The improvement that cuts off lathe tool reachs his to be used optionally

6mm, the D in type is diameter of the workpiece that be cut, the unit is Mm) , knife head ply is small and extend an arm to grow, its intensity, rigid, medicinal powder heat and cutting condition are poor, when cutting approachs work center, part of real work offspring turns into negative worth, cutting force relatively when beginning to cut off, showing increase, regular meeting causes oscillatory, extruding, " Ji knife " or make the appearance such as the knife. For this, must try to improve to cutting off the blade form of lathe tool and structure, and practice course of study already proved, do the result so very good. The form that changes the blade form of cutting tool to cut off blade of lathe tool cutting (blade form) outside dividing intensity of immediate impact cutting tool, still can affect cutting to be out of shape, the change of bits of cutting force, platoon and angle of cutting tool job. Accordingly, need fibrous root chooses proper blade form according to specific requirement. If the graph is shown 1 times,form of lathe tool blade is cut off commonly in production. Place of the flat blade 1a that be like a graph is shown, its blade is ground simple, the work that cuts level off of two end panel, cutting is out of shape small. But part of two point of a knife is small, medicinal powder hot condition is poor, point of a knife is easy wear away, and what cut a layer by Wu Qie is transverse (expand) be out of shape, make easily cut bits to jam between wall of treatment surface chamfer, increased the difficulty of platoon bits, easy cause oscillatory, extruding, " Ji knife " or make the appearance such as the knife. Basically cut off treatment with what reach nonferrous metal at the mild steel with not intensity, tall hardness. High-speed steel cuts off lathe tool general wear this kind of blade. Place of the monocline blade 1b that be like a graph is shown, when workpiece will be cut off cutting blade is cut gradually, reduced post of core of remain of workpiece core ministry, but because of its the F of horizontal component of force of cutting force can make knife head to tailstock direction deflective, cut center of workpiece end panel inside sunken. Monocline blade cut off Dao Kuowu cut to provide kind of part. Double transfer place of the blade 1c that be like a graph is shown, in flat blade model place of two point of a knife is ground piece slant horn is ≈ of B of 45 ° , length B/5 (B is a knife head width) transfer twice blade namely geminate transfer blade. You Wuzeng became big horn of point of a knife, the intensity of cutting tool and medicinal powder hot circumstance gets ameliorative, gao Dao of advantageous Wu Di has life, comfortable Wu Jia is versed in the steel of the moderate strength such as carbolic steel, tool steel expects. Blade of cutting of broken line form (Ping Jianren) place of the 1d that be like a graph is shown, it uses one knife much blade to decompose cutting, flat advocate the point of a knife with on cutting blade two the weakest intensity is in wear blade of two inclined cutting, make horn of point of a knife increases 150 ° , the included angle between two inclined blade and blade of two deputy cutting also becomes ° of 118 ° ~119, increased point of a knife already intensity and medicinal powder hot condition, also reduced the cutting negative charge on length of unit cutting blade. Graph the parameter of blade of cutting of form of 2 broken line by at the horn before it is certain to go out should be ground on cutting tool, two inclined blade meet reason form P of λ of dip of two negative blade naturally, if the graph is shown 2 times, make thereby of common and flat blade pure push cutting to turn into a paragraph of small Ping Ren is pushed cut the inclined cutting that cuts action with the shave since two inclined blade, ping Ren rises when cut off conduct action, and the horn before inclined blade can increase actual cutting, make blunt round radius reduces cutting blade, point is more sharp, make cutting obstruction is reduced thereby. In addition, go up because of two skew blade cut bits to want direction of blade of perpendicular Wu Dao to pour out of, the cross section cutting bits that can make form so is contractive, width narrow, squeeze not easily between the two chamfer wall of workpiece, the eduction of bits of advantageous Wu Qie. The parameter of blade of cutting of broken line form is desirable for: B=a ≈ B/3 (B is knife head width) , κ R=30 ° , b=b/cos κ R1. Paragraphs because the length of two inclined blade is big Wu Yi is small make the same score straight blade length, formed a kind so " give priority to with shave, push cut for deputy, push shave and use " new-style cutting means. The material such as medium carbon steel of cut of force of this kind of blade comfortable Wu Jiang and alloy steel, cut workpiece end panel also relatively level off. Company of Nextpage graph 3 SANDVIK cuts off a knife hard alloy razor blade classifies double inclined blade model (person handwriting) place of the 1e that be like a graph is shown, it is graph 1d blade model in the special case that cancels a paragraph of small flat blade. It makes full use of when cutting the principle of bevel angle cutting, strength of industry of comfortable Wu Jia the metal with tall, big tenacity, if add up to golden tool steel, high-speed steel,reach not the material such as steel. Graph 1f gives a R=0 to be ground again on double inclined blade.

The blade that 5~1mm takes roundlet arc chamfer, in workpiece apparently form muscle of protruding of a cirque form, direct with disappear display vigour is used since. Place of the fastigium blade 1g that be like a graph is shown, it is impulse withstand, have relatively high strenth, comfortable Wu Jia is versed in all sorts of not temper cast-iron, white iron and the workpiece such as 6 angle iron. Place of the step blade 1h that be like a graph is shown, it can with bigger feed cutting steel of of all kinds carbon is reached not the material such as steel. Its are main the characteristic is cutting tool directs performance of the bits that reach cent is good. Place of the circular arc blade 1j that be like a graph is shown, cutting tool life is tall, in same treatment the condition falls, the cutting rate that can cut off lathe tool than common and flat blade rises 20 ％ left and right sides, dan Ren grinds difficulty, basically be versed in with Wu Jia all sorts of roundlet arc workpiece. Place of the concave side blade 1k that be like a graph is shown, it is to be in graph 1j blade before small diameter of the reoccupy on knife face (small at 50mm) emery wheel is repaired grind piece approximate the dambered surface of completely sunken form at 30 ° , because of before part is larger, reason is comfortable at the material with treatment spy agglutinant soft, be like axis of balata platen, rubber kind and soft lead, aluminous, plastic etc. Graph place of the blade of 4 geometrical parameter rows of tiles on a roof that cut off lathe tool 1l that be like a graph is shown, comfortable Wu Jia is versed in all sorts of brittleness material. Its characteristic is to be able to make what splatter formerly drossy be out of shape, curly become state of rows of tiles on a roof and break off, safety in operation and powdery bit is little. By go up knowable, afore-mentioned all sorts of blade form total characteristic is aggrandizement point of a knife, reduced the cutting negative charge on length of unit cutting blade, make a bits successful, it is certain to still have fight display vigour to use. Must point out, at present hard alloy razor blade is in our country this respect very not complete, all sorts of blade form must rely on handlers handiwork to grind piece, character assures hard, and abroad already had hard alloy to cut off like Swedish SANDVIK company (groove) the razor blade of form of 8 kinds of blade of lathe tool is chosen for the user, if pursue,3 are shown. If the graph is shown 4 times,the geometrical parameter that chooses cutting tool correctly cuts off the geometrical parameter with main lathe tool. Graph the horn before the action of bevel of 5 bits chamfer: Before horny γ O is mixed to make blade is ground measure convenient, cut off lathe tool to give out only normally on feed direction before horny γ F. In F of γ of O= of the γ on flat blade. Below the premise that horn allows in cutting tool intensity before, answer to take big cost as far as possible. When processing medium carbon steel, hard alloy cuts off lathe tool before horn, take ° of 10 ° ~20 commonly, high-speed steel cuts off lathe tool desirable ° of 15 ° ~25. For control the appearance that cut bits is mixed make a bits successful, often be in those who cut off a knife before a form of linear circular arc is ground to coil on knife face bits chamfer (graph 4a) or circular arc form coils bits chamfer (graph 4b) . R of circular arc radius reachs a W of bits chamfer width to want to be decided according to the workpiece diameter that is cut off. In addition, had better coiling a τ of a bevel is ground on bits chamfer (desirable 10 ° ) , pour out of to lathe tailstock direction with making cut bits (see a picture 5) . To strengthen cutting blade, prevent to hit a knife, can grind on the crucial point that hard alloy shears lathe tool give a Br1=(0.

4~0.

Of 6)f and ° of ~-20 of γ O1=-5 ° lose edge, the F in type is feed. Graph 6 on clip of the machine that press type cuts off part of lathe tool offspring: Offspring part should use little value as far as possible, in order to enhance cutting blade and the vibration when reducing cutting. Take ° of =2 ° ~6 normally. Sometimes, still grind in point of close cutting blade give a paragraph small wide for 0.

1~0.

What part of 2mm, offspring is 0 ° is narrow arris face (first flank) , in order to increase damp, reduce the vibration when cutting. To avoid to weaken knife head intensity overly, the deputy offspring part that cuts off lathe tool to go up commonly can pledge according to different capable person: α O=1 ° 30 ' ~2 ° (high-speed steel) α =2 ° 30 ' ~3 ° 30 ' (hard alloy) . Slant horn: The size of tool cutting edge angle decides Wu Ren form. Flat blade cut off ° of knife κ R=90, double inclined blade go up κ R=60 ° . Do not take rudimental core post when workpiece core ministry when, ° of ~80 of κ R=75 ° . Nextpage pursues 7 from clip of the machine that lock up type hard alloy razor blade cuts off a knife deputy slant intensity of size influence cutting tool and tigidity, because accept the restriction of dimension of knife head width, what cut off lathe tool to go up commonly is deputy slant ° of ~2 of ° of horny κ R=1 (high-speed steel) ° of the R=1 that reach κ 30 ' ~3 ° (hard alloy) . Improve the structure that cuts off lathe tool to choose to cut off lathe tool to press its type of structural cent whole, solder type and machine clip type 3 kinds. High-speed steel cuts off lathe tool to use integral formula commonly. Solder clip type basically uses type and machine to go up at hard alloy lathe tool. Graph hard alloy of 8 new-style coating cuts off bit to solder although have a structure,type cuts off lathe tool simple, at make, bit and cutter hub join reliable, blade is ground convenient wait for a characteristic, but hard alloy razor blade is soldering the regular meeting in the process produces crackle. And use machine clip type to cut off lathe tool, the bit hardness that because high temperature solders,can avoid to cause drops and produce the limitation such as crackle, can improve the service life of cutting tool. The machine mix that produces by national level GB/T10953 at present cuts off lathe tool to be used on the structure that press type. The graph is shown 6 times to go up clip of the machine that press type cuts off lathe tool, it uses underside to be the Q of form of V of 120 ° protruding razor blade, through bolt and pressing plate from on be down impaction razor blade, pressing plate front can set solder hard alloy serves as bits implement. Bit grinds after again, come back move bolt 8, drive push rod 6 shift will adjust edge position. Its defect is edge it is straight, and before knife face is plane, cannot make cut bits transverse generation systole is out of shape, easy with already machined exterior attrition, the Yi Ka that cut bits is inside groove and cause dozen of knife. The graph is shown 7 times to lock up type oneself adjustable diametical machine places hard alloy razor blade to cut off a knife. Of bit on fixed position face or face of fluctuation fixed position are 120 ° inside face of sunken V shape, and fluctuate fixed position face is not parallel, form wedge. Knock bit knife chamfer with rubber hammer inside. When cutting off, below radial load action, bit is reliable ground wedge close inside knife chamfer. This is a kind of structure is more new-style cut off a knife, direct suppress gives bits slot on bit, its chamfer form can make cut bits transverse generation is contractive and narrow, avoided the card that cut bits to live inside groove, make bit disintegrate. Knife of Xiang Yu the Conqueror of graph 9 HELIGRIP size range of pipe bent in last few years, hard alloy of a kind of when ISCAR company rolls out new-style coating cuts off bit (razor blade of HELIGRIP Xiang Yu the Conqueror) , got the favour of people. If the graph is shown 8 times, it is made into dicephalous, wear away directly after but dislocation is used. This kind of razor blade used dosage of right choice cutting and cutting liquid chamfer of three-dimensional curved surface, the range that break bits is wide, adaptability is good, can at the same time applicable Wu Qie is broken, grooving of profile modeling turning, grooving, the circle outside the car, end panel, bore hole, the chamfer inside boring and car end panel differ 8 kinds formal treatment, if the graph is shown 9 times, enlarged bit application limits thereby, reduced the inventory of cutting tool greatly. The graph cools inside 10 high pressure cut off lathe tool to choose cutting dosage and cutting fluid correctly, the service life that cuts off a knife to rising is very important also. Feed is normally desirable F=0.

1~0.

Speed of 5mm/r; cutting is desirable VC=10~30m/min(high-speed steel) reach) of VC=50~120m/min(hard alloy. Use when cutting off lathe tool, must make center of work of cutting blade alignment high, blade of cutting of the two side when blade is ground must symmetrical, cutting fluid is supplied the beard is sufficient, emulsion of pH indicator of ％ of 5 ％ ~10 can be used when cutting steel. Conditional when, can use liquid of high-pressured supply cutting (see a picture 7) , the effect is better. It is those who prevent cutting fluid to splatter reach inject not divide evenly, when use hard alloy cuts off a knife, also but need not cutting fluid. Abroad still rolls out a kind to use the refrigeration inside high pressure recently from wedge the hard alloy that tighten type cuts off lathe tool new structure, if the graph is shown 10 times, particularly comfortable Wu Gao the difficult treatment material such as alloy of fast treatment high temperature. CNC Milling CNC Machining