KR20180017495A - Footswitch control methods crimping improve work safety and work efficiency of machine error detection - Google Patents

Abstract

The present invention relates to a footswitch control method for improving work safety and operation error discrimination efficiency of a crimping machine. More specifically, a monitoring unit serves as an intermediate bridge between a footswitch and the crimping machine to prevent the footswitch from operating in a situation where an error occurs or a program is set by a user in the monitoring unit. The present invention comprises: a monitoring step of converting, aligning, and comparing a crimping signal of the crimping machine in the monitoring unit; an informing step of informing a user that an operation error and a failure are determined by the monitoring unit; a machine stopping step of stopping the crimping machine when the operation error and the failure are determined by the monitoring unit; and a machine operation step of operating the crimping machine by the footswitch after removal of the operation error and the failure in the crimping machine.

Description

Technical Field [0001] The present invention relates to a footswitch control method for improving the safety of a crimping machine,

[0001] The present invention relates to a foot switch control method for improving work safety and work error discrimination efficiency of a crimping machine. More particularly, the present invention relates to a foot switch control method in which a monitoring part serves as an intermediate bridge between a foot switch and a crimping machine, Or to prevent the foot switch from operating in the same situation during program setting by the user.

In general, display monitors, LED TVs, LCD TVs, or automotive interior electronics often see the various types of cables connected to these devices being intertwined or twisted together.

Particularly, each peripheral device is installed separately or connected arbitrarily according to the shape of the product by using a cable which is separately and independently constructed.

In recent years, the shape of the product has been increasingly focused on the external design part,

In addition, there are elements to be designed in consideration of the product design when designing the appearance, so that each of the devices installed in the internal parts can make efficient use of the product space according to the external shape of the product, .

In order to obtain such a product shape, it is necessary to downsize the parts. However, if the existing wiring connecting cables are installed in a bundle shape, many eros situations may occur during installation and assembly of the product. Recently, it has been replaced by a flat cable instead of a bundle type.

However, in the case of a flat cable used to satisfy the aforementioned installation structure or environmental limitation requirement, in order to produce a cable in the form of a flat with one or more wires connected thereto,

According to the product usage standard, cut by the cutting machine according to the order requirement.

And, at both ends of the cut cable, all of the individual wires must be stripped so that the connector pins can be connected to both ends of the cut cable at a certain length to connect the connectors.

Crimping work is the work of mechanically and electrically connecting the metal crimp terminal with the strand end of the wire whose end is covered with the coating by the above-mentioned operation.

In addition, the crimping is a kind of bending. Crimping is a method of making a connecting part, in particular a wire with a connector (with a plug shape) (e.g. a crimp connector) by permanent deformation.

This permanent connection is very suitable as an alternative to other connection methods such as welding or soldering because of its good electromechanical stability.

Therefore, a lot of crimping is applied to electric devices such as mobile communication and automobile electric parts.

A crimp is a shape that exactly fits a wire to make a permanent deformation of the wire.

.

 Such crimping is accomplished by a crimping machine such as a crimping gripper or a crimping press.

A conventional foot switch is a switch connected to a crimping machine and operating a crimping operation once every time the switch is stepped on,

Conventionally, the crimping machine is directly connected to the crimping machine.

The problem with these footswitches is due to the simple connection to the crimping machine,

First, since the monitoring unit does not receive a proper signal, it is not possible to analyze whether there is an error or whether it is a defective product, so that a continuous crimp operation may not be performed.

Secondly, for safety reasons, the Crimp Machine can work when the user is manipulating the monitoring part.

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems, and it is an object of the present invention to prevent the foot switch from operating in the same situation during an error occurrence situation or a program setting by a user by allowing the monitoring unit to function as an intermediate bridge between a foot switch and a crimping machine And to provide a foot switch control method that improves work safety and work error discrimination efficiency of a crimping machine.

A footswitch control method for improving work safety and operation error discrimination efficiency of a crimping machine according to the present invention, the footswitch control method comprising: a monitoring step of converting, aligning and comparing a crimping signal of a crimping machine in a monitoring section; An informing step of informing a user of an operation error and a failure discrimination by the monitoring unit; A machine stopping step of stopping the crimping machine when it is determined by the monitoring unit that an operation error and a fault are detected; And a machine operation step in which the cream pin machine is actuated by the foot switch after the operation error of the crimping machine and the defective operation are removed.

In the present invention, the monitoring step may include: a crimping operation for pressing a hemmer of a crimping machine, a pressure sensor for detecting a pressure of the hemmer, a signal for converting the transmitted signal into a digital signal using a high- Processing step; An aligning step of aligning a reference signal and a crimping signal of the converted working moment; And a comparison step of comparing and analyzing the two aligned signals to determine whether there is an operation error.

In the present invention, the monitoring unit firstly operates a user to set a reference signal and a tolerance, compares the measured signal with a user-input reference signal in real time so as to perform a crimping operation, It is preferable to treat it.

In the present invention, it is preferable that the foot switch is configured to detect a crimping operation error by the monitoring unit, and the monitoring unit serves as an intermediate bridge between the foot switch and the crimping machine.

In the present invention, it is preferable that the foot switch is connected to the monitoring unit and the crimping machine so that the foot switch does not operate in the same situation during error occurrence or program setting by the user.

A footswitch control method for improving work safety and work error discrimination efficiency of a crimping machine according to the present invention is characterized in that a sensor installed in a crimping machine for performing a crimping operation facilitates accurate signals from a sensor There is an excellent effect that can be extracted.

In addition, when a signal is detected with a reference signal when normal operation is performed without error, the measured signal is compared with a measured crimp signal every time a crimping operation is performed, Can be easily monitored.

In addition, if there is an error between the reference signal and the measured signal by more than the tolerance set by the user, an alarm is sounded through the buzzer and the operation of the machine can be easily stopped.

In addition, there is an excellent effect that the user can easily eliminate the cause of the error of the operation, correct the cause of the defect, and then perform the crimping operation again.

1 is a schematic diagram schematically showing a crimping machine;
2 is a block diagram schematically illustrating a monitoring unit;
3 is a flowchart schematically showing a foot switch control method according to the present invention.
4 is a signal value graph showing a state in which a signal value extracted by the signal processing step of the present invention is digitized.
5 is a flowchart schematically showing a signal processing method according to the present invention.
6 is a flowchart schematically illustrating a step of converting a signal value according to the present invention.
7 is a circuit diagram of Fig.
Figure 8 is a flow chart schematically illustrating an alignment method according to the present invention;
9 is a graph schematically showing a state of being aligned by the falling edge alignment according to the present invention
10 is a graph schematically showing a state in which a large number of signals are arranged for setting a threshold line according to the present invention
11 is a graph schematically showing a state in which threshold line setting is performed according to the present invention
12 is a distribution diagram schematically comparing the falling edge alignment of the present invention with the conventional 50% point alignment.
13 is a graph schematically showing a state in which a section is divided by a threshold line setting according to the present invention.
14 is a photograph schematically showing a foot switch connection terminal according to the present invention.
15 is a circuit diagram schematically showing a foot switch according to the present invention.
16 is a circuit diagram schematically showing a state of an operation state of a foot switch according to the present invention;

Hereinafter, a foot switch control method (hereinafter, referred to as a foot switch control method) for improving the work safety and the work error discrimination efficiency of the crimping machine according to the present invention will be described in detail with reference to the drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

The CFM (Crimp Force Monitor) is a monitoring system that identifies work errors in the crimping operation (mechanical and electrical connection of the metal crimp terminal through the strand end of the stripped wire) Quot;

1, the crimping machine 10 is provided with a hammer 14 and an anvil 16 for crimping the crimping wire 12 and crimping the crimping wire 12 by means of a hammer 16, And a sensor 20 for measuring the pressure to be measured.

The sensor 20 may be a frame strain sensor or a force sensor.

2, a monitoring unit 100 according to the present invention, a sensor 20 provided in a crimping machine 10 connected to the monitoring unit 100, a monitoring unit 100, A buzzer 40, an LCD display 60, a foot switch 80 and a keyboard 90 for operation are interconnected through an electric circuit.

The buzzer 40 is used to sound a buzzer in the event of an error. The LCD display 60 displays an operation such as setting a tolerance or a reference signal of the monitoring unit 100 through a screen .

The foot switch 80 is a device that acts as a trigger when a user performs a crimping operation, and can perform one crimping operation each time the user presses the foot with the foot.

The above-described crimping machine 10 and the monitoring unit 100 may be configured to monitor and change the crimping signal of the crimping machine 10 in the monitoring unit 100 as shown in FIG. Step S1000,

A notification step S2000 of informing a user of a work error and a failure determination by the monitoring unit 100,

A machine stopping step S4000 of stopping the crimping machine 10 when the monitoring unit 100 discriminates an operation error and a fault,

And a machine operation step S6000 in which the cream pin machine 10 is actuated by the foot switch 80 after the operation error of the crimping machine 10 and the removal of defects.

The monitoring step S1000 may include a signal processing step S100, an alignment step S200, and a comparison step S400 as shown in FIG.

The signal processing step S100 is a crimping operation in which the hemmer 14 of the crimping machine 10 is pressed as shown in Fig.

Then, the pressure of the hemmer 14 is checked by the sensor 20 during the crimping, and the transmitted signal is converted into a digital signal as shown in FIG. 4 by using a high-pass filter.

As an example, the signal processing step S100 includes a crimping step S10 in which the hemmer 14 of the crimping machine 10 is pressed, as shown in Fig. 6, And a signal value conversion step S40 for converting the signal sent by the sensor 20 into a digital signal using a high-pass filter. desirable.

In the crimping step S10, as shown in FIG. 1, the hemmer 14 is instantaneously lowered to crimp the crimping wire 12 to press the crimping wire 12.

The pressure checking step S20 checks the pressure of the hemmer 14 by the sensor 20 during the crimping step as shown in FIG.

The signal value conversion step S40 converts the signal transmitted by the sensor 20 into a digital signal using a high-pass filter.

The signal value conversion step S40 may include a buffering step S42, a high-pass filtering step S44, a low-pass filtering step S46, an amplifying step S48, , And a signal value processing step (S49).

In the buffering step S44, the signal measured by the sensor 20 is buffered by the voltage buffer.

That is, the voltage buffer prevents attenuation of the sensor signal.

In the high-pass filter step S44, a signal having a buffering step is filtered by a high pass filter (HPF).

At this time, it is preferable to set a cutoff (a reference frequency for removing a low frequency signal) to 1 Hz to remove a frequency lower than the cutoff frequency.

Therefore, it is possible to eliminate the drift in which the offset changes, as it gradually slides with time.

Then, by setting the cutoff at a frequency lower than the drift, the drift smaller than the cutoff frequency disappears and the offset shifts to a straight line where the input signal from the sensor can be measured and extracted more accurately during the crimping operation.

In addition, the sensor sends a signal of about 10 to 12V to the offset when there is no input.

Most preferably, the sensor sends a signal of 11V to the offset as soon as there is no input.

Therefore, since the sensor's default value of 11V is also smaller than the cutoff frequency, the sensor signal is close to 0V or ground, so that the sensor input signal can be measured and extracted more accurately during the crimping operation.

In the low-pass filter step S46, the signal filtered by the high-pass filter is again filtered by a low-pass filter (LPF), so that the signal of the sensor can be more accurately measured and extracted.

In the amplifying step S48, the low-pass filtered signal is amplified by a differential amplifier.

That is, the error and drift are removed by the high-pass filter, and the signal of the accurately extracted sensor is amplified to change into a digital signal.

The signal value processing step S49 converts the signal having the amplification step S48 into a digital signal by an analog-digital converter (ADC).

That is, the continuous analog signal of the sensor is sampled, quantized, and encoded through a converter to convert it into a binary digital signal.

Therefore, the signal extracted from the sensor is converted into a digital signal as shown in Fig.

The sensor signal that has undergone the signal processing step S100 as described above forms an alignment step S200 for aligning the reference signal and the converted crimping signal of the working instant.

In addition, it is preferable that the aligning step S200 aligns the reference signal and the crimping signal through falling edge alignment (50% point alignment + ADC alignment) as shown in FIG.

In the aligning step S200, a first aligning step S220 of aligning the measured crimp signal and the reference signal to the 50% point of the falling edge using the existing point alignment is performed first.

Then, a second alignment step S240 is performed to precisely align and calculate the aligned signal values by time shifting only ± 2.5% using absolute difference summation (ADS).

.

For this, the following equation is applied.

According to the above equation, ADS calculates the sum of the absolute values of the two signal value differences.

이 가장 작게 나왔을 때(두 신호의 차이가 가장 적은 상태, 즉 가장 정밀하게 정렬된 상태)의

값 만큼 측정된 크림프 신호를 타임 시프팅 시켜 정밀하게 얼라이먼트를 이룬다.The area to be calculated sets a specific range on the falling edge, time-shifting the measured Crimp signal value, calculating ADS,

(The state in which the difference between the two signals is the smallest, that is, the most precisely aligned)

The time-shifting of the measured crimp signal results in precise alignment.

That is, for the reason that the point alignment is performed at 50% by dividing into two stages without using alignment from the beginning by using only ADS,

1. First align the two signals by point alignment method.

2. ADS can be calculated with ADS only ± 2.5% after point alignment, without needing to calculate the whole signal interval, and the process time required for total alignment can be reduced.

Therefore, by comparing the error between the measured crimp signal and the reference signal that are aligned through the alignment as described above, it is possible to accurately determine the error of the operation.

In addition, basically, when a certain period is divided based on time, and the area of each section is compared, if it is larger than the set percentage error, it can be determined as an operation error and informed to the user.

The signal having the alignment step S200 as described above is subjected to the comparison step S400.

In the comparing step (S400), it is preferable that the signal sorted by the aligning step (S200) for discriminating an operation error is divided into a plurality of regions for comparison measurement and compared.

In the comparison step S400, a first comparison step S420 is performed to select a section showing a large difference from the reference signal according to the state of the crimp signal.

A second comparison step S440 of dividing one period selected by the first comparison step S420 into smaller smaller intervals based on the curved shape of the signal.

In the first comparison step S420, a section showing a large difference from the reference signal is selected according to the state of the crimp signal in order to set a threshold line.

For example, as shown in FIG. 9, a threshold line for dividing each section is estimated by comparing aligned signals through a large number of alignments.

That is, an interval showing a large difference from the reference value is selected and the width of the interval is selected as a parameter value representing the signal.

In the second comparison step S440, the larger one interval is divided into smaller smaller intervals based on the curve shape of the signal.

For example, as shown in FIG. 10, in order to set one large period to be a reference, the first threshold line in time is set to a point at which the signal is branched from a period in which the rise of the first signal starts do.

The threshold line is set at the point where signals are converged in a section where the falling of the aligned signal starts.

That is, one large section is defined as an area within these two threshold lines.

And, the large section can be divided into two or more small sections in the same way.

Therefore, it is possible to monitor and control an operation error or defect occurring in the crimping operation of the crimping machine by the comparison step.

For example, as shown in FIG. 11, when the signal processing is performed after 50% point alignment and signal processing after aligning with the error discrimination and the falling edge alignment (50% point alignment + ADC) Can be observed.

As shown in FIG. 12, in order to indicate an error situation, a comparison was made between a case where one half of a wire strangely damaged and a half wire of a normal state were subjected to point alignment and a case of falling edge alignment will be.

As shown in FIG. 13, the horizontal axis T1 and the vertical axis T2 are divided into three regions by setting a threshold line for signal processing. Respectively,

% Is a percentage of the difference between the reference signal and each section.

That is, as shown in Figs. 10 and 11, 13 samples out of 13 samples in the falling edge alignment of the normal wires came in the reference range, and 11 samples out of 13 samples in which only 50% point alignment was in the reference range .

In addition, among the specially damaged wires, 13 of 13 samples out of the standard range are out of the reference range, but 12 out of 13 samples out of the reference range are only 50% point aligned.

Therefore, it can be seen that the sample with falling edge alignment is more accurate than the sample with 50% point alignment only.

In addition, the monitoring unit of the present invention judges whether or not a work error or defect is caused by a deviation from a tolerance range set by the user.

For this purpose, the monitoring unit first sets the reference signal and the tolerance by the user, and compares the measured signal with the reference signal inputted by the user so that the crimping operation can be performed.

Then, the user can set the LCD display or keyboard directly by the user.

 That is, the user can directly input the reference signal by crimping and set the tolerance range between the reference signal and the measured signal.

Therefore, the monitoring unit can compare the reference signal with the measured crimp signal, and determine whether the measured signal is out of the tolerance range set by the user, thereby determining the operation error or failure.

As described above, the crimping machine 10 monitored by the monitoring unit 100 forms a notification step S2000 of notifying the user of an operation error and a failure determination by the monitoring unit 100. FIG.

The notification step S2000 allows the user to recognize the buzzer 40 and the LCD display 60 provided in the monitoring unit 100, for example.

At the same time as the informing step S2000, the monitoring unit 100 performs a machine stop step S4000 for stopping the crimping machine 10 at the time of discriminating an operation error and a fault.

Then, in the machine stopping step S4000, the user carries out a machine operation step S6000 in which the cream pin machine 10 is operated by the foot switch 80 after the operation error and the faulty removal of the crimping machine 10 are eliminated.

To this end, the present invention determines a crimping operation error by the monitoring unit 100, and connects the monitoring unit 100 to the foot switch 80 so as to serve as an intermediate bridge between the crimping machine 10 and the foot switch 80. [

14 to 16, the monitoring unit 100 is connected to the foot switch 80, the monitoring unit 100, and the crimping machine 10, Do not operate the footswitch in the same situation.

In addition, a total of three signal terminals are connected to the monitoring unit 100 from the foot switch. The common terminal COM is one, NO is NO, and NC is NO.

That is, according to the present invention, as shown in FIG. 15 and FIG. 16, when the connection with the first COM is made, the monitoring unit checks whether the crimping machine is operated Can be controlled.

Therefore, the foot switch control method which improves the work safety and the work error discrimination efficiency of the crimping machine according to the present invention, can prevent the accurate signal from the sensor at the moment when the hammer is pressed by the sensor installed in the crimping machine performing the crimping operation It can be easily extracted.

In addition, when a signal is detected with a reference signal when normal operation is performed without error, the measured signal is compared with a measured crimp signal every time a crimping operation is performed, Can easily be monitored.

In addition, if there is an error between the reference signal and the measured signal that is larger than the user-set tolerance, an alarm is sounded through the buzzer and the operation of the machine can be easily stopped.

In addition, the user can easily perform the crimping operation after removing the cause of the error of the operation or correcting the cause of the defect.

In addition, basically, the monitoring unit is turned on, and the crimping machine is set to operate only in the learning mode (TEACH MODE) and the operation mode (OPERATION MODE).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those of ordinary skill in the art that various changes and modifications may be made without departing from the scope of the present invention.

10: Crimping machine 12: Crimp wire
14: Hemmer 16: Anvil
20: sensor 40: buzzer
60: LCD display 80: Foot switch
90: keyboard 100:

Claims (5)

A monitoring step (S1000) of converting, aligning and comparing the crimping signal of the crimping machine in the monitoring part;
A notification step (S2000) of informing a user of an operation error and a failure determination by the monitoring unit;
(S4000) for stopping the crimping machine when it is determined by the monitoring unit that an operation error and a fault are detected;
(S6000) in which a cream pin machine is operated by a foot switch after removing a work error and a defect of a crimping machine. The foot switch control method for improving work safety and operation error discrimination efficiency of a crimping machine .
The method according to claim 1,
The monitoring step S1000 includes a signal processing step of performing crimping by a hammer of a crimping machine, checking the pressure of the hemmer by a sensor, sending out the signal, and converting the transmitted signal into a digital signal by using a high- (S100);
An aligning step (S200) of aligning the reference signal and the crimping signal of the converted working moment;
And a comparison step S400 of comparing and analyzing the two alignment signals to determine whether there is an operation error. The foot switch control method according to claim 1,
The method according to claim 1,
The monitoring unit firstly operates a user to set a reference signal and a tolerance, compares the measured signal with a user-input reference signal in real time so as to perform a crimping operation, A foot switch control method for improving work safety and operation error discrimination efficiency of a crimping machine.
The method according to claim 1,
Wherein the foot switch is configured to detect a crimping operation error by the monitoring unit and to serve as an intermediate bridge between the foot switch and the crimping machine. Footswitch control method.
The method according to claim 1,
Wherein the foot switch is connected to the foot switch, the monitoring unit, and the crimping machine so that the foot switch does not operate in the same situation during error occurrence or program setting by the user in the monitoring unit. A footswitch control method for improving error discrimination efficiency.

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