A method for butt joining angle steel

Abstract

The application discloses a butt joint method of angle steels in the technical field of steel structure welding, and the method comprises the following steps: (1) selecting a first angle steel and a second angle steel, the height of the first angle steel is greater than the height of the second angle steel; (2) cutting the first angle steel: cutting a V-shaped notch on the upper part of the butt joint end of the first angle steel, the butt joint end of the first angle steel is divided into an upper butt joint end and a lower butt joint end through the V-shaped notch; cutting the end of the upper butt joint end into a butt joint bevel, and cutting the lower butt joint end vertically; (3) pressing the upper butt joint end of the first angle steel, and the upper butt joint end is bent after being pressed; after being bent, the lower edge of the upper butt joint end is in contact with the lower wall of the V-shaped notch, a first weld is formed at the contact position, the butt joint bevel of the upper butt joint end is in butt joint with the end face of the second angle steel, a second weld is formed, and the end face of the lower butt joint end is in butt joint with the end face of the second angle steel, a third weld is formed; (4) welding the first weld, the second weld and the third weld. The application has the advantage of improving the efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel structure welding, in particular to a method for butt joint of angle steel. BACKGROUND

[0002] Angle steel can be used to form various load-bearing members according to different needs of structures, and can also be used as connecting pieces between structures, and is widely used in ship structure construction. Ship structure construction is the most massive and tedious process in the entire ship construction. The ship structure has various forms, and different specifications of angle steel are required. Therefore, butt joint of two different specifications of angle steel is required.

[0003] Traditional butt joint of angle steel requires bevel joint, and a section of angle steel needs to be welded to the back for strengthening after bevel joint. This process is very tedious, requires a large amount of manpower and time for scribing and cutting, and the processing efficiency of the profile is not high. In addition, the precision and quality cannot be guaranteed. SUMMARY

[0004] The purpose of the present application is to provide a method for butt joint of angle steel with improved efficiency.

[0005] In order to achieve the above-mentioned purpose of the application, the method for butt joint of angle steel adopts the following technical scheme:

[0006] A method for butt joint of angle steel, comprising the following steps:

[0007] (1) selecting a first angle steel and a second angle steel to be butt jointed, the height of the first angle steel being greater than the height of the second angle steel;

[0008] (2) cutting the first angle steel: cutting a V-shaped notch at the upper part of the butt joint end of the first angle steel, the butt joint end of the first angle steel being divided into an upper butt joint end and a lower butt joint end by the V-shaped notch, the lower edge of the upper butt joint end being the upper wall of the V-shaped notch, the upper wall of the V-shaped notch being horizontally arranged, the upper edge of the lower butt joint end being the lower wall of the V-shaped notch, the lower wall of the V-shaped notch being obliquely arranged; cutting the end of the upper butt joint end into a butt joint bevel, the lower edge of the upper butt joint end exceeding the upper edge of the upper butt joint end; vertically cutting the lower butt joint end, the lower edge of the upper butt joint end exceeding the end of the lower butt joint end;

[0009] (3) pressing down the upper butt joint end of the first angle steel, the intersection between the upper wall of the V-shaped notch and the lower wall of the V-shaped notch being the conversion point of the upper butt joint end of the first angle steel, the upper butt joint end being bent around the conversion point after being pressed down; after bending, the first angle steel and the second angle steel are butt jointed in a flat manner, the lower edge of the upper butt joint end of the first angle steel being in contact with the lower wall of the V-shaped notch, the contact position forming a first weld, the butt joint bevel of the upper butt joint end being in the same plane as the end face of the lower butt joint end, the butt joint bevel of the upper butt joint end being in butt joint with the end face of the second angle steel, forming a vertical second weld, the end face of the lower butt joint end being in butt joint with the end face of the second angle steel, forming a vertical third weld;

[0010] (4) welding the first weld, the second weld and the third weld, after welding, the butt joint between the first angle steel and the second angle steel is completed;

[0011] The cutting method of the first angle steel comprises the following steps:

[0012] (101) obtaining H1 and H2: H1 is the height of the first angle steel, with the unit of millimeter; H2 is the height of the second angle steel, with the unit of millimeter;

[0013] (102) obtaining the distance h2 between the conversion point and the upper edge of the upper butt joint end of the first angle steel: h2=t2+r1+10, the unit of h2 is millimeter; the first angle steel comprises a web and a face plate which are perpendicular to each other, t2 is the thickness of the face plate, with the unit of millimeter; r1 is the connecting arc radius of the web and the face plate, with the unit of millimeter;

[0014] (103) obtaining the height h1 of the lower butt joint end and the butt joint surface of the second angle steel: h1=H2-h2-3, the unit of h1 is millimeter;

[0015] (104) obtaining the included angle A of the V-shaped notch: if H1-H2<30, A=ARCTAN((H1-H2) / 120), otherwise, A=14;

[0016] (105) obtaining the distance X1 between the conversion point and the end of the lower butt joint end of the first angle steel: X1=4×(H1-H2), and X1≥120, the unit of X1 is millimeter;

[0017] (106) obtaining the distance Y that the lower edge of the upper butt joint end exceeds the end of the lower butt joint end: Y=X1 / cos(A)-X1-3×tan(A), the unit of Y is millimeter;

[0018] (107) obtaining the distance X2 between the lower edge of the upper butt joint end and the upper edge of the upper butt joint end: X2=(h2-3)×tan(A), the unit of X2 is millimeter;

[0019] (108) inputting the obtained formula or value into an automatic powder spraying and line drawing device, spraying and drawing lines on the first angle steel through the automatic powder spraying and line drawing device to obtain a first cutting line, a second cutting line, a third cutting line and a fourth cutting line; the first cutting line is the upper wall of the V-shaped notch, the second cutting line is the lower wall of the V-shaped notch, the third cutting line is the butt joint inclined surface, and the fourth cutting line is the end edge of the lower butt joint end of the first angle steel;

[0020] (109) cutting along the first cutting line, the second cutting line, the third cutting line and the fourth cutting line, and the first angle steel is cut.

[0021] Preferably, the automatic powder spraying and line drawing device is an ink marking and line drawing code machine.

[0022] Preferably, the first angle steel is L-shaped steel.

[0023] Preferably, the second angle steel is L-shaped steel.

[0024] Preferably, the V-shaped notch is cut close to the position of the panel.

[0025] Compared with the prior art, the present application has the beneficial effects that:

[0026] 1. The first angle steel is subjected to V-shaped notch cutting treatment, after cutting, the upper butt joint end of the first angle steel is pressed down, so that the lower edge of the upper butt joint end is in contact with the lower wall of the V-shaped notch, the butt joint inclined surface of the upper butt joint end is in the same plane with the end surface of the lower butt joint end, and is in butt joint with the end surface of the second angle steel, at this time, the first angle steel and the second angle steel realize flush butt joint; after butt joint, other angle steel reinforcing structure strength is not needed to be added, the cost of steel material is saved;

[0027] 2. The formula is calculated and input into the automatic powder spraying and line marking device, the data is processed and line marking is performed by using the automatic powder spraying and line marking device, the cutting line can be simply, efficiently and accurately marked, the labor cost is reduced, the angle steel processing efficiency is improved, at the same time, the error is reduced, the processing and welding precision is improved, and the welding quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Fig. 1 It is a schematic diagram of the first angle steel before butt joint of the present application;

[0029] Fig. 2 It is a butt joint schematic diagram of the first angle steel after the upper butt joint end is pressed down;

[0030] Fig. 3 It is a structural schematic diagram of the first angle steel.

[0031] Among them, 1 is the first angle steel, 1a is a web, 1b is a panel, 2 is the second angle steel, 3 is a conversion point, 4 is an upper butt joint end, 5 is a V-shaped notch, 6 is a butt joint inclined surface, 7 is a first weld, 8 is a second weld, 9 is a third weld, and 10 is a lower butt joint end. DETAILED DESCRIPTION

[0032] The present application will be further illustrated below in conjunction with specific embodiments, which should be understood as merely illustrating the present application and not limiting the scope of the present application, and various equivalent forms of the present application modified by those skilled in the art after reading the present application all fall within the scope defined by the claims attached hereto.

[0033] As shown in the figure, an angle steel butt joint method comprises the following steps: Figs. 1-3

[0034] ​(1) select the first angle steel 1 and the second angle steel 2 to be butt jointed, the specification of the first angle steel 1 is 300x90x10x16, wherein 300 is the web width, 90 is the flange width, 10 is the web thickness, and 16 is the flange thickness, and the unit is millimeter; the specification of the second angle steel 2 is 250x90x10x15;

[0035] (2) cutting the first angle steel 1: cutting a V-shaped notch 5 at the upper part of the butt joint end of the first angle steel 1, the first angle steel 1 comprises a web 1a and a flange 1b perpendicular to each other, the V-shaped notch 5 is cut close to the position of the flange 1b; the butt joint end of the first angle steel 1 is divided into an upper butt joint end 4 and a lower butt joint end 10 through the V-shaped notch 5, the lower edge of the upper butt joint end 4 is the upper wall of the V-shaped notch 5, the upper wall of the V-shaped notch 5 is horizontally arranged, the upper edge of the lower butt joint end 10 is the lower wall of the V-shaped notch 5, and the lower wall of the V-shaped notch 5 is inclinedly arranged; the end of the upper butt joint end 4 is cut into a butt joint inclined surface 6, and the lower edge of the upper butt joint end 4 exceeds the upper edge of the upper butt joint end 4; the lower butt joint end 10 is vertically cut, and the lower edge of the upper butt joint end 4 exceeds the end of the lower butt joint end 10;

[0036] (3) pressing the upper butt joint end 4 of the first angle steel 1, the intersection between the upper wall of the V-shaped notch 5 and the lower wall of the V-shaped notch 5 is the conversion point 3 of the upper butt joint end 4 of the first angle steel 1, and the upper butt joint end 4 is bent with the conversion point 3 as the center after being pressed; after being bent, the first angle steel 1 and the second angle steel 2 are flush butt jointed, the lower edge of the upper butt joint end 4 of the first angle steel 1 is in contact with the lower wall of the V-shaped notch 5, the contact position forms a first weld 7, the butt joint inclined surface 6 of the upper butt joint end 4 is in the same plane as the end surface of the lower butt joint end 10, the butt joint inclined surface 6 of the upper butt joint end 4 is butt jointed with the end surface of the second angle steel 2, forming a vertical second weld 8, and the end surface of the lower butt joint end 10 is butt jointed with the end surface of the second angle steel 2, forming a vertical third weld 9;

[0037] (4) welding the first weld 7, the second weld 8 and the third weld 9, and the butt joint between the first angle steel 1 and the second angle steel 2 is completed after welding;

[0038] The cutting method of the first angle steel 1 comprises the following steps:

[0039] (101) obtaining H1 and H2: H1 is the height of the first angle steel, that is, the width of the web of the first angle steel, and H2 is the height of the second angle steel, that is, the width of the web of the second angle steel, so H1=300 mm and H2=250 mm;

[0040] (102) obtaining the distance h2 between the conversion point 3 and the upper edge of the upper butt joint end 4 of the first angle steel 1: h2=16+19+10, h2=45 mm;

[0041] (103) Obtain the height h1 of the lower butt joint end 10 and the butt joint surface of the second angle steel: h1=250-45-3, h1=202 mm;

[0042] (104) Obtain the included angle A of the V-shaped notch 5: 300-250>30, so A=14;

[0043] (105) Obtain the distance X1 between the conversion point 3 and the end of the lower butt joint end 10 of the first angle steel 1: X1=4*(300-250), X1=200 mm;

[0044] (106) Obtain the distance Y that the lower edge of the upper butt joint end 4 exceeds the end of the lower butt joint end 10: Y=200 / cos(14)-200-3*tan(14), Y=5 mm;

[0045] (107) Obtain the distance X2 that the lower edge of the upper butt joint end 4 exceeds the upper edge of the upper butt joint end 4: X2=(45-3)*tan(14), X2=11 mm;

[0046] (108) Input the formula or value obtained in the above steps into the automatic powder spraying and line drawing equipment, which is an ink marking and line drawing code marking machine, to spray and draw lines on the first angle steel through the automatic powder spraying and line drawing equipment, to obtain the first cutting line, the second cutting line, the third cutting line and the fourth cutting line; the first cutting line is the upper wall of the V-shaped notch 5, the second cutting line is the lower wall of the V-shaped notch 5, the third cutting line is the butt joint inclined surface 6, and the fourth cutting line is the end edge of the lower butt joint end 10 of the first angle steel 1;

[0047] (109) Cut along the first cutting line, the second cutting line, the third cutting line and the fourth cutting line, and the first angle steel is cut.

[0048] The specific working process and principle of the present application: the present application cuts the first angle steel to form a V-shaped notch, after cutting, the upper butt joint end of the first angle steel is pressed down, so that the lower edge of the upper butt joint end is in contact with the lower wall of the V-shaped notch, the butt joint inclined surface of the upper butt joint end is in the same plane with the end surface of the lower butt joint end, and is in butt joint with the end surface of the second angle steel, at this time, the first angle steel and the second angle steel are in flush butt joint; the position where the lower edge of the upper butt joint end is in contact with the lower wall of the V-shaped notch forms a first weld, the position where the butt joint inclined surface of the upper butt joint end is in butt joint with the end surface of the second angle steel forms a vertical second weld, and the position where the end surface of the lower butt joint end is in butt joint with the end surface of the second angle steel forms a vertical third weld, only the first weld, the second weld and the third weld need to be welded during welding, and after welding, no other angle steel needs to be added on the back to improve the structural strength; the present application processes data and draws lines by using the automatic powder spraying and line drawing equipment, which can simply, efficiently and accurately draw cutting lines, reduces labor cost, improves angle steel processing efficiency, at the same time, reduces error, improves processing and welding precision, and improves welding quality.

Claims

1. A method of butt joining angle irons, characterized in that The method comprises the following steps: (1) selecting a first angle steel and a second angle steel to be butt-jointed, the height of the first angle steel being greater than the height of the second angle steel; (2) cutting the first angle steel: cutting a V-shaped notch at the upper part of the butt-joint end of the first angle steel, the butt-joint end being divided into an upper butt-joint end and a lower butt-joint end through the V-shaped notch, the lower edge of the upper butt-joint end being the upper wall of the V-shaped notch, the upper wall of the V-shaped notch being horizontally arranged, the upper edge of the lower butt-joint end being the lower wall of the V-shaped notch, the lower wall of the V-shaped notch being obliquely arranged; cutting the end of the upper butt-joint end into a butt-joint inclined surface, the lower edge of the upper butt-joint end exceeding the upper edge of the upper butt-joint end; vertically cutting the lower butt-joint end, the lower edge of the upper butt-joint end exceeding the end of the lower butt-joint end; (3) pressing down the upper butt-joint end of the first angle steel, the intersection between the upper wall of the V-shaped notch and the lower wall of the V-shaped notch being the conversion point of the upper butt-joint end of the first angle steel, the upper butt-joint end being bent with the conversion point as the center after being pressed down; after being bent, the first angle steel and the second angle steel are butt-jointed in a flush manner, the lower edge of the upper butt-joint end of the first angle steel being in contact with the lower wall of the V-shaped notch, a first weld being formed at the contact position, the butt-joint inclined surface of the upper butt-joint end being in the same plane as the end surface of the lower butt-joint end, the butt-joint inclined surface of the upper butt-joint end being butt-jointed with the end surface of the second angle steel, a second weld being formed in a vertical manner, the end surface of the lower butt-joint end being butt-jointed with the end surface of the second angle steel, a third weld being formed in a vertical manner; (4) welding the first weld, the second weld and the third weld, butt joint between the first angle steel and the second angle steel being completed after welding; The cutting method of the first angle steel comprises the following steps: (101) obtaining H1 and H2: H1 is the height of the first angle steel, with the unit of millimeter; H2 is the height of the second angle steel, with the unit of millimeter; (102) obtaining the distance h2 between the conversion point and the upper edge of the upper butt-joint end of the first angle steel: h2=t2+r1+10, the unit of h2 being millimeter; the first angle steel comprises a web and a face plate which are perpendicular to each other, t2 is the thickness of the face plate, with the unit of millimeter; r1 is the connecting arc radius of the web and the face plate, with the unit of millimeter; (103) obtaining the height h1 of the lower butt-joint end and the butt-joint surface of the second angle steel: h1=H2-h2-3, the unit of h1 being millimeter; (104) obtaining the included angle A of the V-shaped notch: if H1-H2<30, A=ARCTAN((H1-H2) / 120), otherwise, A=14; (105) obtaining the distance X1 between the conversion point and the end of the lower butt-joint end: X1=4×(H1-H2), and X1≥120, the unit of X1 being millimeter; (106) obtaining the distance Y by which the lower edge of the upper butt-joint end exceeds the end of the lower butt-joint end: Y=X1 / cos(A)-X1-3×tan(A), the unit of Y being millimeter; (107) obtaining the distance X2 between the lower edge of the upper butt-joint end and the upper edge of the upper butt-joint end: X2=(h2-3)×tan(A), the unit of X2 being millimeter; (108) input the obtained formula or numerical value into the automatic powder spraying and scribing device, spray and scribe the first angle steel through the automatic powder spraying and scribing device to obtain a first cutting line, a second cutting line, a third cutting line and a fourth cutting line; the first cutting line is an upper wall of the V-shaped notch, the second cutting line is a lower wall of the V-shaped notch, the third cutting line is a butt joint inclined surface, and the fourth cutting line is an end edge of the lower butt joint end of the first angle steel; (109) cutting is performed along the first cutting line, the second cutting line, the third cutting line and the fourth cutting line, and the first angle steel is cut.

2. The method of butt joining angle irons of claim 1, wherein: The automatic powder spraying and scribing device is a printing and scribing inkjet printer.

3. The method of butt joining angle irons of claim 1, wherein: The first angle steel is an L-shaped steel.

4. The method of butt joining angle irons of claim 1, wherein: The second angle steel is an L-shaped steel.

5. The method of butt joining angle irons of claim 3, wherein: The V-shaped notch is cut close to the position of the panel.

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