JP6130500B2 - Work processing system - Google Patents

Description

  The present invention relates to a workpiece machining system that performs predetermined machining on a workpiece.

  Patent Document 1 discloses a laser processing apparatus. As shown in [FIG. 1] of the document, the workpieces are conveyed in the order of carry-in stocker → laser processing machine → carry-out stocker. Patent Document 2 discloses a sample polishing apparatus. As shown in FIG. 2 of the same document, samples are conveyed in the order of supply side stocker → two polishing machines → recovery side stocker. As described above, Patent Documents 1 and 2 disclose an apparatus in which a workpiece (sample) is conveyed in one way during processing.

  Similarly, when machining a workpiece at the machining center, the workpiece is conveyed in one way. That is, the unprocessed workpiece is supplied from the supply stocker to the machining center via the workpiece transfer robot. On the other hand, the processed workpiece is discharged from the machining center to the discharge stocker via the workpiece transfer robot. In this way, the workpiece is transferred by the workpiece transfer robot in the order of supply stocker → machining center → discharge stocker.

JP 2012-232313 A Japanese Patent Laid-Open No. 10-217116

  When the machining center is operated unattended, the workpiece set in the supply stocker is automatically conveyed to the machining center, processed in the machining center, and discharged to the discharge stocker. For this reason, the number of workpieces during unattended operation is limited to the number of workpieces set in the supply stocker. Therefore, machining of the unprocessed workpiece set during unattended operation is completed, the workpiece is set again in the supply stocker, the processed workpiece is taken out from the discharge stocker, and the machining center is restarted. Production will stop. Therefore, when the number of workpieces that can be set in the supply stocker is small, the downtime becomes long.

  Then, an object of this invention is to provide the workpiece processing system which can increase the number of sets of an unprocessed workpiece | work.

  (1) In order to solve the above-described problem, a workpiece machining system according to the present invention is arranged at least one machine tool for performing predetermined machining on a workpiece and a position sandwiching the machine tool, and before machining the workpiece, And a plurality of work stockers that hold the unprocessed work, and a work transfer device that can transfer the work between the work stocker and the machine tool.

  According to the workpiece machining system of the present invention, a plurality of workpiece stockers can be used for supplying unmachined workpieces. For this reason, the number of sets of unprocessed workpieces can be increased as compared with a case where an unprocessed workpiece is fully set in a single workpiece stocker. Therefore, the number of workpieces produced (the number of machining) can be increased as compared with the case where only a single workpiece stocker is used for supplying unmachined workpieces. Therefore, the productivity of the workpiece is unlikely to decrease.

  (2) Preferably, in the configuration of the above (1), the plurality of workpiece stockers are preferably configured to hold the processed workpieces after the workpieces are processed. According to this configuration, a plurality of workpiece stockers can be used for discharging processed workpieces. For this reason, compared with the case where the processed workpiece is fully set in a single workpiece stocker, the number of processed workpiece sets can be increased. Therefore, it is possible to increase the number of workpieces produced (the number of machining) as compared with the case where only a single workpiece stocker is used for discharging a machined workpiece. Therefore, the productivity of the workpiece is unlikely to decrease.

  (3) Preferably, in the configuration of (1) or (2), the work stocker has a plurality of work placement units, and the work placement unit is capable of placing at least one work, It is better to have a configuration in which the workpiece is not arranged in at least one of the workpiece placement portions before the workpiece is processed. According to this structure, a workpiece | work can be transferred from the workpiece | work arrangement | positioning part in workpiece | work arrangement | positioning to an empty workpiece | work arrangement | positioning part with the process of a workpiece | work.

  (4) Preferably, in any one of the configurations (1) to (3), the mode can be switched between the normal mode and the automatic mode, and a plurality of the workpieces are processed before the workpiece is processed in the normal mode. Among the stockers, the work stocker on one side with respect to the machine tool holds the unprocessed work, and the work stocker on the other direction side with respect to the machine tool holds the unprocessed work. Instead, before machining the workpiece in the automatic mode, the plurality of workpiece stockers are preferably configured to hold the workpiece that has not been machined.

  Here, the “normal mode” refers to a mode that is executed during, for example, a manned operation that can replenish an unprocessed workpiece. The normal mode is executed, for example, during a worker's working hours or working hours.

  In addition, the “automatic mode” refers to a mode that is executed, for example, during unattended operation where an unprocessed workpiece cannot be replenished. The automatic mode is executed, for example, outside the worker's working hours or during breaks.

  According to this configuration, in the normal mode, the workpiece can be transported in one-way in the order of upstream work stocker → machine tool → downstream work stocker. On the other hand, in the automatic mode, the conveyance direction of the workpiece is not limited. For this reason, a plurality of workpiece stockers can be used for supplying unprocessed workpieces. Therefore, the number of sets of unprocessed workpieces can be increased as compared to a case where an unprocessed workpiece is fully set in a single workpiece stocker. That is, the number of workpieces produced (the number of machining) can be increased as compared with the case where only a single workpiece stocker is used for supplying unmachined workpieces in the automatic mode. Therefore, the productivity of the workpiece in the automatic mode is unlikely to decrease.

  According to the present invention, it is possible to provide a workpiece machining system that can increase the number of sets of unmachined workpieces.

FIG. 1 is a perspective view of a workpiece machining system according to an embodiment of the workpiece machining system of the present invention. FIG. 2 is a front view of the workpiece machining system. FIG. 3 is a top view of the workpiece machining system. FIG. 4 is a block diagram of the workpiece machining system. FIG. 5 is a front view of the first stage of the normal mode of the workpiece machining system. FIG. 6 is a front view of the second stage of the normal mode. FIG. 7 is a front view of the third stage of the normal mode. FIG. 8 is a front view of the fourth stage of the normal mode. FIG. 9 is a front view of the fifth stage of the normal mode. FIG. 10 is a front view of the sixth stage of the normal mode. FIG. 11 is a front view of the sixth stage of the automatic mode of the workpiece machining system. FIG. 12 is a schematic diagram of machining in the automatic mode of the workpiece machining system.

1: Work processing system.
2: workpiece transfer device, 20: transfer robot, 200: travel axis slide, 201: Y-axis telescopic arm, 202: robot arm, 203: robot chuck, 204: main body, 21: robot platform, 22: support, 24: Robot arm vertical axis motor 25: Robot traveling motor 26: Robot chuck turning motor
3: machining center (machine tool), 30: bed, 31: spindle stock, 310: X-axis lower slide, 311: X-axis slide, 312: main body, 313: spindle chuck, 314: X-axis motor, 315: rotary motor, 32: Tool axis side slide, 320: Z axis lower slide, 321: Z axis slide, 322: Column, 323: Y axis lower slide, 324: Y axis slide, 325: Y axis motor, 326: Z axis motor, 327 : Tool axis, 33: control device, 330: computer, 330a: input / output interface, 330b: calculation unit, 330c: storage unit, 34: input device.
4L: Work stocker, 4R: Work stocker, 40: Traveling platform, 41: Board, 42: Lift plate, 43: Shaft, 46: Lifting device, 460: Cylinder, 461: Guided member, 462: Guide rail, 463: Connecting member, 464: fork, 47: moving device, 470: sprocket, 471: chain, 472: moving motor.
A1 to A10: position, B1 to B10: work placement portion, L: track, T: tool, W: work, W1 to W3: work.

  Hereinafter, embodiments of the workpiece machining system of the present invention will be described.

<Configuration of workpiece machining system>
First, the configuration of the workpiece machining system according to the present embodiment will be described. In FIG. 1, the perspective view of the workpiece processing system of this embodiment is shown. FIG. 2 shows a front view of the workpiece machining system. FIG. 3 shows a top view of the workpiece machining system. FIG. 4 shows a block diagram of the workpiece machining system. As shown in FIGS. 1 to 4, the workpiece machining system 1 of this embodiment includes a workpiece transfer device 2, a machining center 3, and two workpiece stockers 4 </ b> L and 4 </ b> R. The machining center 3 is included in the concept of the “machine tool” of the present invention.

[Machining center 3]
The machining center 3 includes a bed 30, a head stock 31, a tool shaft side slide 32, and a control device 33.

(Bed 30 and headstock 31)
The bed 30 is arranged on the floor of the factory. The headstock 31 is disposed on the left portion of the upper surface of the bed 30. The head stock 31 includes an X-axis (front-rear direction) lower slide 310, an X-axis slide 311, a main body 312, a main shaft chuck 313, an X-axis motor 314, and a rotation motor 315.

  The X-axis lower slide 310 is disposed on the upper surface of the bed 30. The X-axis lower slide 310 extends in the front-rear direction. The X-axis slide 311 is attached to the X-axis lower slide 310 so as to be movable in the front-rear direction. The X-axis motor 314 drives the X-axis slide 311. The main body 312 is attached to the X-axis slide 311. The spindle chuck 313 is a so-called three-claw chuck. The configuration of the three-jaw chuck is disclosed in Japanese Patent Application Laid-Open No. 11-300568 and Japanese Utility Model Publication No. 4-32197. The spindle chuck 313 is fixed to a workpiece holding shaft (not shown). The work holding shaft extends in the left-right direction (Z-axis direction). The rotation motor 315 rotates the workpiece holding shaft around the axis. The spindle chuck 313 can grip and release the cylindrical workpiece W by three claw members (not shown). When the workpiece W and the spindle chuck 313 rotate around the axis together with the workpiece holding shaft, the processing angle (for example, 30 °, 45 °, etc.) of the workpiece W is indexed.

(Tool axis side slide 32)
The tool shaft side slide 32 is disposed on the right portion of the upper surface of the bed 30. The tool axis side slide 32 includes a Z axis lower slide 320, a Z axis slide 321, a column 322, a Y axis (vertical direction) lower slide 323, a Y axis slide 324, a Y axis motor 325, and a Z axis motor. 326 and a tool shaft 327.

  The Z-axis lower slide 320 is disposed on the upper surface of the bed 30. The Z-axis lower slide 320 extends in the left-right direction. The Z-axis slide 321 is attached to the Z-axis lower slide 320 so as to be movable in the left-right direction. The Z axis motor 326 drives the Z axis slide 321. The column 322 is attached to the Z-axis slide 321. The Y-axis lower slide 323 is disposed on the left surface of the column 322. The Y-axis lower slide 323 extends in the up-down direction. The Y-axis slide 324 is attached to the Y-axis lower slide 323 so as to be movable in the vertical direction. The Y axis motor 325 drives the Y axis slide 324. A tool T is attached to the tool shaft 327 so as to be replaceable.

(Control device 33, input device 34)
The control device 33 includes a computer 330 and a plurality of drive circuits. The computer 330 includes an input / output interface 330a, a calculation unit 330b, and a storage unit 330c. The input / output interface 330a is connected to the X-axis motor 314, the rotation motor 315, the Y-axis motor 325, the Z-axis motor 326 of the tool axis side slide 32, and the robot arm of the work transfer device 2 described later via a drive circuit. It is connected to a vertical axis motor 24, a robot traveling motor 25, a robot chuck turning motor 26, cylinders 460 of two work stockers 4L and 4R described later, and a moving motor 472. Further, the input / output interface 330 a is connected to the input device 34.

[Work transfer device 2]
The workpiece transfer device 2 is a so-called gantry loader. The workpiece transfer device 2 includes a transfer robot 20, a robot carriage 21, a pair of support posts 22, a robot arm vertical axis motor 24, a robot running motor 25, and a robot chuck turning motor 26. .

(A pair of struts 22 and a robot carriage 21)
Of the pair of left and right columns 22, the left column 22 is fixed to the left surface of the bed 30. The left column 22 extends in the vertical direction. The right column 22 is fixed to the right surface of the bed 30. The right column 22 extends in the vertical direction. The robot carriage 21 is installed between the upper ends of a pair of left and right columns 22. The robot carriage 21 extends in the left-right direction.

(Transport robot 20, robot arm vertical axis motor 24, robot travel motor 25, robot chuck rotation motor 26)
The transfer robot 20 includes a travel axis slide 200, a Y-axis telescopic arm 201, a robot arm 202, a pair of robot chucks 203, and a main body 204. The travel axis slide 200 is attached to the robot platform 21 so as to be movable in the left-right direction. The robot travel motor 25 drives the travel axis slide 200. The main body 204 is fixed to the traveling shaft slide 200. The Y-axis telescopic arm 201 can be expanded and contracted downward with respect to the main body 204. The robot arm vertical axis motor 24 drives the Y-axis telescopic arm 201. The robot arm 202 protrudes backward from the lower end of the Y-axis telescopic arm 201. The robot arm 202 can rotate around an axis. The robot for turning the chuck chuck 26 drives the robot arm 202. The pair of robot chucks 203 are attached to the rear end of the robot arm 202. Both of the pair of robot chucks 203 are so-called three-jaw chucks.

[Work stocker 4L, 4R]
Next, the configuration of the work stockers 4L and 4R will be described. The work stocker 4L is arranged on the left side of the machining center 3. The work stocker 4R is disposed on the right side of the machining center 3.

  The configuration of the work stocker 4L and the configuration of the work stocker 4R are the same. The arrangement of the work stocker 4L and the arrangement of the work stocker 4R are symmetrical. The work stocker 4L includes a traveling platform 40, a total of ten work placement units B1 to B10, a lifting device 46, and a moving device 47.

(Moving device 47)
The moving device 47 includes a pair of front and rear sprockets 470, a chain 471, and a moving motor 472. The pair of front and rear sprockets 470 are disposed on the upper surface of the traveling platform 40. The chain 471 is stretched between a pair of front and rear sprockets 470. The moving motor 472 drives one sprocket 470.

(Elevating device 46)
The lifting device 46 includes a cylinder 460, a guided member 461, a guide rail 462, a connecting member 463, and a fork 464. The guide rail 462 is disposed on the front surface of the traveling platform 40. The guide rail 462 extends in the vertical direction. The guided member 461 is attached to the guide rail 462 so as to be movable in the vertical direction. The rod of the cylinder 460 is attached to one end of the guided member 461. On the other hand, a fork 464 is attached to the other end of the guided member 461 via a connecting member 463. By driving the cylinder 460, the fork 464 can be moved in the vertical direction.

(Work placement parts B1 to B10)
The work placement portions B1 to B10 are attached to the chain 471 of the moving device 47 at a predetermined interval. By driving the moving motor 472, the workpiece placement portions B1 to B10 can be moved along the elliptical track L shown in FIG. In the work placement portions B1 to B10, the work W can be stacked up and down in a maximum of three stages. Positions A1 to A10 are assigned to the traveling platform 40. The workpiece placement parts B1 to B10 move stepwise by a pitch corresponding to the interval between the adjacent positions A1 to A10. As shown by hatching in FIGS. 2 and 3, the uppermost stage (the third stage from the bottom) of the position A <b> 1 is the supply / discharge position of the workpiece W. In an automatic mode, which will be described later, the unprocessed workpiece W is carried out to the machining center 3 from the uppermost position at the position A1. On the other hand, the processed workpiece W is carried into the workpiece stocker 4L from the uppermost position at the position A1.

  The configuration of the work placement units B1 to B10 is the same. The work placement unit B <b> 1 includes a substrate 41, a lifting plate 42, and three shafts 43. The substrate 41 is fixed to the chain 471. Three casters (not shown) are arranged on the lower surface of the substrate 41. The substrate 41 can travel along the track L on the upper surface of the traveling platform 40. The three shafts 43 protrude from the upper surface of the substrate 41. The lifting plate 42 is disposed on the upper side of the substrate 41. At the position A1, the elevating plate 42 is movable in the vertical direction by the fork 464 of the elevating device 46. The three shafts 43 penetrate the lifting plate 42. The workpiece W is stacked on the upper side of the lifting plate 42. The three shafts 43 hold the workpiece W from the outside in the radial direction. Depending on the outer diameter of the workpiece W, the radial positions of the three shafts 43 can be adjusted.

<Normal mode>
Next, the operation in the normal mode of the workpiece machining system according to this embodiment will be described. FIG. 5 shows a front view of the first stage of the normal mode of the workpiece machining system of the present embodiment. FIG. 6 shows a front view of the second stage of the normal mode. FIG. 7 shows a front view of the third stage of the normal mode. FIG. 8 shows a front view of the fourth stage of the normal mode. FIG. 9 shows a front view of the fifth stage of the normal mode. FIG. 10 shows a front view of the sixth stage of the normal mode. 5 to 10, the processed workpieces W1 to W3 are hatched.

  As shown in FIGS. 5 to 10, in the normal mode, the workpieces W <b> 1 to W <b> 3 are transported in the order of the left work stocker 4 </ b> L → the machining center 3 → the right work stocker 4 </ b> R. That is, before the workpieces W1 to W3 are processed, the left workpiece stocker 4L is fully loaded with unprocessed workpieces W1 to W3. On the other hand, the workpiece stocker 4R on the right side is empty before the workpieces W1 to W3 are processed.

  The operator issues an instruction to execute the normal mode to the control device 33 via the input device 34 shown in FIG. First, the control device 33 appropriately drives the robot traveling motor 25, the robot arm vertical axis motor 24, and the robot chuck turning motor 26 of the workpiece transfer device 2. Then, as shown in FIG. 5, the robot chuck 203 is moved to a position just above the position A1 of the left work stocker 4L (that is, the work placement section B1). The control device 33 uses the robot chuck 203 to grip the uppermost unprocessed workpiece W1 of the workpiece placement unit B1.

  Next, the control device 33 appropriately drives the robot traveling motor 25, the robot arm vertical axis motor 24, and the robot chuck turning motor 26 of the workpiece transfer device 2. Then, as shown by arrows Y <b> 1 to Y <b> 3 in FIG. 6, the unprocessed workpiece W <b> 1 is transferred from the robot chuck 203 to the spindle chuck 313.

  Subsequently, the control device 33 appropriately drives the X-axis motor 314, the rotation motor 315 of the headstock 31, and the Y-axis motor 325 and the Z-axis motor 326 of the tool shaft side slide 32. Then, as shown in FIG. 7, the tool T is used to perform a predetermined process on the unprocessed workpiece W1.

  In parallel with the processing of the workpiece W1, the control device 33 appropriately drives the robot traveling motor 25, the robot arm vertical axis motor 24, and the robot chuck turning motor 26 of the workpiece conveying device 2. Then, as indicated by arrows Y4 to Y6 in FIG. 7, the robot chuck 203 is moved to a position just above the position A1 of the left work stocker 4L (that is, the work placement portion B1). The control device 33 drives the cylinder 460 of the lifting device 46 of the left work stocker 4L. Then, as shown by an arrow Y7 in FIG. 7, the unprocessed workpiece W2 of the workpiece placement unit B1 is lifted to a predetermined height. The control device 33 grips the unprocessed workpiece W2 by the robot chuck 203.

  Then, the control device 33 appropriately drives the robot traveling motor 25, the robot arm vertical axis motor 24, and the robot chuck turning motor 26 of the workpiece transfer device 2. Then, as shown by arrows Y8 to Y10 in FIG. 8, the processed workpiece W1 is transferred from the spindle chuck 313 to the robot chuck 203 (the robot chuck 203 that does not hold the workpiece W2). Subsequently, the control device 33 appropriately drives the robot for rotating the chuck chuck 26 and the robot traveling motor 25. Then, as shown in FIG. 9, the unprocessed workpiece W <b> 2 is transferred from the robot chuck 203 to the spindle chuck 313.

  Thereafter, the control device 33 appropriately drives the X-axis motor 314, the rotation motor 315 of the headstock 31, the Y-axis motor 325 of the tool shaft side slide 32, and the Z-axis motor 326. Then, as shown in FIG. 10, the tool T is used to perform a predetermined process on the unprocessed workpiece W2.

  In parallel with the processing of the workpiece W2, the control device 33 appropriately drives the robot travel motor 25, the robot arm vertical axis motor 24, and the robot chuck turning motor 26 of the workpiece transfer device 2. Then, as indicated by arrows Y11 to Y13 in FIG. 10, the robot chuck 203 is moved to a position just above the position A1 (that is, the work placement portion B1) of the right work stocker 4R. The control device 33 drives the cylinder 460 of the lifting device 46 of the right work stocker 4R. Then, as shown by an arrow Y14 in FIG. 10, the lifting plate 42 of the workpiece placement unit B1 is lifted to a predetermined altitude. The control device 33 places the processed workpiece W <b> 1 on the upper surface of the lifting plate 42 by the robot chuck 203. Then, as shown in FIG. 7, the control device 33 uses the workpiece transfer device 2 to pick up the unprocessed workpiece W3 of the workpiece placement unit B1 up to the position A1 of the left workpiece stocker 4L.

  Thus, in the normal mode, the workpieces W1 to W3 are conveyed in the order of the left work stocker 4L → the machining center 3 → the right work stocker 4R. In addition, workpiece placement units B1 to B10 full of workpieces are sequentially arranged at a position A1 (supply position) of the left workpiece stocker 4L. In addition, empty work placement portions B1 to B10 are sequentially arranged at a position A1 (discharge position) of the right work stocker 4R.

<Auto mode>
Next, the movement in the automatic mode of the workpiece machining system according to the present embodiment will be described. FIG. 11 shows a front view of the sixth stage of the automatic mode of the workpiece machining system of the present embodiment. That is, FIG. 11 corresponds to FIG. In FIG. 11, the processed workpieces W1 to W3 are hatched.

  The automatic mode is executed when, for example, the worker leaves the workpiece machining system 1. In the automatic mode, the workpieces W1 to W3 are first transported in the order of the left work stocker 4L → the machining center 3 → the left work stocker 4L again. Subsequently, the workpieces W1 to W3 are conveyed in the order of the right work stocker 4R → the machining center 3 → the right work stocker 4R again.

  Before processing the workpieces W1 to W3, unprocessed workpieces W1 to W3 are arranged on the workpiece stockers 4L and 4R on both the left and right sides. Specifically, as shown in FIGS. 1 to 3, unprocessed workpieces W1 to W3 are provided at workpiece placement portions B1 to B9 arranged at positions A1 to A9 in both the left and right workpiece stockers 4L and 4R. Is packed. On the other hand, the work placement unit B10 placed at the position A10 is empty.

  The operator issues an instruction to execute the automatic mode to the control device 33 via the input device 34 shown in FIG. As in the normal mode, the control device 33 carries the unprocessed workpiece W1 from the left workpiece stocker 4L to the machining center 3, as shown in FIGS. Further, the machining center 3 processes the unprocessed workpiece W1. Further, the unprocessed workpiece W2 is carried from the left workpiece stocker 4L to the machining center 3.

  In the normal mode and the automatic mode, the unloading destination of the processed workpiece W1 is different. That is, in the normal mode, as shown in FIG. 10, the processed workpiece W1 is carried out from the machining center 3 to the right-side workpiece stocker 4R. On the other hand, in the automatic mode, as shown in FIG. 11, the processed workpiece W1 is carried out from the machining center 3 to the left workpiece stocker 4L.

  Specifically, first, the control device 33 appropriately drives the robot traveling motor 25, the robot arm vertical axis motor 24, and the robot chuck turning motor 26 of the workpiece transfer device 2 in parallel with the processing of the workpiece W2. Then, as indicated by arrows Y15 to Y17 in FIG. 11, the robot chuck 203 is moved to a position just above the position A1 of the left work stocker 4L.

  Next, as shown in FIGS. 3 and 4, the control device 33 drives a moving motor 472 of the moving device 47 of the left work stocker 4L. Then, the empty work placement portion B10 shown in FIG. 3 is moved by one pitch from the position A10 to the position A1. At this time, the unprocessed workpiece W3 remains in the workpiece placement portion B1. As the work placement unit B10 moves, the work placement unit B1 moves from position A1 to position A2.

  Next, the control device 33 drives the cylinder 460 of the lifting device 46 of the left work stocker 4L. And as shown by the arrow 18 in FIG. 11, the raising / lowering board 42 of the workpiece | work arrangement | positioning part B1 is lifted to a predetermined | prescribed altitude. The control device 33 places the processed workpiece W <b> 1 on the upper surface of the lifting plate 42 by the robot chuck 203.

  Then, the control device 33 drives the moving motor 472 of the moving device 47 of the left work stocker 4L again. Then, the workpiece placement section B1 (with the unprocessed workpiece W3 mounted) shown in FIG. 3 is moved back from the position A2 to the position A1. Along with the backward movement of the workpiece placement portion B1, the workpiece placement portion B10 (with the processed workpiece W1 mounted) moves backward from the position A1 to the position A10. Thereafter, as shown in FIG. 7, the control device 33 uses the workpiece transfer device 2 to pick up the unprocessed workpiece W3 in the workpiece placement section B1 up to the position A1 of the left workpiece stocker 4L.

  As described above, in the automatic mode, first, the workpieces W1 to W3 are transported in the order of the left work stocker 4L → the machining center 3 → the left work stocker 4L. Next, the workpieces W1 to W3 are transported in the order of the right workpiece stocker 4R → the machining center 3 → the right workpiece stocker 4R.

  FIG. 12 shows a machining schematic diagram in the automatic mode of the workpiece machining system of the present embodiment. FIG. 12 shows only the work stocker 4L on the left side. Further, hatching is performed on the workpiece placement portions B1 to B10 on which the processed workpieces are mounted. Further, “×” is given to the empty work placement portions B1 to B10. In addition, the automatic mode proceeds from the upper side to the lower side in FIG.

  As shown in FIG. 12, at the start of the automatic mode (uppermost stage), unprocessed workpieces W1 to W3 are arranged in the workpiece arrangement portions B1 to B9. The work placement unit B10 is empty. On the other hand, at the end of the automatic mode (lowermost stage), the processed workpieces W1 to W3 are arranged in the workpiece arrangement portions B10 to B8. The work placement unit B9 is empty.

  As the automatic mode progresses, the positional relationship between the positions A1 to A10 and the workpiece placement parts B1 to B10 is shifted by one pitch. That is, the workpiece placement portions B1 to B10 are sequentially arranged at the position A1 having the supply and discharge positions of the workpieces W1 to W3. On the other hand, empty work placement portions B1 to B10 are sequentially placed at a position A10 adjacent to the position A1.

  In the automatic mode, the workpieces W1 to W3 of the right workpiece stocker 4R are processed in the same manner as the workpieces W1 to W3 of the left workpiece stocker 4L.

<Effect>
Next, the effect of the workpiece machining system of this embodiment will be described. According to the workpiece machining system 1 of the present embodiment, as shown in FIG. 3, in the automatic mode, the two workpiece stockers 4L and 4R can each be used for supplying an unmachined workpiece W. For this reason, compared with the case where the unprocessed workpiece | work W is fully set to the single workpiece | work stocker 4L, the number of sets of the unprocessed workpiece | work W can be increased. Therefore, compared with the case where only the single workpiece stocker 4L is used for supplying the unmachined workpiece W, the number of workpieces W (the number of machining) in the automatic mode can be increased. Therefore, it is possible to perform unmanned operation for a long time, and as a result, the productivity of the workpiece W can be improved.

  The automatic mode is executed when the operator leaves the workpiece machining system 1. After completion of the automatic mode, when the time until the worker returns and starts the normal mode is long (that is, when the time until the unprocessed workpiece W is replenished is long), the downtime of the workpiece machining system 1 becomes long. End up. In this regard, according to the workpiece machining system 1 of the present embodiment, the number of workpieces W produced in the automatic mode can be increased. For this reason, the downtime accompanying a worker's absence can be shortened.

  Further, according to the workpiece machining system 1 of the present embodiment, as shown in FIG. 12, in the automatic mode, the workpieces that have been machined are accommodated in the workpiece placement units B1 to B10 according to a predetermined rule. For this reason, it is easy to confirm from which work placement part B1 to B10 to which work placement part B1 to B10 an arbitrary work has moved along with the machining. That is, it is easy to trace the workpiece.

  Further, according to the workpiece machining system 1 of the present embodiment, as shown in FIG. 3, the two workpiece stockers 4L and 4R can each be used for discharging the machined workpiece W. For this reason, compared with the case where the processed workpiece W is fully set in the single workpiece stocker 4R, the set number of processed workpieces W can be increased. Accordingly, the number of workpieces W produced (the number of workpieces) can be increased as compared with the case where only the single workpiece stocker 4R is used for discharging the workpieces W that have been processed. Therefore, the productivity of the workpiece W is unlikely to decrease.

  Moreover, according to the workpiece processing system 1 of the present embodiment, as shown in FIG. 12, the workpiece W is processed into a workpiece placement portion (for example, the workpiece placement portion B1) where an unprocessed workpiece is placed as the workpiece W is processed. ) To an empty work placement part (for example, work placement part B10).

  Moreover, according to the workpiece processing system 1 of the present embodiment, as shown in FIG. 3, in the automatic mode, the position A1 having the supply / discharge position of the workpiece W and the positions where the empty workpiece placement portions B1 to B10 are placed. A10 is set side by side. For this reason, the movement of the work placement portions B1 to B10 accompanying the supply and discharge of the work W is only required for one pitch. Therefore, the down time accompanying the movement of the work placement portions B1 to B10 can be shortened.

<Others>
The embodiment of the workpiece machining system of the present invention has been described above. However, the embodiment is not particularly limited to the above embodiment. Various modifications and improvements that can be made by those skilled in the art are also possible.

  The conveyance direction and processing order of the workpiece W in the automatic mode are not particularly limited. In the above embodiment, all the workpieces W in the right workpiece stocker 4R are machined after the machining of all the workpieces W in the left workpiece stocker 4L shown in FIG. However, the workpiece W may be processed in the reverse order.

  First, a part (for example, 12 out of 27) of workpieces W on the left work stocker 4L is processed, and then a part of the right side work stocker 4R (for example, 12 out of 27) is processed. Machining of the workpiece W is performed, then the remaining portion of the left workpiece stocker 4L (for example, 15 out of 27 workpieces) is processed, and finally the remaining portion of the right workpiece stocker 4R (for example, of 27 workpieces) 15 workpieces W may be processed.

  First, a part of the workpiece W (for example, the inner peripheral surface) of the left work stocker 4L is processed, and then a part of the workpiece W (for example, the inner peripheral surface) of the right workpiece stocker 4R is processed. Subsequently, the remaining portion (for example, the outer peripheral surface) of the workpiece W of the left work stocker 4L may be processed, and finally the remaining portion (for example, the outer peripheral surface) of the workpiece W of the right work stocker 4R may be processed.

  Further, the unprocessed workpiece W of the left workpiece stocker 4L may be moved to the right workpiece stocker 4R after machining. Further, the unprocessed workpiece W of the right workpiece stocker 4R may be moved to the left workpiece stocker 4L after machining. In this case, if empty work placement portions B1 to B10 are provided only in one of the two work stockers 4L and 4R, more unprocessed works are prepared. be able to.

  The supply / discharge positions of the workpiece W shown in FIG. 3 may be set at positions A2 to A10 other than the position A1. Moreover, the supply position and discharge position of the workpiece W may be different. The position of the empty work placement portion B10 shown in FIG. 3 may be set to positions A1 to A9 other than the position A10. Further, a plurality of empty work placement portions B10 may be set.

  Moreover, in the said embodiment, as shown in FIG. 3, at the time of automatic mode start, no workpiece | work is arrange | positioned at the empty workpiece | work arrangement | positioning part B10. However, for management purposes, if unprocessed workpieces may remain in the workpiece stockers 4L and 4R after the automatic mode ends, the workpiece placement units B1 to B10 of all the workpiece stockers 4L and 4R may have A full set of raw workpieces may be set. That is, the total number of unprocessed workpieces set in the workpiece stockers 4L and 4R at the start of the automatic mode (before workpiece processing) is not particularly limited. By setting the workpiece stockers 4L and 4R to a larger number of workpieces than the total number of workpieces that can be set in a single workpiece stocker 4L and 4R, and executing the automatic mode, it is possible to increase the number of workpiece production (the number of machining). it can.

  In the above embodiment, the gantry loader is used as the work transfer device 2, but other types of loaders may be used. The configuration of the transfer robot 20 is not particularly limited. Instead of the Y-axis telescopic arm 201 shown in FIG. 1, a swing arm that swings in the front-rear direction may be arranged. The type of machine tool is not particularly limited. Instead of the machining center 3, a lathe, drilling machine, milling machine, turning center or the like may be arranged.

Claims (4)

At least one machine tool for performing predetermined machining on the workpiece;
A plurality of work stockers that are arranged at positions sandwiching the machine tool and each hold the unprocessed work before the work is processed;
A workpiece transfer device capable of transferring the workpiece between the workpiece stocker and the machine tool;
Equipped with a,
The work stocker has a plurality of work placement units,
The work placement unit can be placed by stacking a plurality of the works,
A workpiece machining system in which the workpiece is not arranged in at least one workpiece arrangement section before the workpiece is machined.   The workpiece processing system according to claim 1, wherein the plurality of workpiece stockers each have the processed workpiece after the processing of the workpiece. It can be switched between normal mode and automatic mode,
Before machining the workpiece in the normal mode, the workpiece stocker on one side of the machine tool among the plurality of workpiece stockers holds the workpiece that has not been machined. The work stocker on the direction side does not hold the unprocessed work,
The workpiece machining system according to claim 1 or 2, wherein each of the plurality of workpiece stockers has an unmachined workpiece before machining the workpiece in the automatic mode . The work stocker has a traveling platform to which a plurality of positions are assigned,
The plurality of work placement portions are movable along the predetermined trajectory passing through the plurality of the positions on the upper surface of the traveling platform,
4. The workpiece machining system according to claim 1 , wherein the position having the workpiece supply / discharge position and the position at which the empty workpiece placement portion is placed are set side by side. 5. .

Images