Dish the turning of spare parts of form thin wall

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  • source:MARSTEN CNC Machining
Graph 1 graph 2 graphs 3 producing actual medium dish of form Bao Bi spare parts application is wider, if pursue,1 is shown. Because work is poorer, tigidity is poorer, the cutting that uses convention machines a method, suffer axial cutting force and hot metabolic effect, workpiece can appear bend be out of shape, very inaccessible technology asks, product percent of pass is extremely low. Accordingly, the treatment method that devises an effective is very necessary. The author is in manufacturing practice, made a lot of attempts, introduce everybody now. We ever used traditional method, use inside aperture and end panel fixed position, f80-0 of the circle outside be being machined first.

30, again Che Youduan face comes long 5-0.

15; Tune holds clip, rework F55-0.

20, grow 3-0.

12. The treatment of this kind of method fares badly as a result, appeared to be like what the graph shows 2 times to be out of shape circumstance. 1 practice analysis is machining the circumstance with changeless craft to fall, change the point of view of a few cutting of cutting tool only, be like the horn before increasing in order to reduce axial component of force. Result deflection is reduced somewhat, but flatness still requirement of short of technology. The method that with around two knives process this work at the same time (the graph shows) 3 times. The workpiece after treatment is out of shape dinky, flatness accords with a requirement, percent of pass is in 96% above. Treatment of workpiece of 2 particular operations is in much knife undertakes on automatic lathe, main shaft rotate speed is 960r/min; Right planar knife is installed at before on tool carrier, with Yu Youduan the face is machined; Left planar knife is installed after on tool carrier, use at the end panel inside treatment and F55-0.

20 outside round; Adjust time of movement of tool carrier of good from beginning to end, make around two knives touch workpiece begins cutting at the same time. Wait for treatment to come requirement measure, retreat knife extensive to recover from an illness respectively; Material of two razor blade all is W18Cr4V, arbor material is 45 steel; Parameter of cutting tool geometry reachs knife of cutting dosage right plane: Before horny G=14 ° , hind horny A=3 ° , ° of Kr=95 of tool cutting edge angle, deputy slant horny Kr=4 ° , ° of blade dip Ls=-2, fore-and-aft wide 4mm of the chamfer that break bits. Cutting dosage Ap=0.

4mm, f=0.

25mm/r, vc=200mm/min; Left planar knife: Before horny G=14 ° , hind horny A=3 ° , deputy before horny G=16 ° , deputy hind horny A=8 ° , ° of Kr=95 of tool cutting edge angle, deputy slant horny Kr=0 ° , ° of blade dip Ls=0, transverse wide 4mm of the chamfer that break bits. Cutting dosage Ap=0.

4mm, f=0.

25mm/r, vc=200mm/min. 3 conclusion used this law to score a success, basically be the horn before choosing bigger cutting tool, make axial cutting force drops, reduced cutting force and heat in metal cutting to be caused to the influence of workpiece be out of shape; Use from beginning to end two knives at the same time cutting, volume of power of two knives cutting is similar, way is opposite, make the axial join forces of two knives is basically 0, workpiece suffers cutting force metabolic to affect minimum; When cutting, two knives are contacted with workpiece from beginning to end, go up somehow the treatment stiffness that improved work, reduced metabolic possibility, assured to machine precision thereby, improved manufacturing efficiency at the same time. CNC Milling