KR20130044541A

KR20130044541A - Cutting tool

Info

Publication number: KR20130044541A
Application number: KR1020110108655A
Authority: KR
Inventors: 이정수
Original assignee: (주)예스툴
Priority date: 2011-10-24
Filing date: 2011-10-24
Publication date: 2013-05-03

Abstract

PURPOSE: A cutting tool is provided to save a product cost by being replaced with a new main body after separating a damaged main body from a handle holder when the main body is damaged. CONSTITUTION: A cutting tool comprises a connection unit(12) in the rear end of a main body(10) in which a cutting blade(11) is formed. A coupling hole(14) is formed in the center of the rear end surface(13) of the connection unit. The connection unit of the main body is inserted into a coupling groove(21) of a handle holder(20). A middle diaphragm(23) is arranged between the coupling groove and a hollow(22). A penetration hole(24) is formed in the middle diaphragm. A bolt member(30) is inserted into the hollow of the handle holder. A spiral coupling unit(31) of the bolt member is coupled with the coupling hole of the main body through the penetration hole.

Description

Cutting tool {CUTTING TOOL}

The present invention relates to a cutting tool such as a drill, an end mill, a tap, a reamer, etc. More specifically, a connection part is formed at the rear end of the main body, and a fastening hole is formed at the center of the rear end, so that the connection part of the main body is connected to one end of the bag holder. A cutting tool is inserted, and the bolt member is inserted into the other end of the bag holder and the bolt member is fastened to the fastening hole of the main body.

Republic of Korea Utility Model Registration No. 20-0401040 (registered November 4, 2005) "milling cutter" is introduced.

The milling cutter has a spiral portion formed on the upper side of the coupling hole drilled in the lower part of the shank, the spiral portion is formed on the upper side of the central axis of the cutter body is fixed to the cemented carbide tip is screwed to the spiral portion of the central shaft screw portion of the coupling hole A tapered inclined surface is formed in the central axis to decrease the diameter toward the top, and a tapered inclined groove is formed in the coupling hole to decrease in diameter toward the top, and screw the spiral portion of the central axis to the spiral portion of the coupling hole. When the inclined surface of the central axis is in close contact with the inclined groove of the coupling hole is to prevent the tolerance (公差) occurs.

The conventional milling cutter as described above has the advantage that the cutter body can be replaced in the shank when the cutter body is broken, thereby lowering the production cost of the product.

However, the milling cutter as described above requires a tolerance for screwing in order to fasten the spiral portion of the coupling hole and the spiral portion of the cutter body, so that the relative vibration of the shank with respect to the cutter body occurs when cutting the workpiece. There is a structural disadvantage.

Accordingly, an object of the present invention is to form a connecting portion at the rear end of the main body, a fastening hole is formed at the center of the rear end, the connecting portion of the main body is fitted to one end of the bag holder, the bolt member is inserted into the other end of the bag holder, It is fastened to the fastening hole of the main body, and the bolt member pulls the main body of the main body in the axial direction, thereby providing a cutting tool that is firmly connected to the main body of the main body and prevents the main body from vibrating relative to the main bag holder. It is.

One example of the cutting tool according to the present invention for achieving the above object is a connecting portion is formed in the rear end of the main body is formed with a cutting edge, a fastening hole is formed in the center of the rear end surface of the connecting portion, the connection of the main body is coupled to the bag holder It is fitted in the groove, the middle diaphragm is disposed between the coupling groove and the hollow portion of the bag holder, the through-hole is formed in the middle diaphragm, the bolt member is introduced into the hollow portion of the bag holder, the spiral fastening portion of the bolt member of the bag holder It is characterized in that it is fastened to the fastening hole of the body through the through hole.

The body is characterized in that any one of a drill, end mill, tap tool, reamer and T-cutter.

The connecting portion of the main body is composed of a straight section with no change in diameter, and a tapered section with a smaller diameter as it goes from the straight section to the rear section, and correspondingly, the coupling groove of the bag holder also has a straight section with no change in the inner diameter, and a straight line. It characterized in that it consists of a slope section in which the inner diameter is reduced toward the middle diaphragm in the section.

A pair of keys are mounted to the coupling groove of the bag holder so as to face each other, and a key groove is formed at the connection portion of the main body to correspond to the key of the coupling groove.

The straight section of the connecting portion of the main body is formed in a polygon, the straight section of the coupling groove of the bag holder is formed in a polygon corresponding to the shape of the straight section of the connecting portion.

The tapered section of the connecting portion of the main body is formed in a polygon, characterized in that the inclined section of the coupling groove of the bag holder is formed in a polygon corresponding to the tapered section of the connecting portion.

Another example of the cutting tool according to the present invention is a connection portion is formed in the rear end of the main body is formed with a cutting edge, a tapered groove is formed in the center of the rear end surface of the connection portion, the expansion portion of the fastening pipe fitted with the head of the bolt is inserted into the tapered groove The connection part of the main body is inserted into the coupling groove of the bag holder, and the bolt and the fastening tube are fitted into the hollow part of the bag holder, so that the nut is inserted into the nut mounting groove opened to the rear end of the bag holder, and the nut is fastened to the bolt. It is characterized by.

The bolt is characterized in that the head portion is formed at one end of the bag portion, the spiral fastening portion is formed at the other end of the bag portion, the circumference of the head portion is formed to be tapered.

The fastening pipe is characterized in that the extension is formed at one end of the straight pipe portion, a pair of expansion pieces are formed to face each other by a pair of cutouts formed in the extension.

A pair of keys are mounted to the coupling groove of the bag holder so as to face each other, and a pair of key grooves are formed at the connection portion of the main body so as to correspond to the keys of the coupling groove.

The connecting portion of the main body is composed of a straight section with no change in diameter, and a tapered section with a smaller diameter as it goes from the straight section to the rear section, and correspondingly, the coupling groove of the bag holder also has a straight section with no change in the inner diameter, and a straight line. Characterized in that it consists of an inclined section of the inner diameter decreases toward the bottom surface of the groove in the section.

As a result, the cutting tool according to the present invention can be used after removing the damaged main body from the bag holder when the main body is damaged, and then replace it with a new main body, thereby reducing the cost of the product. There is an effect that can prevent the relative vibration of the.

1 is an exploded perspective view showing a cutting tool according to a first embodiment of the present invention;
2 is a cross-sectional view of a cutting tool according to a first embodiment of the present invention;
Figure 3 is an exploded cross-sectional view showing a coupling groove of the connecting portion of the main body and the bag holder in the cutting tool according to the first embodiment of the present invention
Figure 4 is an exploded perspective view showing an example in which the coupling groove of the connecting portion of the main body and the bag holder in the cutting tool according to the first embodiment of the present invention is coupled by a key
Figure 5 is a cross-sectional view showing an example in which the coupling portion of the main body and the coupling groove of the bag holder is coupled by the key
6 and 7 are exploded perspective views showing an example in which the coupling portion of the main body formed in the polygonal shape and the coupling groove of the bag holder is coupled
8 is an exploded perspective view showing a cutting tool according to a second embodiment of the present invention;
9 is a cross-sectional view showing a cutting tool according to a second embodiment of the present invention.
10 is a cross-sectional view showing a state in which the tensioning rod is extended and the tensioning rod is caught in the fastening hole of the body;
11 is a perspective view showing a fastening tube
12 is an exploded perspective view showing an example in which the coupling groove of the connecting portion of the main body and the bag holder in the cutting tool according to the second embodiment of the present invention is coupled by a key
13 is a cross-sectional view showing an example in which the coupling portion of the main body and the coupling groove of the bag holder is coupled by the key
14 and 15 are exploded perspective views illustrating an example in which the coupling portion of the main body formed in the polygonal shape and the coupling groove of the bag holder is coupled;

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

1 and 2, in the cutting tool according to the first embodiment of the present invention, a connection part 12 is formed at a rear end of the main body 10 in which the cutting edge 11 is formed, and a rear end surface of the connection part 12 is provided. (13) The fastening hole 14 is formed in the center, the connecting portion 12 of the main body 10 is fitted into the coupling groove 21 of the bag holder 20, the coupling groove 21 of the bag holder 20 An intermediate diaphragm 23 is disposed between the hollow portion 22 and the hollow portion 22, a through hole 24 is formed in the intermediate diaphragm 23, and the bolt member 30 is formed by the hollow portion 22 of the bag holder 20. The spiral fastening portion 31 of the bolt member 30 is fastened to the fastening hole 14 of the main body 10 through the through hole 24 of the bag holder 20.

Thereby, when the bolt member 30 fastened to the fastening hole 14 of the connection part 12 of the main body 10 is tightened, the head part 32 of the bolt member 30 will become the intermediate | middle diaphragm of the bag holder 20. As shown in FIG. The rear end face 13 of the connecting portion 12 of the main body 10 which is pressed against the head 23 and disposed to face the head 32 of the bolt member 30 at the same time is the middle diaphragm 23 of the bag holder 20. ), The spiral fastening portion 31 of the bolt member 30 is pulled in the axial direction as shown by an arrow 35, and the main body 10 fastened to the spiral fastening portion 31 of the bolt member 30. The connection part 12 is also pulled and fixed in the axial direction, thereby preventing the main body 10 from vibrating relative to the bag holder 20 during the cutting of the workpiece.

Although the main body 10 is shown as a drill in FIGS. 1 and 2, the present invention is not limited thereto, and a bag (shank) is fixed to the chuck such as an end mill, a tap tool, a reamer, a T-cutter, and the like. This corresponds to all cutting tools for cutting workpieces while rotating at.

Referring to FIG. 3, the connecting portion 12 of the main body 10 includes a straight section 12a having no change in diameter and a tapered section 12b in which the diameter decreases from the straight section 12a to the rear end surface 13. And correspondingly, the coupling groove 21 of the bag holder 20 also has a straight section 21a having no change in the inner diameter, and an inclined section 21b having a smaller inner diameter from the straight section 21a to the intermediate diaphragm. It is composed of

As a result, when the connecting portion 12 of the main body 10 is fitted into the engaging groove 21 of the bag holder 20, the straight section 12a of the connecting portion 12 is connected to the straight section 21a of the engaging groove 21. ) Corresponds to the inclined section 21b of the coupling groove 21 and the tapered section 12b of the connecting portion 12 corresponds to the bolt fastened to the fastening hole 14 of the connecting portion 12 of the main body 10. When the member 30 is tightened, the inclined section 21b of the coupling groove 21 and the tapered section 12b of the connecting portion 12 are compressed to each other, thereby further strengthening the coupling between the bag holder 20 and the main body 10. .

4 and 5, a pair of keys 25 are mounted in the coupling groove 21 of the bag holder 20 so as to face each other, and correspond to the keys 25 of the coupling groove 21. A pair of key grooves 15 are formed in the connecting portion 12 of the main body 10.

Thereby, when the main body 10 rotates about its center axis X as shown by the arrow 19 of FIG. 5 to cut a workpiece, the main body 10 is a bag holder by the key 25. It becomes possible to prevent relative rotation with respect to (20).

Referring to FIG. 6, in another alternative, the straight section 12a of the connecting portion 12 of the main body 10 is formed in a polygonal shape (hexagonal, octagonal, etc.), and in the shape of the straight section 12a of the connecting portion 12. Correspondingly, the straight section 21a of the coupling groove 21 of the bag holder 20 is formed in a polygon.

As a result, when the main body 10 rotates about its center axis X to cut the workpiece, the straight section 12a of the connecting portion 12 formed in a polygon and the straight section of the engaging groove 21 are formed. The engagement of the 21a makes it possible to prevent the main body 10 from rotating relative to the bag holder 20.

Referring to FIG. 7, in another alternative, the tapered section 12b of the connecting portion 12 of the main body 10 is formed in a polygon (hexagonal shape, octagonal shape, etc.), and the tapered section 12b shape of the connecting portion 12 is formed. Corresponding to the inclined section 21b of the coupling groove 21 of the bag holder 20 is formed in a polygon.

As a result, when the main body 10 rotates about its center axis X to cut the workpiece, the tapered section 12b of the connecting portion 12 formed in a polygon and the inclined section of the engaging groove 21 are formed. The engagement of the 21b makes it possible to prevent the main body 10 from rotating relative to the bag holder 20.

8 to 10, in the cutting tool according to the second embodiment of the present invention, the connecting portion 112 is formed at the rear end of the main body 110 on which the cutting edge 111 is formed, and the rear end surface of the connecting portion 112 is formed. A tapered groove 114 is formed in the center thereof, an extension 131 of the fastening tube 130 in which the head portion 121 of the bolt 120 is fitted into the tapered groove 114 is fitted, and the main body 110 is inserted therein. (112) of the coupling portion 112 is fitted into the coupling groove 141 of the bag holder 140, the bolt 120 and the fastening tube 130 is fitted into the hollow portion 142 of the bag holder 140, The nut 150 is inserted into the nut mounting groove 143 opened to the rear end of the holder 140, and the nut 150 is fastened to the bolt 120.

The cutting tool according to the second embodiment of the present invention configured as described above, when the nut 150 is tightened, the bolt 120 inserted into the fastening tube 130 is the nut (as shown by arrows 160 of FIGS. 9 and 10). The head 121 of the bolt 120 disposed inside the expansion part 131 of the fastening pipe 130 opens the expansion part 131 of the fastening pipe 130 by being moved toward 150, thereby tightening the fastening pipe. The extended portion 131 of the 130 is caught by the tapered groove 114 of the main body 110. As a result, the bolt 120 is pulled in the axial direction as shown by the arrow 160, and the connecting portion 112 of the main body 110 is also pulled in the axial direction and fixed to the engaging groove 141 of the bag holder 140. In the process of cutting the workpiece, the main body 110 may be prevented from vibrating relative to the bag holder 140.

Although the main body 110 is shown as a drill in FIG. 8, the present invention is not limited thereto, while the bag 110 (shank) is rotated while being fixed to the chuck such as an end mill, a tap tool, a reamer, and a T-cutter. This applies to all cutting tools for cutting workpieces.

Referring to FIG. 8 again, the bolt 120 has a head portion 121 formed at one end of the bag portion 122, a spiral fastening portion 123 formed at the other end of the bag portion 122, and a head portion. The perimeter of the 121 is tapered.

Referring to FIG. 11, the fastening pipe 130 has a pair of expansion portions 131 formed at one end of the straight pipe portion 132 and a pair of cutouts 133 formed at the expansion portion 131. The extension pieces 131a and 131b are formed to face each other.

Thereby, as shown in FIG. 9, in the state which the expansion part 131 of the fastening pipe | tube 130 with which the head part 121 of the bolt 120 was fitted was fitted in the taper groove 114 of the heat connection part 112, As shown in FIG. 10, when the bolt 120 is pulled in the direction of the arrow 160 by the nut 150, the pair of extension pieces 131a facing each other with the head 121 of the bolt 120 face each other. 131b is opened and the extension pieces 131a and 131b are caught in the tapered groove 114.

12 and 13, a pair of keys 145 are mounted to the coupling groove 141 of the bag holder 140 to face each other, and correspond to the keys 145 of the coupling groove 141. One key groove 115 is formed in the connecting portion 112 of the main body 110.

Thereby, when the main body 110 rotates about its center axis X as shown by the arrow 119 of FIG. 13 to cut a workpiece, the main body 110 is a bag holder by the key 145. FIG. The relative rotation with respect to 140 can be prevented.

Referring to FIG. 14, the connection part 112 of the main body 110 has a straight section 112a having no change in diameter and a tapered section 112b having a smaller diameter from the straight section 112a to the rear end face 113. And correspondingly, the coupling groove 141 of the bag holder 140 also has a straight section 141a having no change in the inner diameter, and an inclined section having a smaller inner diameter from the straight section 141a toward the bottom of the groove. It consists of 121b.

The straight section 112a of the connecting portion 112 of the main body 110 is formed in a polygon (hexagonal, octagonal, etc.), and the coupling groove of the bag holder 140 to correspond to the shape of the straight section 112a of the connecting portion 112. The straight section 141a of 141 is formed in a polygon.

As a result, when the main body 110 rotates about its center axis X to cut the workpiece, the straight section 112a of the connecting portion 112 formed in a polygon and the straight section of the engaging groove 141 are formed. By combining the 141a, it is possible to prevent the main body 110 from rotating relative to the bag holder 140.

Referring to FIG. 15, in another alternative, the tapered section 112b of the connecting portion 112 of the main body 110 is formed in a polygon (hexagonal shape, octagonal shape, etc.), and the tapered section 112b shape of the connecting portion 112 is formed. To correspond to the inclined section 141b of the coupling groove 141 of the bag holder 140 is formed in a polygon.

Thereby, when the main body 110 rotates about its center axis X to cut the workpiece, the inclined section of the tapered section 112b and the coupling groove 141 of the connecting portion 112 formed in a polygonal shape. By combining the 141b, it is possible to prevent the main body 110 from rotating relative to the bag holder 140.

10: main body 12: connection portion
20: bag holder 21: coupling groove
30: bolt member

Claims

The connection part 12 is formed in the rear end of the main body 10 in which the cutting edge 11 was formed, the fastening hole 14 is formed in the center of the rear end surface 13 of the connection part 12, and the connection part of the main body 10 ( 12 is fitted into the coupling groove 21 of the bag holder 20, the intermediate diaphragm 23 is disposed between the coupling groove 21 and the hollow portion 22 of the bag holder 20, the intermediate diaphragm 23 ), A through hole 24 is formed, the bolt member 30 is introduced into the hollow portion 22 of the bag holder 20, and the spiral fastening portion 31 of the bolt member 30 is the bag holder 20. Cutting tool, characterized in that is fastened to the fastening hole 14 of the main body 10 through the through hole 24 of the.

The method of claim 1,
The main body (10) is a cutting tool, characterized in that any one of a drill, end mill, tap tool, reamer and T-cutter.

The method of claim 1,
The connection part 12 of the main body 10 is composed of a straight section 12a without a change in diameter and a tapered section 12b in which the diameter decreases toward the rear end surface 13 from the straight section 12a. Correspondingly, the coupling groove 21 of the bag holder 20 is also composed of a straight section 21a having no change in the inner diameter, and an inclined section 21b having a smaller inner diameter from the straight section 21a to the middle diaphragm. Cutting tool.

The method of claim 3, wherein
A pair of keys 25 are mounted to the coupling groove 21 of the bag holder 20 so as to face each other, and the connection portion of the main body 10 to correspond to the keys 25 of the coupling groove 21. 12) A cutting tool, characterized in that one key groove (15) is formed.

The method of claim 3, wherein
The straight section 12a of the connecting portion 12 of the main body 10 is formed in a polygon, and the straight section of the coupling groove 21 of the bag holder 20 corresponds to the shape of the straight section 12a of the connecting portion 12. Cutting tool, characterized in that the (21a) is formed in a polygon.

The method of claim 3, wherein
The tapered section 12b of the connecting section 12 of the main body 10 is formed in a polygon, and the inclined section of the coupling groove 21 of the bag holder 20 to correspond to the tapered section 12b of the connecting section 12. Cutting tool, characterized in that the (21b) is formed in a polygon.

The connection part 112 is formed in the rear end of the main body 110 in which the cutting edge 111 was formed, the taper groove 114 is formed in the center of the rear end surface 113 of the connection part 112, and the bolt in the taper groove 114 is formed. The expansion part 131 of the fastening tube 130 into which the head part 121 of the 120 is fitted is fitted, and the connection part 112 of the main body 110 is fitted into the coupling groove 141 of the bag holder 140. By fitting the bolt 120 and the fastening tube 130 to the hollow portion 142 of the bag holder 140, the nut 150 is inserted into the nut mounting groove 143 opened to the rear end of the bag holder 140. Retracted, cutting tool, characterized in that the nut 150 is fastened to the bolt (120).

The method of claim 7, wherein
The main body 110 is a cutting tool, characterized in that any one of a drill, end mill, tap tool, reamer and T-cutter.

The method of claim 7, wherein
The bolt 120 has a head portion 121 formed at one end of the bag portion 122, a spiral fastening portion 123 is formed at the other end of the bag portion 122, the circumference of the head portion 121 is tapered Cutting tool, characterized in that formed fork.

The method of claim 7, wherein
The fastening tube 130 has an extension part 131 formed at one end of the straight pipe part 132, and a pair of extension pieces 131a by a pair of cutouts 133 formed in the extension part 131. 131b) is formed to face each other cutting tool.

The method of claim 7, wherein
A pair of keys 145 are mounted to the coupling groove 141 of the bag holder 140 to face each other, and the connection portion of the main body 110 to correspond to the key 145 of the coupling groove 141. A cutting tool, characterized in that a pair of key grooves (115) are formed in (112).

The method of claim 7, wherein
The connecting portion 112 of the main body 110 is composed of a straight section 112a without a change in diameter and a tapered section 112b in which the diameter decreases toward the rear end face 113 in the straight section 112a. Correspondingly, the coupling groove 141 of the bag holder 140 is also composed of a straight section 141a having no change in the inner diameter, and an inclined section 121b having an inner diameter smaller toward the bottom surface of the groove in the straight section 141a. Cutting tool, characterized in that.

13. The method of claim 12,
The straight section 112a of the connecting portion 112 of the main body 110 is formed in a polygon, and the straight section of the coupling groove 141 of the bag holder 140 corresponds to the shape of the straight section 112a of the connecting portion 112. Cutting tool, characterized in that (141a) is formed in a polygon.

13. The method of claim 12,
The tapered section 112b of the connecting portion 112 of the main body 110 is formed in a polygon, and the inclined section of the coupling groove 141 of the bag holder 140 to correspond to the tapered section 112b of the connecting portion 112. Cutting tool, characterized in that the (141b) is formed in a polygon.