Advantages of laser cutting machine in the shipping industry

Advantages of laser cutting machine in the shipping industry

There are four main types of ship hull plate parts, which are flame cutting, plasma cutting, cutting and laser cutting.
1.Equipment performance comparison
The cutting performance of the flame cutting machine can be carried out by the cutting machine. The plasma cutting machine is fast and the cutting machine has high efficiency, but it can only be limited to the machining of the linear side parts. But the cutting plate speed is relatively slow. It is due to the advantages of high precision, laser cutting machine in high sheet product construction, block construction process without allowance precision management, build merchant ships of welding groove line of demanding process: such as FCB puzzle, double wire submerged 4 arc automatic welding and other aspects, has irreplaceable advantages, the laser cutting machine is to change the smooth implementation of the method has laid an important foundation.

The comparison of the parameters of the laser cutting machine and the other two kinds of cutting equipment is listed:
Application of laser cutting machine in the actual production of shipping industry
Through comparison of the performance of laser cutting equipment and other equipment, the main advantages of the laser cutting equipment are cutting high precision and small thermal deformation. This feature has a broad application prospect in the practical production.
There is no allowance for advancing the process of building a new high tech ship
High precision requirements for ship hull zhuanpei high frame, zhuanpei gap must be controlled in the range of 1mm. In a bottom part EB02 for example, formerly in the plasma of floor plate material, in order to ensure the assembly gap, in the coal floor are set to mow the margin (as shown in the following picture), the allowance of the ribbed plates are is in the field assembly manual to mow, mow the quality parameter difference not neat inner slotted oxides are not clear and easy to, but also increase the workload of the assembly, assembly cycle of growth, resulting in the block construction period is prolonged. Using laser cutting machine to improve the accuracy of parts, in the relative to cancel the assembly margin, the structure of the assembly speed is significantly accelerated. The assembly quality of the whole block is improved obviously, and the precision of the construction is also improved at the same time. The fact proves that the more accurate parts are good for the main dimensions of the segmented.
Promote the change of thin plate cutting
Section thin-walled superstructure construction division is an important part of the whole high engineering hull construction, the thinnest thickness coaming of only 2mm; in the superstructure segment in the process of the construction, expect from the next parts manufacturing, block manufacturing, total group equipped with a series of processes are in the hands of the process, thin wall plate is very easy to lose stability deformation. So section thin-walled superstructure construction of each process are key control, and it is the introduction of laser cutting machine, promote the thin-walled material engineering change. To ensure the quality of the construction of the sub construction.
Before the introduction of laser cutting machine, the cutting of the 2-3mm cutting of the sheet is mainly through the manual line. Through Zhaping were leveling; artificial marking and shear cumulative error in 3mm, resulting in in wall imposition assembly of ultra poor gap, unable to realize the assembly gap in the range of 1 mm requirements, tend to have a lot of modification cutting phenomenon; and for 4 6mm steel plate, using ion cutting, because of the thin sheet metal, the cutting heat, steel plate edge straightness is not up to the requirements, after cutting Zhaping, still need the edge planing machine for edge processing, an increase of machining process.
To the Ministry of loading stage, there are a large number of wall due to the material error or scrap or rework, and in the sub wall assembly, the wall edge potential repair or assembly gap is endless, and the material is not used in the cutting machine before the material scrap rate is high. Introduction of laser cutting machine thick, it is using its high processing precision, small heat input, all thin wall are used laser cutting and blanking, step in place, eliminating the need for the lineation, Zhaping, planing process; to eliminate the problems caused by plate's loss, greatly improve the processing efficiency.
It is clear that the use of laser cutting machine for thin plate cutting is a process of change. Greatly improve the efficiency and quality of the thin wall segment processing.
In short, laser cutting machine as a new type of hull parts cutting equipment, compared with other conventional cutting equipment, with high machining accuracy, small thermal deformation, good stability, low loss rate, small environmental pollution and other advantages, in the shipbuilding industry has great potential for application. Currently in in section of high ship building without remainder, sheet cutting method change has good application, greatly improving the processing efficiency, eliminating the on-site repair cut phenomenon, reduce the labor and material waste. The advantage of laser cutting machine will be wider and deeper application in ship manufacturing.

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Teach you how to easily distinguish the quality of laser cutting machine

Teach you how to easily distinguish the quality of laser cutting machine

1.Roughness

Laser cutting section will form the vertical lines, the depth of the lines determines the cutting surface roughness, the more shallow the lines be, the more smooth cut section be.Roughness not only affects the appearance of the edge, but also affects the friction characteristics, in most cases, we need to minimize the roughness, so the more shallow, the higher the quality of cutting.

2.Verticality

If the sheet metal thickness is more than 10mm, the verticality of cutting edge is very important. Away from the focus, the laser beam becomes divergent, based on the focus of the position, cutting toward the top or bottom of the width. When the cutting edge deviates from the vertical line of a few millimeters, if the edge is more vertical, the cutting quality is better.

3.Cutting width

Generally cutting width does not affect the cutting quality, cutting width is important only cutting special precision contour in internal parts of components, Because the cutting width determines the minimum of the outline, When the thickness of the plate increases, the cutting width increases. So if you want to ensure that the same high accuracy, regardless of the width of the cut, the workpiece in the laser cutting machine processing area should be constant.

4.Lines

When the high speed cutting plate, the molten metal will not appear in the vertical laser beam below the cut, but will be in the laser beam to spray out. As a result, the curved lines are formed in the cutting edge, and the lines follow the moving laser beam closely. In order to fix this problem, the feed rate can be cut down at the end of cutting.

5.Burr

Burr formation is a very important factor to determine the quality of laser cutting. Because the removal of burr is an additional workload, so the amount of the amount of burr is very serious and the quality of the cutting can be judged visually.

6.Material deposition

The special liquid of a layer of oil on the surface of the workpiece prior to the melting of the perforation. Laser gasification process, the upward or downward discharge will be formed on the surface of the deposition.

7.Sag and corrosion

Depression and corrosion have a negative effect on the surface of the cutting edge. They appear in general this should be avoided in the cutting error.

8.Heat affected zone

In laser cutting, the area near the notch is heated. At the same time, the structure of the material changes. For example, some of the material will harden. Heat affected zone refers to the depth of the region of the internal structure change, the smaller the better.

9.Deformation

If the cutting causes the parts to be heated rapidly, it will deform. This is particularly important in the fine processing, because the contour and the connecting piece is usually only a few millimeters wide. Controlling the laser power and the use of short laser pulses can reduce the heat of the part and avoid the deformation.

Of course, just look at the effect of cutting materials nor each material are suitable, such as you get very poor material, The effect of cutting for each machine is not good, as another example, you take some not suitable for laser cutting of materials may not be able to conclude. We recommend that the materials are: acrylic, organic glass, ABS and other materials

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Maintenance of laser machine

Maintenance of laser machine

Laser machine must be maintained in order to use a more permanent.

1.Replacement of water and clean water tank

Suggestion: wash the laser tank and replace the circulating water once per week
Note: Before open the machine must ensure that the laser tube is filled with circulating water.
The water quality and the water temperature of the circulating water directly affect the service life of the laser tube, it is recommended to use pure water, and the water temperature is controlled at 35 degrees Celsius. For more than 35 degrees Celsius to replace the circulating water, or add ice to water to reduce the water temperature, (recommend that the user choose a water chiller, or use two water tanks).
The tank cleaning: first turn off the power supply, the water inlet pipe is pulled out, so that the laser tube water automatically flows into the water tank, water tank is opened, remove the water pump, clear water pump on the dirt. The cleaning tank clean, replacing the good water circulation, water return tank will connect to pump water pipe is inserted into the water inlet, the joint order. The pump is powered by a single pass and run for 2-3 minutes (the laser tube is filled with circulating water).

2.Fan cleaning

Use the wind turbine for a while, the wind machine inside accumulate a lot of solid dust.The fan produces a lot of noise, but also not conducive to the exhaust and odor. When appear fan inadequate suction exhaust is not smooth, please turn off the power, wind turbine air inlet pipe and an air outlet pipe, remove dust inside, and then inverted fan and pulling the wind leaf relief until clean, and then install the fan.

3.Lens cleaning

There are three mirrors and a focusing mirror (No. 1 mirror is located in the laser tube's launch exit, which is the upper left corner of the machine.
No. 2 is located in the left end of the beam reflector,
No.3 mirror is at the top of the fixed part of the laser head, poly focal lens in the lens barrel is arranged at the lower part of the laser head can be adjusted).
The laser is reflected through the lens, focusing from the laser hair shot out.
Lenses are easily stained with dust or other contaminants, resulting in the loss of laser or lens damage, No. 1 and No. 2 lens cleaning should not be removed, only to be dipped in a clean liquid of the mirror carefully along the central edge of the lens to the edge of the rub.
Note: 1. The lens should be gently wipe, do not damage the surface coating; 2. Clean the process should be handled with care, to prevent the fall; 3. Focusing mirror installation please be sure to keep concave downward.
The 3 lens and the focusing mirror is removed from the frame, use the same method to wipe, wipe after it is put into the can.

4.Cleaning of guide rail

Guide, linear axis, as one of the core components of the device, its function is to guide and support. In order to ensure that the laser machine has higher accuracy, it is required that the guide rail, straight line has a high accuracy and good motion stability. In the process of operation, because of the large amount of corrosive dust and smoke, the smoke and dust in the process of processing will produce a lot of dust and smoke.The smoke and dust be in a long time, a large number of deposits in the rail, linear axis surface, the machining accuracy of the device has a great impact, and will be in the guide line of the formation of pitting, shorten the service life of the equipment.

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