JP2010264524A - Manual or automatic chattering preventing device of long tool and machining center having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machining center equipped with a chattering preventing device preventing chattering during cutting by a long tool. <P>SOLUTION: The chattering preventing device 100 of an automatic long tool comprises a support body 7 cantilever-supported by a fixed body and an arm body in the shape of a boomerang inserted into the long tool 11 to prevent the chattering, and the arm body can automatically be inserted/ejected and rotated by the operation and the operation control of a first motor and a second motor or the like. When the long tool is used as a tool in a machining by the machining center, a device for preventing the chattering is necessary, and therefore the machining center is provided with the chattering preventing device 100 of the long tool 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an apparatus for preventing chattering when a workpiece is cut by a long tool, and in particular, the long tool and a guide rod that extends in the extending direction of the long tool from the fixed side that holds the long tool and the insertion position holding. A boomerang-shaped arm body that forms a tool fitting hole, a center hole, and an insertion position holding hole to be attached to each rod in the arm portion is inserted into the long tool, the guide rod, and the insertion position holding rod as a chattering prevention device for the long tool. In particular, the present invention relates to a chattering prevention device in which movement or rotation of the device is performed manually or automatically, and further relates to a machining center included in the chattering prevention device.

The long tool is cantilevered on the fixed side, and chattering is likely to occur when the workpiece is cut while being cantilevered. On the other hand, examples of the holding device related to the long tool include Patent Document 1 and Patent Document 2.
There are various types of machining centers. The main configuration is that a column is erected on the base stand, the spindle stand is slidably supported on the column, and the desired tool is received from the automatic tool changer. It consists of what is automatically exchanged with the spindle and processes each part of the workpiece on the table. Of course, a control unit for controlling each of these elements is provided.
There are various types of tools for automatic tool change, and some include long tools. Since this long tool is cantilevered by the main shaft, there is a possibility that the long tool may be shattered during cutting, and this countermeasure is necessary. There are many prior arts as machining centers, and there is Patent Document 3 as an example, and Patent Document 4 is known as a known technique that seems to be effective in preventing chattering in the machining center.

Japanese Utility Model Publication No. 5-9807 (FIG. 1) Japanese Utility Model Publication No. 5-16094 (FIG. 2) Japanese Patent Laying-Open No. 2005-125421 (FIG. 1) Utility Model Registration No. 3117598 (FIG. 1)

The “tool changer” disclosed in Patent Document 1 prevents self-excited vibration during processing of a long tool, and uses a pressure fluid. Further, the “positioning block” of Patent Document 2 is intended to improve the processing accuracy when cutting with a long tool, and provides a positioning block having an expanding means.
Although the above Patent Document 1 and Patent Document 2 function to prevent chattering of the long tool, they do not prevent chattering of the long tool having a structure like the present invention described later. In addition, there is no known technique that is the same as or similar to the chattering prevention apparatus as in the present invention.
The “horizontal machining center” of Patent Document 3 is a machining center having the most common shape, but no special treatment is applied to the long tool.
The “tool unit” of Patent Document 4 has a feature in the tool unit portion in the machining center, which is held by a columnar ball spline (59) when the main shaft is moved so as to stably support the tool. Although it seems that there is an effect of preventing run-out and chatter during cutting, it differs greatly in configuration and purpose from the present invention described later. It should be noted that the machining center of the prior application having the same or similar device as the chattering prevention device of the present invention is not found in the applicant's investigation.

  The present invention has been invented in view of the above circumstances, has good operability, has a simple structure, and reliably prevents chatter during cutting of a long tool that is cantilevered and supported on the fixed side. An object of the present invention is to provide a chattering prevention device for a long tool that can be held in a standby position at a position that does not interfere when not in use. It is another object of the present invention to provide a machining center having a long tool chattering prevention device that can reliably prevent chattering during cutting of a long tool, has good operability, and has a relatively simple structure.

  In order to achieve the above object, the present invention is based on a long tool in which a blade is provided on a long-axis rod that is attached to a fixed end and extends toward the distal end. A chattering prevention device for preventing chattering during cutting of a workpiece, wherein the device forms a central hole that is detachably attached to a guide rod, and an arm that extends left and right from a portion of the central hole. A boomerang-shaped arm body having a portion and a support body provided on the fixed side to hold the arm body, the arm body being disposed on the distal end side of the arm portion on one side and It has a live center-like tool fitting portion for holding a tool and an insertion position holding hole arranged on the tip side of the arm portion on the other side of the arm body, and the support body is formed in the center hole. The guide to be inserted And an insertion position holding rod inserted into the insertion position holding hole. The guide rod and the insertion position holding rod are each cantilevered on the fixed side and arranged in parallel with the extending direction of the long tool. It consists of things.

  According to a second aspect of the present invention, the tool fitting hole has a live center shape that holds the guide rod slidably, and the insertion position holding hole has a tapered rod shape whose diameter decreases toward the tip. It consists of what forms the taper hole which fits in the said insertion position holding rod.

  According to a third aspect of the present invention, the arm body is manually attached to the long tool and the guide rod or the insertion position holding rod. The arm body is only attached to the guide rod except during cutting. The tool fitting portion is mounted on a holding rod which is held and rotated and is provided above the fixed side and cantilevered on the fixed side.

  According to a fourth aspect of the present invention, a boomerang-shaped arm body that forms a tool fitting hole and an insertion position holding hole at the distal end side of the center hole and the arm portion extending left and right is cantilevered on the fixed side. Insert the tool fitting hole of the arm body into the long tool that is inserted into the support body consisting of the guide rod and the insertion position holding rod and is cantilevered on the fixed side together with the rods. A long tool chatter prevention device that holds a tool to prevent chatter during cutting of a workpiece and that is rotated and held at a standby position with the arm body inserted only in the guide rod when not needed. And the arm body of the chattering prevention device is automatically inserted into the support body to hold the long tool and the arm body is inserted into the long tool or the insertion position when not needed. Automatically, characterized in that held in the standby position by rotating about the automatic withdrawal of the guide rod and a lifting rod.

  According to a fifth aspect of the present invention, the guide rod has an outer peripheral structure capable of moving in the axial direction while restricting free rotation of the arm body, and forms a central hole. A reciprocating mechanism portion is provided to connect the distal end side to the arm body side by providing a free joint, a motor is connected to the guide rod and the reciprocating mechanism portion, and the reciprocating mechanism portion is rotated by the rotation of the motor. It consists of what is formed so that expansion-contraction is possible in a direction.

  Further, the invention of claim 6 is a machining center formed so as to cut a workpiece without chatter with a long tool, and the machining center is a spindle base disposed on the front surface of a column standing on a base table. And a fixed body fixed to the front side of the headstock, a table arranged on the base base, and an automatic tool changer and a control unit for storing tools including the long tool and automatically changing tools with the headstock side. And a chattering prevention device, the chattering prevention device is provided with a long tool attached to a main shaft and a guide rod that is cantilevered and supported by the fixed body, and a support body that provides an insertion position holding rod, It consists of a long tool, a guide rod, and a boomerang-shaped arm body having holes to be inserted into the insertion position holding rods, and the arm body is engaged with the support body. Characterized in that it is formed in order to perform Umate chattering prevention.

  According to a seventh aspect of the present invention, the arm body is formed so as to be movable along the guide rod and is rotatable about the guide rod. It is characterized in that it consists of something that is held in position and stands by.

  The invention according to claim 8 is characterized in that the movement and rotation of the arm body is performed manually or automatically.

  According to the long tool chatter preventing device of claim 1 of the present invention, the chatter preventing device of the present invention comprises a boomerang-shaped arm body and a support body disposed on the fixed side to hold the arm body, At the time of cutting, chattering can be reliably prevented by holding the distal end side of the long tool by the arm body that is manually held and fixed to the support body.

  According to the long tool chattering prevention device of claim 2 of the present invention, the tool fitting hole is formed in a live center shape, so that the long tool can be reliably supported stably, and the arm body is tapered. The insertion position holding rod is surely positioned and fixed at a predetermined position. Thus, chattering can be reliably prevented.

  According to the long tool chatter preventing device of claim 3 of the present invention, when cutting with the long tool is not performed, the arm body is held at a position (standby position) that does not get in the way and can wait. In addition, it does not interfere with other operations and can respond quickly during use.

  According to the automatic long tool chatter prevention device of claim 4 of the present invention, the long tool is held on the fixed side by inserting the arm body into the support body, and chatter during cutting is reliably prevented. At the same time, it can be moved to a position where it does not get in the way (standby position) when it is not needed, and can be put on standby. These operations are automatically performed, and effects such as improvement of operability and operation efficiency can be obtained.

  Further, according to the chattering prevention device for an automatic long tool of claim 5 of the present invention, the automatic movement mechanism of the arm body is clearly shown, and reliable automation can be achieved.

  According to the machining center having the long tool chatter prevention device of the sixth aspect of the present invention, the arm body and the support body for holding the arm body are provided, and the arm body is attached to the support body side when working with the long tool. Can prevent chatter.

  Further, according to the machining center having the long tool chatter preventing device of the seventh aspect, the arm body is slidable along the guide rod, and the arm body can be easily attached to the support body when processing with the long tool. . Further, since the arm body can freely rotate along the guide rod, the arm body can be rotated and held at a position (standby position) where it does not get in the way when not required.

  Further, according to the machining center having the chattering prevention device for a long tool according to claim 8, the movement and rotation of the arm body is performed manually or automatically, the selection is free, and either one is applied according to the purpose. be able to.

The front view (a) which shows the structure of the arm body of this invention, and the AA sectional view (b) of Fig.1 (a). The perspective view which shows the whole structure of the chatter prevention apparatus of the long tool of this invention. The front view of the chatter prevention apparatus of the long tool of this invention. FIG. 4 is a side sectional view of FIG. 3. Sectional drawing which shows the engagement state of a holding rod and a tool fitting hole. The axial sectional view showing an example of the automatic mechanism of the arm body in the present invention. Operation | movement explanatory drawing for demonstrating automatic insertion and automatic rotation of an arm body. The front view which shows the general | schematic structure of the machining center which provided the chattering prevention apparatus of the long tool. The side view of FIG.

  Embodiments of a long tool chattering prevention device and a machining center having the same according to the present invention will be described below in detail with reference to the drawings.

First, the structure of the arm body 1 will be described with reference to FIGS. As shown in FIG. 1 (a), the arm body 1 is made of a boomerang-like member and includes arm portions 3 and 4 extending from the center hole 2 to the left and right. In this embodiment, as shown in FIG. 1 (b), the arms 3 and 4 have two plates 3a, 4a and 3b, 4b arranged together with an appropriate width dimension W to form an integral structure. Made up of.
A tool fitting hole 5 and an insertion position holding hole 6 are formed on the distal ends of the arm part 3 and the arm part 4, respectively.
The center hole 2, the tool fitting hole 5, and the insertion position holding hole 6 are formed so that rods to be described later can be smoothly inserted. Specifically, as an example, the center hole 2 includes a hollow shaft body 2b having a slide bush 2a therein, and the tool fitting hole 5 includes a live center-shaped hollow cylinder body 5b having a bearing 5a. Is composed of a taper bush 6b and the like in which a taper portion 6a is formed. However, the present invention is not limited to this.

FIG. 2 is a perspective view showing the arm body 1 and the support body 7 holding the arm body 1 shown in FIG. 1, and FIGS. 3, 4 and 5 show their detailed structures.
The support 7 includes a guide rod 9 and an insertion position holding rod 10 which are cantilevered by a fixed body 8.

As shown in FIGS. 2 and 4, a long tool 11 in which a blade 11 b is disposed on a long axis rod 11 a is provided on a fixed body 8. For example, it is composed of a tool which is attached to the main shaft 25 at its base end side and extends in the horizontal direction (not necessarily in the horizontal direction) and is cantilevered.
Further, the guide rod 9 is composed of a shaft that is cantilevered by the fixed body 8 and is provided with the long tool 11, and the insertion position holding rod 10 is cantilevered by the fixed body 8 as shown in FIG. 11 and a taper portion 10a that is reduced in diameter toward the tip.

  2, 3, and 4, the arm body 1 is rotatably supported around the guide rod 9 with the center hole 2 inserted into the guide rod 9, and in the axial direction of the guide rod 9. It is slidably supported. The arm body 1 is held in a state where the long tool 11 is inserted into the tool fitting hole 5 with the arm portion 3 facing downward, and the arm portion 4 of the arm body 1 is directed upward to hold the insertion position retaining hole. 6 is held with the insertion position holding rod 10 inserted. Since the insertion position holding hole 6 and the insertion position holding rod 10 are formed with a taper portion 6a and a taper 10a, the arm body 1 is fitted to the support body 7 with the taper portion 6a and the taper portion 10a. The insertion position is fixed at the position, and the support 7 is securely held without play.

  When the workpiece is cut by the chattering prevention device 100 of the long tool 11, the arm body 1 is held in the state shown in FIGS. 2, 3, and 4, so that the long tool 11 is stably supported by the arm body 1 and cut. There is no chatter at times. In this embodiment, the arm body 1 is inserted into and removed from the support body 7 manually, but the operation is easy and quick insertion and removal can be performed. Although a manual moving mechanism is not described here, a known technique is applied.

As described above, the arm body 1 is held in the state shown in FIG. 2 or the like during cutting. However, in the present embodiment, the arm body 1 is held at the position indicated by the dotted line in FIG. In the case of not cutting, it is of course possible to pull out the arm body 1 from the support body 7 and store it in another place. However, in order to improve the operability, it is formed so as to be positioned at the upper position shown in FIG. .
That is, the arm body 1 is moved in a direction away from the support body 7, the arm body 1 is supported only by the guide rod 9, and the other tool fitting hole 5 and insertion position holding hole 6 are the long tool 11 and insertion position holding rod. Move to a position off 10. By rotating the arm body 1 around the guide rod 9 in this state, the arm body 1 can be moved to the state (standby position) indicated by the dotted line in FIG. By moving the arm body 1 to this standby position, the arm body 1 does not get in the way and other operations are performed smoothly.

  As described above, the arm body 1 is moved to the position indicated by the dotted line in FIG. 3, and it is necessary to fix the arm body 1 at this position. For this purpose, the holding rod 12 is required. As shown in FIG. 4, the holding rod 12 is composed of a rod that is cantilevered on the upper side of the fixed body 8, and its structure is shown in FIG. The holding rod 12 has a structure in which the tool fitting hole 5 of the arm body 1 is inserted, and the tool fitting hole 5 can be smoothly inserted and removed.

Next, an example of the structure for automatic insertion and automatic rotation of the arm body 1 will be described with reference to FIG. 6, but the structure is not limited to this structure.
First, in the present embodiment, the guide rod 9 inserted into the center hole 2 has a splined outer periphery, and the spline-shaped guide rod 9 is fitted in the spline-shaped center hole 2 of the arm body 1. The structure is pivotally supported by the fixed body 8. A first motor 13 held on the fixed body 8 side is connected to the rear end of the guide rod 9, and the guide rod 9 is rotated (turned) by the operation of the first motor 13 to rotate or rotate the arm body 1. Rotate.

The guide rod 9 has a long axis having a hollow hole 14, and a reciprocating mechanism portion 15 having a reciprocating axis 16 is accommodated in the hollow hole 14.
In this embodiment, the reciprocating mechanism 15 includes a second motor 18 housed in a cylindrical body 17 pivotally supported by the hollow hole 14, a screw rod 19 connected thereto, and a reciprocating shaft 16. Etc. The reciprocating shaft 16 includes a first rod 21 that forms a nut portion 20 that is screwed to the screw rod 19, a second rod 23 that is connected to the first rod 21 via a free joint 22, and the like. The rod 23 is connected to the arm body 1 via a connector 24 at the tip thereof. With the above structure, the arm body 1 can reciprocate along the guide rod 9 by the operation of the second motor 18.

Next, operations of automatic insertion and automatic rotation of the arm body 1 in this embodiment will be described with reference to FIGS.
First, as shown in FIG. 7B, the arm body 1 is held at a position away from the long tool 11 and the insertion position holding rod 10 in a free state while being held by the guide rod 9. When the second motor 18 is operated in this state, the reciprocating shaft 16 is moved by the threaded engagement between the screw rod 19 and the nut portion 20 of the first rod 21, and the arm body 1 connected thereto is guided by the guide. It moves along the outer periphery of the rod 9, the tool fitting hole 5 of the arm body 1 is inserted into the long tool 11, the insertion position holding hole 6 is inserted into the insertion position holding rod 25, and the arm body 1 is positioned at a predetermined position. The long tool 11 is held and acts to prevent chattering.

Next, when the arm body 1 is not required, first, the arm body 1 in the state of FIG. 7A is moved along the guide rod 9 to the position shown in FIG. 7B by the operation of the second motor 18. , Free state. The arm body 1 is rotated by operating the first motor 13 in this state, and the arm is operated by operating the second motor 18 in a state where the arm body 1 is rotated to the position indicated by the dotted line in FIG. The tool fitting hole 5 of the body 1 is attached to the holding rod 12, and the arm body 1 is held at the standby position indicated by the dotted line in FIG.
Note that a control device is necessary for the above operation, but this device is easily formed by applying a known technique, and the detailed structure thereof is omitted here. Of course, a position detection sensor is also required.

  FIG. 8 shows a schematic structure of a machining center 200 provided with a long-bit chatter prevention device 100. The machining center 200 is roughly divided into a spindle stock 26 provided with a spindle 25, a column 27 that supports the spindle stock 26 and moves in the Y direction, a table 28 that moves in the X direction, and a base table 29 on which the column 27 and the table 28 are mounted. The automatic tool changer 30 and the like. The overall structure of the machining center composed of the above components is a known technique, and the description thereof is omitted here.

  As shown in FIG. 9, the fixed body 8 is fixed to the front surface of the head stock 26 and is formed so as to move together with the head stock 26.

  The long tool chattering prevention device 100 is roughly divided into an arm body 1 and a support body 7, and the support body 7 is fixedly disposed on the fixed body 8 side.

  As shown in FIGS. 8, 9, 3, etc., the support body 7 includes a guide rod 9, an insertion position holding rod 10, and a holding rod 12, which support the base end side of the fixed body 8 in a cantilevered manner. In addition, the long tool 11 is attached to the main shaft 25 so that the base end side is attached to the main shaft 25. In the present embodiment, the long tool 11 is disposed at the lowest position, the guide rod 9 is disposed above the long tool 11, and the insertion position holding rod 10 is disposed further above. Further, the holding rod 12 having the structure as shown in FIG. 5 is also cantilevered on the fixed body 8 side at the position shown in FIG.

  The arm body 1 has a general structure that can be inserted into the guide rod 9, the insertion position holding rod 10, and the long tool 11 of the support body 7, and is inserted into the long tool 11 when rotated about the guide rod 9. The holding rod 12 is disposed so that the hole portion is inserted into the holding rod 12.

Next, the structure of the arm body 1 will be described with reference to FIG. 9, FIG. 1, FIG.
The arm body 1 is made of a boomerang as shown in the figure, and includes arm portions 3 and 4 extending from the center hole 2 to the left and right. In this embodiment, as shown in FIG. 1 (b), the arms 3 and 4 have two plates 3a, 4a and 3b, 4b arranged together with an appropriate width dimension W to form an integral structure. Made up of.
A tool fitting hole 5 and an insertion position holding hole 6 are formed on the distal ends of the arm part 3 and the arm part 4, respectively.
The center hole 2, the tool fitting hole 5, and the insertion position holding hole 6 are formed so that rods to be described later can be smoothly inserted. Specifically, as an example, the center hole 2 is formed of a hollow shaft body 2b having a slide bush 2a therein, the tool fitting hole 5 is formed of a live center-shaped hollow cylinder body 5b having a bearing 5a, and the insertion position holding hole 6 is Although it consists of the taper bush 6b etc. which form the taper part 6a inside, of course, it is not limited to these.

As shown in FIGS. 9 and 3, the long tool 11 in which the blade 11 b is disposed on the long-axis rod 11 a is attached to the main shaft 25 provided on the fixed body 8 at the base end side, and from here the horizontal direction ( It may be a tool that is cantilevered and extended in a horizontal direction.
The guide rod 9 is a shaft that is cantilevered by the fixed body 8 and is provided with the long tool 11, and the insertion position holding rod 10 is cantilevered by the fixed body 8 and is provided with the long tool 11. It consists of what forms the taper part 10a which consists of a shaft-shaped thing and diameter-reduces toward the front-end | tip.

  9, 3, and 4, the arm body 1 is rotatably supported around the guide rod 9 with the center hole 2 inserted into the guide rod 9, and is slid in the axial direction of the guide rod 9. It is supported movably. The arm body 1 is held in a state where the long tool 11 is inserted into the tool fitting hole 5 with the arm portion 3 facing downward, and the arm portion 4 of the arm body 1 is directed upward to hold the insertion position retaining hole. 6 is held with the insertion position holding rod 10 inserted. Since the insertion position holding hole 6 and the insertion position holding rod 10 are formed with a taper portion 6a and a taper 10a, the arm body 1 is fitted to the support body 7 with the taper portion 6a and the taper portion 10a. The insertion position is fixed at the position, and the support 7 is securely held without play.

  The long tool 11 is stably supported by the arm body 1 because the arm body 1 is held in the state shown in FIGS. 9, 3, and 4 when the workpiece is cut by the machining center 100 having the long tool chatter prevention device. Therefore, chatter during cutting does not occur. In the present embodiment, the arm body 1 is shown to be inserted into and removed from the support body 7 manually, but may be automatic.

As described above, the arm body 1 is held in the state shown in FIG. 3 or the like when cutting, but is held at the position shown by the dotted line in FIG. 3 when not cutting. In the case of not cutting, it is of course possible to pull out the arm body 1 from the support body 7 and store it in another place. However, in order to improve the operability, it is formed so as to be positioned at the upper position shown in FIG. .
That is, the arm body 1 is moved in a direction away from the support body 7, the arm body 1 is supported only by the guide rod 9, and the other tool fitting hole 5 and insertion position holding hole 6 are the long tool 11 and insertion position holding rod. Move to a position off 10. By rotating the arm body 1 around the guide rod 9 in this state, the arm body 1 can be moved to the state shown by the dotted line in FIG. By moving the arm body 1 to this position (standby position), the arm body 1 does not get in the way and other operations are performed smoothly.

  Although the arm body 1 is moved to the position shown by the dotted line in FIG. 3, it is necessary to fix the arm body 1 at this position. For this purpose, the holding rod 12 is required. As shown in FIG. 5, the holding rod 12 is a rod that is cantilevered above the fixed body 8. The holding rod 12 has a structure in which the tool fitting hole 5 of the arm body 1 is inserted, and the tool fitting hole 5 can be smoothly inserted and removed.

  The chattering prevention device 100 for a long tool of the present invention has the above-described structure, is composed of all mechanical structures, has a simple structure, and is operated manually, so that operability is improved. Although the long tool chattering prevention device 100 has the above-described structure, this is an example, and the same technical category is of course applicable.

As described above, the arm body 1 is automatically mounted on the support body 7 side, and chattering during cutting of the long tool 11 can be prevented, and the arm body 1 is moved to the standby position when not needed, and these are automatically performed. As a result, operability and operating efficiency can be improved.
The present embodiment includes the above description, but the present invention is not limited to the above description, and the same technical category is of course applied.
The machining center 200 includes the long tool chattering prevention device 100 having the above-described structure. When the long tool 11 is used by changing the tool, the long tool chattering prevention device 100 is manually or automatically mounted. Processing without chattering can be performed, and a great effect can be achieved as compared with a machining center not provided with a machining center having the chattering prevention device of this long tool.
The content of the above description is one example, and the same technical category is of course applied.

The chattering prevention device for a long tool of the present invention can be applied to all parts where cutting is performed using the long tool, and the range of use is extremely wide.
The chattering prevention device for an automatic long tool according to the present invention can be applied to all machines that use the long tool, and its application range is extremely wide. Further, not only a long tool but also a device using a rotating long shaft can be applied as a device for preventing chattering of the long shaft, and its use range is extremely wide.
The machining center having the long tool chatter prevention device of the present invention can be applied to all other types of machining centers, and its use range is extremely wide.

DESCRIPTION OF SYMBOLS 1 Arm body 2 Center hole 2a Slide bush 2b Hollow shaft body 3 Arm part 3a Board 3b Board 4 Arm part 4a Board 4b Board 5 Tool fitting hole 5a Bearing 5b Hollow cylinder 6 Insertion position holding hole 6a Taper part 6b Taper bush 7 Support body 8 Fixed body 9 Guide rod 10 Insertion position holding rod 10a Tapered portion 11 Long tool 11a Long shaft rod 11b Cutlery 12 Holding rod 13 First motor 14 Hollow hole 15 Reciprocating mechanism 16 Reciprocating shaft 17 Cylindrical body 18 First body No. 2 motor 19 Thread rod 20 Nut portion 21 First rod 22 Free joint 23 Second rod 24 Connector 25 Spindle 26 Spindle 27 Column 28 Table 29 Base 30 Automatic tool changer 100 Long tool chatter prevention device 100 Automatic Type long tool chatter prevention device 200 m Thinning center

Claims (8)

  A chattering prevention device for preventing chattering at the time of cutting an object to be cut by a long tool, in which a tool is provided on a long-axis rod that is attached to the fixed side and extends toward the tip side, The apparatus includes a boomerang-shaped arm body that has a central hole that is removably attached to the guide rod, and has an arm portion that extends left and right from a portion of the central hole, and the fixed side to hold the arm body. The arm body is disposed on the distal end side of the arm part on one side thereof, and a live center-shaped tool fitting part for holding the long tool and on the other side of the arm body. And an insertion position holding hole inserted in the insertion position holding hole. Consists of a, the guide rod and the insertion position holding rods, each said has the fixed side pieces supported by chattering prevention apparatus of a long tool, characterized in that it consists of those parallel to the extending direction of the long tool.   The tool fitting hole is formed in a live center shape that holds the guide rod slidably, and the insertion position holding hole is a taper that fits into the insertion position holding rod having a tapered rod diameter that decreases toward the tip. The chattering prevention device for a long tool according to claim 1, wherein the chattering prevention device is configured to form a hole.   The arm body is manually mounted on the long tool, the guide rod, and the insertion position holding rod, and the arm body is held only by the guide rod and is rotated and fixed except during cutting. 3. The long tool anti-chatter of the long tool according to claim 1, wherein the tool fitting portion is mounted on a holding rod that is provided on an upper side of the side and is cantilevered on the fixed side. apparatus.   A boomerang-shaped arm body that forms a tool fitting hole and an insertion position holding hole on the distal end side of the central hole and the arm portion extending from side to side from the center rod and the insertion position holding rod. A tool fitting hole of the arm body is inserted into a long tool that is provided alongside the rods and cantilevered on the fixed side, and the long tool is held to hold the long tool. A chattering prevention device for a long tool that prevents chattering at the time of cutting and that is pivotally held at a standby position with the arm body inserted only in the guide rod when not needed. The arm body is automatically inserted into the support to hold the long tool, and when not needed, the arm body is automatically pulled from the long tool and the insertion position holding rod. Chattering prevention device automatic long tool, characterized in that automatically held at a standby position by rotating around the vent said guide rod.   The guide rod has an outer peripheral structure that can move in the axial direction while restricting free rotation of the arm body, and forms a center hole. The center hole is provided with a free joint in the middle portion, and the arm body side A reciprocating mechanism for connecting the distal end side to the guide rod and the reciprocating mechanism. The chattering prevention device for an automatic long tool according to claim 4, comprising:   A machining center formed to cut a workpiece without chatter with a long tool, and the machining center is fixed to a headstock disposed on a front surface of a column standing on a base table and a front surface side of the headstock. A fixed body, a table arranged on a base table, and an automatic tool changer and a control unit for accommodating a tool including the long tool and automatically changing tools with the headstock side and having a chattering prevention device. The chatter prevention device includes a support body provided with a guide rod and an insertion position holding rod that are cantilevered and supported by the fixed body along with a long tool attached to a main shaft, and the long tool, the guide rod, and the insertion position hold. It consists of boomerang-shaped arm bodies each having a hole inserted into the rod. The arm body should be engaged with the support body to prevent chatter. Machining center with a chatter prevention device of long tools, characterized in that it is formed.   The arm body is formed to be movable along the guide rod and is rotatable about the guide rod. When not required, the arm body is rotated and held at a standby position to wait. A machining center having the chattering prevention device for a long tool according to claim 6.   The machining center having a long tool chatter prevention device according to claim 6 or 7, wherein the arm body is moved and rotated manually or automatically.

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