How to calculate the compressed air consumption of the punch

How to calculate the compressed air consumption of the punch

when the punch is working, compressed air is used in many places. For example, the cylinder that controls the clutch and brake, the cylinder that pushes the feeder, and the air cushion and purging gas, etc. How much air compressor does it need to be enough? In fact, it is not complicated to calculate. You can figure it out by following the following steps.

The first step is to find out how many places on the punch are using gas. Generally speaking, there are several places where punch press gas is used. One is the main cylinder, which is the big cylinder that controls the up and down movement of the punch. This is the place where the most gas is used. The other is the feeding cylinder, which is responsible for sending the steel plate or parts to the position. There may also be purging gas, which is used to blow the debris on the workpiece clean. List all these places where gas is used and don't miss any of them.

The second step is to calculate how much air each cylinder will eat at one time. This is actually the volume of the cylinder. The volume of the cylinder is equal to the area of the piston multiplied by the distance the piston moves. The area of the piston is the size of the cylinder bore, and the distance of movement is how long the stroke is. These two numbers are multiplied together to obtain the amount of air required for one expansion and contraction of the cylinder. However, it should be noted that the cylinder is pushed forward and retracted in both directions, so the actual amount of air required for a complete action is twice that of a single trip.

The third step is to calculate how much air is used in one minute. After knowing how much air a cylinder needs for one action, multiply it by how many times a punch hits a minute. For example, if the punch presses 60 times a minute, multiply the air consumption of one action by 60 to obtain the air consumption of this cylinder for one minute. If several cylinders are using gas at the same time, add up the air consumption of each cylinder for one minute, which is the total amount of air required by the punch for one minute.

Step 4, add some surplus. In actual production, there will be air leakage in the pipeline, and the joint may not be so sealed. In addition, sometimes the movement rhythm of the punch will change, so the air compressor cannot be matched with the calculated figure just right. It is generally recommended to add 20% to the 30% margin on the basis of the calculated total gas consumption. In this way, even in case of emergency, the gas will be enough, and there will be no problem that insufficient air pressure will lead to boring work in the punch.

Give a simple example to help understand. Suppose there is a main cylinder and a feed cylinder on the punch. The main cylinder needs ten liters of air for one action, and the feeding cylinder needs three liters of air for one action. The punch is played 50 times a minute, the main cylinder uses 500 litres of air a minute, and the feeding cylinder uses 150 litres of air a minute, which adds up to 650 litres. Plus the 25% margin, it's about 800 litres. In other words, you need to find an air compressor that can output more than 800 liters of compressed air per minute to make this punch work smoothly.

What can the water lubricated air compressor do to help here. The working environment of the punch is usually harsh, with metal dust in the air and the smell of oil. The air discharged by the traditional oil-lubricated air compressor has oil in it. These oil components follow the compressed air into the cylinder and valve of the punch. After a long time, the seal will age and harden, and the cylinder action will become unsmooth. The valve is also easy to get stuck. And oil and dust mixed together will become sticky things, blocking the gas path, affecting the accuracy of the punch.

Water lubricated air compressor does not have this trouble. It uses water instead of oil to lubricate the inside of the machine, and the compressed air discharged naturally contains no oil. In this way, the air entering the cylinder and valve of the punch is clean and will not be mixed with dust to become dirty, and the life of the seals and valves can be extended a lot. For punching machines, which require long-term stable operation of equipment, water-lubricated air compressors supply air, the later maintenance cost will be much lower, cylinders and valves do not need to be cleaned and replaced frequently, and the money and time saved are real.

Therefore, to sum up, the air consumption of the punch is to calculate the volume of each air cylinder, multiply it by the number of actions per minute, add it all together, and add a margin of 20% to 30 to obtain the required air compressor size. The water lubricated air compressor because the output of the air does not contain oil, can keep the air system of the punch clean, reduce the failure, is a very good choice for the punch air supply.