JP4426706B2 - Workpiece placement device for spindle-driven vertical machine tools - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a workpiece placement for delivering a workpiece to a spindle-moving vertical machine tool capable of moving a spindle stock that supports a spindle having a substantially vertical rotation axis in at least two axial directions. More specifically, the present invention relates to a workpiece placement apparatus capable of performing processing such as measurement other than workpiece delivery.
[0002]
[Prior art]
A machining tool provided below the chuck by moving a spindle stock that supports a spindle having a rotation axis inclined by a predetermined angle from the vertical direction or the vertical direction, and detaching a workpiece from a chuck provided at the lower end of the spindle. The spindle-moving vertical machine tool for machining a workpiece does not require a conveyance loader for conveying the workpiece to the spindle, and has an advantage that the workpiece conveyance mechanism is simplified. In such a spindle movement type vertical machine tool, an unmachined workpiece is usually received from a workpiece placing device in a workpiece transfer area adjacent to the machining area and the movement direction of the spindle (X-axis direction), and processed. The finished workpiece was also returned to the workpiece placement device.
[0003]
[Problems to be solved by the invention]
As described above, in the spindle moving type vertical machine tool, the machining area for machining the workpiece and the workpiece transfer area for delivering the workpiece are provided adjacent to each other in the X-axis direction. In addition to this, for example, a measurement region for measuring a machining dimension or the like of a workpiece can be provided. Then, the workpiece after completion of machining is held on the chuck, the spindle is moved in the X-axis direction, and the workpiece is conveyed to the measurement area. Further, the spindle is moved in the X-axis direction and the Z-axis direction (parallel to the axis of the spindle). It is possible to measure the workpiece dimensions by moving it in the desired direction.
[0004]
In this case, if the machining area, workpiece transfer area, and measurement area are arranged side by side in the X-axis direction, the movement distance of the headstock in the X-axis direction must be increased, and the machine tool becomes a special specification. However, there arises a problem that the installation area is increased by increasing the size, or the cost of the machine tool is increased. That is, it is possible to move to each region such as a machining region, a workpiece transfer region, and a measurement region by moving the headstock in the X-axis direction, but the machine tool is increased by increasing the movement stroke in the X-axis direction of the headstock. The problem of an increase in cost and an increase in installation area arises.
[0005]
Accordingly, the present invention provides a workpiece mounting in a spindle moving type vertical machine tool capable of performing processing such as dimension measurement other than delivery of a workpiece without increasing the movement stroke of the headstock in the X-axis direction. It is an object to provide a mounting device.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a workpiece mounting apparatus in a spindle movement type vertical machine tool according to the present invention is characterized in that a headstock that rotatably supports a spindle having an axis in a substantially vertical direction is at least an axis of the spindle. A workpiece to be supplied to a spindle moving vertical machine tool that moves in a first direction that is a direction and a second direction orthogonal to the first direction is placed on the lower end of the spindle A workpiece placement device that performs at least one of an operation of receiving the workpiece from a provided chuck or an operation of transferring the workpiece to the chuck, and the workpiece placement is capable of placing the workpiece. A movement trajectory of the spindle provided in or near the workpiece transfer area, which is an area for performing the workpiece transfer operation between the mounting section and the chuck, and provided above the workpiece mounting section. First position on A movable table movable to a second position separated by a predetermined amount from the first position, and a workpiece processing unit provided on the movable table for performing an operation other than a delivery operation on the workpiece; A moving table driving unit that moves the moving table; and when the moving table is moved to the second position, the workpiece is transferred between the chuck and the workpiece placing unit. And a control unit that controls the workpiece to perform an operation other than the delivery operation when the movable table is moved to the first position.
[0007]
Further, in the workpiece placing device in the above-mentioned spindle movement type vertical machine tool, the operations other than the delivery operation to the workpiece are the measurement of the workpiece, the inversion of the workpiece, the pressing of the workpiece, the work Marking the object or of the workpiece Defective product sorting It is preferable that any one of the operations is performed.
[0008]
In the workpiece placing device in the spindle moving vertical machine tool, the workpiece processing unit is at least one measuring unit that measures the workpiece, and the control unit includes the moving table. It is preferable that the workpiece is measured by the measuring unit when moving to the first position.
[0009]
Further, in the workpiece placing device in the spindle movement type vertical machine tool of the present invention, the spindle head that rotatably supports the spindle having an axis in a substantially vertical direction is at least the axis direction of the spindle. And a workpiece to be supplied to a spindle-moving vertical machine tool that moves in a direction and a second direction orthogonal to the first direction, and from a chuck provided at a lower end of the spindle A workpiece placement device that performs at least one of an operation of receiving a workpiece or an operation of transferring the workpiece to the chuck, wherein the first position on a movement trajectory of the spindle, and the first A mounting table that is movable to a second position that is a predetermined distance away from the position and on which the workpiece can be mounted, a mounting table driving unit that moves the mounting table, and a mounting table at the first position The workpiece is provided below A workpiece processing unit for performing operations other than the delivery operation, and the workpiece delivery operation between the chuck and the placement table when the placement table is moved to the first position. And a control unit that controls the workpiece processing unit to perform an operation other than the delivery operation with respect to the workpiece when the mounting table is moved to the second position. It is.
[0010]
Further, in the workpiece placing device in the above-mentioned spindle movement type vertical machine tool, the operations other than the delivery operation to the workpiece are the measurement of the workpiece, the inversion of the workpiece, the pressing of the workpiece, the work Marking the object or of the workpiece Defective product sorting It is preferable that any one of the operations is performed.
[0011]
Further, in the workpiece placing device in the spindle moving vertical machine tool, the workpiece processing unit is at least one measuring unit that measures the workpiece, and the control unit includes the mounting table. It is preferable that the workpiece is measured by the measuring unit when moving to the second position.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a spindle moving vertical machine tool 1 and a workpiece placing device 3 of the present invention provided in the vicinity thereof. This is an example of a vertical lathe as a machine tool. FIG. 2 is a plan view of the spindle movement type vertical machine tool 1 and the workpiece placing device 3. A tool post 23 is provided on the bed 10 of the spindle moving type vertical machine tool 1. The tool post 23 is provided with a turret 21 which can be indexed and rotated, and a processing tool 22 such as an outer diameter processing tool and an inner diameter processing tool is held on the outer peripheral portion of the turret 21.
[0013]
An X-axis guide rail 11 is provided at a position above the tool post 23 and the turret 21 along an X-axis direction (horizontal direction) orthogonal to a direction parallel to the axial direction of the main shaft 5 (Z-axis direction). A column 12 is provided on the X-axis guide rail 11 so as to be movable in the X-axis direction via a slide body (not shown). The X-axis guide rail 11 and the slide body constitute a linear motion rolling guide. The column 12 is moved in the X-axis direction by an X-axis feed screw 13 that is rotationally driven by the X-axis servomotor 20 and a nut 14 that is screwed into the X-axis feed screw 13 and fixed to the column 12.
[0014]
The column 12 is provided with a Z-axis guide rail 24 in the vertical Z-axis direction. A headstock 4 is provided so as to be movable in the Z-axis direction by a Z-axis guide rail 24 constituting a linear motion rolling guide and a slide body 25, and a Z-axis feed screw (not shown) is attached by a Z-axis servomotor 26. The headstock 4 is moved in the Z-axis direction by being rotationally driven. A main shaft 5 having a rotation axis in the vertical direction is rotatably supported on the main shaft 4, and a chuck 6 is provided at the lower end of the main shaft 5. The chuck 6 opens and closes the gripping claw 27 through a draw tube (not shown) by driving a chuck cylinder 28 provided at the upper end of the main shaft 5 and can grip a workpiece. is there.
[0015]
The headstock 4 that rotatably supports the main shaft 5 is movable in the X and Z axis directions. While the spindle 5 supported on the spindle head 4 is rotationally driven, the NC device 50 (see FIG. 3) controls the movement in the X and Z axis directions, and the workpiece gripped by the chuck 6 is moved by the machining tool 22 on the turret 21. Process. The rotation of the main shaft 5 is performed by a built-in motor incorporated between the main shaft 4 and the main shaft 5.
[0016]
A region where the head stock 4 moves during processing is covered with a splash guard 9 as a processing region 17. A workpiece transfer area 18 is provided adjacent to the machining area 17. The machining area 17 and the workpiece transfer area 18 are partitioned by an openable / closable cover 91. The opening / closing cover 91 may be an opening / closing cover that provides a space in which the headstock 4 can move to the partition cover of the splash guard 9 and shields the space only when the headstock 4 moves to the machining region 17 side. A workpiece placement device 3 for supplying the workpiece 7 to the spindle moving vertical machine tool 1 is installed in the workpiece transfer area 18. With this workpiece mounting device 3, a plurality of workpieces 7 can be continuously supplied to the spindle movement type vertical machine tool 1.
[0017]
A plurality of pallets 31 are connected to a chain (not shown) on the upper surface of the workpiece placing device 3 so as to be connected in a closed curve. A plurality of casters 31 a are provided below the pallet 31. The chain to which the pallet 31 is connected is driven counterclockwise in FIG. 2 by the sprockets 32, 32, and accordingly, each pallet 31 also turns in the direction of the arrow. A workpiece 7 can be placed on each of the plurality of pallets 31 on the workpiece placing device 3. Each pallet 31 is disposed so as to be positioned at the supply position A and the processed placement position B immediately below the movement locus S in the X-axis direction of the central axis of the main shaft 5.
[0018]
In this way, the workpiece mounting device 3 is installed in the workpiece transfer area 18 in the vicinity of the spindle moving vertical machine tool 1. The X-axis guide rail 11 of the spindle-moving vertical machine tool 1 extends to the position of the workpiece mounting device 3 in the X-axis direction, and the workpiece at the supply position A, which is a position where the workpiece is supplied to the chuck 6. The headstock 4 can be moved to a position located immediately above 7. When the chuck 6 comes directly above the supply position A, the spindle 5 can be moved up and down to hold the workpiece 7 at the supply position A on the chuck 6.
[0019]
When a certain pallet 31 is positioned at the supply position A, another pallet 31 (one pitch forward pallet) is positioned at the processed placement position B at the same time. When the machining of the workpiece 7 held on the chuck 6 is completed, the spindle 5 is moved to a position immediately above the machined mounting position B, and then the spindle 5 is moved up and down to hold the machined machine held on the chuck 6. The object is placed on the pallet at the processed placement position B.
[0020]
While holding the unmachined workpiece at the supply position A on the chuck 6 and finishing the machining and moving the spindle 5 to the workpiece transfer area 18 again, the pallet 31 is turned by one pitch, The pallet 31 that has been at the supply position A when the processed workpiece is supplied is moved and positioned to the processed placement position B in an empty state (a workpiece not mounted state). Then, a pallet on which a new unprocessed workpiece is placed is positioned at the supply position A. When the machined workpiece is placed on the pallet 31 at the machined placement position B, the spindle 5 is then moved immediately above the supply position A, and the spindle 5 is moved up and down to chuck a new unmachined workpiece. 6 to hold.
[0021]
A moving table 33 is movably provided above the group of pallets 31, and a first measuring unit 34 and a second measuring unit 35 are provided on the upper surface of the moving table 33. The movable table 33 is movable to a measurement position for measuring the dimensions of the workpiece and a retreat position other than during measurement. A support table 37 is provided on the upper surface of the workpiece mounting device 3, and a moving table 33 is provided on the support table 37 so as to be movable by a guide portion 36 a. As the guide portion 36a, a guide portion such as a linear motion rolling guide, a rolling guide, or a sliding guide can be used. The moving direction of the moving table 33 is a direction (Y-axis direction) orthogonal to both the X-axis and Z-axis directions, and is moved and driven by the moving table driving unit 36. A rodless cylinder, cylinder, motor and screw mechanism, motor and rack / pinion mechanism, linear motor, or the like can be used as the moving table drive unit 36.
[0022]
The position of the moving table 33 shown by a solid line in FIG. 2 is a retracted position. Further, the position of the moving table 33 indicated by a two-dot chain line is a measurement position. When the moving table 33 is at the measurement position, the first measurement unit 34 and the second measurement unit 35 are positioned immediately below the movement locus S of the central axis of the main shaft 5. The dimensions of the workpiece held on the chuck 6 can be measured by the first measurement unit 34 and the second measurement unit 35. At the time of measurement, the spindle 5 is moved in the X and Z axis directions to measure a predetermined part of the workpiece.
[0023]
As the 1st measurement part 34 and the 2nd measurement part 35, an internal diameter measurement part, an outer diameter measurement part, a surface property measurement part, etc. can be installed. As a detector for performing measurement, an electric micrometer, an air micrometer, a digital scale, a touch sensor, or the like can be used. In addition, when a touch sensor is used for the first measurement unit 34 and the second measurement unit 35, the measurement value of each part can be obtained from the position data of the main shaft 5 at the time of touch signal output. Measurement of one or a plurality of predetermined parts such as an outer dimension and an axial dimension can be performed.
[0024]
Further, when the movable table 33 is in the retracted position, as described above, the processed workpiece held by the chuck 6 at the tip of the spindle 5 is placed on the pallet 31 at the processed placement position B, The unprocessed workpiece on the pallet 31 at the supply position A can be supplied to the chuck 6. As a matter of course, the movable table 33, the first measuring unit 34, the second measuring unit 35, the support table 37 and the like are the pallet 31 on which the workpiece is placed and the movable units of the spindle moving vertical machine tool 1. It is arranged so as not to interfere with.
[0025]
Thus, in the workpiece mounting apparatus 3, the pallet 31 for transferring and receiving the workpiece and the movable table 33 including the first measuring unit 34 and the second measuring unit 35 are arranged in two stages in the vertical direction. Since they are arranged so as to overlap, processing such as dimension measurement other than delivery of the workpiece can be performed without increasing the movement stroke of the headstock 4 in the X-axis direction. The spindle movement type vertical machine tool 1 and the workpiece placing device 3 described above are controlled by the NC device 50.
[0026]
FIG. 3 is a block diagram showing the configuration of the NC device 50 and each control motor. As the NC device 50, a so-called personal computer having a numerical control function and a personal computer function by installing an NC board for performing servo motor control, sequence control, etc. in an expansion slot of an NC dedicated machine or a personal small computer (personal computer). NC device can be used. The NC device 50 is provided with a CPU 51 as information processing means for performing various data processing, and a ROM 55 and a RAM 56 are connected to the CPU 51 as a main storage device via a bus 52.
[0027]
The CPU 51 operates in accordance with the system program and data stored in the ROM 55 and the program and data loaded into the RAM 56 (read into the memory). As the programs loaded in the RAM 56 in this manner, an OS (operating system) that is a basic program, a machine tool control program 561 for controlling each part of the spindle movement type vertical machine tool 1, a workpiece placing device 3, a workpiece placement device control program 562 for controlling each part of the workpiece 3, a workpiece delivery program 563 for delivering the workpiece between the chuck 6 and the pallet 31, and each part of the workpiece held on the chuck 6. A workpiece measurement program 564 for measuring the dimensions of the machine, an NC command processing program for performing processing according to each NC command of a number of NC commands, a display control program for displaying characters and figures on the display means 53, etc. There is.
[0028]
Further, an NC machining program memory 57 is connected to the CPU 51 via a bus 52. In the NC machining program memory 57, the workpiece is released from the chuck 6, the workpiece is held by the chuck 6, the spindle is rotated, and the tool post 23 and the spindle base 4 are relatively moved relative to the X and Z axes. An NC machining program for machining the workpiece by controlling movement in the direction is stored.
[0029]
Input / output devices are connected to the CPU 51 via the bus 52. As input / output devices, display means 53 for displaying characters and graphics and input means 54 for an operator to input data are connected to the bus 52 via an interface circuit. As the display means 53, a CRT, an EL display board, a liquid crystal display board, or the like can be used. As the input means 54, a keyboard, a touch panel combined with the display means 53, or the like can be used.
[0030]
Further, a fixed disk device as an auxiliary storage device may be connected to the CPU 51 via the bus 52. In this case, various programs to be executed by the CPU 51 are stored in the fixed disk device, and these programs and the like may be loaded from the fixed disk device to the RAM 56 and the NC machining program memory 57 as appropriate.
[0031]
The NC device 50 is connected to a spindle motor 41 that rotationally drives the spindle 5 of the spindle moving vertical machine tool 1 via a C-axis / spindle control unit 411 and an amplifier 412. The rotational speed of the spindle motor 41 is fed back to the amplifier 412 via the detector 413, and a predetermined rotational speed is maintained. The angular position of the main shaft 5 around the C axis is fed back from the detector 413 to the amplifier 412 and the C axis / main shaft control unit 411, and the speed and position of the main shaft 5 are controlled in the C axis direction to position it at a desired angular position. It is possible.
[0032]
Similarly, the NC device 50 is connected to the X-axis servomotor 20 of the spindle moving type vertical machine tool 1 via the X-axis positioning control unit 201 and the amplifier 202, and the X-axis between the workpiece and the tool rest 23. Control the relative movement of directions. The rotational speed and rotational angle of the X-axis servomotor 20 are fed back to the amplifier 202 and the X-axis positioning control unit 201 via the detector 203, and the speed and position in the X-axis direction of the relative movement between the workpiece and the tool rest 23. Used for control. The functions of the Z-axis servomotor 26, the Z-axis positioning control unit 261, the amplifier 262, and the detector 263 are the same as those for the X-axis, and control the relative movement of the workpiece and the tool rest 23 in the Z-axis direction.
[0033]
Further, a PLC (programmable logic controller) 58 is connected to the NC device 50, and the turret index control unit 212, the chuck cylinder control unit 281, the pallet movement control unit 312, and the moving table control are connected via the PLC 58. The part 361 is connected. The turret index driving unit 211, the chuck cylinder 28, the pallet movement driving unit 311 and the moving table driving unit 36 are controlled by the NC device 50 and the respective control units. Here, the turret index driving unit 211 is a driving unit that performs indexing driving of the turret 21, the chuck cylinder 28 performs opening / closing driving of the gripping claws 27 of the chuck 6, and the pallet movement driving unit 311 The pallet 31 group is a drive unit for controlling the turning and positioning of the pallet 31 group, and the moving table driving unit 36 is a driving unit for moving the moving table 33 to the retracted position and the measurement position.
[0034]
Further, a first measuring unit 34 and a second measuring unit 35 are connected to the NC device 50 via an interface circuit 34a. In the NC device 50, based on the data sent from the first measuring unit 34 and the second measuring unit 35, the pass / fail judgment of the non-defective product or the defective product is performed, the tool correction data in the tool correction memory 59 is corrected, and the like. Can do.
[0035]
FIG. 4 is a flowchart showing an outline of control of the spindle movement type vertical machine tool 1 and the workpiece placing device 3 by the NC device 50. Consider the state in which the spindle moving type vertical machine tool 1 is activated and the workpiece is not held on the chuck 6 of the spindle 5. First, in step 501, the spindle 5 is moved to a position immediately above the supply position A in the workpiece transfer area 18. At the same time, in step 502, the pallet 31 on which the unprocessed workpiece is placed is positioned at the supply position A. The procedures 501 and 502 may be reversed in order or executed simultaneously.
[0036]
Next, in step 503, the unprocessed workpiece is held on the chuck 6 by moving the spindle 5 up and down and opening and closing the chuck 6. In step 504, the spindle 5 is moved to the machining area 17, and the workpiece is machined in step 505. When machining is completed, the spindle 5 is moved again to the workpiece transfer area 18 in step 506. At the same time, in step 507, the pallet 31 on which a new unprocessed workpiece is placed is positioned at the supply position A, and the empty pallet 31 is positioned in the processed placement position B. In step 508, the movable table 33 is moved to the measurement position. Position to. Note that these steps 506 to 508 may be changed in any order or may be executed simultaneously.
[0037]
Next, in step 509, the first measuring unit 34 and the second measuring unit 35 on the moving table 33 measure the dimensions and the like of a predetermined processing part of the processed workpiece held on the chuck 6. At the time of measurement, the spindle 5 is moved in the X and Z axis directions to measure a predetermined part of the workpiece. When the measurement is completed, the moving table 33 is retracted to the retracted position in step 510. Next, in step 511, the processed workpiece held by the chuck 6 at the tip of the spindle 5 is placed on the empty pallet 31 at the processed placement position B.
[0038]
Then, in step 512, it is determined whether or not all the workpieces have been processed. If not, the process returns to step 503, the next unprocessed workpiece is held on the chuck 6, and steps 503 to 512 are performed. To repeat the workpiece automatically. If it is determined in step 512 that the machining of all workpieces has been completed, the spindle 5 is automatically returned to the machining area 17 and the above control procedure is terminated. By performing control as described above, it is possible to automatically and continuously process and measure a plurality of workpieces.
[0039]
Next, a second embodiment of the present invention will be described. FIG. 5 is a plan view showing the workpiece placing device 8 according to the second embodiment, and FIG. 6 is a front view of the main part of the workpiece placing device 8. A support table 84 is provided on the upper surface of the workpiece mounting device 8, and a moving table 81 is provided so as to be movable on the support table 84 by a guide unit 85. As the guide portion 85, a guide portion such as a linear motion rolling guide, a rolling guide, or a sliding guide can be used. The moving direction of the moving table 81 is the Y-axis direction, and the moving table 81 is driven to move by the moving table driving unit 86. A rodless cylinder, cylinder, motor and screw mechanism, motor and rack / pinion mechanism, linear motor, or the like can be used as the moving table drive unit 86.
[0040]
On the moving table 81, two mounting tables 82a and 82b are provided. An unprocessed workpiece or a processed workpiece can be mounted on the mounting tables 82a and 82b. The workpieces 7 and 71 are indicated by a two-dot chain line in FIG. The mounting tables 82 a and 82 b are provided so as to be movable up and down by a predetermined amount with respect to the moving table 81, and are supported by the moving table 81 while being biased upward by a coil spring 83. Further, since the mounting tables 82a and 82b are supported at three points, the upper surfaces of the mounting tables 82a and 82b can be inclined by a predetermined angle from the horizontal state.
[0041]
When holding the workpiece on the chuck 6 at the lower end of the main shaft 5, if the main shaft 5 is lowered to a position where the coil spring 83 is compressed by a predetermined amount, the work is pressed against the gripping claws 27 of the chuck 6 with a predetermined pressure. The inclinations of the mounting tables 82a and 82b are automatically determined so that the object uniformly contacts the gripping claws 27. By holding the workpiece on the chuck 6 in a state where the workpiece is in uniform contact with the gripping claws 27, the holding accuracy of the workpiece is improved. As described above, the mounting tables 82a and 82b have both a function as a table for mounting a workpiece and a function as a workpiece pressing means for uniformly pressing the workpiece against the gripping claws 27 of the chuck 6. Yes.
[0042]
The movable table 81 has a workpiece transfer position for transferring the workpiece to and from the spindle movement type vertical machine tool 1, and a loading / unloading position for loading and unloading the workpiece by an operator and a robot, respectively. It is possible to move and position. In FIG. 5, the position of the moving table 81 indicated by the two-dot chain line is the workpiece transfer position, and the position of the moving table 81 indicated by the solid line is the loading / unloading position.
[0043]
When the moving table 81 is at the workpiece transfer position, the center of each of the mounting tables 82a and 82b is a position immediately below the movement locus S of the central axis of the main shaft 5. At this time, the spindle 5 is moved in the X and Z-axis directions to supply unprocessed workpieces from the mounting tables 82a and 82b to the chuck 6, or to mount processed workpieces from the chuck 6 to the mounting tables 82a and 82b. It is possible to do. In the second embodiment, the mounting table 82a may be a mounting table for mounting an unmachined workpiece, and the mounting table 82b may be a mounting table for mounting a processed workpiece, or an unprocessed workpiece is supplied. The position where the processed workpiece is placed and the position where the processed workpiece is placed may be the same position. That is, the workpiece supplied from the mounting table 82a may be returned to the mounting table 82a at the same position, and the workpiece supplied from the mounting table 82b may be returned to the mounting table 82b at the same position.
[0044]
The loading / unloading position of the movable table 81 is set to a position where the mounting tables 82 a and 82 b protrude outside the splash guard 9. When the movable table 81 is in the loading / unloading position, an operator or a robot can unload the processed workpiece on the mounting tables 82a and 82b from the mounting tables 82a and 82b or load an unprocessed workpiece. It can be mounted on the mounting tables 82a and 82b.
[0045]
A measuring unit 87 for measuring the workpiece held on the chuck 6 is provided at a position immediately below the movement locus S on the upper surface of the workpiece placing device 8. The measuring unit 87 is provided at a position below the moving table 81 at the workpiece transfer position. Therefore, when the moving table 81 is at the workpiece transfer position, only the workpiece can be transferred and the workpiece cannot be measured, but the moving table 81 is moved from the workpiece transfer position to the loading / unloading position. Then, the workpiece can be measured by the measuring unit 87. When measuring the workpiece, the moving table 81 does not necessarily have to be moved to the loading / unloading position, and may be moved to a standby position set between the workpiece transfer position and the loading / unloading position.
[0046]
At the time of measuring the workpiece, as in the first embodiment described above, the spindle 5 is moved in the X and Z axis directions to measure a predetermined part of the workpiece. As the measurement unit 87, an inner diameter measurement unit, an outer diameter measurement unit, a surface property measurement unit, and the like can be installed. As a detector for performing measurement, an electric micrometer, an air micrometer, a digital scale, a touch sensor, or the like can be used. If a touch sensor is used for the measuring unit 87, the measured value of each part can be obtained from the position data of the spindle 5 when the touch signal is output, so one or a plurality of inner diameter dimensions, outer dimensions, axial dimensions, etc. It is possible to perform measurement of a predetermined part.
[0047]
The control of the spindle movement type vertical machine tool 1 and the workpiece placing device 8 in the second embodiment is the same control device as the NC device 50 of FIG. 3 in the first embodiment, and It can be performed by a control procedure similar to the control procedure of FIG. As described above, also in the second embodiment, it is possible to automatically and continuously process and measure a plurality of workpieces. And since the mounting table and the measuring unit for transferring the workpiece are arranged so as to overlap in two stages in the vertical direction, the workpiece table other than the delivery of the workpiece can be obtained without increasing the movement stroke of the spindle table in the X-axis direction. Processing such as dimension measurement can be performed.
[0048]
Furthermore, in the second embodiment, the mounting tables 82a and 82b for mounting the workpiece are provided on the upper side so as to be movable, and the measuring unit 87 is provided on the lower side, so that the mounting table 82a is used as the moving mechanism. , 82b can be used to switch between other operations such as workpiece transfer operation and dimension measurement only by the moving mechanism of the moving table 81. Thus, in the second embodiment, the number of moving mechanisms can be reduced, and the cost of the machine tool can be reduced.
[0049]
In the first and second embodiments described above, as an operation other than the delivery of the workpiece of the workpiece processing unit, the measurement of the dimension of the machining part of the workpiece has been described as an example. Operations such as reversing the workpiece, pressing the workpiece, marking the workpiece, and loading the workpiece may be performed. Here, the reversal of the workpiece is performed by first holding one end of the workpiece on the chuck, and then turning the workpiece upside down by the reversing device, so that the other end of the workpiece is moved. This operation is performed when processing is performed while being held by the chuck. The pressing of the workpiece is, for example, an operation performed to press the workpiece uniformly against the gripping claws of the chuck.
[0050]
Marking a workpiece is an operation of giving a mark that can identify a defective product to the workpiece when measuring the processed workpiece and determining a defective product. In addition, marking on a workpiece may be performed by giving a mark capable of identifying it to a non-defective product, or by providing a mark capable of identifying good or bad to both a non-defective product and a defective product. Good. The loading of a workpiece is an operation of selecting a workpiece that has been determined to be defective and loading it into a defective shooter. Such means for performing various operations other than delivery of the workpiece can be installed in place of the first measurement unit 34 or the second measurement unit 35 in the first embodiment, or the second It can replace with the measurement part 87 in embodiment, and can install.
[0051]
In the above embodiment, the axial direction (Z-axis direction) of the main shaft 5 is a vertical direction, but a machine tool in which the Z-axis direction is inclined by a predetermined angle from the vertical direction may be used. Further, although a vertical lathe has been described as an example of a machine tool, the present invention can be applied to any other machine tool such as a turning center, a grinding machine, or a machining center in addition to the vertical lathe. Moreover, although it demonstrated that the workpiece mounting apparatus was also controlled by NC apparatus which controls a spindle movement type | mold vertical machine tool, you may make it provide a dedicated control apparatus in a workpiece mounting apparatus. Further, the NC device has been described as determining whether a workpiece is acceptable or defective. However, a measurement control unit is provided in the measurement unit, and the measurement control unit performs pass / fail determination, correction presence / absence determination, and the like. The result may be sent to the NC device.
[0052]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0053]
Since the movable table provided with the workpiece processing unit is provided movably above the workpiece mounting unit, in addition to the transfer of the workpiece without increasing the movement stroke in the X-axis direction of the spindle table, Processing such as dimension measurement other than the delivery of the workpiece can be performed, and processing such as machining and measurement of a plurality of workpieces can be performed automatically and continuously.
[0054]
Since the mounting table for mounting the workpiece is movably provided above the workpiece processing section, the workpiece can be transferred in addition to the transfer of the workpiece without increasing the movement stroke of the spindle table in the X-axis direction. It is possible to perform processing such as dimension measurement other than delivery of the workpiece, and processing such as machining and measurement of a plurality of workpieces can be performed automatically and continuously. Furthermore, the number of moving mechanisms can be reduced, and the cost of the machine tool can be reduced.
[0055]
Operations other than the transfer operation to the workpiece can be various operations such as workpiece measurement, workpiece inversion, workpiece pressing, workpiece marking, or workpiece loading. Various automations of the spindle movement type vertical machine tool can be performed without increasing the movement stroke of the table in the X-axis direction.
[0056]
When the workpiece measurement is an operation other than the delivery operation to the workpiece, machining and measurement of the workpiece by the spindle moving type vertical machine tool is performed without increasing the movement stroke of the headstock in the X-axis direction. It can be done automatically and continuously. For this reason, the processing and quality control of the product can be automated and executed with high efficiency.
[Brief description of the drawings]
FIG. 1 is a front view of a spindle movement type vertical machine tool and a workpiece mounting device of the present invention.
FIG. 2 is a plan view of a spindle movement type vertical machine tool and a workpiece mounting device.
FIG. 3 is a block diagram illustrating a configuration of an NC apparatus.
FIG. 4 is a flowchart showing an outline of control by the NC apparatus.
FIG. 5 is a plan view of a workpiece mounting device according to a second embodiment.
FIG. 6 is a front view of a main part of a workpiece mounting device according to a second embodiment.
[Explanation of symbols]
1 ... Spindle-moving vertical machine tool
3 ... Workpiece mounting device
4 ... headstock
5 ... Spindle
6 ... Chuck
7, 71 ... Workpiece
8 ... Workpiece placing device
9 ... Splash guard
10 ... Bed
11 ... X-axis guide rail
12 ... Column
13 ... X-axis feed screw
14 ... Nut
17 ... Machining area
18 ... Work transfer area
20 ... Servo motor for X axis
21 ... Turret
22 ... Machining tools
23 ... Tool post
24 ... Z-axis guide rail
25 ... Slide body
26 ... Servo motor for Z axis
27 ... gripping claws
28 ... Chuck cylinder
31 ... pallet
32 ... Sprocket
33 ... Moving table
34 ... 1st measurement part
35. Second measuring unit
36. Moving table drive unit
37 ... Support stand
41 ... Spindle motor
50 ... NC device
81 ... Moving table
82a, 82b ... mounting table
83 ... Coil spring
84 ... Support stand
85 ... Information
86 ... Moving table drive unit
87 ... Measurement unit
91 ... Opening / closing cover

Claims (6)

A headstock (4) that rotatably supports a main shaft (5) having an axis in a substantially vertical direction is at least a first direction that is an axial direction of the main shaft (5), and is orthogonal to the first direction. The workpiece (7) to be supplied to the spindle moving vertical machine tool (1) moving in the second direction is placed and the chuck (6) provided at the lower end of the spindle (5) is mounted. A workpiece mounting device that performs at least one of an operation of receiving the workpiece (7) or an operation of transferring the workpiece (7) to the chuck,
A workpiece placement section (31) on which the workpiece (7) can be placed;
In the workpiece transfer area (18), which is an area where the workpiece (7) is transferred to and from the chuck (6), or in the vicinity thereof, above the workpiece mounting portion (31). A first stage on the movement locus (S) of the spindle (5), and a movable table (33) movable to a second position separated from the first position by a predetermined amount;
A workpiece processing unit (34, 35) provided on the moving table (33) for performing operations other than the delivery operation on the workpiece (7);
A moving table drive unit (36) for moving the moving table (33);
When the movable table (33) is moved to the second position, the workpiece (7) is transferred between the chuck (6) and the workpiece mounting portion (31). And a control unit (50) for controlling the workpiece (7) to perform an operation other than the delivery operation when the movable table (33) is moved to the first position. Workpiece placement device for spindle-driven vertical machine tools. A workpiece placing device in a spindle movement type vertical machine tool according to claim 1,
The operations other than the delivery operation to the workpiece (7) include the measurement of the workpiece (7), the inversion of the workpiece (7), the pressing of the workpiece (7), and the mark on the workpiece (7). A workpiece placement device in a spindle movement type vertical machine tool, which is either an attachment or a defective product sorting operation of the workpiece (7). A workpiece placing device in a spindle movement type vertical machine tool according to claim 2,
The workpiece processing unit is at least one measuring unit (34, 35) for measuring the workpiece (7),
The control unit (50) measures the workpiece (7) by the measurement unit (34, 35) when the movable table (33) is moved to the first position. Workpiece placement device for spindle-driven vertical machine tools. A headstock (4) that rotatably supports a main shaft (5) having an axis in a substantially vertical direction is at least a first direction that is an axial direction of the main shaft (5), and is orthogonal to the first direction. The workpieces (7, 71) to be supplied to the spindle movement type vertical machine tool moving in the second direction are placed, and the chuck (6) provided at the lower end of the spindle (5) A workpiece mounting device that performs at least one of an operation of receiving a workpiece (7, 71) or an operation of transferring the workpiece (7, 71) to the chuck (6),
The workpiece (7, 71) can be moved to a first position on the movement locus (S) of the spindle (5) and a second position separated from the first position by a predetermined amount. A mounting table (82a, 82b) that can be mounted;
A mounting table drive unit (86) for moving the mounting tables (82a, 82b),
A workpiece processing unit (87) provided below the mounting table at the first position, for performing operations other than the delivery operation on the workpieces (7, 71);
When the mounting table (82a, 82b) is moved to the first position, the workpiece (7, 71) is transferred between the chuck (6) and the mounting table (82a, 82b). While performing the operation, when the mounting table (82a, 82b) is moved to the second position, the workpiece processing unit (87) performs a non-delivery operation on the workpiece (7, 71). A workpiece placing device in a spindle movement type vertical machine tool having a control unit that performs control to perform the above operation. A workpiece placing device in a spindle movement type vertical machine tool according to claim 4,
The operations other than the delivery operation to the workpiece (7, 71) are the measurement of the workpiece, the inversion of the workpiece, the pressing of the workpiece, the marking on the workpiece, or the defective product. A workpiece placing device in a spindle-moving vertical machine tool, which is one of the operations of sorting . A workpiece placing device in a spindle movement type vertical machine tool according to claim 5,
The workpiece processing unit is at least one measuring unit (87) for measuring the workpiece (7, 71),
The control unit measures the workpiece (7, 71) by the measuring unit (87) when the mounting table (82a, 82b) is moved to the second position. Workpiece placement device for mobile vertical machine tools.

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