Numerical control but the circular arc of point of a knife of dislocation car razor blade and radius compensation application

8mm. If pursue 1, although think lathe tool point of a knife is commonly advocate the node of deputy cutting blade (P ˊ ) , but the existence as a result of circular arc of point of a knife, although be opposite,fact of this point of a knife is; of dot of the fiction outside nonexistent cutting tool when the knife, general an as tangent as edge X, Z to linear node (P) calls pair of knife point of a knife, the knife that cutting tool represents in often regarding cutting tool, workpiece as opposite motion with it dot, namely on process designing contrail move a point, but this is to fact of knife point of a knife also be nonexistent, also be an empty dot, a problem that this causes is: Knife the workpiece outline that the process designing contrail that chooses a location and cutting tool cutting form always does not agree, the source that generates machining error from this is: Negligence advocate, the circular arc of point of a knife that the fact between deputy cutting blade exists. Why does the circular arc of point of a knife of car razor blade exist? How to undertake to size of circular arc of point of a knife craft chooses? How to solve the problem that cannot represent outline of cutting tool cutting to contrail of knife point of a knife? These are application but the problem that dislocation lathe tool executes CNC Turning to must be solved. 2, the existence of circular arc of point of a knife of car razor blade and craft choose (one) if the existence reason of the circular arc of point of a knife of razor blade of numerical control car pursues 2, advocate, deputy slant horn and the sum of horn of point of a knife are 180 ° , 3 person mutual change, cutting tool of the surface roughness that affects treatment surface, influence is right of systematic stiffness suit, life of influence cutting tool. Reduce advocate, deputy slant horn, can reduce already machined height of exterior remain area, reduce exterior surface roughness to be worth, raise exterior quality; to reduce advocate, deputy slant horn increased role of point of a knife, can raise point of a knife to suffer strength strength, make come loose hot property ameliorates, be helpful for raising the durability of cutting tool. Point of a knife is the position with whole the weakest cutting tool, the intensity difference that point of a knife is in, come loose to wear away hot condition difference, easily, it is outstanding contradiction, look from this angle, hope to reduce admittedly advocate, deputy slant horn. A few elements were restricted again advocate, deputy slant the likelihood that horn reduces. Reduce tool cutting edge angle, total cutting force the component of force on direction of penetration of a cutting tool (back force) increase, reduce deputy slant horn, can increase deputy hind the attrition between knife face and workpiece, advocate, deputy slant of horn reduce go against systematic stiffness, cause vibration and treatment easily to be out of shape; is restricted another times advocate, deputy slant the account that horn reduces is, should not make when cutting workpiece cutting tool advocate, outline of workpiece of interference of deputy cutting blade. Visible, advocate, deputy slant horn is added, decrease each to have advantages and disadvantages, if be in advocate, transfer with circular arc between deputy cutting blade, form circular arc of point of a knife, can yet be regarded as solves the eclectic choice that has contradicted one kind, on one hand it raised cutting tool durability, on one hand cutting tool can increase appropriately advocate, deputy slant horn makes cutting suits to systematic stiffness good, and rudimental area height is reduced on certain level, be helpful for machining exterior quality. (2) the radius of circular arc of point of a knife of razor blade of car of craft choice numerical control of the circular arc of point of a knife of razor blade of numerical control car is important choice parameter. The radius of the commonnest circular arc of point of a knife in turning and boring is: 0.

4 ㎜, 0.

8mm, 1.

2 ㎜. When the size that chooses radius of circular arc of point of a knife, craft considers to have the following: (Radius of circular arc of 1) point of a knife is unfavorable the smallest radius that is more than outline of spare parts sunken form, lest produce treatment to interfere; ,this radius shoulds not be again the choice is too little, because intensity of its knife head is too weak,meet otherwise or cutter hub comes loose heat energy force is poor, make lathe tool damages easily. (Radius of circular arc of 2) point of a knife should suit with the biggest feed, appropriate of radius of circular arc of point of a knife is more than 1 what be equal to the biggest feed.

25 times, will worsen otherwise cutting condition, appear even whorl shape face and hit the problem; such as the knife on the other hand, want radius of circular arc of apprehension point of a knife again too big flutter happens when bringing about cutting tool cutting easily, say commonly, radius of circular arc of point of a knife is in 0.

When 8 ㎜ are the following bring about radius of circular arc of point of a knife of treatment flutter;(3) and feed not easily to remain to be concerned highly with what machine the surface on geometry, affect the surface roughness that machines the surface thereby. The relation of rudimental height and radius of circular arc of point of a knife, feed can use next type to express: ε of H ≈ F2/8r. In type: Is H treatment remain height? M;f is feed Mm/r;r ε is Mm of radius of circular arc of point of a knife. See radius of small feed, big circular arc of point of a knife, can reduce rudimental height, get small surface roughness Ra is worth. (Radius of circular arc of 4) point of a knife still is concerned with the reliability that judges bits. From break bits to set out reliably, be opposite normally? Grow machines exercise to be able to use radius of small circular arc of point of a knife at car of small surplus, small feed, conversely appropriate uses radius of bigger circular arc of point of a knife. (5) adds man-hour in CNC process designing, if consider the radius of cutting tool circular arc that maintains via measuring, undertake radius of point of a knife is compensated, circular arc of this cutting tool is equivalent to machining cutting of the scroll on outline, production precision of cutting tool circular arc and radius of point of a knife measure precision to ought to suit with the appearance precision photograph of outline. CNC Milling CNC Machining