JP3801588B2 - Work processing equipment - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a workpiece processing apparatus, and performs operations such as drilling a large number of holes in a workpiece, cutting a workpiece end surface at a large number of parts, and performing a large number of slits on the outer periphery of a workpiece. Is something that can be done.

  Processing for punching, cutting or slitting the workpiece is performed by placing the workpiece on a fixed die and driving the punch forward by a crank mechanism or a hydraulic cylinder as a thrust generator. When a workpiece is processed into multiple parts, the punch moves backward after machining one part of the workpiece, and after the punch has been retracted, the workpiece is moved away from the die in order to remove the workpiece that has bitten into the fixed die. The workpiece is moved back from the work area by punching, the work is positioned so that the next machining part of the work is directly opposed to the punch, and after the position control of the work is completed, the work is advanced to the work area of the punch. Thus, the next work is started by driving the punch forward after the work preparation is completed. The die on which the workpiece is placed is normally fixed, and the workpiece is removed from the die after machining and moved to the next machining site.

JP 2000-326296 A

In the prior art, when machining a large number of parts in a workpiece, a tool such as a punch is advanced by a crank mechanism or a hydraulic cylinder to wait for the punch to fully retract after the workpiece has been machined. The workpiece is positioned backward and toward the next machining position. Since complete sequence control is performed in this way, the time required for a single drilling operation becomes longer. Especially when a hydraulic cylinder is used as the thrust generator, the response speed of the hydraulic cylinder itself is slow, so the work The speed is significantly slowed down. Even when a crank mechanism is used as a thrust generating device, there is a limit to shortening the time required for one rotation because of its large moment of inertia.
The present invention has been made in view of the above problems, and in the case where a crank mechanism is employed for reciprocation of a tool, the positioning of the workpiece to the next machining site is completed at one time during one rotation of the crank mechanism. By doing so, speedup is realized.

According to the first aspect of the present invention, a slidable tool support for supporting the tool, a slidable support for supporting the support, and a work for supporting the work A support base, a rotary drive motor whose rotary shaft is continuously rotated , a crank mechanism for converting the rotary motion of the rotary shaft of the rotary drive motor into a reciprocating motion in the linear direction of the tool support base, and a support for the workpiece A receiver moving means for reciprocating the receiver support base to move back and forth, and a workpiece moving means for moving the work support base to move the workpiece between the processing parts , the receiver moving during one rotation of the crank mechanism Advancement of the receiver by means , processing of the workpiece by the tool on the tool support after the advancement of the receiver , retraction of the receiver by the receiver movement means after processing the workpiece, the next by the workpiece movement means after retraction of the receiver Wafer to machining position All movement of the click is completed, the workpiece machining device is provided which is characterized in that the series of machining of the workpiece without stopping the rotation drive motor.

  According to a third aspect of the present invention, there is provided the workpiece machining apparatus according to the second aspect, wherein the rotation drive motor is a servo motor.

A slidable tool support for supporting the tool, a slidable support support for supporting the tool, a work support for supporting the work, and moving the tool relative to the work A tool moving means for moving the tool support base and a support base for moving the work piece back to the work site after moving the work piece to the next machining site after moving the work piece with the tool. A workpiece processing apparatus comprising: a receiver moving means for moving; and a workpiece moving means for moving a workpiece support to move the workpiece to the next machining site after the receiver has moved backward from the workpiece. allowed to bracket as moving means is constituted by a toggle mechanism having a rotary drive source, the rotary drive source of the toggle mechanism is characterized in that it is provided separately from the rotary drive motor for the bracket as moving means Over click processing apparatus is provided.

According to the invention described in claim 5 , in the invention described in any one of claims 1 to 4 , the center line in the reciprocating direction of the tool support, the center line of the tool, and the support support There is provided a workpiece machining apparatus in which a center line in a reciprocating direction and a center line of a receiving tool are substantially aligned.

The operation and effect of the invention of claim 1 will be explained. When the movement of the tool toward the workpiece is started by the start of rotation of the crank mechanism, the receiving device moves the receiving device forward toward the workpiece, and the tool and the receiving device are moved. The workpiece is processed with respect to the tool, and after the crank mechanism for the subsequent movement of the workpiece is rotated, the receiver is moved back and separated by the receiver moving means, and then the workpiece moving means is used. Since the workpiece is positioned at the next machining site and all the preparation work up to the positioning of the workpiece at the next machining site is completed during one rotation of the crank mechanism, the workpiece machining speed is significantly improved. Therefore, continuous work is possible without stopping the crank mechanism at all, and the machining speed of the workpiece can be increased to the limit.

The operation and effect of the invention of claim 2 will be explained. By driving the crank mechanism by the servo motor, the rotational position control signal of the servo motor can always be grasped as the position of the crank shaft, and the tool position and the position of the support Can be efficiently controlled.

The operation and effect of the invention of claim 4 will be described. After the workpiece is machined with the tool, the workpiece is moved backward to the next machining site by the workpiece moving means without causing damage to the workpiece. It can be done reliably and accurately. By configuring the receiver moving means with a toggle mechanism having a rotation drive source, the receiver can be quickly retracted and a large thrust during machining by the tool can be received with a sufficient margin.

The operation and effect of the invention of claim 5 will be described. The center line in the reciprocating direction of the tool support base, the center line of the tool, the center line in the reciprocating direction of the support base and the center line of the support By being positioned substantially in a straight line, an offset load is not applied to the tool support base and the support support base, or the offset load is reduced and the life of the tool and the support can be extended.




2

  Referring to the drawings, FIG. 1 shows the principle of a workpiece machining apparatus according to the present invention. A thin panel is formed into a cylindrical shape between a tool 100 and a die (supporting element of the present invention) 102. The tool 100 is connected to an eccentric ring-type crank mechanism 103, and the tool 100 is moved back and forth (in the directions of arrows a1 and a2) by the crank mechanism 103. To drive. That is, the crank mechanism 103 includes a crankshaft 104, an eccentric ring 106 on the crankshaft 104 (an eccentricity = δ), and a connecting rod 108 having one end rotatably attached to the eccentric ring 106. The connecting rod 108 is swung by the rotation of. The other end of the connecting rod is connected to a tool slider (tool support base of the present invention) 116 via a pin 114. The tool slider 116 is slidable with respect to the machine casing 118. Therefore, the rotational motion of the crankshaft 104 is converted into a linear reciprocating motion of the tool slider 116 via the eccentric ring 106 and the connecting rod 108, and the tool 100 attached to the tool slider 116 can be moved back and forth. The crankshaft 104 of the crank mechanism 103 is connected to a rotation shaft of a servo motor (rotary drive motor of the present invention) 120. For example, the servo motor 120 is driven by a pulse, and the crank angle position can be accurately grasped by the number of pulses, which is convenient for performing a return operation of a die or a tool during one rotation of the crankshaft 104.

  Reference numeral 121 denotes an eccentric ring type die moving mechanism (supporting means moving means of the present invention) for reciprocatingly driving the die 102 back and forth. The die moving mechanism 121 includes a die reciprocating drive shaft 122 and a die reciprocating drive shaft 122. An eccentric wheel 124 (the amount of eccentricity = δ ′) and a link 126 having the eccentric wheel 124 rotatably fitted to one end are rotated. The rotation of the die reciprocating drive shaft 122 causes the link 126 to swing. The other end of the link 126 is connected to a die slider (supporting support base of the present invention) 130 via a pin 128, and the die slider 130 is slidable in the directions of arrows b1 and b2 with respect to the machine frame 118 ′. Therefore, the rocking motion of the link 126 reciprocates the die slider 130 provided with the die 102 back and forth. The die reciprocating drive shaft 122 is connected to an air rotary actuator (rotary drive motor of the present invention) 134, and the air rotary actuator 134 moves the die slider 130 back and forth via the eccentric ring 124 and the link 126 to move the die 102 back and forth. It is like that. It is sufficient that the die 102 has a slight back-and-forth movement of, for example, 5 millimeters, which can be advanced or retracted so that the die 102 is joined to or separated from the workpiece before and after the work W by the tool 100 is processed. High speed responsiveness is required due to the requirement to complete all preparatory work during rotation, and an air rotary actuator 134 is employed to move the die 102 back and forth. It is possible to employ other high-speed response type rotary drive motors such as servo motors.

  When the die reciprocating drive shaft 122 is rotated counterclockwise (in the direction of arrow c in FIG. 2) by the air rotary actuator 134, the stopper arm 136 fixed on the die reciprocating drive shaft 122 is engaged with the stopper 138. The die slider 130 moves to the left (arrow b1) in FIG. 1 until the leftmost position of the die slider 130 where the stopper arm 136 contacts the stopper 138, and the center O2 of the die reciprocating drive shaft 122 and the eccentric ring 124 The center O1 and the center O3 of the pin 128 are located on the axis, which is the dead point (left dead point) in the toggle mechanism. In addition, since the position and position are regulated by the stopper arm 136 and the stopper 138, it is possible to receive a large thrust during machining of the workpiece by the tool 100 by the function of the toggle.

  The workpiece position control device 140 has a chuck 142 (work support base of the present invention) for gripping the workpiece W. The jaw portion 142-1 expands and contracts in the radial direction by air pressure or the like so that the thin-walled cylindrical workpiece W is moved to the inner diameter side. And hold it detachably. The chuck 142 that has gripped the workpiece W is rotated about an upright axis (arrow d) by a workpiece rotation movement motor 144, and a support base 146 that supports the workpiece rotation movement motor 144 slidably up and down (arrow e). Are screwed to a ball screw 148, and the ball screw 148 is connected to a workpiece vertical movement motor 154 by a pulley 150 and a belt 152.

  The control circuit 156 controls the servo motor 120, the air rotary actuator 134, the workpiece vertical movement motor 154, and the workpiece rotation movement motor 144. During one rotation of the crankshaft 104, the workpiece 100 is machined and die-cut by the tool 100. 102 is moved and the workpiece W is moved to the next machining position. In the present invention, not only the tool 100 but also the die 102 can be moved back and forth. Therefore, a mechanism for joining or removing the workpiece to or from the die 102 before and after machining by the tool 100 is unnecessary, and workpiece position control is performed. The apparatus 140 functions only for positioning the workpiece W for machining at the next machining site after machining by the tool 100.

  Next, the operation of the apparatus of FIG. 1 will be described with reference to the schematic timing chart of FIG. 3. The tool 100 is positioned at the left dead center position of the crankshaft 104 (crank angle = 0 °) prior to the start of workpiece machining. The die 102 is retracted to the leftmost row position (in the direction of arrow a2), the die 102 is in the position retracted to the rightmost row position (in the direction of arrow b2), and the workpiece W is set so that the part to be machined is facing the tool. Positioning has already been completed by the position controller 140. The rotation of the crankshaft 104 is started to start machining the workpiece W, and the tool slider 116 and the tool 100 start moving forward (right line: arrow a1). The forward movement of the tool 100 toward the workpiece W is indicated by M1 in FIG. The air pressure to the air rotary actuator 134 is switched simultaneously with or slightly after the start of rotation of the crankshaft 104, and the die reciprocating drive shaft 122 rotates in the direction of arrow c in FIG. 2 to move the die slider 130 in the forward direction ( Left line: arrow b1), the die 102 moves forward toward the workpiece W. The forward movement of the die 102 toward the workpiece W is indicated by N1 in FIG. The rotation of the die reciprocating drive shaft 122 in the direction of arrow b in FIG. 2 is stopped when the stopper arm 136 comes into contact with the stopper 138. In FIG. 3B, a state where the die 102 stops at the most advanced position is indicated by N2. The crank angle at which the die 102 stops at the most advanced position is indicated by α1 in FIG. 3. The crank angle at which the tool 100 is at the right dead center is substantially before 180 °, that is, the crank at which the tool 100 processes the workpiece W. The die 102 comes into contact with the workpiece W substantially before the angle, and preparations for machining are completed in cooperation with the tool 100. Since the air rotary actuator 134 responds at a high speed, the die 102 can be quickly moved to a position in contact with the workpiece before the tool reaches the most advanced position (crank angle = 180) at which the workpiece is processed. .

  In the vicinity of the most advanced position (right-side dead center position of the crank mechanism 103) of the tool slider 116 in which the crankshaft 104 rotates 180 degrees, the tool 100 processes the workpiece W (piercing or cutting) in cooperation with the die 102. . A large thrust applied to the die 102 during processing by the tool 100 can be received by the function of the toggle mechanism.

  When the crankshaft rotation angle exceeds 180 degrees, the tool 100 starts a backward movement (left line (arrow b2) in FIG. 1), and the backward movement of the tool 100 is represented by M2 in FIG. As the tool 100 starts to move backward, the air pressure to the air rotary actuator 134 is switched, the die reciprocating drive shaft 122 rotates in the clockwise direction in FIG. 2 (the direction opposite to the arrow c), and the die 102 is in the most advanced position. (The crank angle at which the die 102 starts to move backward is indicated by α2 in the timing chart of FIG. 3). This backward movement from the most advanced position of the die 102 is indicated by N3 in FIG. When the die 102 is retracted from the most advanced position and retracted by a stroke of, for example, 5 mm sufficient to separate the die 102 from the workpiece W (an angle of about 90 ° with respect to the rotational angle of the die reciprocating drive shaft 122), it is built in the air rotary actuator 134. Further rotation is restrained by the stopper, and the air rotary actuator 134 is stopped. The crank angle at which the air rotary actuator 134 stops is indicated by α3, and the stop state of the air rotary actuator 134 after this crank angle is indicated by N4 in FIG. Since the air rotary actuator 134 responds at a high speed, the die 102 can be moved to a position where it comes into contact with the workpiece before the tool reaches the most advanced position (crank angle = 180) at which the workpiece is processed. The high-speed operation of the air rotary actuator 134 can sufficiently precede the return to the origin position of the crankshaft (crank angle = 360 degrees), thereby allowing the die 102 to be quickly retracted.

  After the air rotary actuator 134 is stopped, the tool 100 is sufficiently separated from the workpiece W, and the workpiece W toward the next machining site in the region of the crank angle of α4 to α5 after the retreat of the die 102 is confirmed. Positioning is performed. The period of the positioning operation of the workpiece W is indicated by Q in FIG. That is, when it is confirmed that the die 102 is retracted and the tool 100 is charged / separated from the workpiece W, the control circuit 156 sends control signals to the workpiece vertical movement motor 154 and the workpiece rotation movement motor 144. The height position (arrow e) and the rotation position (arrow d) of the workpiece W are controlled, and the workpiece W is directly opposed to the tool 100 and the die 102 at a site to be subjected to the next machining. The workpiece W can be moved at high speed by the rotary servo motors 144 and 154, and when a number of parts of the workpiece W are drilled or cut, the workpiece positioning amount itself to the next machining position is Therefore, the workpiece positioning operation can be completed with a sufficient margin until the crankshaft 104 returns to the home position. Further, by using the servo motor 120 to drive the crankshaft 104, the position of the crankshaft 104 can always be accurately grasped by the crankshaft position control signal (number of drive pulses), and the die 102 is moved back and forth. It can be advantageously used for positioning control of workpieces.

  Then, when the crankshaft 104 makes one rotation and returns to the left dead center (origin position), 104 returns to the top dead center, and at this position where the crank angle = 360 degrees, the crankshaft 104 is temporarily stopped for the next machining. Wait for start command. Alternatively, it is also possible to continuously move to the next part without stopping at the left dead center position.

  As described above, in the workpiece machining apparatus according to the present invention, the tool 100 and the die 102 are advanced during one rotation of the crank mechanism 103 driven by the servo motor 120, and the workpiece W between the tool 100 and the die 102 is moved. Since the machining, the tool 100 and the die 102 are retracted, and the movement of the workpiece W toward the next machining position can be restored, all the steps for machining the workpiece can be completed. Significant speedup can be realized when performing a machining operation at a machining site.

  4 to 16 show a workpiece machining apparatus according to an embodiment of the present invention. The workpiece machining apparatus includes a table 10, a thrust generating unit 12, a thrust receiving unit 14, and a workpiece gripping unit 16. Consists of

  The thrust generating unit 12 includes a punch slide table 18 for attaching a tool such as a punch, and the punch slide table (tool support base of the present invention) 18 is reciprocally slidable linearly on a table guide 20 on the table 10. Provided. The punch slide table 18 is given a reciprocating motion in a linear direction by an eccentric ring crank mechanism (the tool moving means of the present invention). The eccentric ring type crank mechanism will be described. A rotating shaft 22A of a servo motor 22 (FIGS. 8 and 10) is connected to a speed reducer 26 via a timing pulley 23 and a timing belt 24. As shown in FIG. 7, the output side of the speed reducer 26 is connected to a crankshaft 28, and the crankshaft 28 is connected to a connecting rod 32 via an eccentric ring 30 that is eccentric by δ with respect to the crankshaft 28. By one rotation of the shaft 28, the connecting rod 32 swings back and forth by an eccentric amount δ. The connecting rod 32 is connected by a pin 35 to a sliding member 34 that slides on the table guide 20, and the sliding member 34 is connected to the punch slide table 18 through an overload prevention mechanism having a disc spring 36. . The disc spring 36 is disposed between the flange 37-1 of the connecting shaft 37 extending from the sliding member 18 and the sliding member 34, and is compression-fastened by a nut 33 with a predetermined load. Therefore, the rotational movement of the crankshaft 28 is transmitted to the punch slide table 18 via the connecting rod 32 via the sliding member 34 and the connecting shaft 37, and the tool on the punch slide table 18 is moved back and forth by the eccentric amount δ (arrow a1). , a2 direction), and the tool can apply thrust to the workpiece while going forward. The disc spring 36 can bend when a predetermined load is exceeded. When an unexpected load is generated near the bottom dead center of the crankshaft 28, the disc spring 36 is bent to cause the punch, die, or apparatus main body to be bent. Can be protected.

    Next, the configuration of the thrust receiving portion 14 will be described. A die slide table (supporting support base) 38 for mounting a die (receiving tool of the present invention) that receives thrust from a tool such as a punching punch is a table guide 20. It is provided to be slidable in a linear direction on the top. The die slide table 38 is connected to an eccentric reciprocating drive mechanism (the support moving means of the present invention), and before and after the workpiece is processed by the cooperation of the tool on the punch slide table 18 and the die on the die slide table 38. The table 38 can be advanced and retracted. The reciprocating drive mechanism will be described. The link pin 40 connected to the die slide table 38 is connected to a die slide table reciprocating drive shaft 46 via a link 42 and an eccentric ring 44, and the die slide table reciprocating drive shaft 46 is This is connected to an air rotary actuator 48 for reciprocating a predetermined angle of about 90 degrees. The die slide table reciprocating drive shaft 46 is eccentric by δ ′ (FIG. 7) with respect to the eccentric ring 44, and the rotation of the die slide table reciprocating drive shaft 46 is performed via the eccentric ring 44 and the link 42. Fold back and forth (in the direction of arrows b1 and b2). At the most advanced position of the drive shaft 46 for reciprocating the die slide table, a tool such as a punching punch on the punch slide table 18 processes a workpiece with the die, and receives a toggle type thrust force for receiving the thrust at this time. A stop mechanism is configured. The toggle thrust receiving mechanism will be described. When the rotary shaft 48A of the air rotary actuator 48 is rotated counterclockwise (arrow c direction) in FIG. 12, the pin 40 and the die slide table 38 are directed toward the dead center position. The eccentric ring 44 is moved forward (leftward in FIG. 7), the eccentric direction of the eccentric ring 44 is horizontally leftward, and the center of the eccentric ring 44 is on the horizontal axis line connecting the center of the die slide table reciprocating drive shaft 46 and the center of the pin 40. When reaching the dead center or a position slightly rotated from the dead center in the direction of arrow c in FIG. 12, a stopper arm 50 provided on the drive shaft 46 for reciprocating the die slide table is provided with a stopper 52 installed on the machine frame. The contact is made with a pressing force corresponding to the air pressure, and further rotation of the drive shaft 46 for reciprocating the die slide table is prevented. At the dead center position, the toggle mechanism can theoretically receive an infinite thrust, and the maximum thrust generated when a workpiece such as a punch is processed can be received by the die on the die slide table 38. When the workpiece machining by the tool is completed, the air pressure applied to the air rotary actuator 48 is switched in the opposite direction, and the die slide table reciprocating drive shaft 46 is urged to rotate clockwise (in the direction opposite to the arrow c) in FIG. Since the rotation in this direction is a direction in which the stopper arm 50 is moved away from the stopper 52, the die slide table reciprocating drive shaft 46 is not obstructed, so the die slide table 38 is moved in the right direction (arrow b2 direction) in FIG. It is made to retreat. In order to set the last retracted position, a stopper (not shown) is built in the air rotary actuator 48, and the air rotary actuator 48 rotates back and forth by about 90 °, so that the die slide table 38 has a stopper arm 50 and a stopper 52. It is possible to move between the most advanced position where it abuts and the last retracted position determined by a stopper built in the air rotary actuator 48. This movement amount (retraction movement amount) of the die slide table 38 can secure a movement amount necessary for preventing damage due to contact with the die during the positioning operation of the workpiece W. When the die slide table 38 is moved backward, thrust is not substantially applied to the die. However, in the present invention, it is necessary to complete the backward movement in the middle of the second half rotation from the bottom dead center in one rotation of the crankshaft, and high speed operation is possible. A pneumatic rotary actuator 48 that moves by air pressure is combined with an eccentric mechanism composed of a link pin 40, a link 42, and an eccentric ring 44. Further, the rotation operation is easy to lubricate and is advantageous from the viewpoint of durability.

  A known endless track ball 20 ′ is provided between the punch slide table 18 and the die slide table 38 and the table guide 20, and smooth movement of the punch slide table 18 and the die slide table 38 on the table guide 20 is obtained. It is supposed to be.

  It is possible to use a servo motor capable of high-speed response instead of the air rotary actuator 48 for driving the die slide table 38.

  Next, the workpiece gripping portion 16 will be described. In this embodiment, the workpiece W is a cylindrical panel made of a thin metal plate (see FIG. 6 and FIG. 13 or FIG. 15 for the cylindrical shape of the workpiece W). It is held down by the chuck 62. As shown in FIG. 14 or FIG. 16, the panel chuck 62 is provided with a plurality of gripping jaws 62-1 at the lower end at intervals in the circumferential direction, and each gripping jaw 62-1 contracts radially inwardly. It is possible to move between the position and the radially expanded position by air pressure or the like, and a cylindrical workpiece W is introduced to the outer peripheral side at the radially inwardly contracted position of the gripping jaw 62-1 to Thus, the workpiece W can be held at the upper end of the inner diameter by expanding the gripping jaw 62-1 radially outward. As shown in FIGS. 4 and 5, the panel chuck 62 is rotatably supported by a panel rotary bearing body 64 and is connected to a work rotation drive motor 66 via a timing belt 63 and a pulley 65, and the work rotation drive motor. 66, the workpiece W can be rotated (in the direction of arrow d in FIGS. 13 and 15). The panel chuck 62 is attached to an elevating table 68, and the elevating table 68 is freely attached up and down (in the direction of arrow e in FIG. 4) to both columns 70. The lifting table driving ball screw 72 is engaged with the lifting table 68 and the end of the ball screw 72 is connected to the lifting table driving servo motor 76 via the timing pulley 73 and the timing belt 74. Therefore, the rotary motion of the rotary shaft of the lift table driving servo motor 76 is converted into the vertical motion (arrow e) of the lift table 68 by the ball screw 72, and the workpiece W can be lifted and lowered.

  FIGS. 13 and 14 show tooling in the case of drilling a cylindrical panel as a workpiece W, and a punch mounting tool 77D is bolted onto the punch slide table 18 via mounting pieces 77A, 77B, 77C. The punching punch 78 is mounted on the punch mounting tool 77D, and the position of the punching punch 78 can be finely adjusted by the long hole 77B-1 of the wedge-shaped mounting piece 77B. A die 80 for punching is provided on the die slide table 38. Similarly, a die attachment tool 81D is bolted to the die slide table 38 via attachment pieces 81A, 81B, 81C. A die 80 is attached, and the position of the die 80 can be finely adjusted by the long hole 81B-1 of the wedge-shaped attachment piece 81B. The cylindrical panel as the workpiece W is punched at a predetermined position by the cooperation of the punching punch 78 and the die 80. When the part of the workpiece W is punched by the punching punch 78, after the punch 78 and the die 80 are retracted, the workpiece gripping portion 16 positions the workpiece W to the next workpiece, and the workpiece is processed in the same process. Is perforated, and by repeating this, a large number of openings can be made all around.

  FIG. 15 and FIG. 16 show tooling in the case of performing end face cutting on a cylindrical panel as a workpiece W. A cut punch 82 is provided on the punch slide table 18 and a cutting is performed on the die slide table 38. A die 84 is provided, and the end face of the cylindrical panel as the workpiece W is cut by the cooperation of the cut punch 82 and the die 84. When the end face of the part of the work W is cut by the cut punch 82, after the punch 82 and the die 84 are retracted, the work W is rotated by the work gripping part 16 to the next work part (arrow d in FIG. 15). End face cutting is performed, and this is repeated to cut the entire circumference.

  As shown in FIG. 7, the center line L1 of the connecting rod 32 and the center line L2 of the die slide table reciprocating drive mechanism have substantially the same height, and the heights of these center lines L1 and L2 are the same. The height position of the tool mounted on the punch slide table 18, that is, the height position of the punch punch 78 (FIG. 14) or the cut punch 82 (FIG. 16) and the state mounted on the die slide table 38. Substantially coincide with the height of the die 80 (FIG. 14) or 84 (FIG. 16). For this reason, the offset load from the punch slide table 18 and the die slide table 38 to the table guide 20 at the time of sliding is substantially not generated or minimized, and the guidance of the punch slide table 18 and the die slide table 38 with the table guide 20 is reduced. Therefore, by using the above-mentioned endless track ball, it is possible to control with high accuracy and realize a dramatic improvement in the punch and die life.

  Hereinafter, the operation of the machining apparatus according to the present invention will be described in the case where a workpiece is drilled by tooling shown in FIG. In the present invention, the work at one machining part (drilling part) of the workpiece is completed by one rotation of the crankshaft 28 in the thrust generating unit 12. FIG. 17 illustrates the timing of each operation during one rotation (360 ° rotation) of the crankshaft 28. The top dead center of the crankshaft 28 is indicated by TDC and the bottom dead center is indicated by BDC. At the top dead center angle position TDC, the crankshaft 28 is temporarily stopped. At this top dead center position, the punch slide table 18 is in the retracted position (the leftmost line position in FIG. 14). The lift table 68 is lowered to a predetermined height position by the lift table driving servo motor 76, and the work rotation drive motor 66 is rotated so that the next processing position of the work is opposed to the punching punch 78. The die slide table 38 is at the last retracted position (position moved to the right in FIG. 14) by the air rotary actuator 48.

  From the stopped state at the top dead center, the servo motor 22 starts rotating (arrow A in FIG. 17), rotates the crankshaft 28, and the punch slide table 18 starts rightward (arrow a1) in FIG. On the other hand, air pressure is applied to the air rotary actuator 48 simultaneously with the start of rotation of the servo motor 22, and rotation of the rotation shaft 48A is started. This rotation direction rotates the die slide table reciprocating drive shaft 46 counterclockwise in FIG. Direction (arrow c direction). The die slide table 38 starts the left line (arrow b1) in FIG. 14 by the eccentric mechanism composed of the eccentric ring 44. When the stopper arm 50 on the die slide table reciprocating drive shaft 46 engages with the stopper 52, the stopper arm 50 is brought into contact with the stopper 52 under air pressure, and further counterclockwise rotation is restricted. The eccentric ring 44 is located in a position where the eccentric direction is a horizontal left dead center position or a position slightly beyond the dead center position, and it is confirmed that the die slide table 38 is at this front end position. 17 is performed at a crank angle position α in FIG. The crank angle can be grasped by the number of drive pulses of the servo motor 22 that drives the crankshaft 28.

  A little before the bottom dead center BDC of the crankshaft 28, the punching punch 78 cooperates with the die 80 to start punching of the cylindrical panel as the workpiece W. At this time, the thrust of the punching punch 78 tries to retract the die 80, but the stopper arm 50 fixed to the reciprocating drive shaft 46 for reciprocating the die slide table engages with the stopper 52 on the frame side. Since the eccentric direction of 44 is on the line connecting the pin 40 and the shaft 46 or at a position slightly rotated from this, the die 80 can receive a large thrust during drilling by the drilling punch 78.

  When the crankshaft 28 passes the bottom dead center angle position BDC, the die slider table 18 starts retreating on the table guide 20 (the left line in FIG. 7 and FIG. 14 (moving in the direction of arrow a2)), and the punch 78 moves the workpiece W. Retracted away from. Upon detecting that the crankshaft has passed the bottom dead center angle BDC, the direction of air pressure application is switched to the air rotary actuator 48, the rotation direction of the rotary shaft 48A is reversed, and the die slider table 38 is shown in FIGS. Start the right line (move in the direction of arrow b2). The reciprocating motion of the die slide table 38 is performed by a mechanism including an air rotary actuator 48 and an eccentric ring 44 connected to the air rotary actuator 48. Since the die slide table 38 can be operated at high speed, the crankshaft 28 is slightly overly angled from the bottom dead center. The die slide table 38 can be retracted in a very short time for rotation. As a result of the continued rotation of the crankshaft 28, the arrival of the punch slide table 18 at a position where there is no hindrance to the next machining positioning operation of the workpiece is confirmed in the vicinity of the crank angle β that is too low at the bottom dead center. At the same time, it is confirmed that the die slide table 38 has moved back to a position that does not interfere with the next positioning operation of the workpiece, in other words, that the die has been separated from the workpiece W. That is, the logical product (AND) of the signal from the sensor indicating that the die slide table 38 has moved back to the predetermined value and the crank angle signal is taken, and when the AND condition is satisfied, the machining of the next machining part of the workpiece is performed. The workpiece W is rotated and / or moved up and down by the workpiece rotation drive motor 66 and the lift table drive servo motor 76 so that the next machining position of the workpiece W reaches the machining center line. Can be.

  In this way, all preparations for the next drilling process can be completed before the crankshaft 28 returns to the top dead center angle position TDC. In this embodiment, the crankshaft 28 is temporarily stopped at the top dead center angle position TDC. However, by continuously rotating the crankshaft 28, it is possible to perform a drilling operation at a series of parts of the workpiece W.

  As described above, according to the present invention, the die slide table 38 is moved forward and backward during one rotation of the crankshaft for moving the punch slide table 18 carrying tools such as punches 78 and 82 for machining the workpiece back and forth. The operation for positioning the workpiece W by the workpiece gripping portion 16 at the next machining position is performed in a so-called reversion operation. Therefore, as before, before and after hydraulic punching, workpiece separation from the die, and positioning of the workpiece to the next position are performed in sequence control to wait for the completion of one operation and perform the next operation. Compared to the above, it is possible to realize a machining operation at a remarkably high speed of a fraction.

  Further, the apparatus of this embodiment has a very compact front shape as shown in FIG. 5 and the like, and the panel as a workpiece is subjected to various processing in addition to the processing by the apparatus of the present invention. The device of the invention is provided with other devices, and the workpiece needs to be transferred between the devices. However, the device of the invention has a small front dimension, and is excellent from the viewpoint of saving space and reducing the burden on the transfer means.

  As described above, by adopting the technology of the present invention, it has become possible to perform processing that has conventionally been performed for a plurality of machines with one machine, and it is possible to significantly extend the life of consumable punches and dies. By reducing the size, it is possible to save the installation space, realize a significant space saving, and contribute to resource saving.

FIG. 1 is a schematic plan view of a workpiece machining apparatus according to the present invention represented by a principle configuration. FIG. 2 is a schematic cross-sectional view showing a stopper mechanism for a die reciprocating drive shaft. FIG. 3 is a timing chart for explaining the operation of the workpiece machining apparatus shown in FIG. FIG. 3 is a side view of the workpiece machining apparatus of the present invention realized as a specific apparatus. FIG. 5 is a front view of the workpiece machining apparatus shown in FIG. 4 (viewed from the direction V in FIG. 4). FIG. 6 is a plan view of the workpiece machining apparatus in FIG. 4 (viewed from the VI direction in FIG. 4). FIG. 7 is a side view of the workpiece machining apparatus of the present invention similar to FIG. 4, but the workpiece holding portion is not shown in order to clarify the configuration of the punch slider table. FIG. 8 is a rear view of the workpiece machining apparatus in FIG. 7 (a view seen from the direction VIII in FIG. 7). FIG. 9 is a plan view of the workpiece machining apparatus of FIG. 7 (viewed from the IX direction of FIG. 7). FIG. 10 is a plan view of the drive unit of the servo motor (shown from the X direction in FIG. 8). FIG. 11 is a plan view of the servomotor as viewed from the XI direction in FIG. 9. 12 is a cross-sectional view taken along line IX-IX in FIG. FIG. 13 is a plan view showing tooling in the case of drilling a cylindrical panel. FIG. 14 is a plan view of FIG. FIG. 15 is a plan view showing tooling when an end face is cut on a cylindrical panel. FIG. 16 is a plan view of FIG. FIG. 17 is a crank angle diagram for explaining the operation of the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Tool 102 ... Die 103 ... Crank mechanism 104 ... Crankshaft 106 ... Eccentric ring 108 ... Connecting rod 116 ... Tool slider 120 ... Servo motor 121 ... Die moving mechanism 122 ... Die reciprocating drive shaft 124 ... Eccentric ring 126 ... Link 130 ... Die slider 134 ... Air rotary actuator 136 ... Stopper arm 138 ... Stopper 140 ... Work position control device 142 ... Chuck 144 ... Work rotation movement motor 146 ... Support base 148 ... Ball screw 154 ... Work vertical movement motor 156 ... Control circuit

Claims (5)

A slidable tool support for supporting the tool, a slidable support support for supporting the support, a work support for supporting the work, and its rotating shaft are continuously rotated. A rotary drive motor, a crank mechanism that converts the rotational movement of the rotary shaft of the rotary drive motor into a reciprocating motion in the linear direction of the tool support base, and a reciprocating movement of the support base to move the support back and forth with respect to the workpiece. A receiving means moving means and a work moving means for moving a work supporting base to move the work between processing parts. During one revolution of the crank mechanism , the receiving tool moving means advances the receiving tool , and the receiving tool advances. machining of the workpiece by the tool on the tool support base after retraction of the bracket as by receiving fixture moving means after work machining, all complete transfer of the workpiece to the next processing position by the workpiece moving means after retraction of receiving fixture And times Work machining apparatus characterized by performing a series of machining of the workpiece without stopping the drive motor. 2. The workpiece machining apparatus according to claim 1 , wherein the rotation drive motor is a servo motor.   3. The workpiece machining apparatus according to claim 1, wherein the receiver moving means for moving the receiver back and forth comprises a toggle mechanism having a rotation drive source. A slidable tool support for supporting the tool, a slidable support support for supporting the tool, a work support for supporting the work, and moving the tool relative to the work A tool moving means for moving the tool support base and a support base for moving the work piece back to the work site after moving the work piece to the next machining site after moving the work piece with the tool. A workpiece processing apparatus comprising: a receiver moving means for moving; and a workpiece moving means for moving a workpiece support to move the workpiece to the next machining site after the receiver has moved backward from the workpiece. allowed to bracket as moving means is constituted by a toggle mechanism having a rotary drive source, the rotary drive source of the toggle mechanism is characterized in that it is provided separately from the rotary drive motor for the bracket as moving means Over click processing equipment. In the invention according to any one of claims 1 to 4, a center line in the reciprocating direction of the tool support base, a center line of the tool, a center line in the reciprocating direction of the support supporting base, A workpiece machining apparatus in which the center line is positioned substantially on a straight line.

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