Summary: ? Tip of of over sixty years of age of forge of department of discharge of デ of heart slaughters Xi of talk in one's sleep to bite makes an appointment with Long of the Wu Ci that lose eddy to be worth protein of bad of of ǎ of Mu any of several hot spice plants to bend over Yu also conceives Qiong U Tuo of aunt of of of В of grapes of administer of excrement of bad of ú of hut location any of several hot spice plants, also be the difficult problem that abecedarian masters harder, the first time blade is ground cut off a knife, always appear such or in that way more question (if pursue,1 ～ shows) 3 times, pass sometimes after correcting, again when blade is ground, often reappear again again show the error in front. Graph the appears easily mistake when 1 blade wears face of the knife before cutting off a knife pursues 2 blade are ground cut off a knife deputy hind the appears easily mistake when knife face (one) graph 3 blade are ground cut off a knife deputy after the appears easily mistake when knife face (2) 2 blade are ground, intensity of its knife head is poor, knife head breaks off easily, be like graph 1(a) . What blade of the chamfer that break bits grinds is too low, cutting of & of the difficulty that discharge bits is not successful, cutting bear increases, knife head breaks off easily, be like graph 1(b) . Deputy hind horny a side is negative worth, the knife is cut off when cutting off deputy hind knife face should chafe with workpiece, be like graph 2(a) . Two side deputy hind horny angle is ground too greatly, knife head intensity becomes poor, head of the knife when cutting breaks off easily, be like graph 2(b) . Deputy slant part is too large, knife head intensity becomes poor, head of the knife when cutting breaks off easily, be like graph 3(a) . Two pairs slant horn is negative worth, yi Zhen knife, cutting difficulty, be like graph 3(b) . Deputy cutting blade is not flat, cutting difficulty, be like graph 3(c) . Cut off knife abrasion too much, normally left deputy hind knife face is ground piece can, cut off knife width surplus to should be put in on the right side of abrasion, otherwise cannot the work that cutting has high-ranking station, be like graph 3(d) . 3 blade are ground cut off law of knife new ability in last few years, the author changed the teaching method that worries a demand for blade with cutting tool angle, and used the common method with geometrical appearance proceed with, not only the introduction is fast, and do not go out slant. Through the experiment, this kind of method not only suit education, and suit self-study particularly. A pithy formula: Before wide hind narrow (make sure two are worth deputy slant horn) before tall hind low (the horn before assuring to have what be worth) go up wide below narrow (assured to be worth twice deputy hind horn) on dash forward next shrinking (the horn after assuring to be worth) , make two deputy hind part is equal) . Or with doggerel: It is not difficult that blade grinds cutting tool, holding figure is crucial. Jian hou mian is narrow come thereinbefore is wide, below narrow will go up bizygomatic breadth. Master semmetry to central line, below retractive go up lead. Want to hold general orientation only, grind a cutting tool able. Graph 4 hard alloy cut off a knife general high-speed steel cuts off the geometrical parameter that 4 general high-speed steel cut off a knife the geometrical parameter of the knife sees a picture 4. Before 30 ° of ～ of ° of horny γ 0=0 advocate hind 8 ° of ～ of ° of horny α 0=6 deputy hind 2 ° of ～ of ° of horny α 0=1 ° of R=90 of κ of tool cutting edge angle deputy slant 1 ° of ～ of ° of horny κ R=1 30 advocate ≈ of A of cutting blade width (0. 5 ～ 0.
6) √ . ～ 3)mm of L=h+(2 of length of D knife head notes: D -- workpiece diameter, mm; H -- penetration, mm 5 suggests the first time blade grinds the common stencil steel that can choose 150mm of × of 4mm × 20mm, make blade harden oneself review respectively in two end, the save labour when be being saved already so, economy. Angle introduces to be worth limits stage by stage again after mastering appearance. Can choose blade of high-speed steel cutting tool to grind after achieving certain competence, can try recessing on workpiece. Be opposite according to cutting off workpiece diameter advocate cutting blade width and knife head length try to decide and try cut off. Blade wears the hard alloy cutting tool stuff that wears harder. Graph 5 blade grind methodological sketch map to add: Does blade grind methodological: ? Heart プ Peng bake Shan sees? two tactics hold a knife, the knife before lathe tool is faced on (5a) seeing a picture, at the same time blade grinds knife of dispatch a vehicle left deputy hind horn and deputy slant horn. Is blade ground on the right side of deputy hind knife face: ? Twist face of the knife before treating lathe tool of small cup? up (5b) seeing a picture, at the same time blade grinds knife of dispatch a vehicle on the right side of deputy hind horn and deputy slant horn. Is blade ground advocate hind knife face: ? Wring treat small cup? to see graph 5c) , at the same time blade grinds knife of dispatch a vehicle advocate hind horn. : of face of the knife before is blade ground? Wring treat small cup? to see graph 5d) , at the same time blade grinds the horn before knife of dispatch a vehicle. Long grind: of point of a knife? Wring treat small cup? to be in blade to grind in point of a knife respectively linear model or circular arc transfer blade. CNC Milling
CNC Machining