JP2007301673A - Machine tool system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machine tool system which has high efficiency in conveying a work between machine tools and has a compact structure. <P>SOLUTION: The machine tool system 10 is provided with first and second machine tools 11a and 11b adjacent with each other in parallel, a controller 12, and a work moving device 14. The first and second machine tools 11a and 11b respectively have rotary arms 32 rotatable 360 degrees in a vertical plane and machining main spindles 36 arranged on the rotary arms 32. The work moving device 14 has a turn table 150 rotatable in a horizontal plane, three sub-rotation mechanisms 152 for setting a machining surface of the work W in a direction opposing to a machining main spindle 36 by rotating on the turn table 150, and a main rotation mechanism 156 for intermittently rotating the turn table 150 so as to arrange the second rotation mechanism 152 on a first retaining position 154a, second retaining position 154b, and third retaining position 154c in 120° intervals. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a machine tool system provided with a plurality of machine tools each having a rotating arm that rotates in a vertical plane and a machining spindle that is horizontally oriented near the tip of the rotating arm.

  The machine tool preferably has a small occupied area, and particularly preferably has a small width in a front view, from the viewpoints of space efficiency of installation, transfer of workpieces to adjacent machine tools, and operator operability. In order to reduce the occupied area in this way, for example, Patent Document 1 proposes a machine tool in which two spindle units capable of moving up and down and horizontally are provided on a movable column that can be moved back and forth in the horizontal direction. . The machine tool of Patent Document 1 is suitable for low cost and space saving.

  Further, Patent Document 2 proposes an NC lathe capable of improving productivity by saving space and increasing the number of installed units per unit area with a configuration in which the machining axis is directed in the vertical direction.

  By the way, in the machine tool described in the cited document 1 and the cited document 2, since the biaxial slide mechanism orthogonal to the front view is provided, the structure is complicated, and the heavy slide member moves. Therefore, in order to obtain sufficient stability, the base portion must be set to be considerably strong, and the overall weight increases.

  From such a viewpoint, Patent Document 3 proposes a machine tool that is provided with an arm that rotates in a vertical plane with respect to a horizontal slide mechanism and that is displaced in the vertical direction by rotating the arm. According to such a machine tool, the slide mechanism in front view is sufficient for one axis, which is preferable because it can have a simple configuration.

Japanese Patent No. 3278135 Japanese Patent No. 2003-266203 Japanese Patent Publication No. 5-2446

  The machine tool described in Patent Document 3 has a simple configuration, but has a two-axis slide mechanism (X table and Z table) orthogonal to each other on a horizontal plane, and the occupied area is not necessarily limited. Not small. Further, since the X-direction slide mechanism is provided in front view, the machine width is not necessarily narrow.

  Therefore, when a mechanism that is rotated 90 ° so that the horizontal X-direction slide mechanism of the machine tool in Patent Document 3 is in the vertical direction, the machine width in a front view becomes very small. However, even if the machine width and the installation area of the machine tool are reduced, the transfer of workpieces between the machine tools is not automated, or even if it is automated, a mechanism with a slow transfer results in a longer machining time. It is not efficient.

  Furthermore, if the mechanism for transporting the workpiece and the mechanism for fixing the workpiece at the time of machining are different, it is necessary to transfer the workpiece between both mechanisms, and the mechanism and the machining procedure become complicated. Furthermore, if these mechanisms are complicated and large, the purpose of downsizing the machine tool itself will be lost.

  The present invention has been made in consideration of such problems, and an object of the present invention is to provide a machine tool system having a compact configuration and high work transfer efficiency between machine tools.

  A machine tool system according to the present invention is a machine tool system including a first machine tool and a second machine tool, and a workpiece moving device that holds a workpiece processed by the first machine tool and the second machine tool. The first machine tool and the second machine tool are each a column that slides in the Z direction, which is one direction in a horizontal plane, and a support that is provided on the column and slides in the vertical direction. , A rotary arm that rotates 360 ° in a vertical plane facing the workpiece that is supported by the support and faces in the Z direction, an arm drive source that rotates the rotary arm, and a position away from the center of rotation on the rotary arm A machining spindle that is rotatably supported with respect to the rotary arm and oriented in the Z direction, and a spindle drive source that rotates the machining spindle, and the workpiece The moving device includes a turntable rotatable on a horizontal plane, a plurality of sub-rotation mechanisms provided on the turntable, configured to rotate on a horizontal plane and set a machining surface of the workpiece in a direction facing the machining spindle, and the sub-rotation mechanism One of the rotation mechanisms is a first holding position facing the machining spindle of the first machine tool, and the other one of the auxiliary rotation mechanisms is opposed to the machining spindle of the second machine tool. And a main rotation mechanism for intermittently rotating the turntable so as to be in the second holding position.

  As described above, by intermittently rotating the turntable by the main rotation mechanism and setting the work in a predetermined direction by the sub-rotation mechanism, it is possible to improve work transfer efficiency between machine tools with a compact configuration.

  In this case, if the columns of the first machine tool and the second machine tool are arranged in parallel, the lateral width of the machine tool system can be set narrow.

  According to the machine tool system of the present invention, the turntable is intermittently rotated by the main rotation mechanism, and the workpiece is set in a predetermined direction by the sub rotation mechanism, so that the work transfer efficiency between machine tools can be reduced with a compact configuration. Improvements can be made.

  In addition, the workpiece can be transported and positioned for machining with a simple rotational motion, the cycle time can be shortened, and the transport procedure is simple.

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

  1 to 3 are a perspective view, a front view, and a side view of a machine tool system 10 according to the present embodiment. As shown in FIGS. 1 to 3, the machine tool system 10 according to the present embodiment performs drilling, boring, honing, and the like on the workpiece W, and is a front view (see FIG. 2). ). Hereinafter, in order to specify the orientation of the machine tool system 10, the left-right direction in FIG. 2 is the X direction, the height direction is the Y direction, and the depth direction perpendicular to the X direction and the Y direction is the Z direction (see FIG. 3). And The X direction and the Y direction are predetermined one directions in the horizontal plane and are orthogonal to each other.

  The machine tool system 10 includes a first machine tool 11a on the left side and a second machine tool 11b on the right side as viewed from the front, and a controller that controls the first machine tool 11a and the second machine tool 11b in an integrated and cooperative manner. Twelve. The first machine tool 11a and the second machine tool 11b are adjacently provided in parallel, and the surface plate 13, the workpiece moving device 14, and the frame 15 are shared. Of course, the surface plate 13, the workpiece moving device 14, and the frame 15 may be dedicated to the first machine tool 11a and the second machine tool 11b. The first machine tool 11a and the second machine tool 11b have the same structure, and the first machine tool 11a will be described below as a representative.

  The first machine tool 11a is configured based on a surface plate 13 fixed to the floor. The surface plate 13 is narrow in the X direction and low in the Y direction. A workpiece moving device 14 and a frame 15 are attached to the surface plate 13. The workpiece moving device 14 is provided in the vicinity of the front side (arrow Z1 side) of the upper surface of the surface plate 13, and workpiece pressing and fixing devices 17a and 17b (see FIG. 3) are provided above the workpiece moving device 14. It has been. In addition, in order to visually recognize the support body 22, the rotation arm 32, etc., in FIG.1, FIG.2, FIG.5 and FIG. 8, the workpiece press fixing devices 17a and 17b are abbreviate | omitted and illustrated. Details of the workpiece moving device 14 and the workpiece pressing and fixing devices 17a and 17b will be described later.

  The frame 15 is for supporting rotating magazines (automatic tool change mechanisms) 80a and 80b and sub stockers 100a and 100b, which will be described later. The frame 15 extends upward from both ends of the surface plate 13 in the arrow Z direction. It has the support | pillar 15a and the plate 15b supported through these support | pillars 15a.

  The first machine tool 11a includes a pair of Z rails 16 provided on the upper surface of the surface plate 13 and extending in the Z direction, a column 18 guided by the Z rails 16 and slid in the Z direction, It has a pair of Y rails 20 extending in the Y direction on the front surface, and a support 22 that is guided by the Y rails 20 and slides in the Y direction. The position of the column 18 in the Z direction on the Z rail 16 is detected by the Z position sensor 16a, and the position of the support 22 in the Y direction on the Y rail 20 is detected by the Y position sensor 20a and is supplied to the controller 12, respectively. .

  The column 18 moves in the Z direction via a ball screw mechanism 26 under the action of a Z motor 24 provided behind the surface plate 13. The support 22 reciprocates in the Y direction via the ball screw mechanism 30 under the action of the Y motor 28 disposed inside the surface plate 13. The column 18 and the Y rail 20 have an appropriately long shape in the Y direction, and can move the support 22 for a relatively long distance.

  As shown in FIG. 4, the support 22 includes a rotary arm 32 that rotates in a vertical plane facing the workpiece W facing in the Z1 direction, an arm motor (arm rotation drive source) 34 that rotates the rotary arm 32, and A machining spindle 36 provided near the end of the rotating arm 32 in the centrifugal direction and rotatably supported on the rotating arm 32 and oriented in the Z1 direction, and a spindle motor (spindle rotation drive source) that rotates the machining spindle 36 38. The arm motor 34 is, for example, a direct motor.

  The support body 22 is configured based on a frame body 40, and an arm motor 34 is provided inside the frame body 40. The arm motor 34 has a stator 34a fixed to the frame body 40 and a hollow rotor 34b provided inside the stator 34a.

  The rotary arm 32 is fixed to the end of the rotor 34b in the arrow Z1 direction, and rotates under the action of the arm motor 34. The angle of the rotary arm 32 with respect to the support 22 is measured by the angle sensor 41 and supplied to the controller 12.

  As is clear from FIG. 4, the rotary arm 32 can be rotated endlessly, but it is sufficient that it can be rotated at least once (360 °). The machining spindle 36 is provided at a location separated from the rotation center C of the rotary arm 32 by a distance R. The length from the rotation center C to the outer end of the rotation arm 32 is L.

  In the rotary arm 32, a balancer 42 is provided on the opposite side (upper side in FIG. 4) to the side on which the machining spindle 36 is provided. The balancer 42 is a liquid tank containing a liquid such as coolant, and can balance by changing the amount of liquid inside according to the tool attached to the machining spindle 36. The balancer 42 may be a metal weight. The inside of the rotary arm 32 other than the portion where the balancer 42 is provided has a hollow structure. The rotary arm 32 is considerably lighter than the support body 22, and does not impair the stability of the support body 22 and the first machine tool 11a when rotated.

  The spindle motor 38 protrudes in the direction of the arrow Z2 and is fixed to the rear surface of the frame body 40 in the support 22 so as to be coaxial with the arm motor 34. Since the spindle motor 38 and the arm motor 34 are arranged coaxially, the support 22 can be configured as a compact unit. That is, if the spindle motor 38 does not exist on the axis of the machining spindle 36 and the spindle motor 38 is located near the center of the rotating arm 32, the mass and size of the balancer 42 can be reduced, and the support 22 can be reduced. Can be made compact as a whole. Therefore, it is preferable that the axis of the spindle motor 38 is coaxial with the axis of the rotary arm 32.

  The shaft (power transmission portion) 44 is provided through the hollow portion of the rotor 34 b, one end is fixed to the rotating shaft of the spindle motor 38, and the other end protrudes from the frame body 40 to the arrow Z 1 side of the rotating arm 32. The side plate is reached. The shaft 44 is pivotally supported by bearings 45a, 45b, and 45c in this order at three locations, an arrow Z1 side end of the rotary arm 32, an arrow Z2 side end, and an arrow Z2 side end of the frame body 40.

  The pulley mechanism 46 includes a drive pulley 46a fixed to the shaft 44 between the bearing 45a and the bearing 45b, a driven pulley 46b fixed to the end of the machining spindle 36 in the arrow Z2 direction, and the drive pulley 46a and the driven pulley 46a. And a belt 46c stretched between the pulley 46b. In addition, a drive mechanism using a pulley is preferable because the rotary arm 32 can be reduced in weight.

  In addition to the drive mechanism using a pulley, for example, the drive pulley 46a may be replaced with a gear, and the driven pulley 46b may be replaced with a pinion, and a drive transmission mechanism using a silent chain may be used. In this case, the driving force may be transmitted between the gear and the pinion via a plurality of gears.

  The pulley mechanism 46 is provided in a hollow portion in the rotary arm 32, and the tension of the belt 46c is adjusted by a predetermined tension mechanism. With such a structure, the rotation of the spindle motor 38 is transmitted to the machining spindle 36 via the shaft 44 and the pulley mechanism 46.

  The machining spindle 36 is accommodated in a spindle cover 48 that is provided integrally with the rotary arm 32, and a tool head 50 to which a tool T is mounted is provided at the tip in the direction of the arrow Z1. In addition, an unclamp lever 52 that releases the tool T from the tool head 50 and allows the tool T to be detached is provided at the end in the direction of the arrow Z2. The unclamp lever 52 has a shape that protrudes slightly outward as viewed from the rotation center C, and is operated by being pressed in the direction of the rotation center C by an unclamp block 78 described later to unclamp the tool T. Can do. The unclamp lever 52 is returned to its original position by an elastic body (not shown) when the unclamp block 78 is separated, and the tool T in the tool head 50 can be clamped.

  A fixing device 64 is provided on the back side of the rotating arm 32 (arrow Z2 side) to hold the rotating arm 32 at a predetermined position by holding a disk 62 made of a leaf spring or the like with a screw 60.

  The fixing device 64 includes a receiving seat 66 that contacts the back side of the disc 62, and a pressing piece 68 that holds the disc 62 between the receiving seat 66. The pressing piece 68 is urged in the holding direction by a disc spring 70. It is provided at the tip of the rod 72 to be pushed, and the rod 72 is pushed forward against the disc spring 70 to release the holding state of the disk 62, and the rotation arm 32 can be rotated.

  In this embodiment, since the disk 62 is configured by a leaf spring, the rotation of the rotating arm 32 is reliably prevented without falling by holding the disk 62.

  As shown in FIG. 5, an unclamp block 78 for pressing the unclamp lever 52 is provided on the surface of the upper side of the column 18 in the first machine tool 11a on the arrow Z1 side. Therefore, the tool 22 in the tool head 50 can be unclamped by operating the unclamp lever 52 by the unclamp block 78 by raising the support body 22 with the rotary arm 32 directed upward. .

  A rotating magazine 80a that stores a plurality of tools T that can be attached to and detached from the machining spindle 36 is provided on the upper and slightly left side of the plate 15b in the frame 15 so as to correspond to the first machine tool 11a. Note that a rotating magazine 80b having the same mechanism as the rotating magazine 80a is provided on the upper surface and slightly right side of the plate 15b in the frame 15 in correspondence with the second machine tool 11b. Hereinafter, the rotation magazine 80a will be described as an example.

  The rotary magazine 80a has a rotary shaft 82 extending in the direction of the arrow Z, a magazine motor 83 that drives the rotary shaft 82, and a radial shape in a range of approximately 270 ° from the front of the rotary shaft 82 (see FIG. 2). And a holding arm 84 provided on the head. A C-shaped grip for holding the tool T is provided at the tip of each holding arm 84. The grip is an elastic body, and when the tool T is pushed in from the C-shaped opening, the tool T can be elastically expanded so that the tool T can be inserted, and after the insertion, the tool T can be closed to hold and hold the tool T. it can. The held tool T can be pulled out from the C-shaped opening.

  In the rotating magazine 80a, a portion of approximately 90 ° without the holding arm 84 is usually downward, and the whole is above the plate 15b, so that the operation of the column 18 and the support 22 is not hindered. When exchanging the tool T of the tool head 50, the rotary magazine 80a is rotated to direct a predetermined holding arm 84 downward from the end of the plate 15b (see FIG. 5).

  Specifically, an empty holding arm 84 that does not hold the tool T is directed downward, and after adjusting the position of the column 18 in the Z direction, the support 22 is raised. As a result, as shown in FIG. 6, the tool T is held by the holding arm 84, and the unclamp lever 52 is operated in contact with the unclamp block 78, and the tool T is unclamped with respect to the tool head 50. The Therefore, the tool T is extracted from the tool head 50 by retracting the column 18 in the direction of the arrow Z2.

  Next, the rotary magazine 80a is rotated so that the holding arm 84 holding the tool T to be used in the future is directed downward, and the column 18 is advanced in the arrow Z1 direction. As a result, the target tool T is inserted into the tool head 50, and the unclamp lever 52 can be separated from the unclamp block 78 to clamp the tool T by lowering the support 22. Thereafter, the rotary magazine 80a is rotated so that all the holding arms 84 are arranged above the plate 15b.

  As described above, there is no intervening mechanism for transferring the tool T halfway between the rotary magazine 80a and the machining spindle 36, and the tool T is attached and detached under the operation of the column 18, the support 22 and the rotary arm 32. The operation can be performed directly. This eliminates the need for a dedicated attachment / detachment mechanism and the like, thus providing a simple structure and reducing the time required for attaching / detaching the tool.

  As is clear from FIG. 2, the rotary magazine 80a is provided on the upper part of the first machine tool 11a, and can store a large number of tools T without increasing the installation area. If the rotation center axis of the rotary arm 32 and the rotation axis 82 of the rotary magazine 80a are arranged on the same vertical plane, the force vector generated as the rotary arm 32 moves up and down is directed in the direction of the rotary magazine 80a. Direction and moment do not occur. This will be discussed with the models of FIGS. 7A and 7B. The mass point M1 in FIGS. 7A and 7B indicates the center of gravity of the rotating magazine 80a, the mass point M2 indicates the center of gravity of the support 22, and the friction damper D connecting these mass points M1 and M2 is a rotating magazine. An equivalent mechanism of a connecting portion such as the rail 20 and the frame 15 between 80a and the support 22 is shown. The mass point M2 varies depending on the angle of the rotating arm 32. Since the mass of the rotating arm 32 is smaller than the mass of the support 22, the variation range is small and can be omitted in this model.

  As shown in FIG. 7A, when the mass point M1 and the mass point M2 are arranged on the same vertical plane, the mass point M2 moves in the vertical direction along the rail 20 because it indicates the support body 22. The vector V indicating the movement points in the direction of the mass point M1. That is, the vector V generates only a force that expands and contracts the friction damper D, does not generate a moment, and does not generate a force that rotates the model.

  On the other hand, as shown in FIG. 7B, when the mass point M1 and the mass point M2 are arranged at positions that are not on the same vertical plane, the vector V indicating the movement of the mass point M2 is vertically oriented. Therefore, a force F1 for expanding and contracting the friction damper D and a moment M = F2 · a for rotating the model are generated. Here, the force F2 is a component force of the force indicated by the vector V in the direction orthogonal to the extending direction of the friction damper D, and the parameter a is the length of the friction damper D at that time.

  That is, from these models, if the rotation center axis of the rotation arm 32 and the rotation axis 82 of the rotation magazine 80a are not on the same vertical plane, a moment M that rotates the first machine tool 11a is generated, and shaking may occur. It will be understood that when the rotation center axis of the rotation arm 32 and the rotation axis 82 of the rotation magazine 80a are arranged on the same vertical plane, moment and vibration do not occur and stability is high.

  Next, the sub stockers 100a and 100b will be described. As shown in FIG. 1, the left side surface of the frame 15 is provided with a sub stocker 100a that stores a plurality of tools T that can be attached to and detached from the machining spindle 36 corresponding to the first machine tool 11a. Similarly, the right side surface of the frame 15 is provided with a sub stocker 100a corresponding to the second machine tool 11b and a sub stocker 100b having a bilaterally symmetrical mechanism. The sub stocker 100a and the sub stocker 100b are provided symmetrically and have a good balance. Hereinafter, the sub stocker 100a will be described as an example.

  The sub stocker 100a includes a circulation rotation means 102 such as a chain and a timing belt, a guide wheel 104 such as a pulley and a sprocket that supports the circulation rotation means 102 at four corners, and a plurality of (for example, 40) provided in the circulation rotation means 102. Holding arm 106, a tool delivery mechanism 108 (see FIG. 8) for attaching and detaching the tool T held by the holding arm 106, and a guide arm 104 by intermittently driving the guide wheel 104. A motor (index mechanism) 109 that causes any one of 106 to be arranged on the tool delivery mechanism 108 is provided. The sub stocker 100a has a shape that is long in the Z direction along the side wall in a side view (see FIG. 3). Further, when viewed from the front (see FIG. 2), the width in the X direction is very short, and the length of the tool T to be held is substantially the width in the X direction. The holding arm 106 is the same mechanism as the holding arm 84 described above, and can hold the tool T in a direction protruding in the arrow X direction.

  As shown in FIG. 8, the tool delivery mechanism 108 is provided in the vicinity of the end in the direction of arrow Z1 of the sub stocker 100a, and a cylinder 110 supported on a bracket 103 so as to be able to swing on a pedestal having no reference numeral, And a chuck 111 provided at the tip of the rod 110a of the cylinder 110. The tool delivery mechanism 108 grips a part of the holding arm 106 arranged at the end of the sub stocker 100a in the arrow Z1 direction with the chuck 111, and rotates the holding arm 106 and the tool T by 90 ° by extending and contracting the rod 110a. it can. As a result, the holding arm 106 is directed in the arrow X direction, and the tool T is directed in the arrow Z direction. In this state, the tool T can be mounted by advancing the machining spindle 36 in the arrow Z1 direction. Further, the tool T can be extracted from the machining spindle 36 and returned to the holding arm 106 by the reverse operation.

  Since the sub stocker 100a including such a tool delivery mechanism 108 has a long tool axis direction in one direction, it is preferable that a large number of tools T can be held. Further, since the tool axis direction can be changed and directed in the direction of the arrow Z1 with a simple tool delivery mechanism, a larger number of tools can be handled, and the degree of freedom of the installation position of the sub stocker 100a is improved.

  The rotary magazine 80a and the sub stocker 100a can both store the tool T, but may be used properly according to the application. For example, the tool T required for one week of work may be stored in the sub stocker 100a, and the tool T required for one day of work may be stored in the rotary magazine 80a. In this case, the delivery of the tool T between the rotary magazine 80a and the sub stocker 100a can be performed via the tool delivery mechanism 108 and the processing spindle 36. For example, the delivery is automatically completed at night when there is no work. It is good to leave.

  As shown in FIG. 9, the workpiece moving device 14 is provided on the turntable 150 that can rotate on a horizontal plane, and rotates on the horizontal plane so that the machining surface of the workpiece W faces the machining spindle 36. Three sub-rotation mechanisms 152 to be set to one, and one of the sub-rotation mechanisms 152 is a first holding position 154a facing the machining spindle 36 of the first machine tool 11a. One has a main rotation mechanism 156 that intermittently rotates the turntable 150 so as to be at a second holding position 154b facing the machining spindle 36 of the second machine tool 11b. The turntable 150 has a shape in which rectangular plates extend radially in three directions, and a separating plate 151 extending upward is provided between the rectangular plates.

  The main rotation mechanism 156 fixes the two workpieces W to the first machine tool 11a and the second machine tool 11b while intermittently rotating the turntable 150 clockwise every 120 ° in a plan view. The main rotation mechanism 156 is provided with a main angle sensor 160 that detects the angle of the turntable 150 and supplies it to the controller 12.

  Each of the three sub-rotation mechanisms 152 has a pin 158 as a holder for positioning the work W, and is arranged on the turntable 150 at equal intervals (120 °). The sub-rotation mechanism 152 rotates so that the processing surface of the workpiece W is directed backward (in the direction of arrow Z2) when the sub-rotation mechanism 152 is in the first holding position 154a and the second holding position 154b. Each sub-rotation mechanism 152 is provided with a sub-angle sensor 162 that detects the rotation angle and supplies it to the controller 12. Further, when the sub-rotation mechanism 152 is at the third holding position 154c in the arrow Z1 direction, the workpiece W can be released from the pin 158, the processed workpiece W is unloaded, and the unprocessed workpiece W is loaded.

  Next, the workpiece pressing and fixing devices 17a and 17b will be described with reference to FIG. The workpiece pressing and fixing device 17a moves the fixing plate 170 up and down in order to press and fix the workpiece W provided at the first holding position 154a of the workpiece moving device 14 from above during processing. The workpiece pressing and fixing device 17b has the same structure as the workpiece pressing and fixing device 17a, and is provided corresponding to the second holding position 154b. Hereinafter, the workpiece pressing and fixing device 17a will be described as an example.

  As shown in FIG. 10, the workpiece pressing and fixing device 17a moves the fixing plate 170 up and down to press and fix the workpiece W provided at the first holding position 154a of the workpiece moving device 14 from above during processing. is there.

  The workpiece pressing and fixing device 17a includes a fixing plate 170 that contacts and presses the upper surface of the workpiece W, a cylinder 172 that raises and lowers the fixing plate 170 with a large force for a short stroke, and a ball screw mechanism that moves the cylinder 172 up and down quickly for a long stroke 174, an upper limit switch 176 that detects the upper limit position of the fixing plate 170, a lower limit switch 178 that detects the lower limit position, and a lock mechanism 180 that fixes and releases the tube 172a of the cylinder 172.

  The ball screw mechanism 174 has a servo motor 174a, a ball screw 174b that is rotated by the servo motor 174a, and a nut portion 174c that is screwed up and down with the ball screw 174b. The nut portion 174c is a tube 172a of the cylinder 172. And are fixed. The lock mechanism 180 includes, for example, an arm 180a that rotates on a horizontal plane. When the fixed plate 170 is lowered and the lower limit switch 178 is operated, the arm 180a is rotated and moved to a position where a part of the cylinder 172 is pressed. Good.

  In the initial state, the workpiece pressing and fixing device 17a is in a state where the fixing plate 170 is raised, and the workpiece W is loaded into the first holding position 154a and / or the second holding position 154b. After the positioning, the cylinder 172 and the fixed plate 170 are lowered under the action of the ball screw mechanism 174, and the lowering is stopped by detecting that the fixed plate 170 operates the lower limit switch 178. At this time, the load applied to the servo motor 174a is about the weight of the cylinder 172 and the fixed plate 170, and high speed operation is possible with a small current.

  Next, the cylinder 172 is fixed by the lock mechanism 180 and energization of the servo motor 174a is stopped.

  Further, the fixed plate 170 is lowered under the action of the cylinder 172 to contact and press the workpiece W. At this time, since the cylinder 172 is sufficiently lowered, the stroke for lowering the fixing plate 170 is small. Moreover, the cylinder 172 is a large-diameter type, and can generate a sufficiently large force to reliably press and fix the workpiece W. Thereafter, the workpiece W is processed by the first machine tool 11a and the second machine tool 11b while being fixed by the fixing plate 170.

  After the processing is completed, the cylinder 172 is opened by operating the lock mechanism 180. Further, the cylinder 172 is raised under the action of the ball screw mechanism 174, the fixing plate 170 is raised under the action of the cylinder 172, and the rise is detected by detecting that the fixing plate 170 operates the upper limit switch 176. Let

  In such a workpiece pressing and fixing device 17a (and 17b), the fast feed of the fixing plate 170 is performed sufficiently quickly by the servo motor 174a to shorten the cycle time, and the pressing of the workpiece W is sufficiently performed by the cylinder 172. It can be pressed strongly. Since the servo motor 174a is not used to press the workpiece W, there is no risk of seizure and a small size is sufficient. Since the cylinder 172 is used with a short stroke, a short length is sufficient.

  As shown in FIG. 11, the controller 12 includes a first machine tool control unit 300 a and a second machine tool control unit 300 b that control the first machine tool 11 a and the second machine tool 11 b, and a workpiece that controls the workpiece moving device 14. A holding control unit 302, a magazine control unit 304 that controls the rotary magazines 80a and 80b, a sub stocker control unit 306 that controls the sub stockers 100a and 100b, and a press control unit 308 that controls the workpiece press fixing devices 17a and 17b. . The work holding control unit 302 includes a main rotation control unit 302 a that controls the main rotation mechanism 156 and sub rotation control units 302 b to 302 d that control the three sub rotation mechanisms 152.

  The first machine tool control unit 300a, the second machine tool control unit 300b, the work holding control unit 302, the magazine control unit 304, the sub stocker control unit 306, and the press control unit 308 are connected to each other to exchange information and perform cooperative operation. do.

  According to the first machine tool 11a configured as described above, the position X of the horizontal position of the machining spindle 36 changes depending on the direction of the rotary arm 32 under the rotational action of the arm motor 34. For example, as shown in FIG. Is expressed as X = R · cos θ with respect to an angle θ in which the horizontal direction is 0 °. The vertical position Y of the machining spindle 36 varies depending on the direction of the rotary arm 32 and the height Y0 of the support 22 and is expressed as Y = Y0 + R · sin θ. Therefore, the machining spindle 36 can be arranged at a desired position with respect to the workpiece W fixed to the turntable 150 by the operation of the rotary arm 32 and the support body 22. After the machining spindle 36 is positioned, While the machining spindle 36 is rotated by the spindle motor 38, the column 18 is advanced in the direction of the arrow Z1, thereby bringing the tool T into contact with the workpiece W, cutting such as drilling, boring and tapping, honing, etc. Can be ground.

  The first machine tool 11a has been described above as an example, but the second machine tool 11b has the same structure as the first machine tool 11a, and thus detailed description thereof is omitted.

  In the machine tool system 10 configured as described above, the workpiece W is processed as follows.

  First, the processed workpiece W at the third position of the workpiece moving device 14 is removed, and the unprocessed workpiece W is placed. At this time, the pin 158 is positioned so as to be in a specified direction.

  Next, under the action of the controller 12, the workpiece moving device 14 rotates 120 ° clockwise in plan view, and moves the unprocessed workpiece W to the first holding position 154a. At this time, the workpiece W that has been present at the first holding position 154a moves to the second holding position 154b. The workpiece W moved to the second holding position 154b has finished the first stage machining. In addition, the workpiece W that has been in the second holding position 154b so far moves to the third holding position 154c. For the workpiece W moved to the third holding position 154c, all the machining steps (two steps) in the machine tool system 10 have been completed.

  The sub-rotation mechanism 152 at the first holding position 154a and the second holding position 154b is turned so that the machining surface of each workpiece W is directed in the direction of the machining spindle 36 of the first machine tool 11a and the second machine tool 11b. It rotates with reference to the table 150.

  Further, after the upper surface of the workpiece W is pressed and fixed under the action of the workpiece pressing and fixing devices 17a and 17b, the first stage machining and the second stage machining are performed on the workpiece W by the first machine tool 11a and the second machine tool 11b. Apply.

  Thereafter, the workpiece W is released from being pressed by the workpiece pressing and fixing devices 17a and 17b, and the workpiece moving device 14 is rotated 120 ° clockwise in plan view.

  In this way, the workpiece moving device 14 can move the workpiece W by repeating simple intermittent motion. Moreover, since the 1st holding position 154a and the 2nd holding position 154b should just be arrange | positioned in the position facing the 1st machine tool 11a and the 2nd machine tool 11b, the outer diameter of the turntable 150 is the 1st machine tool. It does not protrude so much from the left and right ends of 11a and the second machine tool 11b, and can be set narrow. Furthermore, since the main rotation mechanism 156 is provided below the turntable 150, the workpiece moving device 14 can be set to be narrow.

  As described above, according to the machine tool system 10 according to the present embodiment, the turntable 150 is intermittently rotated by the main rotation mechanism 156, and the work W is set in a predetermined direction by the sub rotation mechanism 152. It is possible to improve the work transfer efficiency between machine tools with a compact configuration.

  In addition, the workpiece moving device 14 can perform positioning of the workpiece W between the first machine tool 11a and the second machine tool 11b for the conveyance and processing with a simple rotational motion, thereby shortening the cycle time. In addition, the transport procedure is simple.

  Since the columns 18 of the first machine tool 11a and the second machine tool 11b are arranged in parallel, the lateral width of the machine tool system 10 can be set narrow.

  Note that the first machine tool 11a and the second machine tool 11b do not necessarily have to be arranged in parallel adjacent to each other. For example, as shown in FIG. The direction may be set. In this case, if the first machine tool 11a and the second machine tool 11b machine the same surface with respect to the workpiece W, the machining surface of the workpiece W may be directed outward, and the auxiliary rotation mechanism 152 is not required. It becomes simple.

  Further, as shown in FIG. 14, the first machine tool 11a and the second machine tool 11b may be arranged in parallel and offset to be reversed. In this case, it is preferable that the sub stocker 100a and the sub stocker 100b are arranged inward so that the width Xd of the machine tool system 10 is narrowed.

  Further, as shown in FIG. 15, the work moving device 14 may be provided with four sub-rotating mechanisms 152 at equal intervals (90 °). In this case, the workpiece W is processed at the second holding position 320b and the third holding position 320c facing the first machine tool 11a and the second machine tool 11b, and the unprocessed workpiece W is loaded at the first holding position 320a. It is possible to carry out the processed workpiece W at the fourth holding position 320d. That is, the work W can be carried in and out at the same time, which is efficient.

  Of course, the machine tool system 10 according to the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.

It is a partial cross section perspective view of the machine tool system concerning this embodiment. It is a front view of the machine tool system concerning this embodiment. It is a side view of the machine tool system concerning this embodiment. It is a cross-sectional side view of a support body. It is a partial cross section perspective view of the processing spindle, holding arm, and unclamp block when changing tools. It is an enlarged side view of a column, a rotating magazine, and its peripheral part when changing tools. FIG. 7A is a model diagram of a mechanism in which the rotation center axis of the rotation arm and the rotation axis of the rotation magazine are arranged on the same vertical plane, and FIG. 7B shows the rotation axis of the rotation arm and the rotation axis of the rotation magazine. It is a model figure of the mechanism arrange | positioned in the position which is not on the same vertical surface. It is a model top view of a tool delivery mechanism. It is an expanded sectional perspective view of a workpiece moving device. It is a schematic block diagram of a workpiece | work press fixing device. It is a block block diagram of a controller. It is a model front view of the machine tool for showing the coordinate of a process principal axis. It is a schematic plan view of a machine tool system in which two machine tools are arranged radially. FIG. 2 is a schematic plan view of a machine tool system in which two machine tools are arranged in parallel and offset in opposite directions. It is a schematic top view of the machine tool system provided with the workpiece | work moving apparatus provided with four subrotation mechanisms.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Machine tool system 11a ... 1st machine tool 11b ... 2nd machine tool 14 ... Work movement apparatus 17a, 17b ... Work pressure fixing apparatus 18 ... Column 22 ... Supporting body 32 ... Rotating arm 36 ... Processing spindle 80a, 80b ... Rotation Magazine 84, 106 ... Holding arm 100a, 100b ... Sub stocker 108 ... Tool delivery mechanism 150 ... Turntable 152 ... Sub rotation mechanism

Claims (2)

A first machine tool and a second machine tool;
A workpiece moving device for holding a workpiece to be processed by the first machine tool and the second machine tool;
A machine tool system comprising:
The first machine tool and the second machine tool are respectively
A column that slides in the Z direction, which is one direction in the horizontal plane,
A support provided on the column and slidingly moved in a vertical direction;
A rotating arm that rotates 360 ° in a vertical plane that faces the workpiece facing the Z direction supported by the support;
An arm driving source for rotating the rotating arm;
A machining spindle which is provided at a position away from the rotation center on the rotary arm and is rotatably supported with respect to the rotary arm and oriented in the Z direction;
A spindle drive source for rotating the machining spindle;
Have
The workpiece moving device is:
A turntable rotatable on a horizontal surface,
A plurality of sub-rotation mechanisms provided on the turntable and configured to rotate on a horizontal plane and set the machining surface of the workpiece in a direction facing the machining spindle;
One of the sub-rotation mechanisms is a first holding position facing the machining spindle of the first machine tool, and the other one of the auxiliary rotation mechanisms is the machining spindle of the second machine tool. A main rotation mechanism for intermittently rotating the turntable so as to be in the second holding position facing each other;
A machine tool system comprising: The machine tool system according to claim 1,
The machine tool system, wherein the columns of the first machine tool and the second machine tool are arranged in parallel.

Images