The respect is machined in component, the scale that Kong Jia is versed in place is occupied still very tall, the technique that processes about efficient, high accuracy aperture develops tendercy to also suffer everybody to pay close attention to fully. The near future, the rapid development as a result of skill of Kong Jia work and product, make the Kong Jia such as broach of coating hard alloy, reamer is versed in the use quantity of cutting tool increases substantially.
The cutting blade appearance of broach of coating hard alloy already got optimizing, aim to raise its to machine function. For example, of the vertex angle in broach, horizontal blade long grind, use straight power (as same as arbor establishing mill diameter) the consideration that waited for a respect to undertake perfecting.
Use reamer to have the side such as the finish machining of aperture, treatment that uses whorl to establish milling cutter to have whorl opening, the way that raises treatment speed and precision forward likewise develops, make cutting tool product and treatment means present a diversification.
The article will introduce the newest development tendercy of skill of Kong Jia work.

High speed, high accuracy is gotten cut treatment
In the past, bore treatment basically uses high-speed steel bit, auger cut processing technique to also do not have too big change all the time.
But, increase ceaselessly as the use of broach of coating hard alloy, appeared to get cut treatment high speed to change, the tide that high accuracy turns, and ask considering environmental protection, introduced the technology such as cutting of dry type cutting, half dry type. The new development that Kong Jia is versed in basically behaves for: Broach of ① coating hard alloy can undertake machining with exceeding the cutting rate of 60m/min, came true to need on average a few seconds to be able to machine the high speed bore of an aperture only; ② developed the bit that is used at getting to cut tall hardness steel, make get the tall hardness steel that cuts treatment 60HRC left and right sides to become reality; ③ dry type, half dry type is gotten cut treatment hole depth to amount to broach diameter to make an appointment with the deep aperture of 20 times to already had treatment application; The R form design of blade of cutting of the side outside ④ broach can prevent effectively to be in of aperture piece, entrance place produces burr, surface roughness of surface of wall of ameliorable aperture.
Face of the knife after appearance of broach cutting blade increased the 3rd of planar appearance, make horizontal blade part very small, decreased to get the axial power when cutting.
Although reduce substation of cutting blade ministry to suffer the target of cutting force to agree, but the appearance of broach cutting blade of different manufacturer has distinguishing feature each, present the trend that gives diversification.
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