JP2010046777A - Machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machine tool capable of shortening time for delivering and receiving a workpiece between spindles and improving moving speed of a second spindle in the Z axial direction by making Z axial feeding mechanisms against a first spindle and the second spindle arranged face to face optimum. <P>SOLUTION: A problem that the first spindle cannot be properly driven in supplying a rod material of heavy weight to the first spindle can be avoided, as the machine tool 100 is constituted so that the second spindle 2 is free to move and the first spindle 1 cannot be moved in the X axial direction, Y axial direction, and the Z axial direction. Additionally, the receiving and delivering time of the workpiece W to the second spindle 2 from the first spindle 1 can be shortened, and the moving speed of the second spindle 2 in the Z axial direction can be improved, as two steps of the Z axial feeding mechanisms (a second Z axial feeding mechanism Z2 and third Z axial feeding mechanism Z3) are provided to the second spindle 2. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a machine tool including a first spindle and a second spindle that face each other.

As a machine tool, when three directions orthogonal to each other are taken as an X-axis direction, a Y-axis direction, and a Z-axis direction, respectively, a first spindle whose axis extends in the Z-axis direction, and a Z-axis direction with respect to the first spindle And a turret for holding a work held by the first spindle and a tool for processing the work held by the second spindle. Such machine tools include an X-axis feed mechanism that moves the turret in the X-axis direction, a Z-axis feed mechanism that moves the first spindle in the Z-axis direction, and an X-axis feed mechanism that moves the second spindle in the X-axis direction. And a Z-axis feed mechanism for moving the second spindle in the Z-axis direction. Therefore, the work held on the first spindle can be processed with the turret tool, and the work held on the second spindle can be processed with the turret tool (see Patent Document 1).
JP 2003-191102 A

  However, if the first spindle is configured to be movable in the Z-axis direction, there is a problem that when the material having a large weight is supplied to the first spindle, the first spindle cannot be driven properly.

  However, if the first spindle is made immovable and only the second spindle is movable in the Z-axis direction, when the workpiece is transferred from the first spindle to the second spindle, the moving distance of the second spindle becomes longer. Will result in longer delivery time. Further, when the workpiece held on the second spindle is machined by the turret tool, if the turret is moved at the maximum feed speed in the Z-axis direction while superimposing the second spindle and the turret, the second spindle is brought to the turret speed. There is a problem that cannot follow.

  In view of the above problems, an object of the present invention is to optimize the Z-axis feed mechanism for the first spindle and the second spindle that are arranged to face each other, thereby shortening the workpiece transfer time between the spindles, and the second spindle. An object of the present invention is to provide a machine tool that can improve the movement speed of the Z-axis in the Z-axis direction.

  In order to solve the above problems, in the present invention, when three directions orthogonal to each other are defined as an X-axis direction, a Y-axis direction, and a Z-axis direction, respectively, a first spindle having an axis extending in the Z-axis direction, A machine tool comprising: a second spindle that faces the spindle in the Z-axis direction; a work held by the first spindle; and a turret that holds a tool for machining the work held by the second spindle. A first X-axis feed mechanism that moves the turret in the X-axis direction, a first Z-axis feed mechanism that moves the turret in the Z-axis direction, and a second Z-axis feed mechanism that moves the second spindle in the Z-axis direction. And a third Z-axis feed mechanism that moves the second spindle in the Z-axis direction together with the second Z-axis feed mechanism, wherein the first spindle is in the X-axis direction, the Y-axis direction, and Characterized in that the Z-axis direction which is immovable.

  In the present invention, the second spindle is movable, but the first spindle is configured to be immovable in the X-axis direction, the Y-axis direction, and the Z-axis direction, so that a material having a large weight is supplied to the first spindle. May be. In addition, since a two-stage Z-axis feed mechanism (second Z-axis feed mechanism and third Z-axis feed mechanism) is provided for the second spindle, the movement speed of the second spindle in the Z-axis direction can be increased. This is advantageous in that the time for transferring the workpiece from the first spindle to the second spindle can be shortened.

  In the present invention, it is preferable to further include a second X-axis feed mechanism X2 for driving the second spindle in the X-axis direction. With this configuration, there is an advantage that the workpiece held on the second spindle can be processed only by controlling the second spindle. Therefore, on each of the first spindle side and the second spindle side, grooving, drilling, and turning can be performed independently and simultaneously on the workpiece.

  In the present invention, each of the second Z-axis feed mechanism and the third Z-axis feed mechanism can employ a configuration including individual drive sources.

  In the present invention, the second Z-axis feed mechanism and the third Z-axis feed mechanism may be configured to have a common drive source. If comprised in this way, the structure of a machine tool can be simplified by the part which can reduce one drive source. Further, since the second Z-axis feed mechanism is not provided with a dedicated drive source, the load when the third Z-axis feed mechanism moves the second spindle and the second Z-axis feed mechanism can be reduced.

  In the present invention, the second spindle is movable, but the first spindle is configured to be immovable in the X-axis direction, the Y-axis direction, and the Z-axis direction, so that a material having a large weight is supplied to the first spindle. May be. In addition, since a two-stage Z-axis feed mechanism (second Z-axis feed mechanism and third Z-axis feed mechanism) is provided for the second spindle, the movement speed of the second spindle in the Z-axis direction can be increased. This is advantageous in that the time for transferring the workpiece from the first spindle to the second spindle can be shortened.

  Embodiments of the present invention will be described with reference to the drawings. In the following description, the directions orthogonal to each other are defined as the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively. Of these, the horizontal axis direction of the spindle is defined as the Z-axis direction. The direction is the X-axis direction, and the vertical direction perpendicular to the X-axis direction is the Y-axis direction.

[Embodiment 1]
(overall structure)
FIGS. 1A and 1B are a block diagram schematically showing the configuration of the machine tool according to Embodiment 1 of the present invention, and an explanatory diagram showing the configuration in the NC section, respectively.

  1A, a machine tool 100 according to the present embodiment includes a first spindle 1 whose axis extends in the Z-axis direction, a second spindle 2 facing the first spindle 1 in the Z-axis direction, A workpiece W held on one spindle 1 and a turret 3 holding a tool 30 for processing the workpiece W held on the second spindle 2 are provided.

  In this embodiment, the first spindle 1 receives a rotational driving force from a first spindle drive motor (not shown) and can rotate about the axis S1. However, the first spindle 1 cannot move in the X-axis direction, the Y-axis direction, and the Z-axis direction.

  A rotational driving force from an indexing turret S drive motor (not shown) is transmitted to the turret 3 and can rotate about the axis T1. Further, the turret 3 includes a first X-axis feed mechanism X1 that moves the turret 3 in the X-axis direction and a first Z-axis feed mechanism Z1 that moves the turret 3 in the Z-axis direction. It can move in the direction and the Z-axis direction. Each of the first X-axis feed mechanism X1 and the first Z-axis feed mechanism Z1 is a ball screw, and a screw shaft of the ball screw is supplied from a first X-axis feed motor and a first Z-axis feed motor (not shown). A rotational driving force is transmitted. In configuring the first Z-axis feed mechanism Z1, for example, an upper slider on which the turret 3 is mounted and a lower slider that supports the upper slider below are mechanically connected by a ball screw, and the upper slider and the lower slider are A guide for guiding the upper slider in the Z-axis direction is provided between the side sliders. In constructing the first X-axis feed mechanism X1, for example, the lower slider and a stage that supports the lower slider are mechanically connected by a ball screw, and the lower slider and the stage are connected to each other. A guide for guiding the lower slider in the X-axis direction is provided between them.

  A rotational driving force from a second spindle driving motor (not shown) is transmitted to the second spindle 2 and can rotate about the axis S2. The second spindle 2 includes a second Z-axis feed mechanism Z2 that moves the second spindle 2 in the Z-axis direction. Further, the second spindle 2 is provided with a second X-axis feed mechanism X2 that moves the second spindle 2 in the X-axis direction.

  In configuring the second X-axis feed mechanism X2, in this embodiment, the second spindle 2 is mounted on the upper slider 41 together with the second spindle motor. Further, the upper slider 41 and the intermediate slider 42 that supports the upper slider 41 below are mechanically connected via a ball screw for the second X-axis feed mechanism X2, and the shaft end of the ball screw has an intermediate portion. The output shaft of the second X-axis feed motor 7X2 mounted on the slider 42 is connected. A guide extending in the X-axis direction is configured between the upper slider 41 and the intermediate slider 42. For this reason, when the output shaft of the second X-axis feed motor 7X2 rotates, the upper slider 41 moves in the X-axis direction while being guided by the guide between the upper slider 41 and the intermediate slider 42.

  In configuring the second Z-axis feed mechanism Z2, in this embodiment, the intermediate slider 42 and the lower slider 43 that supports the intermediate slider below are connected via a ball screw for the second Z-axis feed mechanism Z2. The shaft end of the ball screw is connected to the output shaft of the second Z-axis feed motor 7Z2 mounted on the lower slider 43. A guide extending in the Z-axis direction is formed between the lower slider 43 and the intermediate slider 42. For this reason, when the output shaft of the second Z-axis feed motor 7Z2 rotates, the intermediate slider 42 moves in the Z-axis direction while being guided by the guide between the intermediate slider 42 and the lower slider 43.

  Furthermore, in this embodiment, a third Z-axis feed mechanism Z3 that moves the second spindle 2 in the Z-axis direction is configured for the second spindle 2. In configuring the third Z-axis feed mechanism Z3, the lower slider 43 and the bed 44 that supports the lower slider 43 below are connected via a ball screw for the third Z-axis feed mechanism Z3. The shaft end of the ball screw is connected to the output shaft of the third Z-axis feed motor 7Z3 mounted on the bed 44. Further, a guide extending in the Z-axis direction is configured between the lower slider 43 and the bed 44. Therefore, when the output shaft of the third Z-axis feed motor 7Z3 rotates, the lower slider 43 moves in the Z-axis direction while being guided by the guide between the bed 44 and the lower slider 43.

  In this embodiment, the turret 3 and the second spindle 2 are not provided with a Y-axis feed mechanism. Therefore, the second spindle 2 is at the same height position in the Y-axis direction with respect to the first spindle 1. Further, the turret 3 is at a height position where the workpiece held on the first spindle 1 and the workpiece held on the second spindle 2 can be processed. The turret 3 and the second spindle 2 may be provided with a Y-axis feed mechanism.

(Operation)
FIG. 2 is an explanatory view schematically showing the operation of the machine tool according to Embodiment 1 of the present invention. In the machine tool 100 of the present embodiment, as shown in FIG. 2A, the unprocessed workpiece W (material) supplied to the first spindle 1 is processed with a tool 30 held by the turret 3. At that time, the first spindle 1 rotates around the axis S1, and the turret 3 is driven in the Z-axis direction by the first Z-axis feed mechanism Z1 while the position in the X-axis direction is controlled by the first X-axis feed mechanism X1. The

  Further, in the machine tool 100, after the processing for the workpiece W is completed on the first spindle 1 side, the side on which the second spindle 2 approaches the first spindle 1 in the Z-axis direction as shown in FIG. 2B. The workpiece W is received from the first spindle 1. At this time, the position of the second spindle 2 in the Z-axis direction is controlled by the second Z-axis feed mechanism Z2 and the third Z-axis feed mechanism Z3. Further, the position of the second spindle 2 in the X-axis direction is controlled by the second X-axis feed mechanism X2.

  Here, when the unprocessed workpiece W is supplied to the first spindle 1 with a long bar from behind the first spindle 1, the workpiece W is cut by the tool 30 held by the turret 3. It is. During such cutting, the first spindle 1 rotates about the axis, and the turret 3 is controlled in the Z-axis direction by the first Z-axis feed mechanism Z1 while the position in the X-axis direction is controlled by the first X-axis feed mechanism X1. Driven. On the other hand, when the raw workpiece W is supplied to the first spindle 1 in the state of the raw workpiece W cut to a predetermined size, the workpiece W is cut by the tool 30 held by the turret 3. Is not done.

  As shown in FIG. 2C, when machining the workpiece W on the second spindle 2 side, the turret 3 is moved in the X-axis direction and Z direction by the first X-axis feed mechanism X1 and the first Z-axis feed mechanism Z1. The axial position is controlled. In this state, while the second spindle 2 rotates about the axis, the second spindle 2 is controlled by the second X-axis feed mechanism X2 while the position in the X-axis direction is controlled, and the second Z-axis feed mechanism Z2 and / or the third ZZ is controlled. Driven in the Z-axis direction by the shaft feed mechanism Z3.

  After the processing on the workpiece W on the second spindle 2 side is completed, the workpiece W is discharged by the unloader device.

(Configuration of NC device)
The machine tool 100 of this embodiment includes an NC device 200 shown in FIG. The NC device 200 includes a program storage unit 210 that stores a program, an arithmetic processing unit 220 that performs various arithmetic operations, and a servo motor driving unit 230.

  The arithmetic processing unit 220 reads a program as needed from the NC program storage unit 210, calculates an appropriate movement position and feed speed according to the read program and the state of each axis, and instructs the servo motor driving unit 230. The servo motor driving unit 230 transmits the information to the servo motors of the respective axes, and the machine tool 100 operates according to the program. The servo motor driving unit 230 also drives the first spindle driving motor, the second spindle driving motor, and the turret driving motor.

  In the NC apparatus 200 of this embodiment, each moving axis for cutting the workpiece W held on the first spindle 1 is defined as a first system as follows.

1st system 1st X-axis feed mechanism X1
First Z-axis feed mechanism Z1
Rotation of turret 3 around axis T1 Rotation of first spindle 1 around axis S1

  Each moving axis for cutting the workpiece W held on the second spindle 2 is defined as a second system as follows.

Second system Second X-axis feed mechanism X2
Second Z-axis feed mechanism Z2
3rd Z-axis feed mechanism Z3
Rotation of the second spindle 2 around the axis S2

(Specific example 1 of command for arbitrary axis replacement)
When the operation described with reference to FIG. 2A is performed by controlling the first X-axis feed mechanism X1 and the first Z-axis feed mechanism Z1, the G code (for example, G140)
G140 X = X1 Z = Z1
Is commanded.

(Specific example 2 of command for arbitrary axis replacement)
When the operation described with reference to FIG. 2B is performed by controlling the second X-axis feed mechanism X2, the second Z-axis feed mechanism Z2, and the third Z-axis feed mechanism Z3, the G code (for example, G140)
G140 X = X2 Z = Z2 + Z3
Is commanded. Therefore, after arbitrary axis replacement, for example,
G00 Z100
The first spindle 1 moves to a position where Z2 + Z3 = 100. At that time, the movement amount of the second spindle 2 in the Z-axis direction by the second Z-axis feed mechanism Z2 and the movement amount by the third Z-axis feed mechanism Z3 are automatically calculated in consideration of the maximum stroke, This is performed based on the calculation result.

  Therefore, when the workpiece W is transferred from the first spindle 1 to the second spindle 2, even if the stroke is long, the second spindle 2 can be moved in the Z-axis direction in a short time.

(Specific example 3 of command for arbitrary axis replacement)
When the operation described with reference to FIGS. 2B and 2C is performed by controlling the second X-axis feed mechanism X2, the second Z-axis feed mechanism Z2, and the third Z-axis feed mechanism Z3, the G code ( For example, in G140)
G140 X = X2 Z = Z2 + Z3, Z3 = 100
And then
G00 Z = 100
Command. When such setting is performed, first, the second spindle 2 is driven by driving only the lower third Z-axis feed mechanism Z3 of the two-stage Z-axis feed mechanisms (second Z-axis feed mechanism Z2 and third Z-axis feed mechanism Z3). Moves to the position of Z-axis coordinate = 100. At this time, the second spindle 2 is not driven by the second Z-axis feed mechanism Z2. next,
G00 Z = 110
The second spindle 2 is not driven by driving the lower third Z-axis feed mechanism Z3, and the second spindle 2 is set to Z-axis coordinate = 10 by driving only the upper second Z-axis feed mechanism Z2. The second spindle 2 moves to the position of Z-axis coordinates = 110 by moving by the corresponding difference.

  In such an operation, when driven by the third Z-axis feed mechanism Z3, the second spindle 2, the second spindle drive motor, the upper slider 41, the ball screw for the second X-axis feed mechanism, and the second X-axis feed motor. Since 7X2, the intermediate slider 42, the ball screw for the second Z-axis feed mechanism Z2, the second Z-axis feed motor 7Z2, and the lower slider 43 are driven, the mass to be driven is large and the inertia is large. However, in this embodiment, in the second stage, the driving by only the upper second Z-axis feed mechanism Z2 is used, and at the time of such driving, the second spindle 2, the second spindle drive motor, the upper slider 41, the second X-axis feed. Only the ball screw for the mechanism X2, the second X-axis feed motor 7X2, and the intermediate slider 42 need be driven. The ball screw for the second Z-axis feed mechanism Z2, the second Z-axis feed motor 7Z2, and the lower slider 43 There is no need to drive. For this reason, when driven by the second Z-axis feed mechanism Z2 in the second stage, the mass of the driven object is small, so the inertia is small. Therefore, it is possible to make the second spindle 2 perform an agile operation.

(Specific example of superposition command)
In the machine tool 100 of this embodiment, when the third Z-axis feed mechanism Z3 is commanded to be superimposed on the first Z-axis feed mechanism Z1, the second Z-axis feed mechanism Z2 is commanded with a programmed value. For example, when machining the workpiece W held on the second spindle 2 with the tool 30 of the turret 3 while machining the workpiece W held on the first spindle 1 with the tool 30 of the turret 3, the workpiece W is held on the first spindle 1. The second spindle 2 is moved in the Z-axis direction by the first Z-axis feed mechanism Z1 in accordance with the movement in the Z-axis direction of the turret 3 for machining the workpiece W, and the second spindle by the second Z-axis feed mechanism Z2 2, the workpiece W held on the second spindle 2 and the tool 30 of the turret 3 are moved relative to each other.

  When performing such processing, conventionally, the feed rate has been reduced to about ½, but according to this embodiment, the second Z-axis feed mechanism Z2 and the third Z-axis feed mechanism Z3 can be used. Machining can be performed at a high feed rate.

(Main effects of this form)
As described above, in the machine tool 100 according to the present embodiment, the second spindle 2 is movable, but the first spindle 1 is configured to be immovable in the X axis direction, the Y axis direction, and the Z axis direction. Therefore, a material having a large weight may be supplied to the first spindle 1. Since the second spindle 2 is provided with a two-stage Z-axis feed mechanism (second Z-axis feed mechanism Z2 and third Z-axis feed mechanism Z3), the work from the first spindle 1 to the second spindle 2 is performed. The delivery time of W can be shortened and the moving speed of the second spindle 2 in the Z-axis direction can be improved.

  Further, since the second X-axis feed mechanism X2 for driving the second spindle 2 in the X-axis direction is provided, the workpiece W held on the second spindle 2 can be processed only by the system on the second spindle 2 side. There are advantages such as being able to. Therefore, in each of the first spindle 1 side and the second spindle 2 side, grooving, drilling, and turning can be performed independently and simultaneously on the workpiece W.

[Embodiment 2]
FIG. 3 is a block diagram schematically showing the configuration of the machine tool 100 according to the second embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 3, the machine tool 100 of the present embodiment is also opposed to the first spindle 1 whose axis extends in the Z-axis direction and the first spindle 1 in the Z-axis direction, as in the first embodiment. It has the 2nd spindle 2, and the turret 3 holding the tool 30 for processing the workpiece | work W hold | maintained at the 1st spindle 1, and the workpiece | work W hold | maintained at the 2nd spindle 2. FIG. The first spindle 1 can rotate around the axis S1, but the first spindle 1 cannot move in the X-axis direction, the Y-axis direction, and the Z-axis direction. The turret 3 is rotatable about the axis T1, and the turret 3 includes a first X-axis feed mechanism X1 that moves the turret 3 in the X-axis direction and a first Z-axis feed mechanism Z1 that moves the turret 3 in the Z-axis direction. And are configured.

  The second spindle 2 can rotate about the axis S2, and the second spindle 2 is configured with a second Z-axis feed mechanism Z2 that moves the second spindle 2 in the Z-axis direction.

  However, in this embodiment, unlike the first embodiment, the second spindle 2 is not provided with the second X-axis feed mechanism X2 that moves the second spindle 2 in the X-axis direction. For this reason, the second spindle 2 is located at the same position with respect to the first spindle 1 in the X-axis direction and the Y-axis direction. In this embodiment, the intermediate slider 42 described in the first embodiment is omitted, and the second Z-axis feed mechanism Z2 drives the upper slider 41 in the Z-axis direction.

  In such a configuration, the turret 3 includes the first X-axis feed mechanism X1, so that the workpiece W held on the second spindle 2 can be processed with the tool 30 of the turret 3.

  Further, since the second spindle 2 is not provided with the second X-axis feed mechanism X2 for moving the second spindle 2 in the X-axis direction, the intermediate slider 42 and the second X-axis feed motor described in the first embodiment are used. 7X2 can be omitted, and there is an advantage that the load when the second Z-axis feed mechanism Z2 and the third Z-axis feed mechanism Z3 drive the second spindle 2 in the Z-axis direction can be reduced.

[Embodiment 3]
FIG. 4 is a block diagram schematically showing the configuration of the machine tool 100 according to the third embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 4, the machine tool 100 according to the present embodiment is also opposed to the first spindle 1 whose axis extends in the Z-axis direction and the first spindle 1 in the Z-axis direction, as in the first embodiment. It has the 2nd spindle 2, and the turret 3 holding the tool 30 for processing the workpiece | work W hold | maintained at the 1st spindle 1, and the workpiece | work W hold | maintained at the 2nd spindle 2. FIG. The first spindle 1 can rotate about the axis S1, but cannot move in the X-axis direction, the Y-axis direction, and the Z-axis direction. The turret 3 is rotatable about the axis T1, and the turret 3 includes a first X-axis feed mechanism X1 that moves the turret 3 in the X-axis direction and a first Z-axis feed mechanism Z1 that moves the turret 3 in the Z-axis direction. And are configured. The second spindle 2 can rotate around the axis S2, and the second spindle 2 includes a second Z-axis feed mechanism Z2 for moving the second spindle 2 in the Z-axis direction, and the second spindle 2 in the X-axis direction. A second X-axis feed mechanism X2 to be moved is configured. Further, the second spindle 2 is also provided with a third Z-axis feed mechanism Z3 that moves the second spindle 2 in the Z-axis direction.

  In configuring the two-stage Z-axis feed mechanism (second Z-axis feed mechanism Z2 and third Z-axis feed mechanism Z3), in Embodiment 1, the second Z-axis feed mechanism Z2 and the third Z-axis feed mechanism Z3 are respectively Although the individual motors 7Z2 and 7Z3 are provided, in this embodiment, a common motor 7Z is mounted on the bed for the second Z-axis feed mechanism Z2 and the third Z-axis feed mechanism Z3. Therefore, in this embodiment, a gear transmission mechanism 9 is configured for the common motor 7Z, and the rotational driving force of the motor 7Z is transmitted via the gear transmission mechanism 9 to the second Z-axis feed mechanism Z2 and the third Z-axis feed. It is transmitted to each screw shaft of the mechanism Z3.

  When such a configuration is adopted, even when a two-stage Z-axis feed mechanism (second Z-axis feed mechanism Z2 and third Z-axis feed mechanism Z3) is configured, only one motor 7Z is required, so the configuration of the machine tool 100 is simplified. Can be achieved. Further, since the common motor 7Z is arranged on the bed 44, there is an advantage that the common motor 7Z does not act as a load when the third Z-axis feed mechanism Z3 drives the second spindle 2.

(A), (b) is respectively the block diagram which shows typically the structure of the machine tool which concerns on Embodiment 1 of this invention, and explanatory drawing which shows a structure in the NC part. It is explanatory drawing which shows typically operation | movement of the machine tool which concerns on Embodiment 1 of this invention. It is a block diagram which shows typically the structure of the machine tool which concerns on Embodiment 2 of this invention. It is a block diagram which shows typically the structure of the machine tool which concerns on Embodiment 3 of this invention.

Explanation of symbols

1 First spindle 2 Second spindle 3 Turret 30 Tool 100 Machine tool W Work X1 First X-axis feed mechanism X2 Second X-axis feed mechanism Z1 First Z-axis feed mechanism Z2 Second Z-axis feed mechanism Z3 Third Z-axis feed mechanism

Claims (4)

When the three orthogonal directions are the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively, a first spindle whose axis extends in the Z-axis direction and a first spindle that faces the first spindle in the Z-axis direction In a machine tool having two spindles, and a turret that holds a tool for processing the workpiece held on the first spindle and the workpiece held on the second spindle,
A first X-axis feed mechanism that moves the turret in the X-axis direction; a first Z-axis feed mechanism that moves the turret in the Z-axis direction; a second Z-axis feed mechanism that moves the second spindle in the Z-axis direction; A third Z-axis feed mechanism that moves the second spindle together with the second Z-axis feed mechanism in the Z-axis direction,
The machine tool according to claim 1, wherein the first spindle is immovable in the X-axis direction, the Y-axis direction, and the Z-axis direction.   The machine tool according to claim 1, further comprising a second X-axis feed mechanism that drives the second spindle in the X-axis direction.   The machine tool according to claim 1 or 2, wherein each of the second Z-axis feed mechanism and the third Z-axis feed mechanism includes an individual drive source.   The machine tool according to claim 1, wherein the second Z-axis feed mechanism and the third Z-axis feed mechanism include a common drive source.

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