KR102126817B1 - System And Method For Synchronizing Of Press Machine - Google Patents

Abstract

The present invention relates to a press machine synchronization system using a general motor and a method thereof. The press machine synchronization system comprises a reference press machine and at least one subordinate press machine with the same composition as the reference press machine, wherein the reference press machine comprises: a press machine body comprising a wheel connected with a motor through a belt or chain to be rotated, a knuckle combined with the rotary shaft of the wheel, a slide reciprocated vertically by the knuckle, and a clutch provided on one side of the wheel; an inverter connected with the motor; an encoder provided on one side of the rotary shaft; and synchronization controllers connected with the inverter and the encoder to transmit and receive signals. The synchronization controllers are connected around a main synchronization controller in a star formation, and the synchronization controllers of the reference press machine and the subordinate press machine are connected individually through a wire or wirelessly. According to the present invention, in a process in which a plurality of press machines are prepared for consecutive press jobs, the slide cycle of each of the press machines is synchronized to reduce the standby time between press jobs, thereby increasing the reliability of work precision between consecutive processes. Also, since a general motor is used instead of a vector motor or vector inverter and a PWM type inverter is used, a cost reduction effect as well as an efficiency maximization effect through simplified composition can be brought about.

Description

System and method for synchronizing press devices using a general motor

The present invention relates to a synchronization system and method of a press device, and more specifically, a general motor capable of synchronizing the press cycle cycle and speed of each press device in a process line composed of a plurality of press devices to increase production and completeness of a precise product. It relates to a synchronization system and method of the press device using.

In general, the press device is a device that mainly performs plastic processing such as bending, throttling, and shearing using a mold, and is composed of a table on which the material is placed, a slide that reciprocates linearly, and a motor that drives the slide.

The type of press is divided into manpower press and power press, and power press is divided into mechanical press using mechanical power and hydraulic press using hydraulic power. The mechanical press has a faster processing speed than the hydraulic press and is advantageous in terms of productivity. Mechanical presses are driven by mechanisms such as cranks, eccentrics, toggles (knuckles), links, cams, etc., and are classified into crank presses, knuckle presses, and screw presses according to the classification by the driving mechanism.

Particularly, a plurality of press devices arranged in a process in which a plurality of plastic workings are sequentially performed on a single material each press cycle. That is, since the cycle of the slide that reciprocates to plasticize the material is different, the cycle of the corresponding press device is precisely controlled and the cycle is processed so that the process is carried out to the next press device after the process is completed in one press device. Real-time synchronization that can be accurately matched to the period is essential.

In order to solve this problem, in the Republic of Korea Patent Publication No. 10-1658899, as shown in Figure 1 of the present specification, a press for punching material and a feeder supplying the material to the press by one pitch in accordance with the operation of the press And a press unit including a tension unit for applying a back tension to the material in a direction opposite to the feed direction of the feeder at the front end of the press, but this is to introduce a material according to the cycle of one press device. As a device for this, the above-described problem cannot be solved in a process in which a plurality of press devices are provided to perform continuous press operations.

Republic of Korea Registered Patent Publication No. 10-1658899 (2016.09.13)

In order to solve the problems as described above, in the present invention, by synchronizing the press cycles of each press device in a process line consisting of a plurality of press devices, the waiting time of the process through the continuous press device and the operation error of the press device during the process An object of the present invention is to provide a synchronization system and method of a press device capable of preventing product defects.

As a configuration for achieving the purpose, a press device composed of a wheel connected to a motor and a belt or a gear, a slide rotating vertically through a rotational motion of a rotating shaft of the wheel, and a clutch provided on one side of the wheel The same configuration as the reference press device and the reference press device consisting of an inverter connected to the main body and the motor, an encoder provided on one side of the rotation, and a synchronization controller connected to the inverter and an encoder to exchange signals. It is composed of at least one slave press device is provided, and the synchronization controller is connected to a star-type network configuration around the main synchronization controller, wherein the reference press device and the synchronization controller of the slave press device are respectively connected by wire or wirelessly. It is a synchronization system of a press device using a general motor, characterized in that.

In another aspect of the present invention, the first step of setting the stroke per minute (SPM) through the main synchronization controller using the synchronization system of the press device configured as described above, and the SPM (Stroke of the reference press device in the first step) In the second step of applying Per Minute) to the synchronization controller, and when the Stroke Per Minute (SPM) set in the second step is equal to or greater than 0, the Stroke Per Minute (SPM) of the reference press device is reflected in the synchronization controller. According to ), the PWM (Pulse Width Modulation) control signal is transmitted to match the synchronization RPM (Revolution Per Minute), and the reference press device is driven by the PWM signal and the third step in which the inverter is driven, and the angle from the encoder of the reference press device. A pulse is generated, the fourth step of transmitting it to the synchronization controller, and the fifth step of applying the SPM (Stoke Per Minute) of the slave press device through the main synchronization controller and the SPM (Stoke Per Minute) set in the fifth step above When it is 0 or more, PWM (Pulse Width Modulation) control signal is transmitted to match the synchronization RPM (Revolution Per Minute) according to the Stroke Per Minute (SPM) reflected in the synchronization controller of the slave press device, and the inverter of the slave press device is driven. The seventh step and the fourth step and the fourth step and the fourth step and the third step and the sixth step is synchronized with the slave press device synchronized in the sixth step is driven to generate an angular pulse from the encoder of the slave press device, which is transmitted to the synchronization controller of the slave press device It is a synchronization method of a press device using a general motor, characterized in that it consists of an eighth step of comparing and synchronizing the angular pulse of the reference press device encoder and the angular pulse of the reference press device encoder transmitted to the synchronization controller in step 7.

In another aspect of the present invention, when the angle pulse of the reference press device encoder is greater than the angle pulse of the slave press device encoder in step 8, the PWM ratio of the inverter of the slave press device is increased by the synchronization controller, and the reference press device encoder When the angle pulse of is smaller than the encoder angle of the slave press device, the inverter PWM ratio of the slave press device is lowered by the synchronization controller, and when the angle pulse of the reference press device encoder is the same as the angle pulse of the slave press device encoder, the synchronization controller It is a synchronization method of a press device using a general motor, characterized in that it maintains the PWM ratio of the inverter of the slave press device.

As described above, the synchronization system and method of the press device of the present invention can reduce the waiting time between press processes by synchronizing the slide cycles of each press device in a process in which a plurality of press devices are provided and successive press operations are performed. And it can increase the reliability of the work precision between continuous processes, and also has the effect of improving productivity to maximize the completeness of the product.

In addition, it is possible to maximize efficiency through cost reduction effect and configuration simplification by using a general motor instead of a vector motor or a vector inverter and using a PWM type inverter.

1 is a block diagram of a conventional press device.
Figure 2 is a block diagram of a synchronization system of a press device according to the present invention.
Figure 3 is a flow chart of the synchronization method of the press device according to the present invention.

Figure 2 is a block diagram of a configuration of a synchronization system of a press device using a general motor according to the present invention. Referring to this, the configuration of a synchronization system of a press device according to the present invention is as follows.

In a synchronization system of a press device using a general motor, vertical reciprocating motion is performed through rotational motion of a rotating wheel (13) of the wheel (12) and the rotating wheel (12) connected to the motor (11) with a belt or gear. A press device main body 10 composed of a slide 15 and a clutch 15 provided on one side of the wheel 12; and an inverter 20 connected to the motor 11; and the rotating shaft ( 13) the encoder 30 provided on one side; And a synchronization controller 41 that is connected to the inverter 20 and the encoder 30 to exchange signals, and includes a reference press device 100, and at least one with the same configuration as the reference press device 100. It is composed of a slave press device 200 provided above; and the synchronization controller 41 is connected to a star-shaped network configuration around the main synchronization controller 40; the reference press device 100 and the slave press device It is a synchronization system of a press device using a general motor, characterized in that the synchronization controller 41 of 200 is connected to each wired or wirelessly.

The reference press 100 and the inverter 20 of the dependent press 200 may be configured as a PWM (Pulse Width Modulation) type inverter, and the reference press 100 and the encoder 30 of the dependent press 200 may be It can be composed of an incremental encoder. The PWM (Pulse Width Modulation) method controls the average voltage by changing the voltage output within a certain period at a constant rate (Duty), thereby enabling speed control of the motor.

Various known techniques such as a knuckle press structure or a crank press structure applied to a general press device may be applied to the slide 14 vertically reciprocating through the rotational motion of the rotating shaft 13.

In addition, the synchronization controller 41 may be provided in each of the reference press device 100 and the slave press device 200, and a main synchronization controller 40 for integrally controlling the same is provided to provide Stroke Per Minute (SPM) data. It may have a configuration that is connected to reflect and transmit it to each synchronization controller 41 to be applied.

For precision and automation of the press device, a method of controlling a drive unit by using a servo motor is used. However, such a servo-controlled press requires high cost and when introduced, it can perform in an inefficient production method because it exhibits higher performance than is required at the work site. Accordingly, in the case of using a non-servo motor such as an AC (alternating current) motor, which is a general motor, the main synchronization controller 40 through the configuration of the main synchronization controller 40 and the synchronization controller 41 of each press device connected thereto. ) By setting the SPM value and transmitting it to each synchronization controller 41, thereby reducing the cost through the configuration that the RPM of the general motor can be maintained in the PWM type inverter and reducing the cost of the press device optimized for the work site. You can use a synchronization system.

3 is a flowchart of a method for synchronizing a press device using a general motor according to the present invention, respectively, and the method for synchronizing a press device according to the present invention is as follows.

Connected to the motor 11 by a belt or a gear, the rotating wheel 12 and the rotating shaft 13 of the wheel 12 vertically reciprocate through the slide 14 and the wheel 12 on one side. A press device main body 10 composed of a clutch 15 provided; an inverter 20 connected to the motor 11; and an encoder 30 provided on one side of the rotating shaft 13; And a synchronization controller 41 which is connected to the encoder 30 to exchange signals. A reference press device 100 consisting of; and a dependent press device provided with at least one of the same configurations as the reference press device 100. (200); consisting of, the reference press device 100 and the synchronization controller 41 of the slave press device 200 is connected to each wired or wirelessly, or of a press device using a common motor, characterized in that In the synchronization method,

A first step (S10) of setting a stroke per minute (SPM) through the main synchronization controller 40; and a stroke controller per minute (SPM) of the reference press device 100 in the first step (S10) of the synchronization controller ( The second step (S20) applied to 41) and the SPM (Stroke Per Minute) set in the second step (S20) is equal to or greater than 0, the SPM (Stroke Per Minute) of the reference press device 100 is synchronized to the controller ( The PWM (Pulse Width Modulation) control signal is transmitted to match the synchronization revolution per minute (RPM) according to the stroke per minute (SPM) reflected in the third step (S30) in which the inverter 20 is driven; and the PWM A fourth step (S40) in which the reference press device 100 is driven by the signal and an angular pulse is generated from the encoder 30 of the reference press device 100 and transmits it to the synchronization controller 41; and the main synchronization controller Step 5 (S50) of applying the SPM (Stoke Per Minute) of the dependent press device 200 through (40); and the SPM (Stoke Per Minute) set in the fifth step (S50) of the above is 0 or more, The PWM (Pulse Width Modulation) control signal is transmitted to match the synchronization revolution per minute (RPM) according to the stroke per minute (SPM) reflected in the synchronization controller 41 of the slave press device 200, so that the The sixth step (S60) in which the inverter 20 is driven; and the dependent press device 200 synchronized in the sixth step (S60) is driven to generate an angle pulse from the encoder 30 of the dependent press device 200. Occurs, it is transmitted to the synchronization controller 41 of the seventh step (S70); and the fourth step (S40) and the seventh step (S70) to transmit it to the synchronization controller 41 of the slave press device 200 Standard frame Eight step (S80) to compare and synchronize the angular pulse of the encoder 100, the angular pulse of the encoder 30 and the slave press device 200, the encoder 30; press using a general motor, characterized in that consisting of This is how the device is synchronized.

When the synchronization method of the press device is applied to the synchronization system of the press device consisting of one reference press device 100 and seven dependent press devices 200 having the configuration described above, the eight press devices 100, which constitute the system, All of the slides 15) of the 200) are performed in the same way, so that the precision of the continuous process can be increased as compared to the case in which the slides are not applied, thereby showing the effect of improving productivity, maximizing the completeness of the product.

In addition, in the eighth step (S80), the angular pulse of the encoder 30 of the reference press device 100 and the angular pulse of the slave press device 200 and the encoder 30 are compared, and the slave press device 200 and the encoder 30 are compared. It is characterized in that the angle of the reference press device 100, the encoder 30, the angle of synchronization within the range of ±7.5 °.

And in the eighth step (S80), when the angular pulse of the encoder 30 of the reference press device 100 is greater than the angular pulse of the encoder 30 of the slave press device 200, the slave press device by the synchronization controller 41 When the inverter 20 of the 200 increases the PWM ratio, and the angle pulse of the reference press device 100 encoder 30 is smaller than the slave press device 200 encoder angle, the slave press device by the synchronization controller 41 ( When the PWM pulse of the inverter 20 of the inverter 20 is lowered and the angle pulse of the reference press device 100 encoder 30 is the same as the angle pulse of the slave press device 200 encoder 30, the synchronization controller 41 It is a synchronization method of a press device using a general motor, characterized in that to maintain the PWM ratio of the inverter 20 of the slave press device 200.

Although the present invention has been illustrated and described in connection with specific embodiments and application examples, it is common knowledge in the art that various modifications and changes are possible without departing from the spirit and scope of the invention as indicated by the appended claims. Anyone who has a will easily know.

10. Press unit body 11. Motor
12. Wheel 13. Rotating shaft
14. Slide 15. Clutch
20. Inverter 30. Encoder
40. Main synchronization controller 41. Synchronization controller
100. Reference press device 200. Subordinate press device
S10. Step 1 S20. Stage 2
S30. Third stage S40. Stage 4
S50. Step 5 S60. Step 6
S70. Step 7 S80. Stage 8

Claims (6)

In the synchronization system of the press device using a general motor,
A slide 14 and a wheel 12 that vertically reciprocate through the rotational motion of the rotating wheel 13 of the wheel 12 and the wheel 12 connected to the motor 11 by a belt or gear, and the wheel 12 Press device body 10 consisting of a clutch 15 provided on the side; And
An inverter 20 connected to the motor 11; and
An encoder 30 provided on one side of the rotating shaft 13; And
A reference press device 100 consisting of; a synchronization controller 41 connected to the inverter 20 and the encoder 30 to exchange signals; and
It is composed of; and the dependent press device 200 is provided with at least one or more of the same configuration as the reference press device 100 of
The synchronization controller 41 is connected to the main synchronization controller 40; star-shaped network configuration around the center,
Synchronization system of a press device using a general motor, characterized in that the reference controller (100) and the synchronization controller (41) of the slave press device (200) are respectively connected by wire or wirelessly. According to claim 1,
The reference press 100 and the inverter 20 of the dependent press 200 is a PWM (Pulse Width Modulation) type synchronization system of a press device using a general motor, characterized in that the inverter. According to claim 1,
The reference press 100 and the encoder 30 of the dependent press 200 is a synchronization system of a press device using a general motor, characterized in that an incremental type encoder. Connected to the motor 11 by a belt or a gear, the rotating wheel 12 and the rotating shaft 13 of the wheel 12 vertically reciprocate through the slide 14 and the wheel 12 on one side. A press device main body 10 composed of a clutch 15 provided; an inverter 20 connected to the motor 11; and an encoder 30 provided on one side of the rotating shaft 13; And a synchronization controller 41 which is connected to the encoder 30 to exchange signals. A reference press device 100 consisting of; and a dependent press device provided with at least one of the same configurations as the reference press device 100. (200); consisting of, the reference press device 100 and the synchronization controller 41 of the slave press device 200 is connected to each of the wired or wirelessly or integral of the press device using a common motor In the synchronization method,
A first step of setting a stroke per minute (SPM) through the main synchronization controller 40 (S10); and
A second step (S20) of applying a Stroke Per Minute (SPM) of the reference press device 100 to the synchronization controller 41 in the first step (S10); and
When the stroke per minute (SPM) set in the second step (S20) is 0 or more, the stroke per minute (SPM) of the reference press device 100 is synchronized according to the stroke per minute (SPM) reflected in the synchronization controller 41 PWM (Pulse Width Modulation) control signal is transmitted to meet the Revolution Per Minute (RPM), the third step (S30) in which the inverter 20 is driven; and
A fourth step (S40) in which the reference press device 100 is driven by the PWM signal and an angular pulse is generated in the encoder 30 of the reference press device 100 and transmits it to the synchronization controller 41; and
A fifth step (S50) of applying a SPM (Stoke Per Minute) of the slave press device 200 through the main synchronization controller 40; and
When the SPM (Stoke Per Minute) set in the fifth step (S50) is equal to or greater than 0, the synchronization RPM (Revolution Per Minute) according to the SPM (Stroke Per Minute) reflected in the synchronization controller 41 of the slave press device 200 PWM (Pulse Width Modulation) control signal is transmitted to match the sixth step (S60) of the inverter 20 of the slave press device 200 is driven; and
The slave press device 200 synchronized in the sixth step (S60) is driven to generate an angular pulse in the encoder 30 of the slave press device 200, and the synchronization controller 41 of the slave press device 200 Step 7 (S70) for transmitting to;
Angle pulses of the encoder 30 of the reference press device 100 and the angle pulses of the encoder 30 of the dependent press device 200 transmitted from the fourth step S40 and the seventh step S70 to the synchronization controller 41. The eighth step of synchronizing by comparing (S80); Synchronization method of a press device using a general motor, characterized in that consisting of. The method of claim 4,
In the eighth step (S80), the angle pulse of the encoder 30 of the reference press device 100 and the angle pulse of the slave press device 200 and the encoder 30 are compared, and the angle of the encoder 30 of the slave press device 200 Synchronization method of a press device using a general motor, characterized in that the reference press device 100, the encoder 30, the synchronization within the range of ±7.5 ° angle. The method of claim 4 or 5,
In the eighth step (S80), when the angle pulse of the encoder 30 of the reference press device 100 is greater than the angle pulse of the slave press device 200, the encoder 30, the slave press device by the synchronization controller 41 ( 200) increases the PWM ratio of the inverter (20),
When the angle pulse of the encoder 30 of the reference press device 100 is smaller than the encoder angle of the slave press device 200, the PWM ratio of the inverter 20 of the slave press device 200 is lowered by the synchronization controller 41,
When the angular pulse of the reference press device 100 and the encoder 30 is equal to the angular pulse of the slave press device 200 and the encoder 30, the synchronization controller 41 enables the inverter 20 of the inverter 20 of the slave press device 200 to be synchronized. Synchronization method of the press device using a general motor, characterized in that to maintain the PWM ratio.

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