CN102489844A - Method for welding magnetized sheet low-temperature steel - Google Patents

Abstract

The invention discloses a method for welding magnetized sheet low-temperature steel. The first weld joint of a groove is welded through automatic welding, and a welding tooling for preventing from burning through is used on the back of the groove, so that the aims of welding and demagnetization can be fulfilled more easily and quickly, and the cost is low.

Description

Welding method after a kind of thin plate low-temperature steel magnetization

Technical field

The present invention relates to the welding method after a kind of thin plate low-temperature steel magnetizes.

Background technology

The low-temperature steel container can produce magnetization phenomenon because of adopting reasons such as magnetic chuck lifting in the mill.On the thin workpiece of this workpiece that has magnetic especially thickness of slab, the difficulty of manual welding striking and welding can increase.In order to weld, we can take the method for demagnetization usually.But traditional demagnetization method generally needs degausser or heat-treats.Because such restriction has been arranged, make degaussing process become loaded down with trivial details and cost higher.

Summary of the invention

Problem to be solved by this invention provides the solution that is difficult to weld after a kind of thin plate low-temperature steel magnetization.

For solving the problems of the technologies described above, technical scheme of the present invention is: the welding method after a kind of thin plate low-temperature steel magnetization may further comprise the steps:

1. bevel for welding assembles by related request, and groove face is checked on request, cleared up;

2. with channel-section steel or I-steel as frock, filling flux utilizes channel-section steel or I-steel solder flux to be close to the back side of bevel for welding then within it;

3. the groove preheating to welding;

4. adopt the first road weld seam of weldering bevel for welding automatically, the welding of first road finishes back magnetic to be eliminated basically, and remaining weld seam weldering is appropriate;

5. remove the frock of back of weld, remove the first road welding bead clean;

6. the weldering of back chipping place is appropriate.

Method mainly is after solution low-temperature steel thin plate workpiece is magnetized, the problem that can not carry out manual welding striking and welding.

In pressure vessel factory makes, can be because carry out work piece hoisting or because other reasons generation magnetic field with " magnet hangs ", and the low-temperature steel material is magnetized owing to the reason of the character of material own easily.Because the magnetization situation is more serious, the difficulty of manual welding striking and welding can increase, the problem of conventional method remover apparatus and cost aspect, the uncertain purpose that can reach removal magnetic.After the inventive method has solved low-temperature steel thin plate workpiece and has been magnetized, the problem that can not carry out manual welding striking and welding.This method uses automatically that weldering comes bevel for welding, and uses the welding tooling that prevents burn-through, can be than the purpose that is easier to and reaches apace welding and demagnetization, and cost is lower.This method does not need additional apparatus, and practicality simple to operate is highly suitable in the large-scale manufacturing works and implements.

Description of drawings

Fig. 1 has installed the groove section sketch map that prevents the burn-through frock;

Fig. 2 is the weld seam sketch map after first road is welded in weldering automatically.

The specific embodiment

Welding method after a kind of thin plate low-temperature steel magnetization may further comprise the steps:

1. groove assembles by related request, and groove face is checked on request, cleaning;

2. increase the frock shown in figure one, filling flux in channel-section steel or the I-steel utilizes channel-section steel or I-steel that solder flux is close to back of weld then;

3. preheating;

4. first road is welded in weldering automatically, and the welding of first road finishes back magnetic to be eliminated basically, can be by former requirement with remaining weld seam weldering appropriate (notes 1);

5. frock is removed at the back side, removes the first road welding bead clean; (annotating 2)

6. the weldering of back chipping place is appropriate.

Annotate 1: because groove has magnetic, the manual welding welding rod can be because the reason of magnetic can't striking during near groove.Therefore select to use the automatic weldering more stable to weld than manual welding.But workpiece is thinner, and groove also is the manual welding groove, with weldering can burn-through automatically.In order to address this problem, adopt little electric current welding and prevent burn-through with a simple frock, as shown in Figure 1.

Annotate 2: after weld together, welding bead is illustrated in figure 2 as the welding bead of similar " S " type, can be in single face welding finishing back during back gouging with this road welding bead removing totally, and then the back side is welded appropriate.

Claims (1)

1. the welding method after a thin plate low-temperature steel magnetizes is characterized in that, may further comprise the steps:

1. bevel for welding assembles by related request, and groove face is checked on request, cleared up;

2. with channel-section steel or I-steel as frock, filling flux utilizes channel-section steel or I-steel solder flux to be close to the back side of bevel for welding then within it;

3. the groove preheating to welding;

4. adopt weldering welding first road automatically, the welding of first road finishes back magnetic to be eliminated basically, and remaining weld seam weldering is appropriate;

5. remove the frock of back of weld, remove the first road welding bead clean;

6. the weldering of back chipping place is appropriate.

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