JP4107774B2 - Punch press control device and control method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a punch press control device and a control method thereof.
[0002]
[Prior art]
A punch press is a punch mold (upper mold) and die mold (lower mold) that are provided so as to be movable up and down facing each other. Processing is performed continuously, and a plurality of dies (punch dies 31 and die dies 33) are provided in a magazine (not shown) corresponding to processing types such as molding and punching and molding conditions. The molds are sequentially exchanged by an automatic mold exchanging device (so-called ATC device) according to the machining purpose, machining shape, and the like. For example, as shown in FIG. 9, a punch die 31 and a die die 33 are provided in a press portion of the punch press so as to face each other and move up and down. The workpiece W is carried between the punch die 31 and the die die 33 by an XY table (not shown) that can move in two horizontal axes, moves on the pass line P, and is positioned. After punching, the workpiece W is moved in a substantially horizontal direction on an XY table, positioned at a processing position, and continuously processed. The drive of the punch shaft that moves the punch die 31 up and down, the lower die shaft that moves the die die 33 up and down, and the horizontal drive of the XY table are usually controlled by an NC controller or the like according to a preset machining program. It has been broken.
[0003]
The height position when the workpiece W after punching moves by the XY table is generally called a pass line P, and is set in advance in a machining program such as an NC controller. Normally, when the workpiece W after punching is moved along the pass line P, the die mold 33 is retracted by a set amount to a height position where it does not contact the workpiece W so that the lower surface of the workpiece W is not damaged. It is supposed to be.
Further, as shown in FIG. 9, for example, when the workpiece W is formed downward, the die 33 is moved based on the downward molding height h1 so that the die mold 33 does not interfere with the molding portion of the workpiece W when the workpiece W is moved. The mold 33 has a function of retracting. This lower die axis retracting function is not set for each die (here, a set of the punch die 31 and the die die 33), but is set for all the dies of one workpiece W. When this retracting function is set, the lower die axis is retracted to a height position separated from the pass line P by a predetermined distance after punching with all the dies, and the workpiece W Can be prevented.
[0004]
[Problems to be solved by the invention]
However, the conventional lower die axis retracting function has the following problems. Consider a case where a workpiece W having a shape as shown in FIG. In the figure, a workpiece W is punched into a forming portion 15 formed upward (convex shape upward). As shown in FIG. 11, the die mold 33 for this purpose has a protruding portion 13 that protrudes upward on the upper surface 12 of the die body 11, and is formed in accordance with the molding height h <b> 2 of the upper convex portion required for the workpiece W. The height h2 of the protrusion 13 is set.
When punching the molding part 15 of the workpiece W, as a first method, when the upper surface 12 of the die body 11 is aligned with the pass line P, the upper surface 12 is aligned with the lower surface of the workpiece W and the upper surface of the protruding portion 13 is molded. Since the workpiece W is moved while the lower die shaft remains in the same height position after being punched in contact with the lower surface of the portion 15, the workpiece W and the protruding portion 13 of the die mold 33 interfere with each other. There's a problem.
In order to solve this problem, as a second method, the lower die shaft retracting function is used, the die mold 33 is lowered from the workpiece W by a predetermined distance, and the protruding portion 13 of the die mold 33 is moved to the workpiece W. It is possible not to interfere with. However, since this conventional retracting function is executed for all the dies, an unnecessarily evacuating (lowering) operation is performed at the time of processing with other dies, which is necessary for processing at each processing position. There is a problem that the time is prolonged and the productivity is lowered.
[0005]
The present invention has been made paying attention to the above problems, and when performing a punching process on a molding part of the workpiece, there is no interference between the die mold and the workpiece when the workpiece is moved after the punching operation is completed, and It is an object of the present invention to provide a punch press control device and a control method thereof that can cause a lower die axis to stand by at a stand-by position suitable for a mold type.
[0006]
[Means, actions and effects for solving the problems]
In order to achieve the above object, a first invention provides a punch die provided so as to be movable up and down, and a die die provided so as to face the punch die and be movable in the same direction as the movement of the punch die. The workpiece and the workpiece W conveyed between the two dies are moved and positioned in a substantially horizontal biaxial direction along the pass line, and after the positioning is completed, the vertical movement of the punch die and the die die is controlled. In a punch press control device having a controller for punching the workpiece W, the controller is: Pa Setting means for presetting an operation pattern based on the machining reference position of the punch axis of the punch mold movement and the lower die axis of the die mold movement for each mold including the punch mold and the die mold. In the operation pattern, the lower die axis standby position after completion of the punching operation can be set, and when the punching process is further performed on the molded part, It was set as a reference mold by the machining reference position change command of the machining program. Based on molding shape height data by molding die , The processing reference position of the die for punching In addition, the lower die axis standby position is maintained regardless of the machining reference position.
[0007]
According to the first invention, a pattern in which the lower die axis descends after the punching operation is completed and waits at the lower die axis standby position is previously included in the operation patterns of the punch axis and the lower die axis. Setting In addition, the lower die axis standby position can be set, and when performing further punching on the molded part, It was set as a reference mold by the machining reference position change command of the machining program. Based on molding shape height data by molding die , The processing reference position of the die for punching Since the lower die axis standby position is maintained regardless of the machining reference position, the lower die axis standby position suitable for the molding type, molding height, etc. of the molding site to be punched and It can be easily moved. Thereby, there is no useless movement in the standby operation of the lower die axis, and the efficiency of the punching work can be improved. Further, the operation pattern and the lower die axis standby position can be arbitrarily set, and punch press processing corresponding to various mold shapes and molding types can be performed.
[0012]
According to a second aspect of the present invention, there is provided a pass line between a punch die that can be moved up and down and a die die that faces the punch die and is movable in the same direction as the movement of the punch die. In the punch press control method for punching the workpiece, the punch die and the die die are set as a set. For each mold, an operation pattern based on the machining reference position of the punch axis of the punch mold movement and the lower die axis of the die mold movement is set in advance, and the operation pattern includes a lower pattern after the punch operation is completed. When it is possible to set the die axis standby position and perform further punching on the molded part, It was set as a reference mold by the machining reference position change command of the machining program. Based on molding shape height data by molding die , The processing reference position of the die for punching In addition, the lower die axis standby position is maintained regardless of the machining reference position.
[0013]
First 2 According to the invention, after the punching process is performed on the molding process part of the workpiece, the die mold is lowered to the standby position according to the molding height of the molding process part, and the die is used. The die die is lowered by a distance suitable for the shape, processing type, molding height, etc., and waits. Therefore, useless movement in the standby operation of the lower die axis is eliminated, and the time required for standby can be shortened. In addition, the lower die shaft can be reliably kept at the standby position corresponding to various molds. As a result, there is no interference between the press shaft and the workpiece, so that scratches on the lower surface of the workpiece can be eliminated, and the disengagement of the micro joint of the workpiece due to flapping of the workpiece due to interference can be eliminated. As a result, the productivity of punching can be improved. In addition, it is possible to perform punching processing on the molding site and expand the punchable region, so that the application range can be expanded and productivity can be improved.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described in detail with reference to the drawings.
FIG. 1 is a hardware configuration diagram of a press section of a punch press according to the present invention. A punch shaft piston 1 is inserted into the punch shaft cylinder 2 so as to be movable up and down, and a stripper shaft piston 11 is inserted into the outer peripheral portion of the lower portion of the punch shaft piston 1 so as to be movable up and down. The stripper shaft piston 11 is inserted into the stripper shaft cylinder 12 so as to be movable up and down. A punch die 31 is detachably attached to the lower end portion of the punch shaft piston 1 and a stripper 32 is detachably attached to the lower end portion of the stripper shaft piston 11. It can project from a through hole 34 provided at the lower end.
[0015]
The punch shaft servo valve 4 is connected to the upper chamber 7 (pressure side) and the lower chamber 8 (pull side) of the punch shaft cylinder 2, and the stripper shaft servo valve is connected to the upper chamber 17 and the lower chamber 18 of the stripper shaft cylinder 12. 14 is connected. Each of the punch shaft servo valve 4 and the stripper shaft servo valve 14 controls the moving direction and speed by controlling the flow rate of pressure oil discharged from a hydraulic pump (not shown) to each cylinder. A punch shaft position detector 6 for detecting the position of the punch shaft piston 1 is mounted between the punch shaft cylinder 2 and the punch shaft piston 1, and between the stripper shaft cylinder 12 and the stripper shaft piston 11. A stripper shaft position detector 16 for detecting the position of the stripper shaft piston 11 is attached.
[0016]
A lower die shaft piston 21 is inserted into the lower die shaft cylinder 22 so as to be movable up and down, and a die mold 33 is detachably attached to a lower end portion of the lower die shaft piston 21. A lower die axis servo valve 24 is connected to the upper chamber 27 (lowering side) and the lower chamber 28 (upward side) of the lower die axis cylinder 22, and the lower die axis servo valve 24 is discharged from a hydraulic pump (not shown). The flow direction to the die shaft cylinder 22 under the pressure oil is controlled to control the moving direction and speed. A lower die axis position detector 26 for detecting the position of the lower die axis piston 21 is attached between the lower die axis cylinder 22 and the lower die axis piston 21.
[0017]
At the height between the punch die 31 and the stripper 32 and the die die 33, a pass line P representing the conveying height of the workpiece W is set. A support member 30 such as a brush or a roller that supports the workpiece W and facilitates conveyance is disposed on the pass line P. The workpiece W is supported along the pass line P by an XY table (not shown). 30 is movable.
[0018]
Further, in the vicinity of a press section provided with a punch die 31, a stripper 32, and a die die 33, a die changing device (hereinafter referred to as an ATC device) 25 and a die magazine 23 are disposed. In the punch press 60, the punch die 31, stripper 32, and die die 33 can be exchanged as a single die set according to the processing type, processing shape, processing conditions, etc., and this die set is a die magazine. It is arranged so that it can be taken in and out of the inside 23. The mold magazine 23 controls the loading and unloading of each mold based on a control command from the controller 40 described later in detail. The ATC device 25 exchanges a die attached to the press unit and a die stored in the die magazine 23 based on a die exchange command from the controller 40.
[0019]
The controller 40 includes a computer device such as a microcomputer and a central processing unit (hereinafter referred to as CPU) such as a numerical processing device. The CPU inputs detection signals from the detectors 6, 16 and 26 via the respective input I / F circuits, and details are described below based on a predetermined arithmetic processing as will be described later, punch shaft 61, stripper shaft 62 and Each axis speed command of the lower die shaft 63 is obtained, and the obtained speed command is outputted to the servo amplifiers 9, 19, and 29 corresponding to each axis via the output I / F circuit. At the time of mold replacement, control commands are output to the ATC device 25 and the mold magazine 23, respectively, and the mold replacement is controlled according to a preset processing sequence.
[0020]
The servo amplifiers 9, 19, and 29 of the punch shaft 61, the stripper shaft 62, and the lower die shaft 63 respectively convert the shaft speed commands from the controller 40 into current commands to convert the punch shaft servo valve 4 and the stripper shaft servo valve. 14 and the solenoid operation part of the lower die axis servo valve 24. The punch axis servo valve 4, the stripper axis servo valve 14, and the lower die axis servo valve 24 control the flow rate to each cylinder so that the flow rate corresponds to the magnitude of the current command value.
[0021]
FIG. 2 shows a block diagram of the control configuration, and the configuration of each control function will be described with reference to FIG.
The data setting means 41 sets die management information and a press operation pattern corresponding to each of the punch die 31, stripper 32 and die die 33. A key, and a write key for taking in and storing the input data. A data display (for example, a graphic display such as a CRT or a numerical display such as an LED) is provided so that data being set or displayed can be displayed. Note that the data setting unit 41 may input setting data to the controller 40 by data communication from a host control device such as an external line management computer.
[0022]
The mold management information storage unit 42 stores the mold management information set by the data setting unit 41 for each mold as shown in FIG. 3, for example. For example, in correspondence with the mold number of each mold, mold data such as machining type, its machining shape, punch mold height, die height, stripper thickness, stripper pressure, mold pressure resistance, etc. are stored. Yes.
The press operation pattern storage unit 43 stores the press operation pattern set by the data setting unit 41 for each operation pattern as shown in FIG. 4, for example. For example, data such as a processing type, a moving speed of each press axis, and a standby position are stored in correspondence with each operation pattern number. Since the type and number of data required for control vary depending on the processing type, the type and order of data are stored in advance as data management information, and data is stored and read based on this data management information. Is called. At this time, for the operation pattern of each press axis, for example, in the case of punching, a motion as shown in FIG. 5 is set, and the speed of each press axis and each press axis sequence of the punch operation (that is, temporal relationship). At the same time, standby position data is set.
[0023]
The machining program MP is a machining program set in advance for each workpiece, and various control commands and control data for punching are described in a predetermined machining program language. The machining program language is described in, for example, an NC command code and a control program language such as a PLC language. In the following description of the present embodiment, an example using the NC command code is shown.
Now, it is assumed that the machining program is described by NC command codes as shown in FIG. 6, for example. In the figure, (T) code represents a plate thickness setting command for the workpiece W to be machined, (P) code represents a standby position setting command, T code represents a used mold selection command, and G00 code represents an XY table. The punching command after completion of the XY axis movement is indicated, and the X code and the Y code indicate movement commands to the X and Y axis movement target positions of the XY table, respectively. Furthermore, the M72 code refers to the die data of the die number (T215 in the figure) described as a parameter, and changes the machining reference position that defines the height position when machining the workpiece with each press axis. The machining reference position change command to be performed is indicated, and the M73 code represents a machining reference position change cancel command for returning the machining reference position to the original pass line.
[0024]
The machining command unit 44 reads the machining program MP, stores it in a predetermined memory area, and performs pre-processing for creating various tables and sequence control based on each command described in the machining program MP.
The used mold information setting unit 45 reads out the mold number in the program execution order based on the used mold selection command in the machining program MP, and stores the mold management information corresponding to the mold number in the mold management information storage. Read from the unit 42. Next, as shown in FIG. 7, the read mold management information is set and stored as table data corresponding to the mold number in the order of use of the mold.
[0025]
The machining reference position data setting unit 46 is based on the die management information stored in the die management information storage unit 42 corresponding to the die number of the used die selection command preprocessed by the machining command unit 44. Then, the data of the machining reference position other than the pass line at the time of punching is automatically set. The set machining reference position data is created as table data for each machining die number at the time of machining, for example, as shown in FIG. 6, the “M72 (T215)” command is retrieved, and machining is performed based on the molding height data of the reference mold number “T215” at the time of punching with the machining mold number “T100”. A reference position “5.00” is set.
[0026]
Further, the processing plate thickness information storage unit 47 reads the setting information of the plate thickness setting command of the processing program MP stored in the processing command unit 44 and stores it as plate thickness data.
The standby position information storage unit 48 reads the setting information of the standby position setting command of the machining program MP stored in the machining command unit and stores it as standby position data. This standby position represents a height position for the punch die 31 and the stripper 32 to temporarily wait from the processing reference position before the workpiece W is moved by the XY table after punching.
[0027]
A machining reference position change / cancel command detection unit (hereinafter referred to as M72 / M73 detection unit) 51 includes a machining reference position change command M72 and a machining reference position change cancel from the machining program MP stored in the machining command unit 44. The command M73 is searched and the search position data is transmitted to the operation pattern setting unit 49.
The punch command detection unit 52 searches for a punch command (G00 code) from the machining program MP stored in the machining command unit 44, and each press shaft at each punch machining position based on the searched punch command. The movement control command value is calculated.
[0028]
The operation pattern setting unit 49 reads the press operation pattern number of the used mold in accordance with the order of the used mold of the mold management information set and stored in the used mold information setting unit 45, and the read press operation pattern number Each setting data of the press operation pattern corresponding to is read from the press operation pattern storage unit 43. Then, in consideration of the plate thickness information in the processed plate thickness information storage unit 47 and the standby position information in the standby position information storage unit 48 in the read press operation pattern setting data, actual machining operation pattern data at the time of execution is created. And stored in the stroke control unit transfer data storage unit 49a. At this time, the lower die axis standby point at the time of execution is the standby position data stored in the standby position information storage unit 48, the standby position data set by the press operation pattern to be executed, and the machining program being executed The maximum value is set among the standby position data set to the maximum value among the molding heights of the molds used up to each execution time in MP. The operation pattern setting unit 49 sets and cancels the machining reference positions of the punch die 31, the stripper 32, and the die die 33 when the machining reference position change command M72 and the machining reference position change cancel command M73 are executed. Then, the machining reference position data of the actual machining operation pattern stored in the stroke control unit transfer data storage unit 49a is changed. Then, during actual machining, the actual machining operation pattern setting data is output to the stroke control unit 53 in accordance with the execution order.
[0029]
The stroke control unit 53 inputs each command stored in the stroke control unit transfer data storage unit 49a from the operation pattern setting unit 49 according to the execution order, and controls each axis of the punch axis of the press unit, the stripper axis, and the lower die axis. The command is calculated and output to the servo amplifiers 9, 19, and 29 for each axis.
[0030]
The XY table movement command detection unit 54 searches for the XY table movement command stored in the machining command unit 44 and synchronizes with the control execution of each press axis by the stroke control unit 53 (that is, the movement of each press axis is completed). An XY table movement control command is calculated and output to the X-axis motor 55 and the Y-axis motor 56 (to move the workpiece later).
[0031]
Next, the operation according to the above configuration will be described.
Before starting the machining, management data for all the molds to be used is stored in the mold management information storage unit 42, and press operation patterns for all the molds to be used are stored in the press operation pattern storage unit 43. It shall be. Here, as the press operation of the punching die, the operation pattern number 1 stores data for using a die die having a flat work surface, and the lower die axis standby position data is set to 0.00 mm. (See FIG. 4). The operation pattern number 2 stores data using a die die 31 (see FIG. 11) in which the processing surface is not flat but the processing portion protrudes upward, and the lower die axis standby position data is − 2.00 mm is set (see FIG. 4).
[0032]
First, the workpiece machining program MP in the machining command unit 44 is read, and the used mold information setting unit 45 searches the T code described in the machining program MP, and in the order of the molds used. Mold information corresponding to the mold number is read from the mold management information storage unit 42 and used mold data is created (see FIG. 7).
[0033]
Next, the machining reference position data setting unit 46 searches for the M72 code (machining reference position change command) described in the machining program MP, and the die number (shown in FIG. 6) described as a parameter in the M72 code. In the NC program example, “height” data in the die management information corresponding to T215) is read from the die management information storage unit 42 and stored as machining reference position data other than the pass line.
Then, the workpiece thickness information of the workpiece thickness setting command described in the machining program MP (“T1.2” code “1.2” in FIG. 6) is stored in the machining plate thickness information storage unit 47. Further, standby position information data (“5.0” of the (P5.0) code in FIG. 6) of the standby position setting command described in the machining program MP is stored in the standby position information storage unit 48.
[0034]
Thereafter, each command is sequentially executed in the order described in the machining program MP, and actual machining is performed, which will be described below according to the execution order.
When “T150” shown in FIG. 6 is read from the machining command unit 44, the ATC device 25 attaches a punching square die corresponding to the die number T150 to the press unit. Next, the mold data of the usage order 4 of the used mold information setting unit 45 is transferred to the operation pattern setting unit 49. Then, referring to the operation pattern number in the transferred mold data, the operation pattern number data group in the press operation pattern storage unit 43 is transferred to the operation pattern setting unit 49. (In this case, the operation pattern number is 1.) Thereafter, the plate thickness data in the processed plate thickness information storage unit 47 is set in the operation pattern setting unit 49, and the standby position data in the standby position information storage unit 48 is set in the operation pattern. The data is transferred to the unit 49. Based on these transferred data, the operation pattern setting unit 49 calculates each setting data of the operation pattern 1 to be executed next, that is, a control command value for each press axis, and transfers it to the stroke control unit 53. Then, the stroke control unit 53 moves and positions the punch shaft and the stripper shaft that were in the ATC replacement position to the upper limit position and the lower die shaft to the lower limit position.
[0035]
Next, the “G00X1000.Y200.” Command is detected by the XY table movement command detection unit 54, and the XY table is moved and positioned based on the XY table movement command. After the positioning is completed, the punch command detection unit 52 transmits a punch command to the stroke control unit 53, and the stroke control unit 53 controls each axis of the press punch axis, stripper axis, and lower die axis based on the operation pattern at this time. The command is calculated and output to the servo amplifiers 9, 19, 29 of each press axis. As a result, the workpiece W is punched. After this punching operation is completed, each axis of the press is moved to the standby position and positioned. Since the standby position of the lower die axis at this time is set to “0 mm” as described above, the lower die axis does not move from the pass line. In this embodiment, the standby position of the lower die axis according to the operation pattern number 1 is fixed at the pass line position, but in order to prevent the work W and the lower die from coming into contact and scratching the lower surface of the work W. In addition, when the XY table is moved, the lower die axis may be retracted according to a preset lower die clearance.
Similarly, the workpiece W is punched by sequentially executing the XY table movement command and the punch command.
[0036]
Next, when “T215” is read from the machining command section 44, the ATC device 25 mounts the upper embossing mold corresponding to the mold number T215 on the press section. Next, as in the case of “T150”, referring to the operation pattern number (in this case, the operation pattern number is 18) in the usage mold information data of the usage order 5 of the usage mold information, The data group of the operation pattern number is transferred to the operation pattern setting unit 49. Thereafter, as in the case of “T150”, the plate thickness data and the standby position data are transferred to the operation pattern setting unit 49. Based on the transferred data, the operation pattern setting unit 49 calculates the control command value of each press axis and transfers it to the stroke control unit 53. The stroke control unit 53 sets the upper limit of the punch axis and the stripper axis at the ATC exchange position. In position, move the lower die axis to the lower limit position and position.
[0037]
Based on the “G00X150.Y300.” Command, the XY table is moved and positioned. After the positioning is completed, the press punch axis, stripper axis and lower die axis are controlled based on the operation pattern at this time. Then, the upper embossing process is performed on the workpiece W. Then, after this punching operation is completed, each press shaft moves to the standby position and is positioned.
Next, based on the “G00X550.Y200.” Command, the XY table is moved and positioned in the same manner as described above. After the positioning is completed, the upper embossing process is performed on the workpiece W by the punching operation based on the operation pattern at this time. After completion of the punching operation, each press shaft moves to the standby position and is positioned.
[0038]
Next, when “T100” (punching round die selection command) is read from the machining command unit 44, the ATC device 25 mounts the punching round die corresponding to the die number T100 on the press unit. Next, as described above, referring to the operation pattern number (in this case, the operation pattern number is 2) in the usage mold information data of the usage order 6 of the usage mold information, the data of the operation pattern number The group is transferred to the operation pattern setting unit 49. Further, similarly to the above, the plate thickness data and the standby position data are transferred to the operation pattern setting unit 49. In accordance with a control command calculated based on these transferred data, the stroke control unit 53 positions the punch axis and the stripper axis at the ATC replacement position to the upper limit position and the lower die axis to the lower limit position.
[0039]
Next, “M72 (T215)” is read from the machining command unit 44, and an M72 command signal is transmitted from the M72 / M73 detection unit 51 to the operation pattern setting unit 49. As a result, the data transferred to the stroke control unit 53 when the punching die corresponding to the mold number T100 is immediately replaced is temporarily stored in the stroke control unit transfer data storage unit 49a of the operation pattern setting unit 49. To do. The machining reference position data (here, “5.00 mm”) corresponding to the current machining die number (here, T100) and the reference die number (here, T215) of the machining reference position data setting unit 46 is an operation pattern setting unit. 49 is read and set, and a calculation is performed to shift the machining position of each press axis in the vertical direction by the machining reference position data value, and the calculated data is transferred to the stroke control unit 53.
[0040]
After the XY table is moved and positioned based on the command “G00X150.Y300.”, The punch command is output from the punch command detection unit 52 to the stroke control unit 53, and each press axis operates according to the operation pattern. The workpiece W is punched. In this case, the machining reference set in the machining reference position data setting unit 46 with respect to the pass line is previously formed in the part embossed and processed at the position “X150.Y300.” With the mold “T215”. Punching is performed at a position shifted in the vertical direction by a distance corresponding to the position (here, 5.00 mm). Therefore, the upper embossed shape is not deformed by punching.
When this punching is completed, each press shaft moves to the standby position. At this time, according to the lower die standby position data (here, the lower die standby position data “−2.00 mm” in the operation pattern 2), the lower die tip position is 2 mm below the pass line position. Positioned. In this case, even if the lower die standby position data is set to 0 mm, there is no interference with the work W because the tip of the lower die moves down to the pass line position and escapes.
[0041]
Next, based on the command of “G00X550.Y200.”, In the same manner as described above, the part that was previously embossed and processed at the position of “X550.Y200.” With the “T215” mold, Punching is performed at a position shifted in the vertical direction by a distance corresponding to the set processing reference position. At this time, when the XY table is moved to the position of “X550.Y200.”, Since the lower die standby position is set to “−2.00 mm”, the lower die tip position is below the pass line. Thus, it does not interfere with the workpiece W.
After the punching is completed, each press shaft moves to the standby point. At this time, the lower die standby position data is set to “−2.00 mm”. Is positioned 2 mm below and does not interfere with the workpiece W.
[0042]
Next, when “M73” is read and an M73 command signal is transmitted from the M72 / M73 detection unit 51 to the operation pattern setting unit 49, the transfer data transferred to the stroke control unit of the operation pattern setting unit 49 by the previous “M72” command. The mold information data of the mold number T100 temporarily stored in the storage unit 49a is transferred to the stroke control unit 53. Thereafter, when the XY table is moved and positioned based on the command “G00X200.Y50.”, A punch command is transmitted from the punch command detection unit 52 to the stroke control unit 53, and each press axis is calculated. It operates according to the actual machining operation pattern, and the workpiece W is subjected to a round punching process. In this case, the machining reference position is set not to the data of the machining reference position data setting unit 46 but to the pass line position.
When the punching is completed, each press shaft moves to the standby position and is positioned. At this time, since the lower die standby position is set to “−2.00 mm”, the lower die tip position is positioned 2 mm below the pass line position. For this reason, the interference between the lower die and the workpiece W is prevented.
[0043]
As described above, according to the above embodiment, the operation pattern of each press axis is set and stored as the die management information together with the die data such as the machining type, molding height, and machining conditions for each die in advance. The lower die axis standby operation pattern can be set as the operation pattern, and the lower die axis standby position data can be stored in the mold management information. In actual machining, after punching, each press axis is controlled based on the standby operation pattern and standby position data set for each die.
As a result, the standby operation of the lower die shaft suitable for the processing type and molding height of the mold to be used is performed, so even when punching is performed on the molding site, it is suitable for the molding type, molding height, molding shape, etc. Lower die axis standby operation can be performed. Accordingly, since the standby operation of the lower die axis is not wasted, the time required for punching at each location can be shortened and the machining can be performed efficiently, and thus the productivity of punching can be improved.
In addition, each press shaft including the lower die shaft can be made to stand by at the standby position correspondingly to molds of various shapes, so that there is no interference between the press shaft and the workpiece. Occurrence is eliminated and the appearance quality of the product is good. Moreover, since the disengagement of the micro-joint of the work due to the flapping of the work in the case of interference can be eliminated, the cleanup work after the disengagement becomes unnecessary. As a result, the productivity of punching can be improved.
Furthermore, since it is possible to efficiently perform punching into various molding sites and the punchable region can be expanded, the application range can be expanded and productivity can be improved.
[0044]
In addition, when the workpiece thickness information command is described in the machining program corresponding to each workpiece and the plate thickness data is set, the die data corresponding to the die used is stored in the die management information. Based on the lower die axis standby position data and operation pattern and the plate thickness data, the standby position height at which the lower die axis should move after completion of the punching operation with the mold used is the height from the pass line. Calculated automatically.
Therefore, the machining program can easily set and move the lower die axis standby position suitable for the mold to be used, thereby improving the efficiency of the punching work. Further, the operation pattern and the lower die axis standby position can be arbitrarily set, and punch press processing corresponding to various mold shapes and molding types can be performed.
[Brief description of the drawings]
FIG. 1 is a block diagram of a hardware configuration of a pressing unit of a punching press according to the present invention.
FIG. 2 is a control block diagram of the punching press of the present invention.
FIG. 3 is an explanatory diagram of a mold management information storage unit according to the present invention.
FIG. 4 is an explanatory diagram of a press operation pattern storage unit according to the present invention.
FIG. 5 is an explanatory diagram of an example of a press operation pattern according to the present invention.
FIG. 6 is an explanatory diagram of a machining program according to the present invention.
FIG. 7 is an explanatory diagram of a used mold information setting unit according to the present invention.
FIG. 8 is an explanatory diagram of a processing reference position data setting unit according to the present invention.
FIG. 9 is an explanatory diagram of a conventional press unit and a lower die shaft retracting function.
FIG. 10 is an explanatory diagram of an example of punching into an upward molding site.
11 is a perspective view of a die mold used in the punching example of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Punch shaft piston, 2 ... Punch shaft cylinder, 4 ... Punch shaft servo valve, 6 ... Punch shaft position detector, 9, 19, 29 ... Servo amplifier, 11 ... Stripper shaft piston, 12 ... Stripper shaft cylinder, 14 ... Stripper shaft servo valve, 16 ... stripper shaft position detector, 21 ... lower die shaft piston, 22 ... lower die shaft cylinder, 24 ... lower die shaft servo valve, 26 ... lower die shaft position detector, 30 ... support member, 31 DESCRIPTION OF SYMBOLS ... Punch die, 32 ... Stripper, 33 ... Die die, 40 ... Controller, 41 ... Data setting means, 42 ... Die management information storage unit, 43 ... Press operation pattern storage unit, 44 ... Processing command unit, 45 Use tool information setting unit, 46 ... Machining reference position data setting unit, 47 ... Machining plate thickness information storage unit, 48 ... Standby position information storage unit, 49 ... Operation pattern setting unit, 5 DESCRIPTION OF SYMBOLS 1 ... Machining reference position change / cancel command detection part (M72 / M73 detection part), 52 ... Punch command detection part, 53 ... Stroke control part, 54 ... XY table movement command detection part, 55 ... X-axis motor, 56 ... Y Axis motor, 61 ... punch axis, 62 ... stripper axis, 63 ... lower die axis. P ... pass line, W ... work, MP ... machining program.

Claims (2)

A punch die (31) provided movably up and down, and a die die (33) provided opposite to the punch die (31) and movable in the same direction as the movement of the punch die (31) The workpiece W conveyed between the two dies (31, 33) is moved and positioned in two substantially horizontal axes along the pass line, and after the positioning is completed, the punch dies (31) and the die dies ( 33) In a punch press control device comprising a controller for controlling the vertical movement of 33) and punching the workpiece (W),
The controller (40) includes a punch axis for moving the punch mold (31) and a die mold (33) movement for each mold including the punch mold (31) and the die mold (33) as a set. The lower die axis has a setting means for presetting an operation pattern based on the machining reference position, and the operation pattern can set a lower die axis standby position after the punch operation is completed,
When further punching is performed on the part that has been molded , the die for punching is based on the height data of the molding shape by the molding die set as the reference die by the machining reference position change command of the machining program A punch press control device characterized in that the lower die axis standby position is maintained regardless of the machining reference position. A punch die (31) provided movably up and down, and a die die (33) provided opposite to the punch die (31) and movable in the same direction as the movement of the punch die (31) Of the punch press that punches the workpiece W by alternately executing the movement of the workpiece W along the path line between the two and the punching movement of the punch die (31) and the die die (33) vertically. In the control method,
Machining standards for the punch axis of the punch mold (31) and the lower die axis of the die mold (33) movement for each mold including the punch mold (31) and the die mold (33) as a set In addition to presetting an operation pattern based on the position, it is possible to set a lower die axis standby position after the punch operation is completed in the operation pattern,
When further punching is performed on a part that has been molded , the die for punching is based on the height data of the molding shape by the molding die set as the reference die by the machining reference position change command of the machining program And controlling the lower die axis standby position regardless of the machining reference position.

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