What are the multifunctional angle rulers of CNC bending machine in bending?

In the bending of CNC bending machine, the multi-function angle ruler that needs to be used has the following items:

(1) Measure the angle between 0°-50°.

The square and rulers are all installed, and the measured part of the product is placed between the measuring surfaces of the base ruler and the ruler for measurement.

(2) Measure the angle between 50°-140°.

The square can be removed, and the ruler can be installed to connect it with the fan-shaped board. The measured part of the workpiece is measured between the base ruler and the measuring surface of the ruler.

(3) Measure the angle between 140°-230°.

Remove the ruler and the clamping block, and only install the square, but push the square up until the intersection of the short and long sides of the square is aligned with the sharp edge of the base ruler. Place the measured part of the workpiece between the base ruler and the measuring surface of the short side of the square for measurement.

(4) Measure the angle between 230°-320° (that is, the internal angle of 40°-130°).

Remove all the square, ruler and clamps, leaving only the fan-shaped board and the main ruler, and place the measured part of the product between the base ruler and the measuring surface of the fan-shaped board for measurement.

What are the multi-function angle rulers of CNC bending machine in 　 bending? The difficulties encountered by laser cutting machine for thick plate cutting?

CNC bending machine

Laser cutting machine thick plate cutting difficulties and solutions

Anhui Yongya feels that it is no longer a problem to cut steel plates with a thickness of less than 10mm with a laser cutting machine. But if you want to cut thicker steel plates, you often need a high-power laser with an output power of more than 5kW, and the cutting quality is also significantly reduced. Due to the high cost of high-power laser equipment, and the output laser mode is not conducive to laser cutting, traditional laser cutting methods do not have advantages when cutting thick plates. The following technical difficulties exist in metal cutting thick plates:

It is difficult to maintain the quasi-steady state combustion process

In the actual cutting process of metal laser cutting machine, the thickness of the plate that can be cut through is limited, which is closely related to the inability of the cutting front iron to burn stably. For the combustion process to continue, the temperature at the top of the slit must reach the ignition point. The energy released by the iron-oxygen combustion reaction alone cannot actually ensure the continuous combustion process. On the one hand, due to the continuous cooling of the cutting seam by the oxygen stream sprayed from the nozzle, the temperature of the cutting front is reduced; on the other hand, the ferrous oxide layer formed by combustion covers the surface of the workpiece and hinders the diffusion of oxygen. When the concentration of oxygen decreases At a certain level, the combustion process will be extinguished. When using traditional convergent beams for laser cutting, the area where the laser beam acts on the surface is very small. Due to the high laser power density, not only the area where the laser is irradiated, the surface temperature of the workpiece has reached the ignition point, but also due to heat conduction, the area is wider. The area reached the ignition temperature, and a laser loading and unloading machine can be equipped later.

The oxygen purity and pressure in the thickness direction of the plate are difficult to maintain constant

When cutting thick plates with a metal laser cutting machine, the decrease in oxygen purity is also an important factor affecting the quality of the cut. The purity of the oxygen stream has a strong influence on the cutting process. When the purity of the oxygen stream decreases by 0.9%, the iron-oxygen combustion rate will decrease by 10%; when the purity decreases by 5%, the combustion rate will decrease by 37%. The decrease in the burning rate will greatly reduce the energy input into the kerf during the combustion process and reduce the cutting speed. At the same time, the iron content in the liquid layer of the cutting surface will increase, which will increase the viscosity of the slag and make it difficult to discharge the slag. Severe dross will appear in the lower part, making the quality of the cut unacceptable. In order to keep the cutting stable, it is required that the purity and pressure of the cutting oxygen flow in the thickness direction of the plate be kept basically constant.

There are generally three ways to solve this problem:

(1) Add a preheating flame around the cutting oxygen flow.

(2) Add an auxiliary oxygen flow around the cutting oxygen flow.

(3) Reasonably design the inner wall of the nozzle to improve the characteristics of the air flow field.