KR102407500B1 - quick change tool - Google Patents

Abstract

In the present invention, the head part 50 having a pin groove 51 recessed on one side of the lower surface, the working sleeve 60 having the inclined cutting part 61 recessed on the upper side, the working sleeve 60 and the head part 50 are A body portion 10 to be inserted and coupled, a plug 70 screwed to the upper portion of the body portion 10 and having a screw portion 71 formed on an outer circumferential surface, and provided between the plug 70 and the operating sleeve 60 and a cam (80) having an upper cam (81) formed thereon, and a lower cam (82) eccentric from the center of the upper cam (81) in the lower portion of the upper cam (81). do.

Description

quick change tool {quick change tool}

The present invention relates to a quick change tool, and more particularly, when the lower cam rotates with respect to the central axis of the upper cam, the outer circumferential surface of the lower cam is in line contact with the inner surface of the cutting part of the actuating sleeve, and the actuating sleeve is It relates to a quick change tool that by moving obliquely in the rear left direction by the lower cam, the operating sleeve and the head are in close contact with the body, thereby reducing the fastening tolerance of the consumable tool.

In general, a machining tool mounted on a production facility includes a block mounted on the chuck of the production facility, a tool holder fastened to a through hole of the block, and a consumable tool that is fastened to the tool holder to process a workpiece.

In order to assemble the machining tool, the consumable tool is first fastened to the screw hole formed on the side of the tool holder, and then the tool holder to which the consumable tool is fastened is inserted into the through hole of the block and fastened. Here, the consumable tool means an insert tip capable of processing a workpiece in a production facility.

If the workpiece is machined over a certain number, the consumable tool can no longer be used due to wear of the consumable tool, and the consumable tool must be replaced periodically.

However, when the vibration occurs intermittently during the cutting process by the machining tool, the tool holder moves forward by a predetermined distance from the block of the machining tool. There was a problem in that the fastening tolerance of the consumable tool increased. Here, the fastening tolerance of the consumable tool means an error between the reference fastening point of the consumable tool and the actual fastening point of the consumable tool.

In addition, when vibration is continuously generated during the cutting process by the machining tool, the tool holder is separated from the block of the machining tool, thereby causing a safety accident.

KR 101368048 B1 KR 1020140085927 A

In order to solve the above technical problems, it is an object of the present invention to make line contact with the inner surface of the cutting part of the operating sleeve when the lower cam rotates with respect to the central axis of the upper cam, and the operation An object of the present invention is to provide a quick change tool that reduces a fastening tolerance of a consumable tool by causing the sleeve to move obliquely to the left rearward by the lower cam, so that the operating sleeve and the head are in close contact with the body.

According to an embodiment of the present invention for solving the above problems, the quick change tool according to the present invention includes a head portion 50 having a pin groove 51 recessed on one side of the lower surface, and a cutting portion 61 inclined at the upper portion. The working sleeve 60 formed in a depression, the body part 10 to which the working sleeve 60 and the head part 50 are inserted and coupled, screwed to the upper part of the body part 10, and a threaded part 71 on the outer circumferential surface It is provided between the formed plug 70 and the plug 70 and the operating sleeve 60 , an upper cam 81 is formed on the upper part, and the upper cam 81 is formed on the lower part of the upper cam 81 . It is characterized in that it includes a cam (80) formed with a lower cam (82) eccentric from the center.

In addition, the body portion 10 has a fixed sleeve 30 having a first pinhole 31 and a second pinhole 32 formed therethrough on one side and the other side, respectively, and the fixed sleeve 30 and the operating sleeve 60 on the front side. ) is inserted through a tapered through-hole 21 , and a third pinhole 24 and a fourth pinhole 25 are recessed on one side and the other side of the lower portion of the through-hole 21 , and the plug is formed on the upper surface The housing 20 through which the fastening hole 22 corresponding to the screw part 71 of (70) is formed, the direction pin 40 press-fitted to the first pinhole 31 and the third pinhole 24, and the second The second pinhole 32 and the fourth pinhole 25 are press-fitted, and the outer side includes a fixing pin 41 that is in close contact with the pin groove 51 of the head part 50, and the cam 80 is operated as described above. After the sleeve 60 is inserted into the through hole 21 of the housing 20, it is inserted into the lower inner side of the fastening hole 22 of the housing 20, and is seated on the cutting part 61, and the After the cam 80 is inserted into the lower inner portion of the fastening hole 22 of the housing 20 , the plug 70 is inserted into the screw portion 71 on the inner upper portion of the fastening hole 22 of the housing 20 . It is characterized in that it is screwed through.

In addition, the cutting part 61 has a first inclined surface 62 on one side inclined in a counterclockwise direction with respect to the cross-section 64 of the operating sleeve 60, and on the first inclined surface 62 on the other side. It is characterized in that the opposite second inclined surface (63) is formed parallel to the first inclined surface (62).

In addition, the distance between the first inclined surface 62 and the second inclined surface 63 is characterized in that formed larger than the diameter of the lower cam (82).

In addition, when the lower cam 82 rotates with respect to the central axis of the upper cam 81, the outer circumferential surface is in line contact with the first inclined surface 62 or the second inclined surface 63 of the cutting part 61, It is characterized in that it rotates clockwise by a vector force in a normal direction perpendicular to the first inclined surface 62 and the second inclined surface 63 .

In addition, the operating sleeve (60) is characterized in that it is in close contact with the through hole (21) by moving obliquely in the rear left direction by the clockwise rotational force of the lower cam (82).

In addition, the housing 20 is characterized in that the inlet hole 23 through which the cutting oil flows into the outer side is formed to be symmetrically and slanted through each other.

In addition, the fixing sleeve 30 is characterized in that the first coolant through-hole 32 corresponding to the inlet hole 23 is formed through the lower inner side.

In addition, in the head part 50, a second coolant through hole 52 corresponding to the inlet hole 23 is formed through the lower outer side, and a discharge hole 53 through which the cutting oil is discharged is formed on the front side. characterized in that

In the quick change tool according to the present invention, when the lower cam rotates with respect to the central axis of the upper cam, the outer circumferential surface of the lower cam is in line contact with the inner surface of the cutting part of the operating sleeve, and the operating sleeve is rearward by the lower cam By moving obliquely to the left, the working sleeve and the head are in close contact with the body, thereby reducing the fastening tolerance of the consumable tool.

In the quick change tool according to the present invention, the head part and the fixed sliver are in close contact with the through-hole of the housing, so cutting oil does not leak to the outside, and there is no need to install a connection nipple to which the cutting oil is supplied, so the head part can be conveniently and quickly It has a replaceable effect.

1 is a perspective view of a quick change tool according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the quick change tool shown in FIG. 1 when viewed from the front.
3 is a plan view for explaining the configuration of the quick change tool shown in FIG.
4 is an exploded perspective view of the quick change tool shown in FIG. 1 when viewed from the rear.
5 is a rear view for explaining the configuration of the quick change tool shown in FIG.
6 is a plan cross-sectional view of the body shown in FIG.
7 is a front cross-sectional view of the body shown in FIG.
8 is a plan view for explaining a process in which the operating sleeve is closely attached to the rear by the cam.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings in order to describe in detail enough that a person of ordinary skill in the art can easily implement the technical idea of the present invention.

However, the following examples are merely examples to help the understanding of the present invention, thereby not reducing or limiting the scope of the present invention. In addition, the present invention may be embodied in several different forms and is not limited to the embodiments described herein.

1 is a perspective view of a quick change tool according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the quick change tool shown in FIG. 1 when viewed from the front, and FIG. 3 is a plan view for explaining the configuration of the quick change tool shown in FIG.

4 is an exploded perspective view of the quick change tool shown in FIG. 1 when viewed from the rear, and FIG. 5 is a rear view for explaining the configuration of the quick change tool shown in FIG. 2 .

6 is a plan sectional view of the body shown in FIG. 2, and FIG. 7 is a front sectional view of the body shown in FIG.

8 is a plan view for explaining a process in which the operating sleeve is closely attached to the rear by the cam.

First, the configuration of the quick change tool according to the present invention will be described.

1 to 5 , the quick change tool according to the present invention includes a head part 50 , an operating sleeve 60 , a body part 10 , a plug 70 , a cam 80 and a consumable tool 90 . is comprised of

Referring to FIG. 4 , a pin groove 51 that is in close contact with the outside of the fixing pin 41 is recessed on one side of the lower surface of the head part 50 . At this time, so that the pin groove 51 can be completely in close contact with the outside of the fixing pin 41 , the inner diameter of the pin groove 51 is formed to be the same as the outer diameter of the fixing pin 41 .

Referring to FIGS. 3 and 8 , the inclined cutting part 61 is recessed in the upper part of the operating sleeve 60 . A first inclined surface 62 is formed on one side of the cutting part 61 to be inclined in a counterclockwise direction with respect to the cross-section 64 of the operating sleeve 60, and a first inclined surface 62 is formed on the other side of the cutting part 61. A second inclined surface 63 opposite to the first inclined surface 62 is formed parallel to the first inclined surface 62 .

In addition, the outer side of the operating sleeve 60 is formed so that the outer diameter decreases from the front to the rear. And, the inner diameter of the operation sleeve 60 is formed to have a certain size so that the outside of the head unit 50 can be in close contact with the inside of the operation sleeve 60 .

And, the lower surface of the body portion 10 is mounted and fixed to the chuck of the production facility, and the operating sleeve 60 and the head portion 50 are inserted and coupled to the through hole 21 formed in the front surface of the body portion 10 .

6 and 7 , the body portion 10 includes a fixing sleeve 30 , a housing 20 , a direction pin 40 , and a fixing pin 41 .

Referring to FIG. 6 , the outer side of the fixing sleeve 30 is formed such that the outer diameter decreases from the front to the rear. And, the inner diameter of the fixed sleeve 30 is formed to a certain size so that the outside of the head portion 50 can be in close contact with the inner side of the fixed sleeve 30 .

Referring to FIG. 6 , a first pinhole 31 is formed through one inner side of the fixed sleeve 30 , and a second pinhole 32 is formed through the other inner side of the fixed sleeve 30 . In this case, the cross-sections of the first pinhole 31 and the second pinhole 32 are formed in a circular shape.

6 and 7, a through hole 21 into which the fixed sleeve 30 and the operating sleeve 60 are inserted is formed in the front surface of the housing 20, and at one lower side of the through hole 21, the first The third pinhole 24 is recessed, and the fourth pinhole 25 is recessed at the other lower side of the through hole 21 . In this case, the through-hole 21 is formed to have an inner diameter that becomes smaller from the front to the rear, and the cross-sections of the third pinhole 24 and the fourth pinhole 25 are formed in a circular shape.

In addition, a fastening hole 22 corresponding to the screw portion 71 of the plug 70 is formed through the upper surface of the housing 20 . At this time, in the fastening hole 22 , the female screw is inclinedly depressed along the inner circumferential surface of the fastening hole 22 .

2 and 6 , the direction pin 40 is press-fitted to the first pinhole 31 of the fixed sleeve 30 and the third pinhole 24 of the housing 20 . At this time, the direction pin 40 is formed in the shape of a cylinder having a predetermined diameter.

When the head part 50 is inserted into the through hole 21 of the housing 20, the direction pin ( 40) is formed to protrude from the first pinhole 31 of the fixed sleeve 30 to 1.0 to 1.5 mm.

1 and 6 , the fixing pin 41 is press-fitted to the second pinhole 32 of the fixing sleeve 30 and the fourth pinhole 25 of the housing 20 , The outside is in close contact with the pin groove 51 of the head unit 50 .

2 and 4 , the plug 70 is screwed onto the upper portion of the body 10 . In addition, a screw portion 71 corresponding to the fastening hole 22 of the housing 20 is formed on the outer peripheral surface of the plug 70 . At this time, the plug 70 is formed in the shape of a cylinder having a predetermined height, and the male screw protrudes obliquely along the outer circumferential surface of the plug 70 in the screw portion 71 .

2 and 4 , the cam 80 is provided between the plug 70 and the operating sleeve 60 . In addition, an upper cam 81 is formed on the upper portion of the cam 80 , and a lower cam 82 eccentric from the center of the upper cam 81 is formed on the lower portion of the upper cam 81 . At this time, the upper cam 81 and the lower cam 82 are formed in a cylindrical shape, and the diameter of the lower cam 82 is smaller than the diameter of the upper cam 81 .
On the other hand, the cam 80 is inserted into the lower inner side of the fastening hole 22 of the housing 20 after the operation sleeve 60 is inserted into the through hole 21 of the housing 20, the operation sleeve 60 is seated on the cutting part 61 of the
Then, after the cam 80 is inserted into the lower inner portion of the fastening hole 22 of the housing 20 , the plug 70 is inserted through the screw portion 71 on the inner upper portion of the fastening hole 22 of the housing 20 . screwed together

First, after the cam 80 is inserted into the fastening hole 22 of the housing 20 and the plug 70 is coupled to the fastening hole 22 , the plug 70 becomes the cam 80 and the fastening hole 22 . ) serves to limit the position of the cam 80 so as to be disposed between the cutting portion 61 of the operating sleeve 60 and the lower surface of the plug 70 without departing from the vertical direction (x-axis direction).

On the other hand, the first hexagonal hole 72 is formed through the center of the upper surface of the plug 70 , and the second hexagonal hole 83 corresponding to the first hexagonal hole 72 is formed through the center of the upper surface of the cam 80 . do. By inserting a wrench into the first hexagon hole 72 and the second hexagon hole 83 and rotating the wrench, the plug 70 and the cam 80 may be separated or assembled from the housing 20 .

On the other hand, the consumable tool 90 is an insert tip screwed to the head portion 50 to process the workpiece.

Next, a process of introducing and discharging cutting oil in the quick change tool according to the present invention will be described.

Referring to FIGS. 6 and 7 , a plurality of inlet holes 23 through which cutting oil is introduced are formed through the outer side of the housing 20 to be inclined symmetrically from side to side. At this time, the inlet hole 23 is formed in the shape of a cylinder with an empty inside. At this time, the angle between the central axis and the y-axis of the inlet hole 23 is formed between 40 to 50 degrees. Here, the direction of the y-axis is the same as the direction from the right side of the housing 20 to the left side of the housing 20 .

A plurality of first coolant through-holes 32 corresponding to the inlet holes 23 are formed through the lower inner side of the fixed sleeve 30 to be inclined symmetrically from side to side. At this time, the first coolant through-hole 32 is formed in the shape of a cylinder with an empty inside.

4 and 5 , in the lower outer side of the head part 50 , the second coolant through hole 52 corresponding to the first coolant through hole 32 and communicating with one side of the discharge hole 53 is left and right. A plurality of symmetrically inclined and formed through, and a discharge hole 53 through which the cutting oil is discharged is formed in front of the head portion 50 . At this time, the discharge hole 53 is formed to be elongated in the longitudinal direction along the central axis of the head unit 50 , and the discharge hole 53 and the second coolant through hole 52 are formed in the shape of a cylinder with an empty inside.

The coolant flowing into the inlet hole 23 of the housing 20 passes through the first coolant through hole 32 of the fixed sleeve 30 and the second coolant through hole 52 of the head portion 50, It is discharged to the outside through the discharge hole 53 of (50). In this way, when the cutting process is performed using the cutting oil, heat generated from the head unit 50 , the consumable tool 90 , and the cutting surface of the workpiece can be cooled.

Therefore, in the quick change tool according to the present invention, the head part 50 and the fixed sleeve 30 are completely in close contact with the through hole 21 of the housing 20, so that not only does the coolant not leak to the outside, but also the coolant flows into the head part It is discharged directly toward the front of the 50 and the consumable tool 90 . In addition, in the quick change tool according to the present invention, there is no need to install a connection nipple to which the cutting oil is supplied, and there is an advantage that the head part 50 can be replaced simply and quickly.

Next, a process in which the operation sleeve 60 moves by the operation of the cam 80 will be described.

Referring to FIG. 8 , when the plug 70 and the cam 80 are fastened to the fastening hole 22 of the housing 20 , the outer peripheral surface of the lower cam 82 is cut based on the central axis of the upper cam 81 . It is in line contact with the first inclined surface 62 or the second inclined surface 63 of the part 61 and rotates in a clockwise or counterclockwise direction.

Specifically, the distance between the first inclined surface 62 and the second inclined surface 63 of the cutting part 61 is formed to be larger than the diameter of the lower cam 82 , and the lower cam 82 is the first of the cutting part 61 . In the space between the inclined surface 62 and the second inclined surface 63 , the upper cam 81 may rotate in a clockwise or counterclockwise direction based on the central axis of the upper cam 81 .

Then, the operating sleeve 60 is moved obliquely in the rear left direction by the clockwise rotational force of the lower cam 82 , so that it is in close contact with the through hole 21 .

Specifically, the lower cam 82 rotates clockwise, and the outer circumferential surface of the lower cam 82 is in line contact with the second inclined surface 63 of the cutting part 61, thereby moving the operating sleeve 60 in the rear left direction. will be moved

Referring to FIG. 8 , Fs is a departure force due to an external force initially applied to the operating sleeve 60 , and Fc is a pressing force initially applied to the cam 80 by the operating sleeve 60 .

Here, the direction of Fs coincides with the direction of the z-axis, and the direction of Fc is perpendicular to the second inclined surface 63, and coincides with the direction rotated by α degrees counterclockwise with respect to the z-axis. In this case, the direction of the z-axis is the same as the direction from the rear surface of the head part 50 to the front surface of the head part 50 , that is, the longitudinal direction of the head part 50 .

As a result, the resultant force applied to the actuating sleeve 6 becomes Fr, which is the vector sum of the departure force Fs initially applied to the actuating sleeve 60 and the force Fc thereby applied to the cam 80 .

In other words, Fr becomes the vector sum of Fs and Fc according to the law of parallelograms. In this case, the size of Fr is larger than the sizes of Fs and Fc, and the inclination angle of Fr is smaller than the inclination angle of Fc.

When the cam 80 rotates due to vibration during the cutting process, the first inclined surface 62 and the second inclined surface are attached to the lower cam 82 rotating in the space between the first inclined surface 62 and the second inclined surface 63 . A vector force in the normal direction perpendicular to (63) is applied.

For this reason, as the center of the lower cam 82 moves from the center of the upper cam 81 to the rear left direction, the lower cam 82 rotates clockwise.

For this reason, the lower cam 82 applies a force opposite to the separation force applied to the actuating sleeve 60 to the second inclined surface 63, so that the actuating sleeve 60 is inclined to the rear left direction.

Through this process, the operating sleeve 60 is completely in close contact with the through hole 21 and does not separate from the housing 20 .

In the quick change tool according to the present invention, when the lower cam rotates with respect to the central axis of the upper cam, the outer circumferential surface of the lower cam is in line contact with the inner surface of the cutting part of the operating sleeve, and the operating sleeve is rearward by the lower cam By moving obliquely to the left, the operating sleeve and the head are in close contact with the body, thereby reducing the fastening tolerance of the consumable tool.

In the quick change tool according to the present invention, the head part and the fixed sliver are in close contact with the through-hole of the housing, so cutting oil does not leak to the outside, and there is no need to install a connection nipple to which the cutting oil is supplied, so the head part can be conveniently and quickly It has the advantage of being interchangeable.

As described above, the present invention has a main technical idea to provide a quick change tool, and the embodiment described above with reference to the drawings is only one embodiment, and the true scope of the present invention is defined in the claims. However, it will be said that it extends to equivalent embodiments that may exist in various ways.

10: body 20: housing
21: through hole 22: fastening hole
23: inlet hole 24: third pinhole
25: fourth pinhole 30: fixed sleeve
31: first pinhole 32: second pinhole
33: first coolant through hole 40: direction pin
41: fixing pin 50: head part
51: pin groove 52: second coolant through hole
53: discharge hole 60: operating sleeve
61: cutting part 62: first inclined surface
63: second inclined plane 64: cross section of the operating sleeve
70: plug 71: threaded part
72: first hexagonal hole 80: cam
81: upper cam 82: lower cam
83: second hexagonal hole 90: consumable tool

Claims (5)

a head portion 50 having a pin groove 51 recessed on one side of the lower surface;
an operating sleeve 60 having an inclined cutting part 61 recessed thereon;
a body portion 10 to which the operating sleeve 60 and the head portion 50 are inserted and coupled;
a plug 70 screwed to the upper portion of the body 10 and having a screw portion 71 formed on an outer circumferential surface thereof; and
The lower cam is provided between the plug 70 and the operating sleeve 60, the upper cam 81 is formed on the upper part, and the lower cam eccentric from the center of the upper cam 81 at the lower part of the upper cam 81. A quick change tool comprising a; cam (80) having (82) formed thereon. The method of claim 1,
The body part 10 is
a fixing sleeve 30 having a first pinhole 31 and a second pinhole 32 formed therethrough on one side and the other side, respectively;
A tapered through-hole 21 into which the fixed sleeve 30 and the operating sleeve 60 are inserted is formed in the front surface, and a third pinhole 24 and a fourth a housing 20 in which a pinhole 25 is recessed and a fastening hole 22 corresponding to the screw portion 71 of the plug 70 is formed through an upper surface thereof;
a direction pin 40 press-fitted to the first pinhole 31 and the third pinhole 24; and
and a fixing pin 41 press-fitted to the second pinhole 32 and the fourth pinhole 25, the outside of which is in close contact with the pin groove 51 of the head part 50;
The cam 80 is
After the operating sleeve 60 is inserted into the through hole 21 of the housing 20, it is inserted into the lower inner side of the fastening hole 22 of the housing 20, and is seated on the cutting part 61, ,
The plug 70 is
After the cam 80 is inserted into the lower inner portion of the fastening hole 22 of the housing 20, it is screwed to the inner upper portion of the fastening hole 22 of the housing 20 through the screw portion 71. A quick change tool, characterized in that. The method of claim 1,
The cutting part 61 is
A first inclined surface 62 on one side is inclined counterclockwise with respect to the cross-section 64 of the operating sleeve 60, and a second inclined surface 63 opposite to the first inclined surface 62 on the other side. It is formed parallel to the first inclined surface 62,
The distance between the first inclined surface 62 and the second inclined surface 63 is
A quick change tool, characterized in that it is formed larger than the diameter of the lower cam (82). The method of claim 1,
The lower cam 82 is
When the upper cam 81 is rotated based on the central axis, the outer peripheral surface is in line contact with the first inclined surface 62 or the second inclined surface 63 of the cutting part 61, and the first inclined surface 62 and the second inclined surface 2 rotates clockwise by a vector force in the normal direction perpendicular to the inclined surface 63,
The operating sleeve 60 is
The quick change tool, characterized in that it is in close contact with the through hole (21) by moving obliquely in the rear left direction by the clockwise rotational force of the lower cam (82). 3. The method of claim 2,
The housing 20 is
Inlet holes 23 through which cutting oil is introduced are formed to be symmetrically and slanted through each of the external one side,
The fixing sleeve 30 is
A first coolant through hole 32 corresponding to the inlet hole 23 is formed through the lower inner side,
The head part 50 is
A quick change tool, characterized in that a second coolant through hole (52) corresponding to the inlet hole (23) is formed through the lower outer side, and a discharge hole (53) through which the coolant is discharged is formed through the front surface.

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