KR100435776B1 - rotary tool holder - Google Patents

Abstract

The present invention relates to a rotary tool holder. The present invention is installed on the body portion 10 of the tool holder (1) and the shank (30) is formed on the edge side O-ring (O-ring) 20, the shank (shank) of the body portion 10 The first key groove 40 formed on the upper surface of the (30) side, the first key 60 is fixed to the first key groove 40 by the bolt a1 (50a1), and the shank of the body portion 10 The second key groove 70 formed on the bottom surface of the 30 side, the second key 80 fixed to the second key groove 70 by the bolt a2 (50a2), and the shank of the body portion 10. The tool holder (1) is composed of a third key groove (90) formed at the side surface 30) and a third key (100) fixed to the third key groove (90) by a bolt a3 (50a3).

Description

Rotary tool holder

The present invention relates to a rotary tool holder, and more specifically, three keys are installed in a tool holder and mounted on a turret disk to maintain the positional accuracy, repeatability, and parallelism of the tool. It relates to a rotary tool holder to facilitate the coupling, separation.

In general, the conventional tool holder is used to form two keys on the body of the tool holder and combine them with a plurality of bolts on the turret disk.

However, the two keys are not formed in the turret disk to form a key groove that can be combined block type, the stability is reduced, the position accuracy of the Y-axis is weak, there was a problem that the tool such as the end mill, drill, etc. when the operation is unstable.

Another conventional tool holder and turret disc coupling structure is composed of four keys, so that only one side of each key is in contact with the turret disc, so that the cutting precision is not stable, and the error is increased as time passes. In order to realize repeatability, a separate cutting oil leakage prevention O-ring was formed in an eccentric manner, which was very inconvenient to remove.

In order to solve the above problems, the present invention is to form three keys (tool) in the tool holder, two keys formed up and down the tool holder body of the three keys (Z) axis It increases the accuracy of the direction and at the same time maintains the parallelism at the center of the tool holder. The key installed on the side of the tool holder body is thicker than the other ones and increases the position accuracy in the Y-axis direction. At the same time, the repeating accuracy is increased, and when the tool holder is coupled to the turret disk, the tool holder has an appropriate clearance at the portion where the three keys are coupled to make it convenient for tool replacement, and an O-ring formed on the shank. The purpose of the present invention is to provide a rotary tool holder that maintains the gap properly when the -ring is coupled to the shank insertion groove to facilitate detachment.

According to the aspect of the present invention for achieving the above object, in the tool holder (1), the O-ring (20) is installed on the body portion 10 of the tool holder (1) The formed shank 30, the first key groove 40 formed on the shank 30 side of the body portion 10, and the first key groove 40 to the bolt a1 (50a1) The first key 60 to be fixed, the second key groove 70 formed on the bottom surface of the shank 30 of the body portion 10, and the bolt a2 (50a2) to the second key groove 70; The second key 80 to be fixed, the third key groove 90 formed on the side of the shank 30 side of the body portion 10, and the bolt a3 (50a3) to the third key groove 90 It is achieved by a tool holder 1 composed of a third key 100 which is fixed.

In addition, as shown in FIG. 3, each key is inserted into the tool holder 1 and the turret disk 2 so that three keys are symmetrical with respect to the center of the shank 30 of the tool holder 1. Precision is achieved by forming a step in the portion to be inserted.

1 is an exploded perspective view of a coupling structure of a rotary tool holder and a turret disk according to the present invention;

2 is a perspective view of a rotary tool holder according to the present invention,

3 is an embodiment of a key of a rotary tool holder according to the present invention.

Explanation of symbols on the main parts of the drawing

One; Tool holder 2; Turret disc

10; Body portion 20 of the tool holder; O-ring

30; Shank 40; First keyway

50a1; Bolt a1 50a2; Bolt a2

50a3; Bolt a3 60; First key

70; Second keyway 80; 2nd key

90; Third key groove 100; Third key

110a1; Bolt groove a1 110a2; Bolt groove a2

110a3; Bolt groove a3 120; Jongki Home

130; Side key groove 140; Shank Insert Groove

150; Fastening bolt 160; Tightening Bolt Insertion Groove

170; tool

Hereinafter, preferred embodiments of the rotary tool holder according to the present invention with reference to the accompanying drawings in detail as follows.

1 is an exploded perspective view showing a coupling structure of a rotary tool holder and a turret disk according to the present invention, Figure 2 is a perspective view of a rotary tool holder according to the present invention, Figure 3 is a key of the rotary tool holder according to the present invention Related embodiment.

As shown in FIG. 1, the present invention comprises a tool holder and three key coupling structures as a whole.

First, the tool holder 1 has a rectangular trunk portion 10, a first key 60 provided on an upper surface of the trunk portion 10, and a second key (provided on a lower surface of the trunk portion 10) 80, a third key 100 provided on the side of the body portion 10, a tool shaft 170 provided on the same surface as the third key 100, and a turret disk in the body portion 10. It consists of a shank 30 installed in the direction in which (2) is located.

The first key groove 40 in which the first key 60 is installed is formed on the upper surface of the body portion 10 of the tool holder 1 in the direction in which the turret disk 2 is installed, and the body portion 10 The second key groove 70 is formed on the lower surface of the second key 80 is installed, the third key 100 in the side of the body portion 10, that is, the direction in which the tool shaft 170 is installed The third key groove 90 to be installed is formed.

The tool 170 is a portion in which a rotary tool (not shown) such as a drill and an end mill is installed.

The first key 60 integrally installed in the first key groove 40 formed in the upper portion of the body portion 10 may be coupled by a bolt a1 50a1, and the bolt a1 50a1 may be a first key. It is inserted into the bolt groove a1 (110a1) formed in the 60 to be firmly installed in the first key groove (40).

The second key 80 installed in the second key groove 70 formed at the lower portion of the body portion 10 may be coupled by a bolt a2 50a2, and the bolt a2 50a2 may be a second key 80. It is inserted into the bolt groove a2 (110a2) formed in the second key groove 70 so as to be firmly installed.

The third key 100 installed in the third key groove 90 formed on the side of the body portion 10 may be coupled by a bolt a3 50a3, and the bolt a3 50a3 may be a third key 100. It is inserted into the bolt groove a3 (110a3) formed in the third key groove 90 so as to be firmly installed.

The shank 30 is provided with an O-ring 20 on the edge thereof to prevent cutting oil from penetrating.

On the other hand, the turret disc (2) has a circular body as a whole, and the longitudinal key groove 120 and the horizontal key groove 130, regularly formed on the edge side, the fastening bolt insertion groove 160 and the shank insertion groove 140 is formed It is.

The combination of the tool holder 1 and the turret disc 2 will be described. When the tool holder 1 and the turret disc 2 are detached from each other, the repeatability of the tip edge of the tool edge installed in the tool shaft 170 is improved. It has a coupling structure that facilitates detachment and minimizes the change of precision on cutting load.

When the tool holder 1 is coupled to the turret disk 2, as illustrated in FIGS. 1 and 2, the first key 60 and the second key 80 are in the tool axis direction, that is, in FIG. 1. A tool such as a drill, an endmill, etc., which is determined in the Z-axis direction and is positioned above and below the shank 30 of the tool holder 1, respectively, is installed on the tool 170. When not rotated, the parallelism is not twisted by the torque of the tool and the precision is increased.

Meanwhile, as shown in FIG. 1, the third key 100 determines the position of the tool in the radial direction, that is, the Y axis direction.

The third key 100 is coincident with the center of a tool (not shown) mounted on the tool holder 1, and the tool holder rotates 180 degrees to allow precise processing even when machining in the opposite direction.

In addition, the third key 100 is formed to be three times thicker than the first key 60 and the second key 80. As shown in FIG. 2, the thickness of the first key 60 ( While the thickness t2 of t1 and the second key 80 is the same, the thickness t3 of the third key 100 is the thickness t1 of the first key 60 and the thickness of the second key 80. It is formed about three times thicker than (t2).

The reason is to make it possible to stably withstand the cutting load of the Y-axis, which is strong when the tool is used.

When the first key 60, the second key 80, and the third key 100 of the tool holder 1 are engaged with the longitudinal key groove 120 and the horizontal key groove 130 of the turret disc 2, The proper clearance is maintained to achieve the required precision, eliminating clearances such as interference fits, and making it easy to attach and detach from each other.

In addition, the first key 60, the second key 80, and the third key 100 are accurately formed in the symmetry and the right angle with respect to the center of the shank 30 of the tool holder 1 to reduce the occurrence of errors Let's do it.

When the shank 30 of the tool holder 1 is mounted on the shank insertion groove 140 of the turret disc 2 and operated, the O-ring 20 which prevents cutting oil from penetrating is inserted into the shank insertion groove of the turret disc 2. Maintain a proper clearance with the 140 to ensure the airtightness and convenience of detachment.

The present invention forms three keys in the tool holder when the tool holder and the turret disk are coupled, and the two keys installed up and down in the body part of the three keys are Z-axis direction, that is, tools such as end mills and drills. It has the effect of increasing the position accuracy in the axial direction of the tool holder, so that it is possible to maintain the unstable parallelism generated by the torque in the center of the tool holder, the key installed on the side of the tool holder is the Y axis direction, Raising the positional accuracy in the radial direction, there is an effect that the repeatability is kept stable. In addition, the key grooves of the three keys and the turret disk to have a proper clearance in the contact surface to facilitate the removal of the tool during replacement, there is an advantage that the repeat accuracy is stable.

In addition, as shown in FIG. 3, three keys are inserted into the tool holder 1 and the turret disk 2 is formed to have a step so that the center of the shank 30 of the tool holder 1 can be symmetrically formed. Therefore, there is an advantage that the precision can be maintained regardless of the tool holder installation direction. In addition, when the O-ring formed on the shank (O-ring) is detached to the shank insertion groove, there is a convenient effect at the time of maintaining a suitable gap to be coupled, spaced apart without disturbing the removal.

Claims (2)

In the tool holder (1), Shank 30 is installed on the body portion 10 of the tool holder 1 and the O-ring 20 is formed on the edge thereof, and the shank of the body portion 10 ( A first key groove 40 formed on the upper surface of the side 30, a first key 60 fixed to the first key groove 40 by a bolt a1 50a1, and a shank of the body portion 10; 30 a second key groove 70 formed on the lower surface of the side, a second key 80 fixed to the second key groove 70 by bolts a2 (50a2), and shanks of the body portion 10 ( 30) A rotary tool holder comprising a third key groove (90) formed on the side surface, and a third key (100) fixed to the third key groove (90) by bolts a3 (50a3). The method of claim 1, The third key 100 of the tool holder 1 is a rotary tool characterized in that it further comprises about three times thicker than the first key 60 and the second key 80 formed to the same thickness with each other holder.