upper end of the body, and a reaming cutting edge is formed around the drill blade.

At this time, a finishing bolt is formed on the upper end of the body, and the pressing member elastically presses the blade by an elastic spring provided between the finishing bolt and the pressing member.

In addition, an insertion hole is formed in the body so that the blade can be inserted, and threaded portions are formed on the inner diameters of both sides of the body so that the threaded portion formed at one end of the drill blade and the finishing bolt can be engaged with each other.

The chamfering tool having a complex function according to the present invention has the effect of chamfering the inside and the outside of the workpiece by using one tool, and at the same time, the reaming operation can be performed, thereby greatly reducing the working time.

In addition, by adjusting the pressing force of the elastic spring by adjusting and releasing the finishing bolts provided at the end of the body during chamfering, i.e., chamfering, the fixing force of the blade is adjusted, It is effective.

In addition, the drill bit can be screwed into the body to replace various types of drill blades, and the finishing bolt can be separated to easily replace and assemble the spring, the press member, and the blade provided inside the body.

1 is a perspective view of a chamfered cutting tool with multiple functions according to the present invention;
2 is an exploded view of a chamfered cutting tool with multiple functions according to the present invention;
3 is a cross-sectional view of a chamfered cutting tool with multiple functions according to the present invention.
Figs. 4A to 4E are use state views of a chamfered cutting tool having a complex function according to the present invention. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

1 to 3, a chamfered cutting tool (hereinafter referred to as a "cutting tool") having a complex function according to the present invention has a drill blade 120 coupled to one side of a body 110, The blade 130 is fixed to the inside and the outside of the workpiece 10 to form chamferings 11 and 12 inside the workpiece 10.

At this time, the blade 130 has an insertion groove 132 formed on the upper side, a first cutting edge 133 and a second cutting edge 134 are formed on one side, and the blade 130 A pushing member 140 for elastically pressing the blade 130 is provided at one side of the body 110. The pushing member 140 is provided with a pushing member 140 for pushing the blade 130, A resilient spring 150 is provided and a finishing bolt 160 is coupled to an upper end of the body 110. A reaming cutting edge 122 is formed around the drill blade 120.

Hereinafter, the constitution of each part of the present invention will be described in detail.

The body 110 is formed as a cylindrical body through which the drill 120 is screwed and can be easily replaced with drill blades 120 of various shapes and lengths.

The fixing pin 112 is fixed to the body 110 so that the blade 130 is fixed and rotatable. The fixing pin 112 is perpendicular to the longitudinal direction of the body 110 It is preferable that both ends are penetrated through the body 110 and both ends are fixed by a method such as riveting.

The blade 130 is formed with an insertion groove 132 through which the fixing pin 112 can be inserted in an oblique direction on the upper side so that the blade 130 is rotated about the fixing pin 112, And the other end of the pressing member 140 is brought into close contact with the other side of the blade 130 so that the blade 130 is moved in the longitudinal direction of the body 110 A part of the pressing surface 130c is formed so as to be pressurized.

That is, the first cutting edge 133 and the second cutting edge 134 are formed on one side of the slopes 130a and 130b, respectively, so that when the cutting tool 100 forms the hole 12 in the workpiece 10, The first cutting edge 133 forms the chamfering 11 and 12 on the outer surface and the second cutting edge 134 forms the chamfering 11 and 12 on the inner surface when the cutting tool 100 is pulled out. Can be formed.

In this case, the angle of the slopes 130a and 130b may be variously changed depending on the angle of the chamfering 11 and 12 desired by the user.

An upper portion of the pressing surface 130c prevents the end of the pressing member 140 from deviating from the pressing surface 130c of the blade 130 and prevents the protrusion 135 from coming into close contact with the blade 130. [ .

The upper end of the body 110 is formed with a finishing bolt 160. The pressing member 140 is elastically supported by the elastic spring 150 provided between the finishing bolt 160 and the pressing member 140, Thereby elastically pressing the blade 130.

At this time, the finishing bolt 160 is formed of a hexagonal wrench head bolt and is coupled to the upper end of the body 110.

That is, the pressing member 140 is formed of a cylindrical metal material, so that the elastic spring 150 is prevented from directly contacting the blade 130 of the plate material, and the blade 130 can be more stably supported.

The insertion hole 113 is formed in the body 110 so that the blade 130 can be inserted therein so that the fixing pin 112 is inserted into the insertion groove 132 of the blade 130 from the lower side. And the pressing member 140 and the elastic spring 150 are sequentially inserted into the upper side of the body 110 so that the pressing member 140 presses the blade 130 and firmly fixes the blade 130.

In addition, after the finish bolt 160 is loosened, the elastic spring 150 and the pressing member 140 are separated from each other, and then the blade 130 is inserted into the through- And is disassembled into the lower side of the ball 113 and disassembled.

In addition, on both inner diameters of the body 110, threads 115 and 116 are formed so that the screw 123 formed at one end of the drill blade 120 and the finishing bolt 160 can be coupled.

Accordingly, the drill blade 120 can be replaced with drill blades 120 of various shapes and lengths, and by tightening and releasing the finishing bolt 160 to adjust the elastic force of the elastic spring 150, The pressing force of the blade 140 to press the blade 130 can be adjusted.

That is, the finishing bolt 160 is tightened and loosened according to the strength of the workpiece 10, so that the blade 130 can be smoothly rotated after the chamfering 11 and 12 are formed, It is possible to perform complex machining by using one cutting tool 100.

Around the drill blade 120, a reaming cutting edge portion 122 is formed.

That is, the reaming cutting edge portion 122 is formed by forming a V-shaped groove around the substantially middle position of the drill blade 120 so that the drill blade 120 forms a hole 10a in the workpiece 10 The inner diameter of the hole 10a is cleaned and reaming is performed to process the precise dimension, so that a separate post-work can be omitted and the machining time can be drastically shortened.

4A to 4E are views showing the state of use of the chamfered cutting tool having the complex function according to the present invention.

Hereinafter, an example of the use of a chamfering tool having a complex function according to the present invention will be described with reference to Figs. 4A to 4E.

 4A and 4B, the cutting tool 100 of the present invention is rotated vertically downward from the upper portion of the workpiece 10 for forming the hole 10a so that the drill blade 120 is inserted into the hole 10a, The first cutting edge 133 of the blade 130 fixed to the inside of the body 110 contacts the outer surface of the workpiece 10 and chamfering 11 and 12 is formed around the hole 10a Respectively.

Of course, the cutting tool 100 of the present invention can be fixed to a drill press or the like.

4C, the cutting tool 100 is further moved downward so that the blade 130 is brought into contact with the inner diameter of the hole 10a so as to rotate around the fixing pin 112 fixed to the body 110 do.

4D, the cutting tool 100 is moved until the blade 130 is completely removed from the hole 10a and the cutting tool 100 is moved vertically upward as shown in FIG. 4E, The second cutting edge portion 134 of the first cutting edge 130 contacts the inner surface of the workpiece 10 to form the chamfering 11 and 12 around the hole 10a.

In this manner, the 'V' -shaped cutting edge portion 122 formed around the drill blade 120 in the downward rotational movement process of the drill blade 120 forms the hole 10a, So that the reaming operation can be performed at the same time.

That is, chamfering (11, 12) is formed on the inside and outside of the workpiece (10) in the process of machining the hole (10a) in the workpiece (10) It is possible to work in a short time.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary,

10: workpiece 10a: hole
100: cutting tool 110: body
112: fixing pin 113: insertion hole
120: Drill blade 122: Leaming cutting edge part
123: threaded portion 130: blade
132: insertion groove 133: first cutting edge
134: second cutting edge part 135:
140: pressing member 150: elastic spring
160: Finishing bolt

Claims (4)

A drill blade 120 is coupled to a lower end of a body 110 through which the inside of the body 110 is inserted and chamferings 11 and 12 are formed inside and outside the body 10 in the body 110 In the cutting tool in which the blade 130 is fixed,
The blade 130 has an insertion groove 132 formed at an upper side thereof and a first cutting edge 133 and a second cutting edge 134 formed at one side thereof and the blade 130 is attached to the body 110 A fixing pin 112 is seated in the insertion groove 132 so as to be pivotable and a pressing member 140 for elastically pressing the blade 130 is provided on one side of the body 110, Characterized in that a finishing bolt (160) is coupled to the upper end of the body (110) and a reaming cutting edge (122) is formed around the drill blade (120) Chamfering tool. The method according to claim 1,
A finishing bolt 160 is formed on the other side of the body 110. The pressing member 140 is fixed to the blade 150 by an elastic spring 150 provided between the finishing bolt 160 and the pressing member 140. [ 130). ≪ / RTI > The method according to claim 1,
And a through hole (113) is formed in the body (110) so that the blade (130) can be inserted into the body (110). The method according to claim 1,
Wherein a threaded portion 123 formed on one end of the drill blade 120 and threads 115 and 116 are formed on the inner diameters of both sides of the body 110 so that the threaded portion can be engaged with the finish bolt 160. [ Chamfering tool.

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