KR20100048308A - A stud pin tube welding machine - Google Patents

Abstract

PURPOSE: An automatic resistance welding machine for a stud pin tube is provided to accurately weld a stud pin in the accurate position of a tube by moving a movable torch to a fixed torch. CONSTITUTION: An automatic resistance welding machine for a stud pin tube is composed of first and second welding torches(11,12), a stud pin holding unit, a stud pin supply unit(30), an angular rotation drive unit(40), and a stopper unit(50). The first and second welding torches are installed in both sides of a tube(13), respectively. The stud pin holding unit holds stud pins(10) inserted into the front ends of the first and second welding torches. The stud pin supply unit supplies the stud pins one by one. The angular rotation drive unit rotates the first and second welding torches toward the stud pin supply unit.

Description

Automatic stud pin tube welding machine {A stud pin tube welding machine}

The present invention relates to a stud pin tube automatic resistance welding device, and more particularly, in a stud pin tube resistance welding device for welding the stud pin to the outer diameter surface of the tube along the circumference and longitudinal direction, the stud pin of the welding torch The present invention relates to an automatic resistance welding apparatus for stud pin tubes, in which a supply is made accurately, a welding torch is firmly held by a welding torch, and a structure capable of improving the durability of the welding torch is improved.

In general, a heat exchange tube used in a marine boiler has a structure in which a plurality of stud pins are welded along the circumference and the longitudinal direction of the tube to increase the heat transfer area on the outer surface of the tube.

In this way, when a plurality of stud fins are welded to the outer diameter surface of the tube, the heat transfer area is increased and the heat transfer efficiency is increased by the pins welded to the outer diameter surface of the tube. You get steam.

The method of welding the stud fins to the heat exchange tube includes cutting the tube and cleaning the tube surface, transferring the wiped tube with a constant pitch between the welding torches of the stud fin tube auto welder, and the welding. The pin is continuously supplied to the torch and the welding is performed by an arc generated at the same time as the pin supplied to the welding torch is brought into close contact with the outer diameter surface of the stopped tube after being fed at a constant pitch.

That is, in the state where a plurality of fins are contacted at predetermined intervals along the outer circumferential surface of the tube, arcs are generated at the contact portions of the tubes and the fins, and the contact portions of the tubes and the fins are welded by arc heat generated by pressurization.

However, the conventional stud fin tube welding apparatus performing the step of welding the stud pin to the tube as described above has the following problems.

First, there is a problem in the accuracy and speed of supplying the stud pin to the welding torch continuously, workability and productivity is low.

That is, as a predetermined cylinder pushes the stud pins toward the welding torch and supplies them one by one, there is a problem in that the working speed and productivity of the cylinder are lowered and the supply speed of the stud pins is lowered.

Secondly, because the welding torch supplied with the stud pin and welding cannot hold the stud pin firmly during welding due to its structural problem, the stud pin is often shaken when the stud pin exerts force on the tube. , There is a problem that the welding position of the stud pin to the tube is uneven.

Third, the welding torch of the welding torch is repeated more than thousands of times as a plurality of pins are welded to the tube, causing severe wear of the welding torch. There is a problem that the cost of repair and replacement will be high.

The present invention has been made in view of the above problems, in the stud pin tube welding apparatus for welding the stud pin to the outer diameter surface of the tube along the circumference and longitudinal direction, to ensure that the supply of the stud pin in the welding torch accurately The purpose of the present invention is to provide a stud pin tube automatic resistance welding device that firmly holds a stud pin during welding and mounts a round electrode in the welding torch to improve the durability life.

In the present invention for achieving the above object is a stud pin tube automatic resistance welding device comprising a drive device for feeding the pitch to the tube at a constant pitch to the position where the stud pin is welded to the outer surface of the tube, the stud pin is A first welding torch and a second welding torch spaced apart on both sides of the tube transferred at a constant pitch to the welded position; Stud pin holding means for holding a stud pin inserted into the first welding torch and the second welding torch; Stud pin supply means disposed at predetermined positions above the first welding torch and the second welding torch and drop-feeding the stud pins one by one in the first welding torch and the second welding torch; Angular rotation driving means for rotating the first welding torch and the second welding torch toward the stud pin supply means to receive the welding position or the stud pin; The first welding torch and the second welding torch of the first welding torch and the second welding torch when the welding position is in the welding position to block the stud pin falling from the stud pin supply means and rotates toward the stud pin supply means. It provides a stud pin tube automatic resistance welding device comprising a; stopper means to be folded outward by the pressing force to drop the stud pin.

In the present invention, the stud pin holding means is configured to be separated into a fixed torch mounted in the fixed state and the mobile torch hinged to the fixed torch to be fixed in the first and second welding torch, the mobile torch fixed torch It is characterized in that by connecting the air cylinder to the moving torch to push or pull toward.

In the present invention, the stud pin supply means includes a case of a predetermined volume; A vibration device mounted to the bottom of the case; A vibration storing plate mounted on an upper side of the case; A spiral path formed along the circumferential direction of the vacuum storage plate; A stud pin outlet formed at an end of the spiral path of the vibration storage plate so that a plurality of stud pins stacked on the vibration storage plate can be discharged; A flexible pipe to which the stud pin outlet is connected; And a discharge pipe mounted at the lower end of the flexible pipe to be the final outlet of the stud pin.

In the present invention, the stopper means is formed at the outlet of the discharge pipe by the contact pressing force of the first welding torch and the second welding torch when the first welding torch and the second welding torch rotate each to the outlet of the discharge pipe. A self-rotating body that rotates in an outward direction and rotates by the weight to the outlet of the discharge pipe of the stud pin supply means when the first welding torch and the second welding torch return to the welding position; Hinge means for fixing the lower end of the self-rotating body to be rotated at an angle; And a blocking plate integrally formed at an upper end of the self-weight rotating body to block an outlet of the discharge pipe.

In the present invention, the angular rotation drive means and the rotation shaft connected to the rear end of the first welding torch and the second welding torch; And an air rotary actuator connected to the rotary shaft to rotate each of the rotary shafts.

In addition, the present invention is characterized in that the clamp and the rod-shaped electrode for holding the stud pin to the groove formed on the inner surface of the first welding torch and the second welding torch are detachably assembled.

The present invention provides the following effects through the problem solving means described above.

First, in the stud pin tube welding apparatus for welding the stud pin along the circumference and length direction of the outer diameter surface of the tube, the stud pin is fed into the front end of each welding torch from the stud pin feeder, The supply of the stud pins to can be made accurately.

Secondly, the welding torch is separated into the fixed torch and the mobile torch and the air cylinder allows the mobile torch to move to the fixed torch, so that the stud pin is firmly snapped between the fixed torch and the mobile torch during welding, so that the stud pin is in position in the tube. It can be welded accurately without shedding.

Third, by attaching a separate rod-shaped electrode and a clamp to hold the stud pin by forming a groove in the welding torch, only the round-rod electrode inside the clamp can be replaced when worn, thereby improving the durability of the welding torch.

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

1 is a perspective view showing a main part of the stud fin tube automatic resistance welding apparatus according to the present invention, Figure 2 is a plan view showing the main portion of the stud fin tube automatic resistance welding apparatus according to the present invention, Figures 4 to 7 A perspective view illustrating the operation of the stud fin tube automatic resistance welding apparatus according to the present invention.

The stud pin tube automatic resistance welding device according to the present invention is a device for welding the stud pin at equal intervals along the circumferential direction and the longitudinal direction on the outer diameter surface of the pitch-transferred tube at regular intervals, the stud pin ( 10 is a pitch feed driving device (not shown) for advancing and rotating the tube 13 at a constant pitch to a position where the welding is performed, and spaced apart on both sides of the tube 13 to stud pins on the tube 13. The first welding torch 11 and the second welding torch 12 for welding 10, and the stud pin 10 is inserted into the front end of the first welding torch 11 and the second welding torch 12. The stud pin holding means 20 for holding the first and second welding torchs 12 and the first welding torch 11 and the second welding torch 12 at a predetermined position. The stud pin supply means 30 which drops-feeds one by one in the part, and the said 1st welding torch 11 and the 2nd welding torch 12 are melted. The stud pin supply when the rotary drive means 40 and the first welding torch 11 and the second welding torch 12 are rotated to the respective positions or to the stud pin supply stage 30, respectively. And a stopper means 50 for blocking the stud pins 10 falling from the means 30.

As shown in FIG. 8, grooves 14 are formed on the inner surfaces of the first welding torch 11 and the second welding torch 12 to form a semicircular shape in each of the grooves 14. 15) and the round electrode 15 are detachably assembled with bolts.

That is, the semi-circular clamp 15 is assembled to the groove 14 by bolts, and the high-strength enclosed round electrode 18 is inserted and fixed together in the clamp 15, so that the stud pin 10 is welded. ) Is supported by the pressing force when it is pressed against the tube.

Accordingly, by replacing only the round bar electrode 18 inserted into the clamp 15 to replace the welding torch itself due to wear and tear, the durability of the welding torch can be improved, and maintenance costs can be improved. You can save a lot.

Here, look at the configuration of the stud pin supply means 30 as follows.

The case 31 of a predetermined volume of the stud pin supply means 30 is supported by a predetermined frame and fixedly installed on the upper side of the welder.

A vibration device (not shown) is mounted to a bottom of the case 31, and a vibration storage plate 32 that receives the vibration force of the vibration device is mounted to an upper side of the case 31.

At this time, the spiral path 34 is formed in the vacuum storage plate 32 along its circumferential direction, and a stud pin outlet 35 is formed at the end of the spiral path 34 at the outer peripheral position of the vacuum storage plate 32. Is formed.

In addition, an upper end of the flexible pipe 36 is connected to the stud pin outlet 35, and an exhaust pipe 37, which is the final outlet of the stud pin 10, is integrally connected to the lower end of the flexible pipe 36. .

Here, look at the configuration of the stopper means 50 as follows.

The stopper means 50 is a self-rotating body 52 having a round bar or a long bolt shape, and hinge means (not shown) coupled to the lower end of the self-rotating body 52 so that the self-rotating body 52 is angularly rotated. ) And a blocking plate 56 formed integrally with the upper end of the self-rotating body 52 to block the stud pin 10 discharged to the discharge pipe 37.

The self-weight rotating body 52 is the first welding torch 11 and the second welding torch 12 in a horizontal position (welding position) when the angular rotation toward the outlet of the discharge pipe 37, the vertical The first welding torch 11 and the second welding are rotated outwardly from the outlet of the discharge pipe 37 by the contact pressing force of the first welding torch 11 and the second welding torch 12. When the torch 12 returns to the welding position, the torch 12 rotates by its own weight to the outlet of the discharge pipe 37, and the blocking plate 56 also rotates together.

Therefore, when the self-rotating body 52 rotates in an outward direction from the outlet of the discharge pipe 37, the blocking plate 56 of the self-rotating body 52 is separated from the outlet of the discharge pipe 37 to stud The pin 10 is dropped and discharged, while the blocking plate 56 of the self-rotating body 52 is discharged when the self-rotating body 52 rotates angularly by its own weight toward the outlet of the discharge pipe 37 again. The outlet of the pipe 37 is blocked to block the drop discharge of the stud pin 10.

Here, the configuration of the stud pin holding means 20 is as follows.

The stud pin holding means 20 is a fixed torch 16, which is mounted in a fixed state to the first welding torch 11 and the second welding torch 12, and the rotation to the fixed torch 16, respectively. The hinge is fastened to the mobile torch 17 is configured to be separated, the torch 17 is connected to the air cylinder 22.

Therefore, when the stud pin 10 is inserted between the fixed torch 16 and the mobile torch 17, the mobile torch 17 is pushed toward the fixed torch 16 by driving the air cylinder 22. Thus, the stud pin 10 inserted between the fixed torch 16 and the mobile torch 17 is firmly fixed even when welding to the tube 13 can provide the accuracy of the welding position without shaking.

Of course, when the welding of the stud pin 10 to the tube 13 is completed, the air cylinder 22 is driven back to pull the moving torch 17 from the fixed torch 16, the stud pin ( 10) can be easily separated.

Here, looking at the configuration of the angular rotation drive means 40 as follows.

The angular rotation drive means 40 is the welding position (horizontal arrangement) of the first welding torch 11 and the second welding torch 12 or the outlet position of the discharge pipe 37 for receiving the stud pins (vertical) Arranged in such a manner that the rotational shaft 42 is connected to the rear ends of the first welding torch 11 and the second welding torch 12, and the rotational shaft 42 can be provided with a rotational force. It consists of an air rotary actuator 44 to be connected.

Accordingly, the rotary shaft 42 is rotated by the driving of the air rotary actuator 44, and the first welding torch 11 and the second welding torch 12 connected to the rotary shaft 42 are welded to each other. (Horizontally arranged state) or to the exit position (vertically arranged state) of the discharge pipe 37 for receiving the stud pins.

Hereinafter, the operation of the stud pin tube automatic welding device of the present invention having the above configuration will be described in order.

According to the present invention, the tube-shaped tube 13 is transferred to a fixed pitch to a position where the stud pin 10 is welded by a pitch feed driving device (not shown), and then stopped. As the operation of welding the stud pin 10 to the outer diameter surface is repeated, the stud pin tube automatic welding for welding the stud pin 10 at equal intervals along the circumferential direction and the longitudinal direction to the outer diameter surface of the tube 13. It is intended to provide a device.

As a preceding step for this operation, the stud pin supply by the stud pin supply means 30 is made, a plurality of stud pins 10 stacked on the vibration storage plate 32 as shown in FIG. While receiving a continuous vibration of the vibration device (not shown) is aligned in a row toward the stud pin outlet 35 while moving toward the outer peripheral portion of the spiral path 34 of the vibration storage plate (32).

Subsequently, the stud pins 10 arranged in a line toward the stud pin outlet 35 are transferred to the flexible pipe 36 one by one through the stud pin outlet 35.

At the same time, the stud pin 10 introduced into the flexible pipe 36 is free to fall to the discharge pipe 37 which becomes the final outlet of the stud pin 10.

At this time, since the blocking plate 56 integrally formed on the upper end of the self-rotating body 52 of the stopper means 50 is blocking the outlet of the discharge pipe 37, as indicated by a dotted line in FIG. Likewise, the drop discharge of the stud pin 10 is blocked once.

Next, as shown in FIG. 5, the stud pin 10 may be easily inserted between the fixed torch 16 and the moving torch 17 of the first and second welding torches 11 and 12. The moving torch 17 is pulled from the fixed torch 16 and spaced apart by the driving of the air cylinder 22.

Next, as shown in FIG. 6, the rotary shaft 42 rotates by the driving of the air rotary actuator 44, and the first welding torch 11 and the second welding torch 12 are rotated. Is rotated to the outlet position (vertically aligned state) of the discharge pipe 37 for receiving the stud pin from the welding position (horizontally arranged state).

At the same time, the front end portions of the first welding torch 11 and the second welding torch 12 push the blocking plate 56 integrated with the upper end of the self-rotating body 52 outward.

Accordingly, the self-rotating body 52 is rotated in the outward direction at the outlet of the discharge pipe 37, the blocking plate 56 is separated from the outlet of the discharge pipe 37 to stud pin 10 This drop is discharged and is eventually inserted between the rod-shaped electrodes 15 of the first welding torch 11 and the second welding torch 12.

Subsequently, as shown in FIG. 7, the first welding torch 11 and the second welding torch 12 are returned to the welding position by driving the air rotary actuator 44, and at the same time, the self-weight The rotating body 52 rotates to the outlet of the discharge pipe 37 by its own weight again, and the blocking plate 56 again blocks the outlet of the discharge pipe 37 so that the discharge of the stud pin 10 is discharged. Will block.

Next, the air cylinder 22 is driven by the stud pin 10 inserted between the fixed torches 16 and the moving torches 17 of the first and second welding torches 11 and 12. The mobile torch 17 is pushed toward the fixed torch 16 to tighten the stud pin 10, and the stud pin 10 inserted between the fixed torch 16 and the mobile torch 17 is firmly fixed. As a result, welding of the stud pin 10 to the tube 13 can be made accurately.

By repeating such an operation, the stud pin 10 can be easily welded to the outer diameter surface of the tube 13 along the circumferential direction and the longitudinal direction at equal intervals.

Figure 1 is a perspective view of the main part showing the stud fin tube automatic resistance welding apparatus according to the present invention.

Figure 2 is a plan view showing the main portion of the stud fin tube automatic resistance welding apparatus according to the present invention.

Figure 3 is a plan view showing the stud pin supply means of the stud pin tube automatic resistance welding apparatus according to the present invention.

4 to 7 is a view for explaining the operation of the stud pin tube automatic resistance welding apparatus according to the present invention, Figure 4 is a stud pin supply standby state, Figure 5 is a movement of the torch welding torch in a horizontal state 6 is a perspective view showing a vertical movement of the welding torch to receive the stud pins, and FIG. 7 shows the welding torch being returned to the horizontal state for welding.

8 is a perspective view illustrating that the round bar electrode is detachably assembled to the first and second welding torches of the stud pin tube automatic resistance welding apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10 stud pin 11: first welding torch

12: second welding torch 13: tube

14 groove 15 clamp

16: fixed torch 17: moving torch

18: round bar electrode 20: stud pin holding means

22: air cylinder 30: stud pin supply means

31 case 32 vibration plate

35 stud pin outlet 36 flexible pipe

37: discharge pipe 40: angular rotation drive means

42: rotation axis 44: air rotary actuator

50: stopper means 52: self-weight rotating body

54 hinge means 56 blocking plate

Claims (6)

In the stud fin tube automatic resistance welding device comprising a pitch feed drive for supplying the tube at a constant pitch to the position where the stud pin is welded to the outer diameter surface of the tube, A first welding torch 11 and a second welding torch 12 spaced apart from both sides of the tube 13 transferred at a constant pitch to a position where the stud pin 10 is welded; Stud pin holding means (20) for holding the stud pin (10) inserted into the front end portions of the first welding torch (11) and the second welding torch (12); Studs disposed at predetermined positions above the first welding torch 11 and the second welding torch 12 to drop and supply the stud pins 10 one by one in the first welding torch 11 and the second welding torch 12. Pin supply means 30; Angular rotation driving means (40) for rotating the first welding torch (11) and the second welding torch (12) toward the stud pin supply means (30) to receive a welding position or a stud pin; When the first welding torch 11 and the second welding torch 12 is in the welding position, the stud pin supply 10 falling from the stud pin supply means 30 is blocked, and the stud pin supply means 30 And a stopper means (50) which is turned outward by the pressing force of the first welding torch (11) and the second welding torch (12) rotating toward the side so that the stud pin (10) falls. Automatic resistance welding device for stud pin tubes. The method according to claim 1, characterized in that the clamp 15 and the round bar electrode 15 is detachably assembled to the groove portion 14 formed on the inner surface of the first welding torch 11 and the second welding torch 12. Automatic resistance welding device for stud pin tubes. The method according to claim 1, The stud pin holding means 20, It consists of a fixed torch 16 for mounting the first and second welding torch (11, 12) in a fixed state, and a moving torch (17) hinged to each of the fixed torch 16 to be rotatable. Stud pin tube automatic resistance welding device, characterized in that by connecting the air cylinder 22 to the moving torch 17 to push or pull the moving torch (17) toward the fixed torch (16). The method according to claim 1, The stud pin supply means 30, A case 31 of a predetermined volume; A vibration device mounted to a bottom of the case 31; A vibration storing plate 32 mounted on an upper side of the case 31; A spiral path 34 formed along the circumferential direction of the vacuum storage plate 32; A stud pin outlet 35 formed at an end of the spiral path 34 of the vibration storage plate 32 so that a plurality of stud pins 10 stacked on the vibration storage plate 32 are discharged; A flexible pipe 36 to which the stud pin outlet 35 is connected; Stud fin tube automatic resistance welding device, characterized in that consisting of ;; discharge pipe (37) is mounted to the lower end of the flexible pipe (36) is the final outlet of the stud pin (10). The method according to claim 1 or 4, wherein the stopper means 50, When the first welding torch 11 and the second welding torch 12 rotates toward the outlet of the discharge pipe 37, the contact force of the first welding torch 11 and the second welding torch 12 By the angular rotation in the outward direction of the discharge pipe 37, the discharge pipe of the stud pin supply means when the first welding torch 11 and the second welding torch 12 is returned to the welding position ( A self-rotating body 52 each rotating by its own weight up to the exit of 37); Hinge means (54) for fixing the lower end of the self-rotating body (52) to be rotatable; Stud pin tube automatic resistance welding device, characterized in that consisting of; block plate 56 is formed integrally with the upper end of the self-rotating body 52 to block the outlet of the discharge pipe (37). The method of claim 1, wherein the angular rotation drive means 40, A rotating shaft 42 connected to rear ends of the first welding torch 11 and the second welding torch 12; Stud pin tube automatic resistance welding device, characterized in that consisting of; air rotary actuator (44) connected to the rotary shaft (42) to rotate the rotary shaft (42).

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