JPH079572U - Electrode replacement device for steel strip welding equipment - Google Patents

Abstract

(57) [Summary] [Structure] The carriage 3 that is movable in the width direction of the steel strip,
An electrode replacement device 1 for a steel strip welding device is constructed from the electrode receiving arms 7 and 8 which are attached to the carriage so as to be able to move up and down and move in the traveling direction of the steel strip and which support the electrode plate. [Effect] Since the electrode plate is replaced by the electrode replacement device, the work efficiency is higher and the skill of the worker is higher than that in the conventional one in which the electrode plate is directly replaced by a crane or the like. The burden is greatly reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electrode plate replacement device for replacing an electrode plate of a steel strip welding device.

[0002]

[Prior art]

 For example, in a strand type continuous furnace, a thin steel strip is continuously passed through a heating zone and a cooling zone and subjected to a predetermined heat treatment. Since the steel strip rolled by a rolling mill is wound into a coil, moved, and rewound by a recoiler at the entrance of a continuous furnace, the length is limited. Therefore, the rear end of the previous steel strip and the front end of the next steel strip are welded and joined by a steel strip welding device. The continuous furnace is equipped with a buffer chamber that stores steel strips of a certain length or longer.By supplying the steel strips from the buffer chamber while the bottom of the strip is stationary for welding. , It is designed not to stop the steel strip in the processing zone.

As a steel strip welding apparatus, for example, a flash butt welding apparatus disclosed in JP-A-56-50790 is known. That is, the flash butt welding apparatus is composed of a fixed base 1, a movable base 2, a fixed base electrode 3, a movable base electrode 4, etc. as clearly shown in FIG. 1, and a pair of a pair of broken lines shown in FIG. This is a flash butt (spark butt) welding of steel strips.

[0004]

[Problems to be solved by the device]

 Generally, the electrodes 3 and 4 are basically made of copper, and the weight of one electrode reaches approximately 300 to 400 kg. It is necessary to replace the electrodes 3 and 4 with a new electrode every 10 to 15 days, because spatter from a flash bat is attached to the electrodes 3 and 4, and the electrodes are worn due to contact with the steel strip.

This replacement work is performed manually and with a crane or a hoist crane. For example, four people need two hours to replace four electrodes. That is, the replacement work is not easy and involves the hoisting operation of the crane, so that it is necessary to rely on an expert.

Therefore, an object of the present invention is to provide an electrode replacement device that can be replaced by a normal worker without using a crane.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a carriage that is movable in the width direction of a steel strip, and an electrode plate that is attached to the carriage so as to be movable up and down and movable in the traveling direction of the steel strip. The electrode replacement arm for the steel strip welding device is constructed from the electrode receiving arm.

The electrode receiving arm comprises a first electrode receiving arm for receiving an old electrode plate and a second electrode receiving arm for carrying a new electrode plate, which are mounted on a common lifting frame. Preferably.

[0009]

[Action]

 The electrode replacement device is set between the fixed / movable stands of the steel strip welding device, the old electrode plate is supported by the electrode receiving arm, and the new electrode plate is delivered. When the electrode receiving arm is composed of the first and second electrode receiving arms, the first electrode receiving arm supports the old electrode plate and the second electrode receiving arm supports the new electrode plate.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of the reference numerals. FIG. 1 is an exploded perspective view of an electrode replacement device for a steel strip welding device according to the present invention, in which an electrode replacement device 1 for a steel strip welding device (hereinafter, abbreviated as “electrode replacement device 1”) has four wheels. A trolley 3 provided with two, four column pipes 4 erected on the trolley 3, frame elevating means 5 and 5 arranged between the column pipes 4 and 4, and up and down along the column pipe 4. The elevating frame 6 that moves, the four first electrode receiving arms 7 that are horizontally movable on a relatively upper portion of the elevating frame 6, and the first electrode receiving arms 7 that are horizontally movable on a relatively lower portion of the elevating frame 6. It is composed of four second electrode receiving arms 8 and a ceiling plate 9. Reference numeral 9a is an eye plate for hanging a wire. The details of these configurations and the relationship between the configurations will be described below.

FIG. 2 is a front view of an electrode replacement device according to the present invention, wherein the wheel 2 is rotatably mounted on an axle 11 via a bearing 12, and the axle 11 is further mounted on bearing blocks 13, 13. It is attached to the carriage 3 so as to be movable in the axial direction. When the steering wheel 14 is turned, the coaxial pinion 15 moves the rack 16 on the axle 11. By turning the handle 14, the wheel 2 on the left side of the figure and the wheel behind it move in synchronization with each other to the left and right. The same applies to the two right wheels 2.

As shown in FIG. 1, the elevating frame 6 includes two upper pipes 6a, 6a, two lower pipes 6b, 6b and four vertical pipes 6c, 6c, 6c, 6c and eight cross pipes. A three-dimensional frame is composed of the pipes 6d ... (... indicates a plurality, and the same applies hereinafter). Then, as shown in FIG. 2, the first electrode receiving arm 7 with the free roll 7a and the neck pipe 7b is inserted into the upper pipe 6a. Reference numeral 17 denotes a guide roller, which holds the first electrode receiving arm 7 accurately by receiving the neck pipe 7b. Further, the first electrode receiving arm 7 has upper and lower two upper fingers 7c and lower fingers 7d at its tip. A second electrode receiving arm 8 with a free roll 8a and a neck pipe 8b is also inserted in the lower pipe 6b. The second electrode receiving arm 8 also has upper and lower two-stage upper fingers 8c and lower fingers 8d at its tip.

FIG. 3 is a view showing the connection between the column pipe and the lifting frame of the electrode replacement device according to the present invention. The cross pipe 6d connecting the two upper pipes 6a, 6a is connected to the cross pipe 6d via the bracket 18a. A shaped roll 18 is attached, and the drum-shaped roll 18 abuts the column pipe 4 to guide the elevating frame 6 so as to correctly move up and down.

FIG. 4 is a central sectional view of the electrode replacement device of the present invention, and is an explanatory view of the frame elevating means 5. The frame elevating means 5 includes a hydraulic cylinder 5a mounted upward on the carriage 3, a square block 5c mounted on the tip of a piston rod 5b thereof, and a sprocket rotatably mounted on both side surfaces of the square block 5c. 5d, 5d, chains 5e, 5e meshing with these sprockets 5d, 5d, and a hydraulic pressure generation unit 5f. One end of the chain 5e is fixed to the truck 3 side, and the other end is connected to the lifting frame 6 side. Therefore, if the hydraulic oil of the hydraulic pressure generation unit 5f is sent to the hydraulic cylinders 5a, 5a via the hydraulic hoses 5g, 5g and the piston rods 5b, 5b are moved forward (upward), the elevating frame 6 rises. When the piston rods 5b, 5b are retracted, the elevating frame 6 descends.

The operation of the electrode replacement device having the above-described configuration will be described. First, the operation of the steel strip welding device will be described. 5 (a) and 5 (b) are explanatory views of the operation of the steel strip welding apparatus according to the present invention, in which the steel strip welding apparatus 20 comprises a moving stand 21 on the inlet side and a fixed stand 22 on the outlet side. An upper input electrode plate 23U and a lower input electrode plate 23B are attached to the moving stand 21, and an upper output electrode plate 24U and a lower output electrode plate 24B are attached to the fixed stand 22. Rails 25 and 26 are attached to the movable / fixed stands 21 and 22, and a rotary shearing machine (rotary shear) (not shown) is moved on the rails 25 and 26 in the line cross direction (front and back direction of the drawing). Then, the bottom 27B of the previous steel strip 27 and the top 28T of the next steel strip 28 are trimmed.

As shown in FIG. 5 (a), these cuts are butted against each other at the position marked with x in the figure, and the bottom 27B of the steel strip 27 is strongly sandwiched between the upper and lower electrode plates 24U and 24B on the delivery side. Similarly, the top 28T of the next steel strip 28 is strongly sandwiched between the upper and lower electrode plates 23U and 23B on the entry side. Hydraulic cylinders 29, 29 are used for holding. Next, when the electrode plates 23U, 23B, 24U, 24B are energized, spark butt welding is performed at the position of x, and the bottom 27B of the preceding steel strip 27 and the top 28T of the next steel strip 28 are joined. The distance L1 between the movable / fixed stands 21 and 22 at this time is several tens of mm.

The electrode plates 23U, 23B, 24U, 24B must be replaced with new ones every 10 to 15 days due to contact wear with the steel strip or the like. For replacement, move the moving stand 21 to the right in the drawing to widen the gap between the stands 21 and 22 to about 2 m. The upper electrode plates 23U and 24U should also be raised by about 150 mm. Then, as shown in FIG. 5B, the electrode replacement device 1 of the present invention is set between the stands 21 and 22 according to the following procedure. The electrode replacement device 1 may be put on a drawer rail (not shown) on the front side of the drawing and moved laterally to the rails 25 and 26 of the stands 21 and 22 only when in use.

6 (a) to 6 (d) and 7 (a) to 7 (d) are explanatory views of the operation of the electrode replacement device of the present invention. In the figure, old electrode plates are shown without hatching, and new electrode plates are shown with hatching. First, as shown in FIG. 6A, new electrode plates 24U and 24B are placed on the second electrode receiving arm 8 during standby. Then, the trolley 3 is moved laterally to align the heart of the line with the heart of the trolley 3. The elevating frame 6 is set to the lower limit position in order to lower the center of gravity of the electrode exchanging device 1 to make the overturning moment smaller.

In FIG. 6B, the hydraulic cylinder 5a is started to move the lifting frame 6 to the first level Lv 1 (the matching position between the old lower electrode plate 24B and the lower finger 7d of the first electrode receiving arm 7). After moving (arrow) and advancing the first electrode receiving arm 7, the lower electrode plate 24B (however, the fixing bolt B is removed) is placed on the lower finger 7d of the first electrode receiving arm 7. Transfer (arrow). As a general rule, this transfer work is done manually. Next, as shown in FIG. 6C, the elevating frame 6 is elevated to the second level Lv2 (the matching position between the old upper electrode plate 24U and the upper finger 7c of the first electrode receiving arm 7) and the first electrode The receiving arm 7 is advanced, the empty upper finger 7c is applied to the lower surface of the upper electrode plate 24U, the fixing bolt B is removed, and the upper electrode plate 24U is placed on the upper finger 7c of the first arm 7. In FIG. 6D, the first electrode receiving arm 7 is retracted (arrow). This means that the old electrode plates 24U and 24B to be replaced have been removed.

Next, in FIG. 7A, the lifting / lowering frame 6 is lifted up to the third level L v3 (the matching position between the new upper electrode plate 24U and the fixed stand 22) by the hydraulic cylinder 5a. In FIG. 7B, the second electrode receiving arm 8 is extended (arrow), and the upper electrode plate 24U is fixed to the fixed stand 22 at a predetermined position with the fixing bolt B. In FIG. 7 (c), the second electrode receiving arm 8 is temporarily retracted, and the elevating frame 6 is lowered to the fourth level Lv4 (the matching position between the new lower electrode plate 24B and the fixed stand 22) (arrow), and the lower electrode. The plate 24B is extruded (arrow) and fixed to a predetermined position of the fixed stand 22 with a bolt B. The second electrode receiving arm 8 is now empty. In FIG. 7D, the empty second electrode receiving arm 8 is contracted, and the elevating frame 6 is lowered to the first standby. This completes the exchange of the electrode plates in the fixed stand 22 (the electrode plates 24U and 24B without hatching are removed and the electrode plates 24U and 24B with hatching are attached), and the electrode plate 23U in the moving stand 21 is continued. , 23B should be replaced. Of course, it is free to change the order or exchange both stands 21, 22 at the same time by manpower.

FIG. 8 is a view showing another method of using the electrode replacement device of the present invention. The electrode replacement device 1 described with reference to FIG. 2 is characterized in that the wheel 2 is configured to be movable back and forth in the axle direction. Therefore, when there is no space in the side of the steel strip welding device 20 (see FIG. 5B) to attach the drawer rail, there is a method of use described in FIG. The electrode replacement device 1 suspended by the crane hook 31 and the chain (or wire) 32 is lowered to a position indicated by an imaginary line between the fixed / movable stands 21 and 22, and the wheels 2 and 2 are pulled out to reach the rails 25 and 26. No, the electrode replacement device 1 is properly placed on the rails 25 and 26. It is effective to retract the wheels 2 which are likely to get in the way when moving up and down by a crane, and it is preferable when the rails 25 and 26 are formed in the recesses of the fixed / movable stands 21 and 22. In FIG. 8, the elevating frame 6 is at a level Lv1 shown in FIG. 6 (b) apart from the carriage 3, and the steps of FIGS. 6 (a) and 7 (d) are omitted. However, this level is not limited to this and is arbitrary.

FIG. 9 is a diagram showing another embodiment of the electrode replacement device according to the present invention. This electrode replacement device 41 includes a wheel 2 that can be pulled out, a carriage 3, a column pipe 4, and a pipe length. It comprises a small lifting frame 42, a set of first electrode receiving arms 43, a set of second electrode receiving arms 44, a ceiling plate 45, a rotary bearing 46, and a plurality of rollers 47.

After replacing the electrode plates 24U and 24B of the fixed stand 22 in the same manner as described with reference to FIGS. 6 and 7, the electrode replacement device 41 is pulled out to the pull-out rail, the old electrode plate is reloaded to the new electrode plate, and the elevating frame is used. It suffices to reverse 42 and the like by 180 ° by the action of the rotary bearing 46 and the roller 47 and push the electrode replacement device 41 again between the stands 21 and 22 to replace the electrode plate of the moving stand 21. The electrode replacement device 41 is lighter in weight and lower in manufacturing cost than the electrode replacement device 1 shown in FIG.

Although the first electrode receiving arm 7 and the second electrode receiving arm 8 are attached to the elevating frame 6 in this embodiment, these arms 7 and 8 are provided as one and one electrode receiving arm is provided. The removal of the old electrode plate and the transportation of the new electrode plate may be carried out. The point is that the structure is such that the electrode receiving arm carries, moves, and aligns the electrodes.

[0025]

[Effect of device]

 As described above, the present invention supports a carriage that is movable in the width direction of a steel strip, and is mounted on the carriage so as to be movable up and down and movable in the traveling direction of the steel strip to support the electrode plate. An electrode replacement device is configured with the electrode receiving arm, and the electrode plate is replaced with this electrode replacement device, so the work efficiency is higher than that in which the electrode plate was directly replaced with a crane. Moreover, it does not require skill and the burden on the operator is greatly reduced.

If the electrode receiving arm is composed of the first electrode receiving arm that supports the old electrode and the second electrode receiving arm that carries the new electrode plate, the working time is further shortened.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electrode replacement device for a steel strip welding device according to the present invention.

FIG. 2 is a front view of an electrode replacement device according to the present invention.

FIG. 3 is a view showing the connection between the column pipe and the lifting frame of the electrode replacement device according to the present invention.

FIG. 4 is a central sectional view of the electrode replacement device of the present invention.

FIG. 5 is an explanatory view of the operation of the steel strip welding device according to the present invention.

FIG. 6 is an explanatory view of the operation of the electrode replacement device of the present invention.

FIG. 7 is an explanatory view of the operation of the electrode replacement device of the present invention.

FIG. 8 is a view showing another method of using the electrode replacement device of the present invention.

FIG. 9 shows another embodiment of the electrode replacement device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electrode replacement device, 2 ... Wheel, 3 ... Truck, 5 ... Frame raising / lowering means, 6 ... Elevating frame, 7 ... Electrode receiving arm (1st electrode receiving arm), 8 ... Electrode receiving arm (2nd electrode receiving arm) , 20 ... Steel strip welding device, 21 ... Moving stand, 22 ... Fixed stand, 23U, 24U ... Upper electrode plate, 23B, 24B ... Lower electrode plate, 27 ... Previous steel strip, 2
7B ... the bottom of the previous steel strip, 28 ... the next steel strip, 28T ... the top of the next steel strip.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Susumu Funabashi No. 3 Hikari, Oshima, Kashima-machi, Kashima-gun, Ibaraki Sumitomo Metal Industries, Ltd. Kashima Steel Works (72) Hozo Ohyama, Otsuko, Oshima, Kashima-machi, Kashima-gun, Ibaraki Prefecture Sumitomo Metal Industries, Ltd. Kashima Steel Works

Claims (2)

[Scope of utility model registration request] 1. An electrode plate replacement device for replacing an electrode plate in a steel strip welding device for welding and joining a bottom of a previous steel strip and a top of a next steel strip, the electrode plate replacement device comprising: A steel strip welding device including a carriage movable in the width direction of a steel strip, and an electrode receiving arm for supporting an electrode plate that is attached to the carriage so as to be able to move up and down and movable in the traveling direction of the steel strip. Electrode replacement device. 2. The electrode receiving arm comprises a first electrode receiving arm for receiving an old electrode plate and a second electrode receiving arm for carrying a new electrode plate, which are mounted on a common lifting frame. The electrode replacement device for a steel strip welding device according to claim 1, wherein