KR100270106B1 - Automatic control device and method of welding machine wheel space - Google Patents

Abstract

PURPOSE: An automatic adjusting device for an interval between wheels of a welder and an adjusting method thereof are provided to prevent strip welding trouble and to enhance productivity by automatically adjusting the height of a lower wheel without manually measuring the interval between wheels and stopping a production line. CONSTITUTION: An automatic adjusting device for an interval between wheels(114a,114b) of a welder(100) contains an arm(12) placed in one side of a welder body(110); a pneumatic cylinder(14) horizontally moving the arm; limit switches(18a,18b) limiting the horizontal movement of the arm; a welding wheel interval measuring unit(10) having a proximity sensor measuring an interval between wheels and transmitting an electric signal in one side of the arm; a drive motor(33) lifting and dropping the lower wheel in one side of the arm; a supporter of the lower wheel connected to the rotating shaft of the drive motor through a deceleration gear unit(35); and a pair of limit switches limiting the horizontal movement of the lower wheel. The drive motor and the limit switches for the lower wheel place the proximity sensor in the upper and the lower wheel by driving the pneumatic cylinder when a welding wheel lifting unit(30) and the welder body reach a home position. Then, the proximity sensor continuously senses an interval between wheels to drive the drive motor. Thus, a controller(50) compensates the measured interval with a predetermined interval in a memory unit.

Description

Automatic Welder Wheel Spacing and Method

1 is a block diagram of a general welding machine according to the prior art.

Figure 2 is a schematic diagram showing the overall welder wheel spacing automatic adjustment device according to the invention.

3 is a block diagram of the welder wheel spacing automatic adjustment device according to the invention mounted on the welder.

4 is a flow chart for implementing a method for automatically adjusting the welder wheel spacing according to the present invention.

* Explanation of symbols for main parts of the drawings

10: welding wheel gap measurement part 12: a type arm

16: pedestal 20: proximity detection sensor

30: welding wheel lifting unit 33: drive motor

35: reduction gear part 38a, 38b: limit switch

50: control device 100: welding machine

110: body portion S: strip

The present invention relates to an apparatus and a method for automatically adjusting the upper and lower wheel spacing of the welder, and more specifically, to accurately adjust the height of the lower wheel by automatically measuring the distance between the upper and lower wheels of the welder, accurate wheel spacing. The present invention relates to a welding machine wheel spacing automatic adjustment device and method to prevent welding failure of the strip according to the setting, thereby improving work productivity.

In general, continuous galvanized steel sheet manufacturing equipment is equipped with an automatic welding machine (100) connecting the strips. In addition, the weldability of the automatic welding machine 100 is a trend that is acting as an important factor in the continuous installation with the increase in size and speed of the equipment.

In particular, the steel to be welded is diversified, the thickness of the strip (S), the smooth operation of the welder 100 at the time when the ultra-thin is greatly affected on the productivity.

1 shows an automatic welding machine 100 according to the prior art. The welder 100 uses electrical resistance, and a shearing machine 112 is positioned inside the c-shaped body part 110, and a roller-shaped welding wheel 114a facing up and down on one side thereof. ), 114b are mounted to the c-shaped body 110 by the height adjusters 116a, 116b. In addition, a driving cylinder 120 is positioned outside the c-shaped body 110, and the actuating rod 120a is connected to the c-shaped body 110 so that the c-shaped body 110 is left. It is configured to move to the right, the welding wheels (114a, 114b) to the left and right of the c-shaped body portion 10 is to overlap the strip and the strip (S) to be electrically connected to each other.

In this case, the welding wheels 114a and 114b are made of a material having excellent electrical conductivity, such as copper, and the overlapping strips S have a major component of iron (Fe), thereby increasing electrical resistance in the strip portion. Thus, welding is performed as a result of the heat generation, and the welding wheels 114a and 114b form a weld by being rotated in the width direction of the strip.

And, such an automatic welding machine 100, if any abnormal wear or irregularities such as grooves are generated on the outer peripheral surfaces of the welding wheels (114a), (114b), or if foreign matter is attached to the welding site of the strip (S) This results in poor welding of the part, which causes the breakage of the welding part of the strip by lowering the connection strength of the strip, resulting in a large equipment accident. Therefore, in order to solve the problem, when the welding wheels 114a and 114b complete the welding operation, the operator checks the state of the welding wheels 114a and 114b with the naked eye, and then sends it to the dresser 130. By polishing the welding wheels 114a and 114b in this way, the diameters of the welding wheels 114a and 114b are reduced. Therefore, the gap between the lower wheels 114a and 114b, which has already been set, becomes larger after a certain period of time, so that the lower welding wheel lifting lever (not shown) is used while the production line is stopped. By adjusting the position of the lower welding wheel 114b, the distance between the upper and lower welding wheels 114a and 114b is adjusted.

However, the manual labor of such an operator causes measurement errors, and it is difficult to find an optimal adjustment timing. In addition, when adjusting the interval between the upper and lower welding wheels (114a), (114b), because the work must be made in the state of stopping the production line is also a factor of the productivity decrease.

The present invention has been made to solve the conventional problems as described above, the object is that the operator does not measure the distance between the upper and lower wheels of the welder by hand, the height of the lower wheel without stopping the production line It is to provide a welding machine wheel spacing automatic adjustment device and method to automatically prevent the welding of the strip according to the correct wheel spacing, and improve the work productivity according to the automatic adjustment.

As a technical means for achieving the above object, the present invention,

In the device for automatically adjusting the upper and lower wheel spacing of the welding machine equipped with continuous hot-dip galvanized steel sheet equipment,

Equipped with an a-type arm positioned at one side of the welder body portion, a pneumatic cylinder for moving the arm forward and backward, and a limit switch for limiting forward and backward movement of the arm, while one side of the arm has a top, Welding wheel gap measurement unit having a proximity sensor for measuring the distance between the lower weld wheels to transmit electrical signals,

A driving motor for raising and lowering the lower wheel is provided, and the support shaft of the lower welding wheel is connected to the rotating shaft of the driving motor through a reduction gear, and a pair of limit switches for limiting the raising and lowering of the lower welding wheel are mounted. On the other hand, the drive motor and the limit switch is a welding wheel lifting unit mounted to the body portion of the welding machine, and

When the body of the welder reaches the home position, the pneumatic cylinder is operated to position the proximity sensor on the upper and lower welding wheels, and the gap between the upper and lower welding wheels measured by the proximity sensor is continuously received. By operating the drive motor of the welding wheel lifting unit by providing a welding device wheel gap automatic adjustment device, characterized in that it comprises a control device for matching the measured interval in advance with the set interval stored in the storage device.

In addition, the present invention, in the method for automatically adjusting the upper and lower wheel spacing of the welder provided in the continuous hot-dip galvanized steel sheet equipment, the control unit detects the standby position of the welder, the gap between the upper and lower welding wheels Positioning a sensor for measurement to the side of the welding wheel; if the control device detects an operating state of the sensor and is not normal, placing the sensor at the same time as issuing an alarm; and the measured value by the sensor is controlled. In case it is not larger than the actual value of the step of returning the sensor to the home position, if the measured value by the sensor is greater than the setting value of the control device, raising the lower wheel through the control device, by the sensor If the measured value does not coincide with the setting value of the control device, the method returns to the step and the measured value and the set value By adjusting to match this, and the step of positioning the sensor from the welding wheel to the original position by the automatic welder wheel spacing method characterized in that it comprises.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

An apparatus and method for automatically adjusting a welder wheel spacing according to the present invention are shown in FIGS. 2 to 4. First, the welding machine wheel spacing automatic adjusting device 1 has a welding wheel spacing measuring part 10 located at one side of the welder body part 110, and the welding wheel spacing measuring part 10 of the welding machine 100 The c-shaped body portion 110 is provided with an a-line arm 12, and a pneumatic cylinder 14 for moving the arm 12 before and after. The a-arm 12 is mounted on a pedestal 16 with a plurality of rulers 16a mounted on a lower surface thereof, and the rear side of the pedestal 16 is controlled by the control device 50 to be described later. Is connected to the rod 14a of the pneumatic cylinder 14 is configured to move the arm 12 before and after through the pedestal 16 by the operation of the pneumatic cylinder 14, the front of the arm 12, A pair of limit switches 18a, 18b for limiting post-movement are provided adjacent to one side of the rod 14a, and a touch bar on the rod 14a between the limit switches 18a, 18b. A 19 is provided and the touch bar 19 is in contact with the limit switches 18a and 18b to generate an electrical signal, which is electrically connected to the control device 50. In addition, one side of the arm 12 has a proximity sensor 20 for transmitting an electrical signal by measuring the distance between the upper, lower welding wheels (114a), (114b), the proximity sensor 20 Is made of a near field sensor (PX Sensor), the sensor 20 is also electrically connected to the control device (50).

On the other hand, the gap between the upper and lower welding wheels (114a, 114b) is formed large, the welding wheel lifting portion 30 for raising the lower welding wheel (114b) to adjust the gap is the lower welding wheel (114b) ) Is provided with a drive motor 33 for lifting up and down, and the rotating shaft 33a of the drive motor 33 has a structure connected to the support 36 of the lower welding wheel 114b through the reduction gear part 35. . The driving motor 33 is electrically connected to the control device 50 and is driven forward and reverse, and the reduction gear part 35 is a rotating shaft of the driving motor 33 through a plurality of built-in gear trains (not shown). The forward and reverse rotation of 33a is converted into the up and down movement of the support 36.

In addition, a pair of limit switches 38a and 38b are mounted on the side of the reduction gear unit 35 so as to limit the rising and falling of the lower welding wheel 114b, the limit switches 38a and 38b. Are each electrically connected to the control device 50, and the touch bar 39 is positioned between the limit switches 38a and 38b, and the touch bar 39 is located at one side of the support 36. When the upper and lower ends of the support 36 come into contact with any one of the limit switches 38a and 38b, the limit switches 38a and 38b transmit an electrical signal to the control device 50 to control the control. The device 50 is configured to adjust the height of the support 36 by controlling the operation of the drive motor 33. In addition, the drive motor 33 and the limit switches 38a, 38b are mounted on the body portion 110 of the welder 100 to be movable integrally with the c-shaped body portion 110.

On the other hand, the control device 50 is electrically connected to the pneumatic cylinder 14, the limit switch (18a), (018b) pair of the welding wheel gap measurement unit 10, and the proximity detection sensor 20, the welding wheel It is connected to the driving motor 33 of the lifting unit 30 and the pair of limit switches 38a and 38b, respectively, and when the body 110 of the welding machine 100 reaches the home position, the pneumatic cylinder ( 14, the proximity sensor 20 is disposed adjacent to the upper and lower welding wheels 114a and 114b, and the upper and lower welding wheels 114a and 114b measured by the proximity sensor 20 are operated. ) By continuously operating the driving motor 33 of the welding wheel lifting unit 30 by receiving the interval between the memory device of the control device 50 (not shown) in advance. It is to adjust the height of the lower welding wheel (114b) to match the set interval stored in).

The method for automatically adjusting the wheel spacing of the welder using the welder wheel spacing automatic control device 1 of the present invention having such a configuration will be described below.

As shown in FIG. 4, first, after the start step 200, a step 210 of detecting the standby position of the welder 100 is performed by the controller 50, which is performed at the home position of the welder 100. As the welding machine 100 transmits an electrical signal to the control device 50, the control device 50 recognizes this and proceeds to the next step 220. Then, a step 220 of positioning the sensor 20 for measuring the distance between the upper and lower welding wheels 114a and 114b to the side of the welding wheels 114a and 114b is performed. As the 50 operates the pneumatic cylinder 14, the rod 14a of the pneumatic cylinder 14 is pulled out, which advances the a-shaped arm 12 forward through the pedestal 16, to the arm 12. The attached proximity detecting sensor 20 is disposed adjacent to the welding wheels 114a and 114b of the welder 100. On the other hand, with respect to the operation of the pneumatic cylinder 14, the withdrawal of the arm 12 and the retracting position control are made by a pair of limit switches 18a, 18b, which are the limit switches 18a, ( As the touch bar 19 comes into contact with 18b), an electrical signal is input to the control device 50 so that the control device 50 controls the operation of the pneumatic cylinder 14. When the EMG sensor 20 is disposed as described above, when the control device 50 detects the operation state of the sensor 20 and is not normal, the sensor 20 is moved back to the same place as the issuance of an alarm ( 230). This is to check the detection accuracy of the sensor 20 in advance. If the sensor 20 does not operate normally, a warning sound is transmitted and the operator can repair the sensor 20 by passing the warning sound. will be. And, if the operating state of the sensor 20 is normal, the electrical signal indicating this by measuring the interval between the upper and lower welding wheels 114a, 114b from the sensor 20 is input to the control device 50 And if the measured value by the sensor 20 is larger than the set value embedded in the storage device of the control device 50, and if it is not large, the step 240 of repositioning the sensor 20 is made. . In this case, when the measured value is not larger than the set value, it means that the welding state of the welding wheels 114a and 114b is not large so that normal welding operation can be performed, and thus the sensor 20 is in the original position. And, if the measured value by the sensor 20 is greater than the set value of the control device 50, step 250 of raising the lower wheel 114b through the control device 50 is made, which is the The control device 50 applies a signal to the drive motor 33 to operate the drive motor 33 and raises the lower welding wheel 114b through the reduction gear part 35 and the support 36 to raise and lower the upper and lower parts. The distance between the welding wheels 114a and 114b is appropriately adjusted. In this case, the raising and lowering operation of the lower welding wheel 114b is limited by a pair of limit switches 38a and 38b, which is a touch bar positioned between the limit switches 38a and 38b. When 39 contacts the limit switches 38a and 38b while moving up and down, the control devices 50 are driven by the limit switches 38a and 38b transmitting electrical signals to the control device 50. By controlling the operation of the motor 33, the lower welding wheel 114b is lifted to an appropriate height.

If the measured value by the sensor 20 does not coincide with the set value of the control device 50, the method returns to step 250 to adjust the measured value and the set value to match. Step 260 is performed, which adjusts the distance between the upper and lower welding wheels 114a and 114b through the control device 50 and the welding wheel lifter 30. The distance between the welding wheels 114a and 114b is measured again, and if the measured values do not coincide with the set values, the welding wheels 114a through the control device 50 and the welding wheel lifting unit 30 are again. By adjusting the interval between 114b, the measured value and the set value are coincident with each other. In addition, if the adjustment between the welding wheels 114a and 114b is adjusted to the set value through the series of steps as described above, the sensor 20 is returned to its original position from the welding wheels 114a and 114b. Step 270 and the end step 280 is executed to terminate the series of gap adjustment work between the welding wheels.

As described above, the apparatus and method for automatically adjusting the welder wheel spacing according to the present invention allow the operator to manually adjust the height of the lower wheel without stopping the production line without measuring the gap between the upper and lower wheels of the welder by hand. It is possible to prevent welding defects of the strip due to accurate welding wheel spacing. In addition, there is an advantage to improve the work productivity by maintaining a good interval between the welding wheels without causing measurement errors for each operator.

Claims (3)

In the apparatus for automatically adjusting the gap between the upper, lower wheels (114a), (114b) of the welder 100 provided in the continuous hot-dip galvanized steel sheet equipment, a-arm (12) located on one side of the welder body portion 110 And a pneumatic cylinder 14 for moving the arm 12 forward and backward, and equipped with limit switches 18a and 18b for limiting the movement of the arm 12 before and after the above. One side of the arm 12, the welding wheel gap measuring unit 10 having a proximity sensor 20 for measuring the distance between the upper and lower weld wheels (114a, 114b) to transmit an electrical signal, the lower wheel A drive motor 33 is provided to raise and lower the 114b, and the support 36 of the lower welding wheel 114b is connected to the rotation shaft 33a of the drive motor 33 through the reduction gear unit 35. A pair of limit switches 38a and 38b for limiting the rising and falling of the lower welding wheel 114b are mounted. The motor 33 and the limit switches 38a and 38b may include a welding wheel lifter 30 mounted on the body 110 of the welder 100, and a body 110 of the welder at a home position. When reaching, the pneumatic cylinder 14 is operated so that the proximity sensor 20 is located on the upper and lower welding wheels 114a and 114b, and the upper and lower welds measured by the proximity sensor 20 are measured. A control device which continuously receives the distance between the wheels 114a and 114b and operates the drive motor 33 of the welding wheel lifter 30 so that the measured distance matches the set interval previously stored in the storage device. Welder wheel spacing automatic control device characterized in that it comprises a (50). According to claim 1, The reduction gear unit 35 converts the forward and reverse rotation of the rotation shaft of the drive motor 33 to the up and down movement of the support 36 through a plurality of built-in gear train Welder wheel spacing automatic control device characterized in that. In the method of automatically adjusting the space between the upper, lower wheels 114a and 114b of the welder 100 provided in the continuous hot-dip galvanized steel sheet equipment, the controller 50 detects the standby position of the welder 100. Step 210, positioning the sensor 20 for measuring the distance between the upper and lower welding wheels (114a, 114b) to the side of the welding wheels (114a, 114b) (220), the control device ( If the sensor 50 detects the operating state of the sensor 20 and is not normal, the operation of placing the sensor 20 in the home position at the same time as the issuance of the alarm 230, the measured value by the sensor 20 is controlled by the control device 50. In step 240, the sensor 20 is returned to its original position if it is not larger than the set value of the control unit. When the measured value by the sensor 20 is larger than the set value of the control device 50, Raising the lower wheel 114b through 50, 250, whether the measured value by the sensor 20 matches the set value of the control device 50 If it does not match, return to step 250 to adjust the measured value and the set value to match (260), and the sensor 20 in the home position from the welding wheel (114a, 114b) Welder wheel gap automatic adjustment method characterized in that it comprises a step (270).