KR20050013806A - Apparatus for mounting welding wheel - Google Patents

Abstract

PURPOSE: A welding wheel fixing apparatus is provided to improve stability of welding process, and to prevent breakage by restricting deformation of the welding wheel during a lap welding process and by separating and replacing deformed welding wheel easily and quickly. CONSTITUTION: A welding wheel fixing apparatus is composed of a main frame(102) having a base part opposed to the edge of a welding wheel(200) and a fixing side plate integrally extended from the end of the base and arranged in a line with the welding wheel, a sub frame(150) hinge-combined with the end of the base of the main frame and extended in a line with the other side of the welding wheel, a welding wheel shaft turned and combined with the fixing side plate of the main frame and the sub frame and composed of a wheel fixing projection, a motor(140) driving a welding wheel gripping member, and an idle roll inclined, contacted to the edge of the welding wheel and mounted in the base of the frame.

Description

Welding Wheel Fixture {APPARATUS FOR MOUNTING WELDING WHEEL}

FIELD OF THE INVENTION The present invention relates to a welding wheel fixture for use in a welder that aligns a pair of welding wheels in a row to perform overlapping welding of preceding and subsequent coils in the nip of these welding wheels, and more particularly to performing welding operations. The invention relates to a welding wheel holding device which can prevent deformation of the welding wheel during and which can easily detach and replace the deformed welding wheel.

In general, at the entrance of the cold rolled steel sheet continuous production process, welding is performed using a welding facility to connect the rear end of the preceding coil product with the front end of the subsequent coil product.

The welded part passes through the roll installed in the production process, and the rear end of the preceding coil pulls the front end of the subsequent coil by the given tension in each position. At this time, because a very large tension acts at each position, the plate breaks when there is a welding failure in the preceding and subsequent coils. This causes a large plant accident and long line outages, thus reducing productivity. In addition, since the repair work is performed manually by a worker, there is a potential risk of a safety accident.

One of the causes of welding failure as described above is that the upper and lower welding wheels undergo side deformation due to high heat during repeated overlap welding of a plurality of preceding and subsequent coils. One example of such a side deformation is shown well in FIG. 1, which is a side view of a prior art welding wheel for overlap welding.

Referring to FIG. 1, the overlap welding machine 10 includes a pair of upper and lower welding wheel fixing devices 12a and 12b. The welding machine 10 has a front end of the preceding coil 18a and a front end of the subsequent coil 18b in a state of holding the upper and lower pairs of the welding wheels 14a and 14b by the welding wheel fixing devices 12a and 12b. Welding while pressing in the nip of the pair of welding wheels 14a and 14b.

Since such welding is performed at a high temperature, as the welding operation is repeated, the edge of the upper welding wheel 14a is deformed to the right as indicated by reference numeral 16a, and the edge of the lower welding wheel 14b is indicated by reference numeral 16b. It is transformed to the left as shown. Of course, when the front end of the subsequent coil 18b is located below the rear end of the preceding coil 18a, the deformation portions of the up and down welding wheels 14a and 14b will be formed at opposite positions.

As described above, when the side of the welding wheel is deformed, the deformation part is manually ground or the welding wheel is separated by grinding while the welding wheel is mounted on the fixing device. When disassembling for manual grinding, loosen the bolts of the two wheel body fixing covers, then remove the socket and loosen the fixing bolts of the wheel cover to remove only the wheels. The grinder is then ground using a manual grinder. As such, the wheel grinding operation using the manual grinder is repeated, the roundness of the welding wheel is poor, and the wheel usage cycle is shortened due to the excessive amount of manual grinding. In addition, there is a problem that effective welding wheel management is not made, such as increasing work fatigue and avoiding work due to the trouble of disassembly and assembly when performing manual grinding or replacing wheels.

Therefore, the present invention has been made to solve the above-described problems of the prior art, the object of the present invention is to prevent deformation of the welding wheel during the welding operation in the overlapping welding machine and to easily separate and deform the modified welding wheel It is an object to provide a replaceable welding wheel fixture.

1 is a front view of an overlap welding machine according to the prior art.

2 is a front view of a welding wheel fixing device used for the overlap welding machine according to the present invention.

3 is an exploded view of the welding wheel fixing device of FIG.

4 is a perspective view of FIG. 3, FIG. 4A shows a main frame, a wheel shaft and a welding wheel, and FIG. 4B shows a subframe.

5 is an enlarged exploded perspective view of a portion B of FIG. 4A.

6 is a front view of the welding wheel fixing device with the subframe open.

<Explanation of symbols of main parts in drawings>

100: wheel fixing device 102: main frame

110, 170: cylinder 114, 162: idle roll

118: wheel shaft 140: motor

150: subframe 200: welding wheel

According to a feature of the present invention for achieving the object of the present invention described above, a welder for arranging a pair of welding wheels in a row to perform overlapping welding between the leading end of the preceding coil and the leading end of the subsequent coil in the nip of these welding wheels. A welding wheel holding device for use is provided, wherein the welding wheel holding device has a “-” shape and extends in parallel with one side of the welding wheel integrally from one end of the base and the base opposite the edge of the welding wheel. Main frame with fixed side plates; A subframe which is hingedly coupled to the other end of the main frame base and extends in parallel with the other side of the welding wheel; A welding wheel gripping member having one end rotatably coupled to the fixed side plate of the main frame and the other end rotatably coupled to the subframe, wherein a wheel fixing protrusion is formed around the other end; A motor for driving the welding wheel gripping member; And an idle roll mounted on a base inside the frame and inclined contact with an edge of the welding wheel.

Various features and advantages of the present invention will be described in detail as follows in connection with the accompanying drawings.

Figure 2 is a front view of the welding wheel fixing device used in the overlap welding machine according to the invention, Figure 3 is an exploded view of the welding wheel fixing device of Figure 2, Figure 4 is a perspective view of Figure 3, Figure 4A is a main frame and the wheel 4B shows a subframe, FIG. 5 is an enlarged exploded perspective view of part B of FIG. 4B, and FIG. 6 is a front view of the welding wheel holding device with the subframe open.

2 to 4, the welding wheel fixing device 100 for the overlapping welder according to the preferred embodiment of the present invention may be hinged to the main frame 102 and the main frame 102 having a generally “-” shape. It has a combined sub-frame 150. The main frame 102 has a base 104 opposite the edge of the received weld wheel 200 and a fixed side plate 106 extending downwardly integrally from one end (left end in the figure) of the base. A space 108 is formed inside the base 104, and a fixing block 112 that is vertically moved by the cylinder 110 is provided in the space 108. Inside the lower end of the fixing block 112 is provided a pair of audile roll 114 is opened at a predetermined angle to contact the edge of the welding wheel 200. When the idle roll 114 is moved downward by the operation of the cylinder 110 is rotated while pressing the edge of the welding wheel 200 to a predetermined pressure.

On the other hand, the side plate 106 of the main frame 102 is formed with a hole 116 for rotatably accommodating the wheel shaft 118 via the socket 130. The wheel shaft 118 is a cylindrical member whose one end 120a is inserted into the hole 116 via the socket 130, and the hole 134 of the side plate cover 132 attached to the side plate 106 is closed. It protrudes beyond the side plate cover 132 through. The wheel shaft 118 has a gear 124, a wheel contacting portion 126, and a wheel gripping protrusion 127 formed from one end 120a to the other end 120b, and an air passage 128 is drilled therein. The wheel gripping protrusion 127 is inserted into the groove 204 of the welding wheel 200 when the other end 120b of the wheel shaft 118 is inserted into the hole 202 of the welding wheel 200 so that the wheel shaft 118 During the rotation of the welding wheel 200 is also rotated. At one end 120a, the narrow axial protrusion 122 protrudes and is coupled to the air injector 136 on the left side of the side plate cover 132 to receive the air injected therefrom. The air injector 136 is fixed to the axial protrusion 122 of the wheel shaft 118 by the air injector fixing member 138. On the upper side of the air injector 136, a motor 140 is mounted to the side plate 132 and the shaft 142 of the motor 140 extends through the holes 134b and 116b of the side plate cover 134 and the side plate 106. And engaged with the electric gear 144 meshed with the gear 124 of the wheel shaft 118.

On the other hand, the sub-frame 150 of the welding wheel fixing device 100 is a plate 152 which is hingedly mounted to the base 104 of the main frame 102 by the pin 146 and the inner side of the plate 152. And a cylindrical portion 154 extending toward the main plate side plate 106.

A space is formed inside the cylindrical portion 154, and the protrusion 156 on which the inclined portion 158 is formed protrudes. The inclined portion 158 is formed at the same angle as the inclined portion 129 of the wheel shaft 118 so that the inclined portion 158 of the protrusion 156 when the cylindrical portion 154 receives the wheel shaft 118. Is engaged with the inclined portion 129 of the wheel shaft 118. In addition, an air passage 160 is formed inside the protrusion 156 to be connected to the air passage 128 of the shaft 118 when the cylindrical portion 154 receives the wheel shaft 118. On the other hand, four idle rolls 162 are provided at the end of the cylindrical portion 154. These rolls 162 are formed when the welding wheel 200 is mounted to the wheel shaft 118 and the subplate 150 is closed as shown in FIG. 2 to engage the cylindrical portion 154 and the shaft 118. A right side of the drawing of FIG. In this case, when the shaft 118 and the welding wheel 200 are rotated by the motor 140, the rotation of the welding wheel 200 is guided.

The air passage 160 leads to the air ejector fixing protrusion 164 opposite the protrusion 158, and the air exhauster 166 is coupled to the fixing protrusion 164. Therefore, the air injected by the air injector 136 and flowed through the air passages 128 and 160 is discharged to the outside through the air ejector 166.

The pin fastening protrusion 168 protrudes from the fixing protrusion 164 of the plate 152, and the pin fastening protrusion 148 also protrudes from the main plate 102 opposite thereto. The lower end of the cylinder 170 for hinge hinge the sub-frame 152 to the pin fastening protrusion 148, the end 174 of the shaft 172 of the cylinder 170 is pinned to the pin fastening protrusion 168. This pin is coupled.

On the other hand, since the upper end of the plate 152 is hingedly pinned to the base 104 of the main frame 102 as described above, the sub-frame 102 is coupled to the coupling position by the expansion and contraction of the cylinder 170. It is fastened to and disengaged from the wheel cylinder 118 to have an open position. That is, when the cylinder 170 expands, the subframe 102 is moved to the closed position, that is, the working position of FIG. 2, to fix the welding wheel 200 together with the shaft shaft 118. The cylinder 170 also contracts. The lower subframe 102 is moved to the open position of FIG. 5 to thereby separate the welding wheel 200 from the wheel shaft 118.

On the other hand, reference numeral 180 denotes an overlap welding machine employing the welding wheel failure apparatus of the present invention, and reference numerals 190a and 190b denote preceding coils and subsequent coils.

The welding wheel fixing device for the overlap welder according to the present invention as described above can prevent deformation of the welding wheel during the welding operation in the overlap welder, and by easily separating and replacing the deformed welding wheel, the stability of the welding operation , Prevent plate breaking, minimize downtime and ensure rapid recovery.

Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art may vary the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be appreciated that modifications and variations can be made.

Claims (5)

A welding wheel fixture for use in a welder that aligns a pair of welding wheels in a row to perform overlapping welding between the rear end of the preceding coil and the leading end of the subsequent coil in the nip of these welding wheels. A main frame having a “a” shape and having a base opposite the edge of the welding wheel and a fixed side plate extending along one side of the welding wheel integrally from one end of the base; A subframe which is hingedly coupled to the other end of the main frame base and extends in parallel with the other side of the welding wheel; A welding wheel shaft having one end rotatably coupled to the fixed side plate of the main frame and the other end rotatably coupled to the subframe, wherein a wheel fixing protrusion is formed around the other end; A motor for driving the welding wheel gripping member; And And an idle roll mounted on a base of the frame and inclined contact with an edge of the welding wheel. The apparatus of claim 1, further comprising a cylinder mounted at the other end of the base of the main frame and having an end of the shaft coupled to the outer surface of the subframe to hinge the subframe with respect to the main frame. Welding wheel fixture. The welding wheel fixing device according to claim 1, wherein the idle roll comprises a pair of rolls spreading toward the welding wheel at the same angle. The welding wheel fixing device according to claim 1, further comprising a fixing block for fixing the idle roll and a cylinder for moving the fixing block toward the welding wheel, in the main frame. The welding wheel fixing device according to claim 1, wherein the subframe has at least one idle roll in contact with a side of the welding wheel.