What Can Be Done to Optimize the Laser Cutting Path
Nowadays, the awarding of laser cutting machine has become more than and more all-encompassing, particularly in the field of sheet metal products processing.
Laser processing has the advantages of loftier machining precision, adept surface quality, low processing racket and small vibration of equipment.
However, laser cutting also has the disadvantages of slow processing speed, depression material utilization rate and high comprehensive processing cost.
Laser cutting machine adopts not-contact machining principle.
Compared with ordinary multi-station dial processing, no special mold is needed, so its processing scope and conditions are limited.
According to the requirements of product pattern, the complex shape can be cutting at will. It is suitable for unmarried trial production and small batch product, which can quickly satisfy the customers' pursuit of personalized products.
In the thick plate processing, light amplification by stimulated emission of radiation cutting processing advantages are more obvious. The cut thickness of steel plate is more than than 20mm, the full general multi-station presses can only process three ~ 8mm.
Because the light amplification by stimulated emission of radiation cutting auto uses the moving laser cutting head to procedure the plate, therefore it has longer dorsum and forth stroke.
Compared with the multi-station punching machine, the processing speed is boring, the total processing time is long, the efficiency is depression, and the auxiliary gas dosage is large.
Therefore, the comprehensive toll of laser cutting processing is much higher than that of dial.
How to shorten the light amplification by stimulated emission of radiation cutting time and ameliorate the efficiency of laser cut is the business organisation of many manufacturers.
The efficiency and economic benefit of the light amplification by stimulated emission of radiation cut machine are improved, which is mainly to shorten the time of laser cutting and amend the utilization charge per unit of the plate.
Information technology is necessary not only to study the shortest air travel of laser cut but besides to study bug such as drilling time, cut pause and nesting.
Analysis
Cut time
The laser cutting path can be divided into two parts, including the cutting path and the process path for the removal or separation of the textile.
The cutting path is the effective working path, the time consumed is the effective cut fourth dimension, while the empty stroke is the invalid path, and the fourth dimension consumed is the invalid working time.
For ane CNC laser cut machine, when using the maximum ability processing parts, the constructive cut speed is certain when the quality is guaranteed.
In gild to meliorate cutting efficiency and shorten the time of invalid cutting and reduce cutting path length is the main method.
In addition, adjust the procedure parameters of the cut procedure appropriately and select different perforation methods can also relieve the time of cutting processing consumption.
In the example of punching holes, such as the adjustment of the external low-cal path, the gathering beam, the vertical adjustment, etc. vest to the process aligning pause.
Sail metal cloth's utilization
The plate laser cutting procedure is divided into two parts, including components and rest materials.
The workpieces that are cut off past the design drawings are really useful parts, and the residuum is irregular, usually as waste material disposal.
Therefore, the effective utilization ratio of laser cut fabric = the surface area of useful parts/total area of the sail * 100%.
In guild to meliorate the utilization rate of the plate, we must reduce the balance cloth afterward laser cutting.
Now the laser cutting equipment can exist used to optimize the nesting function. It is the primary way to reduce the cutting spacing and edge distance of the various parts.
Certainly also can choose the small size raw fabric plate according to the workpiece size, or by the actual size of the part to make the not-standard size plate, to improve the actual utilization of the plate.
Solution
The off-line programming software of the light amplification by stimulated emission of radiation cutting auto is used to optimize the setting of sheet textile and procedure, then as to ameliorate the utilization charge per unit and cutting efficiency.
The post-obit measures are mainly adopted:
When nesting, use the borrowing border and the mutual edge
The parts with regular shape prefer borrow edge and share edge when nesting.
When cutting (figure i), one edge of the two parts is the shared edge, and so the cutting path will be shortened greatly, thus reducing the cutting time.
Fig.1 Shared edge cutting cases
On 1 sheet metal, you tin't make all parts share ane edge. Generally, information technology is recommended that two ~ 4 parts should exist used as a grouping to share the border.
Otherwise, all the parts share the border, which will cause the parts to exist unstable on the workbench.
Since the finished parts volition be turned up, the parts volition be processed on the border of the finished product parts, which volition interfere and damage the cutting caput.
In society to improve the precision of the final part, the span method can be used when cut with a shared edge, which is to make precise and micro connections betwixt the parts in the nesting. (figure 2) The distance is the bore of the laser spot.
Fig.2 The micro connectedness
According to statistics, the actual cut path can exist reduced by thirty%, and the material utilization charge per unit is increased by 8% if adopt shared edge cutting.
Reduce cut head lift
Usually, the auto volition lift up to a certain top after cutting an outline, and and then motion to the cutting position of the next contour for piercing and cut.
The purpose of this is to prevent collides with the cut piece when the cut caput from moving from the electric current profile to the next cut profile.
All the same, once the cutting path of the cutting head is optimized, or the contour of micro-connection is used, the lifting motion of the cutting head tin exist removed to improve the cutting efficiency of the light amplification by stimulated emission of radiation cutter.
Fig.three Before and after the cutting head lifting motion optimization (the dotted line is the cut caput move path)
FIG. 3a shows the lifting action of the cutting head. Figure 3b shows that the cutting head is not lifted after optimization and setting in the programming software. Motion directly to the cutting position of the side by side contour.
Note that afterwards using the above optimization method, you lot must pay attention to the movement runway of the cutting head.
In other words, the cut head cannot be passed over the finished contour, every bit shown in figure 3.
Fig.four Traditional laser cut path
Fig.5 Optimized laser caput cutting path
Optimize the cutting path starting hole drilling process
Before laser hole cut, make a hole in plate first.
After the material is irradiated past a continuous light amplification by stimulated emission of radiation, a pit is formed in the center, and the molten material is removed past the working airflow with the light amplification by stimulated emission of radiation beam to form a hole.
This hole is similar to the threaded hole through thread cutting. The laser beam is used for contour cutting at the beginning indicate of processing.
Normally, the line direction of the flight path light amplification by stimulated emission of radiation beam is perpendicular to the tangent direction of the cutting contour of the candy office.
At that place are many factors that influence the quality of laser drilling.
It should be based on the principle and characteristics of drilling, and the parameters of drilling must be analyzed and understood to optimize the processing engineering.
Apply different puncture engineering science and processing technology for different parts contours.
The piercing manner of light amplification by stimulated emission of radiation cutting machine mainly includes the post-obit three kinds:
(1) No puncture (for thin plates under 1mm)
(2) The common puncture, which is the pulse mode puncture, adopt high superlative power pulsed laser to cook or vaporize a pocket-sized amount of textile. Each pulse of calorie-free produces merely minor particles of spray, which is gradually deepened, so it takes a few seconds for the thick plate to perforate.
The advantage is that the piercing quality is high and the cutting quality is guaranteed.
The disadvantage is that it takes a long time and requires some debugging experience, and the puncture time increases with the thickness of the plate.
(3) Quick puncture, namely diggings perforation.
The material formed a pit in the center afterward continuous light amplification by stimulated emission of radiation irradiation.
The advantage is that the puncture time is brusk.
The disadvantage is big thorn perforation. If the position setting is not good, it will affect the contour, thus affecting the cutting quality.
The puncture fourth dimension is within 1s.
For thick plate cutting, specially large contour cutting, such as carbon steel plate above 4mm with a bore of more than 10mm. It is advisable to use quick puncture instead of ordinary puncture.
However, earlier setting the quick puncture, it is required to adjust the length of the cutting line properly (Quick puncture holes have large discontinuity and rough surface, requiring longer lead-in lines to right cut quality).
Fig.6 Perforation way
Optimize the sheet textile, reduce the plate waste material
Considering of the process needs, the parts are usually reserved in the nesting surface area. For example, the spacing between the parts or the altitude of the outer contour of the plate.
Proper reduction of spacing or the utilize of a shared edge can be used to save the plate.
Conclusion
In gild to explicate how to shorten the laser cut time and improve the utilization rate of the plate, this blog mail summarized iv methods including prefer shared edge cutting, optimize the sail material, reduce the cutting head lifting motility, and choose the punching method reasonably.
Through applied verification, to utilise the in a higher place methods comprehensively can effectively better work efficiency, reduce waste and amend economic benefits.
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Source: https://www.machinemfg.com/improve-laser-cutting-efficiency/
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