How to bend the bridge How to bend the bridge S

1. The cable tray only needs to bend the bottom edge length (bottom hypotenuse) after the bending of the cable tray and the width of the bridge, but the range is controlled at 100 400mm, and the formula of the 30-degree up and down climbing elbow is the size x = multiplied by the side height, calculate the size and draw the line, and draw the line first to the front to the bottom and then to the back.

2. After drawing the upper bending line, cut it with a hand grinder, and make it clear that if there is cutting, it will be merged after cutting. Make the vertical line of the edge of the bridge, draw a 45-degree angle with the vertical line as the center, repeat the above action after 400mm, cut along the line, and weld the forming.

3. After cutting the upper bend, the next step is to calculate the size of the hypotenuse of the horizontal bend: 2 times the climbing size is equal to the size of the hypotenuse.

1. The electrode should be kept dry when used, the titanium calcium type should be dried at 150 for 1 hour, and the low-hydrogen type should be dried at 200-250 for 1 hour (it cannot be repeated for many times, otherwise the coating is easy to crack and peel off), so as to prevent the electrode coating from sticking to oil and other dirt, so as not to increase the carbon content of the weld and affect the quality of the weldment.

When the elbow is welded, it is subjected to repeated heating and precipitates carbides, which reduces corrosion resistance and mechanical properties.

After welding, the hardening is large and it is easy to crack. If the same type of electrode welding is used, it must be preheated at more than 300 meters and slowly cooled at about 700 meters after welding. If the weldment cannot be heat treated after welding, chromium nickel should be used.

Stainless steel electrodes.

2. In order to improve the corrosion resistance and weldability of stainless steel elbows, appropriately increase the appropriate amount of stability elements Ti, NB, Mo, etc., and the weldability is better, when using the same type of chromium stainless steel electrode, more than 200 preheating and about 800 tempering treatment after welding. If the weldment cannot be heat-treated, a chromium-nickel stainless steel electrode should be used.

1. The practice is as follows:

1. The length of the bottom edge (bottom hypotenuse) after the bending of the bridge can be the same length as the width of the bridge, but the range is controlled at 100 400mm.

2. Select two points of this length, draw two vertical lines relative to the bottom edge on the side of the bridge, and select the bending direction of the bridge as the cutting opening side.

3. Select the open side as the bottom edge, and draw the two vertical lines as the middle line of the two isosceles triangles, and the formula for determining the length of the bottom edge of the isosceles triangle is l 2 (bridge height.

Second, a cable tray horizontal 90 degree elbow production method, it is characterized in that: the bottom plate of a section of bridge in the middle is cut into an isosceles trapezoid, and the two sides of the bridge that are connected with the isosceles trapezoidal bottom plate are rectangular, and then the bridge at both ends is interchangeable, and a section of bridge in the middle is docked respectively, and finally welded and fixed.

The two ends of the bridge are cut symmetrically with oxygen welding"v"Font notch, will"v"On the folding seam point at the cutting edge, it is determined according to the needs of the bending degree"v"type angle, the general cable requires a bending radius of more than 500mm.

The bridge can't be welded with oxygen, it can only be cut with a grinder, and you're also engaged in those things?

Brother, just keep in mind the right angle trigonometric function, the bridge can bend as much as you want, if you can memorize any angle trigonometric function, then you can bend what you can't think of.

Take the bottom of the bridge from the side of the bridge and draw a point to divide this distance equally, then the three points are connected to form a 45 ° isosceles triangle (the other side uses the same method), and then this triangle is cut off to form a 45 ° bend, and then the height to be done is the innermost vertex to draw a triangle again, the direction is opposite to the previous one, and it is a 45 ° zigzag bend.

90° bend is to take 2 times the side to draw a triangle, for example, 400x150 to do a horizontal elbow, then take 400x2 to draw a triangle to cut off, if you want to do a vertical elbow, take 150x2.

Precautions for the construction of bridge S bend.

For the special shape bridge, the size measured on site is handed over to the material supplier, and the supplier will make it according to the size to reduce on-site processing. The material, model, thickness and accessories of the bridge meet the design requirements.

Before the installation of the bridge, it is necessary to coordinate with various specialties to avoid conflicts with large-diameter fire pipes, sprinkler pipes, hot and cold water pipes, drainage pipes, air conditioning and exhaust equipment.

The bridge is lifted to a predetermined position, and the bracket is bolted to fix, the size needs to be carefully checked at the turn, the bridge should be consistent with the slope of the building, and the arc of the bridge on the wall of the arc-shaped building should be consistent with the building. The bridge and the bridge are connected with a connecting plate, and the connecting bolt adopts a semi-circular head bolt, and the semi-circular head is on the inner side of the bridge. The gaps between the bridges must meet the design requirements to ensure that the bridges of a system are connected.

For 100*100 bridges, making a 45° right bend is cutting off 4 cm on the side of the midline, and you do a 45° left bend, isn't that called an S bend... Of course, there are any curvatures other than 45°

Horizontal bend of the bridge 30 procedure.

Bridge horizontal bend 30 practice 1, bridge 30 degrees of calculation formula: 30 ° horizontal elbow practice: tan15 ° = a 400 a = tan 15 ° x width = width (mm) bottom edge 2a = width (mm) 2 = width (mm) 2, due to the change of ambient temperature, the steel cable tray will appear thermal expansion and cold contraction.

The outdoor tray is greatly affected by temperature, for example, the maximum temperature of the environment is 40, and the lowest temperature is -20, the maximum shrinkage of the cable tray is obtained by the following formula: δt = 10-6 60deg (degree) 1000mm, so it is concluded that the temperature difference is 60 for the laughing ridge, the temperature difference for the δ is 50, and the temperature difference for δ is 40, δ the straight section of the cable tray in the engineering design should consider the expansion joint, and the spacing of the expansion joint is recommended to be determined as follows

When the temperature difference is 40, it is 50m; When the temperature difference is 50m, it is 40m. This three-line distance with bridge = side height * coefficient 30° x 45° x 60° x 1 90° cut two 45° horizontal bends at the bottom.

How to do 100 50 bridge bend?

Hello dear! How to do 100 50 bridge bend? 1. The length of the bottom edge of the bent bridge (the hypotenuse of the bottom reserve punching skin) can be the same length as the width of the bridge, but the range is controlled at 100 Select the two points of this length, draw two vertical lines relative to the bottom edge on the side of the bridge, and select the bending direction of the bridge as the cutting opening side.

3. Select the opening side as the bottom edge, and draw the two vertical lines respectively to imitate the difference between the two isosceles triangle and the middle line of the isosceles triangle, and the formula for determining the length of the bottom edge of the isosceles triangle is l 2 (bridge height. Hope it helps!

Hello, glad to answer 1The joints of self-made cable tray elbows, jump bends, and tees should be spot welded and fixed on the inside and the burr skin should be polished clean, and the outer side should be smooth, and the gap should be as small as possible and the saw edge should be smooth and neat. 2.

There is no wrong edge in the elbow butt of the cable tray, and the counterpart after welding should be polished smooth and smooth, and there should be no burrs, sharp edges and other edges and corners that damage the cable insulation layer. 3.When adding steel bars in the tray cable tray, add 6-8mm round steel, and paint should be painted on the inside and outside.

Before painting, the coating and welding slag should be cleaned up. 4.After the installation of the self-made tee and elbow of the multi-layer cable tray is completed, the corner should be in the vertical unified straight line.

5.After all the self-made elbows are made, they should be brushed with anti-rust paint at the cutting, grinding and welding places, and then brushed with the same color as the bridge topcoat.

How to do the bridge elbow pro! Hello, I am glad to answer for you<> the practice of pro-bridge elbow is that in the process of cable tray installation, there are generally three kinds of elbows: one is horizontal bending, one is vertical up and down bending, and one is "zigzag" bending.

The following examples illustrate the production methods and formulas of these elbows: 1. For example: the 400x150 bridge does a 45 ° "zigzag" bend from the side of the bridge to draw a point at the bottom of the bridge to divide this distance equally, and then the three points are connected to form a 45 ° isosceles triangle (the other side uses the same method), and then the triangle is cut off to form a 45 ° bend, and then the height to be done is to draw a triangle for the innermost vertex, the direction is opposite to the previous one, and it is a 45 ° zigzag bendThe bend is to draw a triangle twice the side to be made, for example, 400x150 to make a horizontal elbow, then take 400x2 to draw a triangle to cut off, if you want to do a vertical elbow, take 150x2.

Summing up the formula: for example, a 45-degree slope elbow, you just need to remember this sentence to know how to do it: "Climb 45 degrees, bridge height multiplied by three lines for a bend, hypotenuse is the climbing height multiplied by 30 degrees is the bridge height multiplied by 45 times 30 divided into three lines for a bend, hypotenuse is the climbing height multiplied by 2 horizontal 90 degree bend is the width of the bridge multiplied by the middle line, hypotenuse (inside) 600 or more 200 times 600 times 100 times below. Hope mine can help you <>

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