Formula for calculating the tensile strength of wire rope.

According to the need to buy the corresponding tensile strength level, such as 1770MPa strength level, as for the wire rope breaking tensile force, you can find it directly from the national standard, no need to calculate, GB8918-2006 important use wire rope, first find the wire rope structure, then find the diameter, and then find the lowest breaking tensile force.

The commonly used wire ropes for lifting equipment include phosphate coated wire rope, galvanized steel wire rope and stainless steel wire rope, which are used in atmospheric environments, and the manganese phosphate coated wire rope produced by patented technology has the longest service life, and the hot-dip galvanized - phosphating double-coated wire rope is preferred in heavy corrosive environments.

The phosphate coated wire rope produced by the patented technology gives priority to the use of manganese or zinc-manganese phosphating, compared with the smooth wire rope production process, only the final wear-resistant phosphating treatment process is added, and the wear resistance and corrosion resistance of the rope wire are greatly improved, and the phosphated steel wire is used to directly twist the wire rope. At present, the fatigue test data show that the fatigue life of phosphate-coated wire rope is about 3-4 times that of the same structure smooth wire rope (under comparable conditions in the laboratory). Manganese phosphating is wear-resistant phosphating, which can solve the problem of wear and tear in the use of wire rope, according to the current situation of the wire rope market, the ** of manganese phosphating coated wire rope is higher than that of smooth wire rope, and the service life extension is much higher than the growth rate of **, therefore, the average daily use cost of phosphating coated wire rope is only 30-40% of the smooth wire rope, the use cost is lower, the cost is higher, and the smooth wire rope is being eliminated.

The main types of wire ropes in the domestic market:

1.Phosphate coated wire rope (Chinese patent), the steel wire is phosphated by manganese or zinc-manganese, the surface of the steel wire is very wear-resistant, effectively inhibiting the occurrence of fretting wear, is the upgraded product of the smooth wire rope, the service life in the atmospheric environment far exceeds the smooth wire rope of the same structure, including the imported smooth wire rope (the current fatigue life of the phosphate rope is about three times that of the smooth rope, and in the future, with the in-depth research on the wear-resistant phosphate liquid, it may be greatly improved, and the fatigue life can be compared through the fatigue test. Phosphate film 3-60 grams m2, the steel wire is not drawn after phosphating, and the wire rope is directly twisted, note - can not be confused with the phosphating of the rope wire with the drawing of the rope phosphating), foreign countries have been in the cottage China's phosphate coating wire rope innovation technology.

2.Galvanized steel wire rope, including hot-dip galvanizing and electro-galvanizing, straight-up hot-dip galvanized steel wire has a thicker zinc layer, the thicker the zinc layer, the stronger the corrosion resistance, the longer the use time, and the electro-galvanized is thinner. Due to the certain anti-corrosion performance of the phosphate coating, the manganese phosphate coating wire rope can be used instead of some varieties of galvanized steel wire rope with thin zinc layer, such as the B-grade galvanized layer in GB8918-2006 important purpose steel wire rope.

3.Stainless steel wire rope, the use of stainless steel wire twisted wire rope, such as 304 or 316 stainless steel, ** relatively expensive, the stainless steel wire with manganese phosphating coating treatment (stainless steel wire phosphating requires a special phosphating formula), can also greatly extend the service life.

4.Plastic-coated wire rope, on the basis of high-quality carbon wire rope, the outer layer of the wire rope or strand rope is coated with polyethylene or polypropylene.

5.Smooth wire rope, the British began production in 1834, Tianjin No. 1 Wire Rope Factory began to produce and use in China in 1939, with the phosphate coated wire rope entering the market in large quantities, will be phosphated coated wire rope completely eliminated.

GB8918-2006 National Standard for Important Purpose Wire Rope, GB8919-2006 Rope Wire Standard, the corresponding wire tensile strength grade in the above two standards, the wire rope strand split wire tensile test data can meet the requirements, for reference only.

Summary. Formula for calculating the load of the wire rope:

s=10d (safety factor is 5) where:

s - indicates the allowable force of the wire rope, unit: kg

D - represents the diameter of the wire rope, the unit is mm.

For example, a wire rope with a diameter of 15mm is allowed to bear a large load during hoisting operations.

Solution: d 15, s (allowable load) 10 15 10 225 2250kg

Formula for calculating the bearing capacity of wire rope.

The formula for calculating the load of the wire rope: s=10d (the safety factor is taken as 5) where: s——means that the wire rope is allowed to be stressed, unit:

kgd - indicates the diameter of the steel wire scattered rope, the unit is mm. For example, a wire rope with a diameter of 15mm is allowed to bear how much punching limb load is allowed to bear during hoisting operations. Solution:

d 15, s (permissible load) 10 15 10 225 2250kg

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Hello dear! Let me answer for you: the formula for calculating the breaking tensile force of the wire rope is:

Rope Diameter, Rope Diameter, Tensile Strength, Breaking Factor. For example: 6*29Fi+ 1960MPa breaking tensile force is rope diameter Rope diameter Tensile strength Breaking coefficient = (equivalent to tons *19W+FC, 6*19S+FC, 6*25FI+FC, 6*31WS+FC, 6*26WS+FC, 6*36WS+FC, 6*37S+FC hemp core coefficients, steel core IWR *7+FC, 18*19+FC hemp core coefficients are, steel core IWS or IWR coefficients are W*7 coefficient * The coefficient of 19S+NF hemp core series is, and the coefficient of steel core is.

The breaking tensile data of the wire rope plays a great role in the daily use of the wire rope, and there is a specified tensile coefficient for each structure and each specification of the wire rope. It should be inspected before use. <>

The tensile force calculation formula of wire rope is: f0 = k * d2 * r0 1000

In conventional engineering construction, the most commonly used is the wire rope of 6 19 and 6 37 structures. 6 19 is relatively hard, monofilament is thicker, generally used as wave wind rope, pull wire; 6 37 is softer, the monofilament is thinner, generally used as a grinding rope, winch rope, need to pass through the pulley bending angle is relatively large.

Scrapping standards for wire rope slings:

1. The wire rope is broken by 1 strand, or the surface steel wire is abrasive to more than 40% of the wire diameter, or the wire rope diameter is reduced by more than 7%.

2. The wire rope is kinked and deformed.

3. The wire rope exceeds the standard in a twist distance (Appendix 9) :(1) When the broken wire phenomenon occurs locally, and the broken wire occurs in a section with a length of 6 times the diameter, it should be scrapped when it reaches half of the number of broken wires. (2) When the wire rope is corroded or worn, the base number of scrapped broken wire holes should be multiplied by the reduction factor (Appendix 9).

4. The broken wire rope can be partially damaged (there are more than three broken wires gathered together).

5. Broken wires appear on the surface of the cable eye, or the broken wires are concentrated in the metal sleeve, near the plugging place, and in the connecting rope strands.

6. The strength of the wire rope is reduced due to the burning of the wire rope, the scalding of molten metal, or the long-term exposure to high temperature caused by the wire rope arc.

7. The plugging joint is seriously squeezed and worn; Metal casing damage (e.g., cracks, severe deformation, corrosion) or diameter reduction to 95% of the original diameter.

8. The metal sleeve fixed connection at the end of the rope or the connecting part of the insertion and trembling eggplant slides out.

The square of the diameter of the wire rope (mm) multiplied by 50 is equal to the breaking rough lifting tensile force.

The breaking tension of lifting and hoisting wire rope is calculated by multiplying the square of the wire rope diameter (mm) by 50 equal to the breaking tension (kg).

How to choose the right wire rope correctly:

The correct selection of the wire rope directly affects the service life of the wire rope, and a little carelessness will also cause serious quality accidents and safety accidents. According to the survey, unreasonable selection of wire rope, untimely repair and maintenance in the later stage, and improper selection of technical parameters of wire rope are the most common accidents in the use of wire rope.

1. The breaking tension of the wire rope.

Under the condition that the diameter and tensile strength of the wire rope remain the same, the wire rope with higher metal density is safer.

2. Abrasion resistance.

Different types of wire ropes have different wear resistance, among which the wear resistance of the sealing rope is the best, followed by the heterosexual strand rope, and the multi-strand rope and round strand rope are poor. This does not mean that multi-strand rope and round strand rope are not practical, but we should choose the most suitable wire rope for more practical conditions.

3. Flexibility.

When the diameter of the wire rope is the same, the more the number of wires, the better the flexibility.

In addition, extrusion resistance, corrosion resistance, fatigue resistance, structural elongation and elastic modulus are also factors that should be considered in the selection of wire rope. <>

Summary. Dear, I am glad to answer for you: how to calculate the tensile strength of steel wireA:

The formula for calculating the tensile strength of steel wire: =FB SO During the tensile process, the maximum force (fb) of the material in the yield stage decreases significantly with the cross-sectional dimensions of the yield stage and the strengthening stage. The stress ( ) obtained by dividing the original cross-sectional area (SO) of the specimen is called tensile strength or strength limit (b) and is measured in n mm (MPa).

It indicates the maximum ability of a metal material to resist damage under tensile force. For brittle and plastic materials with non-forming necking, the maximum tensile load is the breaking load, so the tensile strength also represents the resistance to break. For plastic materials with necking, tensile strength represents the resistance to maximum deformation and ultimate bearing capacity under static tension.

For parts such as wire ropes, tensile strength is a more meaningful performance indicator. Tensile strength measurement is simple and reproducible. It is related to other mechanical properties such as fatigue limit and hardness.

Therefore, it is also used as one of the conventional material mechanical properties to evaluate product quality and process specifications.

Hello, I have kept you waiting for a long time, and I am consulting the answers to your questions, please be patient Dear, I am glad to answer for you: how to calculate the tensile strength of steel wire A: The calculation formula of tensile strength of steel wire:

During the tensile process of FB SO specimens, the maximum force (Fb) of the material in the yield stage decreases significantly with the cross-sectional dimensions of the yield number stage and the strengthening stage. The stress ( ) obtained by dividing the original cross-sectional area (SO) of the specimen is called tensile strength or strength limit (b) and is measured in n mm (MPa). It indicates the maximum ability of a metal material to resist damage under tensile force.

For brittle and plastic materials with non-forming necking, the maximum tensile load is the breaking load, so the tensile strength also represents the resistance to break. For plastic materials with necking, tensile strength represents the resistance to maximum deformation and ultimate bearing capacity under static tension. For parts such as wire ropes, tensile strength is a more meaningful performance indicator.

Tensile strength measurement is simple and reproducible. It has a certain relationship with other mechanical properties such as fatigue limit and hardness. Therefore, it is also used as one of the conventional material mechanics performance to evaluate product quality and process specifications.

Summary. Pro, the formula for calculating the load of the wire rope:

s=10d (The safety factor is 5.)

Calculation formula for the load-bearing of wire rope.

Pro, the formula for calculating the load of the wire rope: s=10d (the safety factor takes 5s to represent the allowable force of the wire rope, unit: kgd represents the diameter of the wire rope, and the unit is mm.)

For example, a wire rope with a diameter of 15mm is allowed to bear the load during hoisting operations. Solution: d 15, s (allowable load) 10 15 10 225 2250kg