KR20210028508A - Device for tailoring the cutting length of rebar - Google Patents

Abstract

The present invention relates to a device for adjusting cutting length of a rebar. More specifically, the device controls a step motor and an encoder through a PLC when cutting length of a rebar is inputted through an input panel unit to automatically and finely adjust the cutting length of the rebar.

Description

Device for tailoring the cutting length of rebar}

The present invention relates to an apparatus for tailoring the cutting length of reinforcing bars, and more particularly, when inputting the cutting length of a reinforcing bar through an input panel, a step motor and an encoder are controlled by a PLC to automatically finely adjust the cutting length of the reinforcing bar. It relates to a device for tailoring the cutting length of.

In general, rebar used for construction is marked by measuring the length to be cut on each reinforcing bar after purchasing rebar, or measuring one sample with a ruler and cutting it, and then using the cut sample to measure the length of the other reinforcing bars and lengths. It was a method of making the same and then cutting with a cutter.

However, the above method is complicated and difficult because a person has to measure and cut the length of the reinforcing bar one by one, and since there must be a person who measures the length and a person who cuts it, unnecessary manpower is wasted. There was a problem that it took a long time to work because it had to be moved.

In addition, there is a problem in that it takes a long time to work and is uneconomical because a person carries a cut rebar one by one, and if careless, a safety accident occurs while transporting the rebar, resulting in injuries to a person.

Meanwhile, in order to solve the above problems, a conveyor for cutting rebar using a conveyor made of a belt has recently been devised, but since the conventional conveyor is a method of operating a conveyor made of fabric, the rebar is caught on the conveyor when rebar is supplied. There was a disadvantage of damaging the conveyor.

In addition, there is a problem in that it is not possible to accurately measure the length due to the speed at which the motor stops when the reinforcing bar is transferred while the reinforcing bar is placed on the conveyor.

Moreover, when measuring the length of reinforcing bars, measure and mark the length to be cut on each reinforcing bar with a tape measure, or measure and cut one sample with a ruler, and then use the cut sample to make the length equal to the other reinforcing bars, and then cut the cutter. There is a problem in that the work is complicated and unnecessary manpower is wasted, thereby reducing productivity.

Registration Patent No. 10-1015541 (rebar bending device) Korean Patent Publication No. 10-1999-0073464 (rebar cutting machine) Registered Utility Model No. 20-0164873 (Rebar transfer device of conveyor for cutting rebar) Registered Patent No. 10-1400055 (Device for tailoring the cutting length of reinforcing bars)

The present invention is intended to solve the above-described problem, and the search for a derivative industry that can increase added value by investing a small amount of capital as well as increasing production was considered as an alternative to break through the structure of reality. An object of the present invention is to provide a device for tailoring the cutting length of reinforcing bars that can generate added value.

Accordingly, an object of the present invention is to provide a device for tailoring the cutting length of a reinforcing bar that can improve the rebar numerical adjustment time and cutting length error, which are disadvantages, while maintaining the low cost and bidirectional productivity, which are the advantages of a manually operated rebar cutter.

In the apparatus for tailoring the cutting length of the reinforcing bar according to the present invention for achieving the above object, in the apparatus for tailoring the cutting length of the reinforcing bar, an input panel unit for inputting the length of the reinforcing bar to be cut; A control panel for controlling the position of the guide part according to the length information of the reinforcing bar input from the input panel part; Transfer unit including a roller so that the reinforcing bar to be cut is guided; A slide rail coupled to extend parallel to the side of the frame on one side of the transfer unit; And a guide unit that slides along the slide rail so as to match the length information of the reinforcing bar received from the control panel and stops according to the cut length of the reinforcing bar.

The guide portion is installed parallel to the upper portion of the roller, the stopper for blocking the end of the reinforcing bar while moving the transfer portion left and right; And a moving device coupled to the stopper and moving the stopper left and right.

The moving device includes a rack gear extending parallel to and installed above the slide rail; A step motor that is supported by the slide rail and rotates forward and reverse according to the length value of the reinforcing bar input from the input panel unit: a pinion gear connected to the shaft of the step motor to transmit power of the step motor; and do.

It further includes a length display window coupled to the stopper to inform the position of the stopper.

The control panel and the step motor are connected with a control cable for supplying the control power and transmitting and receiving control information.

The control cable includes a cable tray of a flexible structure capable of protecting the control cable according to the left and right movement.

The control panel operates a step motor under the control of a programmable logic controller (PLC) system, and the stopper adjusts the length of the reinforcing bar to be cut by the number of revolutions of the step motor.

The length of the reinforcing bar to be cut displayed on the length display window and the length value measured by the laser Doppler speedometer may be corrected by measuring with a non-contact laser Doppler speedometer to verify the cutting length value of the reinforcing bar according to the driving of the step motor.

The step motor further includes a motor reducer.

In the apparatus for aligning the cutting length of the reinforcing bar, the life of the cutter, which is a cutter, can be predicted based on the number of rotations and the number of cuts of the cutter.

The control panel receives the length of the cut reinforcing bar from the input panel unit, moves the stopper to the position of 0, and then moves the stopper to the value of the input length.

Rebar cutting machine with cutting length adjustment function can communicate with PC through RS_232 cable and RF cable.

According to an embodiment of the present invention, a step motor and an encoder for fine adjustment are applied through the development of a control program for a PLC system, and a brake is mounted on the step motor, thereby eliminating the risk of safety accidents and maintaining a comfortable working environment. have.

In addition, in the present invention, the cutting process is automated to prevent injury to the operator due to manual work, and since the alignment and cutting operations are continuously performed, the productivity of the product according to the production of a large amount of small types can be remarkably improved.

In addition, the present invention can maintain uniform quality while increasing the speed of processing the ends of reinforcing bars through efficient work due to precise cutting length alignment without using a pair of moving rollers.

In addition, the present invention has the advantage that it can be provided inexpensively by attaching it to a manual device used by conventional small businesses.

1 is a view for explaining the conventional inventors of the domestic manual rebar cutting machine three models.
2 is a block diagram conceptualizing and showing the main configuration of a device for tailoring the cutting length of reinforcing bars according to an embodiment of the present invention.
3 is a view showing the overall configuration of a device for tailoring the cutting length of reinforcement according to an embodiment of the present invention.
4 is a view showing a plan view of a cutting length interlocking device according to an embodiment of the present invention for tailoring the cutting length of reinforcing bars.
5 is a front perspective view of an apparatus for tailoring the cutting length of reinforcing bars according to an embodiment of the present invention.
6 is a rear perspective view as viewed from the rear of FIG. 5.
7 is a perspective view showing a state in which a step motor, a rack gear, and a pinion gear are connected in an apparatus for tailoring a cutting length of a reinforcing bar according to an embodiment of the present invention.
Fig. 8 is a diagram for explaining the configuration of a laser doppler speedometer.
9 is a view showing the use of a laser Doppler speedometer to compare a step motor movement value and a length value measured through a laser Doppler speedometer in a rebar cutting machine having a cutting length adjustment function according to an embodiment of the present invention.
9 is a diagram showing a clock shape of a servo motor according to an embodiment of the present invention divided into A phase, B phase, and Z phase.
10 is a diagram showing a shape of a clock of a servo motor according to an embodiment of the present invention.

Hereinafter, a configuration and operation according to an embodiment of the present invention will be described with reference to the accompanying drawings. Here, in adding reference numerals to elements of each drawing, it should be noted that, even though they are shown on different drawings, only the same elements are denoted by the same numerals as much as possible.

2 is a block diagram conceptualizing and showing the main configuration of a device for tailoring the cutting length of reinforcing bars according to an embodiment of the present invention.

Referring to FIG. 2, the present invention provides an input panel unit 110 for inputting the length of the reinforcing bar to be cut, and a control panel for controlling the position of the guide unit 155 according to the length information of the reinforcing bar input from the input panel unit ( 190), a transfer unit 220 including a roller to guide the reinforcing bar to be cut, a slide rail 153 coupled to extend parallel to the side of one frame of the transfer unit 220, and received from the control panel 190 It includes a guide part 155 that slides along the slide rail to match the length information of the reinforcing bar and stops according to the cut length of the reinforcing bar.

The input panel unit 110 includes a display window and a button for a user's manipulation.

The device 100 for tailoring the cutting length of the reinforcing bar according to an embodiment of the present invention is a guide that slides along the slide rail 153 to match the length information of the reinforcing bar received through the button and stops according to the cutting length of the reinforcing bar. It includes a transfer unit 220 including a unit 155 and a roller 221, and the cutting length of the reinforcing bar is inputted by the display window and a button for operation by the user.

As a result of this work, it was found that it was difficult to fine-tune the length, and accordingly, a step motor 160 or a servo motor 160', a speed reducer 165, an encoder, and the like were employed as components for length adjustment.

The control panel 190 receives the length of the cut reinforcing bar from the input panel unit, moves the stopper to the position of 0, and then moves the stopper to the value of the input length.

In addition, in the apparatus for tailoring the cutting length of the reinforcing bar, the life of the tool, which is a cutter, can be predicted from the number of rotations and the number of cuttings of the cutter through the control panel 190 or the like.

At this time, the PLC system 191 needs to monitor whether the servo motor 160 ′, the reducer 165, and the encoder are precisely driven as scheduled. The personal computer storing the monitoring software is mainly used as the PLC system 191. ) And use the stored monitoring software.

In general, the PLC system 191 uses a communication port on a PC to connect with a PC, and mainly includes a driver 195 using a USB communication port and an RS232 communication port of the PC.

In the present invention, in order to effectively utilize the PLC system 191, a system for controlling the cutting value of reinforcing bars with a simple operation using the input panel unit 110 has been developed.

Through this, it was possible to provide a function of improving the cutting value quality of the reinforced processed product (within an error of 10 mm or less) and reducing the time for fixing the cutting value to increase productivity by more than 10%. In order to implement these functions, the present invention uses a step motor 160 or a servo motor 160', a reducer 165, an encoder, and the like.

3 is a view showing the overall configuration of a device for tailoring the cutting length of reinforcement according to an embodiment of the present invention.

3 is a view showing the configuration of a system applied to the device for tailoring the cutting length of reinforcement according to an embodiment of the present invention.

In addition, in the case of the device for matching the cutting length of reinforcing bars according to an embodiment of the present invention, it is possible to determine the rotational state of the step motor 160 from a counter mounted on the rotor, which is a rotor, and accordingly reinforcing bars (S You can check the movement status of ).

In addition, the rebar discharge stand 250 is installed on the side of the position where the slide rail 153 is attached to the side of the transfer unit 220 so that when a certain number of reinforcing bars is cut, it is discharged to the outside to be shipped.

4 is a view showing a plan view of a cutting length interlocking device according to an embodiment of the present invention for tailoring the cutting length of reinforcing bars.

Referring to FIG. 4, the PLC system 191 may control the cutter 150 for cutting the reinforcing bar S, and may control the step motor 160 through the controller 193 and the driver 195.

At this time, the reinforcing bar (S) from the reinforcing bar supply unit is cut according to the operating state of the cutter 150 and is stacked on the transfer unit 220 including the rollers 221 of the reinforcing bar cutting unit 270.

Of course, a transfer unit 220 including a roller 221 is disposed in the rebar supply unit connected to the cutter 150 and is designed to control the movement using a conventional rebar moving method.

It goes without saying that the apparatus 100 for tailoring the cutting length of the reinforcing bar of the present invention equipped with such a length adjustment function can also be controlled through a portable terminal.

5 is a front perspective view of an apparatus for tailoring the cutting length of reinforcing bars according to an embodiment of the present invention. 6 is a rear perspective view as viewed from the rear of FIG. 5.

5 and 6, the guide part 155 is installed side by side on the upper part of the roller 221 to move the transfer part 220 left and right, and a stopper 210 that blocks the end of the reinforcing bar (S). Is included.

Therefore, when the user inputs the cutting length of the reinforcing bar (S) through the button 115 of the input panel unit 110, the position of the stopper 210 is moved accordingly to adjust the cutting length of the reinforcing bar (S) to be cut. Do.

The control panel 190 for controlling the cutting process of the overall reinforcing bar S and the step motor 160 are connected by a control cable 175 for supplying control power and transmitting and receiving control information.

Of course, at this time, the control cable 175 includes a cable tray 176 of a flexible structure that can protect the control cable 175 according to the left and right movement, so there is no obstacle to electric signal transmission through the control cable 175. It is configured not to be.

7 is a perspective view showing a state in which a step motor, a rack gear, and a pinion gear are connected in an apparatus for tailoring the cutting length of a reinforcing bar according to an embodiment of the present invention.

Referring to FIG. 7, the guide part 155 with the stopper 210 installed on the upper side thereof is supported by the slide rail 153 and coupled, and determined according to the length value of the reinforcing bar S input from the input panel part 110. , It is connected to the step motor 160 rotating in reverse.

As an embodiment, the guide portion 155 on which the stopper 210 is installed is closedly coupled to the moving rail 154 to move left and right so that it can stably move along the rack gear 162.

Here, it includes a pinion gear 164 connected to the motor shaft of the step motor 160 to transmit power. The pinion gear 164 is gear-coupled with a rack gear 162 installed to extend and support the slide rail 153 in the longitudinal direction.

As shown in the enlarged view of FIG. 7, the fast rotation of the pinion gear 164 is transmitted to the rack gear 162, and the rack gear 162 is connected to the transfer unit 220. Therefore, the fast rotation of the pinion gear 164 is configured so that the stopper 210 can move through the rack gear 164 having a large number of teeth.

Fig. 8 is a diagram for explaining the configuration of a laser doppler speedometer.

Referring to FIG. 8, in the present invention, a laser Doppler speedometer is used as an auxiliary means for measuring the cutting length of a reinforcing bar by measuring the number of revolutions by the servo motor 160.

A laser doppler velocimeter 300 is a velocity meter using the Doppler effect.

를 일으킨다.The Doppler effect refers to a phenomenon in which the frequency of light scattered from a moving object is shifted from the frequency of incident light according to the moving speed of the object. When the light of frequency (f) is incident at an angle ㅨ with respect to the moving direction of the moving object, the frequency changes as shown in Equation 1 by the Doppler effect.

Causes.

[Equation 1]

는 매질 중의 빛의 파장, v는 운동하는 물체 즉 철근(S)의 속도이다. 따라서 주파수 변화

를 측정하면, 철근(S)의 이동속도를 측정할 수 있다. here,

Is the wavelength of light in the medium, and v is the speed of the moving object, that is, the reinforcing bar (S). Hence the frequency change

By measuring, it is possible to measure the moving speed of the reinforcing bar (S).

This measurement method has features such as non-contact measurement that does not cause confusion in the object to be measured, has high spatial resolution, has good linearity from low speed to high speed, and allows a wide range of measurements.

In FIG. 8, a He-Ne laser is emitted, and the He-Ne laser becomes irradiated light having a frequency of _{f 0 by a beam splitter.}

Such irradiation light becomes scattered light by the passing reinforcing bar (S), and the light reflected from the tip of the optical probe and the light reflected from the reinforcing bar are returned to the beam splitter through the single-mode optical fiber.

The light returned in this way is incident on a receiver having an APD (Avalanche photo diode).

In this way, light incident through the avalanche photodiode, which is an optical communication light receiving device that converts light into electrical energy, is incident on the frequency analyzer through the optical receiver.

8 is a view showing the use of a laser Doppler speedometer to compare a step motor movement value and a length value measured through a laser Doppler speedometer in the apparatus for tailoring the cutting length of a reinforcing bar according to an embodiment of the present invention.

Referring to FIG. 8, it is possible to check the length of the reinforcing bar S disposed on the transfer unit 220 including the roller 221 in a non-contact manner. At this time, a method of measuring the moving speed and multiplying it by time to obtain the length is used.

As shown in FIG. 7, the step motor 160 rotates by the operation of the PLC system 191 of FIG. 3, and the rebar S is moved by a sensor mounted on a rotor (not shown) or a stopper 210, etc. Measure the distance. That is, the number of rotations of the rotor can be known through the length display window 112 as shown in FIG. 6, and a method of converting the moving distance of the reinforcing bar S through the number of rotations of the rack gear may also be used.

Of course, this measurement method is as described above in that the moving distance is determined by correcting the moving distance of the reinforcing bar S through the laser Doppler speedometer 300 due to various external factors.

In addition, the speed reducer of the step motor 160 according to an embodiment of the present invention may use a vertical gear coupling method.

The step motor speed reducer 165 is coupled to the side of the step motor 160 as a brake system. The step motor speed reducer 165 is in the form of a reduction gear, and the effect of a reduction ratio of 200/1 or more can be obtained by lowering the gear ratio.

9 is a view showing a clock shape of a servo motor according to an embodiment of the present invention divided into A phase, B phase, and Z phase.

10 is a diagram showing a shape of a clock of a servo motor according to an embodiment of the present invention.

As shown in FIG. 9, an encoder (pulse generator) is built into the servomotor 160' according to the present invention, and the rotation speed, rotation amount, and rotation direction can be detected.

The encoder according to the present invention is mainly used as an incremental encoder and an absolute encoder.

For example, it is preferable to use the incremental encoder method if you need to rotate several times at first, and use the absolute encoder method if you need to rotate at a certain angle such as half a wheel after stopping.

That is, an incremental encoder may be provided on the motor shaft, and an absolute encoder may be provided on the reduction gear output shaft.

Incremental encoder

It is an encoder capable of detecting the rotation amount, rotation speed, and rotation direction of the servomotor 160'. Since the detection waveform is output as it is, the current position disappears when a power failure occurs.

Light from an LED (light emitting diode) mounted inside the encoder is detected by a photo transistor through a slit. At this time, the repetition of light reception/shielding is converted into an electric signal as it is.

In the case of a 2000 pulse encoder, 2000 slits (holes) are made on the circumference of the slit disk as shown in Fig. 9(a).

And, as shown in Equation 2, the detection of the rotational speed is performed by using the output of 100,000 pulses (100 [kHz]) every second when the 2000 pulse/rotation encoder rotates at 3000 [r/min].

[Equation 2]

As shown in FIG. 9(b), the rotation direction may be detected according to the states of the electrostatic pulse and the reverse pulse.

In addition, as shown in Fig. 9(c), in the present invention, the number of pulses is counted at intervals of 500 [μs] so that the control of the servo motor 160' is not affected by the servo amplifier.

This is because, if 50 counts at 500 [μs], it becomes as shown in Equation 3, and 3000 [r/min] can be detected, and in reality, the detection accuracy can be increased by using the clock of the CPU inside the servo amplifier.

[Equation 3]

Since the synchronous servomotor 160' detects the position of the rotor, it outputs the A, B, and X phase signals as well as the 1, 2, and 3 phase signals. One rotation of the rotor (360 degrees) is detected by three phase signals. Actually, the A and B phase signals are used together to increase the detection accuracy.

Absolute encoder

An encoder capable of detecting the absolute position of the servomotor 160' within one rotation. When the power is turned on, multi-turn information and the like are transmitted to the servo amplifier, and then the current position data is output.

Light-emitting diode (LED) light is read into a light-receiving element through a position detection pattern on a transparent slit disk.

Dozens of phototransistors are integrated in the light-receiving element. The encoder is equipped with a CPU to analyze the pattern for absolute position detection. That is, the current location data is transmitted to the PLC system 191 through the USB communication port and the RS232 communication port.

The rotation direction, rotation amount, rotation speed, and pole position of the servo motor 160' are calculated through the PLC system 191 from the current position data transmitted through RS232 communication or the like.

The light emitted through each light emitting element periodically illuminates the A, B, and Z phases. When the encoder rotates, the light emitted from the rotating slit shines on each phase and then obscures the speed of rotation of the axis. It's a way to measure.

On the other hand, the absolute method sets the absolute value of each point and transmits the value at the corresponding position measured while the encoder rotates around the axis. Unlike the incremental method, the device does not rotate more than one turn, that is, a specific angle. It can be said to be a method suitable for use in devices that need to move finely.

While the rotation axis is moving, the position value as much as it has moved from a specific position is transmitted.The value for the angle is indicated through the hole of the rotating slit, and the position where the encoder rotates considering the position and weight of the light passing through the slit. You pass the value.

On the other hand, the resolution of the encoder is the most important factor in the performance and can be used differently depending on the characteristics and specifications of the device being used. The higher the resolution, the finer the rotational speed and position of the shaft can be measured. When the encoder rotates once, the generated signal is output as much as the number of resolutions.

In conclusion, in the case of an incremental encoder, a total of 360 pulses are generated when the device connected to the encoder with a resolution of 360 rotates exactly one turn. That is, when one rotation is accurately rotated, it is 360 degrees, so one pulse is generated for every 360/360 = 1 degree movement. By setting a timer on the device connected to the MCU, the rotational angular velocity of the encoder can be measured based on the number of times input to the MCU for a specific time.

On the other hand, in the case of an absolute encoder, the goal is to find out the rotational position of the rotating body. If the resolution is 360, the current rotational degree of the rotating body is measured in units of 1 degree, which is the actual power unit. If the rotating body located at about 90 degrees moves 30 degrees in the clockwise direction, the output value of the encoder is output from 90 degrees to 120 degrees.

Output method

In the case of incremental encoders, the goal is to measure the number of revolutions in an incremental way, so the MCU side measures the rotation rate through a rising-edge input interrupt.

In Fig. 9(d), the control panel 190 is clockwise (CW) when the phase B waveform is delayed by 90 degrees from the A phase as shown on the left, and counterclockwise (CCW) when the phase B waveform is 90 degrees faster as shown on the right. Is controlled by

It shows a method of analyzing the rotation direction of the encoder through the phases of the A and B phases.

When the axis of the encoder rotates in the clockwise direction (CW), the phase A is 90 degrees ahead of the phase B, and when the axis of the encoder rotates in the counterclockwise direction (CCW), the phase B is 90 degrees ahead of the phase A. The method to find out the direction in which the axis of the encoder rotates is as follows by using the phase difference between the A and B phases.

PLC control program

Connect the A phase of the encoder to GPIO (general-purpose input/output) input mode and set the B phase to the Rising Edge type Interrupt.

When an interrupt occurs by the phase B by calling the Interrupt_InputB function, phase A is stored in the state, and when the state is 1, the direction input value (rotate_direction) is stored as 1 and rotated clockwise (CW), and If the phase A state is 0 when an interrupt occurs, the direction input value (rotate_direction) is stored as 0 and rotated counterclockwise (CCW).

Here, the Interrupt_InputB function is a function that senses the occurrence of an interrupt by the B phase in the GPIO mode.

Hardware method

As shown in FIG. 10 (a), the present invention can know the direction of rotation by using a D flip-flop circuit simply modified hardware of the control panel 190.

The direction can be checked through the output Q value by connecting the A phase to the input D and the B phase to the clock.

Due to the characteristics of the D flip-flop, the output value Q is fixed until the rising edge of the clock is input, and the phase of the A phase is output when the rising edge is input.

It can be seen that the rotation direction is output as shown above by using the characteristic that the phase A and B phase change according to the rotation direction of the servo motor shaft.

On the other hand, when using an absolute type encoder, the position value of the encoder is output as it is, so you can accept each value with the GPIO Input mode of the MCU and process the value.

Figure 10 (b) shows the waveform of the absolute encoder.

The resolution of the encoder is 6, and the position where the encoder is rotated can be seen through the part marked in red. Through the absolute encoder with a resolution of 6, it can be seen that the rotating body of the device has moved to the positions of 60 degrees, 120 degrees, 180 degrees, 240 degrees, 300 degrees, and 360 degrees.

As an embodiment of the present invention, after selecting the incremental type and the absolute type according to the physical usage of the encoder, it is less affected by the distortion and noise of the waveform and the distance between the encoder and the circuit is reduced according to the characteristics of the circuit where the encoder is installed. Totem pole method, which is good to use when the power supply voltage of the encoder and the power supply voltage of the circuit are different, NPN open collector method that is good to use, PNP open collector method, a line that can operate with fast response speed when the position of the circuit is far from the encoder. One of the driver methods can be used.

Preferably, when it is necessary to measure the number of rotations in order to quickly move the reinforcing bar according to the purpose of using the encoder according to the present invention, it is an incremental type. If you want to measure the moving angle, use an absolute encoder.

110: input panel unit
112: length display window
115: button
154: moving rail
155: guide part
153: slide rail
160: step motor
160': Servo motor
162: rack gear
164: pinion gear
165: reducer
210: stopper
220: transfer unit
221: roller

Claims (12)

In the device for tailoring the cutting length of reinforcing bars,
An input panel unit for inputting the length of the reinforcing bar to be cut;
A control panel for controlling the position of the guide part according to the length information of the reinforcing bar input from the input panel part;
A transfer unit including a roller to guide the reinforcing bar;
A slide rail coupled to extend parallel to the side of the frame on one side of the transfer unit;
A device for tailoring the cutting length of the reinforcing bar, including; a guide unit that slides along the slide rail to match the length information of the reinforcing bar received from the control panel and stops according to the cut length of the reinforcing bar. The method of claim 1,
The guide part
A stopper installed parallel to the upper portion of the roller to block the end of the reinforcing bar while moving the transfer part left and right;
A moving device coupled to the stopper and moving the stopper left and right; The method of claim 2,
The moving device includes a rack gear extending parallel to and installed above the slide rail;
A step motor that is supported and coupled to the slide rail and rotates forward and backward according to the length value of the reinforcing bar input from the input panel unit:
A pinion gear connected to the axis of the step motor to transmit the power of the step motor; The method of claim 2,
The device for tailoring the cutting length of the reinforcing bar further comprising a; length display window coupled to the stopper to inform the position of the stopper The method of claim 4,
A device for tailoring cutting length of reinforcing bars, characterized in that the control panel and the step motor are connected with a control cable that supplies the control power and transmits and receives control information. The method of claim 5,
The control cable is a device for tailoring the cutting length of a reinforcing bar, characterized in that it comprises a cable tray of a flexible structure that can protect the control cable according to the left and right movement The method of claim 6,
The control panel operates a step motor under the control of a PLC system, and the stopper adjusts the length of the reinforcing bar to be cut according to the number of revolutions of the step motor. The method of claim 7,
It is characterized in that it is possible to correct the length of the rebar to be cut displayed on the length display window and the length value measured by the laser Doppler speedometer by measuring with a non-contact laser Doppler speedometer to verify the cutting length value of the reinforcing bar according to the step motor driving Device for tailoring the cutting length of reinforcing bars The method of claim 3,
The device for tailoring the cutting length of the reinforcing bar, characterized in that the step motor further includes a motor reducer. The method of claim 1,
The device for tailoring the cutting length of the reinforcing bar,
A device for tailoring the cutting length of a reinforcing bar, characterized in that the life of the cutter tool is predictable from the number of cutting revolutions and the number of cuts of the cutter. The method of claim 1,
The control panel receives the length of the cut reinforcing bar from the input panel unit, moves the stopper to a position of 0, and then moves the stopper to a value of the input length. The method of claim 1,
The cutter having a function of adjusting the cutting length of the device for adjusting the cutting length of the reinforcing bar is a device for tailoring the cutting length of the reinforcing bar, characterized in that communication with a PC is possible through an RS_232 cable and an RF cable.

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