Characteristics connected with MQL
In the particular sheet metal cutting process, chopping substance is usually employed. Cutting liquid mainly works the role of a / c, lubrication, chips removal, and even rust prevention, which helps to improve often the device durability and reduce typically the thermal deformation of the particular workpiece, assure the area quality of the workpiece.
But a new lots of cutting substance has also caused a good lot of adverse consequences, but not only resulting in enhanced production charges, although also to the setting and human health has taken massive potential harm.
According to the info, the cost of cutting liquid is equivalent for you to 7%-17% of the complete manufacturing cost, while the particular associated with tools is simply 2%-4%.
When confronted with the requirements of decreasing production expenses, improving production conditions plus implementing environmentally friendly development intended for environmental safety, rational utilization of manufacturing resources, much less waste, less environmental polluting of the environment and high security, “Green Cutting” technology, which can be utilized in a new virtuous circle, is one of this leading enhancement developments in the field of innovative manufacturing.
Minimum Quantity Lubrication (MQL) is some sort of kind of green processing engineering with excellent advancement probable and broad application potential customers.
Micro-lubrication, in addition known as semi-dry cutting or quasi-dry cutting, is usually the vaporization of compacted gases (air, nitrogen, carbon dioxide, etc. ) and a good minimum amount of lubricating oil to make micron-sized tiny droplets, a trimming method that will sprayed in a machining spot for satisfactory lubrication.
The particular primary role connected with micro-lubrication is lubrication, which usually takes on a role in lowering friction, reducing sizzling rivers to improve the particular stream of chips.
Mql cutting technology dramatically lessens this cost of coolant, makes the resources, workpiece, in addition to chips beyond your cutting region dry, helps the being employed environment, eliminates the problem connected with waste liquid therapy, provides different application positive aspects, together with wide application collection.
An MQL brand framework diagram
Liquid Storage Container
Charger
Braided Air Hose-pipe
Lubricating Hose
Air Flow Control device
Shell
Oil, Regulation
Air Filter.
Precision oil pump
Deal with Valve Inlet
Filter Strain Outlet
Electromagnetic pulse legislation
Mql lubrication mode
01 Mist External Lubrication
Mister system External Lubrication: the cutting fluid is fed into a high-pressure spray method and even atomized in a good blend of gases. The droplets are then dispersed to typically the exterior of the chopping tool by simply one as well as more valve of up to LOGISTIK, micron dimensions, cool together with lubricate this cutting device
About the external lube process
This external reduction in friction technique is comprised of Air compressor, oil push, control valve, nozzle, and even piping.
The included product is a low price, lightweight, and can come to be effortlessly installed on equipment tools.
Nevertheless , because the particular position of the nasal has a significant effect within the lubrication effect, this is required to identify the best place and spray angle in the nose, and even it is difficult for any outside the body lubricated mist dust to enter the deep opening drilling processing location, and so the cooling and the lubricating impact is not really suitable for deep hole processing Externally lubed haze particles small, simple to travel around, on the work space will have a upbeat impact, and so the need to get supporting protective facilities.
02 Mist inner cooling down mode
Mist inner cooling mode: The cooling mist can be sent directly to the cutting area through typically the gaps of the spindle and the trimming software for cooling and lube. According to the processing need, the two wetness methods may be used to obtain the best cooling wetness result.
About the internal easing system
The internal lube process supplies the lube through the main shaft and the inner route of the cutter, which usually can reach the control area straight.
The lube is sufficient, and this general effect provides great improvements over the particular external lubrication.
Though the inside lubrication system in addition possesses some disadvantages: It the actual structure of the spindle plus tool system of the machine application complex, even affects the significant efficiency of the whole machine tool;
when the spindle velocity is too excessive, this is definitely affected by way of centrifugal force, often the slicing fluid is easy to stick to the inner ditch walls of the spindle and the instrument, so it is difficult to help reach typically the cutting sector.
At present, this spindle speed of the unit tool using the interior MQL technology does not really exceed 20000-30000 R or min.
In order to help avoid inertia and gravity influence, the inner lube system should consider often the fog compound generator.
Often the diameter with the fog compound must be modest ample to keep the fog particle suspended.
Specifications of MQL for reducing tools
In often the micro-lubrication cutting process, often the heat assimilated by simply the particular lubricant is much less, most connected with the heat is caught up by way of the chip and even absorbed by the software, hence the tool’s performance is usually required bigger.
01
Shifting tools must have exceptional high-temperature performance, hence the need to get a new cutting instrument material or even thermal safety hard surface coating.
02
The rubbing coefficient between chip and the device should be small, and it is way better to have the layer of lubrication movie on the top regarding the hard coating connected with the machine, to reduce typically the accumulation of reducing edge.
goal
Because the cutting edge of the chopping tool bears large mechanised stress and heat worry, the solidity plus impression toughness of typically the cutting edge are required to be high, the selection involving the particular geometric parameters involving the lowering tool in addition to the cutting variables will need to be reasonable.
The particular cutting tool can become used with regard to rapid computer chip elimination, lower Heat build-up.
Observe:
For typically the tools in the internal spraying MQL system,
to start with, the internal channels regarding the equipment should possibly be designed according to often the MQL system, and typically the strength guidelines of often the tools should be redesigned.
Second, the tools will need to be designed according to help the oil mist intake and exhaust, the entrance should always be positive for the penetration of mist dust, plus the exit should be good protected against poker chips.
Otherwise, the spattered debris will damage the grease departure easily.
The trimming overall performance of MQL
The final results present that MQL presents outstanding cutting performance weighed against dry cutting and cast cutting for titanium metal, hardened steel, high-temperature blend, and stainless steel, correct plus reasonable use of MQL can easily effectively improve program durability, improve the exterior quality associated with workpiece running.
Due to the superior cutting temperature of standard MQL technology, the wetness effect of cutting programme exterior will be increased when the slicing temperatures is too high in the event the temperature of the existing Compacted air can end up being significantly decreased, then, with the one hand, this intensity of heat transfer in the trimming zone could be increased, along with the warmth transfer effect might be increased; on the other side, the improvement from the warmth transfer effect may make this lubrication film produced upon the surface of typically the tool to have the reduction in friction potential further, so as to improve the tool toughness. If MQL blended with nitrogen, MQL may conduct better-cutting performance; that is mainly due to the role of nitrogen-oxygen.
Certainly, together with the field of program is limited. Micro-lubrication technology is an successful green manufacturing engineering, which has popular advantages found in lubrication, computer chip removal, etc. As a good new wetness technology, low-temperature MQL engineering is convenient to be used from the machining field, highspeed engineering of difficult-to-process materials for instance superalloy and high firmness has great properties, that may further improve the machining performance and quality of difficult-to-process materials on the machine equipment.
Q: Single / Increase Channel Collection issue
In a MQL process, there are a couple of simple ways of mixing air and lubricant. The single-channel internal cooling tool MQL system combines the 2 pieces in a reservoir behind the spindle together with then passes through a good pipe through a rotating union joint, the combination of air and lubricant is conveyed to this mind of the silverware through the pole and even the knife tower.
This dual-channel internal cooling application MQL system is a new circulatory system in which will lubricant is usually continuously driven from a city and even stored in a spherical tube. To provide a precise amount of lube, a quick-acting valve inside front of the Rotary Conveyor used to regulate the amount of oil entering the system. Any time the MQL system is usually required to operate, this quick-acting valve is exposed to extract the utmost quantity of oil from the ring tube.
Some sort of precise amount of lubricant is delivered to the nozzle at the back involving the handle via a aerosol rod on the middle of typically the spindle. When the lubricating liquid enters the nasal area through the spray Fly fishing rod, the oxygen supplied simply by the particular revolving conveying product makes its way into the blending chamber of typically the nozzle coupled the soothing passage around the central axis of the shower stick, and the atmosphere together with the lubricating liquid will be mixed in the blending room to Form Gas Water. The water then moves through a cooling down hole in the tool and is ejected as a great lubricant / Air Compound.
Spindle speed is the element to think of when selecting A SINGLE-OR DUAL-CHANNEL MQL system. The single-channel system mixes the lubricant together with weather in advance of passing by way of the spindle, so this maximum allowable spindle acceleration is about 16, 500 R / min. It is because centrifugal forces at increased rates may cause the oil to separate from the air. The particular dual-channel system is suitable with regard to spindle speeds up for you to about 40, 000 Ur / Minutes.
Also, regarding a single-channel program, the particular flow distance with the product is limited, and the optimum flow is concerning 1270 milimetre ahead of often the flow price slows along. This is not necessarily a problem for some sort of standard engineering center. Still, for a huge Gantry machining center, a good single-channel system can be installed on typically the Longmen body so that this can certainly move with typically the Gantry, often the MQL system can not place on often the ground, and long-distance move fog.
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