JP4632661B2 - Press processing system - Google Patents

Description

The present invention relates to a workpiece processing technique using a press, and more particularly to a pressing system useful for pressing a long workpiece for forming a main wing of an airplane.

  In general, various press machines are used as a device for punching or drawing a workpiece made of a steel plate or the like. However, the setting of the workpiece with respect to the processing point is performed manually or by moving the workpiece with an arm-type loader / unloader. For long workpieces, a conveyor is provided on both sides of the press to enable workpiece transfer.

  For example, a conveyor is provided before and after the press, the front end of a long workpiece placed on one conveyor is drawn into the press, the workpiece is transferred to the other conveyor, and the rear end Is drawn with a press (for example, Patent Document 1).

  In press working by a press machine body, a work placed on a work table is moved by a work moving means such as a feed screw mechanism or an endless belt (for example, Patent Document 2).

Japanese Patent Laid-Open No. 11-188437 (paragraphs 0026 to 0028, FIGS. 1 and 8)

Japanese Patent Laid-Open No. 11-5130 (Embodiment of the Invention, FIGS. 1 and 11)

  However, as in the conventional example (Patent Documents 1 and 2, etc.), the method of moving the workpiece while fixing the press machine makes it difficult to ensure the positioning accuracy of the press processing point due to workpiece slipping or meandering. In addition, since it is twice as long as the movable region of the workpiece, it is very difficult to secure an installation area with equipment corresponding to a long workpiece.

  The present invention has been made in view of the circumstances as described above, and an object of the present invention is to enable a long work to be satisfactorily pressed in a narrow space as much as possible.

In order to achieve the above object, the present invention provides a work supporting means for supporting a work in a predetermined position, and a press provided with an upper mold and a lower mold for pressing the work supported in the predetermined position by the work supporting means. A press working system comprising a press and a press moving means for moving the press along the workpiece to a processing point,
The work support means comprises a plurality of support devices arranged at predetermined intervals along the movement path of the press machine, each support device having a table on which a work is placed and immediately before the press machine reaches the position of the table. Further, the table includes a retractable support leg that lowers the table to a position where it does not interfere with the press and passes the press up and returns the table to the work support position.

In addition, the table is provided with a holder for restricting the displacement of the workpiece .

Further, the press working system as described above is characterized by including a control device that automatically controls the lifting operation of each support device, the movement of the press machine by the press moving means, and the driving of the press machine at the processing point .

Further, the present invention is characterized in that a work guide is provided which pushes up a work passed between the upper mold and the lower mold of the press machine to prevent interference between the work and the upper mold and the lower mold.

The pressing machine moving means includes a wheel arranged at a lower part of the pressing machine, and a guide rail on which the wheel is mounted, and the wheel is driven by a driving source to be rotated, and the driving wheel And a driven wheel that rotates on the guide rail by rotation of the guide wheel, and the press machine is provided with a sensor that detects a rotation amount of the driven wheel and outputs a signal for stopping the driving source. It is characterized by .

  According to the present invention, since the press machine is moved without moving the workpiece, the forming accuracy can be improved without causing the workpiece to slip or meander, and an arrangement area equivalent to the length of a long workpiece can be obtained. It is possible to perform press working only by securing.

  In addition, since the press machine is provided with a work guide that prevents the interference between the lower mold and the work by pushing up the work passed between the upper mold and the lower mold when moving, the press does not interfere with the work. It can be moved well.

  Further, as a press machine moving means, a wheel provided at the lower part of the press machine and a guide rail on which the wheel is mounted, a drive wheel in which the wheel is driven to rotate by a drive source, and a guide by rotation of the drive wheel. The press machine is composed of driven wheels that rotate on the rail, and the press machine is provided with a sensor that detects the amount of rotation of the driven wheel and outputs a signal for stopping the drive source. It can be controlled accurately.

  In addition, since the work support means is composed of a plurality of support devices arranged at predetermined intervals along the moving path of the press machine, even a long work made of a thin steel plate or the like can be prevented from being bent due to its own weight. Each support device can support the table, and the table is lowered to a position where the press does not interfere with the press just before the press reaches the position of the table. Since it has the extendable and retractable support legs that return to the support position, the press can be reliably moved while the work is supported at a predetermined height.

  In addition, since the table of each support device is provided with a holder for restricting the displacement of the workpiece, it is possible to prevent the workpiece from rattling and to perform good pressing.

  In addition, it is equipped with a control device that automatically controls the lifting and lowering operation of each supporting device that constitutes the workpiece supporting means, the movement of the pressing machine by the pressing machine moving means, and the driving of the pressing machine at the processing point. The press can be performed unattended and efficiently.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic side view showing a preferred example of a press working system according to the present invention. In FIG. 1, reference numeral 1 denotes a press machine. The press machine 1 is movable in the length direction along a long work W forming a main wing of an airplane. Reference numeral 2 denotes a pressing machine moving means for moving the press machine 1 in the length direction of the workpiece W. The moving means 2 is laid on the wheel 3 installed at the lower part of the pressing machine 1 and the floor of the factory. The guide rail 4 is provided, and the wheel 3 is rotatably mounted on the guide rail 4. Note that the press machine 1 may be movably supported by a drive roller conveyor or the like instead of such a press machine moving means.

  Reference numeral 5 denotes a work support means for arranging and supporting the work W along the movement path of the press machine 1 (guide rail 4 in this example). The support means 5 is arranged along the movement path of the press machine 1. It is composed of a plurality of (9 in the illustrated example) supporting device 6 having a pier shape arranged at a predetermined interval. Each of the support devices 6 can be vertically expanded and contracted so as not to interfere with the press machine 1, and supports the workpiece W at a predetermined height when extending as illustrated, and floor holes drilled one step from the laying surface of the guide rail 4 when contracting. 7 is stored. In FIG. 1, reference numeral 8 denotes a stopper provided at both ends of the guide rail 4 in order to prevent the press machine 1 from overrunning.

  According to the press working system, the press machine 1 moves in the length direction of the work W arranged horizontally on each support device 6, and the press machine 1 uses the predetermined part of the work W or one end thereof. The press work is sequentially performed from the side to the other end side, and each support device 6 is in the floor hole 7 in order from the support device 6 on the one end side immediately before the press machine 1 arrives so as to allow passage of the press machine 1. And is automatically controlled by the control device C so as to rise to support the workpiece W after passing through the press machine 1.

  Therefore, it is possible to form the workpiece W with high precision while positioning the workpiece W at a predetermined position, and it is only necessary to secure an arrangement space equivalent to the length of the workpiece W as the area necessary for the press work, so that the space can be effectively used. Can be planned. In addition, although the control apparatus C is mounted in the press machine 1, you may make it arrange | position this along the movement path | route of the press machine 1. FIG. Further, the control device C can control the raising / lowering (extension / contraction) operation of the support device 6 based on a position signal of the press 1 by a proximity switch (not shown).

  Next, the configuration of the press machine 1 will be described. FIG. 2 is a schematic front view showing the press machine, and FIG. 3 shows a side view of the press machine. As apparent from FIG. 2, the press machine 1 has a gate-shaped frame 9, and a crown 10 and a bed 11 are provided opposite to each other on the top and bottom, and a hydraulic or mechanical drive is provided on the crown 10. A portion 12 is provided. Further, an upper mold 13 that is moved up and down by the drive unit 12 is provided below the crown 10, and a lower mold 14 corresponding to the upper mold 13 is attached on the bed 11. In this example, the press machine 1 has an upper die 13 and a lower die 14 in the X-axis direction (left-right direction in FIG. 2), Y-axis direction (perpendicular to the plane of FIG. 2), and θ-axis direction (around the vertical axis). The upper die 13 and the lower die are operated in a known XYZ-θ axis system in which the upper die 13 moves in the Z-axis direction (vertical direction in FIG. 2). Any one of 14, preferably a single-axis type in which the upper mold 13 performs only the raising / lowering operation may be employed.

  Here, the lower part of the press machine 1 is equipped with the wheel 3 for traveling as described above, and the wheel 3 is a four-wheel vehicle in which the drive wheel 3A and the driven wheel 3B are arranged on both sides of the press machine 1 one by one. The structure is such that the driving wheel 3A and the driven wheel 3B are mounted on the guide rail 4 laid in parallel as shown in FIG. The guide rail 4 is fixed on a rail holder 15 made of H-shaped steel or the like, and the press machine 1 is provided with a claw 16 that engages with the outer edge of the guide rail 4 as shown in FIG. Further, the driving wheel 3A and the driven wheel 3B are provided with flanges, and the flanges are engaged with the inner edge of the guide rail 4.

  FIG. 4 is a schematic cross-sectional view showing a drive wheel mounting portion. As shown in this figure, a gear portion 17 is formed integrally with the drive wheel 3 </ b> A, and its axle 18 is fixed to a wheel cover 19. A pinion 20 that meshes with the gear portion 17 is accommodated in the wheel cover 19, and the pinion 20 is rotationally driven by a motor 21 with a brake (drive source). Therefore, the driving wheel 3A is rotated by the driving force transmitted from the pinion 20, and immediately stops by the brake operation when the motor 21 is stopped.

  On the other hand, FIG. 5 shows a mounting portion of the driven wheel. As shown in the figure, the sprocket 22 is fixed to the driven wheel 3 </ b> B, and the axle 23 is fixed to the wheel cover 24. The wheel cover 24 accommodates another sprocket 26 around which the chain 25 is wound between the sprocket 22 and detects the amount of rotation of the driven wheel 3B from the amount of rotation of the sprocket 26. A sensor 27 (such as a rotary encoder) that outputs a signal for stopping the drive motor 21 is connected. Therefore, press machine stop position data is input to the control device C shown in FIG. 1 and the like, and the data is compared with the signal from the sensor 27 to control the motor 21. 1 can be sequentially stopped at predetermined positions. In particular, since the motor 27 is controlled by detecting the rotation amount of the driven wheel 3B with a low possibility of idling by the sensor 27, the press machine 1 is accurately stopped at a predetermined position and the workpiece is formed with high accuracy. Can do.

  Next, a description will be given of a support device that constitutes the work support means. The support device 6 includes a table 28 for placing a work and support legs 29 that support the work as shown in FIG. . The table 28 has a support arm 30 projecting in the length direction of the workpiece, and a receiving seat 31 is provided on the support arm 30 to contact the bottom surface of the workpiece.

  As is apparent from FIG. 7, the support arms 30 are provided in parallel in the left-right direction (work width direction) at a predetermined interval, and the position of the work is shifted between the two front and rear support arms 30 on the table 28. A rail 33 is provided for sliding the holder 32 for regulating the movement.

  As shown in FIG. 8, the holder 32 includes a slide 34 that engages with a rail 33, a movable table 35 that is fixed on the slide, and a swing plate 36 that is pin-joined on the movable table. Among these, the movable base 35 is provided with a clamp lever 37 for restricting the sliding of the holder 32 on the rail 33, and a tapered lock pin 38 is set on the tip of the swing plate 36.

  The holder 32 configured as described above can be moved in the length direction of the rail 33 as shown in FIG. 8 by releasing the lock by the clamp lever 37, and the vertical movement of the swing plate 36. By swinging around the axis, the lock pin 38 can be engaged with the portion of the workpiece W even when the side edge of the workpiece W is inclined as shown in FIG. The work W is provided with holes (not shown) along both side edges, and the position of the work W can be regulated by inserting a lock pin 38 into each hole. For the workpiece W having no seed hole, the rocking plate 36 is provided with a member capable of pressing the side surface of the lock pin 38 against the side edge of the workpiece W or pressing the side surface of the workpiece W in place of the lock pin 38. It can respond. In addition, a U-shaped member that sandwiches the side edge of the workpiece W is used instead of the lock pin 38, and the U-shaped member is separated from the workpiece W when the supporting device (table 28) is lowered by an air cylinder or the like. A configuration that can be moved in the width direction of the workpiece W can also be adopted.

  On the other hand, in FIG. 10, the support leg 29 which comprises a support apparatus consists of a pantograph-like lifter which pin-joined a pair of links 39 and 40 in the intermediate part. Reference numeral 41 denotes a lower frame fixed in the floor hole 7, and one link 39 is pin-joined to the lower frame 41 with one end 39A (lower end) as a rotation fulcrum, and the other end 39B (upper end) is a movement fulcrum. Is slidably engaged with the side edge of the table 28. One end 40A (lower end) of the other link 40 is slidably engaged with the lower frame 41 as a movement fulcrum, and the other end 40B (upper end) is pin-connected to the side edge of the table 28 as a rotation fulcrum. Has been. The pair of links 39 and 40 are connected by an actuator (in this example, a hydraulic cylinder 42) for performing an expansion / contraction operation, and the link 39 and the table 28 are connected by an auxiliary link 43 to determine the upper limit position of the table 28. Is done.

  According to the support device 6, the table 28 can be moved up and down by expanding and contracting the pair of links 39 and 40 by controlling the expansion and contraction operation of the hydraulic cylinder 42 by the control device. However, the support device 6 is not limited to the above configuration, and the support leg 29 may be configured to support the table 28 so that it can be moved up and down with several fluid pressure cylinders. Further, it is preferable that the support leg 29 can temporarily stop the expansion and contraction operation at an intermediate position between the upper limit end and the lower limit end of the table 28, whereby the workpiece W can be easily loaded and unloaded.

  Here, the work support position by the support device 6 is shifted from the work position (height) of the work by the upper die and the lower die of the press machine, and the work is processed when the press machine pauses to press the work. By controlling the support device 6 so as to coincide with the position, it is possible to prevent interference between the work and the upper die and the lower die of the press when moving the press machine. In this example, the work support position ( The height) matches the machining position of the workpiece (the upper surface position of the lower mold).

  Therefore, there is a possibility that the lower mold and the workpiece interfere (sliding contact) when the press machine moves, and the work is pressed in the moving direction of the press machine to be deformed or displaced. For this reason, the press machine is provided with a work guide for preventing the upper mold and the lower mold from interfering with the work during the movement.

  As shown in FIGS. 3 and 11, the work guides 44 are provided on both the front and rear sides in the moving direction of the press machine 1 so as to protrude from the frame 9 in the front and rear directions. 3 and the right side of FIG. 11) is actuated to push up the workpiece.

  As is clear from FIG. 12, the work guide 44 has a fixed arm 45 attached to the bed 11 of the press machine and a movable arm 46 provided on the fixed arm. The fixed arm 45 pushes up the movable arm 46. For this purpose, an actuator (air cylinder 47 in this example) is attached, and the telescopic rod 47A is connected to the intermediate portion of the movable arm 46. The movable arm 46 has several rollers 48 for making contact with the bottom surface of the workpiece W, and the tip portion is coupled to the fixed arm 45 as a rotation fulcrum. According to the work guide 44, when the press machine 1 is moved, the air cylinder 47 is extended to swing the movable arm 46 upward, and the work W is pushed up by the roller 48 attached to the lower arm, Interference between the workpieces can be prevented, and when the workpiece is formed by the press machine, the roller 48 can be separated from the workpiece by reducing the air cylinder 47 and the workpiece can be lowered to the processing position (supporting position by the support device). Here, the operation of the work guide 44 is also performed by controlling the air cylinder 47 with the above control device. In place of the above configuration, for example, the movable arm 46 may be omitted, and the roller 48 may be attached to the telescopic rod 47A of the air cylinder.

  Here, to explain the operation of the press working system configured as described above, when press-molding a long workpiece, the press machine 1 is waited on one end side of the guide rail 4 as shown in FIG. A work W is horizontally arranged on each support device 6. In this state, the press machine 1 is moved to the right in FIG. 1, and at that time, immediately before the press machine 1 reaches the position of the table 28 of each support device 6, the support device 6 on the left side in FIG. The table 28 is lowered to a position where it does not interfere with the press machine 1 (in the floor hole 7 in this example), and the lowered table 28 is raised and restored after passing the press machine 1 to support the workpiece W again. Further, when the press machine 1 is moved, the work W is slightly pushed up by the work guide 44 at the front portion of the press machine 1 in order to prevent interference between the lower die and the work. Then, the press machine 1 is sequentially stopped at a predetermined position (processing point). At this time, the work W is lowered to the support position by the support device 6 by the lowering of the work guide 44, and the upper die of the press machine 1 with respect to the work W. And pressure is applied by the lower mold.

  As described above, according to the present invention, while the press machine 1 is moved in the length direction of the long work W arranged on the support device 6, pressure is sequentially applied to the work W from one end side by the press machine 1. Thus, the workpiece can be formed into a predetermined shape over the entire length.

  In this example, the upper mold 13 and the lower mold 14 (see FIG. 2) mounted on the press machine 1 are drawn molds, and various molds such as a punching mold are appropriately selected depending on the processing purpose. Further, the lifting and lowering operation of the support device 6 and the work guide 44, the movement of the press machine 1, and the driving of the press machine 1 at the processing point (work processing operation by the upper mold 13 and the lower mold 14) are performed by a movable operation panel (wireless pendant). ) Or the like, or by automatic control by NC control by the control device as in the above example, etc., when the press machine 1 is manually operated, an operator is placed on the press machine 1 It is preferable to provide a work table to be obtained and to arrange an operation panel in the vicinity thereof, thereby preventing the troublesomeness of the operator from moving to the stop position of the press machine 1 each time.

  Further, the present invention is suitably used for processing a long workpiece as described above. However, according to the present invention, the present invention can be applied to press processing of various workpieces as well as long objects.

Schematic side view showing a press working system according to the present invention Front schematic diagram showing an example of the press used in the system Side schematic diagram of the press Partial sectional view showing the mounting part of the wheel (drive wheel) constituting the press moving means Partial sectional view showing the mounting part of the wheel (driven wheel) constituting the press moving means Schematic side view showing work support means (support device) Schematic plan view showing the table of the support device Schematic side view showing the holder provided on the table Schematic plan view showing the placement of the holder Operation explanatory diagram of support legs constituting the support device Schematic plan view of the press provided on the guide rail Configuration diagram showing the work guide provided in the press

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Press machine 2 Press machine moving means 3 Wheel 3A Drive wheel 3B Driven wheel 4 Guide rail 5 Work support means 6 Support apparatus 13 Upper mold | type 14 Lower mold | type 21 Motor (drive source which rotates a drive wheel)
27 sensor 28 table 29 support leg 32 holder 44 work guide C control device

Claims (6)

A workpiece support means for supporting the workpiece at a predetermined position, a press machine having an upper die and a lower die for pressing the workpiece supported at the predetermined position by the workpiece support means, and the press machine as the workpiece A press working system having a pressing machine moving means for moving along a pressing point,
The work support means comprises a plurality of support devices arranged at predetermined intervals along the movement path of the press machine, each support device having a table on which a work is placed and immediately before the press machine reaches the position of the table. And a telescopic support leg for lowering the table to a position where it does not interfere with the press and returning the table to the work support position after passing through the press. The press working system according to claim 1, wherein the table is provided with a holder that regulates a positional deviation of the workpiece. The press working system according to claim 1 or 2, further comprising a control device that automatically controls the lifting and lowering operation of each supporting device, the movement of the press by the press moving means, and the driving of the press at the processing point . The work guide according to any one of claims 1 to 3, further comprising a work guide that pushes up a work passed between an upper mold and a lower mold of the press machine to prevent interference between the work and the upper mold and the lower mold. The press working system according to item . The press working system according to any one of claims 1 to 4, wherein the pressing machine moving means includes a wheel disposed in a lower part of the pressing machine and a guide rail on which the wheel is placed . The wheel includes a driving wheel that is rotationally driven by a driving source and a driven wheel that rotates on the guide rail by the rotation of the driving wheel, and the press machine detects the amount of rotation of the driven wheel. The press working system according to claim 5, further comprising a sensor that outputs a signal for stopping the driving source .

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