JP2021133376A - Servo press program creation system - Google Patents

Abstract

To provide a servo press program creation system which can obtain various parameters required during processing by minimum input.SOLUTION: A servo press program creation system comprises: a program execution part which drives a servo press to obtain work property; a tool property storage part in which a tool property of the servo press is stored; and a template program storage part 70 in which template of work property exploration program and final purpose program is stored. Mandatory parameters are two comprising a target value and a limit value. A recommendation parameter, which is used in the template of work property exploration program and final purpose program, is calculated on the basis of the tool property, the program execution part executes the work property exploration program to obtain the work property, a program edition part 62 reflects the mandatory parameters, the recommendation parameter and the work property on the template of final purpose program and creates the final purpose program.SELECTED DRAWING: Figure 3

Description

The present invention relates to a servo press program creation system for creating a final purpose program for controlling a servo motor so as to achieve a user's purpose for a servo press in which a ram is driven by a servo motor.

Conventionally, as a press machine, a servo press that drives a reciprocating ram with a servo motor has been known. By the servo press, for example, press molding of metal parts, press-fitting of parts, and assembly of parts can be performed. The servo press can numerically set characteristics such as the load at the time of machining, the speed of the ram, and the machining position, and these characteristics can be detected by the load cell or the encoder. Therefore, control according to the detected value becomes possible by using the control program, so that complicated control becomes possible.

For example, in Patent Document 1, when the ram reaches the intermittent lowering operation start position, the ram is intermittently lowered, and at the same time, the forming load is detected by the load detecting means, and the forming load is applied to the motor each time the ram is intermittently lowered. A bottom dead point probe of a servo press in which the ram rises when it is read into a control device and reaches a set load value is disclosed. According to this device, the ram is raised when a set load value is reached, so that the material can be processed with a constant forming load.

In Patent Document 2, from the set pressurizing speed and the target load, a speed pattern in which the pressurizing speed is proportionally decelerated as the load increases and the pressurizing speed becomes zero when the target load is reached is calculated by a calculation means. Disclosure of a control method for a press device that can be calculated and the electric cylinder is operated according to the calculated speed pattern to pressurize the workpiece so that the work can be reliably pressurized to the target load and the load overshoot can be reduced to zero. Has been done.

JP-A-2002-1596 Japanese Unexamined Patent Publication No. 2005-254290

However, the apparatus described in Patent Document 1 and the control method described in Patent Document 2 are based on the premise that various parameters such as a target load and a contact position of a ram with a work are defined in advance. That is, the control described in each document is premised on the control during machining of the work, and is not the control for setting various parameters before the start of machining of the work.

On the other hand, among the various parameters required at the start of machining, for example, if the contact position with the work is to be obtained manually, this work requires skill and a great deal of labor, and is a dangerous work that requires concentration. Yes, and human error can occur with manual operation.

When various parameters are acquired by program operation, the problems of safety and human error are solved, but it is necessary to input multiple various parameters in order to execute the control program. For this reason, problems that required skill and great effort still remained.

An object of the present invention is to provide a servo press program creation system capable of acquiring various parameters required at the time of machining with a minimum input in view of the problem of determining various parameters at the time of machining by the servo press as described above.

In order to achieve the above object, the servo press program creation system of the present invention provides a final purpose program for controlling the servo press so as to achieve the object of the user for the servo press in which the ram is driven by the servo motor. A servo press program creation system to be created, which includes an input unit for inputting essential parameters, a recommended parameter calculation unit for calculating parameters other than the essential parameters, a program editing unit having a program creation function, and the servo press. The program execution unit that acquires the work characteristics that are the characteristics related to the position of the ram and the load that the ram receives when the servo press is driven, and the tool characteristics that are the characteristics related to the operating performance of the servo press. A tool characteristic storage unit for storing the work characteristics, a work characteristic exploration program template for exploring the work characteristics, and a template program storage unit for storing the template of the final target program, and the essential parameters are target values. The target value and the limit value are values related to the position of the ram or the load received by the ram, and the recommended parameter calculation unit is based on the tool characteristics and the work characteristics. The recommended parameters used for the template of the exploration program and the template of the final target program are calculated, and the program execution unit reflects the tool characteristics, the essential parameters, and the recommended parameters in the template of the work characteristic exploration program. The work characteristic exploration program is executed to acquire the work characteristics, and the program editorial unit reflects the essential parameters, the recommended parameters, and the acquired work characteristics in the template of the final target program, and the final target program. It is characterized by creating.

According to the servo press program creation system of the present invention, there are two parameters input by the user, a target value and a limit value, and the other parameters are recommended parameters from the tool characteristics stored in the tool characteristic storage unit. It is the value calculated by the calculation unit or the value of the work characteristic acquired by executing the work characteristic exploration parameter. Therefore, the user's input to create the final goal program requires a minimum of two essential parameters, and no special skill is required to create the program, and the labor for creating the program is reduced. Become.

The servo press program creation system of the present invention preferably has the following configurations. It is preferable to prepare a plurality of templates for the work characteristic exploration program and the template for the final target program for each type of the target value. According to this configuration, it is possible to create a final target program according to the type of target value.

When the target value is a value related to the position of the ram, the limit value is a value related to the load received by the ram, and when the target value is a value related to the load received by the ram, the limit value is a value related to the load received by the ram. It is preferably a value related to the position. The relationship between these target values and limit values is suitable for preventing deformation of workpieces, jigs, etc. and for protecting mechanical parts of servo presses.

The recommended parameter can be modified by the input of the user, and it is preferable that the recommended parameter is further provided with a parameter input range calculation unit for calculating the input range of the recommended parameter. According to this configuration, the range of change of the recommended parameter can be limited to an appropriate range.

The effect of the present invention is as described above, the parameters input by the user are the target value and the limit value, and the other parameters are the recommended parameter calculation unit from the tool characteristics stored in the tool characteristic storage unit. Is the value calculated by, or the value of the work characteristic acquired by executing the work characteristic exploration parameter. Therefore, the user's input to create the final goal program requires a minimum of two essential parameters, and no special skill is required to create the program, and the labor for creating the program is reduced. Become.

The overall block diagram of the servo press program creation system which concerns on one Embodiment of this invention. The block diagram which shows the structure of the servo press controller which concerns on one Embodiment of this invention. The block diagram which shows the structure of the operation terminal which concerns on one Embodiment of this invention. The flowchart which shows the outline of the creation process of the final purpose program which concerns on one Embodiment of this invention. The figure which showed the list of the template program which concerns on one Embodiment of this invention. The flowchart which shows the execution process by the work characteristic exploration program which concerns on one Embodiment of this invention. The flowchart which shows the program creation procedure by the servo press program creation system which concerns on one Embodiment of this invention. The figure which showed the tool selection screen in one Embodiment of this invention. The figure which showed the operation target selection screen in one Embodiment of this invention. The figure which showed the input screen of the essential parameter in one Embodiment of this invention. The figure which showed the display screen of other parameters of work characteristic exploration problem in one Embodiment of this invention. The figure which showed the display screen of the exploration result in one Embodiment of this invention. The figure which showed the parameter confirmation screen of the final purpose program in one Embodiment of this invention.

The present invention relates to a servo press program creation system, and the servo press program is a program for driving and controlling the servo press 10 during work such as press fitting by the servo press 10 (see FIG. 1). The servo press program creation system according to the present invention creates a drive control program for the servo press 10 according to the user's purpose such as applying a target load to the work or press-fitting a component into the work to a target position. Therefore, hereinafter, the program finally created by the servo press program creating system according to the present invention is referred to as a final purpose program.

The details will be described below, but the final objective program is created by executing the work characteristic exploration program. It is necessary to set various parameters to execute both the work characteristic exploration program and the final target program. In the present embodiment, the set value for determining the operation of the program is referred to as a parameter.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an overall configuration diagram of a servo press program creation system 1 according to an embodiment of the present invention. The servo press program creation system 1 includes a motor drive unit 50, a servo press controller 40, and an operation terminal 60 in addition to the servo press 10 attached to the support 20, but at least a servo having a function of creating a final target program. Anything may be provided as long as it has a configuration corresponding to the press controller 40 and the operation terminal 60.

The servo press 10 is fixed to the support base 21 of the support body 20. The support 20 is a structure in which a support column 23 is interposed between the lower base 22 and the upper support 21. The servo press 10 has a ram 2 and a ball screw 3 built inside the cylinder case 5. Due to the rotation of the ball screw 3, the nut 4 slides in the axial direction of the ball screw 3, and the ram 2 slides integrally with the nut 4 along a guide (not shown) (arrows a and b). The ball screw 3 is rotationally driven by transmitting the rotation of the servomotor 6 to the speed reducer 8 via the timing belt 7.

By lowering the ram 2 (arrow a), the object can be pressed by the ram 2. This makes it possible to perform operations such as press fitting, molding, caulking, inspection, welding / joining, assembling, and cutting by using the servo press 10. In FIG. 1, a plug 12 is attached to the tip of the ram 2, and by lowering the ram 2, the plug 12 can be press-fitted into the recess of the molded product which is the work 13.

In the present embodiment, the terms simply position and speed mean the position of ram 2 and the speed of ram 2. The position of the ram 2 is the position of the ram 2 that reciprocates linearly, for example, the amount of displacement from the start position (origin position) of the descent of the ram 2, and this definition is used in this embodiment. The speed of the ram 2 is the speed at which the ram 2 descends toward the work, or the speed at which the ram 2 rises toward the start position. The speed at which the ram 2 descends includes the speed after the ram 2 comes into contact with the work 13.

The contact position is a position where the ram 2 or parts, jigs, etc. attached to the ram 2 come into contact with the work 13. In the present embodiment, when the ram 2 comes into contact with the work 13, it also includes contact with the work 13 such as parts and jigs attached to the ram 2. Further, in the present embodiment, the load is a load applied to the ram 2 from the outside.

In FIG. 1, the operation terminal 60 commands various commands to the servo press controller 40. The servo press controller 40 gives a command to the motor drive unit 50 based on a command from the operation terminal 60, a load information detected by the load cell 9, and an encoder pulse from the encoder 11. As a result, the motor current is controlled and the servo press 10 is driven and controlled. The encoder pulse is also input to the motor drive unit 50, and the motor current is appropriately corrected by feedback control.

Hereinafter, the servo press controller 40 will be specifically described with reference to FIG. FIG. 2 is a block diagram showing the configuration of the servo press controller 40. The communication command interpretation unit 41 interprets the communication command exchanged with the operation terminal 60 (see FIG. 1), and inputs / outputs commands and data to each unit of the servo press controller 40.

The position / speed conversion unit 42 is a part that converts the encoder pulse from the encoder 11 (see FIG. 1) into the position / speed of the ram 2. The position of the ram 2 is calculated by accumulating encoder pulses. The speed of the ram 2 is calculated by counting the encoder pulse with a fixed cycle, but it may be calculated by counting the cycle between the encoder pulses with another constant clock. The former is suitable for high-speed operation, and the latter is suitable for low-speed operation.

The program execution unit 43 executes the program according to the program execution command issued from the communication command interpretation unit 41. The program consists of multiple steps, including motor drive commands, branch commands and save commands. The branch command is a command for branching the position / speed information from the position / speed conversion unit 42 and the load information from the load cell 9 to another step according to a condition. The save command is a command to save the position / velocity and load information as an execution result.

When executing the program, the tool characteristics stored in the tool characteristic storage unit 47 are referred to. The tool characteristics are characteristics related to the operating performance of the servo press 10, and in the present embodiment, they are the maximum thrust, the maximum stroke, and the maximum speed, which are the limit values of the servo press 10 as a tool. To protect the servo press 10, the program is run so that these limits are not exceeded.

Tool characteristics are stored in the tool characteristic storage unit 47 by a tool characteristic storage command issued from the communication command interpretation unit 41. Further, the tool characteristics saved by the tool characteristic acquisition command issued from the communication command interpretation unit 41 are output to the communication command interpretation unit 41.

The program execution result storage unit 44 stores the program execution result output from the program execution unit 43. This program execution result is output to the communication command interpretation unit 41 by the program execution result acquisition command issued from the communication command interpretation unit 41.

The program storage unit 45 stores the program output from the operation terminal 60 of FIG. 1 by the program storage command issued from the communication command interpretation unit 41, and a plurality of programs are assigned program numbers to equal areas and stored. (See FIG. 5). The program selection unit 46 copies the designated program from the program storage unit 45 to the program execution unit 43 by the program selection command issued from the communication command interpretation unit 41.

FIG. 3 is a block diagram showing the configuration of the operation terminal 60. The operation terminal 60 is a computer, and may be a dedicated machine or a general-purpose machine such as a personal computer. The operation terminal 60 exchanges various commands with the servo press controller 40 of FIG. 2 via the communication control unit 61. The information input to the operation terminal 60 via the input unit 72 and the information received from the servo press controller 40 are input to the program editing unit 62, and the final target program is created.

The template program storage unit 70 of the operation terminal 60 stores the template of the work characteristic exploration program and the template of the final target program (see FIG. 5). By setting various parameters of these templates, the final work characteristic exploration program and the final final purpose program are completed. Hereinafter, for convenience, even in the state of the template in which the setting of various parameters has not been completed, it is referred to as a work characteristic exploration program and a final purpose program. The functions of the other parts of the operation terminal 60 will be appropriately described together with the process of creating the final target program.

FIG. 4 is a flowchart showing an outline of the process of creating the final target program. FIG. 4 is a schematic diagram in which the process is omitted as appropriate, and the outline will be described with reference to this figure, and the details will be described later with reference to FIGS. 6 and 7. The input of the required parameters (step 100) is input by the user. There are two required parameters, a target value and a limit value. These values are values related to the position of the ram 2 or the load received by the ram 2. In the present embodiment, the target values are the target load, which is a value related to the load received by the ram 2, and the target position and the target press-fitting length, which are values related to the position of the ram 2. The target load is the target value of the load when the press-fitting work is managed by the load value, the target position is the target value of the position when the press-fitting work is managed by the position of the servo press 10, and the target press-fitting length is the contact. This is the target value of the press-fit length from the position to the final press-fit position.

The limit value is a limit position (stroke limit) with respect to the target load, and is a limit load with respect to the target value position and the target press-fit length. The servo press program creation system 1 creates the final target program after executing the work characteristic exploration program, but in order to execute these programs, other parameters are required in addition to the essential parameters. For other parameters, the recommended values and acquired work characteristics are used as described later. Therefore, of the plurality of parameters required for the work characteristic exploration program and the final target program, two parameters, the target value and the limit value, are sufficient for the user to input. The details of this point will be described later.

In FIG. 4, when the required parameters are input, a work characteristic exploration program is created through various steps, and the program is executed (step 101). FIG. 5 shows a list of template programs stored in the template program storage unit. As the work characteristic exploration program 80, a load target program 81, a position target program 82, and a press-fit target program 83 are prepared.

The selection of the work characteristic exploration program to be executed is determined according to the type of target value of the input required parameters. If the type of the required parameter is the target load, the load target program 81 after reflecting the parameter is executed, and if the type of the required parameter is the target position, the position target program 82 after reflecting the parameter is executed, and the type of the required parameter is If it is the target press-fit length, the press-fit target program 83 after reflecting the parameters is executed.

Work characteristics are acquired by executing the work characteristic exploration program (step 102). The work characteristics are characteristics related to the position of the ram 2 when the servo press 10 is driven and the load received by the ram 2. In the present embodiment, the contact position between the ram 2 and the work 13 and the position when the work 13 is press-fitted to the target load. Or, it is the load when press-fitting to the target position. The final target program is created based on the acquired work characteristics and the like (step 103).

In FIG. 5, a load target program 91, a position target program 92, and a press-fit target program 93 are prepared as templates for the final target program 90. The target for creating the final objective program corresponds to the work characteristic exploration program that is executed according to the type of target value of the input required parameters. When the load target program 81 after reflecting the parameters is executed, the target for creating the final target program is the load target program 91. Similarly, when the position target program 82 after reflecting the parameters is executed, the final target program is created. The target is the position target program 92, and when the press-fit target program 83 after reflecting the parameters is executed, the target for creating the final target program is the press-fit target program 93.

The acquisition of work characteristics by executing the work characteristic exploration program will be described with reference to FIG. FIG. 6 is a flowchart showing an execution process by the work characteristic exploration program. As shown in FIG. 5, three types of work characteristic exploration program templates (reference numerals 81 to 83) are prepared, and when the work characteristic exploration program is executed, the completed state in which unset parameters are set. It has become.

Of the three types of work characteristic exploration program templates, one work characteristic exploration program template corresponding to the type of target value of the essential parameter input in step 100 of FIG. 4 is completed by setting the parameters. Execute the work characteristic exploration program. The flowchart of FIG. 6 is a flowchart common to the three types of work characteristic exploration programs.

At the start, the ram 2 is lowered at a low speed (step 200). It is determined whether or not the load exceeds the contact detection load (step 201), and if the load does not exceed the contact detection load, the descent is continued, and if the load exceeds the contact detection load, the contact position at that time is saved (step 201). Step 202). The contact detection load is a load value for recognizing the contact between the ram 2 and the work 13, and as described above, the contact position is the position where the ram 2 comes into contact with the work 13.

After that, the descent of the ram 2 is continued while determining whether or not the limit value has been exceeded (step 203) and while determining whether or not the target value has been reached (step 204). When the target value is reached (step 204), the position and load at that time are saved (step 205). The target value is the target value input in step 100 of FIG. 4, which is the target load, the target position, or the target press-fit length, and the limit value is the limit value input in the same step. Is the limit position, and is the limit load for the target value position and the target press-fit length.

After reaching the target value, the descent of the ram 2 is stopped, and the ram 2 is raised to the descent start position (step 206). If it is determined that the limit value has been exceeded before reaching the target value during the descent of ram 2 (step 203), a message indicating that the limit has been exceeded is displayed (step 207), and the descent of ram 2 is immediately stopped. Then, the ram is raised to the descent start position (step 206).

By executing the work characteristic exploration program as described above, it is possible to acquire three work characteristics: the contact position, the position when press-fitting to the target load (peak stroke), and the load when press-fitting to the target position (peak load). Yes (steps 202, 205). After acquiring the work characteristics, the process shifts to the creation of the final target program.

Hereinafter, the entire process of creating the final target program by the servo press program creating system 1 will be described with reference to FIGS. 7 to 13. FIG. 7 shows a flowchart of a procedure for creating a final target program by the servo press program creating system 1. 8 to 13 show the display screen of the operation terminal.

In FIG. 7, after the start, the tool characteristics are acquired (step 300), and the recommended parameters are calculated based on the acquired tool characteristics (step 301). FIG. 8 shows a tool selection screen, in which the selected tool type (model name) and numerical values of tool characteristics (maximum load, maximum stroke, maximum speed) are displayed. The tool characteristics are received from the tool characteristic storage unit 47 of the servo press controller 40 shown in FIG. 2 by the tool characteristic receiving unit 63 of the operation terminal 60 shown in FIG. The recommended parameter is calculated by the recommended parameter calculation unit 65 of the operation terminal 60.

The recommended parameters are reflected in the work characteristic exploration program and the final objective program. As a result, these programs are executed so that the servo press 10 does not exceed the tool characteristics (maximum load, maximum stroke, maximum speed). The tool characteristics are characteristics peculiar to each tool type of the servo press 10, and are not numerical values calculated by the user by measurement or the like, and the tool characteristics can be stored in advance in the tool characteristic storage unit 47. As described above, since the recommended parameter calculation unit 65 calculates the recommended parameter with reference to the tool characteristics, it is not necessary for the user to input a numerical value when calculating the recommended parameter.

After calculating the recommended parameters, the parameter input range calculation unit 64 of the operation terminal 60 of FIG. 3 calculates the parameter input range (step 302). This is because the recommended parameters can be changed by the user, so the range of change is limited to the appropriate range derived from the tool characteristics.

After selecting the tool type in FIG. 8, the user selects an operation target (step 303). FIG. 9 shows a screen for selecting an operation target. There are three patterns of operation targets: load target, position target, and press-fit length target. In FIG. 9, the load target is selected. Since the work characteristic exploration program to be executed and the final target program to be created differ depending on the input operation target, the operation target selection unit 71 has the work characteristics stored in the template program storage unit 70 in FIG. One of each of the exploration program (see reference numerals 81 to 83 in FIG. 5) and the final target program (see reference numerals 91 to 93 in FIG. 5) is selected and sent to the program editorial unit 62.

After selecting the operating goal, the user inputs the required parameters (step 304). FIG. 10 shows an input screen of essential parameters, and the numerical values of the target load and the stroke limit have already been input. The input essential parameters are sent to the program editing unit 62 via the input unit 72 of FIG.

After inputting the required parameters, the user confirms and corrects other parameters of the work characteristic exploration program (step 305). FIG. 11 shows a display screen of other parameters of the work characteristic exploration problem. The values of these parameters were calculated by the recommended parameter calculation unit 65 of FIG. 3 in the recommended parameter calculation step of step 301.

The user can check the displayed parameters and correct them to the desired values different from the displayed values. The modified parameters are sent to the program editing unit 62 via the parameter manual editing unit 66, and if the modified parameters are within the input range, the program editing unit 62 corrects the parameters of the work characteristic exploration program. Change to.

In FIG. 11, the descending speed, the contact detection load, and the ascending speed are set. The descent speed is the descent speed of the ram 2 in step 200 of FIG. 6, and the descent speed is set to a low speed because the contact position is searched while the ram 2 is lowered when the work characteristic exploration program is executed. The contact detection load is the contact detection load in step 201 of FIG. 6, and is a load value for recognizing the contact between the ram 2 and the work 13 as described above. If the contact detection load is too small, there is a risk of erroneous detection, and if it is too large, the contact position cannot be accurately obtained. Therefore, a value is set in consideration of these. The ascending speed is the ascending speed when the ram 2 in step 206 of FIG. 6 returns to the descending start position.

At the completion of step 305, all the parameters of the work characteristic exploration program have been determined. Therefore, in FIG. 3, the program transmission unit 68 of the operation terminal 60 transmits the work characteristic exploration program to the servo press controller 40 of FIG. 1 (step). 306). The work characteristic exploration problem is stored in the program storage unit 45 of the servo press controller 40 in FIG.

Subsequently, the program execution command unit 67 of the operation terminal 60 of FIG. 3 commands the servo press controller 40 of FIG. 2 to execute the work characteristic exploration program, and the program execution unit 43 of the servo press controller 40 instructs the servo press controller 40 to execute the work characteristic exploration program. Is executed (step 307).

After executing the work characteristic exploration program, it is determined whether or not the work characteristics have been successfully acquired (step 308). If the work characteristics are successfully acquired, the acquired work characteristics are reflected in the parameters of the final target program (step 309). As a result, the creation of the final target program is once completed. The work characteristics are sent from the servo press controller 40 of FIG. 2 to the operation terminal 30 of FIG. 3, and the final target program is created at the operation terminal 30.

More specifically, the work characteristics detected by the servo press 10 are input to the program execution unit 43 in FIG. 2 and stored in the program execution result storage unit 44. The work characteristics stored here are received by the program execution result receiving unit 69 of the operation terminal 60 and sent to the program editing unit 62 based on the program execution result acquisition command from the program execution command unit 67 in FIG. In the program editorial unit 62, other parameters of the final target program are determined, and the final target program is created.

FIG. 12 is a display screen of the exploration result, and the values of the contact load, the peak load, and the peak stroke, which are the acquired work characteristics, are displayed. FIG. 13 is a screen for confirming parameters of the final target program. The user confirms and corrects other parameters of the final target program on the display screen (step 310). As in the case of the work characteristic exploration problem, the user can check the displayed parameters and correct them to the desired values different from the displayed values. The modified parameter is sent to the program editing unit 62 via the parameter manual editing unit 66, and if the modified parameter is within the input range, the program editing unit 62 changes the parameter of the final target program to the modified parameter. change.

In FIG. 13, the target load and the stroke limit are values input by the user on the input screen of the essential parameters of FIG. The value of the contact position in FIG. 13 is the value of the contact position in the exploration result of FIG. The value of the contact detection load in FIG. 13 is the value of the contact detection load on the display screen of other parameters of the work characteristic exploration program of FIG. 11, and as described above, the recommended parameter calculation unit in the calculation step of the recommended parameter in step 301. 65 is calculated. In FIG. 13, the approach speed, the foreign matter detection load, the contact speed, the press-fitting speed, the return speed, the return position, and the holding time are also calculated by the recommended parameter calculation unit 65 in the recommended parameter calculation step of step 301. The definition of approach speed and the like will be described below.

The approach speed approach is a no-load high-speed operation from the start of descent to just before the ram 2 comes into contact with the work 13, and the approach speed is the speed used in the approach. The approach speed is set as high as possible in order to shorten the working time. The foreign matter detection load is a value that is set because it is necessary to stop immediately if an obstacle is accidentally touched during the approach, and is a load value that is determined to be in contact with the obstacle.

The contact speed is the speed at which the ram 2 and the work 13 come into contact with each other. When the ram 2 comes into contact with the work 13 at high speed, an impact load is generated, and deformation of the work 13, jig, etc. due to the impact load should be avoided. The impact load also shortens the life of the mechanical parts of the servo press 10. Therefore, the impact load should be kept as small as possible. With these factors in mind, the contact speed is usually set to a small value.

The press-fitting speed is the operating speed from the contact of the ram 2 with the work 13 to the target load or the target position. The holding time is the time from reaching the target value to resting at that position. The return position is a standby position that returns after the press-fitting operation is completed, and has the same meaning as the lowering start position. The return speed is the speed at which the product returns to the return position after press fitting, and is set as high as the approach speed because there is no load.

Although various parameters are set in FIG. 13, the two parameters input by the user are the target load and the stroke limit. Other parameters are the values calculated from the tool characteristics input in advance in the tool characteristic storage unit 47 of the servo press controller 40 shown in FIG. 2, or the work characteristics (contact position) acquired by executing the work characteristic exploration program. The value. Therefore, the user's input to create the final goal program requires a minimum of two essential parameters, and no special skill is required to create the program, and the labor for creating the program is reduced. Become.

When the final target program is created, the final target program is executed (step 311), and the work by the servo press 10 is performed. The execution result is determined (step 312), and if the execution result is not good, the target value is reviewed (step 313). If the target value is inappropriate, the process returns to step 304, the values of the required parameters are corrected as appropriate, and steps 304 and subsequent steps are repeated. If the target value is appropriate, the process returns to step 310, other parameters of the final target program are modified as appropriate, and steps 310 and subsequent steps are repeated.

Although the embodiment of the present invention has been described above, the embodiment is an example and may be appropriately modified. For example, in the above-described embodiment, the servo press controller 40 of FIG. 2 and the operation terminal 60 of FIG. 3 have independent configurations, but the operation terminal 60 includes all or a part of the configuration of the servo press controller 40. May be good.

1 Servo press program creation system 2 Ram 6 Servo motor 10 Servo press 11 Encoder 12 Plug 13 Work 40 Servo press controller 43 Program execution unit 47 Tool characteristic storage unit 50 Motor drive unit 60 Operation terminal 62 Program editing unit 64 Parameter input range calculation unit 70 Template program storage unit 72 Input unit

Claims (4)

A servo press program creation system that creates a final purpose program for controlling the servo motor so as to achieve the user's purpose for the servo press in which the ram is driven by the servo motor.
Input section where required parameters are input and
A recommended parameter calculation unit that calculates parameters other than the required parameters, and
A program editorial department that has a program creation function,
A program execution unit that controls the drive of the servo press and acquires work characteristics that are characteristics related to the position of the ram and the load received by the ram when the servo press is driven.
A tool characteristic storage unit that stores tool characteristics, which are characteristics related to the operating performance of the servo press, and a tool characteristic storage unit.
It is provided with a template of a work characteristic exploration program for exploring the work characteristics and a template program storage unit in which the template of the final target program is stored.
The required parameters are the target value and the limit value.
The target value and the limit value are values related to the position of the ram or the load received by the ram.
The recommended parameter calculation unit calculates recommended parameters to be used for the template of the work characteristic exploration program and the template of the final target program based on the tool characteristics.
The program execution unit executes the work characteristic exploration program in which the tool characteristics, the essential parameters, and the recommended parameters are reflected in the template of the work characteristic exploration program to acquire the work characteristics.
The servo press program creation system is characterized in that the program editorial unit creates the final target program by reflecting the essential parameters, the recommended parameters, and the acquired work characteristics in the template of the final target program. The servo press program creation system according to claim 1, wherein a plurality of templates for the work characteristic exploration program and the template for the final target program are prepared for each type of the target value. When the target value is a value related to the position of the ram, the limit value is a value related to the load received by the ram, and when the target value is a value related to the load received by the ram, the limit value is a value related to the load received by the ram. The servo press program creation system according to claim 1 or 2, which is a value related to a position. The servo press program creation system according to any one of claims 1 to 3, wherein the recommended parameter can be modified by input of a user, and further includes a parameter input range calculation unit for calculating an input range of the recommended parameter. ..

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