JP2020069583A - Tool for opposed spindle type machine tool - Google Patents

Abstract

To provide a tool for an opposed spindle type machine tool that has a simple structure and is easy to handle.SOLUTION: A tool 9 for an opposed spindle type machine tool installed to a pair of a first spindle 1 and a second spindle 2 opposite to each other, includes a first shaft 10 that has a first shank 11 capable of being clamped by the first spindle 1; a cutter 12 supported by the first shaft 10; a second shaft 20 that has a second shank 21 capable of being clamped by the second spindle 2; a third shaft 30 connected on the opposite side to the second shank 21 of the second shaft 20; and a rotation mechanism 40 that connects the second shaft 20 and the third shaft 30 so as to relatively rotate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tool for an opposed spindle type machine tool.

A counter-spindle type machine tool is used to process the back surface or the inside of a work having a cavity (see Patent Documents 1 to 3).
In the machine tool of Patent Document 1 or Patent Document 2, a pair of sideways main spindles are arranged to face each other with a work table on which a work is placed sandwiched. A cutter is disposed inside the work, and the cutter is sandwiched between a pair of main shafts via a support shaft or the like and is rotationally driven to process the back surface of the work. In Patent Document 1 or Patent Document 2, a facing spindle type machine tool tool is constituted by a cutter and a pair of support shafts on both sides thereof.

  In Patent Document 3, an attachment body having a case is attached to one main shaft, and a holder is attached to the opposite main shaft to support the case. The case is provided with a cutter on a gear support portion extending laterally, and the rotation of one main shaft is transmitted to the cutter via a transmission mechanism in the case. Therefore, the back surface of the work can be processed by introducing the cutter and the gear support portion inside the work. In Patent Document 3, a tool for a counter spindle type machine tool is configured by the attachment body and the holder.

JP, 2005-7534, A JP, 2014-195851, A Japanese Patent No. 4051126

In the tools for opposed spindle-type machine tools of Patent Documents 1 and 2 described above, the pair of spindles rotate together with the cutter. Therefore, it is necessary to control so that the rotational speeds of the pair of main shafts become equal. Further, prior to processing, it is necessary to integrate the cutter and a pair of support shafts and the like into one piece, which makes the preparation work complicated.
In the tool for the opposed spindle type machine tool of Patent Document 3 described above, only one of the spindles on the attachment body side needs to be rotated for driving. However, in the opposed spindle type machine tool tool of Patent Document 3, the structure is complicated by the case and the transmission mechanism, and the shape of the work that can be machined to introduce the cutter is limited.

  An object of the present invention is to provide a facing spindle type machine tool tool having a simple structure and easy to handle.

  An opposing spindle type machine tool tool of the present invention is an opposing spindle type machine tool tool mounted on an opposing first spindle and second spindle, and having a first shank that can be clamped by the first spindle. A first shaft, a cutter supported by the first shaft, a second shaft having a second shank that can be clamped by the second main shaft, and a second shaft connected to a side opposite to the second shank of the second shaft. It is characterized by having three shafts and a rotating mechanism that connects the second shaft and the third shaft so as to be rotatable relative to each other.

According to the present invention as described above, the first spindle, the third spindle, and the second spindle are connected in series to form a facing spindle type machine tool tool, and the first shank and the second shank are respectively the first spindle and the second spindle. By mounting on the spindle, the opposed spindle type machine tool tool is sandwiched between the pair of spindles. Then, by rotating the first shaft by the first main shaft, the cutter supported by the first shaft can be rotated to process the work. Then, the third shaft or the second shaft is supported by the second main shaft to stably support the rotation of the cutter. At this time, since there is a rotation mechanism between the third shaft and the second shaft, it is not necessary to rotate the second shaft in synchronization with the first main shaft by the second main shaft, and if the second main shaft is stopped rotating. Of course, it is only necessary to control the rotation of the first spindle.
Therefore, it is possible to provide a facing spindle type machine tool tool having a simple structure and easy to handle.

  In the counter spindle type machine tool tool of the present invention, it is preferable to have a separable connection mechanism for connecting the first shaft and the third shaft.

In the present invention as described above, the connecting mechanism allows the tool for a counter spindle type machine tool to be attached to a first shaft (attached to the first spindle) having a cutter, and a third shaft and a second shaft (second shaft) connected by a rotating mechanism. It can be divided into two main shafts).
For this reason, the work has a closed annular portion, a frame-shaped portion, or an opening formed in the wall surface, and when the opposing spindle-type machine tool tool has to be inserted inside the work, the first portion divided by the connecting mechanism is used. By inserting either the main spindle side or the second main spindle side inside the annular portion or the like and then connecting again with the connecting mechanism, a series of opposed main spindle type machine tool tools can be inserted into the annular portion or the like. It is possible to support various types of processing by reducing the processing restrictions due to the shape of the work.

  In the counter spindle type machine tool tool of the present invention, the rotation mechanism can be locked at a predetermined reference angle around the second axis, and the first axis and the third axis are connected by the connection mechanism. It is preferable to have a lock mechanism capable of releasing the lock at the reference angle.

In the present invention as described above, when the opposed spindle type machine tool tool is in a series of states, that is, in the state where the first shaft and the third shaft are connected by the connection mechanism, the second shaft and the third shaft are connected in the rotating mechanism. Can be rotated relative to each other. That is, the first spindle to the connecting mechanism or the third spindle is rotated by the first spindle, but the rotating mechanism or the second spindle can be in a state (stopped, etc.) according to the second spindle.
On the other hand, when the opposing spindle type machine tool tool is divided by the connection mechanism, the third axis and the second axis are locked at a predetermined reference angle in the rotation mechanism, and the third axis is rotated by the external force or the like. It is possible to prevent unintentional rotation with respect to the second spindle. Therefore, even if the connection mechanism is divided and reconnected, the rotation phases of the first axis and the third axis are always kept constant, and even when the automatic tool change is performed, the division and reconnection of the first axis and the third axis are performed. The connection can be made surely.

  In the opposed spindle type machine tool tool of the present invention, the lock mechanism is installed so as to be movable back and forth along a central axis of the third axis, is prevented from rotating with respect to the third axis, and is connected to the connection mechanism. A push rod that is pushed by the first shaft and is movable toward the second shaft; and a second rod that is formed on the push rod and that the push rod moves toward the first shaft. And a rod engaging portion that engages with the push rod and the second shaft to prevent the push rod and the second shaft from rotating at a predetermined reference angle, and is urged toward the first shaft by being installed on the third shaft. It is preferable to have a rod urging means.

In the present invention as described above, when the connecting mechanism is in the connected state, the push rod is pushed by the first shaft and moves toward the second shaft, and the rotation stop for the second shaft due to the engagement of the rod engaging portion is released. Then, the relative rotation by the rotation mechanism is enabled. On the other hand, when the connection mechanism is in the divided state, the push rod is moved toward the first axis by the rod urging means, the rotation stop with respect to the second axis due to the engagement of the rod engagement portion becomes effective, and the rotation mechanism is rotated at the reference angle. Locked.
As described above, by constructing the mechanical lock mechanism using the push rod, it is possible to obtain a reliable operation while simplifying the structure, as compared with electrical control.

  In the counter spindle type machine tool tool of the present invention, the connection mechanism includes a guide pin formed on an end surface of the first shaft opposite to the first shank, and an auxiliary pin arranged around the guide pin. The guide bush is installed on an end surface of the third shaft and into which the guide pin can be inserted, and an auxiliary recessed portion around the guide bush that is displaceable along the third shaft and into which the auxiliary pin can be fitted. An abutting member, an abutting member urging means for urging the abutting member toward the first axis, a displacement of the abutting member toward the first axis, and the abutting member It is preferable to have a contact member regulating member that prevents rotation with respect to the third axis.

  In the present invention as described above, when connecting the connection mechanism, the first shaft and the third shaft are guided on the same axis by the guide pin and the guide bush. Then, by fitting the auxiliary pin of the first shaft into the auxiliary recess of the contact member, it is possible to prevent deviation of the rotational phase between the first shaft and the third shaft. The abutment member is displaceable in the axial direction of the third shaft and is urged by the abutment member urging means, so as to mitigate the impact or the like when connecting the first shaft and the third shaft. You can At this time, the contact member restricting member prevents the contact member from rotating with respect to the third shaft, and prevents excessive displacement in the first axis direction.

  According to the present invention, it is possible to provide a facing spindle type machine tool tool having a simple structure and easy to handle.

The axial sectional view which shows one Embodiment of the tool for opposing spindle type machine tools of this invention. The expanded sectional view which shows the principal part of the connection state of the said embodiment. The expanded sectional view which shows the operation which extracts the 1st axis | shaft of the said embodiment from the 3rd axis | shaft. The expanded sectional view which shows the state which separated the 1st axis | shaft and 3rd axis | shaft of the said embodiment. The enlarged view of the axis crossing direction which shows the connecting mechanism of the 1st axis of the above-mentioned embodiment. The enlarged view of the axis crossing direction which shows the connecting mechanism of the 3rd axis of the above-mentioned embodiment. FIG. 3 is an enlarged view in the axial crossing direction showing the rod engaging portion of the embodiment.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 shows a basic structure of a facing spindle type machine tool 9 according to an embodiment of the present invention, and FIG. 2 shows an enlarged view of a main part thereof.

The counter spindle type machine tool tool 9 is an attachment for back surface processing, which is mounted on a pair of first spindle 1 and second spindle 2 facing each other.
As a basic structure, the counter spindle type machine tool tool 9 includes a first shaft 10 having a first shank 11 which can be clamped by the first spindle 1, and a second shaft 21 which has a second shank 21 which can be clamped by the second spindle 2. It has a shaft 20 and a third shaft 30 connected to the side of the second shaft 20 opposite to the second shank 21.

A cutter 12 is supported on the first shaft 10.
The cutter 12 is a disk-shaped member that is coaxially fixed near the end of the first shaft 10 opposite to the first shank 11, and has a large number of cutting blades 13 arranged on the periphery. The cutter 12 is capable of cutting a work with the blade 13 by the first shaft 10 being clamped by the first main shaft 1 and being rotationally driven.

The second shaft 20 and the third shaft 30 are rotatably connected via a rotation mechanism 40.
The second shaft 20 has a tubular portion 22. The third shaft 30 has a hollow shaft portion 32 arranged coaxially inside the tubular portion 22. A pair of opposite angular bearings 41, 42 is installed between the cylindrical portion 22 and the shaft portion 32, and the second shaft 20 and the third shaft 30 are rotatable with respect to each other and are restricted from moving in the rotation axis direction. ..
The cylindrical portion 22, the shaft portion 32, and the angular bearings 41 and 42 constitute a rotating mechanism 40.

The third shaft 30 and the first shaft 10 are separably connected via a connection mechanism 50.
As shown in FIGS. 2 to 4 and 5, a guide pin 51 is formed on the rotation axis of the first shaft 10 on the end face of the first shaft 10 on the side of the third shaft 30, and a plurality of guide pins 51 are formed around the guide pin 51. Auxiliary pins 52 are arranged.
A guide bush 53 is installed at the center of the end surface of the third shaft 30.
The guide bush 53 is installed along the rotation axis of the third shaft 30, and the guide pin 51 can be inserted inside to fit the guide bush 53. When the guide pin 51 and the guide bush 53 are fitted together, the rotation axis of the first shaft 10 and the rotation axis of the third shaft 30 are guided so as to be the same axis.

On the end face of the third shaft 30, a contact member 54 is installed around the guide bush 53.
As shown in FIG. 6, the abutting member 54 is a rectangular member, and auxiliary recesses 55 are formed at the corners. The auxiliary recesses 55 can be fitted into the auxiliary pins 52 in a state where the guide pins 51 are fitted into the guide bushes 53.

As shown in FIGS. 4 and 6, the contact member 54 is movably installed along the rotation axis of the third shaft 30. A plurality of coil springs 56 (contact member urging means) are installed on the third shaft 30, and the contact member 54 is urged by the coil spring 56 toward the first shaft 10.
Around the contact member 54, a plurality of claw members 57 (contact member restriction members) are installed.
The base of the claw member 57 is fixed to the third shaft 30, and the tip end extending toward the first shaft 10 is inserted into the slit 541 of the contact member 54. As a result, the contact member 54 is prevented from rotating with respect to the third shaft 30.

  The claw member 57 has a claw portion 571 at the tip, and the claw portion 571 engages with the surface of the abutting member 54 on the first shaft 10 side in the slit 541, so that the first shaft 10 of the abutting member 54. The movement in the direction toward (the biasing direction of the coil spring 56) is restricted. Therefore, the contact member 54 is normally maintained in a position where it is engaged with the claw portion 571 on the first shaft 10 side by the bias of the coil spring 56, but the auxiliary pin 52 fits into the auxiliary recessed portion 55, By being pushed toward the second shaft 20 by the first shaft 10, the first shaft 10 can move away from the claw portion 571 and move toward the second shaft 20 side against the coil spring 56.

Therefore, in the connection mechanism 50, when the first shaft 10 and the third shaft 30 are connected, even if the first shaft 10 is strongly hit, the impact can be mitigated.
Further, by fitting the auxiliary pin 52 and the auxiliary recess 55, the first shaft 10 and the third shaft 30 connected by the connection mechanism 50 are prevented from rotating, and the connected first shaft 10 and the third shaft 30 are prevented from rotating. The shaft 30 and the shaft 30 can always be maintained at the same rotation angle.
A cylindrical cover 31 is installed on the outer periphery of the third shaft 30, and elements of the connection mechanism 50 such as the claw members 57 are housed in the cover 31.

As described above, when the third shaft 30 is connected to the first shaft 10 by the connection mechanism 50, the third shaft 30 rotates integrally with the first shaft 10. At this time, since the third shaft 30 is rotatably connected to the second shaft 20 by the rotating mechanism 40, even if the second shaft 20 rotates or stops integrally with the second main shaft 2, the third shaft 30 is restrained by the second shaft 20. There is no such thing.
On the other hand, in the state where the third shaft 30 and the first shaft 10 are separated in the connection mechanism 50, the third shaft 30 can freely rotate regardless of either the first shaft 10 or the second shaft 20, The control side cannot know the rotation angle position.
In order to avoid such a state, the rotation mechanism 40 can be locked between the second shaft 20 and the third shaft 30 by preventing the rotation mechanism 40 from rotating at a predetermined reference angle around the second shaft 20. A lock mechanism 60 that can unlock the lock is installed while the 10 and the third shaft 30 are connected by the connection mechanism 50.

In FIG. 4, the lock mechanism 60 has a push rod 61 inserted through the third shaft 30. The push rod 61 is supported by rod support bushes 62 and 63 installed on the third shaft 30, and is movable along the rotation axis of the third shaft 30.
An engagement groove 611 is formed in the push rod 61 in the longitudinal direction, an engagement pin 621 is formed in the rod support bush 62, and the engagement pin 621 is arranged in the engagement groove 611, whereby the push rod 61 is It is prevented from rotating with respect to the third shaft 30.

A stopper 612 is formed in the middle of the push rod 61, and a coil spring 64 (rod urging means) is interposed between the stopper 612 and the rod support bush 63. The push rod 61 is biased toward the first shaft 10 by the coil spring 64, and is normally held at the position shown in FIG.
In the state of FIG. 4, the tip of the push rod 61 is arranged inside the guide bush 53. Here, when the guide pin 51 is inserted into the guide bush 53 in order to connect the first shaft 10 to the third shaft 30, the guide pin 51 contacts the tip of the push rod 61 in the state of FIG. When the first shaft 10 is continuously moved toward the third shaft 30, the push rod 61 is pushed by the guide pin 51, moves to the second shaft 20 side against the coil spring 64, and the state of FIG. That is, the first shaft 10 and the third shaft 30 are connected by the connection mechanism 50.

The lock mechanism 60 utilizes the movement of the push rod 61 at the time of connecting the first shaft 10 described above to prevent rotation and release of the first shaft 10 and the third shaft 30, that is, lock and release of the rotation mechanism 40. To do.
A rod engaging portion 65 is formed at the opposite end of the push rod 61.
As shown in FIG. 7, the rod engaging portion 65 has a portion protruding laterally from the push rod 61, and its tip 651 is a cylindrical surface coaxial with the push rod 61. In manufacturing, a large-diameter cylindrical portion is formed at the end of the push rod 61, and both sides thereof are cut to form protruding portions on both sides.

As shown in FIGS. 7 and 4, when the push rod 61 is at the movement limit on the first shaft 10 side, that is, when the first shaft 10 and the third shaft 30 are not connected by the connection mechanism 50, The engagement portion 65 is engaged with the engagement hole 66 of the second shaft 20.
The engagement hole 66 is an oval through hole having a minor axis slightly larger than the rod engagement portion 65, and when the rod engagement portion 65 is arranged in the engagement hole 66, the push rod 61 rotates. The rotation of the second shaft 20 and the third shaft 30 is restricted at a predetermined reference angle (the angle at which the long axis of the rod engaging portion 65 and the long diameter of the engaging hole 66 are aligned).

On the other hand, as shown in FIGS. 7 and 2, when the push rod 61 is pushed by the first shaft 10 and moved to the second shaft 20 side, that is, the first shaft 10 and the third shaft 30 are connected by the connection mechanism 50. In the connected state, the rod engagement portion 65 is held inside the rotation chamber 67 of the second shaft 20, and is freely rotatable.
The rotation chamber 67 is formed on the second shank 21 side of the engagement hole 66, and the diameter of the inner peripheral surface of the rotation chamber 67 is slightly larger than the maximum diameter of the rod engagement portion 65. It is freely rotatable when inside.
When the connecting mechanism 50 separates the first shaft 10 and the third shaft 30 again, the rod engaging portion 65 of the lock mechanism 60 is smoothly introduced from the rotation chamber 67 into the engaging hole 66. Then, the first spindle 1 or the second spindle 2 is rotated to match the phases of the third shaft 30 and the second shaft 20.
Further, for smooth operation when the rod engagement portion 65 is introduced from the rotation chamber 67 into the engagement hole 66, chamfering processing 661 is performed on the peripheral edge of the engagement hole 66.

In the lock mechanism 60 as described above, when the first shaft 10 and the third shaft 30 are connected by the connection mechanism 50 (during processing, see FIG. 2), the rod engagement portion 65 is in the rotation chamber 67. Is rotatable, that is, the lock of the rotation mechanism 40 is released, and the second shaft 20 and the third shaft 30 are rotatably connected by the rotation mechanism 40.
On the other hand, in a state where the first shaft 10 and the third shaft 30 are separated by the connection mechanism 50 (during setup, etc., refer to FIG. 4), the push rod 61 is moved by the coil spring 64 and the rod engaging portion 65 is engaged. The rotary mechanism 40 is engaged with the dowel hole 66 and is prevented from rotating at a predetermined reference angle around the second shaft 20, and the second shaft 20 and the third shaft 30 are locked at this predetermined reference angle.
It should be noted that, by again bringing the first shaft 10 and the third shaft 30 close to each other and connecting them by the connecting mechanism 50, the push rod 61 is pushed and the rod engaging portion 65 moves from the engaging hole 66 into the rotation chamber 67. After the movement, the second shaft 20 and the third shaft 30 are made rotatable again.

According to the present embodiment configured as described above, the effects described below can be obtained.
In the present embodiment, the first shaft 10, the third shaft 30, and the second shaft 20 are connected in series to constitute the opposed spindle-type machine tool tool 9, and the first shank 11 and the second shank 21 are respectively formed into the first shank 11. By mounting on the main spindle 1 and the second main spindle 2, the opposed main spindle type machine tool tool 9 is sandwiched between the pair of the first main spindle 1 and the second main spindle 2. Then, by rotating the first shaft 10 with the first main shaft 1, the cutter 12 supported by the first shaft 10 can be rotated to process the work. Then, the third shaft 30 to the second shaft 20 are supported by the second main shaft 2 to stably support the rotation of the cutter 12. At this time, since there is the rotation mechanism 40 between the third shaft 30 and the second shaft 20, it is not necessary to rotate the second shaft 20 synchronously with the first main shaft 1 by the second main shaft 2, and the second main shaft 2 Rotation may be stopped, and only the rotation control of the first spindle 1 may be performed.
Therefore, it is possible to provide the opposed spindle type machine tool tool 9 having a simple structure and easy to handle.

In the present embodiment, the connecting mechanism 50 connects the counter spindle type machine tool tool 9 to the first shaft 10 (attached to the first spindle 1) having the cutter 12 and the third shaft 30 connected by the rotating mechanism 40. It can be divided into a second shaft 20 (mounted on the second main shaft 2).
Therefore, when there is a closed annular portion, a frame-shaped portion, or an opening formed in the wall surface in the work, and the opposing main spindle type machine tool tool 9 must be inserted inside the work, the connection mechanism 50 divides it. Either the first main shaft 1 side (the first shaft 10 and its cutter 12) or the second main shaft 2 side (the third shaft 30 and the second shaft 20) is inserted inside the annular portion or the like, and then the connecting mechanism 50 is inserted again. By connecting with, a series of opposed spindle-type machine tool tools 9 can be inserted through an annular portion or the like, and the restriction of machining due to the shape of the work can be reduced and various machining can be performed.

In the present embodiment, when the opposed spindle type machine tool tool 9 is in a series of states by the lock mechanism 60, that is, when the first shaft 10 and the third shaft 30 are connected by the connection mechanism 50, The second shaft 20 and the third shaft 30 can rotate relative to each other. In other words, the first shaft 10 to the connecting mechanism 50 to the third shaft 30 are rotated by the first main shaft 1, but the rotating mechanism 40 to the second shaft 20 can be brought into a state (stop, etc.) according to the second main shaft 2. ..
On the other hand, when the opposed main spindle type machine tool tool 9 is divided by the connection mechanism 50, the third shaft 30 and the second shaft 20 are locked at a predetermined reference angle in the rotation mechanism 40, and the third shaft 30 is subjected to an external force. For example, it is possible to prevent the second shaft 20 and the second main shaft 2 from unintentionally rotating. Therefore, even if the connection mechanism 50 is divided and reconnected, the rotation phases of the first shaft 10 and the third shaft 30 are always kept constant, and even when automatic tool change is performed, the first shaft 10 and the third shaft 30 are rotated. It is possible to surely perform division and reconnection with.

In the lock mechanism 60 of the present embodiment, when the connection mechanism 50 is in the connected state, the push rod 61 is pushed by the first shaft 10 and moves toward the second shaft 20, and the push rod 61 moves by the engagement of the rod engagement portion 65. The detent for the two shafts 20 is released, and the third shaft 30 and the second shaft 20 are brought into a state in which relative rotation by the rotating mechanism 40 is possible. On the other hand, when the connection mechanism 50 is in the divided state, the push rod 61 is moved toward the first shaft 10 by the coil spring 64 (rod urging means), and the rotation of the push rod 61 with respect to the second shaft 20 due to the engagement of the rod engaging portion 65. Becomes valid, and the rotation mechanism 40 is locked at the reference angle.
As described above, by configuring the mechanical lock mechanism 60 using the push rod 61, it is possible to obtain a reliable operation while simplifying the structure as compared with electrical control or the like.

  In the connection mechanism 50 of the present embodiment, when connecting, the first shaft 10 and the third shaft 30 are guided on the same axis by the guide pin 51 and the guide bush 53. Then, the auxiliary pin 52 of the first shaft 10 is fitted into the auxiliary recess 55 of the abutting member 54, so that the deviation of the rotational phase between the first shaft 10 and the third shaft 30 is prevented. The contact member 54 is displaceable in the axial direction of the third shaft 30 and is biased by a coil spring 56 (contact member biasing means) to connect the first shaft 10 and the third shaft 30. It is possible to reduce the impact when doing. At this time, the claw member 57 (contact member regulating member) prevents the contact member 54 from rotating with respect to the third shaft 30, and prevents excessive displacement in the direction of the first shaft 10.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications and the like within a range in which the object of the present invention can be achieved are included in the present invention.
In the above-described embodiment, the coil spring 64 that is the rod urging means and the coil spring 56 that is the abutting member urging means may be not only a coil but also other types of springs. May be
In the above-described embodiment, the claw member 57 is used as the abutting member restricting member, and both the detent of the abutting member 54 and the axial movement restriction are used. May be.

  In the above-described embodiment, the lock mechanism 60 is mechanically controlled by the push rod 61, but lock and release may be switched by electrical control. Further, in the lock mechanism 60, the rod engagement portion 65 is engaged with the engagement hole 66 or is rotated in the rotation chamber 67. However, for example, a radial lock pin formed on the second shaft 20 is used. For example, a rotation restricting mechanism that is releasable by another structure, such as protruding and engaging with the hole of the third shaft 30 to prevent rotation, may be used.

In the above-described embodiment, in the connection mechanism 50, the one guide pin 51 and the guide bush 53 installed at the center are fitted together, but a plurality of guide pins and the guide bushes arranged around the center are fitted together by concavity and convexity. Alternatively, the mechanism for holding the first shaft 10 and the third shaft 30 coaxially at the time of connection may be another mechanism.
In the above-described embodiment, the contact member 54 is installed in the connection mechanism 50, but the buffering function of the coil spring 56 may be omitted. In this case, the auxiliary recess 55 that engages with the auxiliary pin 52 is provided in the third shaft 30. It may be formed on the end face.

  INDUSTRIAL APPLICABILITY The present invention can be used as a tool for an opposed spindle type machine tool that is mounted on an opposed spindle type machine tool.

  DESCRIPTION OF SYMBOLS 1 ... 1st spindle, 2 ... 2nd spindle, 9 ... Opposite spindle type machine tool tools, 10 ... 1st axis, 11 ... 1st shank, 12 ... Cutter, 13 ... Blade, 20 ... 2nd axis, 21 ... 2nd shank, 22 ... Cylindrical part, 30 ... 3rd axis, 31 ... Cover, 32 ... Shaft part, 40 ... Rotation mechanism, 41 ... Angular bearing, 42 ... Angular bearing, 50 ... Connection mechanism, 51 ... Guide pin, 52 ... auxiliary pin, 53 ... guide bush, 54 ... contact member, 541 ... slit, 55 ... auxiliary recess, 56 ... coil spring (contact member biasing means), 57 ... claw member (contact member regulating member), 571 ... claw portion, 60 ... locking mechanism, 61 ... push rod, 611 ... engaging groove, 612 ... stopper, 62 ... rod supporting bush, 621 ... engaging pin, 63 ... rod supporting bush, 64 ... coil spring (rod urging) Means), 6 ... rod engaging portion, 651 ... front end, 66 ... engaging hole, 661 ... chamfering, 67 ... rotary chamber.

Claims (5)

An opposed spindle type machine tool tool mounted on an opposed first spindle and second spindle,
A first shaft having a first shank that can be clamped by the first main shaft;
A cutter supported by the first shaft,
A second shaft having a second shank that can be clamped by the second main shaft;
A third shaft connected to the opposite side of the second shaft from the second shank;
A rotating mechanism that connects the second shaft and the third shaft so as to be rotatable relative to each other, and a tool for a counter spindle type machine tool. The counter spindle type machine tool tool according to claim 1,
An opposing main spindle type machine tool tool having a separable connection mechanism for connecting the first shaft and the third shaft. The counter spindle type machine tool tool according to claim 2,
A lock capable of locking the rotation mechanism at a predetermined reference angle around the second axis and capable of unlocking at the reference angle in a state where the first shaft and the third shaft are connected by the connection mechanism. An opposing spindle type machine tool tool having a mechanism. The counter spindle type machine tool tool according to claim 3,
The lock mechanism is installed so as to be movable back and forth along a central axis of the third shaft, is prevented from rotating with respect to the third shaft, and is pushed by the first shaft connected to the connection mechanism to be pushed by the first shaft. A push rod that can move in two axes,
A rod formed on the push rod and engaging with the second shaft in a state where the push rod moves toward the first shaft to prevent the push rod and the second shaft from rotating at a predetermined reference angle. An engaging portion,
And a rod urging unit that is installed on the third shaft and urges the push rod toward the first shaft. The opposed spindle type machine tool tool according to any one of claims 2 to 4,
The connection mechanism includes a guide pin formed on an end surface of the first shaft opposite to the first shank,
An auxiliary pin arranged around the guide pin,
A guide bush installed on the end face of the third shaft, into which the guide pin can be inserted;
An abutment member having an auxiliary recessed portion that is displaceable along the third axis around the guide bush and into which the auxiliary pin can be fitted;
Contact member urging means for urging the contact member toward the first shaft,
And a contact member restricting member capable of restricting the displacement of the contact member toward the first axis and preventing the contact member from rotating with respect to the third axis. Tools.

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