How to make the laser cutting machine in good working condition
A laser cutting machine is a laser beam to the surface to the energy released when the workpiece melting and evaporation, to achieve the purpose of cutting and carving, has high precision, fast cutting, cutting pattern is not limited to restrictions, will gradually improve or replace the traditional cutting process equipment.
And the use of high power laser system, according to the design in computer graphics, laser cutting machine manufacturer with professional laser cutting software, after focusing the laser irradiation on the metal surface and with the movement of the machine tool orientation, so as to achieve the principle of cutting. Metal is the main characteristic of laser cutting machine to cut the very complex graphics, cutting the cost is low, due to the wrong contact cut, the workpiece deformation is small, products of good quality.
Make laser cutting function to keep good work condition, the specific method is as follows:
1, note with a little oil on the screw, including laser tube bearing of the screw, and the first reflector can facilitate maintenance when disassembling. Note: do not add lubricating oil to the synchronous belt, drag chain, trachea, motor, sensor and lens, electric wires.
2, sports systems in work after period of time, movement joint creates a loose screw, coupling, will influence the mechanical movement smoothness, so in laser cutting machine to observe in the operation of the transmission parts have sound or abnormal phenomenon, found that the problem has to be strong in a timely manner and maintain.
3, laser cutting machine cannot place article, lest cause unnecessary damage to the machine.
4, use cotton cleaning metal oil tankers, metal shaft, slide block, and the dust and foreign bodies on the linear guide, filling grease, hand in hand limits do reciprocating motion.
CNC plasma cutting machine using the environment control
CNC plasma cutting machine due to involving the use of electricity, gas, etc, energy, and materials in the process of cutting dust, the control of the environment has certain requirements, in the current domestic processing factories and use environment, use of the environment control of CNC plasma cutting machine in both consciousness and is a great disparity in the hardware facilities, our company for many years to serve numerous mechanical processing enterprises, the production of yc series CNC cutting machine for the enterprise users, here we will discuss the use of the environment control of CNC plasma cutting machine is put forward views and Suggestions.
Plasma cutting machine cutting process will produce noise, dust, arc and metal vapor, damage to the environment, in the large current particularly when cutting or cutting non-ferrous metals. Now has several different equipment and technology can be used to reduce the pollution level, in addition to water recompression plasma arc cutting, water cutting and under water cutting is also an effective way to curb environmental pollution.
On the surface of the water cutting requires water storage tank, storage tank used for placing the workpiece in the workbench is composed of multiple orderly spire shaped steel members, by the spire shaped steel members will be work-piece support in the horizontal plane. Cutting, plasma arc is surrounded by a layer of water. In order to maintain continuous water, need a circulating pump, extract water from the water storage tank and then into the cutting torch. Water spewed from cutting torch when it forms over the water around the plasma arc. The water greatly control the cutting process of noise, dust, arc and metal vapor pollutants such as the damage to the environment. This approach requires the water flow is 55 ~ 75 l/min.
Under the surface of the water cut is placed artifacts about 75 mm below the surface. Placed the workpiece workbench is composed of spire shaped steel members. Choose the spire shape steel members is designed to make cutting workbench has enough ability to accommodate chip, slag.
Cutting into the water, with a stable compressed air will first cutting torch nozzle face around the water, and then ignite plasma arc cutting. Under the surface of the water cutting, to keep the depth of the workpiece dives below the surface. Should formulate a set of control system of water level, adding a water pump and water tank, with water flooding, drainage method to maintain water level.
General manual cutting or plasma cutting machine automatic cutting table near to equipped with convulsions system, take out exhaust work shop. Damage to the environment but still in waste gas, if more than national standard is allowed, the pollution caused by smoke transition should increase equipment.
Portable CNC plasma cutting machine installation should pay attention to some problems
Portable CNC plasma cutting machine is the most simple and practical in the CNC cutting equipment, cutting equipment, so a portable CNC plasma cutting machine is the market the most popular numerical control equipment, should be paid attention to in portable CNC plasma cutting machine installation is what? The following to everyone.
1. Block and the baffle
Selectively on the surrounding environment within the block and the baffle other cable and equipment could reduce the interference problem. In special applications, may want to consider the whole plasma cutting equipment shielding.
2. The workpiece grounding
If the artifacts for electrical safety and is not connected with the ground, and because of its size and location and is not connected with the ground, then the workpiece with ground connection, in some cases may reduce emission, but not always. Users should take measures, in order to place for the workpiece grounding increase the risk of injuries or damage to other electrical equipment. If necessary, the workpiece connection and artifacts should be taken directly connected with the ground, but in some countries, even directly is not allowed, at this time should be according to the regulations of the state, choose appropriate capacitor to achieve the connection.
Note: cutting circuit may be due to safety concerns and grounding or not. Change the grounding arrangements decision, must be a professional assessment and approval.
3. The equipotential connection
Should be considered in the cutting equipment and nearby all metal parts connected together. Connect the metal components and artifacts, however, will increase the operator at the same time they touch the metal parts and the electrode and the risk of electric shock. Operators should be connected with all such metal parts of the insulation.
4. Ways to reduce emission
Public power equipment should according to the manufacturer’s recommendations and public power supply connection. If there is interference, it may be necessary to take further measures, such as filtering of the public power. Cutting equipment for permanent installation, should consider to use wire tube equivalent material will supply cable shielding. Shield should be connected to the cutting of public power, in order to make the line pipe and equipment shell, cut power to maintain good electrical contact between shell.
CNC plasma cutting machine speed big reveal
Due to the different cutting power and cutting torch in cutting various metal material and different thickness, all have the best process parameters, therefore, should be according to the practice of equipment, artifacts, and other conditions to certain optimum cutting speed.
According to the design specification, plasma cutting speed limit at 3500 mm/min, this is the actual running of index CNC plasma cutting machine cutting speed, when, in fact, many manufacturers introduce products to the user, will give priority to with no-load running speed, the speed can be up to 7000 mm/min or more, but in any case, such a large speed range, for users is relatively difficult to grasp, in view of the different material, different thickness of the material how to design the speed during cutting.
Factors affecting the quality of plasma cutting has a lot of, such as no-load voltage and arc column voltage, cutting current, electrode, shrank, nozzle height, etc all kinds of plasma arc cutting process parameters, will directly affect the stability of the cutting process and cutting quality and effect. Generally speaking, the no-load voltage and arc column voltage, cutting current size, drop-off, cutting nozzle height in the electrode is directly affect the compression effect of plasma arc, also is the influence of plasma arc temperature and energy density, and plasma arc of high temperature and high energy determines the cutting speed, so the above a number of factors are related with the cutting speed in substance. As a CNC cutting equipment, should ask before to ensure the quality of cutting, should as far as possible improve the cutting speed. This not only increase productivity, but also can reduce the cut parts deformation and heat affected zone in slot. If the cutting speed is not appropriate, its effect on the contrary, it will increase the viscous slag, cutting quality decline.
Current plasma cutting according to different divided into a variety of cutting auxiliary gas, different auxiliary cutting gas cutting speed specification also is not the same, in the case of air plasma arc cutting, the cutting carbon steel plate, on the basis of 230 a cutting power flow, thickness of 6 mm carbon steel sheet cutting speed can reach 3300 mm/min relatively appropriate; When thickness adjustment to 40 mm, cutting speed is limited to less than 500 mm/min to guarantees the cutting effect and quality. If switch to other auxiliary cutting gas, such as pure oxygen cutting, cutting speed decreasing is bigger, in the same cutting current of 230 a, although the carbon steel plate, the thickness of 6 mm pure oxygen plasma cutting can be increased to 3700 mm/min, but about 40 mm carbon steel sheet cutting speed in just 350 mm/min.
Overall, due to the different cutting power and cutting torch in cutting various metal material and different thickness of the material, all have the best process parameters, therefore, should be according to the actual circumstance of equipment, the workpiece is to determine the most appropriate cutting speed specification.
For now the importance of industrial cutting CNC plasma cutting machine is increasingly prominent, the maintenance is also very important; In addition to some of the most basic daily maintenance, we should also from nc cutting machine work hours for maintenance, maintenance carried out in accordance with the operation of the length of time to verify, it can be divided into primary maintenance and secondary maintenance; CNC cutting machine operation for 600 hours, to do maintenance, general manual operation.
Adjust the tightness of cutting torch, to the normal operation of firmness, and examine the wear of the steel strip to adjust tightness.
In cleaning the cutting torch bearing, wire mother, four cylinder when add grease, clean up the cart gearbox filling grease to ensure the normal operation of the machine.
Use compressed air to clear the electrical box dust, check the fastening zero up the device and limit protection device.
After CNC flame cutting machine to cut off the power supply, with dry dishcloth equipment appearance, guarantee the equipment clean without pollution. When wiping note if there is any defect in the screw nut for timely.
Check and clean gas path, change to “retire” the trachea. Change to return to firearms filter and timely, ensure that gas path unobstructed.
Level 2 maintenance is 5000 hours in CNC cutting machine, mainly on maintenance workers in addition to the do level 1 maintenance should also:
Check the actuator components, such as cutting torch bearing wear, such as the need to change handle in time.
Machine for a long time also will affect the accuracy and to correct guide rail parallelism, adjust the wheelbase symmetry and check equipment precision stepper motor.
Repair the old shield drag chain accessories like peeling paint and repair.
Check the adjustment meter, valve repair back all damaged parts.
Speaking of CNC plasma cutting machine, with its power is plays an important role. It not only can effectively improve the cutting machine cutting effect and quality, from the point of long-term interests, at the same time also can save the CNC cutting machine of the purchasing cost.
CNC plasma cutting machine is a new type of hot cutting equipment, its working principle is the use of high temperature plasma arc quantity of heat to make the workpiece incision of the metal local melting (and evaporation), and the plasma momentum ruled out a molten metal to form a kind of processing method of incision.
1. Open circuit voltage and arc column voltage
Plasma cutting power supply, it must be high enough the no-load voltage, can easily burning arc and plasma arc stability. No-load voltage is usually 120-600 – v, and half of the arc column voltage is commonly no-load voltage. Improve the arc column voltage, can significantly increase the plasma arc power, thus can improve the cutting speed and cutting larger thickness of the sheet metal. Arc column voltage is often by adjusting the gas flow rate and increase the drop-off in electrode did not meet, but cannot exceed 65% of the no-load voltage of arc column voltage, otherwise it will make the plasma arc is not stable.
2. Within the electrode drop-off
Drop-off in refers to the end of the electrode to the nozzle distance, the appropriate distance can make the arc in the nozzle have good compression, gain energy concentration and high temperature of plasma arc and effectively cutting. Distance is too big or too small, can make the electrode serious loss, cutting nozzle burn out and cutting ability.
3.Cutting nozzle height
Cutting nozzle height refers to the nozzle end face to cut distance on the surface of the workpiece. The distance is commonly 4 to 10 mm. Its like the drop-off in electrode, distance to the right to give full play to the efficiency of plasma arc cutting, otherwise it will make the cutting efficiency and cutting quality decline or cut mouth burn out.
Using gas sniper taboo CNC plasma cutting machine
CNC plasma cutting machine is to think of CNC cutting machine and plasma cutting machine combination was called CNC plasma cutting machine, plasma cutting machine cutting torch has a lot of kinds, gas shot to the right operation, otherwise very easy to bad, advising clients to pay attention to when using the following items:
1. The torch of the electrode, and its center of hafnium silk when burning 2.5 — 3 mm; Should change in time, change the electrode must be completely cooled (use compressed air to blow), otherwise the electrode base heat expansion death tighter, unscrew when not overexert, otherwise easy to damage the electrode base. Electrode, the nozzle change before use; All needs to check to see if the inner cavity clean, must be used after remove impurities;
2. The use of compressed air must be dry clean. Due to moisture, oil easily conductive electrode produce spiral black grain, too much moisture, oil, makes the electrode, the nozzle inner cavity arc short circuit, easy to damage the cutting torch, and can’t work normally;
3. In the process of normal use, suddenly heard the sound of “scared”, red arc, arc on ballastless channeling, should immediately stop using, the electrode, the nozzle has been damaged, will continue to make damage to the cutting torch, and must be replaced electrode, the nozzle rear can use.
4. Air cooled type cutting torch using working current shall not be greater than the rated current, more than is easy to damage the cutting torch;
Air-cooled CNC plasma cutting machine cutting torch application field and scope
1, the cutting torch electrode, and its center of hafnium silk when burning 2.5 — 3 mm; Should change in time, change the electrode must be completely cooled (use compressed air to blow), otherwise the electrode base heat expansion death tighter, unscrew when not overexert, otherwise easy to damage the electrode base. Electrode, the nozzle change before use; All needs to check to see if the inner cavity clean, it is necessary to remove impurities after use.
2, in the process of normal use, suddenly heard the sound of “scared”, redness, arc arc on ballastless channeling, should immediately stop using, the electrode, the nozzle has been damaged, will continue to make damage to the cutting torch, and must be replaced electrode, the nozzle rear can use.
3, air cooled type cutting torch use working current shall not be greater than the rated current, more than is easy to damage the cutting torch.
4, replacing electrode, the nozzle host must be shut off the power and cutting torch not electrode, the nozzle can’t according to the cutting torch switch.
5, the use of compressed air must be dry clean. Due to moisture, oil easily conductive electrode produce screw rotating black grain, too much moisture, oil, makes the electrode, the nozzle inner cavity arc short circuit, easy to damage the cutting torch, and can’t work normally.
6, the cutting torch electrode, the nozzle in use process can’t loose, electrode with a special plate hand tighten, must check before each use, saw a loose with special spanner tighten at any time, but can’t use such tools as adjustable spanner.
CNC plasma cutting machine cutting torch air cooled refers to the cooling through the air plasma cutting torch, concentrated within 100 a plasma power supply, and usually used CNC plasma cutting opportunities according to different types of cutting torch cutting thickness is tie-in, here we talk about air-cooled CNC plasma cutting machine cutting torch is the main difference in water-cooled cutting torch, generally suitable for cutting processing under 10 mm stainless steel, metal materials, such as carbon plate air-cooled cutting torch, also known as air cooled cutting torch, in short, it is through the air natural cooling to reduce cutting torch surface temperature in order to achieve the purpose of use for a long time. Air cooled torch because of different cooling ways, short service life.
How to properly configure CNC plasma cutting machine
When some customers choose and buy CNC cutting machine, always assume that the configuration is high quality must be better, must be able to achieve the requirement of the high, must know everything in this configuration, highest self aeriform in spend a lot of money, but also may not meet their requirements. Today for the vast number of customers in the purchase of CNC plasma cutting machine of some of the ber area to give answer, let it in future purchase with the most suitable configuration, the lowest price the best effect.
Some cutting effect is very important to the customer request is very high,He thought that all configuration selection of imported high-end configuration, the effect will be reached, but as a result, the price will go up, so how to configure to make to achieve ultra cost-effective CNC plasma cutting machine cutting effect? Both can save money, and don’t need to buy America haibao, fly matt as expensive imported plasma power supply, this has always been the concern of the users, feel cheap made in China, but cutting effect than other countries! Here, this mysterious veil for you:
The first kind of circumstance: if only pure steel plate cutting, cutting quality is not high, can fully consider buying plasma cutting machine made in China.
The second case: if the cutting effect is very seriously, for groove as small as possible, without considering the price situation, chooses import brand is the best choice: like America haibao icp, fly matt, Germany kyle shellfish plasma power source such as the world first-class brand, quality and the effect is very good!
And the third is the user of the first case and the second are required, such things, whether it’s a low price or imported high quality cutting is one of the important factors, the user to consider to do this, after many cutting, we finally found a solution, that is in use in China better domestic plasma cutting machine, equipped with imported cutting torch alone to solve this problem, like Italy and America cutting torch and so on brand, cutting effect is better than that of the Chinese domestic plasma, plasma cutting machine and the price relative to the import, is much cheaper!
CNC plasma cutting equipment, different matching, to really purchase costs vary a lot, so the user must explicitly advisory carefully, to be able to buy cheap to use cutting machine products!
At run time, the current CNC plasma cutting machine, the speed control
The selection of process parameters on cutting quality CNC plasma cutting machine, the influence of cutting speed and efficiency of cutting effect is very important. The correct use of CNC plasma machine for high quality fast cutting, cutting process parameters must be to profoundly understand and grasp.
Cutting current: it is the most important cutting process parameters, directly determines the cutting thickness and speed, the cutting ability. Impact:
1, the cutting current increases, arc energy increase, cutting ability enhancement, the cutting speed is then increases;
2, cutting current increases, arc diameter increase, arc coarsens makes incision broadens;
3, cut too much electricity makes the nozzle increases heat load, nozzle prematurely damage, cutting quality natural decline, can’t even normal cut. So according to the thickness of the material before cutting correctly choose cutting current and corresponding nozzle.
Cutting speed: best cutting speed range can be selected according to equipment illustrate or use the trials to determine, due to the material thickness, material is qualitative different, high or low melting point, thermal conductivity size and the factors such as surface tension after the melting, cutting speed and the corresponding change. Main performance:
1, moderately increase the cutting speed can improve the quality of incision, namely a slightly narrow incision, incision surface more smooth, and can reduce the deformation.
2, cutting too fast makes the cutting line energy is lower than the required quantity, slitting cutting jet will be fast enough to melt in the melt blowing off immediately after to form a larger amount of drag, accompanied by incision, hang slag notch surface quality decline.
3, when the cutting speed is too low, due to the anode is the plasma arc cutting, in order to maintain the stability of the arc itself and the anode spots or anode area must near the nearest arc cutting seam find conduction current place, at the same time to jet flow of radial transfer more heat and thus make the incision width and incision on both sides of the molten material in bottom flange and solidified, form is not easy to clean, hang slag and incision on the edge formed by heat melt too much rounded corners.
4, when the speed is very low, because of the wide incision arc may even go out.