Quantity body is custom-built and special milling cutter

Hughes says, "E.g. , to crankshaft treatment, do not have off-the-peg standard milling cutter. The work with specific basis of need of crankshaft milling cutter and body of quantity of treatment machine tool are custom-built. " also put in similar case in company of compressor screw treatment. Ken Accavallo of milling cutter expert says, "Screw milling cutter belongs to special figuration cutting tool, every need milling cutter to be designed technically. " he points out, use these special milling cutter, final user need not take a knife for many times, the tooth of whorl of yin and yang that give mutual clench the teeth with respect to can efficient treatment and drives air to pass compressor. No matter apply at which industry, if standard milling cutter cannot achieve the treatment cycle time of a requirement, design special milling cutter with respect to need. In addition, fall in certain circumstance (if the client changed manufacturing order form) , produce change possibly also to machining the requirement of cycle time. HORN (the United States) the condition that Duane Drape of company selling manager described a kind of hypothesis: A manufacturer can be annual in the past on a machine tool machine with standard milling cutter 20, 000 spare partses, but order increases now annual 25, 000 spare partses. This manufacturer faces two kinds of choices: It is to purchase a machine tool again, with 5 what add newly at treatment, 000 spare partses; 2 it is to find a kind of method, below the condition that need not add fixed assets newly to invest, improve the process capability of existing machine tool, make its can be produced every year 25, 000 spare partses. If convert appropriate special milling cutter, finish the full treatment job of the requirement possibly in a machine tool not only, make this machine tool has time of have more than needed to be used at machining other part possibly still even. Passing custom-built cutting tool to raise productivity and metallic purify rate always is not to mean must go up to touch war greatly in cutting tool design. Hughes expresses, "Occasionally, through increasing bit amount simply, or a variety of treatment and the compound bit that reduce knife number can be achieved in the configuration on special cutting tool, can achieve the goal that improves productivity. " Drape also thinks, custom-built cutting tool may need to undertake altering subtly to having standard cutting tool only, if increase an arris belt or radius of circular arc of point of a knife, can decrease or go by hand elliptically burr working procedure. Mix for contented and strict dimension public errand the surface is bright and clean spend a requirement, final user also may need custom-built cutting tool. Drape citing says, "When milling machines the groove with wide 5mm, if use milling width and its most adjacent 4mm standard milling cutter to machine, take a knife twice with respect to need, need longer treatment cycle time thereby, produce a few jackknife milling parts likely, and this is the surface bright and clean spend requirement place unallowed. Accordingly, must use the special milling cutter that can walk along a knife to complete treatment. " the special and compound cutting tool that tool manufacturer often needs a design to be able to complete a variety of treatment with a cutting tool. A reason is OK machine cycle time through cancelling to change a knife and shorten. Another reason is to change knife manipulator to may do not have odd room and need to have additionally one kind of treatment. Hughes citing says, for treatment one kind is not groovy workpiece profile, greenleaf company ever designed a kind of razor blade to be located in the special milling cutter of 8 different axial and radial position for the user, with compare with treatment of many standard milling cutter, this kind of special milling cutter can decrease 8 times to take a knife. The Ross Wegryn-Jones of TMFM company selling manager that produces milling cutter of keyway of special hard alloy and figuration milling cutter technically thinks, in muti_function compound cutting tool is not essential condition to fall, the user is willing to use single function cutting tool more normally. He says, "We still basically develop the special cutting tool of single function, other treatment is relied on change a knife to finish. Compound cutting tool is put in a few blemish, cut in order to get / compound cutting tool is whorl milling exemple, when the cutting tool life that gets share of milling of whorl of the dispenses that cut a ministry when its is abhorrent, quite headachy. " Hughes points out, to improve the treatment performance of existing and special cutting tool, the user may hope to redesign a kind of special cutting tool. He says, "The processability that is not all and special cutting tool can be same, and this is the place that seasoned tool supplier can think the user provides a help. " besides improve existing cutting tool beyond the design, when change be producinged by treatment workpiece, or use other when replacing treatment plan, also need to redesign special milling cutter sometimes. Drape says, "Although need to undertake very small modification only, we also can consider to design new special milling cutter. " he points out, the business that this company has 40 ％ about is to design special cutting tool. "If alter not quite, we will retain same cutting tool number, revise its dimension. But, even if subtle modification, make cutting tool function rises significantly possibly also. " no matter the purpose of custom-built and special milling cutter wheres, the case that uses its at small lot treatment is rarer, the initiative cost because of special cutting tool nearly always prep above -- it is sometimes greatly prep above -- standard cutting tool. However, although large quantities of quantities machine the applied target that is special cutting tool, but the concept of batch does not have fixed pattern. Drape explanation says, "Large quantities of quantities are machined and not certain have to is millions spare parts. If be in aerospace manufacturing industry, machine 50 component to may calculate large quantities of quantities to machine, these component may be very big, need again and again is machined repeatedly. Machine a component to may need to use up 10 razor blade, compare with the craft photograph previously, machine this kind of workpiece to have challenge sex quite. " fall in other condition, change to pass cutting tool data will improve productivity, also need to redesign special cutting tool. An example is, the user of hob of original use high-speed steel or figuration cutting tool hopes to pass change hard alloy cutting tool and obtain faster cutting speed. However, replace high-speed steel cutting tool to always can not raise cutting rate with hard alloy cutting tool. Wegryn-Jones says, "A lot of moment, we are awaiting an user to have the new-style machine tool that can use hard alloy cutting tool. The problem is, they are applying to high-speed steel cutting tool only in used machine tool, make our hard alloy cutting tool does not have the ground of use force. The biggest limitation that we encounter is, the machine tool of the user is not the new-style machine tool that increases need of cutting speed place. " Wegryn-Jones points out, TMFM company often can change technology through actor, make the user need not invest buy new treatment facility. For example, can go up in machining center milling appearance of a few keyway, and need not spend money to buy broaching machine. However, the user is right machine tool (especially mill / the vehicle is complex machine tool) process capability may have a few unrealistic hope. He says, "This kind of machine tool has milling function, but it uses ER 32 main shaft, can install the knife handle that places 20mm only greatly most, because this does not suit to use hard metal but dislocation milling cutter, can use milling cutter of integral hard alloy only, we are designing this kind of cutting tool now. " Accavallo points out, what change a knife to may extend treatment cycle time greatly to those is muti_function machine tool, the special and compound cutting tool that the design can complete a variety of treatment at the same time especially advantageous. Accavallo says, why to no matter use,plant treatment machine tool, before Shanteweikekeleman is designing special cutting tool, the power of metropolis computation machine tool and torque ask. He says, "If the cutting tool of our design is right demand of machine tool power is exorbitant, or cannot satisfy the surface bright and clean spend a requirement, or treatment cycle time is too long, or put in any small flaws, we can redesign cutting tool. When we offer a solution to the user, must ensure its effective. " Drape illustrate the practice of HORN company: The milling that 20mm of deepness of cutting width 10mm, cutting undertakes on the machine tool that an user hopes to use 40 taper main shaft in is machined, to overcome the confine with insufficient power of this machine tool, this company foundation the function condition of machine tool itself, wide to cutting, cut mix greatly treatment craft undertook optimizing. He says, "We will be cut wide reduce for 4mm, what 20mm uses when taking a knife every time is complete cut deep, next all razor blade equidistant crisscross is arranged. We still are in of this machine tool most exterior cutting rate raises inside high-power limits, adjusted feed rate according to the load capacity of machine tool main shaft. " Wegryn-Jones says, when whorl milling or figuration milling, what TMFM company cares more is not the size of machine tool power, however machine tool can pressure of bear of susceptive side direction. Cutting tool exceeds datum line further, pressure of harmful side direction bear is greater. To reduce pressure of side direction bear, TMFM company can design a kind of special milling cutter that uses a tooth form account, take the material amount that knife place excises in order to decrease every time. Hughes expresses, rise ceaselessly as what the machine tool machines function, use standard milling cutter also can obtain very tall productivity, the case that must use special cutting tool according to traditional idea will less and less. "Nevertheless, greenleaf company is cooperating with a lot of users, the design can raise the special cutting tool of productivity. When economic atmosphere improves, those are in manufacturing industry is small the enterprise that time vacates to analyse and improve treatment technology when confusing will be occupied in competition first machine. " the target component that tool manufacturer pays close attention to mainly when custom-built and special milling cutter each are not identical. According to Introduction Wegryn-Jones, besides cutting tool of integral hard alloy, TMFM company emphasis is custom-built and special bit is not cutter hub. And the Hughes of Greenleaf company points out, this company is normally around standard razor blade custom-built design cutter hub, nevertheless, they also were designed a lot of can install the special razor blade on special cutter hub. Shanteweikekeleman's stylist people also design the cutter hub that can install standard razor blade in effort. Accavallo says, "Because bit is the component of the easiest attaint in treatment,this is, need often changes. Stylist must undertake choosing from inside designing a large number of production bit for special cutting tool or other utility, try to install its cutter hub to go up. " Drape expresses, although be compared with bit photograph, the use time of cutter hub is longer, but the idea that thinks cutter hub need not change is a kind of misunderstanding however. He says, "Like bit, cutter hub also is met invalidation, they can lose precision gradually as the elapse of time. " Drape points out, although HORN company is trying to exhaust may much standardization component will assemble milling cutter, but still can design milling cutter according to the special requirement of the user, include to be custom-built cutter hub and razor blade to design special clip to hold system and the special arbor with machine tool form a complete set. "Everything depends on what kind of cutting tool can give the work that accords with a requirement with treatment of totle drilling cost. "Everything depends on what kind of cutting tool can give the work that accords with a requirement with treatment of totle drilling cost.. CNC Milling