Turning insert shape selection guide

974Hits2014-04-21 08:52:30　Source:Korloy tools_Korloy inserts,Korloy CNC cutting tools (Shandong) Co., Ltd.

 ■Insert shape and catagories

relationship between insert shape and intensity

The shape of the insert is determined according to the shape and size of work piece, as shown in the figure below.Tip radius (also called knife sharp corners), the greater the intensity, the greater the cutting temperature will be dispersed, besides will increase the normal force of cutting, general is good.From economics, W type and T type because the blade number are available, and the more commonly used (copying general use type V, D), for numerical control lathe, 80 ° C is the most should be recommended.C compared with W type and T type blade, but the blade symmetric reverse installation, so repeated positioning accuracy is much higher.

Key points: (1) Higher intensity inserts are recommended for the blade Angle (nose radius) intensity higher product;
(2) as far as possible, use the generic type C products being strong of performance, and to facilitate future purchases.


■How choose insert size

relationship between insert size and cutting depth

1, the use of cutting edge short blade, fractional processing large cutting depth, the cost will increase.
2, choose the blade length is 2 times the average cutting depth of the blade is more economic.
3 of 80 °, the diamond can achieve 9.5 12.7 mm to 19.05 mm blades cutting depth (blade thickness 6.5 mm, the average of rough machining can handle).
4, cutting depth below 6.35 mm usually choose 12.7 mm blades is more economic
5, the choice of methods and cutting depth on cutting edge length, even single chip cost is a bit high, long a cutting edge of the blade can avoid multiple cutting, low comprehensive cost.From the point of stable machining status, cutting depth of benchmark roughly: 9.525 mm blade cut deeply, 37%;12.7 mm blade cut deeply, 50%;15.80 mm RenPian deeply cut 57%;19.05 mm) blade cut deeply by 67%.In short, the cutting depth of recommended value were 40%, 50%, 60% and 40% respectively.Generally speaking, the cutting knife cutting depth completely close to long cutting is very dangerous, cutting depth is higher than the percentage of cutting, must be particular case is particular treatment.The thickness of the blade according to the blade length has been determined by standard.The choice of chip breaker groove with reference to the follow-up content.

■Main angle and insert intensity

Note 1: the cutting Angle is the Angle between the direction of feed and the cutting edge.In usually outside diameter turning Angle is equal to the Lord for the 90 ° - the main cutting Angle.Main Angle cutter bar as benchmark, strictly speaking has nothing to do with the direction of feed.
Note 2: according to ISO standard, the collocation of the main cutting Angle and the direction of feed has everything from A - Y.(see tool rod type)


■cutting thickness change along with angle cutting 

Main cutting Angle is big, the chip thinning grows wider, the chip load along the cutting edge

■Front angle（Negative·Positive）