Bore with a reamer cuts treatment to win new applied field

4301(X5CrNi18-10) and typical V4A steel 1.

4571(X6CrNiMoTi17-12-2) . Stainless steel of this group of austenite is regarded to be the most difficult cutting. This kind of steel is tougher, thermal conductivity is poorer, higher intensity and bring about cold make sclerosis. Because added titanium alloying element (for example material number is 1.

The stainless steel of 4571) can arise when be united in wedlock with carbon special quicken cutting tool tatty titanium changes carbon. As a result of this kind of function of material, when cutting, the respect waits to raise the requirement of many sided in angle of cutting tool material, geometry and exterior quality to cutting tool. In the meantime, the matrix of cutting tool should have higher intensity and better tenacity, the cutting blade of cutting tool should undertake soft cutting. Additional, the cutting wedge of edge should be a few bigger, so that can enough bear cutting force. In addition, still should eliminate smoothly to cut bits from cutting edge, so that can make a process responsible,the ground processes data. Accordingly, use normally big before cutting tool of horny coating hard alloy, very good treatment gain can be scored when milling. Interrupted cutting can arise very short cut bits, cutting edge just also bears lesser load, and can undertake through coating heat insolation is mixed significantly again prevent to wear away. The finish machining that particularly difficult is aperture is machined to aperture, the formation of treatment involves a lot of elements. Here, below the circumstance of the chamfer discharging bits of the cutter hub that has tenacity when cutting tool, larger space that discharge bits, right helix and coating, machining the Kong Shi of most finite deepness, can use the cutting dosage of demarcate, can score acceptability gain. When the finish machining of aperture, it is other one thing. To finish machining, aperture should achieve higher exterior quality, the circularity inside the diametical precision of μ M limits and stricter limits and cylinder are spent, the cutting tool durability that and ensure even can accept, so that but the treatment cost that estimation gives every opening. Especially to much blade reamer (the characteristic of this kind of reamer is the operation when choosing righter cutting dosage quite simple) , when the treatment that is used at material of this kind of more difficult cutting, constant regular meeting is restricted. Normally, the result of treatment is exterior quality poorer (graph 1) , bore diameter dimension is located in the floor level of tolerancepublic errand limits, in cutting tool the spare parts amount that processes inside life period is less, and discharge bits also have a problem. Accordingly, the August Beck company that regards treatment as accurate Home Kong Zhuan (company place where troops are stationed: Winterlingen) will develop a kind to be able to be competent in the light of this kind of special problem the cutting tool of this kind of treatment serves as a target, in order to widen this is planted the size range of pipe bent of cutting tool, incorporate the manufacturing technology of change user. Below the special function case that considers data, the design of cutting tool should satisfy following requirement: The between attrition that reduces cutting tool and aperture has taller stability in cutting tool while, cutting tool still should have the edge angle that is helpful for cutting to avoid to cut bits to jam, if people observes much blade reamer carefully,from inside machining aperture can successful eduction cuts the mutual influence between part of bits cutting edge and calibration part when, the executive meeting that can send these demands on reamer of much now blade gets very big limitation. The functional component of reamer (namely cutting edge part and calibration part) intersect to go up in each edge at the same time, the effect produces each other between this two parts, cut aperture closely to begin as the point of a knife of cutting edge, what have oriented effect to cutting tool in Kong Zhong right now is cylindrical arris belt is contacted with hole wall happening. Area of this kind of contact is larger, so of edge point of a knife wear away bigger, and bring about cutting tool be squashed in aperture. As a result of the deflection of cutting tool, the measure that renders treatment aperture finally is less than cutting tool diameter. If the flexibility of tool material has been jumped over, so this kind of result is stronger. And the hard data grain in material still can be added grind bead to wear away, more accelerated the process that makes machine bore diameter decrescent. After cutting tool uses not long time, this kind of process can make bore diameter reduces 1/100mm left and right sides completely. The development staff of the firm of compromise August Beck that cutting bits shedding, advantageous cutting and stability field had appropriate arrangement in this respect, obtain next exemple positive result: Those who adopt point of view of cutting tool geometry optimize reduced cylindrical the osculatory area between arris belt and treatment aperture, and do not lose oriented function, add use appropriate coating to chafe in order to reduce, prevent to wear away. Graph 2 special fall in the case that decides bits very hard, use much blade reamer to undertake machining, platoon bits often debatable, the geometrical angle that cut bits to become the crucial point of cutting of posse random line on cutter hub still affects cutting force, the wedge part of cutting tool is smaller, so edge is jumped over " keen " , what can avoid to ever happened before more when processing CrNi stainless steel is cold make sclerotic appearance. To much blade reamer, right helix chamfer and the horn before cutting deep way affects advantageous cutting sex greatly, but, right helix chamfer always makes cut bits to discharge bits backward from Kong Zhong, can produce the problem that discharge bits when encountering the case that is hard to decide bits especially (graph 2) . Other risk are, the meeting that cut bits gets stuck, happen to cut bits to jam or be in of aperture apparently slippage and the surface that cut already machined aperture. If go up to cancel helix completely to discharge bits chamfer from cutting tool, so cutting bits to shed the compromise that characteristic, cutting fashions a kind to be able to be accepted between the stability of advantageous sex and cutting blade. And the uses generally tooth on efficient to Beck- reamer differs distributinging buy (this is necessary to making sure the circularity of aperture is) still be unalterable. However the is used at cutting CrNi stainless steel cutting tool to new development, indispensable is to use structure of integral hard alloy and the passageway opening that set interior to offer cooling fluid. For this, beck company was updated already some HNC reamer products, knife handle, cutter hub and cutting edge use hard metal piece make, cutting tool has very tall circumgyrate precision. From reamer aperture of passageway of central cooling fluid is fork of every cutting edge to give an alveolus that connects cooling fluid through electric spark treatment. When processing CrNi steel, because the exit of cooling fluid is endured closely " hot " cutting area limits, can pass what go out from cutting area carry to cut bits to discharge process heat instantly thereby. Pass higher cooling fluid pressure, make cut bits to become fragile and make its break off as far as possible. The data that makes be cut thereby is OK and reliable the ground is rinsed ahead from inside machining aperture go out. Graph the favorable effect that the 3 treatment from furcate spare parts can see new cutting tool up to now the effect is exceeded 100% in applying actually, confirm mode of this kind of cutting tool achieved the result of be convinced making a person. Here, the treatment that can list a furcate spare parts serves as example (graph 3) . On machining center of Chiro DZ 18W Magnum, bore with a reamer cuts the arm aperture Ø15E7 on this component, machine 9mm of × of deepness 2. Component part material is character 1.

The steel of number of this kind of material is 4301(X5CrNi18-10) , contain (the chromium of 17 ～ 19)% and (8.

5 ～ 10.

The nickel of 5)% . Cutting tool outfit is inserted in to transfer evenly in collet, the round jumpy deviation that can make be concerned with the system through this kind of collet reduces 5 μ M. Expand through corrective hydraulic pressure collet can ensure on the machine tool change with constant precision reamer of integral hard alloy. Using cutting dosage Vc=40m/min and F=0.

Below the circumstance of 6mm/r, use this kind of reamer in cutting tool the amount that aperture processes inside life period can achieve 10000. With cutting journey durability of denotive cutting tool achieves 180m, this shows, this exceeded heretofore to use outside the 100/% that buys cutting tool to machine effect. Here, the standard that judges cutting tool durability is the diameter that machines aperture. Other requirements are reliable platoon bits, because, the cutting tool that uses at present, cut bits to often be met winding is on knife handle, often bring about those who machine a process to interrupt. Another treatment example is bore with a reamer is cut be illogical aperture Ø7.

08 +0.

1, workpiece material is character 1.

4404(X2CrNiMo17-12-3) . Use when be machined on lathe (the emulsification lubricating fluid of 12 ～ 15)% , cutting deepness 70mm, cutting tool durability is the Rz2 of surface roughness ＜ with machining the surface will measure. Of new development have the reamer that suits to machine angle of VA material qualitative cutting tool, cutting dosage uses Vc=13m/min and F=0.

2mm/r, what use this is not the cutting tool of coating, machined 500 spare partses about, with cutting journey durability of denotive cutting tool amounts to 35m. Develop new applied field series of structure of this kind of cutting tool, have the capacity that processes difficult cutting data, very typical titanium alloy material, return the material with bouncy lesser modulus, process these data the easy happening that skid or get stuck. Reamer of so called HNC-VA, can improve this kind of treatment apparently. This kind of reamer often can solve appears much to machine a problem. Experiment through craft and change a familiar technology, past contact can develop new applied field. But, the premise condition that obtains this kind of result is efficient the machine tool that works with high accuracy. In this respect, to more miniature production the enterprise also should realise the change of this kind of essential sex. The HNC reamer product that Beck company develops, the reamer of integral hard alloy that cooling fluid offers inside formed the applied basis with a wider range. And can rapid as a result of stock stock offer money, use for the user. Be based on this foundation to go up (be like HNC-VA reamer) the brim field that series developed this kind of special reamer to use bore with a reamer to cut treatment, and an example that treatment stainless steel is domain of this kind of brim. CNC Milling