Raise milling to machine the efficiency of black lead electrode

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  • source:MCGUFFIE CNC Machining
Use machining center of HSM high speed to undertake to black lead electrode milling is machined, can carry taller manufacturing efficiency not only, also can assure good treatment quality at the same time, suit to be used at machining the Bao Bi small electrode with complex external form especially. Current, simple to ability of talent of hard steel of temper by dipping in water work is machined, high speed machining center received more and more application. Then, the domain is machined in mould EDM, some people think, when the method that uses treatment of discharge of black lead electrode already was passed, actually otherwise. In high speed treatment, process material of hard steel of temper by dipping in water in milling especially all sorts of model when antrum or complex three-dimensional external form, the deviation of cutting tool of radial and jumpy sum of errors meets those who bring about cutting tool rupture, cause treatment to interrupt thereby, and affect final treatment quality. In addition, on handling time, the time that spends to the treatment of material of hard steel of temper by dipping in water should be more than milling to machine the time that place of black lead electrode needs far. Accordingly, raise milling to machine the efficiency of black lead electrode, to pattern production company, still have very important place. When the foundation of electrode of black lead of treatment of high speed milling is machining the spare parts with graphite simple material, "High speed " the lasting target that is production enterprise pursuit, and the high speed machining center that main shaft rotate speed can reach 30000 ～ 60000r/min can offer extremely high feed rate. Graph 1: Circular thin wall is machined on black lead electrode, need uses miniature cutting tool, this needs extremely high main shaft rotate speed to be on these high speed machining center, the electric machinery volume that is used at drive main shaft lesser, weight is lighter, the cutting power that accordingly its produce is lower also, reduced the possibility that cutting tool ruptures in treatment thereby. 1.

Main shaft gives excellent part for effectively treatment, avoid cutting tool to rupture in producing a course, uses cutting tool is smaller, the main shaft rate that its need is higher also. Should use milling of miniature cutting tool, auger when cut and carving black lead electrode, the high frequency main shaft that uses range of 60000r/min the following rotate speed is idealer. High speed processing technique uses extremely high rotate speed, lesser step pitch, but raised feed rate substantially however. Because athletic rate is very rapid, the quantity of heat of the generation in treatment conducts a part without enough time in, because this also won't produce precision because of be heated,do not wait for a problem firmly surely. Graph 2: The main shaft that the air cylinder all round black lead workpiece reachs installation to go up in machine tool of this high speed can generate air stream of eddy current type, make black lead dust maintains move ceaselessly 2.

The quality to treatment and efficiency are having the geometrical figure that geometrical appearance cuts the cutting tool that machines electrode with Yu Xi a crucial action. Common CNC machine tool can use the machine tool of miniature cutting tool effectively impossibly through transform and becoming, same, figure of average cutting tool geometry (to large cutting tool) impossible also scale down becomes miniature cutting tool. Because, although the cutting tool scale down of will bigger diameter becomes lesser cutting tool, so it also cannot bear the higher feed rate in treatment, and achieve satisfactory exterior surface roughness impossibly also. 3.

Of cutting tool wear away below condition of treatment of high rotate speed, requirement cutting tool must have very good dynamic balancing property, have the larger space that cut bits to eliminate in order to assure to cut bits appropriately. Of cutting tool the problem that wearing away is maker place attention as before. Using coating of special cutting tool is to prevent excessive tatty a kind of powerful weapon. Be like TiAlN coating, AlCrN coating, to abrasiveness material treatment also shows very tall efficiency. Note 1.

Dustproof because black lead is a kind easily tatty material, because this protection environment prevents black lead dust,splattering is very important. In beg when buying black lead to machine a machine tool, should consider the following: (1) the linear guide that the machine tool should have sealed protection, ball guide screw should be had pressing air current dustproof character, prevent abrasiveness material to enter the athletic component of high speed machining center. (2) component of all athletic control electron and electric machinery should use sealed shield protection, prevent a machine tool to control a system to be polluted. (3) should deserve to have complete set sealed guard, use with safety lock form a complete set, join with system of an aspiration air current. This treatment system is right composite material of treatment black lead, fibre glass, pottery and porcelain or any abrasiveness a kind stuff is very good. Graph 3: Black lead milling machine 2.

The machine tool with the advanced measurement of cutting tool length still should have another characteristic: This one machine tool should be helpful for the milling of black lead machining, the length of its cutting tool is OK because of cutting tool wear away and get compensating. Sensor of this one cutting tool replaces the system becomes independent by 3 and the component of teamwork work comprises: (1) the device that change a knife. The device that change a knife is a bracket or a tray actually, place above have reserve the space of cutting tool and place rupture the empty buy electrical outlet of cutting tool. Machine tool operator can mix bracket reserve cutting tool stores together, if become nightly happen without the cutting tool when lamplight works or nobody change production to operate rupture, can offer these reserving immediately cutting tool. (2) cutting tool detector. Cutting tool detector is the mechanical sensor of length of a measurable cutting tool. Actually, this one instrument can apply at cutting tool wears away or happening to rupture above all when the circumstance detect. (3) software. Software is a grand program, after the code that implementing a lot of travel, can install pair of moving cutting tool to undertake checking. For example, the grand order that a cutting tool checks is carrying out every 500 code to begin to check later. This kind of examination is called " assume " type statement, be about to the standard measured value inside the real measured value of cutting tool and system is compared, if be less than standard measured value, change cutting tool. The high speed milling that epilogue undertakes one pace reachs the designated position to material of hard steel of temper by dipping in water is machined, the technology of high speed machining center had developed very high level. The milling treatment that is black lead electrode thereby offerred necessary work efficiency and treatment quality. In mould manufacturing industry, dispute of this one craft often has those who develop a future, believe to be in future inside a period, this one craft becomes the mainstay of this industry probably. CNC Milling