JP2007167935A - Pressing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressing device capable of forming a projection or forming a through hole by one punch at a predetermined place of a work to be punched out from a material to be pressed while suppressing complication of a configuration of a pressing device itself. <P>SOLUTION: The pressing device is provided with a working unit 13A having a punch 19A and a die 15A, and the punch 19A of the working unit 13A is composed of a first punch 50 and a second punch 51 shorter than the first punch 50. When an upper die 17 (the punch 19A) is lowered by the first stroke length DST1, a shaft hole and a plurality of magnet insertion holes are punched by the first punch 50, and a projection 28A is half-punched by the second punch 51. When the upper die 17 is lowered by the second stroke length DST2, a shaft hole and a plurality of magnet insertion holes are punched by the first punch 50, and a circumferential hole 28 is punched by the second punch 51. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a press working apparatus.

  In general, a press working apparatus forms a workpiece by punching a press material (for example, a steel sheet) disposed between them with a punch and a die having a male and female relationship. When a plurality of workpieces thus formed are sequentially stacked to form a laminated body, the punching device (second punch) is added to the punching device in addition to the punch for punching (first punch). ) And a projection is formed at a predetermined position of the workpiece punched from the press material by the second punch. Therefore, a convex portion is formed on the back surface side of the workpiece on which the protrusion is formed, while a concave portion having a shape corresponding to the convex portion on the back surface side is formed on the front surface side of the workpiece.

  When a plurality of workpieces are sequentially stacked, the workpieces adjacent to each other in the stacking direction are pressed in the stacking direction, so that the convex portion of one workpiece is fitted and fixed to the concave portion of the other workpiece. Thus, a laminated body is formed. After that, when the number of stacked workpieces reaches a predetermined number set in advance, or when the thickness of a laminated body composed of a plurality of workpieces reaches a predetermined thickness set in advance, the workpiece to be punched from the press material is then A through hole is formed by a second punch at a predetermined location (for example, Patent Document 1).

  The press working apparatus described in Patent Document 1 includes a changing mechanism that allows the vertical position of the top dead center in the second punch to be changed without changing the vertical position of the top dead center in the first punch. Yes. That is, the change mechanism is provided with a slide plate that contacts the upper end of the second punch and an actuator for moving the slide plate forward and backward in a direction substantially perpendicular to the moving direction of the second punch. Further, a concave portion having a shape capable of accommodating the upper end portion of the second punch is formed on the side of the slide plate that contacts the second punch.

For this reason, when the upper end of the second punch is in contact with the bottom surface of the recess, the top dead center of the second punch moves upward. Projections are formed on the workpiece by half-cutting the position. On the other hand, when the upper end portion of the second punch is in contact with the non-formed portion of the concave portion of the slide plate, the top dead center of the second punch moves downward. Sometimes, a through hole is formed in the workpiece by punching a predetermined position of the workpiece.
JP 7-115756 A (paragraph numbers [0010], [0011])

  By the way, in the press working apparatus described in Patent Document 1, the upper part of the second punch is moved by moving the slide plate in accordance with each case of forming a protrusion at a predetermined position of the work and forming a through hole. The vertical position of the dead center is changed. However, when the change mechanism for making only the top dead center of the second punch movable is provided in this way, there is a problem that the configuration of the press working apparatus itself becomes complicated.

  The present invention has been made in view of such circumstances, and its purpose is to use a single punch for a predetermined portion of a workpiece to be punched from a press material while suppressing the complexity of the configuration of the apparatus itself. An object of the present invention is to provide a press working apparatus capable of forming protrusions and forming through holes.

  In order to achieve the above-mentioned object, the invention according to claim 1 according to the press working apparatus is arranged such that a press material is disposed between the punch and the die, and the punch and the die are arranged along a punching direction with respect to the press material. A press working device for punching the press material by relative movement, wherein the first punch is disposed such that a distance between the die and the opposing die is a predetermined distance, and the first punch A second punch that is disposed so that a distance between the pressing material and the die facing the die is longer than the first punch when the pressing material is opposed to the die; and When each of the punches is formed by half punching by the second punch at a predetermined position of a workpiece to be punched from the press material, the driving means for relatively moving each punch and the die In the case where the driving means is controlled so that the relative movement distance between the punch and the die becomes the first distance, and when the through hole is punched and formed at the predetermined position by the second punch, the punch and the die And a control means for controlling the driving means so that the relative movement distance is a second distance longer than the first distance.

  The invention according to claim 2 is the press working apparatus according to claim 1, wherein the first working unit for punching the scrap material from the press material, and the press material fed forward from the first working unit, A second machining unit for punching a workpiece, wherein each punch is provided in the first machining unit, and scrap material is punched from the press material by the first punch, and the second punch The protrusion or the through hole is formed at a predetermined position, and the second processing unit is provided with only the first punch among the punches, and a workpiece is punched from the press material by the first punch. The gist of the invention is that the relative movement of each punch and die in the machining unit is simultaneously performed by the driving means.

  Invention of Claim 3 has the die hole in which the said workpiece | work punched out from the said press material is laminated | stacked sequentially in the press processing apparatus of Claim 1 or Claim 2, and in this die hole Measuring means for measuring the number of the stacked workpieces or the thickness of the laminate composed of the workpieces, and whether or not the number of the workpieces measured by the measuring means has reached a predetermined number, or Determination means for determining whether or not the thickness of the laminated body is equal to or greater than a predetermined thickness set in advance, and the control means is configured to determine whether each of the punches is negative when the determination result by the determination means is negative. The drive means is controlled so that the relative movement distance between the die and the die becomes the first distance, and when the determination result by the determination means is affirmative, the relative movement between each punch and the die Away it is summarized in that for controlling the drive means such that the second distance.

  According to a fourth aspect of the present invention, a press material is disposed between a punch and a die, and the punch and die are relatively moved along a punching direction with respect to the press material, thereby punching the press material. A press working device for applying a first punch disposed so that a distance between the opposing dies is a predetermined distance, and when the first punch is opposed to the die across the press material A second punch disposed so that a distance between the press die and the die opposed to each other is longer than that of the first punch, and driving means for relatively moving the punch and the die. A position changing means for changing the positions of the punches in the punching direction, and a half punching of the protrusion by the second punch at a preset predetermined position of the workpiece punched from the press material In the case of forming, each of the punches and the die are moved relative to each other by the driving means after controlling the position changing means in order to set the position in the punching direction of each punch to the first position set in advance. When a through hole is punched and formed at a predetermined position by the second punch, the position change is performed so that the positions of the punches in the punching direction are both closer to the die than the first position. The gist of the present invention is that it comprises control means for moving the punches and the die relative to each other by the driving means after controlling the means.

  The invention according to claim 5 is the press working apparatus according to claim 4, wherein the first working unit for punching the scrap material from the press material, and the press material fed forward from the first working unit, A second machining unit for punching a workpiece, wherein each punch is provided in the first machining unit, and scrap material is punched from the press material by the first punch, and the second punch The projection or the through hole is formed at a predetermined position, and the second machining unit is provided with only the first punch among the punches, and the workpiece is punched from the press material by the first punch. And

  Invention of Claim 6 has the die hole in which the said workpiece | work punched out from the said press material is laminated | stacked sequentially in the press processing apparatus of Claim 4 or Claim 5, and in this die hole Measuring means for measuring the number of the stacked workpieces or the thickness of the laminate composed of the workpieces, and whether or not the number of the workpieces measured by the measuring means has reached a predetermined number, or Determination means for determining whether or not the thickness of the laminated body is equal to or greater than a predetermined thickness set in advance, and the control means is configured to determine whether each of the punches is negative when the determination result by the determination means is negative. The position changing means is controlled to place the punch at the first position, and when the determination result by the determination means is affirmative, the position is set to place the punches at the second position. And summarized in that to control the further means.

  A seventh aspect of the present invention is the press working apparatus according to any one of the fourth to sixth aspects, wherein the driving means is configured to also serve as the position changing means. To do.

  According to the present invention, a protrusion or a through hole is formed by a single punch for a predetermined portion of a workpiece punched from a press material while suppressing the complication of the configuration of the apparatus itself. Can do.

(First embodiment)
Hereinafter, a first embodiment in which the present invention is embodied in a progressive press working apparatus used when stamping and forming a rotor core plate and a stator core plate will be described with reference to FIGS. In the following description of the present specification, “vertical direction” and “horizontal direction” indicate the vertical direction and horizontal direction in FIG. 1, respectively.

  As shown in FIG. 1, in the progressive press working apparatus 11 of the present embodiment, a plurality of processing units 13 </ b> A, 13 </ b> B, 13 </ b> C, 13 </ b> D are disposed in a predetermined direction (FIG. 1) on a base plate 12. In the horizontal direction). These processing units 13A to 13D are basically units having substantially the same structure, and the lower die 14 is supported on the base plate 12, and the die 15 (15A, 15B, 15C) is provided on each lower die 14. , 15D) are fixedly mounted. In addition, columnar columns 16 are erected at four corners on each lower mold 14.

  An upper die 17 is supported in an upper region of each lower die 14 so as to be vertically movable through each column (16 columns in this embodiment) 16 provided upright on each lower die 14. On the upper surface side of the upper mold 17, the upper mold 17 (and the punch 19) is moved in a stroke between the top dead center position and the bottom dead center position based on a control signal from the control device (control means) 18. A hydraulic cylinder (drive means) 20 is provided. On the other hand, on the lower surface side of the upper die 17, as shown in FIG. 3A, a punch 19 (19A, 19B, 19C, 19D) is backing so as to face the die 15 (15A, 15B, 15C, 15D). Each is fixedly attached via a plate 21. Further, a stripper 22 is attached to the lower surface side of the backing plate 21 via a coil spring 23 so as to surround the punch 19.

  When the sequential press machine 11 is in operation, a sheet-like press material 24 is disposed between the punch 19 (19A to 19D) and the die 15 (15A to 15D), and between the processing units 13A to 13D from the upstream side. The feed is intermittently advanced downstream (from left to right in FIG. 1). The press material 24 is, for example, a steel sheet sheet that has been cold-rolled to a thickness of about 0.3 mm, and the predetermined punched portions shared by the processing units 13A to 13D of the progressive press processing apparatus 11 are each processing unit 13A. Punching or half punching is performed by a punch 19 and a die 15 of ˜13D. Therefore, each punch 19 (19A to 19D) and each die 15 (15A to 15D) equipped in each processing unit 13A to 13D have a shape corresponding to a punched portion from the press material 24 in each processing unit 13A to 13D. A blade portion (not shown) is formed on the surface.

  FIG. 2 shows the punching layout of the processing units 13A to 13D for the press material 24 in the order of the punching process (that is, the order of the processing units 13A → 13B → 13C → 13D). As can be understood from the figure, a plurality of pilot holes 25 are formed at both side edges in the width direction of the press member 24 at regular intervals in the length direction. Each of these pilot holes 25 is normally drilled in the first punching process for the press material 24, and in the present embodiment, a predetermined position located further upstream than the leftmost (upstream) processing unit 13A. Are drilled by a machining unit (not shown).

  Then, the press material 24 is intermittently forwarded in a state slightly lifted upward from each die 15 (15A to 15D), and is lowered from the lifted state at the time of the punching process to be below each processing unit 13A to 13D. A pilot hole 25 is engaged with a pilot pin (not shown) provided in the mold 14. Therefore, the press material 24 is in a positioning stop state when the pilot hole 25 is engaged with the pilot pin, and a required punching process is performed in the stop state.

Then, next, the content of the punching performed in each process unit 13A-13D of the progressive press processing apparatus 11 comprised as mentioned above is demonstrated in order of a process, referring FIG.
Now, among the four steps S1 to S4 shown in FIG. 2, the step S1 and the step S2 are steps for punching a rotor core plate (indicated by reference numeral 30 in the step S2) as a workpiece, while the steps S3 and S2 are performed. Step S4 is a step of punching a stator core plate (indicated by reference numeral 38 in step S4) as a workpiece.

  First, in step S1 in the processing unit 13A, as a result of the scrap material 26 being punched from the press material 24 by the punch 19A and the die 15A, the press material 24 has one shaft hole 27 and a plurality of peripheral holes (through holes) 28 and a plurality of holes. The magnet insertion hole 29 is punched. In addition, projections 28 </ b> A may be formed at the formation sites of the peripheral holes 28 in the press material 24, not through holes (peripheral holes 28), by half punching of a punch (second punch 51 described later). . When the punching process in step S1 is completed, the press material 24 is lifted again, and the pilot hole 25 is disengaged from the pilot pin. Therefore, movement in the forward feed direction (downstream direction) is allowed. Then, the press material 24 moves so that the portion where the shaft hole 27 and the like are punched is positioned in the next processing unit 13B.

  Then, in step S2 of the processing unit 13B, the punch 19B and the die 15B are used to punch out the circular holes 31 that define the outer diameter of the rotor core plate 30 outside the magnet insertion holes 29. That is, the rotor core plate 30 is punched from the press material 24 by punching the circular holes 31 in this step S2, and the punched rotor core plate 30 is continuously formed from the die 15B to the lower die 14 and the base plate 12. They fall into the die holes 48 and are sequentially stacked. The laminated rotor core plates 30 are collected in a laminated state via a take-out port (not shown). Therefore, in the present embodiment, the processing unit 13A arranged on the leftmost side functions as the first processing unit, and the processing unit 13B arranged second from the left functions as the second processing unit. .

  On the other hand, the press material 24 from which the rotor core plate 30 has been punched in step S2 is lifted again, and moves so that the portion from which the rotor core plate 30 has been punched is positioned in the next processing unit 13C. Then, in step S3 in this processing unit 13C, the punch 19C and the die 15C are used to define an inner circumferential arc portion 32 that defines the inner diameter of the stator core plate 38, a plurality of slots 33 along the inner circumferential arc portion 32, A plurality of arc holes 34 along the outer diameter of the stator core plate 38 and a plurality of bolt holes 35 positioned between predetermined arc holes 34 are punched. The inner circumferential side arc portion 32 defines the inner diameter of the stator core plate 38 and is therefore slightly larger in diameter than the circular hole 31 that defines the outer diameter of the rotor core plate 30. Each arc hole 34 is punched out so as to be spaced apart on a concentric circle, and the inner peripheral edge thereof becomes an outer peripheral arc portion 34 a that defines the outer diameter of the stator core plate 38.

  When the punching process in step S3 is completed, the press material 24 is lifted again and moved so that the portion where the arc hole 34 or the like is punched is located in the next processing unit 13D. Then, in step S4 in the machining unit 13D, the punch 19D and the die 15D are used to form a gap between the inner peripheral edges of the respective arc holes 34 (that is, the outer peripheral arc portion 34a that defines the outer diameter of the stator core plate 38). The ear portion 36 and the welded portion 37 positioned so as to be connected are punched. Specifically, the ears 36 are punched at locations where the bolt holes 35 are formed (3 in this embodiment), and the welds 37 are punched at other locations (6 in this embodiment). The

  The outer edge of the stator core plate 38 is defined by the ear 36, the weld 37, and the outer peripheral arc 34a which is the inner periphery of each arc hole 34. 39 is configured. That is, the stator core plate 38 is punched from the press material 24 by punching the outer edge 39 in this step S4, and the stator core plate 38 is recovered in a stacked state via a take-out port (not shown). Therefore, in the present embodiment, the machining unit 13C arranged third from the left functions as the first machining unit similarly to the machining unit 13A, and the machining unit 13D arranged fourth (rightmost) from the left Similar to the processing unit 13B, it functions as a second processing unit.

  Further, in the lower mold 14 of each processing unit 13A to 13D, when a press material 24 is disposed between the punch 19 and the die 15, a rectangular plate shape is formed at a position on the side as viewed from the press material 24. The guide member 40 is attached and fixed. As shown in FIG. 3A, these guide members 40 are arranged on both sides of the press material 24 in the short direction, and the movement of the press material 24 from the left side to the right side is made along the inner surface of each guide member 40. To guide you. Further, each guide member 40 has a function of suppressing the scattering of cutting powder (iron powder) generated when the press material 24 is punched by the punch 19 and the die 15 to the outside of the processing units 13A to 13D. is doing. In this regard, in the present embodiment, each guide member 40 functions as a scattering suppression member.

  In addition, a suction port is provided at a substantially central portion in the left-right direction of each guide member 40 located on the front side in FIG. 1 so as to face the space S between the punch 19 and the die 15 (see FIG. 3B). 41 is penetratingly formed. The suction ports 41 are connected to suction pipes 47 described later from outside the processing units 13A to 13D. FIG. 3A illustrates the processing unit 13B that executes the step S2. However, in the other processing units 13A, 13C, and 13D, as in the case of the processing unit 13B, the respective lower molds 14 are used. The guide member 40 described above is attached and fixed.

  In the progressive press machine 11 of the present embodiment, as shown in FIGS. 3A and 3B, cutting powder generated from the press material 24 when the press material 24 is punched by the punch 19 and the die 15. A suction recovery mechanism 43 for recovering (iron powder) 42 is provided. The suction and recovery mechanism 43 is provided with a recovery unit 44 that recovers the cutting powder 42 and a blower unit 46 that is connected to the recovery unit 44 via a blower pipe 45. The blower 46 is always driven while the progressive press machine 11 is being driven (that is, while the punch 19 and the die 15 are moving relative to each other), and is indicated by the broken arrow in FIG. As shown, air (gas) is pumped into the collection unit 44 via the blower tube 45.

  Further, a suction pipe 47 whose upstream end 47 a communicates with the suction port 41 of the guide member 40 is connected to a midway portion of the blower pipe 45. The suction pipe 47 is formed so that its pipe diameter is smaller than the pipe diameter of the blower pipe 45. Then, when air flows in the blower pipe 45 toward the recovery part 44 based on the driving of the blower part 46, a negative pressure is generated in the suction pipe 47 communicating with the blower pipe 45. As a result, the punch 19, Air in the space S surrounded by the die 15 and each guide member 40 and the cutting powder 42 are sucked into the suction pipe 47 through the suction port 41.

  Further, in the processing unit (the leftmost processing unit) 13A in the present embodiment, as shown in FIG. 4, the first hole for punching and forming the shaft hole 27 and the magnet insertion hole 29 in the press material 24 in step S1. A punch 50 and a second punch 51 for punching and forming the peripheral hole 28 in the press material 24 and semi-punching the protrusion 28A are provided. That is, the punch 19 </ b> A of the processing unit 13 </ b> A includes the first punch 50 and the second punch 51.

  The second punch 51 is formed such that the length downward from the backing plate 21 is shorter than the first punch 50 by the length h. That is, the second punch 51 is arranged such that the distance between the opposing die 15A is longer than the first punch 50 by the length h. As shown in FIG. 4, the die 15A in the processing unit 13A has a first die hole 52 at a position corresponding to the first punch 50, and a second die hole 53 at a position corresponding to the second punch 51. Each is formed.

  Furthermore, in this embodiment, as will be described later, the stroke length of the upper die 17 (punch 19) (the distance between the top dead center and the bottom dead center) is changed as necessary. The first punch 50 is inserted into the corresponding first die hole 52 even when the stroke length of the upper die 17 is changed. In other words, the first punch 50 has a length that allows the shaft hole 27 and the magnet insertion hole 29 to be reliably punched into the press material 24 even when the stroke length is changed to be short. 4 (FIGS. 6A, 6B, 11A, and 11B), the first punch 50 used for punching and forming the second punch 51 and the magnet insertion hole 29, and those The corresponding second die hole 53 and first die hole 52 are shown in simplified form for convenience of illustration.

Next, a punching pre-processing routine executed by the control device 18 of the present embodiment will be described below based on the flowchart shown in FIG.
The control device 18 executes a punching pre-processing routine each time the upper die 17 (punch 19) reaches the top dead center position. In this punching pre-processing routine, the control device 18 determines the number WC of the rotor core plates 30 that are punched from the press material 24 and stacked in the die hole 48 in step S2 in the processing unit 13B, and the rotor core. Measurement is performed every time the plate 30 is punched (step S11). In this respect, in the present embodiment, the control device 18 also functions as a measuring unit that measures the number WC of the laminated rotor core plates 30.

  Subsequently, the control device 18 determines whether or not the number of stacked layers WC measured in step S11 has reached a predetermined number KWC (for example, 100) set in advance (step S12). The predetermined number KWC is a value corresponding to the height of the rotor core 54 (see FIGS. 3A and 7) as a laminate formed by laminating the rotor core plates 30, and is stored in the control device 18. It is preset in the means (eg, ROM). In this regard, in the present embodiment, the control device 18 also functions as a determination unit that determines whether or not the number WC of the rotor core plates 30 has reached the predetermined number KWC.

  If the determination result in step S12 is negative (WC ≠ KWC), the control device 18 sets the stroke length of the upper mold 17 to the first stroke length (first distance) DST1 (step S13). . That is, the control device 18 sets the bottom dead center position of the upper mold 17 to the first bottom dead center position UPS1 by adjusting the stroke amount of the hydraulic cylinder 20, as shown in FIG. Thereafter, the control device 18 ends the punching pre-processing routine. Note that the first stroke length DST1 and the first bottom dead center position UPS1 can be punched into the press material 24 by the first punch 50 and can be punched from the press material 24 by the second punch 51. The stroke length and bottom dead center position that can be half-punched (that is, cannot be punched).

  On the other hand, when the determination result of step S12 is affirmative (WC = KWC), the control device 18 sets the number of stacked sheets WC measured so far to “0” (step S14). And the control apparatus 18 sets the stroke length of the upper mold | type 17 to 2nd stroke length (2nd distance) DST2 longer than 1st stroke length DST1 (step S15). That is, as shown in FIG. 6B, the control device 18 sets the bottom dead center position of the upper mold 17 to a second bottom dead center position UPS2 that is lower than the first bottom dead center position UPS1. . Thereafter, the control device 18 ends the punching pre-processing routine. The second stroke length DST2 and the second bottom dead center position UPS2 can be punched into the press material 24 by the first punch 50, and can also be applied to the press material 24 by the second punch 51. The stroke length and bottom dead center position that can be punched.

Next, the operation of the progressive press machine 11 of the present embodiment will be described below with reference to FIGS. 6 (a), 6 (b) and FIG.
Now, when the punching process of the press material 24 by the progressive press processing apparatus 11 is started, the driving of the blower unit 46 of the suction recovery mechanism 43 is started. Then, a negative pressure is generated in each suction pipe 47 extending from the suction recovery mechanism 43 toward each processing unit 13A to 13D. In this state, the punching 19A and 19D and the die 15A to 15D are punched into the press material 24 and half-punched in each of the processing units 13A to 13D.

  That is, the scrap material 26, the rotor core plate 30 and the stator core plate 38 are punched from the press material 24, and at this time, cutting powder 42 is generated from the press material 24. However, in the cutting powder 42, the air in the space S surrounded by the punches 19 </ b> A to 19 </ b> D, the dies 15 </ b> A to 15 </ b> D and the guide members 40 is sucked into the suction pipes 47 through the suction ports 41 of the guide members 40. In this case, the air is drawn by the sucked air flow and flows toward the guide member 40 where the suction port 41 is formed. And the cutting powder 42 which flowed to the guide member 40 side is guided into the suction port 41 along the inner surface of the guide member 40 in which the suction port 41 is formed, and the outflow outside the processing units 13A to 13D is suppressed. The As a result, the cutting powder 42 is sucked into each suction pipe 47 through the suction port 41 of the guide member 40, and then drawn into the blower pipe 45 and air (gas) flowing in the blower pipe 45. It is collected in the collection unit 44.

  Therefore, for example, in the processing unit 13 </ b> B that executes step S <b> 2, the cutting powder 42 is suppressed from adhering to the rotor core plate 30 punched out from the press material 24. Further, when the press material 24 is punched, the cutting powder 42 naturally falls in the die hole 48, and the laminated body (rotor core 54) composed of the plurality of rotor core plates 30 in which the cutting powder 42 is stacked in the die hole 48. ) Is also suppressed. Similarly, in the processing unit 13D that executes step S4, the cutting powder 42 is suppressed from adhering to the stator core plate 38 punched out from the press material 24. Further, when the press material 24 is punched, the cutting powder 42 naturally falls in a die hole (not shown), and the cutting powder 42 comes from a plurality of stator core plates 38 stacked in the die hole (not shown). It is suppressed that it adheres to the laminated body (stator core) which becomes.

  In the processing unit 13A that executes step S1, first, the upper die 17 (punch 19A) is moved by the second stroke length DST2 by driving the hydraulic cylinder 20. Then, as shown in FIG. 6 (b), the upper die 17 is lowered to the second bottom dead center position UPS2 at the portion punched in step S2 as the rotor core plate 30 in the press material 24, The peripheral hole 28 is punched and formed by the second punch 51 at a predetermined position of the part. At the same time, the shaft hole 27 and the magnet insertion hole 29 are punched and formed by the first punch 50. Thereafter, when the press material 24 is sequentially fed to the downstream side, in the processing unit 13B that executes the step S2, the rotor core plate 30 (in FIG. 7 in FIG. 7) in which the shaft hole 27, the peripheral hole 28, and the magnet insertion hole 29 are formed. The lower rotor core plate 30 a) is punched from the press material 24 by the punch 19 </ b> B and the die 15 </ b> B and falls into the die hole 48.

  On the other hand, when the first rotor core plate 30a is punched out in the machining unit 13B, in the upstream machining unit 13A that executes step S1, the stroke length of the upper die 17 (punches 19A to 19D) is The setting is changed to the first stroke length DST1 shorter than the second stroke length DST2. Then, the first bottom dead center position UPS1 where the bottom dead center position of each punch 19A to 19D is higher than the second bottom dead center position UPS2 when the stroke length is set to the second stroke length DST2. Set to

  When the hydraulic cylinder 20 is driven, the upper die 17 (punch 19A) moves by the first stroke length DST1. Then, as shown in FIG. 6A, the upper die 17 (punch 19A) descends to the first bottom dead center position UPS1 at the portion of the press material 24 to be punched in step S2 as the rotor core plate 30. As a result, the projection 28A is half-formed by the second punch 51 at a predetermined position of the part. At the same time, the shaft hole 27 and the magnet insertion hole 29 are punched and formed by the first punch 50.

  Thereafter, when the press material 24 is sequentially fed downstream, in the processing unit 13B that executes step S2, the rotor core plate 30 in which the shaft hole 27, the projection 28A, and the magnet insertion hole 29 are formed is replaced with the punch 19B and the die 15B. As a result, the rotor core plate 30 falls into the die hole 48. That is, the second rotor core plate 30b from the bottom in FIG. 7 falls into the die hole 48 and is stacked on the first rotor core plate 30a described above in the die hole 48. Thereafter, similarly, a plurality of (for example, 99 sheets. In this embodiment, only three sheets are shown in FIG. 7 for simplification of drawings), the rotor core plate 30b is sequentially punched out, and these are die holes 48. It is laminated in order.

  When the laminated number WC of the rotor core plates 30 reaches a predetermined number (for example, 100, four in FIG. 7) KWC, it is determined that the rotor core 54 having a predetermined thickness is completed, and the upper die 17 (punches 19A to 19D) is determined. ) Is changed to a second stroke length DST2 that is longer than the first stroke length DST1. Then, the second bottom dead center position UPS2 at which the bottom dead center position of each punch 19A to 19D is below the first bottom dead center position UPS1 when the stroke length is set to the first stroke length DST1. Set to Therefore, as shown in FIG. 6 (b), the upper die 17 is lowered to the second bottom dead center position UPS2 in the portion punched in step S2 as the rotor core plate 30 in the press material 24, The peripheral hole 28 is punched and formed by the second punch 51 at a predetermined position of the part.

  Then, when the upper die 17 (punches 19A to 19D) is raised to the top dead center position, the stroke length of the upper die 17 is changed again to the first stroke length DST1, and the bottom dead center of the upper die 17 is changed. The position is again changed to the first bottom dead center position UPS1. That is, in the progressive press processing apparatus 11 of the present embodiment, the process is performed as the rotor core plate 30 in the press material 24 by changing the stroke length (that is, the bottom dead center position) of the upper die 17 (punches 19A to 19D). The formation of the projection 28A and the formation of the peripheral hole (through hole) 28 at a predetermined position of the part to be punched in S2 can be freely changed. After that, each rotor core plate 30 (30a, 30b) taken out from a take-out port (not shown) in a laminated state is composed of one rotor core plate 30a and a plurality of layers (for example, 99 pieces (three pieces in FIG. 7) of the rotor core 54 of the laminate unit composed of the rotor core plates 30b are pressed in the lamination direction and fixed to each other.

Therefore, in this embodiment, the following effects can be obtained.
(1) In the present embodiment, as a workpiece punched from the press material 24 by sucking the cutting powder 42 generated when the press material 24 is punched by the punch 19 and the die 15 by the suction recovery mechanism 43. This prevents the cutting powder 42 from adhering to the rotor core plate 30 and the stator core plate 38. Therefore, in the case of a system in which air is blown to suppress adhesion of the cutting powder 42 to the rotor core plate 30 and the stator core plate 38, the press material 24 may flutter, but only the cutting powder 42 is sucked. In the case of this embodiment, flapping of the press material 24 is suppressed. As a result, it is possible to suppress the occurrence of a dimensional error exceeding the tolerance in the rotor core plate 30 and the stator core plate 38.

  (2) Further, the suction port 41 is arranged so that the cutting powder 42 is sucked from the side with respect to the press material 24 arranged between the punch 19 and the die 15. Therefore, unlike the case where air is blown from above the press material 24, it is not necessary to form an air flow path in the punch 19, so that the shape of the punch 19 can be prevented from becoming complicated. Therefore, adhesion of the cutting powder 42 to the rotor core plate 30 and the stator core plate 38 can be suppressed while avoiding complication of the shape of the punch 19 and suppressing occurrence of defective punching of the press material 24.

  (3) The blower unit 46 of the suction collection mechanism 43 is driven to suck and collect the cutting powder 42 while the punch 19 and the die 15 are punched into the press material 24. Therefore, the cutting powder 42 generated at the time of punching the press material 24 can be sucked and collected in a timely manner.

  (4) Each processing unit 13 </ b> A to 13 </ b> D is provided with a guide member (scattering suppression member) 40 at a side position when viewed from the press material 24. Therefore, it can suppress that the cutting powder 42 which generate | occur | produced at the time of the punching process of the press material 24 is scattered outside the process units 13A-13D. Therefore, the amount of the cutting powder 42 scattered outside the processing units 13A to 13D is drastically reduced. As a result, the time for cleaning for collecting the cutting powder 42 scattered outside the processing units 13A to 13D and the number of cleanings are reduced. Can contribute.

  (5) The guide member 40 guides the cutting powder 42 that has flowed to the suction port 41 side in the space S formed by the punch 19, the die 15, and each guide member 40 based on the drive of the suction recovery mechanism 43. It can guide along the inner surface of 40 into the suction port 41. That is, the suction recovery mechanism 43 can efficiently recover the cutting powder 42 by the guide function of the cutting powder 42 to the suction port 41 by the guide member 40.

  (6) The processing unit 13B for punching the rotor core plate 30 from the press material 24 and the processing unit 13D for punching the stator core plate 38 from the press material 24 are provided with suction ports 41 connected to the suction recovery mechanism 43. Therefore, it is possible to satisfactorily suppress the cutting powder 42 from adhering to the rotor core plate 30 and the stator core plate 38 as workpieces punched from the press material 24.

  (7) The stroke length of the upper die 17 (punch 19) is set to the first stroke length DST1 when it is desired to form the protrusion 28A at a predetermined position of the press material 24 (the portion punched out in step S2 as the rotor core plate 30). On the other hand, when it is desired to form the peripheral hole (through hole) 28 at a predetermined position, the second stroke length DST2 is set. That is, it is possible to switch between the half punching process of the projection 28A and the punching process of the peripheral hole 28 only by changing the stroke length of the upper die 17, and thus avoiding the apparatus itself from becoming a complicated configuration. it can. Accordingly, the protrusion 28A is formed on a predetermined position of the press material 24 (the portion punched out in step S2 as the rotor core plate 30) by one second punch 51 while suppressing the complication of the configuration of the apparatus itself. Or the peripheral hole 28 can be formed.

  (8) The punches 19 </ b> A to 19 </ b> D of the processing units 13 </ b> A to 13 </ b> D are simultaneously moved by one hydraulic cylinder (driving means) 20. Therefore, compared with the case where the hydraulic cylinder 20 is provided for each of the processing units 13A to 13D, an increase in the size of the apparatus and an increase in cost can be favorably avoided.

(9) When the number of laminated iron core plates (workpieces) 30 for the rotor WC <predetermined number KWC, the stroke length of the upper die 17 (punch 19) is set to the first stroke length DST1, while the number of laminated sheets WC = In the case of the predetermined number KWC, the stroke length of the upper die 17 (punch 19) is set to the second stroke length DST2. That is, since the hydraulic cylinder (driving means) 20 is driven based on the control signal from the control device 18, the protrusion 28A and the surrounding area of the press material 24 (the portion punched out in step S2 as the rotor core plate 30) The formation of the hole 28 can be switched reliably.
(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the configuration and control for forming the protrusion 28A or the peripheral hole 28 at a predetermined position of the press material (the portion punched out in step S2 as the rotor core plate 30). Is different from the first embodiment. Therefore, in the following description, parts different from those of the first embodiment will be mainly described, and the same or corresponding member configurations as those of the first embodiment are denoted by the same reference numerals, and redundant description will be omitted. Shall.

  As shown in FIGS. 8 and 9, in the progressive press processing apparatus 11 of the present embodiment, a plurality of (four shown in FIGS. 8 and 9) processing units 13 </ b> A to 13 </ b> D are arranged in parallel on a base plate 12. . Each of these processing units 13A to 13D is provided with an upper die 17 supported above each lower die 14 so as to be vertically movable via each column 16, and each upper die 17 (punch 19) is The hydraulic cylinder 20 provided for each die 17 moves the stroke between two positions, a top dead center position and a bottom dead center position. That is, unlike the first embodiment, the progressive press processing apparatus 11 of the present embodiment is configured such that the upper mold 17 (punch 19) of each of the processing units 13A to 13D can be individually stroked.

  Of the machining units 13A to 13D, the machining unit 13A functioning as the first machining unit is configured such that the top dead center position and the bottom dead center position of the upper die 17 (punch 19) can be changed. In the processing units 13B, 13C, and 13D, the top dead center position and the bottom dead center position of the upper die 17 (punch 19) are configured to be unchangeable. And in all the process units 13A-13D, it is comprised so that the stroke length which is the distance between the top dead center position in each upper mold | type 17 (punch 19) and a bottom dead center position may not be changed.

  Further, in the die hole 48 continuously formed from the die 15B to the lower die 14 and the base plate 12 of the processing unit (second processing unit from the left) 13B for executing the step S2, a press material is formed by the processing unit 13B. A weight sensor 55 is provided for measuring the weight of the laminated body (rotor core 54) made of the rotor core plate 30 punched from 24.

Next, a punching pre-processing routine executed by the control device 18 of the present embodiment will be described below based on the flowchart shown in FIG.
The control device 18 executes a punching pre-processing routine each time the upper die 17 (punch 19) reaches the bottom dead center position. In this punching pre-processing routine, the control device 18 is a laminated body (rotor core 54) composed of the rotor core plate 30 that is punched out of the press material 24 and stacked in the die hole 48 in step S2 of the processing unit 13B. Is measured based on a signal from the weight sensor 55 every time the rotor core plate 30 is punched (step S20). In this regard, in the present embodiment, the control device 18 and the weight sensor 55 function as a measurement unit that measures the weight WT of the stacked body.

  Subsequently, the control device 18 determines whether or not the weight WT measured in step S20 is equal to or greater than a predetermined weight KWT (for example, 200 g) set in advance (step S21). The predetermined weight KWT is a value corresponding to the height of the rotor core 54 formed by laminating the rotor core plates 30 and is set in advance in storage means (for example, ROM) in the control device 18. In this regard, in the present embodiment, the control device 18 also functions as a determination unit that determines whether or not the weight WT of the stacked body (rotor core 54) is equal to or greater than the predetermined weight KWT.

  If the determination result in step S21 is negative (WT <KWT), the control device 18 drives the hydraulic cylinder 20 to set the top dead center position of the upper die 17 as shown in FIG. A first top dead center position (first position) OPS1 is set (step S22). Then, the controller 18 moves the upper die 17 (punch 19A) between the first top dead center position OPS1 and the first bottom dead center position UPS1 corresponding to the first top dead center position OPS1. In order to do so, the hydraulic cylinder 20 for the step S1 is driven. Thereafter, the control device 18 ends the punching pre-processing routine. Note that the first top dead center position OPS1 and the first bottom dead center position UPS1 are stamped into the press material 24 by the first punch 50 in the processing unit 13A in which the stroke length of the upper die 17 is constant. On the other hand, it is the top dead center position and the bottom dead center position where the punching process cannot be performed on the press material 24 by the second punch 51 and the half punching process is possible.

  On the other hand, if the determination result in step S21 is affirmative (WT ≧ KWT), the control device 18 drives the hydraulic cylinder 20 to set the top dead center position of the upper die 17 as shown in FIG. A second top dead center position (second position) OPS2 that is below the first top dead center position OPS1 is set (step S23). The control device 18 moves the upper die 17 (punch 19A) between the second top dead center position OPS2 and the second bottom dead center position UPS2 corresponding to the second top dead center position OPS2. In order to do so, the hydraulic cylinder 20 for the step S1 is driven. In this respect, in this embodiment, the hydraulic cylinder 20 for the step S1 also functions as a position changing unit that changes the position of the upper die 17 (the punches 50 and 51) in the punching direction (vertical direction). The second top dead center position OPS2 and the second bottom dead center position UPS2 can be stamped into the press material 24 by the first punch 50, and the press material 24 can also be punched by the second punch 51. The top dead center position and the bottom dead center position that can be punched. That is, the second bottom dead center position UPS2 is set lower than the first bottom dead center position UPS1. Thereafter, the control device 18 ends the punching pre-processing routine.

  Next, regarding the operation of the progressive press processing apparatus 11 of the present embodiment, the operation when the top dead center position (and the bottom dead center position) of the upper die 17 (punch 19A) in the processing unit 13A that executes step S1 is changed. Will be described below.

  Now, when punching of the press material 24 by the progressive press processing apparatus 11 is started, in the processing unit 13A that executes step S1, first, the top dead center position of the upper die 17 (punch 19A) is set to the second upper position. The dead point position OPS2 is set. That is, the bottom dead center position of the upper mold 17 is set to the second bottom dead center position UPS2. In this state, the upper die 17 moves by stroke based on the drive of the hydraulic cylinder 20. Then, a peripheral hole 28 is punched and formed at a predetermined position in the press material 24 (periphery of the part punched in step S2 as the rotor core plate 30), and a shaft hole is formed by the first punch 50. 27 and a magnet insertion hole 29 are formed by punching. After that, when the press material 24 is sequentially fed downstream, in the processing unit 13B that executes step S2, the rotor core plate 30a in which the shaft hole 27, the peripheral hole 28, and the magnet insertion hole 29 are formed becomes the punch 19B and the die. 15B is punched from the press material 24 and falls into the die hole 48.

  Further, in the processing unit 13A that executes the step S1, as described above, the upper die 17 is set at the bottom dead center position (the second bottom dead center position with the top dead center position set to the second top dead center position OPS2). When the upper die 17 is lowered to the dead center position UPS2), the upper dead center position of the upper die 17 is changed to the first upper dead center position OPS1 which is higher than the second upper dead center position OPS2. That is, by driving the hydraulic cylinder 20, the bottom dead center position of the upper mold 17 is changed to the first bottom dead center position UPS1 that is above the second bottom dead center position UPS2. Then, the upper mold 17 moves between the first top dead center position OPS1 and the first bottom dead center position UPS1.

  Then, as shown in FIG. 11 (a), the projections 28A are half-formed by the second punch 51 at a predetermined position on the press material 24 (around the portion punched out in step S2 as the rotor core plate 30). At the same time, the shaft hole 27 and the magnet insertion hole 29 are punched out by the first punch 50. Thereafter, when the press material 24 is fed downstream, the rotor core plate 30b on which the projections 28A are formed is punched from the press material 24 by the punch 19B and the die 15B in the processing unit 13B that executes step S2. The rotor core plate 30 b falls into the die hole 48. And in the die hole 48, it is laminated | stacked on the 1st sheet | seat iron core board 30a mentioned above. Thereafter, similarly, a plurality of rotor core plates 30b are sequentially punched out and sequentially stacked in the die hole 48.

  When the weight WT of the laminate formed by laminating the plurality of rotor core plates 30 (30a, 30b) is equal to or greater than the predetermined weight KWT, it is determined that the rotor core 54 having a predetermined thickness is completed, and the upper die 17 (punch The top dead center position 19A to 19D) is changed to the second top dead center position OPS2. That is, the bottom dead center position of the upper mold 17 is changed to the second bottom dead center position UPS2. Therefore, as shown in FIG. 11B, the peripheral hole 28 is punched and formed by the second punch 51 at a predetermined position of the press material 24 (the portion punched out in step S2 as the rotor core plate 30). become. Then, before the upper die 17 (punch 19A) starts to rise toward the top dead center position, the top dead center position of the upper die 17 is changed to the first top dead center position OPS1 by driving the hydraulic cylinder 20. The setting is changed and the bottom dead center position is changed to the first bottom dead center position UPS1.

  That is, in the progressive press processing apparatus 11 of the present embodiment, by changing the top dead center position (and bottom dead center position) of the upper mold 17, the pressing material 24 is not changed without changing the stroke length itself of the upper mold 17. The formation of the projections 28A and the formation of the peripheral holes (through holes) 28 at predetermined positions of the portion (the portion punched out in step S2 as the rotor core plate 30) can be freely changed. Then, when the press material 24 is sequentially fed downstream, in the processing unit 13B that executes step S2, the rotor core plate 30a in which the shaft hole 27, the peripheral hole 28, and the magnet insertion hole 29 are formed becomes the punch 19B and the die. 15B is punched from the press material 24. Then, the rotor core plate 30 falls into the die hole 48 and is laminated in order to form a rotor core 54 as a laminate in the die hole 48.

In this embodiment, in addition to the effects (1) to (6) of the first embodiment, the following effects can also be obtained.
(10) When the top dead center position of the upper die 17 (punch 19) is to be formed at a predetermined position of the press material 24 (the portion punched out in step S2 as the rotor core plate 30), the first top dead center is formed. On the other hand, when it is desired to form the peripheral hole (through hole) 28 at a predetermined position, the point position OPS1 is set to the second top dead center position OPS2. That is, only by changing the top dead center position without changing the stroke length of the upper mold 17, the bottom dead center position of the upper mold 17 is changed to the first bottom dead center position UPS 1 and the second bottom dead center position UPS 2. Therefore, the apparatus itself can be prevented from having a complicated configuration. Accordingly, the protrusion 28A is formed on a predetermined position of the press material 24 (the portion punched out in step S2 as the rotor core plate 30) by one second punch 51 while suppressing the complication of the configuration of the apparatus itself. Or the peripheral hole 28 can be formed.

  (11) When the weight WT of the laminated body composed of the rotor core plates (workpieces) 30 is smaller than the predetermined weight KWT, the top dead center position of the upper die 17 (punch 19) is set to the first top dead center position OPS1. On the other hand, when the weight WT of the laminate is equal to or greater than the predetermined weight KWT, the top dead center position of the upper die 17 (punch 19) is set to the second top dead center position OPS2. That is, since the hydraulic cylinder (driving means) 20 is driven for changing the top dead center position of the upper die 17 based on the control signal from the control device 18, it is stamped in the step S2 as the press material 24 (the rotor core plate 30). The formation of the projections 28A and the peripheral holes 28 at predetermined positions can be switched reliably.

  (12) The hydraulic cylinder 20 for the step S1 not only functions as a driving unit but also functions as a position changing unit. Therefore, it is possible to satisfactorily avoid an increase in the size of the apparatus as in the case where the driving means and the position changing means are separately provided.

Each embodiment may be changed to another embodiment (another example) as follows.
In each embodiment, even if the suction port 41 is provided only in the processing unit 13B and the processing unit 13D for punching a workpiece (rotor core plate 30 or stator core plate 38) from the press material 24 among the processing units 13A to 13D. Good. That is, the suction and recovery mechanism 43 sucks and collects the cutting powder 42 generated when the press material 24 is punched only in the processing units 13B and 13D that punch the rotor core plate 30 and the stator core plate 38 as workpieces. You may make it do.

  -In each embodiment, as long as the suction port 41 can collect | recover the cutting powder 42 which generate | occur | produces when the punching process is performed to the press material 24, it will be arbitrary places (for example, left end in FIG. 1) among the guide members 40. Side).

  -Moreover, you may form the suction port 41 in the both guide members 40 provided in each process unit 13A-13D, respectively. In this case, since suction is performed from both sides, the cutting powder 42 can be collected more efficiently.

-In each embodiment, it is not necessary to provide the guide member 40 in each process unit 13A-13D.
In each embodiment, the air blowing unit 46 of the suction recovery mechanism 43 may be configured to be driven only while the hydraulic cylinder 20 is being driven.

  -In 1st Embodiment, in the processing unit 13B which performs process S2, the weight WT of the laminated body formed by laminating | stacking the rotor core board 30 punched out from the press material 24 in this processing unit 13B is measured, When the measurement result is equal to or greater than the predetermined weight KWT, it may be determined that the laminate has a predetermined thickness.

  In the second embodiment, in the processing unit 13B that executes step S2, the number of laminated WC rotor core plates 30 punched from the press material 24 by the processing unit 13B is measured, and the measurement result is a predetermined number. When the KWC is reached, it may be determined that the rotor core 54 having a predetermined thickness has been formed.

-In each embodiment, although it is actualized in the progressive press processing apparatus 11, you may actualize in the press processing apparatus which has only one processing unit.
In each embodiment, the die 15 may move toward the punch 19 so that the press material 24 is punched and half-punched. Further, the punch 19 and the die 15 may be interlocked so that the press material 24 is punched and half-punched.

The punch 19 may be fixedly attached to the lower die 14 and the die 15 may be fixedly attached to the upper die 17.
-In 2nd Embodiment, the structure which provided the drive means and the position change means separately may be sufficient.

The schematic front view of the progressive press processing apparatus in 1st Embodiment. The punching layout figure which shows the punching location from a press material in order of a process. (A) is a schematic sectional drawing of the process unit which performs process S2, (b) is an enlarged view of the part enclosed with the broken line in Fig.3 (a). The schematic sectional drawing of the processing unit which performs process S1. The flowchart explaining the punching pre-processing routine in 1st Embodiment. (A) is schematic sectional drawing which shows a mode that the upper mold | type descend | falls to the bottom dead center position when the stroke length of an upper mold | type is set to the 1st stroke length, (b) is the stroke length of an upper mold | type 2nd. The schematic sectional drawing which shows a mode that the upper mold | type fell to the bottom dead center position in the case of setting to the stroke length of. The schematic sectional drawing which shows the state on which the iron core board for rotor stamped out from the press material in process S2 was laminated | stacked. The schematic front view of the progressive press processing apparatus in 2nd Embodiment. The schematic front view of the progressive press processing apparatus in 2nd Embodiment. The flowchart explaining the punching pre-processing routine in 2nd Embodiment. (A) is schematic sectional drawing which shows a mode that the upper mold | type descend | falls to the bottom dead center position, when the upper dead center position of an upper mold | type is set to the 1st top dead center position, (b) The schematic sectional drawing which shows a mode that the upper mold | type fell to the bottom dead center position, when a dead center position is set to the 2nd top dead center position.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Progressive press processing apparatus, 13A, 13C ... Processing unit (1st processing unit), 13B, 13D ... Processing unit (2nd processing unit), 15, 15A-15D ... Die, 18 ... Control apparatus (control means, measurement) , Punching, 20 ... hydraulic cylinder (driving means, position changing means), 24 ... press material, 26 ... scrap material, 28 ... peripheral hole (through hole), 28A ... projection, DESCRIPTION OF SYMBOLS 30 ... Iron core board (work) for rotors, 38 ... Iron core board (work) for stators, 40 ... Guide member (scattering suppression member), 41 ... Suction port, 42 ... Cutting powder, 43 ... Suction collection mechanism, 44 ... Collection part , 47 ... suction pipe, 47a ... upstream end, 48 ... die hole, 50 ... first punch, 51 ... second punch, 54 ... rotor core (laminated body), 55 ... weight sensor (measurement means), DST1 ... 1 stroke length (first distance), DST2 ... second stroke length (second distance), KWC ... predetermined number of sheets, KWT ... predetermined weight, OPS1 ... first top dead center position (first position) , OPS2 ... second top dead center position (second position), WC ... number of stacked layers, WT ... weight.

Claims (7)

A press working apparatus that performs a punching process on the press material by disposing a press material between the punch and the die, and relatively moving the punch and the die along a punching direction with respect to the press material,
A first punch arranged such that a distance between the opposing dies is a predetermined distance;
When the first punch is opposed to the die with the press material interposed therebetween, the first punch is also arranged so that the distance between the die opposite to the press material is longer than that of the first punch. 2 punches,
Driving means for relatively moving each punch and the die;
In the case where a protrusion is half-punched by the second punch at a predetermined position of a workpiece punched from the press material, the relative movement distance between each punch and the die is the first distance. While controlling the driving means, when a through hole is punched and formed at the predetermined position by the second punch, a second distance in which the relative movement distance between each punch and the die is longer than the first distance; A press working apparatus comprising control means for controlling the drive means. A first processing unit for punching scrap material from the press material, and a second processing unit for punching the workpiece from the press material fed forward from the first processing unit,
Each punch is provided in the first processing unit, and scrap material is punched from the press material by the first punch, and the projection or through hole is formed at the predetermined position by the second punch,
The second machining unit is provided with only the first punch among the punches, and a workpiece is punched from the press material by the first punch,
The press working apparatus according to claim 1, wherein the relative movement between each punch and the die in each working unit is simultaneously performed by the driving unit. A die hole in which the workpieces punched from the press material are sequentially stacked;
Measuring means for measuring the number of the workpieces laminated in the die hole, or the thickness of the laminate composed of each workpiece;
Determining means for determining whether or not the number of workpieces measured by the measuring means has reached a predetermined number set in advance, or whether or not the thickness of the laminated body has exceeded a predetermined thickness set in advance; In addition,
The control means controls the driving means so that the relative movement distance between each punch and the die becomes the first distance when the determination result by the determination means is negative, while the determination 3. The press according to claim 1, wherein when the determination result by the means is an affirmative determination, the driving means is controlled so that a relative movement distance between each punch and the die becomes the second distance. Processing equipment. A press working apparatus that performs a punching process on the press material by disposing a press material between the punch and the die, and relatively moving the punch and the die along a punching direction with respect to the press material,
A first punch arranged such that a distance between the opposing dies is a predetermined distance;
When the first punch is opposed to the die with the press material interposed therebetween, the first punch is also arranged so that the distance between the die opposite to the press material is longer than that of the first punch. 2 punches,
Driving means for relatively moving each punch and the die;
Position changing means for changing both positions in the punching direction of the punches;
In the case where the protrusion is half-punched by the second punch at a preset predetermined position of the workpiece punched from the press material, the punch in the punching direction is set to the preset first position. After controlling the position changing means, the driving means moves the punches and the die relative to each other. On the other hand, when the through holes are punched and formed at the predetermined positions, the positions of the punches in the punching direction are set. A press provided with control means for relatively moving the punches and the die by the driving means after controlling the position changing means to make the second position closer to the die than the first position. Processing equipment. A first processing unit for punching scrap material from the press material, and a second processing unit for punching the workpiece from the press material fed forward from the first processing unit,
Each punch is provided in the first processing unit, and scrap material is punched from the press material by the first punch, and the projection or through hole is formed at the predetermined position by the second punch,
5. The press working apparatus according to claim 4, wherein the second working unit is provided with only the first punch among the punches, and the workpiece is punched from the press material by the first punch. A die hole in which the workpieces punched from the press material are sequentially stacked;
Measuring means for measuring the number of the workpieces laminated in the die hole, or the thickness of the laminate composed of each workpiece;
Determining means for determining whether or not the number of workpieces measured by the measuring means has reached a predetermined number set in advance, or whether or not the thickness of the laminated body has exceeded a predetermined thickness set in advance; In addition,
When the determination result by the determination means is negative, the control means controls the position changing means to place the punches at the first position, while the determination result by the determination means is positive. The press working apparatus according to claim 4 or 5, wherein in the case of determination, the position changing means is controlled in order to arrange the punches at the second position. The press working apparatus according to any one of claims 4 to 6, wherein the driving unit is configured to also serve as the position changing unit.

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