JPH0825045A - Nozzle cleaner for arc welding - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] To provide a nozzle cleaner for arc welding that can easily remove spatter that has thickly adhered to the entire inner surface of the welding nozzle and the tip surface. [Structure] Cleaner body 1 and cleaner body drive mechanism 2
Composed of and. The cleaner body has a ring-shaped first rotary cleaner head 6 for removing the adhered spatter on the tip of the nozzle, and a radial direction for removing the adhered spatter on the inner surface of the nozzle that is vertically inserted into the central hole of the cleaner head. The second rotary cleaner head 8 is composed of an expandable / contractible cylindrical brush member 8a. The drive mechanism is composed of a motor 11 for rotating both heads, a cylinder 20 for moving up and down the second rotary head, and an up-and-down transmission member 10 thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arc welding nozzle cleaner for removing spatter adhering to an arc welding nozzle.

[0002]

2. Description of the Related Art In gas shielded arc welding, spatter S generated during welding scatters and adheres to the entire inner surface and tip surface of the torch nozzle. If left unattended, the adhered spatter is deposited. As shown in FIG. 14, turbulence occurs in the gas flow, which causes the air to be involved. As a result, nitrogen becomes bubbles and appears as pores (blowholes) H inside the welded portion as shown in FIG. 15, causing a problem in welding strength. In order to solve these problems, various methods and devices such as brushes, blades, air blow, shot blasting, ultrasonic waves in liquid, pickling, electromagnetic repulsion and magnetic attraction have been conventionally provided. There are merits and demerits, and a means capable of adapting to various nozzle shapes and capable of treating the entire surface of the sputter adhesion portion has not yet been developed.

[0003]

However, the above-mentioned conventional nozzle cleaner has the following problems. * Although spatter near the tip of the nozzle and the inner surface of the inlet can be removed, it cannot be removed if the spatter adheres to the tip of the nozzle thickly. * Spatter near the orifice in the inner part of the nozzle cannot be removed. * If the nozzle shape is a tapered type, it is more difficult to remove spatter. * It is difficult for one type of tool to handle nozzles with different dimensional lengths. * Nozzle is often damaged during nozzle cleaning, resulting in a short nozzle life. * The cleaning processing time is long and the work efficiency is low.

The present invention was researched and developed with the object of solving the above-mentioned problems, and it is possible to easily remove the spatter that is thickly adhered to the entire inner surface of the welding nozzle and the tip end surface, and the tapered taper is provided. An object of the present invention is to provide an arc welding nozzle cleaner that can easily and reliably remove spatter even on the entire inner surface of a nozzle.

[0005]

As a means for solving the above problems and achieving the object, the present invention is a nozzle cleaner for arc welding which comprises a cleaner body and a drive mechanism for the cleaner body. The cleaner body includes a ring-shaped first rotary cleaner head for removing the spatter deposited on the tip of the nozzle, and a spatter deposited on the inner surface of the nozzle that is vertically inserted into the central hole of the first rotary cleaner head. And a second rotary cleaner head composed of a cylindrical brush member capable of expanding and contracting in the radial direction for removing the above. The drive mechanism of the cleaner main body is provided with both the first and second rotary cleaner heads. From a motor for rotating, other rotation transmitting members, a cylinder for raising and lowering the second rotary cleaner head, and other raising and lowering transmitting members. There is provided a made are and nozzle cleaner for arc welding being driven controllably constituted by an appropriate control mechanism.

Further, according to the present invention, in the arc welding nozzle cleaner configured as described above, the first and second rotary cleaner heads are configured to be detachable from the cleaner device, And a nozzle cleaner for arc welding in which the first and second rotary cleaner heads are made of a brush member made of an appropriate material, and a metal, a synthetic resin of a non-brush member in which the first rotary cleaner head has an uneven portion on its upper surface. The present invention provides nozzle cleaners for arc welding each made of a non-ferrous metal member.

[0007]

When the proximity sensor detects the descending passage of the torch nozzle of the robot (not shown) that has been taught beforehand (A in FIG. 8) and sends a signal to the timer, the dual sensor is activated after the preset time has elapsed. First and second consisting of structure
The rotary cleaner head of 1 rotates via a motor and other rotation transmission members.

When the tip of the nozzle reaches the upper surface of the rotating first rotary cleaner head as shown in FIGS. 8 (B), 8 (C) and FIG. If the spatter is thick, although not shown, the ring-shaped solid matter can be removed cleanly as it is.

As described above, at the same time when the tip of the nozzle reaches the upper surface of the first rotary cleaner head, the second rotary cleaner head is rotating during rotation as shown in FIGS. 8D and 10 by the function of the timer. While rotating, it rises in the nozzle via the cylinder and other lifting transmission members,
The spatter adhering to the inner surface of the nozzle is removed by the time the tip reaches the orifice in the nozzle. While the inner surface of the nozzle is rising, the brush member of this second rotary cleaner head expands due to the action of the rotating centrifugal force and slides on the entire inner surface of the nozzle with a fine vibration action, so that a strong hammer effect is obtained. Generates and completely removes spatter.

Next, while the second rotary cleaner head that has entered the inside of the nozzle moves up to the orifice portion and is still rotating, the nozzle slowly moves up as shown in FIG. 8 (E). During the ascent, the inner surface of the nozzle is again subjected to the cleaning action by the second rotary cleaner head.

When the nozzle rises and separates from the first and second rotary cleaner heads, at that moment, the second rotary cleaner head vigorously expands as shown in FIG. The tip is cleaned again, and after the time set by the timer elapses, the second rotary cleaner head returns to its original position through the cylinder and other lifting transmission members, and the first and second rotary cleaner heads rotate. However, the brush member of the second rotary cleaner head, which is expanded by the centrifugal force, is held at the center hole of the first rotary cleaner head so that the initially set diameter is maintained. There is.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The welding nozzle cleaner of this embodiment is roughly classified into a cleaner body 1, a drive mechanism 2 of the body 1, and The drive mechanism 2 includes a control mechanism 3 and a casing 4.

Thus, in this embodiment, the cleaner body 1 is formed by tightly concentrating the short metal brush members 6a fitted in the ring-shaped perforated holder 5 in a ring shape.
It is composed of a ring-shaped first rotary cleaner head 6 having a central hole 6b, and a long-sized metal brush member 8a which is cylindrically arranged and fitted to a holder 7 having a small diameter and a fixing shaft 7a protruding from the bottom. The second rotary cleaner head 8 has a cylindrical second rotary cleaner head 8. The second rotary cleaner head 8 is inserted into the central hole 6b of the first rotary cleaner head 6, and the second rotary cleaner head 8 is attached according to a mounting mode described later. The upper end of the first rotary cleaner head 6 is slightly projected from the upper end of the first rotary cleaner head 6.

The drive mechanism 2 of the cleaner body 1
Is composed of the rotation transmission member 9 of the first and second rotary cleaner heads 6 and 8 and the elevation transmission member 10 of the second rotary cleaner head 8. The rotation transmission member 9 rotates the motor 11. A coupling 14 fitted to the shaft 12 via a key member 13, and an outward flange 15a, bearings 15b and 15b, a bearing case 15c, and an inward direction in which a lower end is fitted to an upper end of the coupling 14. It is composed of a sleeve 15 as a slide bearing having a flange 15d and a key groove 15e. The rotation transmitting member 9 is formed on the upper surface of the top plate of the casing 4 as shown in FIG. The portion is fixedly installed inside the casing 4, and the cleaner body 1 is inserted into the sleeve 15 so that the cleaner body 1 is placed on the upper surface of the inward flange 15d of the sleeve 15. A rotation cleaner head 6 is placed,
Both members are detachably fixed integrally with a screw 16, and the fixing shaft 7a at the lower end portion of the second rotary cleaner head 8 of the cleaner body 1 and the coupling 14 are screw 1.
7, the coupling key 14a and the key groove 15e are engaged with each other while being detachably fixed integrally.

The elevating and lowering transmission member 10 of the second rotary cleaner head 8 is disposed on the guide shaft 18, the bracket 19 of the motor 11 fitted to the guide shaft 18 so as to be elevatably movable, and below the bracket 19. , And an air cylinder 20 that receives the lower surface of the bracket 19 at the tip of the cylinder rod 20a.

Further, the control mechanism 3 of the drive mechanism 2 is
As schematically shown in FIG. 1, in this embodiment, first and second timers 21 and 22, a relay 23 and a regulator 2 are provided.
4, a fuse 25, a plug 26, a solenoid valve 27, a proximity sensor 29 attached to a stay 28, and the like. These elements are appropriately connected and connected to each other. (Not shown), they are configured to perform related operations.

As shown in FIG. 1, the casing 4 is divided into two chambers by a partition wall 4a in this embodiment, and the drive mechanism 2 is installed in one chamber. And the upper part of the cleaner body 1, that is,
The whole of the first rotary cleaner head 6 and the upper part of the second rotary cleaner head 8 are installed in a state of protruding from the top plate, and the main element of the control mechanism 3 is installed in the other chamber, and The proximity sensor 29 is connected to the first and second rotary cleaner heads 6 via the stay 28.
It is arranged near one side of the upper part of 8.

In FIG. 1, 30 is a casing 4
Sliding surface 3 for removal spatter installed in one chamber
0a is a dust-proof cover, 31 is a discharge spatter discharge port formed at one corner of the bottom of the casing 4, 32 is a buffer member fitted in the guide shaft 18, and 33 is an elevating stroke adjusting member of the air cylinder rod. There is.

Next, the cleaning operation will be described based on the embodiment configured as described above. The nozzle N is moved according to the operation of a welding robot (not shown) which has been taught (learned) in advance, and as shown in FIG.
When the sensor 29 is within 15 mm in front of the proximity sensor 29 and is moved down through the center position of the sensor, the sensor 29 detects that the nozzle N has passed and sends a signal to the first or second timer 21 or 22. To do.

As shown in FIG. 8B, the nozzle N descends until its tip touches the upper surface of the first rotary cleaner head 6, and the relay 23 operates upon receiving the transmission, and the motor 11 is supplied with a current. When the motor 11 starts to rotate due to the flow of water, the cleaner body 1, that is, the first and second rotary cleaner heads 6 and 8 rotate together as shown in FIG. 8C.

The rotation of the first rotary cleaner head 6 removes the thick spatter adhering to the tip of the nozzle N which has stopped descending, and the tip of the nozzle N together with the rotation of the second rotary cleaner head 8. The inner and outer surfaces of the are cleaned.

Next, the first command is issued from the relay 23.
Alternatively, the second timer 21 or 22 is activated to activate the solenoid valve 27.
When a command is sent to the air cylinder 20 and air is supplied to the air cylinder 20, the cylinder rod 20a is lifted by thrust, the motor bracket 19 is lifted by using the guide shaft 18 as a guide member, and the second rotary cleaner 8 is rotating together with the motor 11. Are raised in the nozzle N as shown in FIG. (At this time, since the sleeve 15 as the bearing does not rise, the first rotary cleaner head 6 fixed to the upper portion of the sleeve 15 does not rise).

As the second rotary cleaner head 8 is rotated up in the nozzle N to the orifice portion, the nozzle N
The spatter adhering to the inner surface of the nozzle is removed over the entire inner surface of the nozzle. The second rotating cleaner head 8 expands the metal brush member 8a by the action of the rotating centrifugal force while the inner surface of the nozzle is rising and the nozzle N Since it slidably contacts the entire inner surface of the plate with a fine vibration action, a strong hammer effect is generated to completely remove spatter.

Second raised to the orifice of nozzle N
The rotary cleaner head 8 has a first or second timer 2
The rising position is maintained until the end of the set time of 1 or 22, and then the nozzle N slowly rises as shown in (E) of FIG. 8, but during that time, the second rotary cleaner head 8 is rotated. Since the minute vibration action due to the centrifugal force is maintained, the inner surface of the nozzle N is cleaned again, and the effect of removing spatter is further improved.

At the moment when the nozzle N rises and separates from the second rotary cleaner head 8, the metal brush member 8a of the second rotary cleaner head 8 is in contact with the inner surface of the nozzle N and the expansion due to the centrifugal force is suppressed. However, as shown in (F) of FIG. 8, the tip portion of the nozzle N rubs against the tip portion of the nozzle N so that the tip portion of the nozzle is cleaned again. Therefore, when the amount of spatter adhering to the tip of the nozzle N is small, it is not necessary to actively clean the first rotary cleaner head 6 by rotation, and therefore the fixing screw 16 of the first rotary cleaner head 6 is required.
May be loosened and removed from the sleeve 15, and spatters may be removed only by the second rotary cleaner head 8.

When one cycle of the nozzle cleaning work is completed, the nozzle N returns to the original position as shown in FIG. 8G, and the arc welding work is performed again by the welding robot. .

It should be noted that (A), (B), (C) of FIG.
(D), (E) and (F) show modified examples of the first rotary cleaner head 6, and (A) to (C) are constituted by brush members 6a of various materials including a metal brush member. Cleaner heads (D) to (F) have an uneven upper surface 6c made of a metal and a hard synthetic resin on the upper surface of the non-brush member 6c,
The cleaner head is composed of 6d and 6e.

Further, (A), (B) of FIG.
(C), (D), and (E) show modified examples of the second rotary cleaner head 8, and in each case, the metal brush members 8a are configured by bundling in a cylindrical shape. The cross-sectional shape of the member 8a may be various shapes including a circular shape, a rectangular shape, and a linear shape, and a specially processed one may be used if necessary.

The main embodiments of the present invention have been described above, but the present invention is not limited to these embodiments, and the objects of the invention can be achieved and the scope of the invention is not deviated. Various design changes are possible.

[0030]

The present invention is a nozzle cleaner for arc welding comprising a cleaner body and a drive mechanism for the cleaner body, wherein the cleaner body is a ring for removing the spatter adhered to the tip of the nozzle. First of the shape
A second rotary cleaner head comprising a rotary cleaner head and a cylindrical brush member that is vertically inserted into a central hole of the first rotary cleaner head and is capable of expanding and contracting in a radial direction to remove adhered spatter on the inner surface of the nozzle. And the drive mechanism of the cleaner body is composed of the first,
A motor for rotating both the second rotary cleaner heads, other rotation transmission members, a cylinder for raising and lowering the second rotary cleaner heads, and other elevation transmission members, which can be drive-controlled by an appropriate control mechanism. Since the present invention relates to the arc cleaner nozzle cleaner, the following excellent effects are obtained.

The first of the dual structure having different operations and structures,
The second rotary cleaner can reliably remove spatter adhering to the tip and inner surface of the nozzle. Not only straight nozzles but also tapered nozzles, the inner surface of the nozzle and the periphery of the orifice and the nozzle tip The stubborn and thick spatter attached to the part can be removed reliably and efficiently without damaging the nozzle in a short time.

Since the rising stroke of the second rotary cleaner head can be arbitrarily adjusted, the cleaning operation can be reliably and easily achieved even when the dimension length of the nozzle is different.
In the case of using the welding robot, these facts can significantly improve the operating efficiency and welding quality of the welding robot, prevent the nozzle from being damaged, and extend the nozzle life.

By constructing the cleaner body so that it can be attached to and detached from the motor shaft, the cleaner body can be appropriately replaced and replaced even when the diameter of the nozzle is different, so that one cleaner can be easily handled. Therefore, a wide range of nozzle cleaning can be performed.

[Brief description of drawings]

FIG. 1 is a front view of a part of the overall structure of the present invention with a part omitted.

FIG. 2 is a front elevational view of a part of an enlarged main part.

FIG. 3 is an exploded perspective view of a main part.

FIG. 4 is an explanatory view of a detachable state of a first rotary cleaner head with respect to a sleeve as a slide bearing.

FIG. 5 is an explanatory view of a fixed state of a first rotary cleaner head with respect to a sleeve as a slide bearing.

FIG. 6 is an enlarged perspective view of a double combination structure of first and second rotary cleaner heads.

FIG. 7 is an explanatory diagram of a state where the second rotary cleaner head is lifted from the state of FIG.

8A to 8H are explanatory views sequentially showing a nozzle cleaning operation according to the present invention.

FIG. 9 is an enlarged explanatory diagram of a cleaning state of a nozzle tip portion by first and second rotary cleaner heads.

FIG. 10 is an enlarged explanatory diagram of a cleaning state of the inner surface of the nozzle by the second rotary cleaner head.

FIG. 11 is an enlarged explanatory diagram of the expanding operation at the moment when the second rotary cleaner head separates from the nozzle.

12 (A), (B), (C), (D), (E),
(F) is a perspective view showing a modification of the first rotary cleaner head.

13 (A), (B), (C), (D), and (E) are front views showing modified examples of the second rotary cleaner head, respectively.

FIG. 14 is an explanatory diagram of a turbulent flow state of gas flowing out from a nozzle on which spatter is attached and deposited.

FIG. 15 is a simplified cross-sectional view showing a state in which blowholes (pores) are generated inside the welded portion due to turbulent flow.

[Explanation of symbols]

1 Cleaner body 2 Drive mechanism of cleaner body 3 Control mechanism of drive mechanism 4 Casing 4a Partition wall 5 Ring-shaped hole holder 6 First rotating cleaner head 6a Brush member 6b Central hole 6c, 6d, 6e Concavo-convex surface made of non-brush member 7 Holder 7a Fixing Shaft 8 Second Rotation Cleaner Head 8a Metal Brush Member 9 Rotation Transmission Member 10 Elevation Transmission Member 11 Motor 12 Rotation Shaft 13 Key Member 14 Coupling 14a Coupling Key 15 Tubular Tube 15a Outward Flange 15b Bearing 15c Bearing Case 15d Inward flange 15e Key groove 16 Screw 17 Screw 18 Guide shaft 19 Motor bracket 20 Air cylinder 20a Cylinder rod 21 First timer 22 Second timer 23 Relay 24 Regular 25 Fuse 26 Plug 27 Solenoid valve 28 Stay 29 Proximity sensor 30 Dust cover 30a Removed spatter inclined slide surface 31 Removed spatter discharge port 32 Buffer member 33 Air cylinder rod elevating stroke adjustment member N Arc welding nozzle S Spatter H blow hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuru Namba Yamagata Kushibiki-cho, Kushibiki-cho, Shimoyamazo, Shonan 39 Takashima Sangyo Co., Ltd. Special Electrode Co., Ltd.

Claims (4)

[Claims] 1. A nozzle cleaner for arc welding comprising a cleaner body and a drive mechanism for the cleaner body, wherein the cleaner body has a ring-shaped first portion for removing adhered spatter at the tip of the nozzle. A second rotary cleaner head comprising a rotary cleaner head and a cylindrical brush member that is vertically inserted into a central hole of the first rotary cleaner head and is capable of expanding and contracting in a radial direction to remove adhered spatter on the inner surface of the nozzle. The drive mechanism of the cleaner body includes a motor for rotating the first and second rotary cleaner heads, another rotation transmission member, and a cylinder for raising and lowering the second rotary cleaner head, and the like. Nozzle for arc welding, which is configured to be driven and controlled by an appropriate control mechanism. cleaner. 2. The nozzle cleaner for arc welding according to claim 1, wherein the first and second rotary cleaner heads are detachably attached to the cleaner device. 3. The nozzle cleaner for arc welding according to claim 1, wherein the first and second rotary cleaner heads are made of brush members made of an appropriate material. 4. The nozzle cleaner for arc welding according to claim 1, wherein the first rotary cleaner head is made of a non-brush member metal, a synthetic resin, or a non-ferrous metal member having an uneven portion on its upper surface.