JP2020066023A - Turret punch press and method for control of turret punch press - Google Patents

Abstract

To provide a turret punch press which can avoid most of problems which hinder operation of the turret punch press, even if a non-resident metal mold is removed from a station.SOLUTION: When receiving metal mold exchange command for exchanging a metal mold mounted on a turret by a processing program, a metal mold movement control part 724 so controls as to move a metal mold mounted on a designated station to a storage in the case that the metal mold is mounted on the designated station designated by the metal mold exchange command, and thereafter, as to move the metal mold, which has been mounted on the storage and has been designated by the metal mold exchange command, to the turret. When the metal mold mounted on the designated station is a normal metal mold and the metal mold moved to the designated station from the storage is a non-resident metal mold, a stopgap metal mold selection part 725 selects the normal metal mold moved to the storage as a stopgap metal mold. A storage part 71 stores stopgap metal mold information concerning the stopgap metal mold.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a turret punch press and a turret punch press control method.

  A turret punch press for processing a sheet metal by using a punch and a die is widely used as a die for processing a sheet metal. The turret punch press comprises an upper turret and a lower turret on which a punch and a die are mounted, respectively.

Japanese Patent No. 6174986

  In Patent Document 1, dies that may interfere with the operation of the turret punch press when mounted on a turret are classified into special dies, and the special dies are moved to a buffer turret after processing a sheet metal using the special dies. It describes a turret punch press. The special mold is also attached to the turret only when the sheet metal is processed based on the instruction of the processing program, and is removed from the turret after the processing, so it is also called an emergency metal mold. The buffer turret is a turret for storage that stores molds that are not used or wait until they are used.

  By removing the emergency die from the turret, it is possible to eliminate the possibility of hindering the operation of the turret punch press. However, it has become clear that when the emergency die is removed from the station and the die is not attached, a new problem may occur that hinders the operation of the turret punch press.

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a turret punch press and a turret punch press control method capable of almost avoiding a problem that hinders the operation of the turret punch press even when the emergency die is removed from the station.

  The present invention relates to a turret having a plurality of first stations for mounting a die used when processing a work, a storage having a plurality of second stations for mounting a die, and A mold moving mechanism for moving a mold mounted in a second station to the first station and a mold mounted in the first station to the second station; The die attached to the first station or the second station is a normal die that is always attached to the turret, or when the die is not always attached to the turret and the workpiece is processed. A mold information storage unit that stores mold information indicating whether the mold is an emergency mold to be moved from the storage to the turret, and the turret by a machining program. When the mold replacement command for replacing the mounted mold is received, if the mold is mounted in the designated station designated by the mold replacement command among the plurality of first stations, After the mold attached to the designated station is moved to the storage, the mold attached to the storage and designated by the mold replacement command is moved to the turret, and then to the designated station. Based on the mold movement control unit that controls the mold moving mechanism to be mounted and the mold information, the mold mounted in the designated station is a normal mold and is moved from the storage to the designated station. When the die is a non-resident die, the normal die attached to the designated station and moved to the storage is replaced by the non-resident die. Refilling die, a hole-filling die selecting section for selecting a hole-filling die for filling the cavity created in the designated station by returning the non-resident die to the storage, and then mounting the hole-filling die in the designated station. In order to achieve this, there is provided a turret punch press including a hole filling mold information storage unit that stores hole filling mold information regarding the hole filling mold selected by the hole filling mold selection unit.

  According to the present invention, when a control device for controlling a turret punch press receives a mold replacement command for replacing a mold mounted on a turret by a processing program, among a plurality of first stations included in the turret, It is determined whether or not a mold is installed in the specified station specified by the mold replacement command, and if the mold is installed in the specified station, the mold installed in the specified station is stored. To the turret, and the mold moving mechanism is controlled so that the mold mounted in the storage and designated by the mold replacement command is moved to the turret, and the mold information is stored. Based on the mold information stored in the unit, the mold installed in the specified station is a normal mold, and the specified space is stored in the storage. It is determined whether or not the mold moved to the partition is a non-resident mold, and when the condition is satisfied, the normal mold attached to the designated station and moved to the storage is To select the non-resident metal mold as a hole-filling mold for filling a cavity generated in the designated station by returning the non-metal mold to the storage, and to mount the hole-filling mold in the designated station after returning the non-resident metal mold to the storage. A method of controlling a turret punch press for storing hole-filling mold information about a selected hole-filling mold in a hole-filling mold information storage unit.

  According to the turret punch press and the control method of the turret punch press of the present invention, even if the non-resident die is removed from the station, it is possible to avoid most of the problems that hinder the operation of the turret punch press.

It is a figure showing the example of the whole composition of the turret punch press of one embodiment. It is a block diagram showing a concrete example of composition of an NC unit with which a turret punch press of one embodiment is provided. It is a figure which shows a processing program schematically. It is a figure which shows an example of the metal mold | die which moves between a turret and a storage. It is sectional drawing which shows the upper turret and the lower turret in the state with which the punch and the die were mounted. It is sectional drawing which shows schematically the upper turret and the lower turret in the state which removed the punch and the die. It is a flow chart which shows processing which NC apparatus performs, when a mold exchange command which exchanges a mold attached to a turret is received. FIG. 6B is a flowchart following FIG. 6A showing a process executed when the NC device receives a mold replacement command for replacing a mold mounted on the turret.

  Hereinafter, a turret punch press and a control method of the turret punch press according to one embodiment will be described with reference to the accompanying drawings. In FIG. 1, a turret punch press 100 includes a main body 1, a table 2 on which a work W that is a sheet metal to be processed is placed, a work moving mechanism 3 that moves the work W integrally with the table 2, a storage 5, and an NC device. 7 is provided. The main body 1 is provided with a turret 4 which is rotatable about a shaft 4a, and an arm 6 which rotates about a shaft 6a.

  The turret 4 is provided with a plurality of stations 40 (first stations) for mounting a plurality of molds. The station 40 may be referred to as a turret station. More specifically, as will be described later, the turret 4 is composed of an upper turret 4U for mounting the punch P and a lower turret 4L for mounting the die D (see FIG. 5A or FIG. 5B).

  The work moving mechanism 3 includes a work holding unit 31 that holds the work W by a pair of work clampers 32, an X axis 33 that moves the work holding unit 31 in the X direction, and the work holding unit 31 that is integrated with the table 2 in the Y direction. It has a Y-axis 34 for moving in the direction.

  The storage 5 is provided near the turret 4 and near the main body 1. The storage 5 corresponds to the buffer turret in Patent Document 1, and the storage 5 is equipped with an unused mold or a plurality of molds waiting for use. Similar to the turret 4, in detail, the storage 5 includes a punch storage for mounting the punch P and a die storage for mounting the die D. For example, the die storage is provided in two stages, an upper stage and a lower stage. The storage 5 is rotatable around a shaft 5a. The storage 5 is provided with a plurality of stations 50 (second stations) for mounting molds.

  The arm 6 is a mold moving mechanism that moves a mold mounted on the storage 5 to the turret 4 and a mold mounted on the turret 4 to the storage 5.

  The NC device 7 controls the entire movement of the turret punch press 100. The NC device 7 is an example of a control device that controls the turret punch press 100. A program server 8 and a mold server 9 are connected to the NC device 7. The program server 8 and the mold server 9 may be installed in a remote place apart from the NC device 7, and may be connected to the NC device 7 by an arbitrary network such as a LAN.

  The specific configuration and operation of the NC device 7 will be described with reference to FIG. In FIG. 2, the NC device 7 has a storage unit 71 and a central processing unit (hereinafter, CPU) 72. The program server 8 stores a machining program for machining the work W. The machining program is transferred to the NC device 7 and stored in the storage unit 71. As will be described later, the machining program includes information on dies used for machining the workpiece W, and the storage unit 71 stores a list of used dies based on the machining program.

  Mold information is stored in the mold server 9. The mold information includes information such as the type and size of each mold. In addition, the mold information indicates that each mold is a normal mold that is always mounted on the turret 4, or is normally mounted on the storage 5 and is transferred from the storage 5 to the turret 4 when processing the work W. Contains information that indicates if it is a non-resident type to be moved. The storage unit 71 stores the mold information read from the mold server 9.

  It suffices that the storage unit 71 stores at least mold information about the mold mounted on the turret 4 and the mold mounted on the storage 5. The mold information includes mold information of molds that are not in the used mold list. The storage unit 71 may store hole filling mold information, which will be described later.

  Although not shown in FIG. 2, when the arm 6 moves the mold between the turret 4 and the storage 5, the CPU 72 mounts the mold on the turret 4 in the storage unit 71. The storage unit 71 is configured to store information indicating whether the storage unit 71 is attached to the storage unit 5.

  In FIG. 2, the machining program, the used mold list, the mold information, and the filling mold information are illustrated as being stored in one storage unit 71, but each may be stored in a separate storage unit. Good. How the processing program, the used mold list, the mold information, and the filling mold information are stored in one or a plurality of storage units is arbitrary. The NC device 7 may have a machining program storage unit, a used mold list storage unit, a mold information storage unit, and a filling mold information storage unit. Each storage unit may be provided outside the NC device 7.

  The CPU 72 includes a work movement control unit 721 that controls the work movement mechanism 3, a turret rotation control unit 722 that controls the rotation of the turret 4, a storage rotation control unit 723 that controls the rotation of the storage 5, and a mold movement that controls the arm 6. It has a controller 724. Further, the CPU 72 has a hole filling mold selection unit 725. The work movement control unit 721 to the filling die selection unit 725 can be functionally configured by the CPU 72 executing software (computer program).

  FIG. 3 schematically shows an example of a machining program composed of machine control codes. X1000. In codes C1 to C9 shown in FIG. Y1200. The character strings with X and Y attached thereto indicate positions where the work W is moved by the work moving mechanism 3 and the work W is processed. Further, for example, T101 of the character string T1019011 of the code C1 indicates the number of the station 40 of the turret 4, and 901 following it indicates the number of the station 50 of the storage 5.

  There are two dies D paired with the punch P. One die D is attached to the upper die storage and the other die is attached to the lower die storage. The 1 at the end is a value that identifies which of the two dies D is present. For example, 1 is the die D mounted in the upper die storage.

  In FIG. 4, a station 40 provided in the turret 4 and a station 50 provided in the storage 5 are extracted and shown. The stations 40 are numbered starting with T, and the storages 5 are numbered starting with S. The arrangement of the stations 40 and 50 of each size shown in FIGS. 4 and 5 is an example.

  The character string T1019011 of the code C1 means that it is a movement command M1 for moving the mold attached to the station 50 of number S901 shown in FIG. 4 to the station 40 of number T101. More specifically, the mold designated by the code C1 is mounted on the punch P attached to the station 50 of punch storage number S901 and the punch P attached to the station 50 of upper die storage number S901. It is die D. It is assumed that the mold attached to the station 50 having the number S901 is a normal mold. In FIG. 4, the movement of the mold from the storage 5 to the turret 4 is shown by a broken line, and the movement of the mold from the turret 4 to the storage 5 is shown by a dashed line.

  Therefore, the code C1 shown in FIG. 3 is a command to move the normal die attached to the station 50 with the number S901 to the station 40 with the number T101 and process the positions X1000 and Y1200 with the normal die. Means Since the codes C2 and C3 do not include the mold moving command, it means a command to process each position with the same normal mold as the code C1.

  Similarly, the code C4 moves the mold attached to the station 50 with the number S301 to the station 40 with the number T106 as indicated by the movement command M2 in FIG. Means to process. Since the end is also 1 in the code C4, the mold specified by the code C4 means, specifically, the punch P attached to the station 50 of the punch storage number S301 and the upper die storage. The die D is mounted on the station 50 of No. S301. The codes C5 and C6 mean a command to process each position with the same die as the code C4.

  The character string T1014011 in the code C7 means that the mold attached to the station 50 with the number S401 is moved to the station 40 with the number T101. Since the end is also 1 in the code C7, the mold specified by the code C7 means, specifically, the punch P attached to the station 50 of the punch storage number S401 and the upper die storage. The die D is mounted on the station 50 of No. S401. It is assumed that the mold attached to the station 50 having the number S401 is a non-resident mold.

  However, in the station 40 with the number T101, the normal mold that has already been attached to the station 50 with the number S901 is attached according to the movement command M1.

  Therefore, in this case, the character string T1014011 means that the movement command M4 is executed subsequent to the movement command M3 shown in FIG. The move command M3 is a command for returning the normal mold mounted on the station 40 with the number T101 to the station 50 with the number S901. The move command M4 is a command to move the non-resident die attached to the station 50 with the number S401 to the station 40 with the number T101.

  Therefore, the code C7 means a command to process the positions X1000 and Y1200 with the non-resident die moved to the station 40 with the number T101. The codes C8 and C9 are the same as the code C7, and mean a command to process each position with a non-resident die.

  When it is a command to move another mold to the station 40 where the mold is already mounted, the CPU 72 returns the already mounted mold to the station 50 and then commands another mold to move. Understand that Therefore, there is no need for an independent command to replace the mold.

  In FIG. 2, the hole filling mold selection unit 725 requires that the mold already mounted on the turret 4 is a normal mold and the mold moved from the storage 5 to the turret 4 is an emergency resident mold. When filling, the normal mold returned to the storage 5 is selected as the hole filling mold. The CPU 72 causes the storage unit 71 to store information about the filling mold selected by the filling mold selection unit 725 as the filling mold information. The hole filling mold information may be the number of the station 50 in which the normal mold returned to the storage 5 is mounted.

  As will be described later, the hole filling mold selection unit 725 may select a predetermined mold as the hole filling mold under conditions other than the above conditions.

  The reason for selecting the hole filling mold will be described with reference to FIGS. 5A and 5B. FIG. 5A shows a state in which the punch P and the die D are mounted on the upper turret 4U and the lower turret 4L, respectively, and the work W is inserted between the punch P and the die D. The emergency die is returned from the turret 4 to the storage 5 after processing the work W using the emergency die. Then, as shown in FIG. 5B, the station 40 of the lower turret 4L becomes a cavity, so that the tip of the thin work W may hang down and enter the cavity. If the work W (table 2) moves with the tip of the work W entering the cavity, the proper movement of the work W is hindered.

  In order to fill the cavity generated in the lower turret 4L after returning the non-resident die to the storage 5, if a die D as a hole filling die is attached to the station 40, the tip of the work W will enter the cavity and It is possible to avoid the problem that proper movement is hindered. That is, by mounting the hole-filling mold in the hollow station 40, there is almost no possibility of disturbing the operation of the turret punch press 100.

  The operation of the turret punch press 100 and the control method of the turret punch press 100 will be described with reference to the flowcharts shown in FIGS. 6A and 6B.

  In FIG. 6A, the CPU 72 determines in step S1 whether or not a die replacement command for exchanging the dies (punch P and die D) mounted on the turret 4 is received by the processing program. If the mold replacement command has not been received (NO), the CPU 72 repeats the process of step S1. When the mold replacement command is received (YES), the CPU 72 determines in step S2 whether or not the mold is attached to the designated turret station (hereinafter, designated station). If the mold is not attached to the designated station (NO), the CPU 72 shifts the processing to step S6.

  If the mold is attached to the designated station (YES), the CPU 72 returns the mold attached to the designated station to the storage 5 in step S3. Subsequently, in step S4, the CPU 72 determines whether or not the returned mold is a normal mold and the mold of the mold replacement command is a non-resident mold. At this time, the CPU 72 refers to the mold information stored in the storage unit 71.

  If the returned mold is the normal mold and the mold of the mold replacement command is not the non-resident mold (NO), the CPU 72 shifts the processing to step S6. If the returned mold is a normal mold and the mold of the mold exchange command is a non-resident mold (YES), the CPU 72 returns the mold (punch P and die D) returned to the storage 5 in step S5. It is stored in the storage unit 71 as a hole filling mold for the designated station. Subsequently, the CPU 72 shifts the processing to step S6. In step S6, the CPU 72 moves the mold of the mold replacement command to the designated station.

  In FIG. 6B, the CPU 72 determines in step S7 whether or not there is an emergency resident mold other than the mold of the mold replacement command in the turret 4. If there is no non-resident die other than the die of the die replacement command (NO), the CPU 72 shifts the processing to step S13.

  If there is an emergency resident mold other than the mold of the mold replacement command (YES), the CPU 72 returns the non-resident dies other than the mold of the mold replacement command in the turret 4 to the storage 5 in step S8. Subsequently, in step S9, the CPU 72 determines whether or not there is a hole filling die for the turret station to which the non-resident die has been moved. At this time, the CPU 72 refers to the mold information stored in the storage unit 71.

  If there is a hole filling mold (YES), the CPU 72 moves the non-resident metal mold to the empty turret station in step S12, and moves the process to step S13.

  If there is no hole-filling mold in step S9 (NO), the CPU 72 determines in step S10 whether the storage 5 has a mold of the same size as the turret station that has been emptied by moving the non-resident mold. To judge. If there is a mold of the same size (YES), the CPU 72 preferentially selects a mold that is not in the used mold list as a hole filling mold in step S11, and shifts the processing to step S12. If the molds of the same size are the only ones in the used mold list, the molds in the used mold list may be selected as the hole filling molds.

  As the die selected in step S11, for example, when the die D is mounted on the lower turret 4L, the upper end of the die D may protrude from the upper surface of the lower turret 4L, which may hinder the operation of the turret punch press 100. Certain special molds are excluded.

  When shifting from step S11 to step S12, the CPU 72 moves the hole filling mold selected in step S11 to the empty turret station in step S12, and shifts the process to step S13. If there is no mold of the same size in step S10 (NO), there is no mold that can be selected as the hole filling mold, so the CPU 72 shifts the processing to step S13.

  In step S13, the CPU 72 determines whether the turret 4 has an empty turret station. If there is an empty turret station (YES), the CPU 72 determines in step S14 whether or not the storage 5 has a mold of the same size as the empty turret station. If there is a mold of the same size as the empty turret station in the storage 5 (YES), the CPU 72 preferentially moves the mold not in the used mold list to the hole filling turret 4 in step S15 for processing. To finish. The special mold is also excluded in step S15.

  If there is no empty turret station in the turret 4 in step S13 (NO), and if there is no mold of the same size in the storage 5 in step S14 (NO), the CPU 72 ends the process.

  The mold movement control unit 724 returns the non-resident mold to the storage 5, and then, based on the fill mold information stored in the storage unit 71, the mold filling controller mounted in the storage 5 is set in the turret 4. The arm 6 is controlled so as to be moved and attached to the designated station. As a result, even if the emergency die is removed from the station 40 of the turret 4, almost no trouble occurs that hinders the operation of the turret punch press 100.

  The present invention is not limited to the present embodiment described above, and various modifications can be made without departing from the gist of the present invention.

1 main body 2 table 3 work moving mechanism 4 turret 5 storage 6 arm (die moving mechanism)
7 NC device (control device)
8 Program server 9 Mold server 71 Storage unit 72 Central processing unit 721 Work movement control unit 722 Turret rotation control unit 723 Storage rotation control unit 724 Mold movement control unit 725 Hole filling mold selection unit 100 Turret punch press W Work

Claims (4)

A turret having a plurality of first stations for mounting a mold used when processing a workpiece;
A storage having a plurality of second stations for mounting molds;
A mold moving mechanism for moving a mold mounted on the second station to the first station and moving a mold mounted on the first station to the second station;
The die attached to the first station or the second station is a normal die that is always attached to the turret, or the die is not always attached to the turret and the work is processed. A mold information storage unit that stores mold information indicating whether the mold is an emergency mold that is sometimes moved from the storage to the turret,
When a mold replacement command for replacing the mold mounted on the turret is received by the processing program, the mold is mounted on the designated station designated by the mold replacement command among the plurality of first stations. If the mold is attached to the specified station, the mold attached to the specified station is moved to the storage, and then the mold attached to the storage specified by the mold exchange command is moved to the turret. And a mold movement control unit that controls the mold movement mechanism so as to be mounted in the designated station,
Based on the mold information, when the mold attached to the designated station is a normal mold and the mold moved from the storage to the designated station is a non-resident mold, the mold is attached to the designated station. And a normal mold moved to the storage, a hole-filling mold selection unit for selecting as a hole-filling mold for filling a cavity generated in the designated station by returning the non-resident metal mold to the storage,
Filling die information for storing filling die information regarding the filling die selected by the filling die selecting unit for mounting the filling die in the designated station after returning the non-resident die to the storage. Storage part,
Turret punch press equipped with.   The mold movement control unit returns the non-resident mold to the storage, and then, based on the filling mold information stored in the filling mold information storage unit, the filling mold installed in the storage. The turret punch press according to claim 1, wherein the mold moving mechanism is controlled so that the mold is moved to the turret and mounted at the designated station. The control device that controls the turret punch press
When a mold replacement command for replacing the mold mounted on the turret is received by the machining program, the mold is delivered to the designated station designated by the mold replacement command among the plurality of first stations of the turret. Determine whether or not is attached,
When a mold is mounted on the designated station, the mold mounted on the designated station is moved to a storage, and the mold designated by the mold replacement command mounted on the storage is turreted. To control the mold moving mechanism so that the mold is mounted at the designated station,
Based on the mold information stored in the mold information storage unit, the mold attached to the designated station is a normal mold, and the mold moved from the storage to the designated station is an emergency mold. Judge whether or not the condition that there is,
When the above condition is satisfied, the normal mold attached to the designated station and moved to the storage is used as a hole filling mold for filling the cavity generated in the designated station by returning the non-resident mold to the storage. Select
A turret punch press for storing hole-filling mold information about a selected hole-filling mold in the hole-filling mold information storage unit for mounting the hole-filling mold at the designated station after returning the non-resident mold to the storage. Control method.   The control device, after returning the non-resident die to the storage, based on the hole filling mold information stored in the hole filling mold information storage unit, the hole filling mold moved to the storage, The method of controlling a turret punch press according to claim 3, wherein the mold moving mechanism is controlled so as to be moved to the turret and mounted at the designated station.

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