Which type of breach form of 30 thick steel plate has a better butt effect 5

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Weathering steel, that is, atmospheric corrosion resistant steel, is a series of low-alloy steel between ordinary steel and stainless steel, weathering steel is made of ordinary carbon steel with a small amount of copper, nickel and other corrosion-resistant elements, with the strength of high-quality steel, plastic duction, forming, welding, abrasion, high temperature, fatigue resistance, etc.

Characteristic; The weather resistance is 2 8 times that of ordinary carbon steel, and the paintability is twice that of ordinary carbon steel. At the same time, it has the characteristics of rust resistance, corrosion resistance, life extension, thinning and consumption reduction, labor saving and energy saving. Weathering steel is mainly used in steel structures that are exposed to the atmosphere for a long time, such as railways, vehicles, bridges, and towers.

It is used in the manufacture of containers, railway vehicles, oil derricks, port buildings, oil production platforms and containers containing hydrogen sulfide corrosive media in chemical and petroleum equipment.

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The width of the 30° groove butt is equal to the width of the slope of the unilateral groove, as shown in the figure below.

One side is 30 degrees, and the two sides together are 60 degrees.

You need to make the electrode head at least 3mm above the 2mm blunt edge, which means that the diameter of your electrode also plays a certain role, you can calculate it, or draw a figure.

1. Equipment preparation: inspection and debugging of welding equipment and tooling, adjustment of welding parameters, and selection of appropriate welding materials.

2. Workpiece preparation (1) groove cleaning: Before welding, the welder should check the surface of the groove, and there should be no cracks, delamination, inclusions and other defects, and should remove oxides, oil, slag and other harmful substances within the scope of at least 20mm on the surface of the base metal on both sides of the welded joint and the base metal on both sides of the groove.

2) Welding joint alignment: the method of welding joint matching is carried out by using fixture positioning or direct spot welding in the groove, and the welding joint should not be cracked during the welding process, and the welding of the bottom weld is not affected; The control of the number of misalignment, the gap and the angle of the counterpart shall not exceed the provisions of the corresponding product manufacturing and acceptance standards.

The allowable thickness difference of important butt joints of different thicknesses of metal materials is shown in the table below.

If the thickness difference (δ1-δ) exceeds the specified value in the table, or when the double-sided exceeds 2 (δ1-δ), the transition form of single-sided or double-sided inclined plane processed on the thicker plate is shown in the figure below, and the angle joint and T-joint stressed weld with different thickness of the steel plate can be transitioned in the form of (b) and (c) in the following figure.

This kind of butt is very common How to open the groove depends on your construction benchmark Generally, V-shaped fully transparent groove is generally used For example, when 20mm butt 30mm steel plate, you need to open a transition slope on the 30mm steel plate The transition groove should first draw 20 mm on the thickness of the 30mm steel plate Then draw a long groove slope with a thickness difference of 3 times the plate thickness difference on the 20mm point, and then cut it off as a transition groove and then continue to open a 20-degree welding groove Note that the length of the transition groove slope should be at least 3 times the thickness difference Specific requirements refer to the construction benchmark.

Beveling is a term for welding, which is to take a certain margin on the material and leave it for welding to fill. In order to ensure the quality of welding, the workpiece needs to be welded before welding, which can be gas cut or cut. It is usually inclined and sometimes curved.

For example, two steel plates with a thickness of 10mm should be welded together, and in order to make the weld seam firm, a chamfer will be milled on the edge of the plate, which is called a bevel.

The groove is mainly used to weld the workpiece and ensure the degree of welding. Under normal circumstances, the profile processed by the machining method can also be gas cut when the requirements are not high (if it is a type of weld, ultrasonic flaw detection is required, the machining method can only be used), but the oxidation slag needs to be removed, according to the need, there are K-shaped grooves, V-shaped grooves, shaped grooves, U-shaped grooves and other groove forms, but most of them require to retain a certain blunt edge.

When the steel plate of different thickness is docked, the joint of the thick plate should be thinned and thinned, otherwise the stress concentration will occur after welding;

After thinning, according to the requirements of the ordinary steel plate butt beveling, the single side is single-sided, the double-sided is double-sided, the X-type is X-shaped, the Y-type is Y-shaped, the U-shaped is U-shaped, and the welding requirements are the same as the welding of steel plates of equal thickness.

BM-12A Automatic Steel Plate Beveling Machine.

BM-12A Automatic Steel Plate Beveling Machine Features: Compact structure and design Machinable steel plate and pipe head 2200W high-power motor Maximum slope width 18mm Cold cutting, no oxidation on the slope Efficient beveling operation No iron pin splashing, safer operation BM-12C automatic steel plate beveling machine Parameters: Power supply AC 380V 50hz motor power 2200w motor speed 1450rpm bevel speed The bevel angle is adjusted by replacing the angle wheel!

The single feed width is 12mm, the maximum groove width is 18mm, the thickness of the processed steel plate is 6-30mm, the diameter of the processed round pipe is 150mm, the minimum clamping plate width is 55mm, and the net weight of the machine is 105kg

Hope it helps, thank you.

1. Bevel the thin plate, and bevel according to the requirements of the welding depth.

Second, the professional factory has a special beveling machine; Generally, it can also be formed by milling, planing and other methods.

3. Welding requires being able to write a book. You have to determine the actual condition of your workpiece. Write several parts separately before welding, during welding, after welding, and inspection.

No processing, directly with 502 bonding.

Trapezoidal joint, the welding surface of the thick plate is cut on the slope and the blunt edge is welded with the same thickness as the thin plate.

V-port butt does not need to be thinned.

Steel plate is a flat steel made by pouring molten steel, cooling it and pressing it.

The steel plate is flat, rectangular and can be rolled directly or sheared from a wide strip of steel.

Steel plates are divided according to thickness, thin steel plates < 4 mm (the thinnest mm), thick steel plates 4 60 mm, and extra-thick steel plates 60 115 mm.

Steel plate is divided into hot rolled and cold rolled according to rolling.

The width of the sheet is 500 1500 mm; The width of the thickness is 600 3000 mm. Thin plates are divided into ordinary steel, high-quality steel, alloy steel, spring steel, stainless steel, tool steel, heat-resistant steel, bearing steel, silicon steel and industrial pure iron sheet. According to professional use, there are plates for oil drums, enamel plates, bulletproof plates, etc.; According to the surface coating, there are galvanized sheets, tinned sheets, lead-plated sheets, plastic composite steel plates, etc.