JP2007237375A - Compound machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compound machine tool capable of rotating a spindle at high speed at the time of boring and reciprocating the spindle at high speed at the time of honing. <P>SOLUTION: A spindle drive section 11 of the compound machine tool 10 drives the spindle 32. A tool head 30 having a single point tool 100 for boring, a rough grinding wheel 102, and a fine grinding wheel 104 is provided on a pointed head of the spindle 32. The spindle drive section 11 capable of inserting the spindle 32 has a first support unit 34 and second support unit 36 which are rotatably supported with each other, a linear motor 58 and column slide mechanism 38 which make the first support unit 34 and second support unit 36 move in an axial direction of the spindle 32, and a spindle motor 44 which makes the spindle 32 rotate. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a composite machine tool including a boring tool and a grinding tool.

  The machining of the bore portion of the cylinder block of the engine part includes boring (for example, fine boring) that performs cutting so as to have a predetermined diameter, and grinding (for example, honing) performed thereafter. If such boring and grinding can be performed continuously with one spindle of one machine tool, there is no misalignment due to movement between machine tools and re-chucking, and efficient and highly accurate machining. It can be performed. In order to realize such processing, the machine tool described in Patent Document 1 is provided with a mechanism for selectively projecting the boring tool and the grinding tool outwardly on the main shaft.

  Further, in the machine tool described in Patent Document 2, the first support unit for supporting the spindle and the first support unit for omitting the oscillation mechanism for changing the spindle driving method during boring and grinding are provided. 2 support units. When boring, the first support unit and the second support unit are pressed against each other to increase rigidity, and during grinding, the second support unit is moved away from the first support unit to reduce the weight and reciprocate. Making it easy.

  Furthermore, in the machine tool of Patent Document 1, a balance weight having substantially the same weight is connected to the support unit with a wire to compensate for the weight of the support unit. However, the apparatus is large and increases in weight. .

  In connection with the honing method, the present applicant rotates and advances in a hole formed in a cylindrical shape of a tool head formed by attaching a magnet to the outer peripheral part of the tool, and ends the one end of the hole. When the tool head overrun dimensions at the one end and the other end are different from each other, the tool head advancing and retreating drive schedule according to the difference between the tool head overrun dimensions at the one end and the other end A honing method has been proposed in which a schedule that compensates for the difference in overrun dimensions of the tool head at the end portion is inserted to grind the surface without the hole portion (see Patent Document 3). In this honing method, it is desirable that the positioning accuracy of the tool head is high.

Japanese Patent Publication No. 60-52883 Japanese Patent No. 3270683 Japanese Patent No. 3735487

  By the way, in the machine tool described in Patent Document 2, the second support unit is reciprocated away from the first support unit during honing. This is to reduce the inertial mass of the moving body, accelerate the moving body quickly with a constant driving force, and reach the desired high speed of the reciprocating operation quickly.

  However, in such a mechanism, the moving body becomes lighter, but the first support unit alone has a small rigidity, so that bending is likely to occur, and the resonance point is reached with a small number of reciprocations (Hz) per unit time. It is difficult to reciprocate the moving body at high speed. Therefore, at the time of honing, the moving body becomes lighter and can be accelerated faster in terms of driving, but considering the resonance, the spindle is reciprocated at a relatively low speed, and the machining time is reduced. long. Here, the moving body refers to a main shaft, a mechanism that supports the main shaft, a mechanism that rotationally drives the main shaft, and the like.

  Further, at the time of honing, a complicated structure is required to separate the first support unit and the second support unit, the movable part becomes heavy, and it is difficult to rotate the main shaft at high speed. Therefore, the spindle is rotated at a relatively low speed during boring, and the machining time is long. The present invention has been made in consideration of such problems, and provides a composite machine tool that can rotate a spindle at a high speed during boring and can perform a high-speed reciprocating operation during honing. Objective.

  The composite machine tool according to the present invention includes a tool head having a boring tool and a grinding tool, a rotation driving means for rotating the tool head, a rotation driving force by connecting the rotation driving means and the tool head. A main shaft that transmits the main shaft, a support unit that allows the main shaft to be inserted and rotatably supported, and a moving unit that moves the support unit in the axial direction of the main shaft, while rotating the tool head. In both the case of boring processing that advances toward the workpiece and performs processing by the boring tool, and the time of grinding processing that performs the processing by the grinding tool by reciprocating while rotating the tool head, The main shaft is rotated by the rotation driving means with the same diameter.

  Thus, by rotating the main shaft with the same diameter during boring and grinding, the main shaft can be rotated at a high speed during boring, and a high-speed reciprocating operation can be performed during honing. it can.

  In this case, the moving means may be a linear motor. The moving means includes a first moving means for moving the support unit during the grinding process, and a second moving means for moving the support unit during the boring process, and at least the first moving means includes A linear motor may be used. The linear motor has no rotating part, and can move the support unit directly in a straight line without changing the direction of power, and is simple and efficient. Therefore, even if the mass of the support unit is relatively large, it can be reliably operated.

  Further, the main shaft has a bar extending in the axial direction, and the tool head is provided with an extension cone that is advanced and retracted in the axial direction by the bar and advances and retracts the boring tool and the grinding tool in the radial direction. May be.

  A plurality of the linear motors may be provided so as to face each other with the main shaft as a center.

  The main shaft may be covered with a first frame through a support mechanism, and the first moving unit may drive the first frame. Further, a second frame that supports the first moving unit and surrounds the first moving unit and the first frame may be provided, and the second moving unit may drive the second frame. .

  In the composite machine tool according to the present invention, the main shaft is rotated with the same diameter as that during boring, during honing. Therefore, the second support unit can be reciprocated at a high speed during honing without being reciprocated away from the first support unit. Furthermore, since the main shaft is rotated with the same diameter during boring, a complicated mechanism for connecting the first support unit and the second support unit is unnecessary, and high-speed rotation is possible. Become. As a result, the machining time can be shortened for both honing and boring.

  Further, the composite machine tool according to the present invention does not need to change the mechanism of the spindle during boring and grinding, so that it has a simple structure, a long life and low cost, and a mechanism changing operation. The time required is not required and the processing time is further reduced.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a composite machine tool according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the composite machine tool 10 according to the present embodiment is arranged in a processing line having, for example, a cylinder as a work W of an internal combustion engine for automobiles. On the other hand, the spindle drive unit 11 that performs actual boring and honing processing, and the workpiece that is reciprocated between the workpiece input unit provided on the front surface of the machine tool and the lower part of the spindle drive unit 11, and the input workpiece is loaded. The system is provided in the processing line as one system including a work transport mechanism 14 for transporting the placed / fixed pallet 12 and a monitoring control panel 16 for electrically controlling the spindle driving unit 11 and the work transport mechanism 14. The The spindle driving unit 11 is attached to the upper side of the horizontal base 18 on the work conveying mechanism 14 side of the column 20 rising in the vertical direction, that is, on the front surface 20a of the machine tool.

  As shown in FIGS. 2 to 4, the spindle drive unit 11 includes a spindle 32 having a tool head 30 at the tip, a first support unit 34 that rotatably supports the spindle 32, and the first support unit 34. A second support unit 36 is slidably supported in the vertical direction, and a column slide mechanism 38 is slidably supported in the vertical direction with respect to the column 20. A bar 33 communicating with the upper and lower sides is provided at the axial center of the main shaft 32.

  The first support unit 34 includes a vertically long rectangular tube-shaped first frame body 40, an extension actuator 42 that is provided in an upper portion of the first frame body 40 and rotates the main shaft 32, and the main shaft 32 and the expansion actuator 42. And a plurality of bearings (support mechanisms) 46 that rotatably support the main shaft 32 with respect to the first frame body 40. The tool head 30 of the main shaft 32 is provided so as to protrude downward from the first frame body 40. The expansion actuator 42 is connected to the bar 33, and the tool head 30 is operated via the bar 33.

  The second support unit 36 includes a vertically long rectangular tube-shaped second frame 50, a back plate 52 fixed to the second frame 50, an in-frame slide mechanism 54 that supports the first support unit 34, Two balance cylinders 56 connected to the upper end of the first support unit 34, a pair of left and right linear motors 58 that slide-drive the first support unit 34 in the vertical direction, and a column protruding from the back plate 52 in the rear surface direction. A nut body 60 that engages with the slide mechanism 38 and a brake mechanism 61 that fixes the first support unit 34 are provided.

  The second frame 50 surrounds the four sides of the first frame 40 and is set slightly longer than the first frame 40. The back plate 52 protrudes upward from the second frame body 50, and the protruding portion fixes the two balance cylinders 56 via the bracket 63. The in-frame slide mechanism 54 includes two first rails 62 provided on the surface side of the back plate 52 along the vertical direction, and a plurality of slider members 64 attached to the first rails 62 by sliding pairs. And have. The slider member 64 is fixed to the back surface of the first frame body 40 while being engaged with the first rail 62, and supports the first support unit 34 so as to be slidable.

  The pair of linear motors 58 are provided to face both side surfaces on the inner side of the second frame body 50, and are provided on the thin stator 58 a fixed to the second frame body 50 and the outer surface of the first frame body 40. Magnet 58b. By moving the magnetic field of the stator 58 a by a predetermined controller, the magnet 58 b follows and moves, and the first support unit 34 slides vertically with respect to the second support unit 36 along the first rail 62. Become.

  Further, since both the linear motors 58 are disposed so as to face each other about the main shaft 32, the attractive force and the repulsive force between the both stators 58a and the magnets 58b due to the movement of the magnetic field of the stator 58a are offset. The first support unit 34 can be moved smoothly.

  By the way, since the ball screw type direct drive means transmits rotation, a ball screw male screw and a female screw (nut), a bearing for supporting the ball screw male screw, a cup for connecting the power source and the ball screw male screw. There is a mechanism such as a ring. In the ball screw type linear motion drive means, twisting and backlash occur in these mechanism parts, and an error tends to occur in the target value in the actual position.

  On the other hand, the linear motor 58 of the composite machine tool 10 does not have such a mechanism portion, so that there is less error between the target position and the actual position than the ball screw type linear motion drive means. In addition, the linear motor 58 has a linear encoder (not shown) (consisting of a scale and a head attached to a moving body). Depending on the resolution of the linear encoder, positioning accuracy of about ± 0.5 to 1.0 μm is possible. It is said. This is an error of about 1/10 compared with the ball screw type linear motion drive means.

  Therefore, the composite machine tool 10 is suitably used for a honing method (for example, the method described in Patent Document 3) in which the positioning accuracy of the tool head is important.

  Further, the linear motor 58 can move the moving body at a high speed while maintaining the accuracy as compared with the ball screw type linear motion driving means. Specifically, even with a ball screw type linear motion drive means, it is possible to move at a high speed, but to increase the speed with this method is to increase the lead pitch of the ball screw. Although the speed can be increased, the resolution and positioning accuracy are reduced.

  Since the positioning accuracy of the linear motor 58 is determined by the resolution of the linear encoder, the positioning accuracy is not lowered by increasing the speed, and is suitable for honing.

  The balance cylinder 56 has a downward rod 56a connected to the upper end portion of the first support unit 34, and compensates (cancels) part or all of the weight of the first support unit 34 by the action of compressed air. Therefore, the apparent weight of the first support unit 34 is substantially zero, and the linear motor 58 can move or hold the first support unit 34 with a small force.

  Further, even if the balance cylinder 56 is small, a sufficient force can be generated by the compressed air, and the spindle drive unit 11 is configured to be lighter and more compact than a conventional weight compensation device using a balance weight type. Can do.

  Further, in the conventional balance weight type weight compensation device, when the inertial mass of the movable body is the first support unit 34, the mass of the first support unit 34 and the mass of the balance weight are combined. Therefore, a great amount of force is required to accelerate the moving body by applying force.

  However, in the method using the balance cylinder 56 in the composite machine tool 10, the inertial mass of the moving body is only the first support unit 34. Can be accelerated quickly.

  Furthermore, in the composite machine tool 10, the weight compensation amount may be changed in real time according to the acceleration. Specifically, when increasing or decreasing the compensation amount or accelerating the moving body upward, actively increase the pressure in one cylinder to compensate for upward acceleration, and when accelerating the moving body downward, The internal pressure of the other cylinder chamber may be increased to compensate for downward acceleration.

  The brake mechanism 61 includes a brake plate 66 provided along the vertical direction on the back surface of the first support unit 34, and a brake pad 68 that sandwiches and fixes the brake plate 66. The brake pad 68 is provided on the surface of the back plate 52, and opens and closes under the action of a predetermined controller to sandwich the brake plate 66. According to the brake mechanism 61, the first support unit 34 can be securely fixed without energizing the linear motor 58.

  The column slide mechanism 38 is installed in the upper part of the column 20 and is positioned so that the motor shaft 70a faces downward, and a ball screw 74 connected to the motor shaft 70a by a shaft coupling 72. A bearing member (not shown), two second rails 76 provided on the surface 20a side of the column 20 along the vertical direction, and a plurality of slider members attached to the second rails 76 by sliding pairs. 78. The slider member 78 is fixed to the back surface of the back plate 52 while being slidably engaged with the second rail 76, and supports the second support unit 36 so as to be slidable.

  The nut body 60 is screwed into the ball screw 74 and moves when the slide drive motor 70 rotates, and the second support unit 36 slides up and down with respect to the column 20 along the second rail 76. It will be.

  The tool head 30 includes a cutting tool (boring tool) 100 that is a boring tool at the tip, and a roughing grindstone (grinding tool) 102 that is a honing tool and a finishing grindstone (finishing tool) on the body. Grinding tool) 104.

  As shown in FIG. 5, three each of the roughing grindstone 102 and the finishing grindstone 104 of the tool head 30 are provided. The roughing grindstones 102 are arranged at equal intervals of 120 °, and are fixed to the grindstone base 106, respectively. The finishing grindstones 104 are arranged at equal intervals of 120 °, and are respectively fixed to the grindstone table 108. The interval between the adjacent roughing grindstone 102 and the finishing grindstone 104 is set to 60 °.

  The grinding wheel platform 106 and the grinding wheel platform 108 are each guided by the guide holes 110 and are slidable in the radial direction. In the hollow portion of the tool head 30, there are provided expansion cone shafts 112 and 114 for advancing and retracting the grindstone platform 106 in the radial direction. Although not shown, the expansion cone shaft 112 has an inclined surface capable of cam-driving the grindstone table 106, and each roughing grindstone 102 is moved up and down in the axial direction of the expansion cone shaft 112. Can be advanced and retracted in the radial direction. Similarly, the expansion cone shaft 114 has an inclined surface capable of cam-driving the grindstone table 108, and each of the finishing grindstones 104 is moved in the radial direction by moving the expansion cone shaft 114 in the axial direction. Can be advanced or retreated. The expansion cone shafts 112 and 114 are advanced and retracted through the bar 33 by the expansion actuator 42.

  The above-mentioned cutting tool 100 is fixed to a tool post (not shown), and is guided by guide holes (not shown) similar to the grindstone stands 106 and 108, and can be expanded and contracted in the radial direction. As with the grinding wheel platforms 106 and 108, the expansion cone shaft 112 or 114 can be advanced and retracted in the radial direction by a cam driving action.

  The tool head 30 has an air nozzle 120 that measures the inner diameter of the hole H based on the pressure or flow rate while jetting compressed air.

  Next, an operation of machining the hole H of the workpiece W by the composite machine tool 10 configured as described above will be described.

  First, under the action of the workpiece conveyance mechanism 14, the workpiece W is conveyed and fixed so that a hole (such as a bore portion of a cylinder) H is directly below the tool head 30. Further, the first support unit 34 is fixed to the second support unit 36 by holding the brake plate 66 with the brake pad 68 of the brake mechanism 61. The roughing grindstone 102 and the finishing grindstone 104 are degenerated in the guide hole 110.

  Next, the spindle 32 and the tool head 30 are rotated by the spindle motor 44, and the ball screw 74 is rotated by the slide drive motor 70, so that the second support unit 36 and the first support unit 34 are moved downward at a predetermined speed. Boring is performed by the cutting tool 100 so that the hole H has a predetermined diameter. At this time, the main shaft 32 is set to a diameter having sufficient rigidity, and can be rotated at a high speed because it has a simple hollow shape without a separation mechanism and a connection mechanism. Can be done quickly.

  Further, at the time of boring, since the first support unit 34 is fixed by the brake mechanism 61, the linear motor 58 does not need to be energized.

  After boring the hole H to a predetermined depth, the slide drive motor 70 is reversed, the first support unit 34 and the second support unit 36 are raised appropriately, and the spindle motor 44 is stopped.

  Next, an appropriate amount of the roughing grindstone 102 protrudes in the radial direction under the action of the expansion cone shaft 112, and the brake plate 66 is opened by opening the brake pad 68 of the brake mechanism 61, and the first support unit 34 is moved up and down. Make it possible.

  Next, rough honing is performed. That is, the rotation of the spindle motor 44 is resumed and the first support unit 34 is reciprocated by an appropriate amount under the action of the linear motor 58. At this time, since the slide drive motor 70 is stopped, the second support unit 36 is fixed to the column 20, and the first support unit 34 reciprocates with respect to the column 20 and the second support unit 36. To do. Thus, rough honing is performed by the roughing grindstone 102 coming into contact with the inner surface of the hole H through a combined route of rotation and elevation.

  Further, since the first support unit 34 is compensated for its own weight by the balance cylinder 56, an excessive load is not applied to the linear motor 58, and the first support unit 34 can be moved up and down with low power. Furthermore, a linear system in which the load magnitude is balanced when the first support unit 34 is raised and lowered is improved, and the control characteristics are improved.

  Since the first support unit 34 and the main shaft 32 have sufficient rigidity, the first support unit 34 and the main shaft 32 are not bent, can be moved up and down at high speed, and the processing time can be shortened. Further, the linear motor 58 has no rotating part, and can directly move the first support unit 34 without changing the direction of power, and is simple and efficient. Even if the mass is relatively large, it can be reliably operated.

  After the rough honing is finished, the spindle motor 44 and the linear motor 58 are stopped, and then the roughing grindstone 102 is degenerated and the finishing grindstone 104 is projected. That is, the roughing grindstone 102 is retracted into the guide hole 110 under the action of the expansion cone shaft 112 and the finishing grindstone 104 is protruded in the radial direction by an appropriate amount under the action of the expansion cone shaft 114.

  Next, finish honing is performed. That is, as in the rough honing process, the rotation of the spindle motor 44 is resumed and the first support unit 34 is reciprocated by an appropriate amount under the action of the linear motor 58. As a result, the finishing grindstone 104 is brought into contact with the inner surface of the hole H through a combined route of rotation and elevation, and finishing honing is performed. Even in the finish honing process, as in the rough honing process, the effect of being simple and efficient and reducing the processing time can be obtained.

  Thereafter, the spindle motor 44 and the linear motor 58 are stopped, and post-processing such as measurement confirmation by the air nozzle 120 is performed. Furthermore, while fixing the 1st support unit 34 with the brake mechanism 61, the 1st support unit 34 and the 2nd support unit 36 are raised under the effect | action of the drive motor 70 for a slide, the main axis | shaft 32 is extracted from the hole H, Finish processing.

  By the way, in the machine tool described in Patent Document 2, during the honing process, the honing spindle inserted in the boring spindle and the tool head are moved back and forth, that is, inserted. Therefore, it is necessary to make it thinner than the boring spindle, so that sufficient rigidity cannot be obtained, and there is a possibility of resonating at a certain number of reciprocating operations (frequency) per unit time.

  On the other hand, in the composite machine tool 10, the spindle 32 is rotated with the same diameter during boring and honing. That is, the spindle 32 can be mechanically handled in the same manner during boring and honing, and an auxiliary mechanism or the like for changing the diameter is unnecessary, and the spindle 32 is operated at high speed during boring. In addition to being able to rotate, high-speed reciprocation can be performed during honing.

  That is, at the time of honing, since the first frame body 40 that supports the main shaft 32 is provided outside the boring main shaft (main shaft 32), the moving body is the first frame body 40 and the main shaft 32. The cross-sectional area is larger than that of the boring spindle 32, and sufficient rigidity can be ensured. There is no possibility of resonance even when the reciprocating operation is performed at high speed.

  Even if the weight of the moving body increases, the weight is compensated by the balance cylinder and the inertial mass of the moving body is smaller than that of the balance weight type weight compensator, so that the reciprocating operation can be performed at a sufficiently high speed. Processing time is shortened.

  Further, the linear motor 58 is suitable for honing because it can be operated at a higher speed while maintaining positioning accuracy. In the machine tool described in Patent Document 2, the boring spindle and the honing spindle are machined integrally during boring, but this is to ensure the rigidity of the rotating body. This is because cutting resistance is larger than honing.

  In the multi-task machine tool 10, the boring spindle has the same diameter as that of the conventional drilling machine and does not have a separation mechanism for honing, so the inertial mass of the rotating body is reduced accordingly, and high-speed rotation is reduced. This makes it possible to further reduce the processing time.

  Further, according to the composite machine tool 10, it is not necessary to change the mechanism of the spindle during boring, so that it has a simple structure, a long life and low cost, and time required for the mechanism changing operation. It is unnecessary and the processing time is further shortened.

  In the main shaft drive unit 11 described above, the main shaft 32 is attached to the column 20 via the first support unit 34, the second support unit 36, and the column slide mechanism 38, but the main shaft drive shown in FIGS. It is good also as a further simple structure like the part 11a. Hereinafter, the same components as those of the composite machine tool 10 in the spindle drive unit 11a are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 6 and 7, the main shaft 32 of the main shaft drive unit 11 a is attached to the column 20 via the first support unit 34, and the second support unit 36 and the column slide mechanism 38 in the composite machine tool 10 are Omitted in development.

  Moreover, the 1st rail 62 is provided in the surface 20a of the column 20, and is supporting the 1st support unit 34 so that raising / lowering is possible. The column 20 is provided with a second frame body 50 a having substantially the same shape as the second frame body 50 so as to surround the first support unit 34. Linear motors 58 are provided on both inner side surfaces of the second frame body 50 a so that the first support unit 34 can be moved up and down with respect to the column 20. A brake pad 68 of the brake mechanism 61 is provided on the column 20 so that the first support unit 34 can be fixed to the column 20.

  In the main shaft drive unit 11a, the linear motor 58 moves the first support unit 34 in both the operations of lowering the main shaft 32 during boring and the operation of moving the main shaft 32 up and down during rough honing and finishing honing. The main shaft 32 is moved. That is, since all the raising and lowering operations of the main shaft 32 are performed by the linear motor 58 during the processing of the hole H, the second support unit 36 and the column slide mechanism 38 can be omitted, and the structure is simpler.

  Further, in the spindle driving section 11a, as in the case of the composite machine tool 10, an effect is obtained that it is simple and efficient, and the machining time can be shortened. In addition, since the linear motor 58 of the spindle drive unit 11a performs boring processing in addition to honing processing, a composite that uses the linear motor only by honing processing so that the pressing force required for boring processing can be generated. A type having a larger output than the rated output of the linear motor 58 in the machine tool 10 may be used.

  The composite machine tool according to the present invention is not limited to the above-described embodiment, but can of course adopt various configurations without departing from the gist of the present invention.

It is a perspective view of the compound machine tool concerning this embodiment. It is a sectional side view of a main-axis drive part. It is a section front view of the 1st support unit. It is a cross-sectional top view of a main-axis drive part. It is a cross-sectional top view of a tool head. It is a section side view of the main-axis drive part concerning a modification. It is a section top view of the main-axis drive part concerning a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Composite machine tool 11, 11a ... Main shaft drive part 20 ... Column 30 ... Tool head 32 ... Main shaft 34 ... First support unit 36 ... Second support unit 38 ... Column slide mechanism 44 ... Main shaft motor 54 ... In-frame slide mechanism 56 ... balance cylinder 58 ... linear motor 61 ... brake mechanism 70 ... slide drive motor 74 ... ball screw 100 ... bite 102 ... roughing wheel 104 ... finishing wheel

Claims (3)

A tool head having a boring tool and a grinding tool;
Rotation driving means for rotating the tool head;
A main shaft for transmitting a rotational driving force by connecting the rotational driving means and the tool head;
A support unit that is insertable and rotatably supported by the spindle;
Moving means for moving the support unit in the axial direction of the main shaft;
With
Grinding in which the tool head is advanced toward the workpiece while being rotated and boring is performed with the boring tool, and grinding is performed with the grinding tool by reciprocating while rotating the tool head. In both cases during machining, the spindle is rotated by the rotation driving means while maintaining the same diameter. The compound machine tool according to claim 1,
The complex machine tool, wherein the moving means is a linear motor. The compound machine tool according to claim 1,
The moving means includes first moving means for moving the support unit during the grinding process;
Second moving means for moving the support unit during the boring process;
With
At least the first moving means is a linear motor.

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