A: after the steel quenching processing cutting tool: if it is A single occasional production, available suitable grade of common cemented carbide cutting tools for processing, if the batch machining hardened steel, according to the hardness of workpiece and machining allowance in coating cemented carbide, ceramic cutting tools, CBN cutting tools in use in the three kinds of cutting tool materials. 1, coated carbide tool, suitable for machining of hardness under HRC45, to relatively low speed cutting,

2, ceramic cutting tools: suitable for machining of hardness in HRC40-55 degrees, but as far as possible avoid intermittent cutting.

3, CBN cutting tools: the hardness after quenching is most suitable for above HRC55 hardness of workpiece, cubic boron nitride cutting tool is divided into two kinds, general turning welding composite cubic boron nitride cutting tool depth below the 0.3 mm is better. (data from valin superhard company's web site, reference to indicate the source)

Note: turning depth of 0.3 mm or more, or have intermittent machining hardened steel may consider using integral cubic boron nitride blades

B: processed set of high hardness, deep hole and with oil groove if adopt to car generation grinding machine tool, fixture, cutter bar, blade, have special requirements, when turning, the feed processing high cutting speed cannot be smaller, otherwise prone to get knife, knife, tool wear, the hole tolerance is also difficult to guarantee, such as plus and efficiency rather than grinding tool cost, artificial cost will increase a lot. Or with grinding advisable, can consider to improve the efficiency of grinding, such as using CBN grinding wheel, the hard alloy grinding rod, improve grinding several degrees, frequency or equipment, control heat treatment deformation decrease grinding allowance.

C: can work HRC65 quenching hardness steel cutting tools must be:

1, first you work piece is sufficiently round straight before processing?

If not leave 5 wire grinding quantity is not enough, want to amount to 20 silk mill do not car

2, whether you car milling jig have enough rigidity and precision if not leave 5 wire grinding quantity not enough, want to get a clamp

3, tool rod is imported with damping will have better relatively, but the price does not poor. Also feel that your words also don't need to look down.

4, the blade is ceramic, porcelain, CBN, almost YS8, 726. YH1. First disprove CBN, maximum cutting resistance, using CBN must first have a very good machine tools and cutting tools rigidity, your knife shaft no. Let the knife is very severe, even if you live tool rod blades have to car several knives, better not car. Porcelain gold processing not over 60 degrees, the ceramic is more brittle than CBN, cutting resistance as big as CBN, plus you are intermittent cutting, the result is the CBN make knife, ceramic knife, YS8, 726 YH1 and processing of cutting resistance, the least but also the most not wear-resisting, have very good tool rod and the time is worth a try. Try YS8. The blade Angle is very test technology, you have no experience in this field

5 what is your workpiece material? The technological process of didn't you say? Whether to buy raw materials back rough machining ~ ~ semi-finishing ~ fine grinding heat treatment? Or take back just fine grinding

If it is to buy raw materials back to finished goods more problems, control heat treatment deformation and straightening is also learned.