Firstly, let's talk about how to identify the moisture content of the hydraulic oil in the hydraulic cylinder of the hydraulic cutting machine:

(1) Burning method: Dip a small amount of the oil to be tested in clean and dry cotton paper or yarn, and then ignite it with fire. If there is a flashing or "cracking" sound, it indicates that the oil contains a lot of water.

(2) Visual inspection method: If the oil in the hydraulic cylinder appears milky white and turbid during use, it indicates that the oil contains a large amount of water.

Secondly, regarding the identification of hydraulic oil impurities in the hydraulic cylinder of the cutting machine:

(1) Heating identification: Hydraulic oil with relatively low viscosity can be directly placed in a clean and dry test tube and heated up. If sediment or suspension is found in the oil in the test tube, it indicates that the oil already contains metal powder.

(2) Filter paper identification: For hydraulic oil with high viscosity, it can be diluted with pure gasoline and then filtered with clean filter paper. If a large amount of metal powder is found on the filter paper, it indicates that the hydraulic components have been severely worn.

(3) Sensory identification: There are obvious suspended metal particles in the oil used in hydraulic cylinders, which can be felt as small particles when pinched with fingers; Under illumination, if there is a reflective flash point, it indicates that the hydraulic components have been severely worn; If there are a large amount of metal shavings settling at the bottom of the fuel tank, it indicates that the main oil pump or motor has been severely worn.

(4) Sound identification: if the whole hydraulic system has intermittent and loud noise and vibration during the operation of the hydraulic cylinder, and the main oil pump will make a "buzzing" sound, or even the piston rod will "crawl", then observe the liquid level of the oil tank, the outlet of the oil pipe or the transparent level gauge, and a large number of foam will be found. If this situation exists, it indicates that the hydraulic oil has been immersed in a large amount of air.

In order to ensure stable operation of the hydraulic cutting machine, it is necessary to replace the hydraulic oil and maintain a better state.

Judging the quality of hydraulic cutting machine

1、 Appearance

Except for the chassis, most parts of the exterior will be painted according to customer needs. Looking at the appearance is not only about the surface layer, but also about the interior, such as the oil cylinder, chassis, and workbench; Pressure plate with four pillars, etc. It is especially important to touch the pressure plate with your hands to detect the difference between the new and old machines.

2、 Voice

Sound can not only distinguish the quality of the cutting machine, but also confirm whether it is a new machine. Under normal circumstances, it is impossible for a new machine to produce noise, and even after using it for more than 10 years, it is rare. Only when the motor energy is exhausted will it make abnormal noise. If a rustling noise is made, it indicates that the machine has a problem.

3、 Electrical control box

The electrical control box of the cutting machine generally does not require a key to open, and can be easily opened to check whether the internal circuits of the machine are normal or neat, and whether the materials are normal at a glance.

4、 Test machine

The task of testing the machine is very important. You can wear your own materials to the manufacturer for testing, which can detect whether the operation is flexible; ② Can detect the production efficiency of the cutting machine; ③ Can detect the quality of the punched product, etc.