New Designed

Fiber Laser Cutting Machine

Start from year 1982, leading fiber laser cutting machine manufacturing.

  • Germany IPG laser source.
  • Raytools & Precitec laser cutting head.
  • Customized bed size (heat - treated)
  • CE certified and 3 years warranty.
  • Timely after-sales service and support.

13 Tips For Flame Cutting

The reasonable cutting sequence is divided into the cutting of the inner hole of the component and the cutting of the edge of the component.

The reasonable cutting sequence of internal holes of components shall follow the principle of first inside and then outside, first small and then large, first round and then cross jumping, and first complex and then simple.

Inside before outside

When there are many holes in plate components, the middle hole shall be cut first and carried out outward step by step to make the cutting heat radiate outward regularly.

Small before big

That is, when the size of the inner hole is different, the small hole should be cut first. The cutting heat generated by the small hole cutting is small, and the thermal impact on the workpiece is small.

Circle first and then square

For cutting circular holes, due to the uniformity of the circle, the relative balance of the outward emission of cutting heat is relatively balanced, and the balance of the outward emission of cutting heat of square holes is relatively obviously insufficient.

The thermal stress generated by cutting heat has a great impact on the displacement and deformation of components.

Cross jump

For dense hole cutting, skip cutting instead of sequential continuous cutting can reduce the effect of stress generated by cutting heat on components.

Complex before simple

For holes with different shapes in the plate, cut the holes with complex shapes first, and then cut the holes with simple shapes.

Cutting of profile and edge

Selection of starting point of profile cutting

The selection of the starting point of profile cutting is directly related to the cutting sequence. If conditions permit, closed ring cutting should be preferred, that is, there is no cutting opening on the remaining material edge.

If the thickness is large and the material edge cannot be cut, the cutting line with control function can be used.

Through the mutual restriction of cutting lines with control function, the deformation of cutting is limited.

The geometric feature of cutting lines with control function is that the end is smaller than the front.

When there is no edge, measures should be taken to select the position of cutting point and cutting direction.

Fig. 1

Forced fixation

Forced fixing methods such as weight pressing are widely used in profiling cutting to limit the displacement of components or blank materials.

In NC cutting, the method of stop iron limit is usually used to control the displacement phenomenon.

Bilateral simultaneous cutting

It is applicable to the simultaneous gas cutting of multiple blanks with small width but long length on one steel plate.

This is an effective method to control bending deformation in gas cutting process.

Bilateral simultaneous cutting

It is applicable to the simultaneous gas cutting of multiple blanks with small width but long length on one steel plate.

This is an effective method to control bending deformation in the process of gas cutting.

Timely cooling

Timely cooling has obvious deformation control effect.

When NC cutting is adopted for Q235 plate with thickness of 6mm, length of 6m and width of 50mm, the method of cooling with water about 50mm behind the spacer is adopted to produce obvious control effect on bending deformation.

The cooling method of watering immediately shall be adopted, and the sensitivity of gas cut steel to water quenching shall be fully considered.

Avoid cracks or hardened structures caused by watering.

End limit method

When cutting long and narrow strips from the steel plate manually or semi automatically, open a long hole of (3 ~ 5) mm * (50 ~ 80) mm at both ends of the cutting line, and then cut along the cutting line, which can effectively reduce the bending deformation of strip cutting parts.

Fig. 2

Bump and Dent

When the thickness of gas cutting plate does not exceed 8mm, the shrinkage and deformation of gas cutting edge will intensify with the decrease of plate thickness.

When cutting this kind of plate, heavy objects can be applied on the plate to suppress and control the bulge or depression.

Interval cut-off

Interval cutting is to leave a length of 10 ~ 30mm after cutting a certain length in the cutting process, and then cut.

This method can effectively control the occurrence of displacement during cutting.

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