JP2004358650A - Linear motor driven processing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a linear motor driven processing device with a high accelerating performance, which is miniaturized and lightened by reducing vertical length of a saddle, and raises a servo gain. <P>SOLUTION: A saddle is guided on a column by upper and lower X-axis guides, and moved in an X-axis direction by upper and lower X-axis linear motors, and a slide fixed to a spindle head is guided on a saddle by left and right Y-axis guides, and moved in a Y-axis direction by left and right Y-axis linear motors. Left and right Y-axis linear motor magnets are fixed in the Y-axis direction with a magnetic pole face of a front face of the saddle faced forward at a left position of the right Y-axis guide and a right position of the right Y-axis guide. Left and right Y-axis linear motor coils are fixed to the left and right Y-axis linear motor magnets opposite to each other on rear faces of a left end and a right end of the slide. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a linear motor driven machining apparatus that performs relative motion between a tool and a workpiece by a linear motor.

Conventionally, a column is erected on a bed, upper and lower X-axis guides are horizontally provided at upper and lower positions in front of the column, and a saddle is guided to the column by the upper and lower X-axis guides. It is mounted so that it can be driven in the X-axis direction by a motor, and left and right Y-axis guides are provided vertically on opposite vertical surfaces of a through space formed in the center of the saddle, and a slide on which a spindle head is mounted is mounted. Patent Document 1 discloses a machine tool in which a saddle is guided by a left and right Y-axis guides so as to be driven in a Y-axis direction by a linear motor, and a spindle on which a tool is attached and detached is rotatably supported on the spindle head. As shown, the upper and lower X-axis linear motor magnets are fixed in the X-axis direction with the magnetic pole surfaces facing the horizontal plane provided on the upper and lower sides of the column so as to face in the horizontal direction. And the lower X-axis linear motor coil are fixed to the upper and lower end surfaces of the saddle so as to face the upper and lower X-axis linear motor magnets, respectively, and the left and right Y-axis linear motor magnets are fixed to the opposing vertical surfaces of the saddle through space. The magnetic pole faces are fixed in the Y-axis direction at the rear positions of the left and right Y-axis guides, and the left and right Y-axis linear motor coils are opposed to the left and right Y-axis linear motor magnets on both sides of the slide, respectively. Fixed.
US Pat. No. 5,662,568 (columns 6, 7; FIG. 2)

  In the above-described conventional device, the left and right Y-axis linear motor magnets are opposed to the saddle through space so that the attraction of the left and right Y-axis linear motors is canceled and the attraction of the linear motor does not act on the Y-axis guide. The left and right Y-axis linear motor coils fixed to both sides of the slide so as to face the left and right Y-axis linear motor magnets, respectively, must be arranged in the through space. It is necessary to increase the length of the penetrating space and thus the length of the saddle in the Y-axis direction in order to secure the stroke in the Y-axis direction and to prevent wiring or the like that energizes the linear motor coil from contacting the upper end of the penetrating space. was there. Increasing the length of the saddle in the Y-axis direction increases the distance between the upper and lower X-axis linear motors and reduces rigidity, making it difficult to increase the servo gain and increasing the saddle mass and accelerating performance. And the machine tool becomes large.

  Furthermore, the tip of the spindle supported by the spindle head is inclined downward with respect to an ideal horizontal axis because the Y-axis guide portion is bent by the own weight of the spindle head and the saddle is displaced. In order to take such a tilt of the main shaft, a shim is inserted between the Y-axis guide and the Y-axis guide mounting surface provided on the saddle, or the Y-axis guide mounting surface is rubbed, so that the main shaft can be tilted by its own weight. An adjustment is made in advance to incline in the opposite direction with respect to the horizontal axis. For this adjustment, the slide on which the spindle head is mounted is mounted on a saddle with a Y-axis guide, the inclination angle of the spindle supported on the spindle head is measured, and the slide on which the spindle head is mounted is removed from the Y-axis guide. According to the measured inclination angle of the main shaft, a shim is inserted between the Y-axis guide and the Y-axis guide mounting surface, or the Y-axis guide mounting surface is rubbed. Such a coordinating operation required a lot of time, labor and cost.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and is a linear motor drive machining apparatus capable of shortening a saddle in a vertical direction, increasing rigidity, reducing size and weight, improving acceleration performance and increasing servo gain. It is to provide.

  In order to solve the above-mentioned problems, a structural feature of the present invention according to claim 1 is that a column that is erected on a bed, and upper and lower columns that are horizontally provided at upper and lower positions in front of the column. A lower X-axis guide, a saddle guided in the X-axis direction by the upper and lower X-axis guides, mounted on the front of the column, and formed with a through space in a central portion; and a position above the upper X-axis guide Upper and lower X-axis linear motor magnets fixed in the X-axis direction with the magnetic pole faces forward at the front of the column at a position below the lower X-axis guide, and upper and lower back surfaces of the saddle Upper and lower X-axis linear motor coils fixed to face the upper and lower X-axis linear motor magnets, respectively; and provided vertically on both sides of the through space in front of the saddle. Left and right Y-axis guides, slides guided in the Y-axis direction by the left and right Y-axis guides and mounted on the front of the saddle, and left and right positions of the left and right Y-axis guides. Left and right Y-axis linear motor magnets fixed in the Y-axis direction with their pole faces facing forward in front of the saddle at the right position, and the left and right Y-axes on the left and right rear surfaces of the slide. Left and right Y-axis linear motor coils fixed to face the linear motor magnet, respectively, and a main shaft on which a tool is mounted are rotatably supported and integrally fixed to the slide, and a rear end portion has the through space. And a table on which the workpiece is mounted so as to be drivable on the bed in the Z-axis direction perpendicular to the X-axis and Y-axis directions and to which a workpiece is mounted. It is that it was.

  A structural feature of the invention according to claim 2 is that, in claim 1, the centers of the left and right Y-axis linear motor coils in the Y-axis direction are separated above the rotation center of the main shaft.

  According to a third aspect of the present invention, in the first or second aspect, the table is provided on the upper surface of the bed in a Z-axis direction perpendicular to the X-axis and Y-axis directions. The guide is mounted in the Z-axis direction by a guide, and the left and right Z-axis linear motor magnets are vertically mounted on the upper surface of the bed at the left position of the left Z-axis guide and the right position of the right Z-axis guide. And the left and right Z-axis linear motor coils are fixed to the left and right end faces of the table so as to face the left and right Z-axis linear motor magnets, respectively. .

  According to a fourth aspect of the present invention, in the first or second aspect, the table is provided on the upper surface of the bed in a Z-axis direction perpendicular to the X-axis and Y-axis directions. The guide is mounted in the Z-axis direction by a guide, and the left and right Z-axis linear motor magnets are placed on the upper surface of the bed with the magnetic pole surface upward at the left position of the left Z-axis guide and the right position of the right Z-axis guide. , And the left and right Z-axis linear motor coils are fixed to the lower left and right lower surfaces of the table so as to face the left and right Z-axis linear motor magnets, respectively.

  A structural feature of the invention according to claim 5 is that, according to claim 1 or 2, the table is provided on the bed in the Z-axis direction perpendicular to the X-axis and Y-axis directions. The left and right Z-axis ball screws, which are guided and mounted in the Z-axis direction and are rotationally driven by a servomotor, are mounted on the upper surface of the bed at the left position of the left Z-axis guide and the right position of the right Z-axis guide. That is, a feed nut fixed on both sides of the table is screwed to the left and right Z-axis ball screws which are supported in the Z-axis direction.

  In the invention according to claim 1 configured as described above, the saddle is guided by the upper and lower X-axis guides on the column and moved in the X-axis direction by the upper and lower X-axis linear motors, and the spindle head is moved. The fixed slide is guided by the left and right Y-axis guides on the saddle and moved in the Y-axis direction by the left and right Y-axis linear motors, and the table is moved on the bed in the Z-axis direction perpendicular to the X-axis and Y-axis directions. Moved to As a result, the tool mounted on the spindle supported by the spindle head moves relatively in three orthogonal directions with respect to the workpiece mounted on the table, and performs desired processing on the workpiece.

  The left and right Y-axis linear motor magnets are fixed to the front of the saddle at the left position of the left Y-axis guide and the right position of the right Y-axis guide in the Y-axis direction with the magnetic pole surface facing forward, and the back of the left end of the slide Also, since the left and right Y-axis linear motor coils are fixed on the back of the right end opposite to the left and right Y-axis linear motor magnets, the wiring and the like that energize the linear motor coil even when the slide is raised interfere with the saddle. The vertical length of the saddle can be set according to the desired stroke of the slide, and the vertical length of the saddle can be reduced to reduce the size and weight of the saddle, thereby improving acceleration performance. The distance between the shaft linear motors can be reduced to increase rigidity and increase the servo gain. Further, the upper and lower X-axis linear motor magnets and the left and right Y-axis linear motor magnets are fixed to the front of the column and the saddle, respectively, with the magnetic pole surfaces facing forward, and the upper and lower X-axis linear motor coils and the left and right Since the right Y-axis linear motor coil is fixed to the upper and lower backs of the saddle and the left and right ends of the slide, the suction force of the upper and lower X-axis linear motors and the left and right Y-axis linear motors. As a result, a preload is applied between the upper and lower X-axis guides and the left and right Y-axis guides and the sliding body, thereby increasing the bearing rigidity, and resisting force acting on the saddle and the slide in the direction away from the column and the saddle. And the saddle and the slide are guided and moved with high rigidity and high precision. Also, the left and right Y-axis linear motor magnets are fixed to the front of the saddle with the magnetic pole faces facing forward, and the left and right Y-axis linear motor coils are mounted on the left and right Y-axis linear backs of the slide. Since the Y-axis linear motor magnet and the Y-axis linear motor coil can be easily attached to and detached from the saddle and the slide without disassembling the Y-axis guide or the like for supporting the slide, since the Y-axis linear motor coil and the Y-axis linear motor coil are fixed.

  In the invention according to claim 2 configured as described above, the centers of the left and right Y-axis linear motor coils in the Y-axis direction are separated above the rotation center of the main shaft, so that the left and right Y-axis linear motors are attracted. The resultant force acts above the center of rotation of the main shaft, and the slide is sucked so that the front end of the main shaft is directed upward with respect to the horizontal axis so as to cancel the inclination due to its own weight whose front end is directed downward. With this, the spindle head having the spindle attached to the slide so as to be perpendicular to the Y-axis guide is attached to the slide, and the slide can be mounted on the Y-axis slide so that the spindle is oriented in the ideal horizontal axis direction. And eliminating the need for complicated adjustments to incline the main shaft in advance in the direction opposite to the inclination due to its own weight with respect to the horizontal axis by inserting a shim between the Y-axis guide and the Y-axis guide mounting surface provided on the saddle. Can be.

  According to the invention according to claim 3 configured as described above, the relative movement between the tool and the workpiece in the three orthogonal directions can be performed with high speed and high accuracy by the linear motor. Furthermore, the left and right Z-axis linear motor magnets are fixed opposite to each other with the magnetic pole surfaces perpendicular to the upper surface of the bed, and the left and right Z-axis linear motor coils are mounted on the left and right end surfaces of the table. Since it is fixed to face the linear motor magnet, the suction force of the left and right Z-axis linear motors is offset, and the suction force of the linear motor acts on the Z-axis guide mechanism for guiding the table in addition to the weight of the workpiece. Can be prevented.

  According to the invention according to claim 4 configured as described above, relative movement between the tool and the workpiece in the three orthogonal directions can be performed at high speed and with high accuracy by the linear motor. Furthermore, the left and right Z-axis linear motor magnets are fixed to the upper surface of the bed with the magnetic pole faces facing upward, and the left and right Z-axis linear motor coils are fixed to the left and right lower surfaces of the table on the left and right Z-axis linear surfaces. Since the Y-axis linear motor magnet and the Y-axis linear motor coil can be easily attached to and detached from the bed and the table because they are fixed to face the motor magnet, respectively.

  In the invention according to claim 5 configured as described above, in addition to the effects of the invention according to claim 1 or 2, the X-axis and the Y-axis that require a high-speed relative movement between the tool and the workpiece. The movement in the Z-axis direction of the table on which a heavy workpiece is mounted is performed at a relatively low speed via the ball screw mechanism by the synchronous rotation of the servomotor. The relative movement mechanism in the axial direction, and hence the configuration of the entire apparatus, can be simplified and the cost can be reduced.

  Hereinafter, a first embodiment of a linear motor driven machining apparatus according to the present invention will be described with reference to the drawings. 1 and 2, a column 2 is erected on a bed 1, and upper and lower X-axis guides 3U and 3L are provided at an upper position and a lower position in a horizontal direction in front of the column 2. A plurality of slides 5 fixed to the saddle 4 are movably supported by the upper and lower X-axis guides 3U and 3L, and the saddle 4 is guided in the X-axis direction by the upper and lower X-axis guides 3U and 3L. It is mounted on the front of the column 2. On the front of the column 2, upper and lower X-axis linear motor magnets 6U and 6L are arranged above the upper X-axis guide 3U and below the lower X-axis guide 3L, respectively. Each magnet piece 7 is bolted to the column 2 by a plurality of bolts 8 inserted from the front side into a plurality of bolt holes drilled at both side ends of the rectangular magnet piece 7 constituting 6U, 6L, and the upper and lower portions are formed. Lower X-axis linear motor magnets 6U and 6L are fixed to the front of the column 2 in the X-axis direction with the magnetic pole faces facing forward. A plurality of bolts 10 are inserted from the front side into a plurality of bolt holes drilled at the upper end and the lower end of the saddle 4 and screwed to the upper and lower X-axis linear motor coils 9U, 9L, and the upper and lower sides The X-axis linear motor coils 9U and 9L are fixed to the upper and lower back surfaces of the upper and lower ends of the saddle 4 so as to face the upper and lower X-axis linear motor magnets 6U and 6L, respectively. The upper and lower X-axis linear motors 23U and 23L are respectively constituted by the upper and lower X-axis linear motor magnets 6U and 6L and the upper and lower X-axis linear motor coils 9U and 9L.

  A rectangular through space 11 is formed in the center of the saddle 4 from the vicinity of the upper and lower X-axis guides 3U and 3L, and a rear end portion of a spindle head described later extends into the through space 11 and can move up and down. It has become. On the front of the saddle 4, left and right Y-axis guides 12L and 12R are provided vertically on both sides of the through space 11. A plurality of slides 14 fixed to a slide 13 are movably supported by the left and right Y-axis guides 12L and 12R, and the slide 13 is guided in the Y-axis direction by the left and right Y-axis guides 12L and 12R. It is mounted on the front of the saddle 4. On the front of the saddle 4, left and right Y-axis linear motor magnets 15L and 15R are disposed at the left position of the left Y-axis guide 12L and right position of the right Y-axis guide 12R, respectively. , 15R, each magnet piece 16 is bolted to the saddle 4 by a plurality of bolts 17 inserted from the front side into a plurality of bolt holes drilled on both side ends of the rectangular magnet piece 16 to form left and right sides. The Y-axis linear motor magnets 15L and 15R are fixed to the front of the saddle 4 in the Y-axis direction with the magnetic pole faces facing forward. A plurality of bolts 18 are inserted from the front side into a plurality of bolt holes drilled at the left end and the right end of the slide 13 and screwed to the left and right Y-axis linear motor coils 19L and 19R, and the left and right Y-axes Linear motor coils 19L and 19R are fixed to the left and right rear surfaces of the slide 13 opposite to the left and right Y-axis linear motor magnets 15L and 15R, respectively. The left and right Y-axis linear motors 15L and 15R and the left and right Y-axis linear motor coils 19L and 19R form left and right Y-axis linear motors 24L and 24R, respectively.

  A spindle head 21 for rotatably driving a spindle 20 is fixed to the slide 13, and a rear end of the spindle head 21 extends into the rectangular through space 11. A tool is detachably attached to the tip of the main shaft 20. A balance cylinder device 22 is interposed between the slide 13 and the saddle 4, and generates a thrust balanced with the gravity of the slider 13 and the spindle head 21.

  As shown in FIGS. 3 and 4, on the bed 1, left and right Z-axis guides 25L and 25R extend in front of the column 2 in a Z-axis direction perpendicular to the X-axis and Y-axis directions. A plurality of slides 27 fixed to a table 26 are movably supported by the left and right Z-axis guides 25L and 25R, and the table 26 is guided in the Z-axis direction by the left and right Z-axis guides 25L and 25R. It is mounted on the upper surface of the bed 1. On the upper surface of the bed 1, left and right Z-axis linear motor magnets 28L and 28R are opposed to each other with their magnetic pole surfaces vertical at the left position of the left Z-axis guide 25L and the right position of the right Z-axis guide 25R. It is fixed in the direction via brackets 29L and 29R. The left and right Z-axis linear motor coils 30L, 30R are fixed to the left and right end surfaces of the table 26 so as to face the left and right Z-axis linear motor magnets 28L, 28R, respectively. The left and right Z-axis linear motors 28L and 28R and the left and right Z-axis linear motor coils 30L and 30R form left and right Z-axis linear motors 37L and 37R, respectively. On the table 26, a rotary table 31 on which a workpiece is placed and rotated is mounted so as to be rotatable about a vertical axis, and is driven to rotate by a DD motor or the like.

  Next, the operation of the linear motor driven machining apparatus according to the first embodiment will be described. The saddle 4 is guided by the upper and lower X-axis guides 3U and 3L on the column 2 and is moved in the X-axis direction by the upper and lower X-axis linear motors 23U and 23L. The slide 13 to which the spindle head 21 is fixed is guided by the left and right Y-axis guides 12L and 12R on the saddle 4 and is moved in the Y-axis direction by the left and right Y-axis linear motors 24L and 24R. Even if the slide 13 rises, the wiring and the like that energize the left and right Y-axis linear motor coils 19L and 19R do not interfere with the saddle 4, so that the vertical length of the saddle 4 is adjusted to the desired stroke of the slide 13. Can be set shorter. The saddle 4 is made smaller and lighter by shortening the length in the vertical direction to improve acceleration performance, and the distance between the upper and lower X-axis linear motors 23U and 23L is shortened to increase rigidity and increase servo gain. The left and right Y-axis linear motor magnets 15L and 15R are fixed to the front of the saddle 4 with their magnetic pole faces facing forward, and the left and right Y-axis linear motor coils 19L and 19R are connected to the left and rear surfaces of the slide 13 and the right end. Since the left and right Y-axis linear motor magnets 15L, 15R are fixed to the rear surface, respectively, the left and right Y-axis linear motor magnets 15L, 15R are not disassembled. The 15R and the left and right Y-axis linear motor coils 19L, 19R can be easily attached to and detached from the saddle 4 and the slide 13. The table 26 on which the workpiece is mounted is guided on the bed 1 by left and right Z-axis guides 25L and 25R, and is driven by left and right Z-axis linear motors 37L and 37R in the Z-axis direction perpendicular to the X-axis and Y-axis directions. Be moved. As a result, the tool mounted on the spindle 20 supported by the spindle head 21 is relatively moved in three orthogonal directions with respect to the workpiece mounted on the table 26 to perform desired processing on the workpiece. At this time, the upper and lower X-axis guides 3U, 3L and the left and right Y-axis guides 12L, 12R are pulled by the suction force of the upper and lower X-axis linear motors 23U, 23L and the left and right Y-axis linear motors 24L, 24R. A preload is provided between the sliding members 5 and 14 to increase the bearing rigidity, and the resistance to a moment due to a cutting force acting on the saddle 4 and the slide 13 in a direction away from the column 2 and the saddle 4 increases. The saddle 4 and the slide 13 are guided and moved with high rigidity and high precision.

  Next, a description will be given of a second embodiment in which the centers of the left and right Y-axis linear motor coils in the Y-axis direction are separated above the center of rotation of the main shaft. The configuration other than the point that the center of the Y-axis linear motor coil is separated above the rotation center of the main shaft is the same as that of the first embodiment. In FIG. 5, a sliding body 14 fixed to a slide 13 'is supported by left and right Y-axis guides 12L and 12R, and a slide 13' is slidably mounted in front of the saddle 4 in the Y-axis direction. . On the front of the saddle 4, left and right Y-axis linear motor magnets 15L and 15R are disposed at the left position of the left Y-axis guide 12L and the right position of the right Y-axis guide 12R, respectively, with the magnetic pole surface facing forward and the Y-axis. The direction is fixed. The left and right Y-axis linear motor coils 19L and 19R are fixed to the left and right rear surfaces of the slide 13 'opposite to the left and right Y-axis linear motor magnets 15L and 15R, respectively. A spindle head 21 'for rotatably driving the spindle 20' is fixed to the slide 13 '. At this time, the spindle head 21 'is positioned and fixed to the slide such that the centers C in the Y-axis direction of the left and right Y-axis linear motor coils 19L and 19R are separated from the rotation center O of the spindle 20' by a predetermined amount A. Have been.

  In the second embodiment, since the center C in the Y-axis direction of the left and right Y-axis linear motor coils 19L and 19R is separated above the rotation center O of the main shaft 20 ', the left and right Y-axis linear motors 24L , 24R, the resultant force F acts above the center of rotation C of the main shaft 20 ', so that the main shaft 20' has its tip with respect to the horizontal axis so as to cancel the inclination due to its own weight whose tip is directed downward. The slide 13 'is sucked so as to face upward. As a result, a spindle head 21 ′ having the spindle 20 ′ attached thereto so as to be perpendicular to the left and right Y-axis guides 12 L, 12 R arranged vertically in the vertical direction is attached to the slide 13 ′. The main shaft 20 ′ can be oriented in the ideal horizontal axis direction only by mounting on the left and right Y-axis guides 12 </ b> L and 12 </ b> R, and the processing accuracy of the processing apparatus can be improved. Furthermore, the need for reinforcing ribs provided on slides or the like to prevent tilting of the spindle is eliminated, and moving bodies such as slides and spindle heads are reduced in size and weight to increase the moving speed and to reduce the tilt of the spindle. The cost can be reduced by eliminating the adjustment work to be performed.

  Next, third and fourth embodiments will be described. Since the other configuration is the same as that of the first embodiment except for the part for driving the table 26, the same components are denoted by the same reference numerals and detailed description is omitted. In the third embodiment, a plurality of rectangular magnet pieces 33 are provided on the upper surface of the bed 1 at the left position of the left Z-axis guide 25L and the right position of the right Z-axis guide 25R, as shown in FIGS. Each magnet piece 33 is attached to the bed 1 by a plurality of bolts 34 inserted from above into a plurality of bolt holes drilled at both ends of each magnet piece 33 with the magnetic pole faces facing upward in the Z-axis direction. The left and right Z-axis linear motor magnets 32L, 32R are configured to be detachably bolted. A plurality of bolts 35 are inserted from above into a plurality of bolt holes drilled at the left end and the right end of the table 26 and screwed to the left and right Z-axis linear motor coils 36L, 36R, and the left and right Z-axis linear Motor coils 36L and 36R are fixed to the lower surface of the left end and the lower surface of the right end of the table 26 so as to face the left and right Z-axis linear motor magnets 32L and 32R, respectively. The left and right Z-axis linear motors 32L and 37R and the left and right Z-axis linear motor coils 36L and 36R form left and right Z-axis linear motors 37L and 37R, respectively.

  In the fourth embodiment, as shown in FIGS. 8 and 9, the left and right Z-axis ball screws 38L and 38R are provided on the upper surface of the bed 1 at the left position of the left Z-axis guide 25L and the right position of the right Z-axis guide 25R. , And are rotationally driven by servo motors 39L and 39R fixed to the bed 1. Feed nuts 40L, 40R fixed on both sides of the table 26 are screwed to the left and right Z-axis ball screws 38L, 38R, respectively.

FIG. 1 is a front view of a linear motor driven machining apparatus according to an embodiment of the present invention, with a table portion omitted. The figure which looked at the linear motor drive processing apparatus from the side, omitting the table part. The figure which looked at the table part of the linear motor drive processing apparatus from the front. The figure which looked at the same linear motor drive processing apparatus from the upper side, omitting the column. The figure which looked at the Y-axis guide and spindle head part of 2nd Embodiment from the side surface. The figure which looked at the table part of 3rd Embodiment from the front. The figure which looked at the table part of 3rd Embodiment from above. The figure which looked at the table part of 4th Embodiment from the front. The figure which looked at the table part of a 4th embodiment from the upper part.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 ... Bed, 2 ... Column, 3U, 3L ... X-axis guide, 4 ... Saddle, 5, 14, 27 ... Sliding body, 6U, 6L ... Upper and lower X-axis linear motor magnet, 7, 16, 33 ... Magnet Pieces, 8, 10, 17, 18, 34, 35 ... bolts, 9U, 9L ... upper and lower X-axis linear motor coils, 11 ... through space, 12L, 12R ... left and right Y-axis guides, 13, 13 ' ... Slides, 15L, 15R ... Left and right Y-axis linear motor magnets, 19L, 19R ... Left and right Y-axis linear motor coils, 20, 20 '... Spindles, 21, 21' ... Spindle heads, 23U, 23L ... Upper and Lower X-axis linear motor, 24L, 24R: left and right Y-axis linear motors, 25L, 25R: left and right Z-axis guide, 26: table, 28L, 28 , 32L, 32R: left and right Z-axis linear motor magnets, 29L, 29R: brackets, 30L, 30R, 36L, 36R: left and right Z-axis linear motor coils, 31: rotary table, 37L, 37R: left and right Z Shaft linear motors, 38L, 38R: Left and right Z-axis ball screws, 39L, 39R: Servo motors, O: Center of rotation of main shaft, C: Center of rotation of Y-axis linear motor coil.

Claims (5)

A column upright on the bed,
Upper and lower X-axis guides provided horizontally in upper and lower positions in front of the column;
A saddle guided in the X-axis direction by the upper and lower X-axis guides, mounted on the front of the column, and formed with a through space in a central portion;
An upper and lower X-axis linear motor magnet fixed in the X-axis direction with the magnetic pole surface facing forward at the front of the column at an upper position of the upper X-axis guide and a lower position of the lower X-axis guide;
Upper and lower X-axis linear motor coils fixed to the upper and lower X-axis linear motor magnets on the upper and lower rear surfaces of the saddle so as to face the upper and lower X-axis linear motor magnets, respectively.
Left and right Y-axis guides provided vertically on both sides of the through space in front of the saddle,
A slide guided in the Y-axis direction by the left and right Y-axis guides and mounted on the front of the saddle;
Left and right Y-axis linear motor magnets fixed in the Y-axis direction with the magnetic pole faces forward in front of the saddle at the left position of the left Y-axis guide and the right position of the right Y-axis guide,
Left and right Y-axis linear motor coils fixed to the left and right Y-axis back surfaces of the slide opposite to the left and right Y-axis linear motor magnets, respectively;
A spindle head on which a spindle on which a tool is mounted is rotatably supported and integrally fixed to the slide, and a rear end portion extends into the through space;
A table on which the workpiece is mounted so as to be drivable on the bed in a Z-axis direction perpendicular to the X-axis and Y-axis directions, and
A linear motor driven machining device comprising: 2. The linear motor driven machining apparatus according to claim 1, wherein the centers of the left and right Y-axis linear motor coils in the Y-axis direction are separated from the center of rotation of the main shaft. 3. The rack according to claim 1, wherein the table is guided in the Z-axis direction by left and right Z-axis guides provided on the upper surface of the bed in a Z-axis direction perpendicular to the X-axis and Y-axis directions,
Left and right Z-axis linear motor magnets are fixed on the upper surface of the bed in the Z-axis direction facing each other with the magnetic pole surfaces vertical at the left position of the left Z-axis guide and the right position of the right Z-axis guide,
A linear motor drive machining apparatus wherein left and right Z-axis linear motor coils are fixed to a left end surface and a right end surface of the table so as to face the left and right Z-axis linear motor magnets, respectively. 3. The rack according to claim 1, wherein the table is guided in the Z-axis direction by left and right Z-axis guides provided on the upper surface of the bed in a Z-axis direction perpendicular to the X-axis and Y-axis directions,
Left and right Z-axis linear motor magnets are fixed on the upper surface of the bed in the Z-axis direction with the magnetic pole faces facing upward at the left position of the left Z-axis guide and the right position of the right Z-axis guide,
A linear motor drive machining apparatus wherein left and right Z-axis linear motor coils are fixed to a lower surface of a left end portion and a lower surface of a right end portion of the table so as to face the left and right Z-axis linear motor magnets, respectively. The table according to claim 1 or 2, wherein the table is guided and mounted on the bed in the Z-axis direction by left and right Z-axis guides provided in a Z-axis direction perpendicular to the X-axis and Y-axis directions,
Left and right Z-axis ball screws rotationally driven by a servomotor are supported on the upper surface of the bed in the Z-axis direction,
A linear motor drive machining apparatus wherein feed nuts fixed on both sides of the table are screwed into the left and right Z-axis ball screws, respectively.

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