KR20170036215A

KR20170036215A - Holder for cutting tool

Info

Publication number: KR20170036215A
Application number: KR1020150135108A
Authority: KR
Inventors: 김현래
Original assignee: 김현래
Priority date: 2015-09-24
Filing date: 2015-09-24
Publication date: 2017-04-03
Also published as: KR101879482B1

Abstract

The present invention relates to a fixing holder for mounting a cutting tool, and more particularly, it is possible to easily remove and mount only a cutting tool that needs to be replaced in order to perform abrasion or various machining operations during a cutting operation, The present invention relates to a fixed holder for a cutting tool in which a zero point adjustment of a cutting tool can be performed in the same working position as a cutting position of the cutting tool before the replacement.
To this end, it is constituted by a holder body bar, a head body, a holder head part composed of a fixed part and a movable part, whereby it is possible to quickly and easily replace only the cutting tool which is worn or replaced, It can be fixed in a position protruding in an appropriate length to increase the work efficiency and can easily replace the unskilled worker. Also, the ease of work can be increased, and the processing cost can be reduced with only a minimum amount of tools and manpower, .

Description

{Holder for cutting tool}

The present invention relates to a fixing holder for mounting a cutting tool, and more particularly, it is possible to easily remove and mount only a cutting tool that needs to be replaced in order to perform abrasion or various machining operations during a cutting operation, The present invention relates to a fixed holder for a cutting tool in which a zero point adjustment of a cutting tool can be performed in the same working position as a cutting position of the cutting tool before the replacement.

In general, a lathe is a machine tool that is the first to be developed, which is capable of machining a rotating workpiece with a cutting tool and mainly machining an outer diameter or an inner diameter of an annular object.

In recent years, it has been developed as an automated CNC lathe, reducing the consumption of manpower to a minimum and automatically machining to the set dimensions set by the program. The process of machining an axis or a pin with such an automatic CNC lathe, The outer diameter surface is precisely machined by a cutting tool and then cut by a cutting tool to a set dimension.

As a cutting tool used in such a lathe, a bite is mainly used, and such a bite is attached with a bite tip at the shank end of a square rod so that it can be easily assembled to a lathe.

Referring to Figure 1, such a bite 10 is mounted on a fastening block 2 which is fixed to the tool rest 1 and holds the working position, which fastener block 2 has a bite 10 shank And fastened or tightened with a fastening bolt (3) to securely fix the working position of the cutting tool (10).

On the other hand, the bite 10 is subjected to a large load when the workpiece is machined and is easily worn. At this time, the fastening block 2 and the bite 10 are supported and integrated with a strong force by fastening the bolts to facilitate the machining operation.

Therefore, it takes a lot of force to loosen the fixed force when the bite 10 is worn and replace the bite 10, which is troublesome.

Various types of bite 10 can be used depending on the workpiece during the cutting operation or during the continuous work process. When the bite 10 needs to be replaced, the position of the fastened block 2 once adjusted is adjusted In order to equalize the zero point of the machining operation using the bite 10, that is, the center point position of the bite tip with respect to the workpiece, there is a problem that requires a lot of experience of a skilled worker or a separate mechanical device for holding a precise position.

Further, when the shape of the workpiece is changed, the bite 10 must be changed according to the job. Therefore, frequent replacement work of the bite 10 causes a problem that the fastening force is reduced and the machining efficiency is lowered.

On the other hand, the operation of fixing the bite 10 in the lathe operation is usually performed manually, in which the bite 10 should be fixed in a state of protruding to an appropriate length from the end of the fastening block 2 for the machining operation .

The protruding length of the bite 10 was determined by the operator's neck or using a separate measuring instrument.

Since the method of installing the bite 10 depends on the skill of the operator, it often occurs that the bite 10 can not be installed properly. When the bite 10 protrudes too much or protrudes too small, Or a precise machining position adjustment for the workpiece, that is, the workpiece can not be adjusted due to the zero point, which makes it difficult to work the lathe.

This resulted in increased processing time and lowering of work efficiency, and the increase in overall wages and production costs was accompanied by the need for skilled workers.

In order to solve such a problem, it has been attempted to solve the problem by changing the shank portion of the bite as in Patent Document 1, or solving the problem by a holder as in Patent Document 2. However, it is not easy to replace the work, A very difficult problem is still being derived.

Korean Registered Patent No. 10-0676501 (registered on January 24, 2007) Korean Utility Model Registration No. 20-0166581 (registered on October 27, 1999)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fixed holder for a cutting tool which is configured to be able to quickly and easily replace a cutting tool which is worn or changed according to various working processes.

It is also an object of the present invention to provide a fixing holder for a cutting tool which is easy to remove and mount using a fastening bolt and which can be positioned at the same processing position as the cutting position of the cutting tool before replacement.

In addition, it is an object of the present invention to provide a fixed holder for a cutting tool which is configured such that the bite can always be fixedly protruded in an appropriate position in a correct position during a replacement operation, thereby increasing work efficiency and enabling easy replacement of unskilled workers .

In order to accomplish the above object, according to the present invention, there is provided a holder for a cutting tool, comprising: a holder body having a length; and a holder head disposed at an end of the holder body and fastening the cutting tool.

At this time, the holder head portion includes a head body on which the bite is seated on the upper surface; And a movable bar integrally formed with the head body and having a protruding fixing jaw and a movable jaw having a movable jaw which is detachably coupled to a position corresponding to the fixing jaw.

Then, the position of the movable tank is changed and the shank of the bite located inside the movable tank and the movable tank is tightly fixed.

Preferably, the head body forms an inner through hole, and the fixing bar forms a wrench bolt hole communicating with the inner through hole. The movable bar forms a bolt hole at a position where the movable bar can communicate with the inner through hole, The wrench bolt, which is inserted through the bolt hole and passes through the inner through hole and the bolt hole, tightens the movable tank toward the head body according to the operation.

The fixed jaw and the movable jaw have an acute slope with respect to the upper surface of the head body.

It is preferable that the movable body side lower side of the head body has an inclined curved surface and the contact surface portion of the movable tank which contacts the inclined curved surface has an inclined inclined surface.

On the other hand, a zero point protrusion protruded toward the head body side is formed in the fixing tank and / or the moving tank, if necessary, and a zero point groove having a size corresponding to the zero point protrusion is formed on one side of the shank.

In addition, if necessary, a stopper for limiting the position of the shank end of the bite to be mounted is formed on the holder body bar. Preferably, the stopper is formed to penetrate the fastening hole, Grooves are formed so that the gap between the stopper and the bite is minimized by the engagement of the tightening member.

As described above, the fixed holder for a cutting tool according to the present invention has the effect of quickly and easily replacing only cutting tools that are worn or replaced.

In addition, since the cutting tool can be easily mounted and dismounted using the fixed and movable tanks, various types of cutting tools can be easily and unskilled depending on the required work process for the workpiece without requiring much effort.

In addition, the cutting tool can always be fixed in a correct position and protruded in an appropriate length at the time of replacement work, thereby increasing the working efficiency.

In addition, the convenience of the work is increased, and the processing cost is reduced by only a minimum amount of tools and manpower, thereby reducing the overall unit cost.

1 is a schematic view showing a state in which a bite according to the prior art is mounted;
2 is a perspective view showing a fixing holder for a cutting tool to which a bite is fixed according to the present invention;
3 is an exploded perspective view showing a fixing holder for a cutting tool according to the present invention;
4 is a cross-sectional view showing a cross-section of the AA portion according to Fig. 3;
5 (a) and 5 (b) are perspective views showing adjustment of a zero point position of a fixture holder for a cutting tool according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

3 is an exploded perspective view showing a fixing holder for a cutting tool according to the present invention, and Fig. 4 is an exploded perspective view showing a portion AA of the cutting tool according to the present invention. Fig. 2 is a perspective view showing a fixing holder for a cutting tool, Fig.

In the embodiment of the present invention, the cutting tool is mainly described with the bite, but the present invention is not limited thereto. The present invention can be applied as long as it can be used as a cutting tool mounted on a fixed holder such as a cutter or a drill.

As shown in the drawing, the fastener holder 100 for a cutting tool according to the present invention facilitates the removal and mounting of the bite 10 composed of the shank 10b and the bite tip 10a, It is constituted so as to be able to control the accurate machining operation of the workpiece, that is, to easily control the zero point.

To this end, the fixing holder 100 for a cutting tool is fixed to a tool holder and mounted on a clamping block or a holder for holding a working position so that its position is always fixed. The holder holder body bar 100a, And a holder head portion 100b for fastening the bite 10 by tightening.

At this time, the holder body bar 100a has a bar shape having a length, and preferably has a rectangular column shape that can be easily fixed. When the holder body bar 100a is mounted on the fastening block and can be easily fixed, It can be changed into the shape of a prism.

The holder head part 100b is integrally formed with the holder body bar 100b and is formed at one end side of the holder body bar 100a to fasten the bite 10 and fix the bite 10, (10b) can be firmly fixed, and the bite (10) can be easily removed and mounted as needed.

Preferably, the holder head portion 100b is formed to protrude above the end portion of the holder body bar 100a. Such a protruding structure facilitates the removal and mounting of the bite 10, It is not disturbed by other structures.

3 and 4, the holder head 100b includes a head body 110 and a fixed body 120 integrally formed with the head body 110, And a movable tank 130 that substantially tightens the bite 10 to a position corresponding to the bite 10.

At this time, the head body 110 has a size such that the shank 10b of the bite 10 can be seated on the upper surface 111 at the center which is the main axis of the holder head part 100b, And is configured to protrude upward on one end of the holder body bar 100a to facilitate removal and mounting.

The width of the upper surface 111 of the head body 110 is preferably equal to or greater than the width of the shank 10b of the bite 10 to be slidably mounted.

The fixture 120 is engaged with the shank 10b of the bite 10 and supports and fixes the shank 10b. The fixture 120 is formed integrally with the head body 110, And has a protruding fixing protrusion 121 for increasing the fixing force.

The movable tank 130 is detachably coupled to one side of the head body 110 by engaging with the shank 10b of the bite 10 together with the fixture 120 and supporting and fixing the shank 10b.

The movable jaw 130 has a movable jaw 131 coupled to the fixing jaw 120 at a position corresponding to the fixing jaw 120 and protruding upward to correspond to the fixing jaw 121.

The fixed holder 100 for a cutting tool according to the present invention having the above-described structure is provided with an upper surface 111 of the head body 110, that is, between the fixing tank 120 and the movable tank 130, The user moves the movable jaw 130 to vary the position of the shank 10b located inside the jaws 10a and 10b and moves the jaws 10b by the fixing jaws 121 and the movable jaws 131, Prevent detachment and fix it firmly.

The movable tank 130 is detachably coupled to the head body 110 by tightening members so as to transmit tight tightening force to the head body 110. The wrench B is preferably used as a tightening member.

In detail, the head body 110 forms an internal through hole 112 with a size that allows the wrench bolt B to pass therethrough.

The fixing barrel 120 is integrally formed at one side of the head body 110 and communicates with the internal through hole 112 so that the wrench bolt hole 122 can be inserted .

The movable tank 130 is positioned on the other side of the head body 110 corresponding to the position of the fixing tank 120 and is connected to the bolt hole And a thread corresponding to the thread of the wrench bolt (B) is formed on the inner side of the bolt hole (132).

The fixing holder 100 for a cutting tool having the above configuration inserts the wrench bolt B through the wrench bolt hole 122 of the fixing barrel 120 and the wrench bolt B is inserted into the inner through hole 112 And is located inside the bolt hole 132 of the movable jaw 130. As shown in Fig.

The movable jaw 130 is tightened to the head body 110 in accordance with the operation of the wrench bolt B and the bite 10 seated on the upper surface of the head body 110 is fixed to the fixing jaw 120 And the movable tank 130 are fixed firmly.

The fixing jaws 121 of the fixing jaws 120 and the movable jaws 131 of the movable jaws 130 are fixed by fastening the bite 10 directly to the fixing jaws 121, (131) has an inclined slope (?) Of an acute angle with respect to an upper surface (111) of the head body (110) and has an inclined slope surface.

In other words, the fixing jaw 121 and the movable jaw 131 are formed so as to protrude inwardly, that is, to the upper surface side with respect to the upper surface 111, by the protruding jaw portion, And is strongly tightened and prevented from being separated.

The surface defined by the inclined slope formed by the fixed jaw 121 and the movable jaw 131 is formed as a surface having a slope corresponding to the side surface of the shank 10b of the mounted bite 10, So that it is tightened by tightening in correspondence with the side surface of the shank 10b and can be prevented from being separated.

In addition, the lower side of the head body 110 on the side of the movable tank 130, that is, the portion of the head body 110 which contacts the movable tank 130, is formed to have an inclined curved surface R.

The contact portion of the movable tank 130, which contacts the inclined curved surface R, is formed to have an inclined inclined surface 133.

The structure in which the inclined curved surface R is formed with the inclined inclined surface 133 is configured such that when the operator fixes the replaced bite 10 using the wrench bolt B as the tightening member, The slope inclined surface 133 of the movable tank 130 is tilted while moving toward the upper side of the head body 110 by the inclined curved surface R of the head body 110.

This results in that the movable jaw 131 of the movable jaw 130 moves further toward the upper surface 111 of the head body 110. As a result, when the movable jaw 130 is moved on the upper surface 111 So that the seated bite 10 can be tightened more firmly.

As described above, the fixed holder 100 for a cutting tool according to the present invention includes a holder body bar 100a and a holder head part 100b, and the fastening structure of the holder head part 100b is used to cut the cutting tool 100. [ That is, the cutting tool fixing fixture 100 is always fixed to the workpiece side so as not to change the machining position with respect to the workpiece, and only the cutting tool in the holder head So that the work position for the workpiece can be maintained at a constant level even if the cutting tool is replaced.

5 (a) and 5 (b) are perspective views showing the adjustment of the zero point position of the fixture holder for a cutting tool according to another embodiment of the present invention.

The fixture holder 100 for a cutting tool according to the present invention is characterized in that the bite 10 is positioned at the same machining position as the machining position of the cutting tool before replacement at the time of replacement operation so that the bite tip 10a at the end, That is, the zero point can be adjusted.

Further, it has a structure in which the bite can always be fixed in the correct position and protruded to the proper length at the time of replacement operation.

5 (a), a fixed holder 100 for a cutting tool according to the present invention includes a fixed bar 120 and a movable bar 130 on one side of the movable bar 130, A protrusion A protruding toward the body 110 is formed.

A zero point groove 11 having a size corresponding to the zero point protrusion A is formed on one side of the shank 10b of the byte 10 to be replaced.

Preferably, the zero point protrusion A has a hemispherical shape, and when the bit 10 is fixed by using the movable jaw 130, the zero point protrusion A can not move to the zero point groove The bite 10 to be replaced is positioned at the same machining position as the machining position of the cutting tool before the replacement, so that the bite tip 10a at the end is positioned at the machining position with respect to the workpiece .

The zero point protrusion A is preferably implemented by the end of the fixing point 120 and the zero point protrusion bar 150 inserted through the zero point protrusion through hole A-1 formed in the movable tank 130 .

The zero point protrusion bar 150 and the zero point protrusion hole A-1 are coupled and fixed by thread engagement.

Hereinafter, the adjustment of the zero point position of the fixed holder 100 for a cutting tool according to the present invention will be described.

First, when the bite 10 is slidably inserted into the upper surface 111 of the head body 110, the operator can place the bite 10 to be replaced at the same position as the position of the pre- .

The zero point protrusion bar 150 is inserted through the zero point protrusion through hole A-1 to project the zero point protrusion A to the fixing tank 120 and the movable tank 130.

Then, the movable member 130 is used to fix the bite 10.

At this time, if the bite 10 is not positioned at the position of the byte 10 before replacement, that is, in the work fixing position, the zero point protrusion bar 150 will not be completely drawn through the zero point protrusion through hole A-1, The zero point protrusion A is caused to completely ride on the zero point groove 11 in a fixed position by tightening the zero point protrusion bar 150 while fixing the bit 10 by using the movable tank 130 .

As a result, the bite 10 to be replaced is positioned at the same machining position as the machining position of the cutting tool before the replacement, so that the bite tip 10a at the end can be positioned at the machining position with respect to the workpiece.

The zero point protrusion A may be formed on one side of the fixing jig 120 and the movable jig 130 but may be provided on either side of the fixing jig 120 or the movable jig 130, As shown in FIG.

It is needless to say that a plurality of the zero point protrusions A may be formed as necessary.

The zero point groove 11 formed in the bite 10 may be formed in accordance with the position and the number of the zero point protrusion A.

5 (b), the fixed holder 100 for a cutting tool according to the present invention has a structure using a stopper 140 for adjusting the zero point position.

The fixed holder 100 for a cutting tool according to the present invention includes a holder body bar 100a and a holder head 100b. The holder 10b protrudes upward, Is detachably mountable.

At this time, a stopper 140 for restricting the end position of the shank 10b of the bite 10 mounted on the holder body bar 100a is formed to protrude upward.

The stopper 140 has a size and shape capable of withstanding the force to be mounted when the bite 10 is slid, that is, the force to be pushed backward. Preferably, the stopper 140 has a protruding projection or plate shape, And the shape may be replaced by a structure capable of performing the same purpose.

Preferably, the stopper 140 is formed with a fastening hole 141 at one side thereof so that the gap between the stopper 140 and the bite 10 can be reduced and the bite 10 can be seated in a more accurate position. do.

At the end of the shank 10b of the bite 10, a tightening groove 12 is formed at a position corresponding to the tightening hole 141.

When the bite 10 is slidably mounted on the head body 110 of the holder head portion 100b, the stopper 140 can limit its position and be placed in the correct position. However, Or between the bite 10 and the movable jaw 130 so that the bite 10 can move finely or move during the tightening and fixing process by the movable jaw 130, The movement of the bite 10 is restricted by tightening the tightening member B1 which penetrates the tightening hole 141 of the stopper 140 and is fitted in the tightening groove 12 of the bite 10. [

The gap between the stopper 140 and the bite 10 is minimized by tightening by the tightening member and the bite 10 is positioned at the same machining position as the machining position of the cutting tool before the replacement, The bite tip 10a at the end has a structure capable of being positioned at a machining stationary position with respect to the workpiece, that is, a zero point can be adjusted.

In addition, the structure has a structure in which the bite can always be fixed in a correct position and protruding in an appropriate length at the time of replacing.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. It is not.

*** Description of the main parts of drawings ***
10: Byte 10a: Byte tip
10b: shank 11: zero home
12: Bolt groove 100: Fixing holder for cutting tool
100a: holder body bar 100b: holder head part
110: head body 111: upper surface
112: inner through hole R: inclined surface
120: fixing tank 121: fixing jaw
122: Wrench bolt hole 130:
131: movable jaw 132: bolt hole
133: inclined slope surface 140: stopper
141: Fastening hole 150: Zero projection bar
A: Zero protrusion A-1: Zero protrusion through hole

Claims

A holder body bar 100a having a length,
And a holder head part (100b) which is positioned at an end of the holder body bar (100a) and fastens the bite (10) by fastening it;
The holder head portion 100b includes:
A head body 110 on which the bite 10 is seated on an upper surface 111,
A fixture 120 integrally formed with the head body 110 and having a protruded fixing protrusion 121,
And a movable jaw 130 having a movable jaw 131 detachably coupled to a position corresponding to the fixed jaw 120,
And the shank 10b of the bite 10 positioned inside the movable tank 130 is tightly fixed by changing the position of the movable tank 130. [ Fixed holder.

The method according to claim 1,
The head body 110 forms an internal through hole 112,
The fixing tank 120 forms a wrench bolt hole 122 communicating with the internal through hole 112,
The movable tank 130 is formed with a bolt hole 132 at a position where the movable tank 130 can communicate with the internal through hole 112,
The wrench bolt B that is inserted through the wrench bolt hole 122 and positioned through the internal through hole 112 and the bolt hole 132 is moved in the direction of the arrow A by the operation of the head body 110, And a fastening member for fastening the fastening member to the fixing holder.

The method according to claim 1,
Wherein the fixing jaw (121) and the movable jaw (131) have an acute slope with respect to the upper surface (111) of the head body (110).

The method according to claim 1,
The lower side of the movable body 130 side of the head body 110 has an inclined curved surface R,
Wherein the contact portion of the movable tank (130) which contacts the inclined curved surface (R) has an inclined inclined surface (133).

The method according to claim 1,
A zero point protrusion A protruding toward the head body 110 is formed in the fixing tank 120 and / or the movable tank 130,
Wherein a zero point groove (11) having a size corresponding to the zero point projection (A) is formed on one side of the shank of the cutting tool (10).

The method according to claim 1,
The stationary tank 120 and / or the movable tank 130 are inserted through the zero point projection through hole A-1 penetrating through the one side and the zero point projection through hole A-1, Further comprising a zero point protrusion bar (150) forming a zero point protrusion (A) protruding toward the head body (110) side,
Wherein a zero point groove (11) having a size corresponding to the zero point projection (A) is formed on one side of the shank of the cutting tool (10).

The method according to claim 1,
Wherein a stopper (140) protrudes from the holder body bar (100a) to limit the end position of the shank (10b) of the cutting tool (10) mounted on the holder body bar (100a).

8. The method of claim 7,
The stopper 140 is formed to penetrate the fastening hole 141,
A tightening groove 12 corresponding to the tightening hole 141 is formed at an end of the shank 10b of the bite 10 so that the gap between the stopper 140 and the bite 10 Wherein the fastening member is made of a metal.