### The aluminum pipe must be cut without waste. Why is it dangerous to cut aluminum with a corner grinder

## Verification work 2 (differentiated)

one. Prove that the numbers 695 and 2907 are composite.

Lay out on simple multipliers of the number:

Write down all the dividers of the number 33. Emphasize those of them that are simple numbers.

four. Can the difference in two simple numbers be a simple number? Confirm the answer with an example.

one. What are all the numbers that you can replace the asterisk so that this number is:

Write down all the dividers of the number 52. Emphasize those of them that are simple numbers.

four. Can the difference in two components be a simple number? Explain the answer.

b) the sums of three different composite numbers.

Lay out on simple multipliers of the number:

Write down all the dividers of the number 189. Emphasize those of them that are simple numbers.

four. Number A when dividing by 35 gives the remainder 14. Prove that A is a composite number.

one. Prove that the numbers 832 and 7053 are composite.

Lay out on simple multipliers of the number:

Write down all the dividers of the number 35. Emphasize those of them that are simple numbers.

four. Can the sum of two prime numbers be a simple number? Confirm the answer with an example.

one. What are all the numbers that you can replace the asterisk so that this number is:

Write down all the divisors of the number 44. Emphasize those of them that are simple numbers.

four. Can the sum of the two components be a simple number? Explain the answer.

b) the sums of three different composite numbers.

Lay out on simple multipliers of the number:

Write down all the dividers of the number 104. Emphasize those of them that are simple numbers.

four. Number A when dividing by 21 gives the remainder 6. Prove that A is a composite number.

one. Find the largest common divider of numbers:

Find the smallest common multiple numbers:

The aluminum **pipe** must be cut without **waste** into equal parts.

a) what the smallest length should have a **pipe** so that it can be cut both on a part of 6 m long and on a part of 8m long?

b) on the parts of which the largest length can be cut two pipes 35m and 42m long?

four. Find out if they are mutually simple numbers 1008 and 1225.

one. Find the largest common divider of numbers:

Find the smallest common multiple numbers:

A batch of recorded video tapes must be packaged and sent to the store.

a) how many cassettes can be packaged without a residue both in boxes of 60 pieces, and in boxes of 45 pieces, if the total cassette is less than 200?

b) what is the largest number of stores in which you can equally distribute 24 comedies and 20 fantasy? How many films of each genre will receive one store at the same time?

four. From numbers 33; 105; 128 Select all pairs of mutually simple numbers.

one. Find the largest common divider of numbers:

Find the smallest common multiple numbers:

b) the three smallest two.digit numbers, multiple 5.

Come up with a composite number that would be mutually simple with each of the numbers 34; 77; 195.

one. Find the largest common divider of numbers:

Find the smallest common multiple numbers:

The notebooks brought to the school must be equally distributed without a trace between the students.

a) What is the largest number of students between whom you can distribute 112 traders in a cage and 140 notebooks in a ruler?

b) what the smallest number of notebooks can be distributed between 25 students and between 30 students?

four. Find out if they are mutually simple numbers 1584 and 2695.

one. Find the largest common divider of numbers:

Find the smallest common multiple numbers:

The agricultural firm produces vegetable oil and for sending the consumer it pours it into cans.

a) how many liters of oil can be poured without a residue both in 10-liter bidones and in 12-liter cans, if less than 100 liters are produced in a day?

b) what is the largest number of stores in which you can equally distribute 60l sunflower and 48l corn oil? How many liters of oil of each species will receive one store at the same time?

four. From numbers 40; 175; 243 Select all pairs of mutually simple numbers.

one. Find the largest common divider of numbers:

Find the smallest common multiple numbers:

a) 21 and 176; b) the three smallest two.digit numbers, multiple 9.

Come up with a composite number that would be mutually simple with each of the numbers 39; 85; fifteen

## Kryazuvka for metal

When decorating buildings during the construction of specialists, a end saw helps out, with which you can cut a sheet of metal. However, the use of power tools is not always appropriate. For a gentle approach, a manual device is chosen like a simple and reliable hacksaw for metal.

There are special canvases designed for a cut of soft and non.ferrous metals source farpost.ru

Cutting aluminum sheets that do not have a large cross section has several drawbacks, namely:

- an uncomfortable work format during which the specialist is forced to simultaneously fix the profile and perform movements. Because of this, the quality of the product is reduced;
- In the process of cutting, the material loses its original form;
- manual processing takes more time than machine.

From the advantages of the use of hacksaw, the following are distinguished:

- A simple principle of operation is available in the development of even an inexperienced specialist;
- The light weight of the product provides the use of manual labor for a long time;
- the possibility of use in any situations;
- Despite the increase in time spent, the productivity of aluminum processing is at the level of some power tools.

## Scissors for metal

The tool is characterized by convenience and ease of working with aluminum. Metal sheets are pre.marked.

- the need for training before the chill of a sharp metal. A person without experience will not perform an action along the marking lines;
- Due to the features of the structure of the profile, the probability of deformation of the product or the implementation of uneven cuts is high.

There are special scissors for aluminum, but they are not suitable for cutting profiles, it is worth giving preference to the classic version of Artem-Tools source.ru

## Industrial cutting of **aluminum** profile

Plasmical equipment for cutting aluminum profile allows you to get the perfect quality of cutting. For processing **aluminum**, a plasma cutter should be chosen as plasma.forming gases of hydrogen, argon, or nitrogen. inactive gases.

Laser cutting of metal. Fry of metal powder painting metal welding work

Active gases (oxygen, air) are used for plasma cutting of ferrous metal.

Compressed air is also applicable for cutting aluminum blanks, but only if they are not thicker than 70 mm. The nitrogen-argon mixture for cutting **aluminum** is not suitable.

Cutting aluminum using pure nitrogen is quite acceptable if the workpiece is not thicker than 20 mm. To cut aluminum blanks, the thickness of which reaches 100 mm, a mixture of nitrogen with hydrogen will be required.

A mixture of an argon with hydrogen is optimal for working with aluminum, it is suitable for cutting aluminum blanks of significant thickness. over 100 mm. For the stability of the plasma arc, mixtures with M hydrogen are not higher than 20 % should be used.

Hydrobrazive equipment for cutting an aluminum profile allows you to get products with a high.quality cut and medium indicators of roughness of the edge.

Metal loss when using this technology is minimal. Hydroabrasive cutting is not accompanied by heating of the workpiece, it is a fire and explosion-proof.

Cutting occurs due to the exposure of a narrowly directed stream of water under high pressure. Abrasive grains are added to the water, the composition and value of which can be different depending on the parameters of the processed material and the conditions of work.

Hydroabrizative technology allows you to cut metal up to 300 mm thick. It is possible to cut a whole stack of thin sheets of metal at once.

With the help of hydro.carbrane cutting of an aluminum profile, you can get parts of a complex shape, cutting them out with high accuracy. So it is possible to qualitatively perform even such difficult operations as the formation of bevels, internal radii and even sharp corners.

Hydroabraseic cutting is safe for the environment, since during operation there is no formation of harmful chemicals and microparticles that clog air. For processing large quantities of the profile, a hydro.carbraise machine with numerical control (CNC) is used. The operator only looks after the equipment that independently cuts the aluminum profile in a given mode, according to the established program.

Guillotine is a blacksmith-press installation. There are three options for such attitudes: guillotics working in manual, mechanical and hydraulic regime.

Mechanical guillotine functions according to the principle of a kinematic chain, and hydraulic. using a working fluid.

Hand guillotines make it possible to easily cut thin **aluminum** sheets with a lever-spring mechanism.

Mechanical guillotics are connected to the power source.

This kind of device is used when when processing metals (including **aluminum**), high accuracy is not required, since cutting on mechanical guillotics allows deviations of 2 mm or more.

Only stationary hydraulic guillotines equipped with the rear ruler provide a very accurate incision.

As a result of replacing hydraulic guillotines engines more powerful and modern analogues, installations are created that can cut aluminum almost any thickness.

## Aluminum profile cutting nuances on a CNC machine

The processing of aluminum on CNC machines ensures the production of high.quality parts used in aircraft industry in the production of military and space equipment. In recent years, many compact, relatively inexpensive models have appeared, they can be found in car repair shops. “Hobbie” CNC machines have become popular among creators of models. Independently making rare details, models pay for the cost of equipment.

The unique properties of aluminum are well known:

- ease in combination with strength;
- corrosion resistance;
- low thermal conductivity (hence the demand in shipbuilding);
- high electrical conductivity;
- low price.

### Grinding and Cutting Aluminum with @weilerabrasives || FABTECH 2019

When processing an **aluminum** profile on a CNC machine, it is extremely important to choose the right cutting mode, otherwise the cutting tool will quickly fail. In addition, **aluminum** shavings sticks to the cutting surface, clogs the openings and grooves of the tool, which also leads to its rapid wear.

We give 10 important rules for processing **aluminum** on the CNC machine.

### WIKISPEED Demo cutting aluminum plate with an angle grinder

Following them, you can achieve the best results, as well as save equipment:

- You need to work slowly. Choose cutting mode, focusing on both the character of the machine and the end tool, and on the dimensions of the parts.
- Find on the Internet and constantly use feeding and cutting speed calculators, determine the lower limit of the number of revolutions per minute, take into account the features of the mills of different types.
- The calculation should take into account the strength of the workpiece for bending, refinement of the chips, different options for operating modes.
- Use milling mills with titanium dioboride coating. They are wear.resistant and designed to work at high speed. The coating eliminates the sticking of chips and heating. You will not have to regret the money spent on an expensive cutter, you can work faster and without the risk of premature wear of the tool. Remember: if you process an
**aluminum**profile, cutters made of high.speed steel (as well as cobalt) will not work. - The cutting tool of smaller diameter (up to 6 mm) will significantly increase the number of revolutions per minute.
- Be attentive to the accumulation of chips in the working area and remove it in time.
- Extracting shavings from deep holes and grooves is extremely difficult. It is necessary to do a deep cut not immediately, but in several tricks, it will be easier to remove
**waste**and avoid damage to the tool. - The lubricant-coolest liquid will also help to avoid sticking chips, and at the same time cool the workpiece and the cutter. Use the sprayer!
- Maintain optimal feed speed. At too low speed, the tool will wear out stronger and cut worse. Use one and double-toothed mills. They have a fairly large space between the teeth, and they are not so quickly clogged with shavings.
- Do not turn on the machine for maximum power. This will lead to a decrease in the quality of the cut and a rapid breakdown of the milling.

note! Multi.tooth cutter (four teeth or more) aluminum profile cannot be cut!

## Angle.grinding machine

**Corner** grinder is a universal assistant who works well in **aluminum**. It is only important not to confuse the cut.out circle with grinding, choose a small thickness equipment to minimize the loss of material and protect your hands with your face from sparks.

- speed of work;
- worthy of the quality of the cut;
- relative cheapness of equipment;
- minimum user movements;
- The durability of equipment that allows you to cut metal profiles many times.

- the ability to burn metal in the cutting area;
- Without skills, it is unlikely that it will be possible to cut smoothly;
- To increase the accuracy of the work, the
**corner**grinder should be squeezed into a rack, which does not come complete with the tool and is rare in stores (the problem is solved if there is a vice).

Now it is worth studying special devices for **aluminum** work.

## Features of cutting aluminum **corner** grind

Using a **corner** grinder, it is difficult to perform high.precision cutting soft metals, especially with **aluminum**. The viscous material in its structure in the process causes difficulties and requires the use of specific actions.

For example, to cut a leaf product or any aluminum workpiece with a large thickness, kerosene is dripping on a working seam.

In this case, kerosene acts as a lubricant and does not allow the cutting circle of **corner** grinder to be bogged down in the metal.

When working with a **corner** grinder, it is necessary to strictly observe safety rules and control all the time so that a fire does not appear due to kerosene.

When purchasing a disk for a **corner** grinder, you need to know for processing what material this circle is intended.

Otherwise, an incorrectly selected circle will not only complete the task, but can cause an unexpected injury.

Therefore, choosing a cut.out circle for sawing **aluminum**, it is recommended to pay attention to its front surface.

It is on it that the manufacturer indicates which diameter the product has, for processing which material the circle is intended.

In addition, the cut.out circle for an angular grinder has a designation of the size of the landing hole, as well as an indication of the permitted number of revolutions, other marks according to the features of operation.

It is very important in the process of working with a **corner** grinder do not forget that the circle can only be affected by radial effort.

https://m-strana.ru/articles/chem-rezat-alyuminievyy-profil/

https://vt-metall.ru/articles/248-rezka-alyuminievogo-profilya

https://rustaste.ru/chem-rezat-alyuminijj-v-domashnikh-usloviyakh.html