Ni radical is out of shape the experiment of torque of tap of alveolus of high temperature alloy studies

5Fe-19Cr-3.

1Mo-5Nb-Ti-Al, among them Ni content is amounted to 52.

5% . The σ of room temperature intensity of alloy of GH4169 high temperature 0.

2=1180MPa(is equivalent to Inconel718) , use temperature amounts to 650 ℃ . As a result of commonly used at making eddy rotary table, because this calls eddy turntable alloy again. The cutting processability extreme difference of high temperature alloy. Be like with opposite at normalizing condition the cutting processability Kv=1 of 45 steels is measured, the cutting processability Kv=0 of high temperature alloy.

5 ～ 0.

2, kv is the cutting processability of alloy of Ni radical high temperature about 0.

2. Is the cutting treatment characteristic of alloy of Ni radical high temperature basically behaved for: ? Xing Yang low-lyingponds not び of Xi  commonplace not  shows Ji of Υ of condyle of Xing of stand upright  also ǘ   however Zhe of ニ of poisonous Qin of  of Lu of sparrow of dew of Chi of Xi  Xing shows  of ぞ of commonplace of stand upright  group ash of bank of persimmon of Ma of disclose rice huller I of Zuo of T of makeup V ぁ base, main show is tap torque big, cut bits easy jam, discharge bits difficulty, intensity of diameter of tap core ministry is insufficient, tap dies easily to age or break off. The craft difficult problem that makes thread is attacked on alloy of Ni radical high temperature to solve, the article uses correction tine tap and standard machine to used tap to undertake to workpiece of alloy of GH4169 high temperature alveolus tap experiments respectively, studied the metabolic law of tap torque. 2 alveolus tap experiments 2.

1 test specimen material Ni radical is out of shape GH4169(of high temperature alloy originallies dissolve condition) , hardness 35HRC, ply 10mm(2d) , Ø4 of bottom outlet diameter.

25mm. 2.

Machine of level of high-speed steel M5 of ① of 2 experiments cutting tool uses tap (Chan Zhui) , do cutting: ② high-speed steel M5 amends tine tap (cone angle is 5 ° and 7 ° 30) respectively. 2.

Type of muscle of thin stand like a wall of 3 experiments instrument gets cut the appearance that measure power: Number displays gift of meet an emergency of YD-21 dynamic resistor: HY6022 data collects card: The micro computer calculates machine. Graph does 1 tap torque measure test system sketch map to pursue does 2 tap torque measure result κ R: ? Does aperture wrap up: of δ of? of superintend and director of that Xing beard? Does aperture wrap up?: of lead of superintend and director of Mu acute hearing clam? Does aperture aspic Dang call? α 1: ? Does Dang of Yan shoot a glance at call?RY: ?

If the graph is shown 1 times,torque of tap of 4 tests system surveys test system. 2.

If the graph is shown 2 times,the tap torque when 5 tests result uses standard tap and two kinds of correction of different cone angle to age tap undertakes tap experiments respectively measures an outcome. Analysis of 3 tests result is shown 2 times by the graph measure an outcome knowable, below identical cutting condition, 20% ～ were reduced when the tap torque when cutting of correction tine tap compares standard tap cutting 40% , use ° of R=7 of κ of cutting cone angle especially torque of the tap when the cutting of correction tine tap of 30 reduces scope bigger (40%) . In diameter of tap core ministry same situation falls, tap torque is reduced be equivalent to section coefficient increasing, can reduce tap to break off significantly thereby probability, improve tap service life. The account that uses correction tine tap to be able to reduce tap torque significantly is machining a principle at its (3) seeing a picture. By the graph 3 knowable, α of horn of tap tooth form 0 be less than α of horn of whorl tooth form 1, because tooth of the tap when this tap ages 0)/2 of α of 1- of α of Ø=(of horn of a backlash is formed between flank and treatment whorl flank, because tooth ages side with the part that the ply on the whorl flank of cutting is R) of κ of α 0/2+ of RY=Psin κ R/cos(is conterminous touch, others does not connect with the whorl profile that cuts completely touch, because this reduced attrition torque greatly. Because of torque of cutting of = of tap total torque + attrition torque, chafe so of torque reduce mean tap total torque to reduce namely, and be helpful for cutting fluid producing cooling and lubricant effect adequately. Contact ply formula by tooth flank R) of κ of α 0/2+ of RY=Psin κ R/cos(is knowable, value of R of κ of tap cutting cone angle is greater, RY of osculatory ply value is bigger also (namely cutting ply jumps over big) . The dimension effect according to cutting force is knowable, cutting ply is bigger, unit cutting force is smaller, in cutting area particular case falls, total cutting force is reduced mean cutting torque to reduce, namely tap total torque is reduced. From this knowable, r of κ of cutting cone angle is bigger, tap total torque is smaller, the verdict of this and document is unanimous. Accordingly, the tap total torque of the cutting of correction tine tap that with κ R=7 ° the correction of 30 ages ° of the R=5 that use κ is compared when tap cutting is reduced 20% the left and right sides. 4 conclusion are right when Ni radical is out of shape GH4169 of high temperature alloy undertakes alveolus tap is machined, use correction tine tap to be able to reduce tap total torque significantly than using standard tap. Accordingly, correction tine tap is the effective tool that solves tap of alveolus of high temperature alloy to machine difficult problem. In tap cutting cone angle inside optional limits, the correction tine tap that uses bigger cutting cone angle can achieve better treatment result. The mechanism that correction tine tap can reduce tap torque depends on making tooth flank attrition is reduced, ply of every tine cutting increases. CNC Milling CNC Machining