KR20020044251A - Apparatus for adjusting welding bar in welder - Google Patents

Abstract

PURPOSE: An apparatus for adjusting a welding bar in a welder is provided to accurately control a height of the welding bar and promptly cool the welding part. CONSTITUTION: In a welder welding a strip with a torch which is installed on a traveling part moving side to side along traveling rails on the traveling rails that are put on the upper part of the strip so that the traveling rails are ascended or descended, the apparatus for adjusting a welding bar in the welder comprises a welding bar(22) from the side surface of one end of which air supply holes(22a) are laterally formed, on each side surfaces of which back bead grooves(22c) are longitudinally formed, wherein a plurality of ejection holes(22b) connected to the air supply holes(22a) are formed on both sides of the back bead grooves(22c), on one end of which a position determining protrusion(26) is formed, and which is installed at the lower part of the torch; a welding support part in which fixing cylinders(104) are installed inside of a resting groove formed on a base to arrange the welding bar(22) so that the fixing cylinders(104) support the welding bar(22); and a height adjusting part in which an eccentric shaft connected to a motor is fixed to a position separated from the central part of an eccentric plate, a part of the eccentric plate is projectingly arranged onto the resting groove.

Description

Apparatus for adjusting welding bar in welder

The present invention relates to a welder, and more particularly, a welder's well for allowing the welding bar to adjust the position of a welding bead to form a back bead at an opposite welding portion of the torch when welding the rear end of the sun coil and the front end of the after coil. It relates to a ding bar adjusting device.

In general, the welding machine in the rolling process is mainly used in pickling lines for removing scale layers attached to the surface of stainless hot rolled coils and annealing lines for imparting mechanical and physical properties. This is used to weld the end of the sun coil and the end of the after coil.

6 schematically shows the whole of a conventional welding machine.

The traveling section 8 installed on the traveling base 6 mounted on both ends of the base 2 and mounted on the cylinder guide 4 so as to move up and down is moved along the traveling rail 10 from side to side. While the torch 12 is used to weld the rear end of the sun coil and the end of the after coil.

In order to reinforce the rigidity of the joint at this welding operation, a welding bar 14 having a back bead groove is formed on the bottom surface of the joint to form a back bead.

Therefore, when the torch 12 moves from side to side while the rear end of the sun coil and the front end of the after coil are positioned above the back bead groove of the welding bar 14, the back bead is formed on the lower surface of the joining part. will be.

However, if the welding operation as described above is repeated, the spatter of the welding wire is pushed around the welding bar and the formation of the back bead becomes uniform only when the depth of the back bead groove is maintained. Grinding the entire surface is essential.

When the grinding operation is repeatedly performed, the height of the welding bar decreases, and a height adjusting liner is inserted between the welding bar and the base to maintain the height of the welding bar constant.

Since the thickness of the inserted liner is not constant, there is a problem in that it is not easy to adjust the height of the welding bar.

In addition, since the coil is released in the state of not being completely cooled after the end of the welding operation, there is also a problem that the welding part is broken or the surface of various driving rolls is damaged.

In order to solve such problems, an object of the present invention is to provide a welding bar adjusting device of the welding machine to enable precise height adjustment of the welding bar and to quickly cool the welding area.

1 is a perspective view showing the entire welding machine equipped with a welding bar adjusting device according to the present invention.

Figure 2 is a perspective view showing a welding bar adjusting apparatus according to the present invention.

3 is an exploded perspective view showing a welding bar adjusting apparatus according to the present invention.

4 is a cross-sectional view seen from A-A of FIG. 3.

Figure 5 is a perspective view showing the height adjusting portion of the welding bar adjusting apparatus according to the present invention.

6 is a perspective view showing the whole of the conventional welding machine.

<< Explanation of symbols for main part of drawing >>

22.Welding bar 22a ... Air supply hole

22b ... injection hole 22c ... back bead groove

24 Base 40 Height adjustment

42 eccentric 44 eccentric shaft

48 ... motor 52 ... clock

60.Support 62.Transfer Cylinder

64 ... guide block 66 ... support bearing

68 ... Air supply line 70 ... Nipple head

80.Rotator 84 ... Belt

100 ... welding base 102 ... seating groove

104 ... fixed cylinder

In order to achieve the above object, the present invention, in the welding machine for welding the strip with a torch installed on the running portion is moved to the left and right along the running rail on the running rail which is placed on the upper part of the strip, air supply from the side to the longitudinal direction Forming holes, and forming a plurality of injection holes communicating with the air supply hole on both sides of the back bead forming grooves formed in the longitudinal direction on each side, and positioning protrusions are formed at either end of the torch, A welding bar installed below; A welding receiving part for installing a fixing cylinder to support the welding bar inside the seating groove formed in the base to arrange the welding bar; An eccentric shaft connected to the motor is fixed to a position separated from the center of the eccentric plate and a portion of the eccentric plate includes a height adjustment portion protruding to the seating groove.

Here, it is preferable that an eccentric indicator is installed on the motor rotation shaft of the height adjustment unit, and a scale corresponding to the eccentric indicator is formed on the side of the base.

The support block may further include a support bearing having a positioning groove into which the positioning protrusion is inserted, and a support part for installing an air supply pipe corresponding to the air supply hole.

In the above-described configuration, it is preferable to further include a motor connected to the welding bar and the belt.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view showing the entire welding machine equipped with a welding bar adjusting device according to the present invention.

The welder welds the strip to the torch 12 installed in the traveling portion 8 which is moved left and right along the traveling rail 10 on the traveling rail 10 which is placed on the upper and lower portions of the strip S.

Under the torch 12, a welding bar adjusting device according to the present invention is installed as shown in Figs.

The welding bar adjusting device 20 installs the welding bar 22 proposed to meet the object of the present invention on the base 24, and adjusts the height of the welding bar 22 by using the height adjusting part 40. In addition, the air supplied through the support part 60 is configured to be sprayed to the welding part through the welding bar 22, and by rotating the welding bar 22 by using the rotating part 80 formed of a motor and a belt provided with a reducer. It is configured to replace the damaged surface by the welding operation with the unused surface.

Here, the welding bar 22 is formed in a substantially square cross-sectional shape, each corner is chamfered to prevent damage to the corners when the welding bar is rotated.

A positioning protrusion 26 is formed at the center of one end side of the welding bar 22, and is coupled to a supporting part 60, which will be described later, which supports the welding bar 22 when the welding bar 22 rotates.

In addition, at the center of the other end of the welding bar 22, a driven rotary shaft 28 supported by the support 26 is formed, which is driven by the motor 82 and the belt 84 of the rotary unit 80. Connected.

More preferably, in order to precisely control the position of the welding bar 22, the sensing jaw 30 is installed on the other end side of the welding bar 22, and the rotation sensor 32 corresponding to the base 24 is provided. Install on.

One end side of the welding bar 22 is formed with the air supply hole 22a is drawn in the other end in a position adjacent to each corner, the inlet of the air supply hole 22a is tapered.

As shown in FIG. 4, the air supply hole 22a communicates with the injection holes 22b formed in two rows on four surfaces of the welding bar 22 outside, so that the air supplied from the air supply holes 22a is injected into the injection holes 22a. To be sprayed through 22b.

A back bead groove 22c is formed between one end of the welding bar 22 and the other end between the injection holes 22b.

The welding bar 22 configured as described above is installed in the welding support part 100, and the welding support part 100 has a mounting groove 102 in which the welding bar 22 may be seated on the base 24. It is formed across, and the fixed cylinder 104 is built in so as to support the welding bar 22 inside the seating groove (102).

The seating groove 102 is rounded on the inner side to prevent the inner side and the welding bar 22 from colliding during the rotation of the welding bar 22.

The rod end of the fixed cylinder 104 is located on the inner side of the seating groove 102 to hold both sides of the opposite welding bars 22 when the welding bar 22 is to be fixed.

The height adjusting portion 40 is installed in the lower portion of the seating groove 102, as shown in FIG. 5, a plurality of eccentric plates 42 are disposed to protrude from the bottom surface of the seating groove 102, and these pieces The judgment 42 is connected by the eccentric shaft 44, and one end of the eccentric shaft 44 is connected to the motor 48 through the worm gear 46.

Then, a reducer 50 is provided between the eccentric shaft 44 and the motor 48 to reduce the rotational speed of the motor 48.

Since the height of the welding bar 22 is determined according to the extent to which the eccentric plate 42 protrudes from the seating groove 102, the indicator 52 that can confirm the projecting degree of the eccentric plate 42 is required.

To this end, an eccentric indicator 52a is installed at the other end of the eccentric shaft 44, and a scale 52b corresponding to the eccentric indicator 44 is formed on the side of the base 24.

On the other hand, the support 60 is installed on one side of the welding bar 22, the positioning projections 26 of the welding bar 22 is inserted into the guide block 64 which is moved to the left and right by the transfer cylinder 62. The supporting bearing 66 is provided, and the nipple head 70 which communicates with the air supply pipe 68 is protrudingly installed in the adjacent position of the supporting bearing 66.

In particular, the protruding length of the nipple head 70 does not reach the length of the positioning protrusion 26 so that the nipple head 70 does not interfere with one end surface of the welding bar 22 when the welding bar 22 is rotated.

The nipple head 70 is formed in a conical shape with a tip portion so as to correspond to the tapered portion of the air supply hole 22a of the welding bar 22 described above.

In addition, the guide block 64 passes through the guide block 64 with a tie bolt 72 to guide the guide block 64 when the guide block 64 moves to the left and right by the transfer cylinder 62. Bolt).

It is preferable to control the position of the guide block 64. To this end, the sensor bar 74 having about three position sensors is attached to the base 24, and the position sensors are connected to a controller to be described later.

The in sensor 76a located close to the base 24 among the position sensors senses the position of the guide block 64 when the welding bar 22 is fixed, and the out sensor 76b located next is the welding bar 22. The guide block 64 detects a position at the time of rotation, and the replacement position sensor 76c located at the outermost side detects the position of the guide block 64 when the welding bar 22 is replaced.

The control unit 120 is connected to the moving cylinder 62, the fixed cylinder 104, the position sensors 76a, 76b (76c), the rotation sensor 32 and all the motors 48, 62, 82 Operate the connected components, or operate the components corresponding to each task according to the signals input from the sensors.

The welding bar adjusting device according to the present invention configured as described above has the following functions.

Looking at the first step of adjusting the appropriate height of the welding bar 22, while the fixed cylinder 104 is reversed through the control unit 120, while looking at the eccentric indicator 52a installed on the side of the base 24, the motor 48 ) Rotates the eccentric shaft (44).

At this time, if the motor 48 is stopped at the point indicating the lowest position while watching the eccentric indicator 52a, the upper surface of the welding bar 22 is in a state substantially coincident with the upper surface of the base 24.

In this state, welding is performed using the torch 12 while the rear end of the sun coil and the front end of the after coil are positioned in the back bead groove 22c, and the welding is performed while the back bead is formed.

When the air is supplied through the air supply pipe 68 after the welding is completed, the supplied air is injected into the upper portion of the welding bar 22 through the nipple head 70, the air supply hole 22a, and the injection hole 22b. It cools the welding part.

In addition, referring to the action of replacing the unused surface of the welding bar 22, the moving cylinder 62 is operated to move the guide block 64 back to the position of the out sensor 76b.

Then, the nipple head 70 is separated from the air supply hole 22a of the welding bar 22, but the positioning projection 26 does not leave the support bearing 66.

In this state, when the motor 48 is rotated, the welding bar 22 is rotated, and at the moment when both the rotation detection sensors 32 detect the two detection jaws 30, the rotation of the motor 48 is stopped and the well is stopped. The ding bar 22 is also stopped. Accordingly, the welding bar 22 is stopped after being rotated by about 90 °.

Then, the operator checks the height difference between the welding bar 22 and the base 24. In the case of the reuse welding bar 22 through the grinding operation, the height difference is always generated.

At this time, when the motor 48 as shown in FIG. 5 rotates, the eccentric plate 42 connected to the eccentric shaft 44 is raised or lowered, and the operator has the scale 52b and the eccentric indicator formed on the base 24. Looking at 52a, the motor 48 is stopped when the height of the welding bar 22 reaches a desired position.

In addition, the fixed cylinder 48 is operated to completely fix the welding bar 22 so that the end of the rod is in close contact with opposite sides of the welding bar 22.

Subsequently, when the moving cylinder 62 is operated to move the guide block 64 until the in-sensor 76a detects the positioning projection 26 in the support bearing 66, the nipple head 70 is inserted. Is inserted into the air supply hole 22a, and the air can be supplied.

Meanwhile, when the welding bar 22 is replaced, the fixed cylinder 104 is operated while the guide block 64 is fully retracted to the replacement position sensor 76c, so that the rods are in close contact with both sides of the welding bar 22. Retract the tip.

Then, the driven rotating shaft 28 may be removed from the belt 84 and the welding bar 22 may be replaced.

As described above, the welding machine according to the present invention substantially solves the conventional problems.

That is, by adjusting the height of the welding bar by using the eccentric plate rotated by the motor, the height can be adjusted according to the surface state of the welding bar, thereby reducing welding defects and making the formation of the back bead uniform.

In addition, it is possible to prevent the welding site from being broken by cooling the welding area with the air injected through the injection hole of the welding bar after the kind of welding operation, so that the progress of the script is smooth and the surface damage of the various driving rolls can be prevented. Can be.

Claims (4)

In the welding machine for welding the strip with a torch installed on the running portion is moved to the left and right along the running rail on the running rail that is placed on the upper part of the strip, Once the air supply holes are formed in the longitudinal direction from the side surface, a plurality of injection holes are formed on both sides of the back bead forming groove formed in each side in the longitudinal direction, and the plurality of injection holes communicated to the air supply hole, and positioning at either end A protrusion bar is formed and is installed below the torch; A welding receiving part for installing a fixing cylinder to support the welding bar inside the seating groove formed in the base to arrange the welding bar; The welding bar adjusting device of the welding machine, characterized in that the eccentric shaft connected to the motor is fixed to a position separated from the center of the eccentric plate and a portion of the eccentric plate protrudingly disposed in the seating groove. The welding bar adjusting apparatus of claim 1, wherein an eccentric indicator is provided on a motor shaft of the height adjusting part, and a scale corresponding to the eccentric indicator is formed on a side surface of the base. [Claim 2] The method of claim 1, further comprising a support bearing having a positioning groove into which the positioning projection is inserted, and a support portion for installing an air supply pipe corresponding to the air supply hole, in the guide block moved left and right by the moving cylinder. Welding device adjusting device of the welding machine. The welding bar adjusting device of any one of claims 1 to 3, further comprising a motor connected to the welding bar by a belt.