CN210359920U

CN210359920U - A guard shield for titanium alloy welding protection

Info

Publication number: CN210359920U
Application number: CN201920949225.XU
Authority: CN
Inventors: 刘建伟; 王树明; 李子青; 原星; 王平
Original assignee: Shanxi North Machine Building Co Ltd
Current assignee: Shanxi North Machine Building Co Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-04-21
Anticipated expiration: 2029-06-24

Abstract

The utility model relates to a protective cover for titanium alloy welding protection, belonging to the welding technical field; the method comprises the following steps: the air receiving pipe (1), the blocking plate (2) and the air outlet head (3); the gas receiving pipe (1) is used for receiving protective gas and is of a tubular structure; the blocking plate (2) is used for converting gas input from a small pipe diameter into a large pipe diameter, even if protective gas of the gas receiving pipe enters the gas outlet head without leakage, the gas outlet head is of an annular sheet structure, the inner diameter of the gas outlet head is matched with that of the gas receiving pipe, and the outer diameter of the gas outlet head is matched with that of the gas receiving pipe; the gas outlet head (3) is used for increasing the output of the area of the shielding gas input by the gas receiving pipe so as to fully spread the shielding gas from the upper surface of the part to be welded to isolate the welding part from the air and is of a tubular structure with an inclined outlet; the blocking plate (2) is welded at the non-inclined end of the gas outlet head (3), and the gas connecting pipe (1) is welded on the blocking plate (2). Compared with the prior art, the utility model can increase the welding protection area; the structure is simple, and the manufacture is convenient; the quality of the welding joint is improved.

Description

A guard shield for titanium alloy welding protection

Technical Field

The utility model relates to a guard shield for titanium alloy welding protection belongs to the welding technology field.

Background

Titanium alloy activity is big, not only in the molten state, even in the solid-state easy pollution such as air, moisture, grease, cinder of high temperature more than 300 ℃, absorb elements such as oxygen, nitrogen gas, hydrogen, carbon, make welded joint easy oxidation, nitrogenize, appear hydrogen embrittlement, welded joint's plasticity and impact toughness decline to easily arouse the gas pocket, cause very big difficulty for the welding, consequently need proper protection when executing welding, and the utility model discloses just solve the active poor problem of welded joint quality that causes of protection that leads to of metal titanium, for solving these problems, adopt a tool-guard shield that is used for titanium alloy welding protection.

Disclosure of Invention

The utility model aims at overcoming prior art's defect, in order to improve the protection area, welding quality is guaranteed to the welding seam front postweld cooling process's protection, provides a guard shield that is used for titanium alloy welding protection.

The purpose of the utility model is realized through the following technical scheme.

A shield for titanium alloy weld protection, comprising: a gas receiving pipe, a gas outlet head and a blocking plate;

the gas receiving pipe is used for receiving protective gas and is of a tubular structure;

the gas outlet head is used for increasing the output of the area of the shielding gas input by the gas receiving pipe so as to fully spread the shielding gas from the upper surface of the part to be welded to isolate the welding part from the air, and is of a tubular structure with an inclined outlet;

the blocking plate is used for converting gas input by a small pipe diameter into a large pipe diameter, even if protective gas of the gas receiving pipe enters the gas outlet head without leakage, the gas outlet head is of an annular sheet structure, the inner diameter of the gas outlet head is matched with that of the gas receiving pipe, and the outer diameter of the gas outlet head is matched with that of the gas outlet head;

the closure plate is welded at the non-inclined end of the gas outlet head, and the gas connecting pipe is welded on the closure plate.

Preferably, one end of the inclined plane of the gas outlet head is a cut inclined plane along a k range lower than the diameter r, and a sealing sheet is used for sealing part of the opening on the lower end face, so that the protective area is increased while protective gas is concentrated.

Preferably, k is 0.75 r.ltoreq.k.ltoreq.0.8 r.

Preferably, the sealing piece is made of steel or copper.

Preferably, the air receiving pipe and the air outlet head are made of copper materials, and the blocking plate is made of steel materials.

Advantageous effects

Compared with the prior art, the utility model provides a device has following characteristics:

1. the protective area of the titanium alloy during welding can be increased, so that the protective gas is densely distributed above and at two sides of the welding part;

2. the structure is simple, and the manufacture is convenient;

3. the quality of the welding joint is improved, and the qualification rate is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the air receiving tube;

FIG. 3 is a schematic view of a closure plate;

FIG. 4 is a schematic view of a gas outlet head;

reference numerals: 1-air receiving pipe; 2-blocking plate; 3-gas outlet head; and 4-sealing the sheet.

Detailed Description

To illustrate the objects, technical solutions and advantages of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

As shown in fig. 1, is a schematic structural diagram of the present invention. The utility model relates to a guard shield for titanium alloy welding protection comprises trachea 1, closure plate 2, play gas head 3.

The gas receiving pipe 1 is used for receiving protective gas and has a tubular structure;

the gas outlet head 3 is used for increasing the output of the area of the shielding gas input by the gas receiving pipe so as to fully spread the shielding gas from the upper surface of the part to be welded to isolate the welding part from the air and is of a tubular structure with an inclined outlet;

the blocking plate 2 is used for converting gas input by a small pipe diameter into a large pipe diameter, even if protective gas of the gas receiving pipe enters the gas outlet head without leakage, the gas outlet head is of an annular sheet structure, the inner diameter of the gas outlet head is matched with that of the gas receiving pipe, and the outer diameter of the gas outlet head is matched with that of the gas receiving pipe;

the closure plate 2 is welded at the non-inclined end of the gas outlet head 3, and the gas connecting pipe 1 is welded at the central hole of the closure plate 2.

The method of making and using the present invention will be described below with reference to a shroud having an outlet diameter of 150mm and an outlet diameter of 25 mm.

1. As shown in fig. 2, a copper tube with a length of 50mm and a diameter of phi 10 × 2 is selected as the air receiving tube 1, because the copper can prevent oxidation and the air passes through the copper tube cleanly, of course, other suitable hard materials can be selected.

2. As shown in figure 3, a steel belt with the thickness of 0.3mm is selected again to be made into a ring-shaped closure plate 2, the diameter of the ring-shaped closure plate is 25mm, and a hole with the diameter of 10mm is punched in the middle of the ring-shaped closure plate. The reason for selecting the steel strip is that the steel strip is cheap, can completely meet the requirements in the welding process, and is thinner and easier to process the blocking plate. Of course, other suitable hard materials may be used.

3. As shown in FIG. 4, a copper tube of 100mm length and phi 25X 0.5 is selected as the gas outlet head 3, one end of the copper tube is machined to have a slope of 5mm at the end of 120 degrees, and then the machined opening is sealed by brazing at the lower part and 50mm at the upper part with a copper sheet of 0.1mm, i.e. a sealing sheet 4. Copper tubes and copper sheets are selected because copper can prevent oxidation and gas is cleaner when passing through the copper tubes. Of course, other suitable materials, such as steel, may be used.

4. As shown in figure 1, will connect trachea 1 welding in the central point of closure plate 2 with brazing, the welding seam welds at closure plate 2 both ends, will go out the gas head 3 welding simultaneously at the border of closure plate 2, and the welding seam welds at closure plate 2 both ends, does not allow gas leakage, and the result of brazing is light, non-deformable.

The use method of the shield comprises the following steps:

the other end of the gas receiving pipe 1 of the protective cover is connected with the rubber pipe by a first person, so that the protective cover is communicated with an argon bottle, the gas is ventilated 1-2 minutes before welding, the stable and uniform overflow of airflow is guaranteed, a titanium alloy test plate is placed on the support cover, a second person takes the welding gun and the welding wire for welding, a third person moves the support cover, when the color of the titanium alloy test plate is light blue (namely the temperature is lower than 300 ℃), the protection can be basically finished, then the first person and the third person move the support cover and the protective cover simultaneously along with the movement of the welding gun, the titanium alloy welding at the back of the protection is carried out, the welding process is repeated, the welding joint of the titanium alloy is well protected, and the qualification rate of products is also improved.

In order to explain the contents and embodiments of the present invention, specific examples are given in the present specification. The introduction of details in the examples is not intended to limit the scope of the claims but rather to aid in the understanding of the present disclosure. Those skilled in the art will understand that: various modifications, changes or substitutions to the preferred embodiment steps are possible without departing from the spirit and scope of the invention and its appended claims. Therefore, the present invention should not be limited to the disclosure of the preferred embodiments and the accompanying drawings.

Claims

1. A guard shield for titanium alloy welding protection which characterized in that: the method comprises the following steps: the air receiving pipe (1), the blocking plate (2) and the air outlet head (3);

the gas receiving pipe (1) is used for receiving protective gas and is of a tubular structure;

the blocking plate (2) is used for converting gas input from a small pipe diameter into a large pipe diameter, even if protective gas of the gas receiving pipe enters the gas outlet head without leakage, the gas outlet head is of an annular sheet structure, the inner diameter of the gas outlet head is matched with that of the gas receiving pipe, and the outer diameter of the gas outlet head is matched with that of the gas receiving pipe;

the gas outlet head (3) is used for increasing the output of the area of the shielding gas input by the gas receiving pipe so as to fully spread the shielding gas from the upper surface of the part to be welded to isolate the welding part from the air and is of a tubular structure with an inclined outlet;

the blocking plate (2) is welded at the non-inclined end of the gas outlet head (3), and the gas connecting pipe (1) is welded on the blocking plate (2).

2. The shroud of claim 1, wherein: one end of the inclined plane of the gas outlet head (3) is an inclined plane which is cut along the k range lower than the diameter r, and a sealing piece (4) is used for sealing partial opening on the lower end face, so that the protective area is increased while the protective gas is concentrated.

3. The shroud of claim 2, wherein: k is more than or equal to 0.75r and less than or equal to 0.8 r.

4. The shroud of claim 2, wherein: the sealing piece (4) is made of steel or copper.

5. The shroud of any one of claims 1-4, wherein: the air receiving pipe (1) and the air outlet head (3) are made of copper materials, and the blocking plate (2) is made of steel materials.