KR102196584B1 - Counter sink cutter - Google Patents

Abstract

The present invention, one end is fastened to the processing apparatus and the cylindrical rotation shaft 20 to rotate; A cut-out part 21 formed such that a part of the outer peripheral surface of the rotation shaft 20 becomes a flat plane by cutting one side of the other end of the rotation shaft 20 by a predetermined length; A fastening groove 22 that starts at the lower end of the cutout portion 21 and is formed in a predetermined length along the circumference of the outer peripheral surface of the rotation shaft 20; A cutter part 30 in which a coupling hole 32 into which the other end of the rotation shaft 20 is inserted is provided in the center, and at least one cutting edge 31 is mounted at a lower side thereof; It is configured to include a fastening means 34 installed so as to protrude into the coupling hole 32 on the inner circumferential surface of the cutter part 30, so that the fastening means 34 moves along the cutout 21 After inserting the rotation shaft 20 into the coupling hole 32 of the cutter part 30, the cutter part 30 is rotated with respect to the rotation shaft 20, so that the fastening means 34 is connected to the fastening groove ( 22), thereby providing a countersink cutter, characterized in that the cutter unit 30 and the rotation shaft 20 are fastened.

Description

Counter sink cutter}

The present invention relates to a counter sink cutter for forming a counter sink or counter bore in a structure, and to a counter sink cutter that is easy to mount and disassemble.

When connecting two structures, they are connected by fastening them with a connecting member such as a bolt, nut or screw. At this time, in general, a flat head type coupling member is fastened or a wrench head type coupling member is connected to form a groove in the structure so that the head of the coupling member is inserted into the structure and does not protrude. It is called a counter sink or counter bore.

The counter sink (counter sink) is a groove formed to fasten the countersunk head type coupling member, the counter bore (counter bore) is a groove formed to fasten the wrench head type coupling member, hereinafter in this specification, the The counter sink and the counter bore are collectively referred to as "counter sink".

In order to form the countersink, a countersink cutter is mounted on a processing device such as a milling machine or a boring machine, and the countersink cutter is mounted through a hole in the structure to which the coupling member is to be fastened. However, in this case, a plurality of coupling members are generally fastened to the structure to couple the structures. Accordingly, after processing one of the countersinks, the position of the countersink cutter must be moved to an adjacent coupling member fastening hole in order to process the countersink in the adjacent coupling member fastening hole.

However, in the conventional countersink cutter, a rotation shaft that is mounted on a collet of the processing device and transmits a rotational motion supplied from the processing device and a cutter part mounted on the end of the rotation shaft and provided with a cutting edge are integrally formed, or The rotation shaft and the cutter portion were fastened with bolts or the like. Because of this structure, when the countersink cutter is moved to an adjacent coupling member fastening hole to process another countersink after finishing the countersink processing work in one coupling member fastening hole in the structure, it is bitten by the collet, etc. There was an inconvenience in that the countersunk cutter had to be completely separated and re-installed after changing its position, or the bolted cutter part was removed by releasing the bolted portion, and then the position was changed and then fastened with a multi-bolt.

Due to the combination and disassembly of such complex countersink cutters that are repeatedly repeated during the plurality of countersink processing operations, there is a problem that at least two workers must work, and a lot of time and effort of a lot of workers must be put into the work. there was.

The present invention has been proposed to improve the problems of the prior art, and an object of the present invention is configured so that a combination and disassembly work for moving a working point of a countersink cutter during a plurality of countersink processing operations can be performed simply and quickly. To provide a countersink cutter.

The present invention, in order to achieve this object, one end is fastened to the processing apparatus and rotated cylindrical rotation shaft 20 and; A cutout portion 21 formed in a shape cut so that a part of the outer circumferential surface becomes a flat plane by a predetermined length starting from the end of the other end of the rotation shaft 20; A fastening groove 22 that begins at the lower end of the cutout 21 and is concavely extended to a predetermined length along the circumference of the outer circumferential surface of the rotation shaft 20; A cutter part 30 in which a coupling hole 32 into which the other end of the rotation shaft 20 is inserted is provided in the center, and at least one cutting edge 31 is mounted at a lower side thereof; Consisting of a cylindrical pin, the cylindrical pin is inserted into a fastening hole 33 formed to penetrate one side of the cutter part 30 and a part of the coupling hole 32, and the cutter part 30 ) Is configured to include a fastening means 34 installed to protrude toward the coupling hole 32 on the inner circumferential surface of the After being inserted into the coupling hole 32 of the cutter part 30, the cutter part 30 is rotated with respect to the rotation shaft 20 so that the fastening means 34 is inserted into the fastening groove 22. By doing so, it proposes a countersink cutter characterized in that fastening the cutter unit 30 and the rotation shaft 20.

At this time, the fastening means 34 may be configured as a spherical or hitting ball instead of a cylindrical pin, and configured to protrude through the coupling hole 32.

In addition, the inside of the rotation shaft 20, a flow path that extends from one end of the rotation shaft 20 and communicates with the outside, and communicates with the outside of the side of the other end of the rotation shaft 20 to which the cutter unit 30 is coupled. 25 is formed, when the cutting oil or air supplied from the processing device is transferred through the flow path 25 so that the cutting edge 31 of the cutter unit 30 performs a cutting operation, the cutting oil or air You can also supply.

In the present invention, the cutter unit provided with the rotating shaft and the cutting edge mounted on the processing device is not integrally formed or fastened with bolts or nuts, and the fastening and separation are made simply by rotating the cutter unit at a predetermined angle with respect to the rotating shaft. As a result, the fastening and separation time of the countersink cutter is drastically shortened, and the user's effort input at this time is also drastically reduced, thereby improving work efficiency.

1 is a perspective view showing a counter sink cutter according to the present invention.
Figure 2 is a perspective view showing a rotation axis of the counter sink cutter according to the present invention.
3 is a block diagram showing a cutout and a fastening groove of the countersink cutter according to the present invention.
4 to 6 are perspective views showing a cutter part of a counter sink cutter according to the present invention.
7 is a block diagram showing a coupling method of the cutter unit and the rotation shaft of the countersink cutter according to the present invention.
8 is a block diagram showing a flow path inside the rotating shaft of the countersink cutter according to the present invention.

A preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. In describing the embodiments of the present invention, matters that are not directly related to the technical features of the present invention, or are obvious to those of ordinary skill in the technical field to which the present invention pertains, and parts that can be duplicated in each embodiment As for the detailed description thereof will be omitted.

In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intentions or customs of users and operators, and thus their definitions should be made based on the contents throughout the present specification describing the present invention.

As mentioned above, the counter sink is a groove formed for fastening of the countersunk head type coupling member, and the counter bore is a groove formed for fastening of the wrench head type coupling member. Hereinafter, in the present specification, the counter sink and the counter bore will be collectively referred to as "counter sink".

The countersink cutter 10 according to an embodiment of the present invention is largely composed of a rotation shaft 20 and a cutter unit 30 as shown in FIG. 1.

The rotation shaft 20 is mounted on a processing device such as a milling machine or a boring machine, and one end of the rotation shaft 20 is fixed by being bitten by a collet of the processing device, and rotates together according to the rotation of the collet of the processing device. The rotational force is transmitted to the cutter unit 30.

The cutter part 30 is coupled to the other end of the rotation shaft 20, and a cutting edge 31 is provided so that the cutting edge 31 cuts the processing surface while rotating together with the rotation of the rotation shaft 20 Thereby forming a countersink in the structure.

The greatest technical feature of the present invention lies in the improved structure so that the coupling of the rotation shaft 20 and the cutter unit 30 is easy, simple, and can be performed in a short time.

To this end, the rotation shaft 20 of the present invention countersink cutter 10, as shown in Figs. 2 to 3, a cutout 21 and a fastening groove 22 at the other end of the rotation shaft 20 are configured. It is characterized by a technical feature.

The cut-out part 21 is formed by forming a flat cross-section by a predetermined depth on one side of the other end of the cylindrical rotation shaft 20 by cutting the outer circumferential surface of the rotation shaft 20 by an arc of a predetermined length. .

The fastening groove 22 starts at the lower end of the cutout 21 and is formed with a predetermined length along the circumference of the outer circumferential surface of the rotation shaft 20. In this case, the use of the term'bottom' is to express the top and bottom based on the direction shown in the drawing.

The cutout 21 and the fastening groove 22 perform easy coupling of the rotation shaft 20 and the cutter part 30 by interaction with the fastening means 34 of the cutter part 30 to be described later. .

The cutter unit 30 of the present invention countersink cutter 10, as shown in Figs. 4 to 6, is provided with one or more cutting edges 31 on the lower side, the other end of the rotation shaft 20 in the center The coupling hole 32 to be inserted is formed.

In this case, the cutter part 30 is technically characterized in that, as shown, a fastening means 34 protruding inwardly, that is, toward the coupling hole 32, is provided on an inner circumferential surface thereof.

A fastening means formed of an elongated cylindrical pin by forming a fastening hole 33 on one side of the cutter part 30 and passing through the cutter part 30 but also a part of the coupling hole 32 By inserting (34), a part of the fastening means (34) is configured to partially protrude toward the coupling hole (32).

At this time, the fastening means 34 made of the cylindrical pin may be configured in a variety of cylindrical shapes, such as a cylindrical shape, a square cylindrical shape, but is preferably made of a cylindrical shape.

The rotation shaft 20 is inserted into the cutter unit 30 configured as mentioned above to form the countersink cutter 10 of the present invention, the fastening means 34 protruding to the inside of the cutter unit 30 Therefore, when the rotation shaft 20 is inserted into the cutter unit 30, it can be inserted only when it is aligned in a specific direction.

That is, as shown in (a) of FIG. 7, the fastening means 34 of the cutter part 30 and the cut-out part 21 of the rotation shaft 20 must be aligned in parallel to enable complete insertion. Of course, this operation is not difficult for the operator, and if the rotation shaft 20 is moved from side to side in a state roughly aligned with the cutter unit 30, it will be inserted deeply and completely by itself when aligned in a state as shown in Fig. 7(a). Done.

As shown in Fig. 7 (a), when the rotation shaft 20 is inserted into the cutter unit 30, the cutter unit 30 is rotated in the direction of arrow A in the order of Figs. 7(b) and (c) By doing so, the fastening means 34 located at the lower end of the cutout 21 moves to the fastening groove 22 as shown in FIGS. 2 and 3. As a result, the fastening means 34 is constrained by the fastening groove 22 and is continuously constrained to the rotation shaft 20 without being separated from the rotation shaft 20 to rotate together with the rotation shaft 20.

At this time, the direction in which the fastening groove 22 is formed should be formed in a direction opposite to the rotation direction of the rotation shaft 20. That is, in order to form a counter sink by processing the structure, the counter sink cutter must be rotated. At this time, the rotation shaft 20 rotates in the direction of the arrow B, as shown in FIG. 7. Therefore, in order to prevent the cutter part 30 from being separated from and separated from the rotation shaft 20 during the countersink processing operation, the fastening groove 22 is moved from the cutout part 21 to the direction opposite to the rotation direction B. It must be formed. Only in this configuration, the fastening means 34 is continuously tightly constrained to the fastening groove 22 during rotation so that the cutter part 30 does not deviate from the rotation shaft 20.

In order to process a new countersink after the processing operation, when moving the countersink cutter 10 to an adjacent coupling member fastening hole, the operator simply grabs the cutter unit 30 with his or her hand. If only a predetermined angle is rotated in the opposite direction to (a) of FIG. 7, it is easily detachable.

On the other hand, the length of formation of the fastening groove 22 is not particularly limited, but preferably, the fastening is completed when it is rotated about 90° in the state (a) of FIG. 7, that is, in the state (c) of FIG. 7. To be able to be, it is preferable to form the fastening groove 22 as shown in FIG. 3.

Due to the simple coupling and separation operation of the cutter unit 30 as described above, there is an advantage in that the working time and effort are drastically reduced.

On the other hand, as another embodiment of the fastening means 34, it is not a fastening means formed of a long cylindrical pin as in the above embodiment, but is not shown, but is made in a ball shape, so that the inner peripheral surface of the cutter part 30 In the case where it is provided to protrude toward the coupling hole 32 is not excluded. It goes without saying that the ball-shaped fastening means may have a spherical shape or a batted ball type.

In addition, as shown in FIG. 8, it is preferable that a passage 25, which is a passage through which cutting oil or air supplied from the processing apparatus is conveyed, is formed inside the rotation shaft 20. When the cutting edge 31 of the cutter part 30 performs a cutting operation, cutting oil or air supplied from the processing device through the flow path 25 is transferred to the cutting edge 31 to be supplied to the cutting edge 31 While cooling the cutting edge 31, a smooth machining operation is performed.

The flow path 25 extends from one end of the rotation shaft 20 and communicates with the outside of the side surface of the other end of the rotation shaft 20 to which the cutter unit 30 is coupled. Of course, one end of the rotary shaft 20 is communicated with the outside to receive cutting oil or air supplied from the processing device.

The flow path 25 has one or more outlets formed outside the side surface of the other end of the rotary shaft 20 to communicate with the outside to discharge cutting oil or air supplied from the processing device to the outside, and the location of the outlet is the It is preferable to be the front of the cutting edge (31). Although not shown, referring to FIG. 1, when the cutter part 30 is coupled to the rotation shaft 20, the rotation shaft 20 in the space portion in front of the position of the cutting edge 31 It is preferable that the outlet is formed on the surface. This is because cutting oil or air must be supplied slightly in front of the cutting edge 31 when rotating during the countersink processing operation to create optimal processing conditions.

In the above, the description has been limited to the preferred embodiments of the present invention, but this is only an example, and the present invention is not limited thereto and may be changed and implemented in various ways, and further, a separate technical feature is provided based on the disclosed technical idea. It will be obvious that it can be added and implemented.

10: countersunk cutter 20: rotating shaft
21: cutout 22: fastening groove
25: euro 30: cutter unit
31: cutting edge 32: coupling hole
33: fastening hole 34: fastening means

Claims (3)

A cylindrical rotating shaft 20 having one end fastened to the processing device and rotating;
A cutout portion 21 formed in a shape cut so that a part of the outer circumferential surface becomes a flat plane by a predetermined length starting from the end of the other end of the rotation shaft 20;
A fastening groove 22 that begins at the lower end of the cutout 21 and is concavely extended to a predetermined length along the circumference of the outer circumferential surface of the rotation shaft 20;
A cutter part 30 in which a coupling hole 32 into which the other end of the rotation shaft 20 is inserted is provided in the center, and at least one cutting edge 31 is mounted at a lower side thereof;
Consisting of a cylindrical pin, the cylindrical pin is inserted into a fastening hole 33 formed to penetrate one side of the cutter part 30 and a part of the coupling hole 32, and the cutter part 30 A fastening means 34 installed to protrude toward the coupling hole 32 on the inner circumferential surface of the );
Consists of including,
After inserting the rotation shaft 20 into the coupling hole 32 of the cutter part 30 so that the fastening means 34 moves along the cutout part 21, the cutter part 30 Countersunk cutter, characterized in that by rotating with respect to the rotation shaft (20) so that the fastening means (34) is inserted into the fastening groove (22), thereby fastening the cutter unit (30) and the rotation shaft (20). The method of claim 1,
The fastening means 34,
Instead of a cylindrical pin, a countersink cutter, characterized in that it is constructed of a spherical or ball-shaped ball, and is configured to protrude toward the coupling hole (32). The method according to claim 1 or 2,
Inside the rotation shaft 20,
A flow path 25 is formed that extends from one end of the rotation shaft 20 and communicates with the outside, and communicates with the outside of the side of the other end of the rotation shaft 20 to which the cutter unit 30 is coupled, and the flow path 25 ) When the cutting oil or air supplied from the processing device is conveyed and the cutting edge 31 of the cutter unit 30 performs a cutting operation, supplying the cutting oil or air.

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