KR102100471B1 - Diameter adjustable reamer - Google Patents

Abstract

The present invention relates to a reamer which processes a hole in a workpiece while rotating by a rotary force of a rotation drive apparatus, comprising: a reamer main body formed in a rod shape, wherein one end unit of both end units in a longitudinal direction is detachably mounted on the rotation drive apparatus and rotates; a plurality of cutting edges protruding to a set outer diameter along the circumferential direction on the outer circumferential surface of the other end unit of both end units in the longitudinal direction of the reamer main body, and rotating together with the reamer main body to form the hole having the predetermined inner diameter in the workpiece; and an outer diameter expanding member coupled to the reamer main body and expanding the outer diameter of the cutting edge.

Description

DIAMETER ADJUSTABLE REAMER

The present invention relates to a diameter-adjustable reamer, and more specifically, by adjusting the outer diameter of a cutting edge forming a hole in a workpiece to be expandable, adjusting the diameter to process a hole of a set size even when the cutting edge is worn. It's about your brother Reamer.

In general, a reamer is a tool for forming a hole in a metal, and is a member that compensates for the problem of a drill so that the hole size is uniform and can be accurately processed in a straight line.

In such a reamer, a plurality of cemented carbide or industrial diamond cutting blades are welded to the reamer shaft and rotated while being mounted on a driving device while drilling a hole in a metal or machining an inner surface by using the bottom or side surfaces of the cutting blade.

Here, the reamer has a problem in that when machining a hole, a significant frictional force acts on the cutting edge and wear of the cutting edge decreases, thereby reducing the inner diameter of the machining hole.

Accordingly, the conventional reamer has a problem in that when the wear of the cutting edge occurs, it is impossible to expand the diameter of the cutting edge, so the entire reamer must be discarded and replaced.

On the other hand, reamers must be disposed of when the cutting edge is a cutting edge of a cemented carbide, and if the cutting edge is worn out, the cutting edge of an industrial diamond cutting blade is long, but it is about 300 times more expensive. As a result, there were many problems, such as having to be discarded.

As a related prior art, there is a Seomek reamer disclosed in Korean Patent Registration No. 10-0942771.

In the prior art, holes are formed in the metal through the sack and 4 to 6 cutting edges, and a cermet is formed on the lower cutting surface of the cutting edge to improve durability.

However, the above-described prior art also has a problem in that when the wear of the cutting edge occurs, the inner diameter of the machining hole becomes small, so the entire reamer needs to be replaced.

Therefore, there is a need to improve the problems of the prior art as described above.

Republic of Korea Registered Patent Publication No. 10-0942771

The present invention was created to improve the problems of the prior art as described above, and by configuring the outer diameter formed by the cutting edges formed in the reamer body to be expandable, it can be used by extending the outer diameter of the cutting edge even when cutting edge wear occurs. The aim is to provide an adjustable diameter reamer.

Specifically, the present invention is a diameter-adjustable type that can expand the diameter of the reamer body and cutting edges by pressing the inclined surface of the bolt holder through the expansion head while the expansion bolt constituting the outer diameter expansion member is fastened to the bolt holder formed on the reamer body. The purpose is to provide a reamer.

In particular, the object of the present invention is to provide a diameter-adjustable reamer that can be expanded while the expansion head constituting the expansion bolt is formed at a larger inclination angle than the inclination angle of the inclined surface of the bolt holder, so that the bolt holder can be expanded in a smoothly expanding direction.

In addition, an object of the present invention is to provide a diameter-adjustable reamer capable of selectively increasing the expansion radius by the expansion bolt through a member that is selectively added between the expansion head and the bolt holder.

In addition, the object of the present invention is to provide a diameter-adjustable reamer capable of extending the outer diameter formed by the cutting edges by pressing the cutting edge itself protruding on the outer circumferential surface of the reamer body in the direction of opening.

The diameter-adjustable reamer according to an embodiment of the present invention for achieving the above object is a reamer that processes a hole in a workpiece while rotating by a rotational force of a rotation driving device, and is formed in a rod shape, and has both ends in the longitudinal direction. A reamer main body which is detachably mounted at one end and rotates; A cutting edge protruding from the outer circumferential surface of both ends of the reamer main body in a circumferential direction to a plurality of outer circumferential surfaces, and rotating with the reamer body to form holes of an inner diameter set in the workpiece; And an outer diameter expansion member coupled to the reamer body to expand the outer diameter of the cutting edge.

In addition, the outer diameter expansion member, the other end of the reamer body is detachably fastened along the central axis, the outer diameter of the reamer body is gradually increased toward the other end of the reamer body is formed through the expansion head of the reamer body Expansion pipe for pressing in the direction of opening the other end center; And a bolt holder formed along the central axis at the other end of the reamer body to accommodate the expansion head while the expansion pipe bolt is fastened, and to form an inclined surface pressed by the expansion head.

In addition, the expansion head may be formed at an inclination angle greater than an inclination angle of the inclined surface of the bolt holder.

In addition, the outer diameter expansion member, the additional expansion ring between the expansion head of the expansion bolt and the inclined surface of the bolt holder may further include an additional expansion ring to increase the expansion radius of the center of the other end of the reamer body by the expansion bolt have.

In addition, the outer diameter expansion member may further include a cutting edge pressing ring which is interposed between the cutting edge and the outer peripheral surface of the reamer body to press the cutting edge in an opening direction.

The diameter-adjustable reamer according to an embodiment of the present invention can be used by extending the outer diameter of the cutting edge even when wear of the cutting edge occurs because the outer diameter expansion member is coupled to the reamer body to expand the outer diameter formed by the cutting edges.

Specifically, the present invention can increase the diameter of the cutting edges of the reamer body by pressing the inclined surface of the bolt holder through the expansion head while the expansion bolt constituting the outer diameter expansion member is fastened to the bolt holder formed on the reamer body.

In addition, according to the present invention, the diameter of the cutting edge can be smoothly extended by the expansion head constituting the expansion bolt having a larger inclination angle than the inclination angle of the inclined surface of the bolt holder.

In addition, the present invention can be provided with an additional extension ring to increase the diameter expansion range of the cutting blade when additionally interposed between the expansion head and the bolt holder.

In addition, according to the present invention, the outer diameters of the cutting edges can be additionally extended because the cutting edge pressing ring fitted to the outer circumferential surface of the reamer body presses each of the cutting edges in a direction in which they directly open.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will become apparent to those skilled in the art from the description of the claims.

1 is a perspective view showing a diameter-adjustable reamer according to an embodiment of the present invention.
Figure 2 is an exploded perspective view showing a diameter-adjustable reamer according to an embodiment of the present invention.
3 is a longitudinal sectional view showing a diameter-adjustable reamer according to an embodiment of the present invention.
4 is a longitudinal sectional view showing a diameter-adjustable reamer according to another embodiment of the present invention.
5 is an exploded perspective view showing a diameter-adjustable reamer according to another embodiment of the present invention.
6 is a cross-sectional view showing the diameter-adjustable reamer shown in FIG. 5.

Hereinafter, exemplary embodiments disclosed herein will be described in detail with reference to the accompanying drawings, but the same or similar elements are assigned the same reference numbers regardless of the reference numerals, and overlapping descriptions thereof will be omitted. The suffixes "modules" and "parts" for the components used in the following description are given or mixed only considering the ease of writing the specification, and do not have meanings or roles distinguished from each other in themselves.

In addition, in the description of the embodiments disclosed herein, when it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed herein, detailed descriptions thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in the specification is not limited by the accompanying drawings, and all modifications included in the spirit and technical scope of the present invention , It should be understood to include equivalents or substitutes.

Further, terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but may exist in the middle. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

In the present description, a singular expression includes a plural expression unless the context clearly indicates otherwise, and terms such as “comprising” or “having” include features, numbers, steps, operations, components, and parts described in the specification. Or a combination thereof is intended to indicate the existence of one or more other features or numbers, steps, operations, components, parts, or combinations thereof, which should be understood as not excluding in advance.

1 is a perspective view showing a diameter-adjustable reamer according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a diameter-adjustable reamer according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention It is a longitudinal sectional view showing the diameter-adjustable reamer according to. In addition, Figure 4 is a longitudinal sectional view showing a diameter-adjustable reamer according to another embodiment of the present invention, Figure 5 is an exploded perspective view showing a diameter-adjustable reamer according to another embodiment of the present invention, Figure 6 is Figure 5 It is a cross-sectional view showing a diameter-adjustable reamer.

The diameter-adjustable reamer 10 according to an embodiment of the present invention is a device for processing a hole of a diameter set in a workpiece such as metal while rotating through a rotational force by operation of a rotation drive device such as a drive motor (not shown).

Specifically, the diameter-adjustable reamer 10 according to an embodiment may be configured to include a reamer body 100, a cutting edge 200, and an outer diameter extension member 300 as shown in FIGS. 1 and 2. have.

The reamer body 100 is a component constituting the body of the diameter-adjustable reamer 10 according to an embodiment.

The reamer body 100 is formed in a rod shape of a metal material as shown in FIG. 2, and one end of both ends in the longitudinal direction can be detachably mounted on a rotation drive device (not shown) and rotates by operation of the rotation drive device. can do.

The reamer body 100 may be configured in any form known in the art.

The cutting edge 200 is a component that forms a hole of a diameter set in a workpiece such as metal while rotating together with the reamer body 100.

Specifically, as shown in FIG. 1, the cutting edge 200 may be formed to protrude while forming a plurality along the circumferential direction on the outer circumferential surface of the other end of the reamer body 100 in the longitudinal direction.

The cutting edge 200 may be made of a material different from the reamer body 100 and fixed to the outer circumferential surface of the reamer body 100, for example, may be formed of a cemented carbide or industrial diamond material to protrude a plurality of set outer diameters.

Here, the cutting edge 200 may be composed of six as shown in FIGS. 1 and 2, but is not limited thereto, and may be provided in a quantity of 6 or more.

When the cutting edge 200 is repeatedly used, wear occurs due to frictional force, and accordingly, a problem in that the diameter of the machining hole is reduced.

The outer diameter expanding member 300 is a component for expanding the outer diameter of the cutting edge 200 by being coupled to the reamer body 100.

Specifically, the outer diameter expansion member 300 may be configured to include an expansion bolt 310 and a bolt holder 320 as shown in FIGS. 2 and 3.

The expansion bolt 310 is a component that is detachably fastened along the central axis to the other end of the longitudinal ends of the reamer body 100, and is cut by pressing the center of the other end of the reamer body 100 in the process of being fastened. It is a component that expands the outer diameter of the blade (200).

2, the expansion head 310 may be formed with an expansion head 311 with an outer diameter gradually increasing toward the other end of the reamer body 100 as shown in FIG. 2, and screwed to a bolt holder 320 to be described later. The outer diameter of the cutting edge 200 may be extended by pressing the inner circumferential surface of the bolt holder 320 through the expansion head 311 while opening through the expansion pipe.

The bolt holder 320 is a component that allows the expansion of the cutting edge 200 by the expansion bolt 310 by providing a pressing portion by the expansion head 311 while providing a fastening portion of the expansion bolt 310. .

Specifically, the bolt holder 320 is formed in the form of a hole along the central axis of the other end of the longitudinal direction of the reamer body 100, the expansion bolt 310 can be detachably fastened through screw coupling, the expansion bolt While receiving the expansion head 311 during the fastening process of 310, an inclined surface 312 pressed by the expansion head 311 may be formed.

That is, the bolt holder 320 is formed with an inclined surface 312 that opens toward the other end of the reamer body 100 and is pressed by the expansion head 311, so that the outer diameter of the cutting edge 200 can be expanded.

Here, as shown in FIG. 3, the expansion bolt 310 may be formed with an inclination angle of a shape in which an inclination angle of the expansion head 311 is larger than an inclination angle of the inclined surface 312 of the bolt holder 320.

That is, the expansion head 311 spreads at an inclination angle greater than the inclination angle of the inclined surface 312 of the bolt holder 320 to smoothly expand the inclined surface 312 of the bolt holder 320 in the process of fastening the expansion bolt 310 It can be pressed in the direction, and accordingly the cutting edge 200 can have an outer diameter expanded.

Meanwhile, referring to FIG. 4, the outer diameter expansion member 300 may further include an additional expansion ring 330.

The additional extension ring 330 is a component for increasing the extension radius of the cutting edge 200.

Specifically, the additional extension ring 330 is formed in a ring shape interposed between the expansion head 311 of the expansion bolt 310 and the inclined surface 312 of the bolt holder 320 while the inclined surface of the bolt holder 312 ( 312) while being pressed by the expansion head 311, it is possible to increase the expansion radius around the other end of the reamer body 100.

That is, the additional extension ring 330 may increase the expansion radius by the expansion head 311 by the thickness of the additional extension ring 330 by reducing the inner diameter of the inclined portion of the bolt holder 312.

Meanwhile, referring to FIGS. 5 and 6, the outer diameter expanding member 300 may further include a cutting edge pressing ring 340.

The cutting edge pressing ring 340 is a component for expanding the outer diameter of the cutting edge 200 by pressing the cutting edge 200 in a direction directly opened.

Specifically, the cutting edge pressing ring 340 is formed in a ring shape that is fitted to the outer circumferential surface of the reamer body 100 so as to be vertically movable along the longitudinal direction of the reamer body 100 and can be formed to rotate in the horizontal direction. In addition, a plurality of pressing wedges 341 interposed between each cutting edge 200 and the outer circumferential surface of the reamer main body 100 are provided to press the cutting edges 200 in an opening direction.

That is, the press wedge 341 is composed of the same quantity as the cutting edge 200 and can be extended along the longitudinal direction of the reamer ball body 100 while being fixed to one side of the cutting edge pressing ring 340, and the cutting edge Through the vertical movement and horizontal rotation of the pressing ring 340, the cutting edge 200 can be pressed in the direction in which it is opened while being fitted between the cutting edge 200 and the outer peripheral surface of the reamer body 100, respectively.

Here, the pressing wedge 341 may be formed in a wedge shape having the same inclined surface so that the cutting edge 200 can be opened, as shown in FIGS. 5 and 6, and the cutting edge pressing ring 340 moves vertically. By pressing between the cutting edge 200 and the outer circumferential surface of the reamer main body 100 by pressing the cutting edge 200 in an open direction by horizontal rotation, the outer diameter of the cutting edge 200 can be expanded.

Meanwhile, the cutting edge pressing ring 340 may be provided with an unshown guide member that can be fixed in a horizontally rotating state while moving in the vertical direction.

For example, the fixing member may be formed by including a guide protrusion that protrudes in the form of a protrusion on the outer circumferential surface of the reamer body 100, and a guide groove that is formed in a groove shape refracted on the cutting edge pressing ring 340 and is inserted into the guide protrusion. have.

Accordingly, the cutting edge pressing ring 340 may be fixed in a horizontally rotating state while vertically moving along the guide groove in the refracted state while being inserted into the guide protrusion through the guide groove and then vertically moved again.

That is, the pressing wedge 341 may be maintained in a pressing state in the direction in which the cutting edge 200 is opened by being fixed in a state in which the cutting edge pressing ring 340 is rotated horizontally through the guide groove and the guide protrusion.

As described above, the diameter-adjustable reamer 10 according to an embodiment of the present invention is provided with an expansion bolt 310 constituting the outer diameter expanding member 300 to the bolt holder 320 formed in the reamer body 100. As it is fastened, the outer diameter of the cutting edge 200 can be expanded by pressing the inclined surface 312 of the bolt holder 320 through the expansion head 311, and accordingly, even when the cutting edge 200 wears out, the cutting edge It can be used by expanding the outer diameter without exchanging (200).

In addition, since the outer diameter of the cutting edge 200 can be additionally pressed through the additional configuration of the additional extension ring 330 or the cutting edge pressing ring 340, the extended range of the cutting edge 200 can be increased.

The above-described embodiments are for illustration only, and those having ordinary knowledge in the technical field to which the above-described embodiments belong can easily be modified into other specific forms without changing the technical spirit or essential features of the above-described embodiments. You will understand. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope to be protected through the present specification is indicated by the claims, which will be described later, rather than the detailed description, and should be interpreted to include all modified or modified forms derived from the meaning and scope of the claims and their equivalent concepts. .

10: diameter adjustable reamer
100: reamer body
200: cutting edge
300: outer diameter expansion member
310: expansion bolt
311: expansion head
312: Slope
320: bolt holder
330: additional extension ring
340: cutting edge pressing ring
341: press wedge

Claims (5)

In a reamer that rotates by the rotational force of the rotary drive to process the hole in the workpiece,
Reamer body is formed in the form of a rod, one end of which is detachably mounted to the rotation driving device and rotates;
A cutting edge protruding from the outer circumferential surface of both ends of the reamer main body in the circumferential direction to a plurality of outer circumferential surfaces; And
It includes an outer diameter expansion member coupled to the reamer body to expand the outer diameter of the cutting edge,
The outer diameter expansion member,
The other end of the reamer main body is detachably fastened along a central axis, and an expansion head having an outer diameter gradually increases toward the other end of the reamer main body, and is pressed in a direction to open the center of the other end of the reamer main body through the expansion head. Expansion bolt;
A bolt holder formed along the central axis at the other end of the reamer body to accommodate the expansion head while the expansion bolt is fastened, and to form an inclined surface pressed by the expansion head;
An additional extension ring interposed between the expansion head of the expansion bolt and the inclined surface of the bolt holder to increase the expansion radius of the center of the other end of the reamer body by the expansion bolt;
It is formed in a ring shape to be fitted to the outer circumferential surface of the reamer body so as to be vertically movable along the longitudinal direction of the reamer body and rotatable in the horizontal direction, and interposed between the cutting edge and the outer circumferential surface of the reamer body, respectively. A cutting edge pressing ring provided with a plurality of pressing wedges having a cross section of a shape to press the cutting edge in a direction in which it is opened through horizontal rotation; And
It includes a guide member for fixing the cutting edge pressing ring in the horizontal direction while moving in the vertical direction,
The guide member,
A guide protrusion protruding from the outer peripheral surface of the reamer body; And
It is formed in the form of a groove refracted on the cutting edge pressing ring and is caught by the guide projection, and guides the vertical movement and horizontal rotation of the cutting edge pressing ring while fixing the cutting edge pressing ring in a horizontally rotating guide groove. Including diameter adjustable reamer.
delete According to claim 1,
The expansion head,
A diameter-adjustable reamer, which is formed at a larger inclination angle than the inclination angle of the bolt holder inclined surface.
delete delete

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