KR20030054562A - An apparatus for grinding electrode wheel of a strip welding machine - Google Patents

Abstract

PURPOSE: A device for grinding an electrode wheel for a welding machine is provided to uniformly keep the roundness of the electrode wheel by precisely testing the roundness of the electrode wheel and grinding the electrode wheel on the basis of the test value. CONSTITUTION: A roundness testing unit(20) has a roundness measuring sensor(24) installed at one end of a fixing bar(22) and testing the roundness of an electrode wheel. A grinding unit(80) has a first moving base(40) installed at a body(16), a second moving base(50) supported by the first moving base, a third moving base(60) installed at the second moving base and moving vertically, and a grinding roll(70) grinding the electrode wheel.

Description

Electrode wheel grinding device for steel plate welding machine {AN APPARATUS FOR GRINDING ELECTRODE WHEEL OF A STRIP WELDING MACHINE}

The present invention relates to a welder for welding the end and the end of the leading and trailing steel plate in order to carry out the various manufacturing processes such as plating by continuously advancing the steel sheet in the cold rolling line of the steelmaking process, in particular, the welder for welding the steel sheet By measuring the roundness of the welder electrode wheel and automatically grinding the electrode wheel based on the measured value to effectively prevent the welding defect of the steel sheet due to the welding of the steel sheet in the state of poor roundness of the electrode wheel, The present invention relates to an electrode wheel grinding device for a steel plate welder so that the welded state can be maintained firmly at all times.

In general, the cold rolling mill of the steel mill welds the end and the end of the first and subsequent steel sheets to continuously perform various manufacturing processes such as plating of cold rolled steel sheet, the welder of such a steel sheet is shown in FIG.

That is, as shown in FIG. 1, the steel sheet 110, which is released as two pay off reels 100, is cut at its front and end portions by the shearer 120, and then welded on the line ( Through 200, the first and second steel plates 120a and 120b are welded.

On the other hand, Figure 2 shows a welder in such a continuous line.

That is, as shown in Figure 2, the moving unit (carriage) is moved to the front and rear as the cylinder 220 through the L guide (not shown) located in the fixed frame 210, the energization busbar 230 to the moving unit ) And a swaging roll 232, and a welding electrode wheel 240 for welding the steel plate 120 and cutting units 250a and 250b for cutting the steel plate 120 are provided.

In addition, the electrode wheel 240 is a circular electrode, the upper electrode wheel 240a is down (DOWN) while the overlapping portions of the preceding and the following steel plate 208 is fixed by a clamp (not shown), the upper and lower electrode wheels When the steel plate 120 is in close contact between the 240a and 240b, the overlapping portions of the steel plate 120 travel in the cylinder 220 while the upper electrode wheel 240a is pressurized at a constant pressure as a down cylinder (not shown). By traveling at a constant speed through the heat generated by the electric resistance heat to weld the overlapping portion of the steel sheet (120).

However, as shown in FIG. 3, the electrode wheel 240 of the welding machine as described above welds the overlapping portions of the line and trailing steel plates 120a and 120b at a predetermined pressure, and thus the electrode wheel 240 is welded. In many cases, the roundness of?) Is shown in FIG. 3A, which shows an electrode wheel 240 ′ having a poor roundness, and FIG. 3B illustrates a normal electrode wheel 240 having a good roundness. The wheel 240 'can be visually checked.

On the other hand, as shown in FIG. 4, if the roundness of the electrode wheel 240 is poor as described above (240 ′), the welded portion of the steel sheet is not uniformly welded in the width direction thereof (FIG. 4A). 4B shows a welded portion of the steel plate welded with the normal electrode wheel 240.

Therefore, the roundness of the electrode wheel 240 in the welder 200 is important, because the welded steel plate 120 is broken during the continuous process, the welding site is broken, and eventually stops the operation of the cold rolling continuous line. This is because it causes a serious problem, and therefore, the electrode wheel 240 ′ with poor roundness is ground.

That is, in the related art, a worker grinds the surface of the electrode wheel 240 'having poor roundness by using a hand grinder to maintain the roundness of the electrode wheel 240'.

However, in the conventional grinding operation of the electrode wheel 240 'as described above, as the worker grinds by hand, it is quite difficult to restore the roundness of the actual electrode wheel 240' normally. In most cases, only foreign substances are removed.

Moreover, there is a problem that a worker shortens the life of the electrode wheel 240 'while grinding the part of the electrode wheel 240' excessively while using the hand grinder to grind the surface of the electrode wheel 240 '.

In addition, as shown in FIG. 5, although the grinding knife 260 equipped with the air cylinder 262 is rotated at high speed by the power of the air motor, surface grinding of the electrode wheel 240 is performed, but the electrode wheel 240 ' It is difficult to restore the roundness of).

As a result, since the operator visually checks the poor roundness of the electrode wheel 240 as described above, it is more difficult to restore the roundness of the electrode wheel through accurate grinding.

Therefore, it would be more desirable to inspect the roundness of the electrode wheel of the welder performing the welding of the steel line and the subsequent steel plate for the continuous process of the steel sheet, and to grind the electrode wheel without manual operation by the operator.

The present invention has been made in order to solve the various problems as described above, the object of the present invention is to precisely inspect the roundness of the welder electrode wheel, and to perform the surface grinding of the electrode wheel based on the inspection measurement without manual operation of the operator The present invention provides an electrode wheel grinding device for a steel plate welder in which the roundness of the welder electrode wheel is always kept constant so that the welding of the steel sheet is always performed.

Another object of the present invention is to maintain the roundness of the electrode wheel of the welder at all times, to prevent the welding failure of the steel sheet due to poor roundness to prevent the line interruption due to breakage of the welding part during the continuous process of the steel sheet to manufacture the steel sheet An object of the present invention is to provide an electrode wheel grinding device for a steel sheet welder.

1 is a schematic perspective view showing a welder of a steel sheet in a continuous line of steel sheets

2 is a schematic front view showing the configuration of a general welding machine;

Figure 3 shows a roundness bad state of the conventional welding machine electrode wheel,

(a) is a schematic diagram showing a worn electrode wheel

(b) is a schematic diagram showing a normal electrode wheel

Figure 4 shows the welding state of the steel sheet by the bad electrode wheel,

(a) is a schematic diagram showing a bad state of a weld;

(b) is a schematic diagram showing the normal state of the welded portion;

Figure 5 is a schematic diagram showing the grinding operation of the conventional welder electrode wheel poor roundness

Figure 6 is a perspective view showing the electrode wheel grinding device of the steel plate welder according to the present invention

Figure 7 is an exploded perspective view showing the electrode wheel grinding portion of the present invention device

8 is a main structural diagram showing a lower frame moving configuration of the present invention device;

Figure 9 is a perspective view showing the operating state of the present invention device

10 shows a roundness inspection unit of the present inventors,

(a) Schematic plan view showing roundness inspection operation of electrode wheel

(b) is a schematic diagram showing the maximum and minimum diameter according to the wear of the electrode wheel

Explanation of symbols on the main parts of the drawings

1 .... electrode wheel grinding device 10 .... electrode wheel

12 .... Electrode wheel frame 14 .... Electrode wheel base

16 .... welder body 20 .... roundness inspection part

24 .... Roundness sensor 40,50,60 .... Moving base

42,52,62 .... Guide rail 70 .... Grinding roll

80 .... grinding part

As a technical configuration for achieving the above object, the present invention, the roundness having a roundness measuring sensor is installed inside the tip of the horizontal mounting fixture to inspect the roundness of the electrode wheel on the frame installed so that the upper and lower electrode wheels rotate. Inspection unit; And,

A first moving base installed to move forward and backward on the welder body, a second moving base supported to move left and right to the first moving base, a third moving base installed vertically to the second moving base, and An electrode wheel grinding unit having a grinding roll which is installed to be driven as a motor in a horizontal state on the third moving base to grind an electrode wheel whose roundness is checked; Consists of

The lower electrode wheel frame provides an electrode wheel grinding device of a steel plate welder installed to move up and down to maintain a constant distance between the electrode wheels for steel sheet welding by compensating the amount of grinding of the electrode wheel on the lower base horizontally fixed to the welder body. By.

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

Figure 6 is a perspective view showing an electrode wheel grinding device of the steel plate welder according to the present invention, Figure 7 is an exploded perspective view showing the electrode wheel grinding portion of the present invention device, Figure 8 shows a lower frame moving configuration of the device of the present invention 9 is a perspective view showing the operation state of the device of the present invention, Figure 10 is a view showing the roundness inspection of the device of the present invention.

6 shows the overall configuration of the electrode wheel grinding device of the steel sheet welding machine of the present invention, the apparatus 1 of the present invention is largely divided into the electrode wheel roundness inspection unit 20 and the electrode wheel grinding unit 80. Looking at these components 20, 80 in more detail as follows.

First, as shown in FIGS. 6 and 7, the electrode wheel 10 according to the present invention has a lower electrode wheel 10b having a bearing block on a lower base 12b fixed downward on the welder body 16. As shown in the drawing, the upper electrode wheel 110a is mounted on the frame 12a at the lower side of the base 14a, which is mounted to rotate as the upper electrode of the lower electrode wheel 10b. ) Is provided so as to maintain a constant distance S (see FIG. 6) from the lower electrode wheel 10b.

At this time, although not shown in detail in the drawing, the upper and lower electrode wheels 10 are installed on the frame 12 so as to be capable of self-rotation by means of a separate driving source, that is, an air motor, to be welded to the steel sheet. In addition, as will be described in detail later, as shown in FIGS. 7 and 8, the frame 12b of the lower electrode wheel 10b is disposed on an electrode wheel on the lower base 14b horizontally fixed to the welder body 16. Compensated by the amount of grinding of (10), it is provided to move up and down so that the electrode wheel space | interval S for steel plate welding is kept constant.

That is, as shown in FIG. 8, the lower frame 12b is supported on the inner side of the guide plate 99 provided on both sides of the body 16 and horizontally installed on the bottom of the welder body 16. 3, the drive shaft 92 of the drive motor 90 is a bevel gear 96a, 96b of the gearbox 94 fixed to the lower side of the body forward, and is provided with a screw bushing 98a installed inside the lower part of the lower frame 12b. The lower frame 12b is connected on the lower base 14b connected to the body 16 by driving the ball screw 98 when the third drive motor 90 is connected to the ball screw 98 fastened to the ball screw 98. It is configured to move up and down.

Next, FIG. 6 and FIG. 10 show the electrode wheel roundness inspection unit 20 of the apparatus 1 of the present invention. The roundness inspection unit 20 according to the present invention includes the upper and lower electrode wheels 10a (the welding machine). 10b) is provided with a roundness measuring sensor 24 which is installed inside the front end portion of the holder 22 is installed horizontally to inspect the roundness of the electrode wheel 10 to the frame 12 is installed so as to rotate.

That is, as shown in FIGS. 6 and 10, the holder 22 of the roundness inspection unit 20 extends from both sides of the electrode wheel frame 12 to the outer circumferential side along the center line of the electrode wheel 10. The measuring sensor 24 is fixed so as to include a light emitting portion 24a and a light receiving portion 24b which are provided to face each other inside the tip portion 22a of the holder 22 when the electrode wheel 10 is rotated. The maximum diameter (D1) and the minimum diameter (D2) is installed to grind the electrode wheel 10 by the maximum diameter and the minimum diameter difference as the grinding roll (60) through a connected control unit.

Next, FIGS. 6 and 7 show the electrode wheel grinding portion 80 of the apparatus 1 of the present invention. The electrode wheel grinding portion 80 of the present invention is placed on the welder body 16. The first moving base 40 installed to move forward and backward, the second moving base 50 supported to move left and right on the first moving base 40, and the vertical movement of the second moving base 50 vertically. And a grinding roll 70 for grinding the electrode wheel, which is installed to be driven as a motor in a horizontal state on the third movable base 60 and installed on the third movable base 60 in a horizontal state.

That is, as shown in FIG. 7, the first moving base 40 is inserted into both side surfaces of the first moving base 40 of the grinding part inside the first guide rail 42 installed in the welder body 16. Guide protrusions (40a) to facilitate the movement of the integrally formed.

In addition, a side of the first moving base 40 is connected to the first cylinder 46 installed on the holder 44 horizontally mounted to the body 16, the first moving base 40 is the first The cylinder 46 is installed to move forward and backward integrally according to the forward and backward operations.

Next, as shown in FIG. 7, the grinding part is inserted into the second guide rail 52 provided on the upper side of the first moving base 40 similarly to the first moving base on both sides of the second moving base 50. The second guide protrusion 52 which is supported is integrally formed, and the second cylinder 54 is connected on the fixing plate 54a to the rear of the second guide rail 52 to connect the second cylinder 54. When the drive forward and backward, the second moving base 50 moves left and right on the second guide rail 52.

By the way, although the second cylinder 54 is schematically illustrated in the drawings, the second cylinder 54 controls the forward and backward movement of the second moving base 50, so that the control of air, which is the driving source of the cylinder, is performed to precisely perform the forward and backward motion. The operation of the cylinder 54 is controlled through a precise control valve, because the forward amplitude of the second moving base 50 affects the grinding operation of the grinding roll 70 described later.

Next, as shown in FIG. 7, the third moving base 60 is mounted to move vertically to the third guide rail 62 vertically installed on the second moving base 50. On the rear surface of the 60, guide protrusions 60a inserted into and supported by the third guide rails 62 are integrally formed.

On the other hand, the rack gear plate 64 is mounted on the side of the third moving base 60 in the vertical direction, and the rack gear plate on the third guide rail 62 on which the third moving base 60 is supported. A drive sprocket 68a of the first drive motor 68 horizontally fixed to the pinion gear 66 engaged with the 64 and horizontally installed as a bracket 68b at the rear of the third guide rail 62. A driving chain 61 is connected to the driven sprocket 66a connected to the rear of the pinion gear 66 so that the third moving base 60 is connected to the third guide rail 62 when the first driving motor 68 is driven. Will move vertically.

At this time, since the first driving motor 68 also affects the grinding of the electrode wheel 10 of the grinding roll 70 similarly to the second cylinder 54, a submotor capable of precisely controlling the driving amount is used. Preferably, the pinion gear 66 is fixed horizontally through a bearing (not shown) on the fixed plate on the side of the third guide rail 62, the rack gear plate 64 of the third moving base side When the motor is stopped, the lowering of the third moving base 60 is interrupted. At this time, although not shown in the drawing, the third moving base 60 may have a separate stopper.

Next, the grinding roll 70 of the grinding portion 80 of the present invention, the second drive horizontally mounted on the bracket (74a) on the horizontal stage 72 horizontally fixed to the front surface of the third moving base 60 The shaft is connected to the motor 74 so as to be rotated when the motor is driven.

In this case, since the second driving motor 74 also affects the grinding force of the grinding roll 70 similarly to the first driving motor 68, it is preferable to use a submotor capable of precisely controlling the rotational force. Although not shown in the drawings, the suction roll 70 may suction a suction pipe to suction the dust so that the dust scattered during grinding of the electrode wheel 10 by the grinding roll 70 does not fall on the steel sheet through the welding machine. It would be desirable to arrange the cover close to the grinding of the electrode wheel 10 or to install a flexible cover inducing dust in the cushion duct.

6, the cylinders 46, 54 and the driving motors 68, 74, 90 which provide a driving source in the electrode wheel grinding device 1 of the present invention are the welder base 16. It is configured to be electrically connected to the operating panel (C1) and the control panel (C2) installed on the side to control the respective drive.

Referring to the operation of the present invention made in the above configuration in detail as follows.

As shown in Figure 6 to 10, the welding machine electrode wheel 10 for welding the line, the trailing steel plate for the continuous process of the steel sheet without the operator's manual roundness, that is, the maximum diameter (D1) and minimum diameter (D2) Inspect the difference and grind the electrode wheel 10 only by the difference, and raise the frame 12b of the lower electrode wheel 10b by the amount of grinding so that the welding spacing S of the electrode wheel 10 is kept constant. The electrode wheel grinding device 1 of the steel plate welder of the present invention to be as follows.

First, the apparatus 1 of the present invention is installed between the swaging roll 232 (Fig. 2) of the welding machine and the electrode wheel 10 shown in Fig. 6, the leading and trailing steel plate (120a) (120b) (Fig. 1). In the state where welding is completed as the upper and lower electrode wheels 10a and 10b, the moving part of the welding machine in which the electrode wheel 10 and the swaging roll 232 are opened is opened. In the state of reaching the device 1 of the present invention, the roundness of the electrode wheel 10 is inspected, and the inspection value is ground to the upper and lower electrode wheels 10a and 10b as the grinding roll 70, This will be described step by step.

First, in the apparatus 1 of the present invention, first, the roundness of the upper and lower electrode wheels 10a and 10b is inspected by the electrode wheel roundness inspection unit 20. As shown in FIGS. The electrode wheel 10a as a measuring sensor 24 provided inside the tip end of the holder 22 horizontally installed to check the roundness of the electrode wheel 10 on the frame 12 on which the lower electrode wheels 10a and 10b are rotated. Check the roundness of (10b).

That is, as shown in Figure 10b, the laser beam emitted from the light emitting portion 24a of one side of the sensor 24 located in the interior of the fixing table 22, the light receiving portion 24b according to the diameter difference of the electrode wheel (10) As shown in FIG. 10B, the smallest diameter D2 and the largest diameter D2 with less wear are measured and received at the control panel C2, that is, the process control computer shown in FIG. If it is sent, the said control panel will operate the grinding part 80 next to grind the diameter difference.

At this time, the predetermined roundness setting value, for example, the grinding to the maximum diameter / minimum diameter within 5/100 mm, if the difference is too large, the grinding operation takes too long, or the grinding roll drive servomotor for grinding (74) ) Is overloaded.

Next, as shown in FIG. 7, when the roundness test of the electrode wheel 10 as described above is completed and the grinding amount is determined, the first cylinder 46 of the grinding unit 80 is advanced to the first moving base 40. ) Is moved along the first guide rail 42 as the proximity sensor S1 (S2) disposed at a predetermined distance in front of the first guide rail 42 with the movement width adjusted, and then the second cylinder 54 is driven to move the second movement. The base 50 is advanced along the second guide rail 52, and the first driving motor 68 of the third guide rail 62 installed on the second moving base 50 is operated to drive the chain 61. The rack gear plate 64 meshed with the pinion gear 66 connected to the driven sprocket 66a driven by () moves the third moving base 60 fixed to the side up and down.

Accordingly, the moving bases 40, 50 and 60 are moved in accordance with the grinding amount determined through the control panel C2 and the operating panel C1 shown in FIG. 6, so that the front of the third moving base 60 is moved. Contact with the electrode wheel 10 of the grinding roll 70 arranged horizontally is precisely performed.

As a result, when the third driving motor 74, that is, the sub-control motor is operated, the grinding roll 70 grinds the upper and lower electrode wheels 10a and 10b by the determined grinding amount.

However, as shown in FIG. 6, when the upper and lower electrode wheels 10a and 10b as described above are ground, the spacing S between the electrode wheels 10, that is, the welding thickness of the steel sheet is constant. Since the interval to be maintained is changed, the falling width of the upper electrode wheel 10a is determined, so that the interval is adjusted by raising the lower electrode wheel 10b.

That is, as shown in FIG. 8, when the bottom third drive motor 90 of the base 14b is driven, the ball screw 98 engaged with the drive shaft bevel gear 96a that rotates as a bearing in the gearbox 94 is used. When the bevel gear 96b rotates, and the ball screw 98 is driven to rotate in turn, the lower frame 14b in which the screw bushing 98a to which the ball screw 98 is fastened is installed in the lower side of the lower frame 14b has a base ( Ascending from the inside of the guide plate 99 provided in 14b), and eventually maintain a constant distance (S) between the upper electrode wheel (10a) and the lower electrode wheel (10b).

Accordingly, according to the apparatus 1 of the present invention, the roundness of the electrode wheel 10 is measured by grinding its difference between the minimum and maximum diameters, and the difference between the roundness of the electrode wheel is kept constant so that the welded steel sheet is kept. The strength is uniformly maintained in the width direction to prevent breakage of the welded steel sheet during the continuous steel sheet process.

As described above, according to the electrode wheel grinding device of the steel plate welder of the present invention, the roundness of the welder electrode wheel for welding the steel plate and the subsequent steel plate for the continuous process of the steel sheet is first inspected precisely, and based on this, the electrode wheel is not manually By precisely grinding, it is possible to provide an effect that the welded portion of the steel sheet by the welder is always firmly welded.

Therefore, the welded continuous steel sheet is produced through the line smoothly without defects such as breakage of the welded part during the continuous process, so that the continuous productivity of the steel sheet can be improved and the product reliability of the steel sheet can be provided to the demander. To provide an excellent effect.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to know that those who have knowledge of this can easily know.

Claims (6)

In the roundness inspection of the welding machine electrode wheel 10 for welding the steel line and the subsequent steel plate in the continuous steel sheet manufacturing process and the grinding device (1), The roundness measuring sensor 24 is installed inside the front end of the holder 22 horizontally installed so as to inspect the roundness of the electrode wheel 10 on the frame 12, the upper and lower electrode wheels (10a, 10b) are rotated so as to inspect the welder. Roundness inspection unit 20 having; And, A first moving base 40 installed on the welder body 16 to move forward and backward, a second moving base 50 supported to move left and right on the first moving base 40, and the second moving base ( Grinding roll (70) for grinding the electrode wheel, the roundness of which is installed to be driven as a motor in a horizontal state on the third moving base (60) and vertically installed on the third moving base (60) in a vertical direction to 50) Electrode wheel grinding unit 80 having a; Consists of The frame 12b of the lower electrode wheel 10b compensates the amount of grinding of the electrode wheel on the lower base 14b horizontally fixed to the welder body 16 to uniformly maintain the electrode wheel spacing S for welding the steel sheet. Electrode wheel grinding device for steel plate welder, characterized in that it is installed to move up and down to maintain According to claim 1, The roundness 22 of the roundness inspection unit 20, It is fixed to extend along the center line of the electrode wheel 10 from both sides of the electrode wheel frame 12 to the outer peripheral side thereof, The measuring sensor 24 is composed of a light emitting portion 24a and a light receiving portion 24b which are installed to face each other inside the tip portion 22a of the fixing stand 22, and the maximum diameter D1 when the electrode wheel 10 rotates. Electrode wheel grinding device of the steel plate welder, characterized in that installed to grind the electrode wheel 10 by the maximum diameter and the minimum diameter as the grinding roll (60) through the control unit connected to sense the minimum diameter (D2) The first moving base 40 of the grinding part 80 is inserted to move inside the first guide rail 42 provided in the welder body 16, and the first moving base 40 is moved. The electrode of the steel plate welder, characterized in that the first cylinder (46) installed on the holder 44 horizontally mounted to the body (16) is connected to the side of the body (40) so as to move back and forth when the cylinder (46) is driven. Wheel grinding equipment 2. The second moving base 50 of the grinding part 80 is inserted and supported to be moved to the second guide rail 52 provided on the upper part of the first moving base 40. The second cylinder 54 installed on the upper side of the two guide rails 52 is connected to the rear side thereof, and configured to move left and right when the cylinder 54 is driven. The third moving base 60 is mounted on the third guide rail 62 vertically installed on the second moving base 50 so as to move upward and downward. The rack guide plate 64 is mounted on the side surface of the third moving base 60 in a vertical direction, and the third guide rail 62 on which the third moving base 60 is supported. The pinion gear 66 engaged with the rack gear plate 64 is fixed to rotate, and the drive sprocket 68a and the pinion of the first drive motor 68 horizontally installed at the rear of the third guide rail 62. The driving chain 69 is connected to the driven sprocket 66a connected to the rear of the gear 66 so that the third moving base 60 is configured to vertically move along the third guide rail 62 when the motor is driven. Grinding wheel for steel plate welding machine According to claim 1, wherein the grinding roll 70, the shaft is connected to the second drive motor 74 installed on the horizontal stage 72 horizontally fixed to the front surface of the third moving base 60 to rotate when the motor drive Installed to drive, The lower frame 12b is a bevel gear 96a of the gearbox 94 in which the drive shaft 92 of the third drive motor 90 horizontally installed at the bottom of the welder body 16 is fixed to the lower side of the body in front thereof. Ball screw 98, which is vertically driven as a 96b, is fastened to a screw bushing 98a fixed to the lower inner side, and guide plates 99 installed on the body 16 are supported on both sides of the frame 12b. Electrode wheel grinding device for steel plate welder, characterized in that configured to move up and down when driving the third motor