JPH10286732A - Turning center - Google Patents

Abstract

(57) [Summary] [Purpose] Both fixed and rotary tools can be mounted on two orthogonal tool spindles, and a tool can be selectively mounted on one of the two tool spindles according to the shape of the workpiece. . [Constitution] A spindle head A provided on a machine body 1
Is movable only in the X-axis direction, and a workpiece spindle B is vertically arranged on this. The tool spindle head E moves in the orthogonal Y and Z axis directions, and the two tool spindles 6, 7
Is installed. The two tool spindles 6 and 7 can mount fixed tools such as a rotary tool and a turning tool. The automatic tool changer is shared by the two spindles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to two orthogonal directions.
The present invention relates to a turning center having two tool spindles. More specifically, the present invention relates to a turning center in which a fixed tool and a rotating tool can be mounted on two orthogonal tool spindles.

[0002]

2. Description of the Related Art A turning center mainly rotates a workpiece and automatically changes a tool (including a turret type).
In addition to turning, without replacing the workpiece,
This is a numerically controlled machine tool that performs various types of machining.

[0003] Such a turning center has a type in which a workpiece spindle for rotating a workpiece held by a chuck is horizontal (hereinafter referred to as a horizontal turning center) and a type in which a workpiece held by a chuck is rotated. There is a vertical type (hereinafter, referred to as a vertical turning center) in which a workpiece spindle to be driven is in a vertical direction. As an example of a horizontal turning center, there is a lathe for combined machining as disclosed in Japanese Patent Publication No. Hei 7-16801. However, there is a problem that it is difficult to share the X-axis direction rotary tool and the Z-axis direction rotary tool mounted on the turret tool rest.

As an example of a vertical turning center, there is a combined machine tool disclosed in Japanese Patent Application Laid-Open No. 62-259735. In this combined machine tool, a turning tool and a rotary tool are provided with separate tool magazines, tool spindles, and the like. Japanese Patent Laid-Open Publication No. Hei 6-1994 discloses a technique for standardizing an automatic tool changer (hereinafter referred to as ATC) of a compound machine tool.
126571. However,
JP-A-62-259735 and JP-A-6-12
The compound machine tool described in Japanese Patent No. 6571 has the following problems because the tool spindles are provided in parallel. The only turning tool used for turning a workpiece is a boring bar with a boring bar system extending in the spindle axis direction.For a workpiece with a long axial dimension, the axial dimension of the boring bar increases. There has been a problem that the rigidity is insufficient and the cutting ability is reduced.

[0005]

SUMMARY OF THE INVENTION The present invention has been made based on such a technical background, and achieves the following objects.

SUMMARY OF THE INVENTION An object of the present invention is to provide a turning center which has two orthogonal tool spindles, and on which each of a tool such as a turning tool and a rotary tool can be mounted.

Another object of the present invention is to provide a turning center which has two orthogonal tool spindles and can select and mount a tool on one of the two tool spindles according to the shape of a workpiece.

Still another object of the present invention is to improve the rigidity of a cutting part by providing two orthogonal tool spindles and selecting and mounting a tool on one of the two tool spindles according to the shape of a workpiece. And to provide a turning center that can shorten the processing time.

Still another object of the present invention is to provide a turning center having two tool spindles orthogonal to each other and capable of sharing a tool of one tool magazine with two tool spindles.

Still another object of the present invention is to provide a turning center capable of supplying a cutting fluid near the cutting edge even with a fixed tool.

[0011]

The present invention employs the following means to achieve the above object.

The turning center according to the first aspect of the present invention includes a bed as a base constituting a main body, a headstock provided on the bed, and a work spindle which is rotatably supported by the headstock and rotates the work. And a workpiece spindle drive for rotating and indexingly rotating the workpiece spindle, and provided so as to face the workpiece spindle, in a direction parallel to the workpiece spindle and in a direction orthogonal to the workpiece spindle. A spindle head having two tool spindles and capable of relatively moving the tool spindle with respect to the workpiece spindle in three orthogonal directions including axes of the two tool spindles, and a tool magazine for storing tools And an automatic tool changer for exchanging tools between the tool spindle and the tool magazine.

A turning center according to a second aspect of the present invention is the turning center according to the first aspect, wherein the turning center is a vertical turning center in which the workpiece spindle is arranged in a vertical direction.

A turning center according to a third aspect of the present invention is the turning center according to the first aspect of the invention, wherein the two tool spindles are each removably mountable with a turning tool or a rotary tool. I have.

The turning center according to a fourth aspect of the present invention is the turning center according to the third aspect, wherein the turning center is engaged with the turning tool mounted on the tool spindle to fix the rotation of the turning tool. It is characterized by having rotation direction fixing means provided respectively.

In a turning center according to a fifth aspect of the present invention, in the fourth aspect, the rotation direction fixing means is provided on the turning tool so as to be freely detachable from the positioning block provided on the spindle head, The turning tool is characterized in that the turning tool is engaged with the positioning block when the turning tool is mounted on the tool spindle, and an engaging portion for fixing rotation of the turning tool is provided.

According to a sixth aspect of the present invention, in the turning center according to the first aspect of the present invention, the tool magazine and the automatic tool changer are each one, and one of the tools is one of the tools 1, 2, 3, 4, and 5. The tool can be exchanged between the two tool spindles by a magazine and the automatic tool changer.

A turning center according to a seventh aspect of the present invention is the turning center according to the first aspect selected from the second, third, fourth, fifth, and sixth aspects, wherein the workpiece spindle includes a horizontal plane orthogonal to the workpiece spindle.
The spindle head is movable in the axial direction, and the spindle head is movable in the other two axial directions.

[0019]

Next, an embodiment of the present invention will be described. FIGS. 1, 2 and 3 show a first embodiment in which the machine tool of the present invention is implemented in a vertical turning center.

[Overall Configuration] FIGS. 1, 2 and 3 show the overall configuration of a vertical turning center according to the present invention.
Is a plan view of the vertical turning center, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a front view of FIG.

The vertical turning center according to the present invention comprises a machine body 1 which is a base constituting a machine tool body, and a work spindle head (hereinafter referred to as a spindle head) A provided on the machine body 1; A work spindle (hereinafter referred to as a spindle) B rotatably provided on the spindle head A, an automatic pallet changer Q for transferring a work pallet,
A column D fixed vertically provided on the machine main body 1, a tool spindle head E provided movably in a three-dimensional direction with respect to the spindle head A, and a column 2 provided on the tool spindle head E. A rotation transmission mechanism F for transmitting the rotational force of one motor to rotate the tool spindle, a tool magazine G for storing the tools, and an automatic tool exchange for exchanging tools between the two tool spindles and the tool magazine G And a device H.

A spindle B for performing turning and the like on the machine body 1
A pallet fixing portion 2 for fixing the pallet 3 is provided so as to be vertically movable. The spindle B rotates at a predetermined rotation speed when performing turning, and is controlled as a C-axis when a rotary tool is mounted on the tool spindle, moving to a predetermined rotation position, positioning, indexing, etc. The control such as interpolation with the axis is performed. The work is mounted on the pallet 3 and fixed. The pallet fixing section 2 can carry the pallet (pallet unclamping state) in the raised state, and enters the pallet clamp state in the lowered state.

The pallet guide 2 is parallel to and adjacent to the main shaft B.
a are arranged in two sets. The pallet guide 2a is a guide for engaging with the transported surface of the pallet, guiding the pallet 3 on the pallet fixing portion 2b, and moving the pallet 3 to the pallet fixing portion 2 of the spindle B. The pallet fixing portion 2b can carry the pallet (pallet unclamped state) in the up state, and enters the pallet clamp state in the down state.

A pallet conveying means 2c is arranged between the two pallet guides 2a, 2a and the pallet fixing portions 2b, 2b. An engaging portion (not shown) of the pallet transporting means 2c is disengaged from an engaged portion (not shown) provided on the pallet 3 and moved to a predetermined pallet changing position. The pallet 3 is carried in and out between the pallets 2b and 2b. After all, the two pallet guides 2a, 2
a, pallet fixing parts 2b, 2b and pallet conveying means 2
c constitutes an automatic pallet changer Q. The structure and function of the automatic pallet changer Q are known, and a detailed description thereof will be omitted.

The pallet 3 on which the work is mounted and which is fixed to the main shaft B is rotatable around a C-axis which is the axis of the main shaft B, and is movable in the X-axis direction.
The tool spindle head E supported by the column D can move up and down in the Z-axis direction, and the column D can move in the Y-axis direction. X, Y, and Z are a right-handed rectangular coordinate system having three axes. The Z axis is the axis direction of the main axis B and is a vertical axis.

Two tool spindles 6, 7 orthogonal to each other are provided in the tool spindle head E. The axis 6a of one tool spindle 6 is parallel to the Z axis. The axis 7a (see FIG. 4) of the other tool spindle 7 is orthogonal to the Z axis and parallel to the Y axis. The rotation of the tool spindle 6 and the tool spindle 7 is transmitted by a rotation transmission mechanism F described below.

[Rotation Transmission Mechanism F] A rotation transmission mechanism F for rotating the tool spindle 6 and the tool spindle 7 is shown in FIG. The rotation transmission mechanism F is provided in the tool spindle head E. The rotation transmission mechanism F includes a built-in motor, a transmission gear group, and a bevel gear for axial direction conversion.

A motor 11 consisting of a stator and a rotor is built in the main body of the tool spindle head E, and constitutes a so-called built-in motor. The output shaft 12 of the motor 11 is arranged vertically. Output shaft 12
Are formed integrally with the tool spindle 6. The lower end of the tool spindle 6 is formed as a spindle end 13 that can hold a tool.

At the lower end of the tool spindle 6, a tapered hole 13a for mounting and holding a tool shank 14 of a tool is formed. A spring member such as a draw bar 14c for holding a pull stud 14a screwed into the tool shank 14, a collet 14b on the tip side of the draw bar 14c, a coned disc spring for generating a clamping force, and a coil spring are provided in the tool spindle 6. 14d and the like.

In this embodiment, the collet-type tension mechanism has been described. However, a ball-type tension mechanism or a two-surface constraint type tool clamp mechanism may be used. The drawbar 14c is urged by a spring member 14d in a direction in which it is constantly clamped, that is, in a direction in which it is pulled in a vertical direction (upward in the drawing). That is, tool shank 1
4 is pressed by the tapered hole 13a of the spindle end 13 to be in a clamped state. A well-known unclamping cylinder (not shown) that operates at the time of tool unclamping is provided above the drawbar 14c. These members constitute a tool clamping and unclamping mechanism.

A gear 15 is coaxially fixed to the upper end of the output shaft 12. On the other hand, the driven shaft 16 is
It is rotatably supported inside. The driven shaft 16 is arranged parallel to the output shaft 12 and oriented vertically.
A gear 17 is coaxially key-fixed to the upper end of the driven shaft 16. The gear 15 and the gear 17 mesh with a gear 18 fixed to an intermediate shaft (not shown), and rotation is transmitted from the gear 15 to the gear 17.

Rotation is transmitted to the other tool spindle 7 from the driven shaft 16 via a bevel gear fixed to the tool spindle 7 by a bevel gear 19. The tool spindle 7 has the above-described rotation axis 7a oriented horizontally. For the tool spindle 7,
A tool clamping and tool unclamping mechanism is provided similarly to the tool spindle 6 (not shown). After all, the tool spindle 6 and the tool spindle 7 are the same built-in motor 1
1 is driven to rotate. As described above, the two-tool spindle,
A tool spindle rotation drive system for interlocking rotation composed of rotation transmission means and drive means is configured.

A turning tool (fixed tool) for turning is attached to and detached from the tool spindles 6 and 7 in addition to the rotating tool. The turning tool becomes a fixed tool by engaging the engaging portion with the end of the tool spindle head E, and can perform turning. Details of this mechanism will be described later.

[Tool Magazine G] FIG. 5 shows a tool magazine G of the vertical turning center. FIG. 5 shows a part of FIG. 1 in more detail, and shows the positional relationship between the tool magazine G and the automatic tool changer H in more detail. The structure and function of the tool magazine G itself is a known technique, and a chain rotating type, a disk rotating type, and a matrix type are well known.

In this embodiment, a plurality of tools are held in a chain by a tool holder 23 such as a tool pot. The tool holder 23 can be stopped at a tool changing position (not shown) with high accuracy. 5 is parallel to a horizontal plane, that is, an XY plane in the mechanical system. The plane including the movement area of the chain of the tool magazine G is a vertical plane. The tool 26
It is held by the tool holder 23.

[Automatic Tool Changer H] FIG. 5 shows an automatic tool changer H of a vertical turning center, which has a tool magazine G.
The positional relationship is shown. Automatic tool changer H
This is for exchanging tools between the tool magazine G and the tool spindles 6, 7. The automatic tool changer H is a first swivel for rotating (swinging) the entire automatic tool changer H between the side where the tool magazine G is arranged and the side where the tool spindles 6 and 7 are arranged. Means H2 is provided.

The automatic tool changer H has a change arm R for gripping a tool at both ends, and grip means H1 for gripping the tool are provided at both ends of the change arm R (see FIG. 10). . Further, the automatic tool changer H holds the gripping means H1 on the tool spindles 6, 7 side or the tool magazine G side while the first turning means H2 is stopped, and the tool spindles 6, 7
A first reciprocating means H3 is provided which can reciprocate by guiding along a straight line a distance that can be disengaged from the tool mounted on the tool or the tool held by the tool holder 23 (FIG. 5).
reference).

Further, the automatic tool changer H can turn the gripping means H1 by an angle perpendicular to the two tool spindles 6, 7 while the first turning means H2 and the first reciprocating means H3 are stopped. A second turning means H4 is provided.
By the second turning means H4, the angle between the tool spindle 6 and the tool spindle 7 arranged orthogonally at 90 degrees is swung, and it is possible to cope with each tool change.

Further, the automatic tool changer H includes a gripper H
And a third reciprocating means H8 for linearly moving 1 by the distance between the two tool spindles 6 and 7 (see FIG. 9). Since the automatic tool changing device H includes the second turning means H4 and the third reciprocating means H8, the tool spindle 6, the tool spindle 7, which are arranged at a 90-degree orthogonal and separated distance, and a tool magazine. The tool exchange with the G can be performed by one automatic tool changer H.

Further, the automatic tool changer H is provided with a gripper H1 in a state where the first revolving means H2, the first reciprocating means H3 and the second revolving means H4 are stopped. , 7 side, the direction of the holding axis of the holding axis for holding the tool by the tool magazine G on the plane orthogonal to the center axis of the first turning means H2 and the tool spindles 6, 7 of the tool spindles 6, 7
The second reciprocating means H5, the gripping means H1, and the third revolving means H6 for inverting the positions of the gripping means H1 by 180 degrees and exchanging the positions of the second reciprocating means H5 and the gripping means H1 which can be guided in the respective directions to reciprocate.
Contains.

[First Turning Means H2 of Tool Changer H] As shown in FIG.
It is fixed on the main body of the tool magazine G. Note that the turning support table 31 may be fixed to the machine body 1. Both ends of a first turning center shaft 32 are vertically supported on the turning support table 31. The first rotating body 3 has a first rotating body 3
4 is rotatably supported.

One end of a rotating arm 33 provided on the first rotating body 34 is fixed to a piston rod of a first rotating driving means 33a, and the first rotating body 34 is turned by the first rotating driving means 33a. Is done. First rotation driving means 33a
Is a driving means which can be selectively driven to three positions and positioned. The first rotation driving means 33a is a hydraulic cylinder 3
3b, 33c, and any one of three positions selected from the three positions of the position 21A on the tool magazine G side, the standby position 21B which is an intermediate position, and the position 21C on the tool spindle side by the reciprocating operation of the piston rod. The turning positioning is possible.

[First reciprocating means H of tool changer H]
3] The first reciprocating means H3 of the tool changer H moves the tool held by the tool spindles 6, 7 or the tool magazine G in a direction orthogonal to the tool axis, and in a state of gripping and releasing gripping. This is a mechanism capable of engaging and disengaging the gripping means H1 and the flange portion of the tool shank. The first reciprocating means H3 is mounted on the first rotating body 34.

The first reciprocating means H3 includes a first rotating body 34.
And a first reciprocating motion driving means (fluid pressure cylinder) 35a.
The first linear moving body 36 is moved with respect to. The first linear motion body 36 moves on a straight line included in the XY plane or the horizontal plane. The first reciprocating means H3 can reciprocate by guiding the tool mounted on the tool spindles 6 and 7 or the tool held by the tool holder 23 on a straight line by a distance capable of being disengaged. .

[Second Revolving Means H4 of Tool Changer H] A second revolving table main body 37 is provided on both sides of the first linear moving body 36 as shown in FIG. Second turntable body 37
In addition, a second rotating body 38 is provided rotatably (also referred to as swinging or turning). The second rotating body 38 can rotate at least 90 degrees on the ZY plane or a plane parallel thereto, and the rotation axis 39 of the second rotating body 38 is oriented horizontally, and the first rotating means H2 When turned to the tool spindle side position 21c (the state of FIG. 5), it is oriented in the X-axis direction.

FIG. 6 is a side view of the second turning means H4, each of which is shown in more detail than FIG. The second swivel shaft 41 having the swivel axis 39 is connected to the second swivel base body 37.
Penetrates. Second turntable main body 37 and second rotating body 38
Are rotatably (rotating or swinging) connected via a second turning shaft 41.

A part of the second rotating body 38 is
2 is formed. A piston rod, which is a drive end of a second turning drive means (fluid pressure cylinder) 43, is rotatably connected to the rotation drive end 42. One end of the second turning drive means 43 is swingably supported by the second turntable main body 37 by a swing shaft 43a.

[Second reciprocating means H of tool changer H]
5] The exchange arm R is movably attached to the second rotating body 38. The exchange arm R is a spline shaft 55
And is driven by the second linear drive means 52 (fluid pressure cylinder) (see FIG. 8). Exchange arm R
Can move in the direction orthogonal to the pivot axis 39, that is, in the direction of the pivot axis 55a of the spline shaft 55.

The moving distance S is shown as a distance S in FIG. This distance S will be described later. Second rotating body 38
The stationary side of the second linear drive means 52 is fixed to the second linear drive means 52.
The movable side (piston rod) 53 of the second linear drive means 52
Are connected to the exchange arm R side.

[Third Turning Means H6 of Tool Changer H] The change arm R can also turn with respect to the second rotating body 38. This turning is performed by the tool magazine G or the tool spindle 6,
The tool is to be turned by 180 degrees in order to exchange a tool which has been processed in step 7 with a tool to be used for processing. The exchange arm R pivots around the pivot axis 55a (see FIGS. 5 and 7).

As shown in FIG. 5, especially FIG. 7, a third linear driving means (fluid pressure cylinder) 61 is fixedly provided on the second rotating body 38. The pinion 62 is rotatably supported by the second rotating body 38. The rotation axis of the pinion 62 coincides with the turning axis 55a. Pinion 62
Are engaged with the rack 61a driven in the linear direction by the third linear driving means 61.

A pinion shaft 63 to which the pinion 62 is fixed by a key is engaged with the second linear moving body 52 via an engaging member (spline shaft 55, spline hole).
That is, it enables the exchange arm R to move forward and backward in the axial direction of the pivot axis 55a and to pivot around the pivot axis 55a.

[Grip Means H1 of Tool Changer H] FIG.
Indicates the holding means H1 together with the third reciprocating means H8. The third reciprocating means H8 is a tool holding means H1.
Is driven in the direction in which the exchange arm R extends and contracts so as to correspond to the tool spindle 6 and the tool spindle 7. The holding means H1 is attached to the third reciprocating means H8. The third reciprocating means H8 includes a fourth linear driving means (fluid pressure cylinder) 74 and a reciprocating body 71 driven in a linear direction by the fourth linear driving means 74.
The reciprocating body 71 is movable on the exchange arm base 51.

The reciprocating body 71 has gripping portions 72A and 72B at both ends for gripping a tool.
The center line of rotation of the exchange arm base 51, the reciprocating body 71, and the like, which is turned by the third turning means H6, is a turning axis 55a, as shown in FIG. Replacement arm base 5
1. The exchange arm R is formed by the gripping means H1 and the third reciprocating means H8.

The gripping portions 72A and 72B are formed in a semicircular shape for gripping a tool. Gripping parts 72A, 7
2B is provided with falling prevention claws 73A and 73B. When the tool is exchanged between the tool spindle 7 and the tool magazine G, the grip portions 72A and 72B move to the position A (reduced grip position) where the piston rod of the fourth linear drive means 74 has moved in the reduction direction. .

When the tool on the tool spindle 6 is changed, the piston rod moves to the position B (extended gripping position) where the piston rod has moved in the extending direction. This difference L in the distance is the distance between the two tool spindles 6 and 7. A linear guide member 51 is provided between the exchange arm base 51 and the reciprocating body 71 of the exchange arm R.
a, 51b are provided, and the reciprocating body 71 moves while being guided by the linear guide members 51a, 51b. The fixed portions of the fourth linear driving means 74, 74 are fixed to the exchange arm base 51 via fixing members 51c. A piston rod, which is a movable part of the fourth linear driving means 74, 74, is fixed to the reciprocating body 71 via a mounting member 71a. That is, the reciprocating body 71 is connected to the fourth linear driving means 74.
Is reciprocated by the drive of. At the tip of the reciprocating body 71, gripping portions 72A, 72B of the gripping means H1 are integrally formed.

FIGS. 9 and 10 (a) and 10 (b) show the gripping means 81 on the reciprocating body 71 for gripping the tool with the stopper 73A, ie, releasing the tool lock. 10 (a) and 10 (b) are plan views of FIG. 9, FIG. 10 (a) shows grip release means 81 on the tool magazine G side, and FIG. 10 (b) is grip release means on the tool spindle side. It is.

The grip releasing means 81 is constituted by a substantially quadrilateral parallel link 82. Quadrilateral parallel link 82
Are two movable shafts 83, 83 and two immovable shafts 84, 84.
Form a parallelogram parallel link. Fixed shaft 84
Are swingably supported by the reciprocating body 71. FIG.
As shown in FIG. 7, the immobile shaft 84 extends through the reciprocating body 71 to the opposite side.

Working arms 86 and 87 with immobile shaft 84 as a base axis.
Rotates (oscillates) in response to the displacement of the grip release means 81. Rollers (cam followers) 89, 91 are provided at the operating ends of the working arms 86, 87, respectively. On the other hand, an operation arm 92 is fixed to one end of the immobile shaft 84. A grip release arm 94 is swingably supported by the reciprocating body 71.

At one end of the grip release arm 94, a drop prevention claw 73A for preventing the gripped tool from dropping is formed. The other end of the grip release arm 94 is engaged with the other end of the operation arm 92. The grip release means 81 is in a position where the grip release arm 94 is normally engaged by the force of the spring 95, ie,
A is positioned to lock the tool.

On the main body side of the tool magazine G, an operation inclined body (cam or dog) 96 is fixed to a predetermined position of the tool magazine G (see FIG. 5). Also, the second rotating body 38
The operation inclined body 91a is fixed to the. The reciprocating body 71 of the exchange arm R retreats in the direction of the pivot axis 55a to the magazine-side tool exchange position 21A shown in FIG.
At the position where the revolving means H3 turns to the tool magazine G side, the rolling wheel 89 is located at the top of the operation inclined body 96.

In such a positional relationship, the working arm 87 and the movable shaft 83 are rotationally displaced against the spring force of the spring 95, and as shown in FIG. Is disengaged. In this state, the falling-off preventing 73A (or 73B) is positioned in the tool gripping direction by the shaft 94a pressed by the spring force of the spring 94b. However, since the spring force of the spring 94b is weakened, the gripping means H1 is moved in the direction of FIG.
When it is moved, it is easily disengaged from the flange of the tool.

At the tool spindle side tool change position 21C (see FIG. 5), the following is performed. When the tool is exchanged with the tool spindle 7, the third reciprocating means H8 positions both the gripping portions 72A and 72B at the position A (the position where the piston rod is reduced). This reduced state is referred to as a standard arm state.

When the exchange arm R including the exchange arm base 51, the reciprocating body 71 and the like as shown by the solid line in FIG.
1a and the rolling wheel 89 of the working arm 87 are engaged, the grip portion (for example, 72A) on the tool spindle 7 side is in a tool grip release state, and the grip portion on the opposite side of the tool spindle 7 (grip holding a new tool) Portion, for example, 72B), maintains the tool gripping state. That is, no problem occurs even if the exchange arm R is transported at a high speed.

Similarly, when the tool is changed between the tool spindle 6 and the tool spindle 6, the third reciprocating means H8 moves both the gripping portions 72A and 72B to the position B (the position where the piston rod is extended). I have. This state is referred to as a long arm state. When the reciprocating body 71 is retracted in the direction of the pivot axis 55, the operation inclined body 91a and the rolling wheel 91 of the working arm 86 are engaged, and the gripping portion on the tool spindle 7 side is set to the tool grip release state, The tool gripping state of the gripping part on the opposite side of the tool spindle 7 is maintained (state of FIG. 11A).

The gripping released state is determined by the exchange arm base 5
1. When the exchange arm R including the reciprocating body 71 and the like moves forward in the direction of the pivot axis 55a, the rolling wheel 91 of the working arm 86 or the rolling wheel 89 of the working arm 87 is separated from the operation inclined body 91a. The combined state is released, and the gripping portions 72A, 72B
In both cases, the strong spring force of the spring 95 causes the drop-off preventing claws 73A, 73B via the operating arm 92 or the like.
Is in a gripping state.

As described above, the tool can be held or released regardless of whether the tool is replaced with any one of the tool spindles 6 and 7. In the grip release state, if a force greater than the spring force of the spring 94b pressing the shaft 94a is applied to the fall prevention claw 73A, the fall prevention claw 73A rotates in the release direction.

Therefore, when the operation inclined body 96 and the rolling wheel 89 are engaged with each other, the flange of the tool inserted into the gripping portion (for example, 72A) of the gripping means H7 on the tool spindle 6 and the tool spindle 7 side. The gripping portion 72a can be detached from or gripped from a portion (gripped portion). That is, the tool spindle 6,
The gripping means H7 on the tool spindle 7 side is released or gripped.

When there is no such positional relationship, that is, when the reciprocating body 71 is moving forward in the axial direction of the turning axis 55a, the operating arm 92 and the grip release arm 94 are connected to the spring 95 by the spring 95. The tool is urged and engaged by force, and forcibly presses the falling-off preventing claw 73A in the gripping direction to prevent the tool from falling off. The function of the drop prevention claw 73B is the same as the function of the drop prevention claw 73A.

Also when the reciprocating body 71 moves by the distance L shown in FIG. 10, the rolling wheel 91 is positioned at the top of the operating inclined body 91a, and the gripping state is released. This distance L is designed to be equal to be equal to the distance between the two tool axes 6,7.

[Outer Diameter Machining Tool Holder 110] FIG.
FIG. 12 shows an external diameter machining tool holder. The outer diameter machining tool holder 110 shows the outer diameter machining tool holder 110 for the tool spindle 7 which is mounted and fixed to the tool spindle 7 whose axis is arranged in the horizontal (lateral) direction. FIG.
FIG. 15 is a right side view of FIG. Tool shank 11
The first tapered portion 112 is inserted into a tapered hole of the tool spindle 7 and is mounted and fixed.
It is a standardized one having the same shape as. A pull stud (not shown) is screwed into the tool shank 111 and is clamped by a tool clamping mechanism in the tool spindle 7.

A first bite fixing groove 116 and a second bite fixing groove 117 orthogonal to the first bite fixing groove 116 are formed in the bite holder main body 114 in a direction orthogonal to the axis 7a of the main shaft.
In the first bite fixing groove 116, a bit for roughing (hereinafter, referred to as a roughing bit) 118 is mainly fixed with a bolt 120 or a set screw. A finishing bit (hereinafter referred to as a finishing bit) 119 is provided in the second biting fixing groove 117.
Are fixed with bolts 120.

A cutting oil passage 121 through which the cutting oil flows is formed in the tool holder main body 114. Cutting oil passage 1
21 is connected to two nozzles 122. The nozzle 122 includes a roughing bite 119 and a finishing bite 118.
Cooling and lubrication of the cutting part is performed by injecting cutting oil into the tip at the end of the cutting oil. Extension 125 of tool holder body 114
, A positioning member 126 for supplying a cutting oil is provided in parallel with the axis of the tapered portion 112. The positioning member 126 is slidably inserted into a positioning member insertion hole 124 provided in the extension 125 of the tool holder main body 114.

The positioning block 140 provided on the spindle head E of the positioning member 126 (hereinafter referred to as one side)
, A positioning engagement portion 128 is integrally formed.
A tapered surface 129 is formed on the positioning engagement portion 128,
The tapered surface 129 has a shape in which a portion not in contact with the positioning block 140 is shaved. The tapered surface 129 is a part of a taper about the axis of the positioning member 126.

The positioning member 126 has a cutting oil passage 1
A stepped hole 30 is formed, and a coil spring 131 is inserted into the hole on the other side. The cutting oil passage 130 communicates with the cutting oil passage 121 described above. Reference numeral 128C denotes a stopper that regulates the position of the positioning member 126 and the positioning engagement portion 128 in the rotation direction and also serves as a stopper for the movement stroke in the axial direction.

One end of the coil spring 131 is in contact with the positioning member 126, and the other end is in contact with the lid 133 fixed to the tool holder body 141 with bolts 134. Therefore, the positioning member 126 is provided with the positioning member insertion hole 124.
And is slidably inserted in one side, urged in the direction of one side, and when not engaged with the positioning block 140, abuts against the stopper 128C and stops.

An engaging member 127 is inserted into the other hole of the positioning member 126. Between the other hole of the positioning member 126 and the engagement member 127, the coil spring 12
8a is provided, and constantly urges the engaging member 127 to one side with respect to the positioning member 126. The sealing member 128b serves as both a stopper and a cutting oil seal.
It is a sealing member such as a ring and a lip packing. The sealing member 128b allows the engaging member 127 to move within the inner circumferential groove formed in the positioning member 126 by a predetermined stroke and not to come out.

[Positioning Block 140] FIG.
(A), (b) shows a positioning block. The positioning block 140 is fixed to the end surface 141 (see FIG. 3) of the tool spindles 6 and 7 of the tool head E. The positioning block 140 is engaged with the positioning block 128 of the outer diameter machining tool holder 110 to determine the position of the outer diameter machining tool holder 110 in the rotation direction and regulate the rotation. The positioning block body 142 is integrally formed, and has a first concave portion 143 formed therein.

Both side surfaces of the first concave portion 143 are inclined surfaces 144.
Are formed. The inclined surface 144 has a tapered surface 129 of the positioning engagement portion 128 of the outer diameter machining tool holder 110.
Engage. The contact between the inclined surface 144 and the tapered surface 129 is firmly and accurately positioned and fixed due to the tapered connection biased by the coil spring 131. A second recess 145 is further formed on the bottom surface of the first recess 143.

A cutting oil supply hole 146 is formed at the center of the bottom surface of the second recess 145. An O-ring groove 147 is provided on the outer periphery of the cutting oil supply hole 146 on the bottom surface of the second concave portion 145.
Are formed. The O-ring groove 147 has the O-ring 14
8 are inserted and arranged. The front end surface of the engagement member 127 contacts the O-ring 148 by the urging force of the coil spring 128a to prevent leakage of cutting oil. The O-ring 148 may be another sealing member such as a lip packing.

The positioning block main body 142 is
At 50, it is fixed to the lower end surface 141 of the tool head E (see FIG. 4). After all, the positioning block 128 of the external diameter machining tool holder 110 and the lower end surface 141 of the tool head E
The positioning block 140 constitutes a rotation direction fixing means 155 in which the external diameter machining tool holder 110 does not cause relative rotational movement with the tool head E.

The above-mentioned outside diameter machining tool holder 110
Has been described as the external diameter machining tool holder 110 mounted and fixed to the tool spindle 7 whose axis is arranged in the horizontal (horizontal) direction, and the rotation direction fixing means 155 for that purpose has been described. The tool attached and fixed to the tool spindle 6 whose axis is arranged in the vertical (vertical) direction has substantially the same structure as the outer diameter machining tool holder 110, and is also provided near the tool spindle 6 of the spindle head E. Although a positioning block 140a is provided, its description is omitted. However, the tool spindle 6 is provided with an inner diameter machining tool holder that can mainly fix an inner diameter machining boring tool among the turning tools (fixed tools) for turning.

In this case, the positioning block 140 merely replaces the positioning block 140a of the tool spindle 6. That is, the turning tool (fixed tool) such as the outer diameter machining tool holter 110 and the inner diameter machining tool holder is attached to either the tool spindle 6 or the tool spindle 7 by the automatic tool changer H from the common (one) tool magazine G. Can also be installed.

Further, a rotary tool such as a drill, a tap, an end mill, a boring bar and the like, which rotates and performs machining, is mounted on the tool spindles 6 and 7. That is, the rotary tool can be mounted on either of the tool spindles 6 and 7 by one tool magazine G and the automatic tool changer H, and so-called five-side machining can be performed. Such a rotating tool is a known tool commonly used in machining centers and will not be described further here. Further, a tool called an oil hole tool is mounted on the tool spindles 6 and 7. In the oil hole tool, the positioning pin of the oil hole tool is engaged with the second concave portion 145 of the positioning block 140,
This is the same usage as a known oil hole tool in which the cutting oil is supplied from the spindle head E side to the oil hole tool side, and will not be described further here.

[Tool Change Operation Between Tool Magazine G and Automatic Tool Changer H] In the above structure, a tool change operation between the tool magazine G and the automatic tool changer H will be described. The automatic tool changer H stands by at a normal standby position (automatic tool changer origin) 21B (see FIG. 5). The first turning means H2 moves the first rotating body 34 to the standby position 2
1B, the second turning means H4 positions the second rotating body 38 in the horizontal direction, and the second reciprocating means H5 positions the exchange arm base 51, that is, the exchange arm R, at the retracted position. Also,
The state of the first reciprocating means H3 is such that the second turntable main body 37 is positioned on the tool magazine G side.

Further, an old tool to be returned to the tool magazine G (a tool whose machining has been completed) is provided in the tool magazine side gripping portion.
Is held. Further, the third reciprocating means H8
Is a standard arm state (position A: reduced gripping position) in which the gripping portions 72A and 72B are close to each other with respect to the pivot axis 55a (see FIG. 10). When a tool change command with the tool magazine G is issued, the second reciprocating means H5
Moves the exchange arm R to the forward position through the exchange arm base 51.

Next, the first turning means H2 is connected to the first rotating body 3
Then, the change arm R is turned to the tool magazine side tool change position 21A via the position 4. At the same time, the tool magazine G finds out a predetermined tool pot holding the returned old tool in the tool magazine tool changer. Next, the second reciprocating means H
5 moves the exchange arm R to the retracted position, inserts the old tool into the tool pot, and holds it by the clamp mechanism in the tool magazine G. At this time, since the operation inclined body 96 and the rolling wheel 89 of the working arm 87 are engaged, only the tool magazine side grip portion is in the tool grip release state.

The exchange arm R is moved toward the tool spindle (in this state, in a direction away from the tool magazine G) by the first reciprocating means H3 through the second swivel main body 37, so that the gripping portion is replaced with the old one. Move in the radial direction of the tool,
Remove the grip part on the tool magazine side from the flange part of the tool shank of the old tool.

The tool magazine G calls a predetermined tool pot holding the commanded new tool to a tool magazine tool change position. By moving the exchange arm R to the tool magazine G side by the first reciprocating means H3, the grip portion is moved in the radial direction of the new tool, and the exchange arm is attached to the flange portion (gripped portion) of the tool shank of the new tool. The tool magazine side grip portion of the grip portion of R is inserted and engaged.

The second reciprocating means H5 moves the exchange arm R to the forward position, whereby the new tool is released from the tool pot in the axial direction of the tool. At this time, since the rolling wheel 89 of the working arm 87 is separated from the operation inclined body 96, the tool magazine side gripping portion is in the tool gripping state, and high-speed conveyance is possible.

The first turning means H2 turns the exchange arm R via the first rotating body 34 to the standby position. After turning, the second
The reciprocating means H5 moves the exchange arm R to the retracted position, and returns to the standby state in which the new tool is held by the tool magazine-side holding portion.

[Tool change operation between the tool spindle 7 and the automatic tool changer H] The automatic tool changer H holds the new tool in the tool magazine side holding portion at the standby position (automatic tool changer origin) 21B. The description will be made assuming that the user is in a state of being. Also, a tool spindle head E supporting the tool spindle 6 and the tool spindle 7.
Has moved to the tool change position. Further, the third reciprocating means H8 is in a standard arm state (position A) in which the gripping portions 72A, 72B are close to the pivot axis 55.

The shutter (not shown) is opened to allow the automatic tool changer H to move to the machining area. The first turning means H2 turns the exchange arm R from the standby position 21B to the tool spindle side position 21C via the first rotating body 34.
The first reciprocating means H3 moves the second turntable main body 37 toward the tool spindle.

At this time, since the operation inclined body 91a and the rolling wheel 89 of the working arm 87 of the tool spindle side grip portion are engaged, the tool spindle side grip portion is in the tool grip release state. Therefore, the tool spindle side gripping portion is inserted into and engaged with the flange portion of the tool shank of the old tool mounted on the tool spindle from the radial direction of the tool. The tool clamping / unclamping means of the tool spindle 7 is set to the unclamping state.

The second reciprocating means H5 is provided with the exchange arm base 5
The exchange arm R is moved to the forward position through 1 and the old tool is separated from the tool spindle 7 in the axial direction of the tool spindle 7.
At this time, since the rolling wheel 89 of the working arm 87 of the tool spindle side gripping part is separated from the operation inclined body 91a, the tool spindle side gripping part is in the tool gripping state, and high-speed conveyance is possible.

The gripping portions 72A and 72B of the exchange arm R are rotated by 180 degrees by the third pivoting means H6 so that the gripping portion holding the new tool is on the tool spindle side and the gripping portion holding the old tool is on the tool spindle side. Position it on the tool magazine side. That is, the positions of the new and old tools have been switched. The exchange arm R is positioned at the retracted position by the second reciprocating means H5, and a new tool is inserted into the tool spindle 7 in the axial direction of the tool spindle 7.

The tool clamping and unclamping means of the tool spindle 7 is set in the clamp state, and a new tool is mounted on the tool spindle 7. Further, when the exchange arm R moves to the retreat position, the operation inclined body 91a and the rolling wheel 89 of the working arm 87 of the tool spindle side grip portion are engaged, so that the tool spindle side grip portion is in the tool grip release state. Becomes

The first reciprocating means H3 moves the exchange arm R to the tool magazine G side, moves the exchange arm R in the radial direction of the new tool, and moves the tool spindle of the exchange arm R from the flange of the tool shank of the new tool. Release the side grip.
The exchange arm R is pivoted from the tool spindle side tool exchange position to the standby position by the first pivot means H2. The shutter is closed, the processing area is blocked, and processing with a new tool is started.

[Tool change operation between the tool spindle 6 and the automatic tool changer H] The automatic tool changer H holds the new tool at the standby position (automatic tool changer origin) 21B at the tool magazine side holding portion. The description will be made assuming that the user is in a state of being. It is also assumed that the tool spindle 6 has moved to the tool change position. Further, the gripping portion of the third reciprocating means H8 has a pivot axis 55
Are in the standard arm state (position A) approaching each other.

The shutter (not shown) is opened, and the automatic tool changer H can be moved to the machining area. The first turning means H2 turns the exchange arm R from the standby position 21B to the tool spindle side position 21C via the first rotating body 34.
By the second turning means H4, the new tool held by the exchange arm R is turned via the second rotating body 38 so that the axis of the new tool is oriented in the vertical direction.

Also, the third reciprocating means H8 causes the gripping portion on the tool spindle 6 side to be in a long arm state in a direction away from the pivot axis 55 (position B: extended gripping position).
And At this time, the engagement between the operation inclined body 91a and the rolling wheel 89 of the working arm 87 of the tool spindle side grip portion is released,
When the arm is in the long arm state, the wheel 9 of the working arm 86
1 and the operation inclined body 91a are engaged with each other, so that the tool spindle side grip portion is in the tool grip release state.

The first reciprocating means H3 is the second turntable main body 3
The exchange arm R is moved to the tool spindle 6 side via.
The tool spindle side grip portion is inserted into and engaged with the flange portion of the tool shank of the old tool attached to the tool spindle 6 from the radial direction of the tool. The tool clamping / unclamping means of the tool spindle 6 of the tool spindle 6 is set to the unclamping state.

The second reciprocating means H5 moves the exchange arm R to the forward position, and moves the old tool from the tool spindle 6 to the tool spindle 6.
In the axial direction. At this time, the operation inclined body 91a
Since the rolling wheel 89 of the working arm 87 of the grip portion on the tool spindle side is further separated, the grip portion on the tool spindle side is in a tool grip state, and high-speed conveyance is possible.

The tool spindle 6 is moved by the third reciprocating means H8.
Position the grip on the side in the standard arm state. By the third turning means H6, the gripping means 72A, 72 of the exchange arm R are provided.
B is rotated by 180 degrees, so that the grip portion holding the new tool is positioned on the tool spindle side, and the grip portion holding the old tool is positioned on the tool magazine side. That is, the positions of the new and old tools have been switched.

The tool spindle 6 is moved by the third reciprocating means H8.
The side gripping part in the long arm state. With the second reciprocating means H5, the replacement arm R is positioned at the retracted position, and a new tool is inserted into the tool spindle 6 in the axial direction of the tool axis 6. The tool clamping / unclamping means of the tool spindle 6 is set in a clamp state, and a new tool is mounted on the tool spindle 6.

When the exchange arm R is moved to the retracted position, the operating inclined body 91a is engaged with the rolling wheel 89 of the working arm 87 of the tool spindle side gripping part, so that the tool spindle side gripping part is in the tool spindle side gripping part. It will be in the grip release state. First reciprocating means H3
Moves the exchange arm R toward the tool magazine G via the second swivel base body 37, moves the tool spindle side gripping portion in the radial direction of the new tool, and grips the tool spindle side from the flange portion of the tool shank of the new tool. Remove the part.

The gripping portion is positioned in the standard arm state by the third reciprocating means H8. By the second turning means H4, the new tool held by the exchange arm R is turned via the second rotating body 38 so that the axis of the new tool is oriented in the horizontal direction. The exchange arm R is pivoted from the tool spindle side tool exchange position 21C to the standby position 21B via the first rotating body 34 by the first pivoting means H2. The shutter is closed, the processing area is cut off, and processing is started by a new tool.

[Fixing Function of Rotational Direction Fixing Means 155] The tool spindle 7 has a new tool, an external diameter machining tool holder 110.
Is fixedly mounted. The positioning member 126 of the outer diameter machining tool holder 110 is slidably inserted into the positioning member insertion hole 124, and is urged by one side (the positioning block side fixed to the spindle head E) by the coil spring 131. ing. Therefore, when the positioning member 126 is mounted on the tool spindle 7, the positioning engagement portion 128 abuts against the inclined surfaces 144 and 144 of the positioning block 140, and the positioning member 126 moves to the other side against the urging force of the coil spring 131. . That is, the inclined surfaces 144 and 144 and the positioning engagement portion 128 are taper-coupled in a state where the inclined surfaces 144 and 144 are biased by the biasing force of the coil spring 131.

Similarly, the engaging member 127 is a coil spring 1
Since it is urged to one side by 28a, the front end face of the engaging member 127 presses the O-ring 148 of the positioning block 140 to prevent leakage of the cutting oil.

The contact between the inclined surface 144 and the tapered surface 129 is firmly and accurately positioned and fixed due to the tapered connection. The positioning block 128 of the outer diameter machining tool holder 110 and the positioning block 140 of the lower end surface 141 of the tool head E are in a rotational direction in which the outer diameter machining tool holder 110 does not cause relative rotational movement with the tool head E. The fixing means 155 is constituted.

[Working by Vertical Turning Center] The work is mounted on the pallet 3 on the pallet fixing portion 2b, and is conveyed to the work spindle B by the automatic pallet changer Q. The pallet 3 on which the workpiece is mounted is fixed to the pallet fixing portion 2 of the workpiece spindle B.

The tool magazine G accommodates various tools including a turning tool (fixed tool) for turning and a rotating tool for turning the tool.

When turning a workpiece, the workpiece spindle B is rotated at a predetermined number of revolutions, and the outer diameter of a turning tool (fixed tool) is attached to the tool spindles 6 and 7 by the automatic tool changer H. A machining tool holder 110 or an inner diameter machining tool holder is attached to perform machining. That is, the workpiece is turned relative to the outer diameter machining tool holder 110 or the inner diameter machining tool holder in the direction of the axis of the workpiece spindle and in the direction orthogonal to the axis of the workpiece spindle. I do. At this time, the positioning member 126 provided on the outer diameter machining tool holder 110 or the inner diameter machining tool holder and the tool spindle 6 of the tool spindle head E are used.
Alternatively, the positioning block 1 provided near the tool spindle 7
40, 140a are engaged with each other to
Is composed.

When turning the inside diameter of a workpiece,
An inner diameter machining tool holder is mounted on the tool spindle 6 for machining. When machining the outer diameter portion of the workpiece, the turning operation is performed by attaching the outer diameter machining tool holder 110 to the tool spindle 7. When the axial direction of the workpiece is short and the rigidity of the tool is not significantly reduced even when a boring bar type boring bar is used, an outer diameter machining may be performed by mounting a boring bar type tool holder on the tool spindle 6. Further, if the inner working bit holder and the outer working bit holder are used in combination, that is, if the inner working tool and the outer working tool are fixed to perform the working, the tool exchange time can be shortened, which is even better. When turning by attaching the tool holder 110 for external diameter machining to the tool spindle 7, the roughing tool 118 is fixed to the second tool fixing groove 117 during rough machining, and the first tool is used for finishing. It is preferable to fix the roughing cutting tool 119 to the fixing groove 114. That is, by adopting such an aspect, it is possible to improve the rigidity of the tool and the spindle system at the time of rough machining, and to reduce the influence of thermal deformation of the machine body at the time of finish machining. In addition, various turning processes such as an inner circumferential groove, an outer circumferential groove, an end face groove, an inner diameter screw, and an outer diameter screw can be performed on the inner and outer diameter portions and the upper end surface.

Also, a so-called five-side machining can be performed by attaching a rotary tool to the tool spindles 6 and 7. In this case, the rotating tool mounted on the tool spindle 6 or the tool spindle 7 is rotated at a predetermined number of revolutions, and the workpiece spindle B is a control axis capable of continuously controlling the rotation position or indexing as the C axis. In this way, the workpiece and the rotating tool are
In addition to performing relative movement control in the X, Y, and Z axis directions, the workpiece is rotationally indexed to a predetermined angular position to perform five-side machining. As a result, various processes such as drilling, tapping, flattening, and grooving can be performed on the upper surface, the outer peripheral surface, and the like of the workpiece. Since the positioning member 126 is not formed on the tool shank of the rotary tool, positioning blocks 140 and 140a provided near the tool spindle 6 or the tool spindle 7 of the tool spindle head E at the time of rotation of the rotary tool are provided. There is no interference.

When the tool mounted on and fixed to a tool spindle not used for machining among the tool spindles 6 and 7 may interfere with a workpiece or the like at the time of machining a workpiece, the tool spindle is not used. It is preferable that the above tool is replaced with a lid tool (see FIG. 14) and the lid tool is mounted and fixed on the tool spindle. As shown in FIG. 14, the lid tool 155 includes a tool shank 151 and a flange 152, and can prevent chips and cutting oil scattered during processing from adhering to the tapered surface, the front end surface, and the like of the tool spindle. In particular, in the case of a two-face restraint tool, it is necessary to prevent the front end face of the spindle from adhering. further,
The attachment of the positioning blocks 140 and 140a may be prevented with a lid tool.

Also, since an automatic pallet changer is attached, while the work on one pallet is being machined, the setup on the other pallet is changed, so that the operating rate of the turning center is reduced. Is not reduced.

[Other Examples] In this embodiment, a chain type tool magazine has been described, but the tool magazine may be a matrix type tool magazine. Furthermore,
The exchange arm R may be a single arm. Further, a turning center having a work spindle in a horizontal direction may be used.

[0119]

According to the turning center according to the present invention, both a fixed tool and a rotary tool, which are turning tools, can be mounted on two orthogonal tool spindles. In addition, a tool can be selectively mounted on any of the two tool spindles according to the shape of the workpiece. Furthermore, since one of the two tool spindles can be selected and the tool can be mounted in accordance with the shape of the workpiece, the rigidity of the cut portion can be improved, and the machining time can be reduced. Further, the tools of one tool magazine can be shared by two tool spindles. Further, there is an effect that a cutting oil can be supplied to the vicinity of the cutting edge of the fixed tool.

[Brief description of the drawings]

FIG. 1 is a plan view of a vertical turning center.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a sectional view of a tool spindle part.

FIG. 5 is a partially enlarged view of FIG. 1 and shows an automatic tool changer part.

FIG. 6 is a left side sectional view of a part of the tool changing device.

FIG. 7 is a rear view of a part of the tool changing device.

FIG. 8 is a partially enlarged view of FIG. 5, and is a front view showing an arrangement of a sensor for determining a rotational position of the tool changing device.

FIG. 9 is a plan view of the gripping means.

FIG. 10 is a rear view of a part of the gripping means.

FIG. 11 shows a tool holder for external diameter machining;
It is a front view.

FIG. 12 is a right side view of FIG. 14;

FIGS. 13A and 13B are views showing a positioning block.

FIG. 14 is a front view showing a lid tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Machine main body 6, 7 ... Tool spindle 11 ... Built-in motor 34 ... 1st rotating body 36 ... Linear moving body 38 ... 2nd rotating body 51 or 71 ... 2nd linear moving body E ... Tool spindle head G ... Tool magazine H ... Tool changer 71 ... Reciprocating body H1 ... Grip means H2 ... First turning means H3 ... First reciprocating means H4 ... Second turning means H5 ... Second reciprocating means H6 ... Third turning means H8 ... Third reciprocation Exercise means 110: Tool holder for external diameter machining 126: Pipe joint 140: Positioning block

Claims (7)

[Claims] A bed constituting a main body; a headstock provided on the bed; a work spindle supported rotatably on the headstock to rotate a work; and a work spindle. A workpiece spindle drive for rotating and indexing and rotating the workpiece spindle; and two tool spindles provided in a direction opposite to the workpiece spindle and in a direction parallel to the workpiece spindle and in a direction orthogonal to the workpiece spindle. A spindle head capable of relatively moving the tool spindle with respect to the workpiece spindle in three orthogonal directions including axes of the two tool spindles; a tool magazine for storing tools; and the tool spindle. A turning center, comprising: an automatic tool changer for changing a tool between the tool magazine and the tool magazine. 2. The turning center according to claim 1, wherein the turning center is a vertical turning center in which the workpiece spindle is arranged in a vertical direction. 3. The turning center according to claim 1, wherein a turning tool or a rotating tool is detachably attached to each of the two tool spindles. 4. The turning center according to claim 3, wherein the turning head is engaged with the turning tool mounted on the tool spindle to fix the rotation of the turning tool. A turning center, comprising: provided rotation direction fixing means. 5. The turning center according to claim 4, wherein said rotation direction fixing means is provided on a positioning block provided on said spindle head, said turning tool is provided on said turning tool so as to be freely disengageable from said positioning block. A turning center for engaging the positioning block when the tool is mounted on the tool spindle to fix the rotation of the turning tool. 6. The turning center according to claim 1, wherein the tool magazine and the automatic tool changer are one each, and one tool magazine and one automatic tool changer are provided. A turning center for the two tool spindles. 7. The turning center according to claim 1, wherein the workpiece spindle is movable in one axial direction including a horizontal plane orthogonal to the workpiece spindle. Head is another 2
A turning center characterized by being movable in the axial direction.