JP5383258B2 - Machine tool posture control device - Google Patents

Description

  The present invention relates to a workpiece posture control device for a machine tool that controls the attachment posture of a workpiece in a machine tool that performs workpiece machining.

  In recent years, with the increasing demand for machining accuracy, it is important to measure the dimensions of workpieces (workpieces) in addition to measuring the dimensions of tools with high precision. It has become to. Especially in the field of micro / precision machining, because the workpiece itself is small or the machining part is small, the required accuracy cannot be obtained unless the workpiece is placed in an accurate posture with respect to the machine. There was a possibility that problems could not be done. It is also important to measure the workpiece before machining and to correct the posture of the workpiece based on the measurement, for example, it is necessary to perform machining at an accurate relative position with respect to the machining performed in the previous process.

  Here, as a method of measuring the workpiece, conventionally, the indicator is manually attached to the machine, the stylus of the indicator is manually applied to the surface of the workpiece, or the measurement is performed automatically or semi-automatically using a touch probe. It is generally done. However, in the recent field of fine and precise machining, the indicator or touch probe stylus cannot be applied to the workpiece because the workpiece itself is small or the portion to be measured is small as described above. There was a problem that measurement with an indicator or a touch probe might not be possible.

  Furthermore, even if the posture of the workpiece can be measured using an indicator or a touch probe, it is difficult for the operator to manually correct the posture of the workpiece when the workpiece itself is small or the processing portion is small.

  In order to solve such a problem, Patent Document 1 discloses that a three-dimensional coordinate of an arbitrary three points on a surface to be measured of a workpiece is measured using a touch probe to obtain an actual workpiece mounting posture, and a tilt of a machine tool is obtained. A configuration is described in which the posture of a workpiece is automatically corrected using a rotary table. Patent Document 2 describes a workpiece shape measuring device that measures the shape of a workpiece using a non-contact type workpiece shape measuring device.

JP 2007-219591 A JP 2004-114203 A

  However, the invention described in Patent Document 1 has a problem that the posture cannot be corrected unless the workpiece can measure the posture using a touch probe. Further, even if the shape of the workpiece can be measured using the non-contact type workpiece shape measuring device described in Patent Document 2, even if it is a cylindrical workpiece as in the example described in Patent Document 1. Although the posture can be corrected, a general rectangular parallelepiped workpiece has a problem that the two control axes of the inclined rotary table cannot be corrected in the other rotation direction. .

  For rotation directions that cannot be corrected by the control axis of the tilt rotation table, it is possible to correct the rotation by rotating the coordinates of the machining position commanded on the machining program side. However, the program becomes complicated and machining accuracy is difficult to maintain. There was a problem that there was a risk of.

  Accordingly, an object of the present invention is to provide a workpiece posture control device for a machine tool capable of measuring the shape of a workpiece with high accuracy and correcting the mounting posture of the workpiece on a table with high accuracy. To do.

A work posture control device for a machine tool according to a first invention for solving the above-described problem includes a movable main shaft to which a tool or a measuring instrument can be attached, a table for fixing a work, the main shaft and the table. A machine tool posture control device for a machine tool that controls an attachment posture of the workpiece to the table in a machine tool including an NC device to be controlled, wherein the measuring device controls a relative position of the spindle with respect to the workpiece. By measuring the shape of the whole workpiece, the table can be rotated about two axes orthogonal to each other on a horizontal plane, and the plate on which the workpiece is fixed can be vertically expanded and contracted. and inclination angle adjusting member that is configured, a rotation angle adjustment member for rotatably supporting the plate body with a vertical axis, rotatable at any angle to the three axes around mutually orthogonal The supporting a workpiece, said with NC device calculates the posture of the actual of the work and a position of the workpiece overall shape as the spindle and the table obtained by the measuring device, the original work to be set in advance A correction value of the workpiece is calculated from a desired posture and an actual posture of the workpiece, and the rotation of the table around the three axes is controlled based on the correction value.

Work attitude control device for a machine tool according to a second invention for solving the aforementioned problem, in the work posture control device for a machine tool according to the first invention, the NC apparatus is the work the whole should originally An input unit for inputting a shape and orientation, a measurement command unit for starting measurement of the workpiece, each axis movement command unit for controlling movement of the spindle and the table, and positions of the spindle and the table at the time of workpiece measurement The position of the workpiece to be attached to the table on the basis of the position of the spindle and the table determined by the axis position calculator, the shape of the whole workpiece determined by the measuring instrument, and the axis position calculator The workpiece attachment posture calculation unit for obtaining the actual attachment posture of the workpiece obtained by the workpiece attachment posture calculation unit and the input unit A posture correction value calculation unit that calculates a correction value of the posture of the workpiece from the posture that should be originally input in the workpiece, and each of the axis movement command units is based on the correction value. It is configured to control the rotation of the three axes and to correct the posture of the workpiece.

A work posture control apparatus for a machine tool according to a third aspect of the present invention for solving the above-described problem is the work posture control apparatus for a machine tool according to the first aspect of the present invention, wherein the measuring device measures light with respect to the work. the entire workpiece by obtaining a light projecting unit for irradiating, the length of the a light receiving portion for receiving the measurement light reflected light reflected by the workpiece until the workpiece based on the reflection angle of the reflected light It is the non-contact-type measuring means comprised so that the shape of this may be measured.

In the fourth machine tool of the work posture control apparatus according to the invention of a work posture control apparatus of a machine tool according to any one of the first to third aspect of the invention to solve the above problems, before Symbol inclination angle adjusting member However, it is characterized in that they are arranged at intervals in at least three places on the lower surface of the plate body.

  According to the work posture control device for a machine tool according to the first aspect described above, a movable main shaft on which a tool or a measuring instrument can be mounted, a table for fixing the work, and an NC device for controlling the main shaft and the table. A machine tool posture control device for controlling the mounting posture of a workpiece on a table in a machine tool provided with a measuring instrument for measuring the shape of the workpiece, and the table at an arbitrary angle around three axes orthogonal to each other The workpiece is supported in a rotatable manner, and the actual posture of the workpiece is calculated from the shape of the workpiece obtained by the NC device using the measuring instrument and the position of the spindle and the table. The workpiece correction value is calculated from the actual posture of the workpiece, and the rotation of the table around the three axes is controlled based on this correction value. Only the posture can be corrected with high precision automatically becomes thereby possible to improve the machining accuracy.

  Further, according to the work posture control apparatus for a machine tool according to the second invention, the NC device has an input unit for inputting the shape and posture of the work to be originally provided, a measurement command unit for starting measurement of the work, a spindle And each axis movement command unit for controlling the movement of the table, each axis position calculation unit for determining the position of the spindle and the table at the time of workpiece measurement, the shape of the workpiece obtained by the measuring instrument and the spindle obtained by each axis position calculation unit And a workpiece mounting posture calculation unit for determining the mounting posture of the workpiece on the table based on the table position, an actual workpiece mounting posture calculated by the workpiece mounting posture calculation unit, and the workpiece input in the input unit. A posture correction value calculation unit that calculates a correction value of the posture of the workpiece from the posture that should be originally provided, and each axis movement command unit has a table based on the correction value Controls three axes of rotation about, because that is configured to correct the attitude of the workpiece, it is possible to perform the highly accurate correction of the work posture automatically.

  According to the work posture control apparatus for a machine tool according to the third aspect of the invention, the measuring device receives the light projecting unit that irradiates the work with the measurement light and the reflected light of the measurement light reflected by the work. A non-contact measuring means configured to measure the shape of the workpiece by determining the distance to the workpiece based on the reflection angle of the reflected light, so that the workpiece itself is small or the processing portion Even if it is a small case, the shape of the workpiece can be measured with high accuracy.

  Further, according to the work posture control apparatus for a machine tool according to the fourth invention, the table is rotatable about two axes orthogonal to each other on the horizontal plane, and the plate body on which the work is fixed A tilt angle adjusting body configured to be extendable in the vertical direction and a rotation angle adjusting body that supports the plate body so as to be rotatable about the vertical axis, and the tilt angle adjusting body includes at least three positions on the lower surface of the plate body. Therefore, the table can be rotated around three axes orthogonal to each other, and the posture of the workpiece can be automatically corrected with high accuracy.

It is a schematic block diagram of the workpiece | work attitude | position control apparatus of the machine tool which concerns on the Example of this invention. It is a side view which shows an example of the non-contact sensor applied to the workpiece posture control apparatus of the machine tool which concerns on the Example of this invention. It is a disassembled perspective view which shows an example of the inclination rotation table applied to the workpiece attitude control apparatus of the machine tool which concerns on the Example of this invention. It is a block diagram which shows the structure of the workpiece posture control apparatus of the machine tool which concerns on the Example of this invention.

  Hereinafter, a workpiece posture control apparatus for a machine tool according to the present invention will be described in detail with reference to the drawings.

An example of a workpiece posture control device for a machine tool according to the present invention will be described with reference to FIGS.
As shown in FIG. 1, in the present embodiment, the machine tool body 10 supports a spindle 15 on a bed 11 constituting a base of the machine tool body 10 via a column 12, a saddle 13, and a spindle head 14. The slide table 16 is supported on the upper surface and in front of the column 12.

  The column 12 is placed on the bed 11 and supports a saddle 13 movably in a horizontal direction (hereinafter referred to as X-axis direction) along a guide surface provided on the front surface thereof. The saddle 13 also has a guide surface on the front surface thereof, and supports the spindle head 14 so as to be movable in the vertical direction (hereinafter, Z-axis direction) along the guide surface. The spindle head 14 supports the spindle 15 so as to be rotatable about an axis parallel to the Z axis.

  The slide table 16 is supported so as to be movable in the front-rear direction (hereinafter referred to as the Y-axis direction) along a guide surface provided on the upper surface of the bed 11. With this configuration, the relative position of the main shaft 15 with respect to the table 16 can be changed in the X-axis, Y-axis, and Z-axis directions.

  When machining the workpiece W, a tool (not shown) is detachably attached to the spindle 15 by, for example, an automatic tool change function of a machine tool. Further, when measuring the shape and mounting posture of the workpiece W, a non-contact sensor 20 as a non-contact type measuring device is detachably mounted on the spindle 15.

  On the other hand, the work W is fixed to the slide table 16 via the inclined rotation table 30. That is, in the present embodiment, the table is constituted by the slide table 16 and the inclined rotation table 30.

  The non-contact sensor 20 measures the shape of the workpiece W. For example, as shown in FIG. 2, a spindle gripping portion 22 is provided on the base end side of the main body 21, while a light projecting portion 23 and a tip end side are provided. A light receiving unit 24 is provided. The spindle gripping portion 22 is formed in the same shape as the tool holder of the above-described tool so that the non-contact sensor 20 can be mounted on the spindle 15 by the automatic tool change function of the machine tool. The light projecting unit 23 emits measurement light (for example, laser light or light using halogen / LED as a light source) to the workpiece W, and the light receiving unit 24 measures measurement light reflected by the workpiece W (hereinafter referred to as “light”). This is a portion that receives reflected light). In the non-contact sensor 20 configured as described above, for example, the distance to the surface of the workpiece W can be obtained from the reflection angle of the reflected light incident on the light receiving unit 24.

  The inclined rotary table 30 is installed on the upper surface of the slide table 16 and is configured to move integrally with the slide table 16 in the Y-axis direction. In this embodiment, the inclined rotary table 30 is configured so that the workpiece W fixed on the upper surface thereof is rotated around an axis parallel to the X axis (hereinafter referred to as a direction around the A axis) and rotated around an axis parallel to the Y axis. (Hereinafter, the direction around the B axis), and a rotation direction around the axis parallel to the Z axis (hereinafter, the direction around the C axis).

  Specifically, as shown in FIG. 3, the tilt rotation table 30 includes a tilt angle adjustment unit 31 configured to be capable of rotating the workpiece W in the directions around the A axis and the B axis, and the workpiece W around the C axis. It is comprised from the index part 32 comprised so that rotation to a direction was possible.

  The inclination angle adjusting unit 31 is configured such that a plate body 31b is supported on the upper surface of a main body 31a via three inclination angle adjusting bodies 31c, 31d, 31e. The inclination angle adjusting bodies 31c, 31d, 31e can each adjust the length in the Z-axis direction, and the plate body 31b can be adjusted around the A axis by adjusting the lengths of these inclination angle adjusting bodies 31c, 31d, 31e. It can be rotated in the direction and the direction around the B axis. Note that the inclination angle adjusting bodies 31c, 31d, and 31e are disposed with a space therebetween.

  Here, as such inclination angle adjusting bodies 31c, 31d, and 31e, for example, piezoelectric elements that expand and contract by supplying current can be used. When a piezo element is used, the amount of current supplied to the tilt angle adjusting bodies 31c, 31d, 31e made of the piezo element is adjusted as necessary, and the lengths of the tilt angle adjusting bodies 31c, 31d, 31e are respectively adjusted. Accordingly, the plate body 31b in contact with the tilt angle adjusting bodies 31c, 31d, 31e can be tilted to a desired angle.

  On the other hand, the indexing part 32 has a rotating body 32b as a rotation angle adjusting body supported rotatably on the main body 32a in the direction around the C axis, and the rotation angle of the rotating body 32b is set at an arbitrary angle. It can be adjusted. The inclination angle adjusting unit 31 described above is fixed to the rotating body 32b, and thereby the rotation angle of the workpiece W in the direction around the C axis can be adjusted to a desired angle.

  With the tilt rotation table 30 configured in this way, in this embodiment, the workpiece W fixed to the plate body 31a can be rotated in the direction around the A axis, the direction around the B axis, and the direction around the C axis. As a result, the mounting posture of the workpiece W can be corrected to a desired posture with high accuracy.

  Further, as shown in FIG. 4, in the present embodiment, the operation of the machine tool main body 10, the non-contact sensor 20 and the tilt rotation table 30 is controlled by the NC device 40. Here, the saddle 13, the spindle head 14, the slide table 16, and the tilt angle adjusting unit 31 and the indexing unit 32 of the tilt rotating table 30 are respectively provided with position detection devices (for example, scales) not shown. ) Is installed, and a feedback signal from the position detection device is input to the NC device 40 described later.

  The NC device 40 is a device that controls the entire machine tool, and includes an input unit 41, a measurement command unit 42, each axis movement command unit 43, each axis position calculation unit 44, a workpiece attachment posture calculation unit 45, and a posture correction value calculation. A portion 46 is provided.

  The input unit 41 is a part that inputs various data necessary for the operation of the NC device 40, including the original shape of the workpiece W (the shape on the drawing) and the original mounting posture with respect to the inclined rotary table 30.

  The measurement command unit 42 starts the measurement operation of the shape and attachment posture of the workpiece W by the NC device 40 by a preset program based on various data input from the operator in the input unit 41, and a sensor described later A start command is output to the control device 50.

  When each axis movement command unit 43 performs machining on the workpiece W, the saddle 13 of the machine tool body 10 according to a program set in advance based on various data input from the operator in the input unit 41, A drive command is output to each motor that is a drive source of the spindle head 14 and the slide table 16, and the relative positions of the spindle 15 with respect to the workpiece W in the X-axis, Y-axis, and Z-axis directions are controlled.

  Further, during the measurement operation for measuring the shape and mounting posture of the workpiece W, the saddle 13, the spindle head 14, and the slide table 16 are set by a preset program based on various data input by the operator in the input unit 41. Relative in the X-axis, Y-axis, and Z-axis directions of the spindle 15 with respect to the workpiece W so that a drive command is output to each motor as a drive source and the shape of the entire workpiece W can be measured by the non-contact sensor 20. Control the position.

  Further, when the posture of the workpiece W is corrected, the tilt angle adjusting bodies 31c, 31d, 31e and the rotating body 32b are controlled by a program set in advance based on a correction value to be described later, and the A of the workpiece W with respect to the spindle 15 is controlled. Correct the relative positions around the axis, around the B axis, and around the C axis.

  Each axis position calculation unit 44 calculates the position of each axis based on the feedback signal input from the position detection device for each axis described above. The workpiece mounting posture calculation unit 45 is a tilt rotation table of the actual workpiece W based on the position information of each axis during the measurement operation acquired by each axis position calculation unit 44 and the measurement distance information obtained by the measurement by the non-contact sensor 20. The calculation which calculates | requires the attachment attitude | position to 30 is performed. The measurement distance information here is a distance from the non-contact sensor 20 to the workpiece W, and is converted into a distance in the sensor control device 50 based on information of reflected light received by the light receiving unit 24 of the non-contact sensor 20. And input to the NC device 40.

  The posture correction value calculation unit 46 compares the original posture of the workpiece W input in the input unit 41 with the actual posture of the workpiece W obtained by the workpiece attachment posture calculation unit 45, calculates the error, and calculates the error. A correction value for correcting the posture of the workpiece W to an original posture is obtained by calculation.

  The sensor control device 50 includes a sensor activation unit 51 and a measurement distance calculation unit 52. The sensor activation unit 51 activates the non-contact sensor 20 in response to the activation command from the measurement command unit 42. As a result, the measurement light is emitted from the light projecting unit 23, the reflected light is incident on the light receiving unit 24, and the measurement result is input to the sensor control device 50. The measurement distance calculation unit 52 calculates the measurement distance (the distance from the non-contact sensor 20 to the workpiece W) by calculation based on the information on the reflection angle of the reflected light input from the non-contact sensor 20. This calculation result is output to the NC device 40.

  Below, the flow of processing by the NC device 40 when the workpiece W is measured by the workpiece posture control device of the machine tool according to the present embodiment configured as described above will be briefly described. In the NC device 40, first, various data are input by the input unit 41. Subsequently, the measurement command unit 42 outputs to each part of the measurement operation of the shape of the workpiece W and the mounting posture to the inclined rotation table 30 based on the data input in the input unit 41, while the sensor control device 50 Outputs start command.

  When the measurement command unit 42 outputs the start of the measurement operation by the NC device 40, the machine tool main body moves the non-contact sensor 20 mounted on the spindle 15 to the upper part of the workpiece W in each axis movement command unit 43. While the saddle 13, the spindle head 14, and the slide table 16 are controlled, the non-contact sensor 20 is activated via the sensor activation unit 51 of the sensor control device 50.

  Further, each axis movement command unit 43 controls the relative position between the workpiece W and the non-contact sensor 20 so that the shape of the entire workpiece W can be measured by the non-contact sensor 20. At this time, the position of each axis is calculated in each axis position calculation unit 44.

  Then, in the workpiece attachment posture calculation unit 45, the actual distance of the workpiece W is calculated from the measurement distance information input from the measurement distance calculation unit 52 of the sensor control device 50 and the position of each axis obtained by each axis position calculation unit 44. An attachment posture to the inclined rotary table 30 is obtained.

  Subsequently, the posture correction value calculation unit 46 calculates an error between the original posture of the workpiece W and the actual mounting posture of the workpiece W obtained by the workpiece mounting posture calculation unit 45, and the workpiece W is calculated based on the calculated error. The correction value of the posture is obtained. Subsequently, each axis movement command unit 43 controls the tilt angle adjusting unit 31 and the indexing unit 32 of the tilt rotation table 30 based on this correction value, and corrects the posture of the workpiece W to a proper posture.

  By performing such processing, in this embodiment, based on the measurement result of the shape of the workpiece W by the non-contact sensor 20, the posture of the workpiece W can be automatically corrected with high accuracy to the original posture.

  According to the workpiece posture control device of the machine tool according to the present embodiment configured as described above, the tilt rotation table 30 is configured to be rotatable in the direction around the A axis, the direction around the B axis, and the direction around the C axis, Since the posture of the workpiece W can be automatically corrected, the posture control and the posture correction of the workpiece W can be automatically performed. As a result, the labor of the operator can be reduced and the machining of the workpiece W can be performed with high accuracy.

  In addition, although the example which uses the non-contact sensor 20 mentioned above as a measuring device was shown in a present Example, it is not limited to what was mentioned above as a measuring device, Depending on the shape of the workpiece | work W, contact-type measurement, such as a touch probe, is carried out. Means may be used.

  Further, the non-contact sensor 20 shows an example in which the measurement light emitted from the light projecting unit 23 receives the reflected light reflected by the workpiece W by the light receiving unit 24 and measures the distance from the workpiece W from the angle of the reflected light. However, the non-contact sensor is not limited to the above-described sensor, and for example, a measuring unit such as an autocollimating method may be used.

  Moreover, although the example which mounts the non-contact sensor 20 to the main spindle 15 of a machine tool using the main spindle holding part 22 was shown, the attachment method of the non-contact sensor 20 is not limited to what was mentioned above, For example, it fixes to the main spindle head 14 You may use means, such as doing.

  Moreover, although the example using the inclination rotation table 30 which consists of the inclination angle adjustment part 31 and the index part 32 mentioned above as an inclination rotation means was shown, as an inclination rotation means, it is not limited to what was mentioned above, The slide table 16 is used. Instead, a rotation table capable of adjusting the rotation angle around the C axis constituting the machine tool main body 10 is used, and the inclination angle adjustment unit 31 is fixed on the rotation table. For example, various changes can be made without departing from the spirit of the present invention. Can be changed.

  Moreover, although the example which uses a piezo element as the inclination angle adjustment bodies 31c, 31d, and 31e was shown, as the inclination angle adjustment bodies 31c, 31d, and 31e, it is not limited to a piezo element, For example, board | plates using air are used. The inclination angle of the plate 31b may be adjusted using a member that can be expanded and contracted in the vertical direction, such as adjusting the inclination angle of the body 31b.

  Further, a tool (not shown) can be mounted on the tip of the spindle 15 instead of the non-contact sensor 20 by the automatic tool change function of the machine tool, and the workpiece is mounted and fixed on the inclined rotary table 30. It goes without saying that machining of the workpiece W can be performed by moving the tool relative to W in the X-axis, Y-axis, and Z-axis directions.

  The present invention can be applied to a work posture control device for a machine tool that controls the mounting posture of the work in a machine tool that performs machining of the work.

DESCRIPTION OF SYMBOLS 10 Machine tool main body 11 Bed 12 Column 13 Saddle 14 Spindle head 15 Spindle 16 Slide table 20 Non-contact sensor 21 Non-contact sensor main body 22 Spindle holding part 23 Light projection part 24 Light-receiving part 30 Tilt rotation table 31 Tilt angle adjustment part 31a Tilt angle Adjustment unit main body 31b Plate body 31c, 31d, 31e Inclination angle adjustment body 32 Indexing unit 32a Indexing unit main body 32b Rotating body 40 NC device 41 Input unit 42 Measurement command unit 43 Each axis movement command unit 44 Each axis position calculation unit 45 Workpiece installation posture calculation unit 46 Posture correction value calculation unit 50 Sensor control device 51 Sensor activation unit 52 Measurement distance calculation unit W Workpiece

Claims (4)

A machine for controlling the mounting posture of the workpiece on the table in a machine tool comprising a movable spindle capable of mounting a tool or a measuring instrument, a table for fixing the workpiece, and an NC device for controlling the spindle and the table. A machine work posture control device,
The measuring device measures the shape of the entire workpiece by controlling the relative position of the spindle relative to the workpiece,
The table is rotatable about two axes orthogonal to each other on a horizontal plane, the plate on which the work is fixed on the upper surface thereof, the tilt angle adjusting body configured to be extendable in the vertical direction, A rotation angle adjusting body that supports the plate body so as to be rotatable about a vertical axis, and supports the workpiece so as to be rotatable at an arbitrary angle around three axes orthogonal to each other;
The NC device calculates the actual posture of the workpiece from the shape of the entire workpiece obtained by the measuring instrument and the positions of the spindle and the table, and the posture that should be originally set for the workpiece and the workpiece A workpiece posture control apparatus for a machine tool, wherein a correction value of the workpiece is calculated from the actual posture and a rotation of the table about the three axes is controlled based on the correction value. The NC device is
An input unit for inputting the shape and posture of the whole workpiece that should be originally;
A measurement command unit for starting measurement of the workpiece;
Each axis movement command section for controlling movement of the spindle and the table;
Each axis position calculation unit for obtaining the position of the spindle and the table at the time of workpiece measurement;
A workpiece mounting posture calculation unit for determining a mounting posture of the workpiece on the table based on the shape of the whole workpiece determined by the measuring device and the position of the spindle and the table determined by each axis position calculation unit;
Posture correction value for calculating a correction value of the posture of the workpiece from the actual posture of the workpiece attached to the table obtained by the workpiece attachment posture calculation unit and the posture of the workpiece that should be input in the input unit With an arithmetic unit,
2. The configuration according to claim 1, wherein each of the axis movement command units is configured to control rotation of the table around the three axes based on the correction value to correct the posture of the workpiece. Work posture control device for machine tools. The measuring device includes a light projecting unit that irradiates the workpiece with measurement light, and a light receiving unit that receives the reflected light of the measurement light reflected by the workpiece, based on the reflection angle of the reflected light. The workpiece posture control device for a machine tool according to claim 1, wherein the workpiece posture control device is configured to measure a shape of the entire workpiece by obtaining a distance to the workpiece. Before SL inclination angle adjusting body, the machine tool according to any one of claims 1 to 3, characterized in that arranged at a mutual spacing in at least three places of the lower surface of the plate body Work posture control device.

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