CN211360997U

CN211360997U - Welding material feeding device

Info

Publication number: CN211360997U
Application number: CN201922444278.9U
Authority: CN
Inventors: 张坤; 程显英; 程明; 刘凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-08-28
Anticipated expiration: 2029-12-30

Abstract

A welding material supply device, wherein a screw blade is mounted on a screw shaft rotationally driven by a driving unit to form a screw feeder, the screw feeder is disposed in a tubular nozzle body, a welding material is supplied to the tubular nozzle body through a welding material supply pipe, and the welding material in a powder form or a granular form is sufficiently supplied to the bottommost part of a bevel of a workpiece from a welding material outlet at the front end of the tubular nozzle by rotation of the screw feeder, thereby improving welding efficiency and ensuring welding stability.

Description

Welding material feeding device

Technical Field

The utility model relates to a welding field, concretely a welding material feeding device.

Background

The duck pond river super bridge is one of four controllable projects of a precious railway, the main span of the duck pond river super bridge is 436 meters, the bridge is the largest span bridge of the precious railway, and the bridge has the engineering technical characteristics of high pier, large span and novel structure. Structurally, the steel concrete combined arch structure is adopted for the first time, the characteristics of the combined structure are fully utilized, materials are saved, and the structure is stressed simply and reasonably. The steel truss arch of the most important component of the bridge has the total weight of 12000 tons, is assembled into a hoisting section by factory manufacturing, transportation, shoreside pre-tailor welding and assembly in a yard, and is hoisted integrally by a cable crane. The arch rib has various forms and complex structure, the welding position relates to flat welding, vertical welding, transverse welding and the like, and the welding method of the main welding structure is automatic submerged arc welding so as to realize high-efficiency and low-cost welding. During automatic submerged arc welding, the flux is uniformly deposited on the assembled workpiece after flowing out of the hopper, and the welding wire is fed into a welding arc area through a wire feeding mechanism by a wire feeding roller and a contact nozzle. Two ends of the welding power supply are respectively connected with the contact tip and the workpiece. The wire feeder, flux hopper, and control panel are typically mounted on a cart for movement of the welding arc. The continuously fed wire creates an arc between the welding wire and the weldment below the flux layer, and the heat of the arc melts the wire, workpiece, and flux to form a molten metal pool that is isolated from the atmosphere. As the welder automatically moves forward, the arc continuously melts the forward weldment metal, welding wire and flux, the edge behind the molten pool begins to cool and solidify to form a weld bead, and the liquid slag then condenses to form a hard skull.

As described above, in order to supply the flux in the groove, the flat welding is generally performed, but in the case of the transverse submerged arc welding, the groove of the workpiece is as shown in fig. 3, the tip of the flux supply nozzle extends to the groove, and the flux in the flux funnel falls by gravity from the flux supply nozzle and is supplied into the groove. However, when the thickness of the workpiece increases, it is difficult to continuously feed the flux into the groove simply by the gravity of the flux, resulting in a limitation in welding speed. Such feed limitations also exist in plasma and laser deposited alloy powder feeds.

SUMMERY OF THE UTILITY MODEL

The object of the utility model is to solve the above-mentioned circumstances, aim at providing a welding material feeding device, can supply the groove of work piece with enough volume welding material reliably, obtain faster welding speed to and ensure stable welding.

The utility model provides a welding material feeding device for with granular or powdered welding material in the hopper from the nozzle tip supply to the groove part of work piece, welding material feeding device includes the hopper, and the welding material supply pipe is connected to the nozzle, the nozzle has nozzle main part and nozzle tip, the nozzle tip is the welding material export, be provided with the screw feeder in the nozzle main part, the screw feeder includes along the axial extension screw axis of nozzle main part and the helical blade of connecting on the screw axis; the screw pitch of the spiral blade is 10-60mm, and the spiral blade further comprises a driving device for driving the spiral shaft to rotate.

In the welding material supply device, it is preferable to arrange to be able to hold the hopper in a pressurized state. Particularly, the pressure in the hopper is regulated and controlled by arranging a pressure control unit. More specifically, the welding material supply device comprises a source of compressed gas for supplying high pressure gas to the hopper.

The nozzle is provided with a tubular nozzle body and a welding material inlet which is positioned above the nozzle body and extends obliquely, a small-diameter nozzle tip is formed at the part of the nozzle body close to the groove so as to be inserted into the groove of the workpiece, and the nozzle tip is a flexible pipe made of silicon rubber and the like. Wherein the driving device is a speed reducing motor. The granular welding material is a submerged arc welding flux, the powdery welding material is laser deposited alloy powder or plasma deposited alloy powder, and any other powder or granular welding material can be conveyed. The included angle between the axis of the nozzle body and the plane of the end face of the welded plate is 10-40 degrees, so that the nozzle body can supply welding materials to the groove.

Advantageous effects

Compared with the prior art, the utility model discloses be in such state in the welding process of work piece: the welding material is supplied to the nozzle, the spiral shaft of the spiral feeder in the nozzle body is driven by the driving unit to rotate, and the welding material is forcibly introduced into the groove of the workpiece, so that the feeding efficiency is improved, and the welding with higher efficiency can be realized. When the hopper is substantially equal to atmospheric pressure, the flux from the hopper to the flux inlet is dependent only on gravity, and when the flux hopper is maintained in an internally pressurized state (i.e., greater than atmospheric pressure), the flux in the flux hopper becomes more likely to flow into the flux inlet and the nozzle, further increasing the amount of flux supplied to the bevel of the workpiece. The conveying efficiency can also be improved when the conveying device is used for conveying welding powder such as laser deposited alloy powder or plasma deposited alloy powder.

Drawings

Fig. 1 is a cross-sectional side view of the welding material supply apparatus of the present invention.

Fig. 2 is a structural view of the nozzle of the present invention.

Fig. 3 is a schematic view of a flux supply method in the prior art.

1 hopper 11 welding material supply pipe 2 nozzle 3 compressed gas source 4 workpiece 4a bevel 5 welding material 6 inlet 21 nozzle body 22 screw shaft 23 screw blade 8 nozzle tip 7 drive.

Detailed Description

The following are specific embodiments of the present invention and further description of the technical solutions with reference to the drawings, but the present invention is not limited to these embodiments.

Fig. 1 to 2 show an example of an embodiment of the present invention, and as shown in fig. 1, the welding material supplying apparatus of the present invention includes a hopper 1 for supplying granular or powdery welding material in the hopper 1 from a nozzle tip to a beveled portion of a workpiece, the hopper 1 being connected to a welding material supply pipe 11, and granular or powdery welding material in the hopper, wherein the granular welding material is optionally a submerged arc welding flux, and the powdery welding material is optionally laser deposited alloy powder or plasma deposited alloy powder. The welding material supply pipe 11 is made of a rubber hose or the like, which is connected to the nozzle 2; the nozzle 2 is provided with a tubular nozzle body 21 and a nozzle tip 8, the nozzle tip 8 being a welding material outlet, the nozzle further comprising a welding material inlet 6 extending obliquely above the nozzle body, a screw feeder axially extending in the tubular nozzle body 21, the screw feeder comprising a screw shaft 22 extending in the axial direction of the nozzle body and a screw blade 23 connected to the screw shaft 22, the screw blade having a pitch of 10 to 60mm to supply an appropriate amount of welding material. The screw shaft is rotationally driven by a driving device 7 (e.g., a reduction motor), and the welding material 5 is introduced into the nozzle body 21 from the welding material inlet 6, thereby being forcibly supplied to the bevel 4a of the workpiece 4. A portion of the nozzle body 21 near the bevel is formed with a nozzle tip 8 of a small diameter so as to be inserted into the bevel 4a of the workpiece 4, the nozzle tip 8 being a flexible tube made of silicone rubber or the like. When the welding material passes through the nozzle 2, it moves along the bevel 4a of the workpiece 4 by movement of a carriage (not shown).

In the welding material supply device, it is preferable to arrange to be able to hold the hopper in a pressurized state. Particularly, the pressure in the hopper is regulated and controlled by arranging a pressure control unit. More specifically, the welding material supply device comprises a source of compressed gas 3 for supplying high-pressure gas to the hopper. The included angle between the axis of the nozzle body and the plane of the end face of the welded plate is 10-40 degrees, so that the nozzle can supply welding materials to the groove.

Next, the operation of the illustrated embodiment will be described by taking the feeding of the submerged arc flux as an example. In fig. 1, in the process of welding a workpiece 4 (plate material) in the lateral direction, in a state where the tip bottom of a nozzle is adapted to be substantially in contact with the lower surface of a bevel 4a, a screw shaft of a screw feeder is driven to rotate by a driving device, flux is introduced from a hopper 1 into the interior of a nozzle body via a welding material supply tube and a welding material inlet of the nozzle, and the screw shaft and a screw blade rotating together send the flux to the front end side of the nozzle body to be forcibly supplied from the nozzle tip to the bevel of the workpiece.

In particular, even when the thickness of the work is thick, a sufficient amount of flux can be supplied to the groove, and welding can be performed stably, so that the welding speed can be increased. In a similar way, the utility model discloses a welding material feeding device still is applicable to and supplies to the groove among plasma or the laser cladding technique and deposits alloy powder, and then alloy powder forms build-up welding cladding layer under the effect of plasma heat source or laser heat source, can be used to work piece restoration, manufacturing.

In order to increase the conveying efficiency, at the same time, gas supplied from a compressor (not shown) or the like compressed air source 3 is introduced into the flux hopper, and is regulated by a pressure control unit so that the inside of the hopper 1 is maintained in a desired pressurized state and a stable conveying speed. When the hopper 1 is substantially equal to the atmospheric pressure, the welding material from the hopper 1 to the welding material inlet of the feed nozzle 2 is fed by gravity only, and when the hopper 1 is kept pressurized inside, the welding material enters the bevel of the work 4 more smoothly, and the amount of the fed welding material is further increased.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A welding material supply apparatus for supplying a granular or powdery welding material in a hopper (1) from a nozzle tip (8) to a bevel (4a) portion of a workpiece, characterized by comprising a hopper (1) connected to a welding material supply tube (11), the welding material supply tube (11) being connected to a nozzle (2), the nozzle (2) having a nozzle body (21) and a nozzle tip (8), the nozzle tip being a welding material outlet, the nozzle body being provided therein with a screw feeder including a screw shaft (22) extending in an axial direction of the nozzle body and a screw blade (23) connected to the screw shaft; the pitch of the helical blade is 10-60 mm; the nozzle further comprises an obliquely extending welding material inlet (6) located above the nozzle body; the device also comprises a driving device (7) for driving the screw shaft (22) to rotate; the device also comprises a pressure control unit which enables the hopper (1) to be kept in a pressurization state and can adjust the pressure in the hopper (1).

2. Welding material supply device according to claim 1, further comprising a source of compressed gas (3) connected to the hopper (1).

3. Welding material supply device according to claim 1, characterized in that the nozzle body (21) is tubular.

4. Welding material supply device according to claim 1, characterized in that the angle between the axis of the nozzle body and the plane of the end faces of the welded blank is 10-40 °.

5. Welding material supply device according to claim 1, characterised in that the drive means (7) is a gear motor.

6. The welding material supply apparatus according to claim 1, wherein the granular welding material is a submerged arc welding flux, and the powdery welding material is a laser-deposited alloy powder or a plasma-deposited alloy powder.