CN104588844B - A kind of welding procedure of steel plate - Google Patents

Abstract

The invention discloses the welding procedure of a kind of steel plate, relate to welding technique field, mainly include welding front preparation, tack weld, welding, four steps of after welding treatment.The welding procedure of a kind of steel plate that the present invention provides, simplifies welding step, and welding manner is simple, material selection exact specification, can guarantee that the welding quality of steel pipe, be the steel plate of the 1 millimeters thick welding manner that provides a kind of specification, the welding fast and safely of the steel plate of beneficially 1 millimeters thick.

Description

A welding process for steel plates

technical field

The invention relates to the technical field of welding technology, in particular to a welding technology for steel plates.

Background technique

Different welding methods have different welding processes. The welding process is mainly determined according to the material, grade, chemical composition of the workpiece to be welded, the structure type of the weldment, and the welding performance requirements. First of all, it is necessary to determine the welding method, such as manual arc welding, submerged arc welding, argon tungsten arc welding, gas metal arc welding, etc. There are many types of welding methods, which can only be selected according to specific conditions. After the welding method is determined, the welding process parameters are formulated. The types of welding process parameters are different. For example, manual arc welding mainly includes: electrode type (or grade), diameter, current, voltage, type of welding power source, polarity connection, welding The number of layers, the number of channels, the inspection method and so on. However, due to the diversity of welding methods and welding materials, there are various irregularities in the welding process, which leads to low quality of welded workpieces and sometimes accidents.

Contents of the invention

The object of the present invention is to provide a welding process for steel plates in order to make up for the deficiencies of the prior art.

The purpose of the present invention is achieved through the following technical solutions:

A kind of welding process of steel plate, wherein the thickness of steel plate is 1 millimeter, it is characterized in that: comprise the following steps:

(1) Preparation before welding:

First, remove the dirt on the surface of the parts to be welded, such as iron filings, oil stains, etc.;

Second, choose the welding method and welding materials, use tungsten inert gas shielded welding, use H08Mn2SiA steel wire as the welding wire, and use an AC welding machine as the flux;

Third, clear the accumulated water and snow on the surface of the welded parts to ensure the dryness of the welded parts;

(2) Temporary spot welding:

First, the height and width of the temporary spot welding shall not exceed the size of the future weld, and shall be part of the future weld;

Second, according to the size of the welded structural parts, the length of spot welding can be selected from 10 to 80mm;

Third, fill the arc crater;

Fourth, the important welding structure should be spot welded on the back under possible conditions. After the front side is welded, the spot welding on the back should be cut off, and then the back side should be welded;

(3) Welding:

Use 1.6mm electrode diameter, 50-80A welding current, 4mm filler wire diameter, gas flow rate 4-6L per minute, and weld at a speed of 100-120mm per minute; two operators are synchronized on the outside and inside of the workpiece Carry out bottom-up manual tungsten inert gas shielded welding and vertical welding. When welding, the welding torch outside the workpiece is dominant, and the welding torch swings from side to side and fills wire orderly. , to strengthen the protection of the inner surface to ensure that the inner surface of the weld is well formed;

(4) Post-welding treatment:

First, polish the unsightly welds and clean up the spatter;

Second, use flame or mechanical correction to weld deformation that affects quality and appearance.

The advantages of the present invention are:

A steel plate welding process provided by the invention simplifies the welding steps, the welding method is simple, and the material selection is accurate and standardized, which can ensure the welding quality of steel pipes, and provides a standardized welding method for steel plates with a thickness of 1 mm, which is beneficial to 1 Fast and safe welding of millimeter thick steel plates.

detailed description

A welding process for steel plates, characterized in that it comprises the following steps:

(1) Preparation before welding:

First, remove the dirt on the surface of the parts to be welded, such as iron filings, oil stains, etc.;

Second, choose the welding method and welding materials, use tungsten inert gas shielded welding, use H08Mn2SiA steel wire as the welding wire, and use an AC welding machine as the flux;

Third, clear the accumulated water and snow on the surface of the welded parts to ensure the dryness of the welded parts;

(2) Temporary spot welding:

First, the height and width of the temporary spot welding shall not exceed the size of the future weld, and shall be part of the future weld;

Second, according to the size of the welded structural parts, the length of spot welding can be selected as 50mm;

Third, fill the arc crater;

Fourth, the important welding structure should be spot welded on the back under possible conditions. After the front side is welded, the spot welding on the back should be cut off, and then the back side should be welded;

(3) Welding:

The electrode diameter is 1.6mm, the welding current is 60A, the filler wire diameter is 4mm, the gas flow rate is 6L per minute, and the welding is performed at a speed of 120mm per minute; two operators are simultaneously on the outside and inside of the workpiece to perform bottom-up welding Manual tungsten inert gas shielded welding vertical welding, when welding, the welding torch outside the workpiece is dominant, and the welding torch swings from side to side and fills the wire in an orderly manner. The welding torch on the inner surface does not burn, and only acts as a back gas protection to strengthen the protection of the inner surface. Ensure that the inner surface of the weld is well formed;

(4) Post-welding treatment:

First, polish the unsightly welds and clean up the spatter;

Second, use flame or mechanical correction to weld deformation that affects quality and appearance.

Claims (1)

1. a welding procedure for steel plate, the thickness of its light plate is 1 millimeter, it is characterised in that: comprise the following steps:

(1) preparation before welding:

The first, to-be-welded pieces surface contaminants is removed: iron filings, greasy dirt；

The second, selecting welding manner and select welding material, selecting gas tungsten arc welding welding, welding wire selects H0₈Mn₂SiA grade of steel welding wire, welding machine uses AC welding set；

3rd, hydrops and the accumulated snow on weldment surface are removed, it is ensured that being dried of weldment；

(2) tack weld:

The first, the size of weld seam, a part for weld seam after should being after the height of tack weld and width must not exceed；

The second, according to the size of welding structural element, the length of spot welding may select 10～80mm；

3rd, arc crater is filled up；

4th, important Welding Structure may under conditions of, should spot welding overleaf, after the spot welding at the back side should being sliced off after front welds, then weld the back side；

(3) welding:

Using the electrode diameter of 1.6mm, the welding current of 50-80A, the filler wire diameter of 4mm, gas flow 4-6L is per minute, welds with the speed that 100-120mm is per minute；Two operators synchronize the manual TIG welding vertical position welding carried out from bottom to top respectively outside workpiece with inner face; during welding; take as the leading factor with the welding gun outside workpiece; carry out orderly welding gun to swing and fill silk; the welding gun of inner face does not burns; back lifting gas shielded effect, to strengthen inner face protection, it is ensured that weld seam inner face well shapes；

(4) after welding treatment:

The first, inaesthetic weld seam is polished, and clear up splash；

The second, the welding deformation of quality and outward appearance is affected with flame or mechanical checkout.