TW201615393A - Servo press monitoring method and device thereof - Google Patents

Abstract

The present invention provides a servo press monitoring method, which comprises: providing an ideal shaping curve that is built in the servo press to be executed by the servo press; using a signal of the ideal shaping curve to drive a servo motor to generate a torque for driving a power mechanism rotatably coupled to the servo press in order to conduct a motion corresponding to the ideal shaping curve; using a crankshaft angle detection unit to receive a crankshaft angle of the power mechanism so as to acquire an actual position parameter of the power mechanism and using a torque feedback unit to receive a shaping force generated in a shaping mold; and using an output force determination unit to calculate an actual shaping position according to the actual position parameter and the shaping force and calculating an actual shaping curve according to the actual shaping position and the operation speed of the servo motor, so as to determine if the operation of the power mechanism is normal or not by comparing the ideal shaping curve and the actual shaping curve.

Description

Servo punch monitoring method and device thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a servo punch monitoring method, and more particularly to an actual forming force required for stamping using a servo press, and an actual forming curve calculated from the operating speed of the servo motor, and then compared with an ideal forming curve. It is judged whether the related components such as the forming die, the servo punch or the servo motor are abnormal.

In general, when the die of the servo punch presses, the accuracy of the mold is deteriorated with the use of the mold, or the waste is accumulated in the cavity, so that when the die is pressed, the interference of the die is impeded, and the punching is inhibited. The product quality is poor or the mold is damaged.

In the prior art, for example, US Pat. No. 7,434,505 B2 provides a servo press control system and a servo press control method, which are mainly used for controlling a servo press, and a servo motor drives a rotating mechanism to transmit power to the slip through the connecting rod. On the block, the vertical sliding of the mold is controlled, wherein the rotation of the servo motor is controlled based on the offset εp of the slider position and the motor speed command rm based on the offset εp of the position of the speed ratio of the slider.

However, in the conventional servo press, there is no system monitoring for the punching system, and PLC programming is used to drive the motor. There is no specific monitoring of the load caused by the forming force of the mold during the overall process development. Safety protection, mostly using traditional shutters for user safety protection. Therefore, it is not easy for the user to understand the load of the mold design on site, and it is often produced under improper use conditions, and lacks the system to feedback the size of the overall system at that time.

The object of the present invention is to provide a servo punch monitoring method for performing the operation of the ideal curve by providing an ideal forming curve to drive a servo punch, and then detecting the angle of the crankshaft to obtain a mold insertion position of the forming mold, and taking the forming mold The forming force generated by the workpiece to be processed is finally calculated by the correspondence between the servo motor, the mold position and the forming force, and compared with the ideal forming curve, thereby confirming the servo punching operation. Whether an abnormality occurs during stamping as a judgment of whether the process system should be shut down to observe the mold condition.

The servo punch monitoring method of the present invention comprises: providing an ideal forming curve built into the servo punch for the servo punch; and driving the servo motor to generate torque to drive the power mechanism pivoted to the servo punch by using the signal of the ideal forming curve; The operation corresponding to the ideal forming curve is performed; the crank angle of the power mechanism is received by the crank angle detecting unit, the actual position parameter of the power mechanism is obtained, and the to-be-processed part in the forming mold is received by the torque feedback unit. The forming force generated by the output force judging unit calculates the actual forming position and the forming force, and calculates the actual forming curve according to the actual forming position and the running speed of the servo motor, and compares the ideal forming curve with the actual forming curve. Determine whether the operation of the power mechanism is abnormal.

As described above, in one embodiment, the ideal forming curve includes a curve of punching, bending, drawing or forging.

As described above, in an embodiment, the power mechanism includes a crankshaft or a connecting rod, and the crank angle detecting unit is electrically connected to the crankshaft or the connecting rod for sensing the rotation angle of the crankshaft or the connecting rod to obtain the position corresponding to the slider. Actual positional parameters.

As described above, in an embodiment, the result of the power output determination unit determining whether the operation of the power mechanism is abnormal is displayed on the human-machine interface, and the human-machine interface is used to control whether the power mechanism continues to operate.

As described above, in an embodiment, the method further includes: sensing a temperature of the servo motor to generate a temperature sensing value, and determining, by the environmental control unit, the temperature standard value according to the temperature sensing value and the normal temperature of the motor operation. Is the temperature of the servo motor abnormal?

As described above, in an embodiment, the environment control unit determines whether the temperature of the servo motor is abnormal, is displayed on the human-machine interface, and uses the human-machine interface to control whether the servo motor continues to operate.

Another object of the present invention is to provide a servo punch monitoring device, comprising: a control unit for outputting an ideal forming curve of a servo punch to be executed by a servo punch to drive a servo motor to generate torque; and a power mechanism Connected to the servo punch, the servo punch is driven by the torque to perform the operation corresponding to the ideal forming curve; the crank angle detecting unit is configured to sense the crank angle of the power mechanism to obtain the actual position parameter of the power mechanism; the torque feedback a unit for receiving a forming force generated by the forming die of the servo punching machine to be processed; the output determining unit is configured to calculate the actual positional parameter and the forming force to calculate the actual forming position, and according to the actual forming position and the servo motor The actual forming curve is calculated from the running speed, and the ideal forming curve and the actual forming curve are compared to determine whether the operation of the power mechanism is abnormal.

As described above, in an embodiment, wherein the power mechanism includes a crankshaft or a connecting rod, the crank angle detecting unit is electrically connected to the crankshaft or the connecting rod for sensing the rotation angle of the crankshaft or the connecting rod to obtain the position corresponding to the slider. Actual positional parameters.

As described above, in an embodiment, the human machine interface is further included to display whether the power determining unit determines whether the operation of the power mechanism is abnormal or not to control whether the power mechanism continues to operate.

As described above, in an embodiment, further comprising an environmental control unit, the temperature sensing value generated by the temperature sensor after sensing the servo motor, according to the temperature sensing value and one of normal temperatures when the motor operates The temperature standard value is used to determine whether the temperature of the servo motor is abnormal.

The servo punch monitoring method and device thereof of the present invention, which provides an ideal forming curve by a control unit to drive a servo punch to perform an action corresponding to an ideal curve, and then uses a crank angle detecting unit to detect an angle of the crankshaft to obtain an actual power mechanism. Position parameter, and using the torque feedback unit to take the forming force generated by the workpiece to be processed in the forming mold, and finally calculating the actual forming curve by the correspondence between the operating speed of the servo motor, the actual position parameter and the forming force. And compared with the ideal forming curve, thereby monitoring the servo punching machine to confirm whether the servo punching machine generates an abnormality when punching, as a judgment of whether the process system should stop and observe the mold condition.

In order to make the above and other objects, features, and advantages of the present invention more apparent, the following description will be made in conjunction with the accompanying drawings.

Please refer to FIG. 1 and FIG. 2. FIG. 1 is a flow chart of a servo punch monitoring method according to the present invention. 2 is a block diagram of a servo punch monitoring device in accordance with the present invention. First, the servo punch monitoring method of the present invention comprises the following steps: Step S100, the control unit 10 provides an ideal forming curve of the servo punch 40 to be executed by the servo punch 40; then, in step S110, the signal of the ideal forming curve is utilized. The servo motor 20 is driven to generate a torque 21 to drive the power mechanism 30 pivotally coupled to the servo press 40 to cause the servo press to perform an action corresponding to the ideal forming curve. That is, the control unit 10 outputs an ideal forming curve to be executed by the servo punch 40 to be built into the servo press 40 to drive the servo motor 20 to operate to generate a torque 21 to drive the power mechanism 30 pivotally coupled to the servo press 40, followed by power. The mechanism 30 drives the servo punch 40 according to the torque 21 to perform an action corresponding to the ideal forming curve, and performs a punching operation.

As described above, in one embodiment, the ideal forming curve includes a curve of punching, bending, drawing or forging.

3A to 3D, FIG. 3A is a schematic diagram showing the angle of crankshaft rotation of the servo punch monitoring device according to the present invention, and FIG. 3B is a graph of the stamping time of the forming die of the servo punch monitoring device according to the present invention, FIG. 3C Fig. 3D is a graph showing the position of the slider at the time of stamping of the forming die of the servo punch monitoring device according to the present invention, and Fig. 3D is a graph showing the position of the slider when the forming die of the servo punch monitoring device according to the present invention is pressed. In step S120, the crank angle detection unit 50 senses the crank angle in the power mechanism 30 for obtaining the actual position parameter of the power mechanism 30, that is, the power mechanism 30 includes a crankshaft or a connecting rod, and the crank angle detecting unit 50 is coupled to the crankshaft or connecting rod of the power mechanism 30 for sensing the angle of rotation of the crankshaft or the connecting rod to obtain an actual positional parameter corresponding to the position of the slider of the servo punch.

Next, the forming force generated by the workpiece to be processed is received by the torque feedback unit 60 when receiving the forming mold for punching.

In the last step S130, the output position determining unit 70 calculates the actual position and the forming force to calculate the actual forming position, and calculates the actual forming curve according to the actual forming position and the running speed of the servo motor, and compares the ideal forming curve with the actual forming curve. Determine if the operation of the power mechanism is abnormal.

As described above, in detail, as shown in FIG. 3A, for example, when the crank angle is rotated between 150 degrees and 180 degrees, the variation amount 42 is generated in comparison with the actual forming force curve of FIG. 3B and the ideal forming force curve. That is, at the angle 41 of the crankshaft rotation, the actual forming force is higher than the ideal forming force, so the actual forming force curve corresponding to the angle 41 has an overload phenomenon, and the angle 41 corresponds to the angle 31 of FIG. 3A, and the crank angle can be known. In the actual positional parameter corresponding to 150 to 180 hours, the position where the mold is overloaded can be formed.

3C, angle 61 corresponds to angle 31 of FIG. 3A, and it can be seen that at crank angle 61, the actual servo motor speed of the servo motor is less than the ideal servo motor speed, between the ideal servo motor speed and the actual servo motor speed curve. A variation amount 44 is generated, and it can be judged that the motor rotation speed is decreased when the crank angle is 150 degrees to 180 degrees. Therefore, it is further known that an abnormality occurs in the crank angle 61, and then, in FIG. 3D, based on the actual position parameter, the actual forming force curve, and the actual servo. The actual rotational speed is calculated from the motor rotational speed. According to the actual forming curve, the ideal forming curve can be compared. It can be determined that the crank angle is between 150 and 180, and the variation is 43. It is also known that the servo angle corresponds to the servo at 150 degrees to 180 degrees. There is an abnormality in the position of the slider of the punch press or the position of the forming mold, and the mold should be stopped to observe the condition.

As described above, in an embodiment, the result of the power-force determination unit 70 determining whether the operation of the power mechanism 30 is abnormal is further displayed on the human-machine interface 80, and the human-machine interface 80 is used to control whether the power mechanism 30 continues. Operation.

As described above, in an embodiment, the temperature sensor is further included to sense the temperature of the servo motor to generate a temperature sensing value, the temperature sensor is connected to the environment control unit 90, and is controlled by the environment control unit 90. The temperature sensing value and the temperature standard value of the normal operating temperature when the motor is operating to determine whether the temperature of the servo motor is abnormal.

As described above, in an embodiment, the environment control unit 90 determines whether the temperature of the servo motor is abnormal, is displayed on the human-machine interface, and uses the human-machine interface to control whether the servo motor continues to operate.

The servo punch monitoring method and device thereof of the present invention, which provides an ideal forming curve by a control unit to drive a servo punch to perform an action corresponding to an ideal curve, and then uses a crank angle detecting unit to detect an angle of the crankshaft to obtain an actual power mechanism. Position parameter, and using the torque feedback unit to take the forming force generated by the workpiece to be processed in the forming mold, and finally calculating the actual forming curve by the correspondence between the operating speed of the servo motor, the actual position parameter and the forming force. And compared with the ideal forming curve, thereby monitoring the servo punching machine to confirm whether the servo punching machine generates an abnormality when punching, as a judgment of whether the process system should stop and observe the mold condition.

In summary, it is merely described that the present invention is an implementation or embodiment of the technical means employed to solve the problem, and is not intended to limit the scope of implementation of the present patent. Any change or modification that is consistent with the scope of the patent application scope of this creation or the scope of the patent creation is covered by the scope of the creation patent.

10‧‧‧Control unit
20‧‧‧Servo motor
21‧‧‧ Torque
30‧‧‧Power Agency
31‧‧‧ angle
40‧‧‧Servo Punch
41‧‧‧ angle
42‧‧‧variation
43‧‧‧variation
44‧‧‧variation
50‧‧‧Crankshaft angle detection unit
51‧‧‧ angle
60‧‧‧Torque feedback unit
61‧‧‧ angle
70‧‧‧Output judgment unit
80‧‧‧Human Machine Interface
90‧‧‧Environmental Control Unit Steps S100~S130‧‧‧ Servo Punch Monitoring Method

[Fig. 1] A flow chart of a servo press monitoring method according to the present invention. Fig. 2 is a block diagram of a servo punch monitoring device according to the present invention. Fig. 3A is a schematic perspective view showing the cranking of the servo press monitoring device according to the present invention. Fig. 3B is a graph showing the stamping time of a forming die of the servo punch monitoring device according to the present invention. Fig. 3C is a graph showing the motor running speed when the forming die of the servo punch monitoring device according to the present invention is pressed. Fig. 3D is a graph showing the position of a slider when a forming die of a servo punch monitoring device according to the present invention is pressed.

Step S100~S130‧‧‧ Servo Punch Monitoring Method

Claims (10)

A servo punch monitoring method includes: providing an ideal forming curve of a servo punch to be executed by the servo punch; using the signal of the ideal forming curve to drive a servo motor to generate a torque to drive the pivoting to the servo punch a driving mechanism for performing an action corresponding to the ideal forming curve; receiving a crank angle of the power mechanism by a crank angle detecting unit, obtaining an actual position parameter of the power mechanism, and receiving by a torque feedback unit a forming force generated by the workpiece to be processed in the forming mold; the actual position parameter and the forming force are calculated by the output force judging unit to be an actual forming position, and according to the actual forming position and the running speed of the servo motor An actual forming curve is calculated, and the ideal forming curve and the actual forming curve are compared to determine whether the operation of the power mechanism is abnormal. The servo punch monitoring method of claim 1, wherein the ideal forming curve comprises a curve of punching, bending, drawing or forging. The servo punch monitoring method of claim 1, wherein the power mechanism comprises a crankshaft or a connecting rod, and the crank angle detecting unit is electrically connected to the power unit for sensing a rotation angle of the crankshaft or the connecting rod to obtain a corresponding The actual positional parameter of the slider position. The servo punch monitoring method of claim 1, wherein the result of the power judgment unit determining whether the operation of the power mechanism is abnormal is displayed on a human-machine interface, and the human-machine interface is used to control whether the power mechanism is controlled. Continuous operation. For example, the servo punch monitoring method of claim 1 further includes: sensing a temperature of the servo motor to generate a temperature sensing value, and operating the unit according to the temperature sensing value and the normal operation of the motor by an environmental control unit; The temperature is a standard temperature value to determine whether the temperature of the servo motor is abnormal. The servo punch monitoring method of claim 5, wherein the environmental control unit further determines whether the temperature of the servo motor is abnormal, is displayed on a human machine interface, and uses the human machine interface to control whether the servo motor continues to operate. A servo punch monitoring device includes: a control unit for outputting an ideal forming curve of a servo punch to be executed by a servo punch to drive a servo motor to generate a torque; and a power mechanism pivotally connected thereto a servo punch, wherein the torque is used to drive the servo punch to perform an operation corresponding to the ideal forming curve; a crank angle detecting unit is configured to sense a crank angle of the power mechanism to obtain an actual position parameter of the power mechanism a torque feedback unit for receiving a forming force generated by the forming die of the servo punching machine to be processed; a force determining unit for calculating the actual positional parameter and the forming force to calculate an actual forming position, and An actual forming curve is calculated according to the actual forming position and the operating speed of the servo motor, and the ideal forming curve and the actual forming curve are compared to determine whether the operation of the power mechanism is abnormal. The servo punch monitoring device of claim 7, wherein the power mechanism includes a crankshaft or a connecting rod, and the crank angle detecting unit is disposed on the crankshaft or the connecting rod to sense a rotation angle of the crankshaft or the connecting rod. The actual positional parameter corresponding to the position of the slider is obtained. For example, the servo punch monitoring device of claim 7 further includes a human machine interface for displaying whether the power judging unit judges whether the operation of the power mechanism is abnormal or not to control whether the power mechanism continues to operate. The servo punch monitoring device of claim 7 further includes an environmental control unit, wherein the temperature sensing value generated by the temperature sensor after sensing the servo motor is based on the temperature sensing value and the motor operation time. The temperature standard value of one of the normal temperatures is used to determine whether the temperature of the servo motor is abnormal.