问题
问答题
用高速钢切断刀切断直径为100mm的棒料，试计算该切断刀的刀头宽度和刀头长度，如果切削速度选为35m/min，求机床转速。
答案
参考答案：
已知dw=100mm、vc=35m/min
该切断刀的刀头宽度为5～6mm；刀头长度为52～53mm；机床转速为111.5r/min。
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用高速钢切断刀切断直径为100mm的棒料，试计算该切断刀的刀头宽度和刀头长度，如果切削速度选为35m/min，求机床转速。
参考答案：
已知dw=100mm、vc=35m/min
该切断刀的刀头宽度为5～6mm；刀头长度为52～53mm；机床转速为111.5r/min。
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| I have always believed the saying, "Any man can be a father, but it 1 someone special to be a dad." This is true. Since the 2 of my son, Joshua, things have changed a lot in my life, but the 3 have been good! My wife and I have been through many 4 moments which have made both of us stronger. My son was born with a serious breathing problem and he couldn't keep his 5 down. He was put on several different medications, 6 he did not get any better. My wife and I were both told many times by people that Joshua 7 he was born early; he had not 8 much weight since he was born. As time progressed his regular doctor 9 my wife and me to visit Dr. Eid, a specialist in Louisville. He was 10 by my son's condition and so we were sent to Louisville's Children's Hospital. Joshua 11 many different checkups. The 12 spent there was very demanding for my wife and me. But we did make it 13 . Our son Joshua was diagnosed (诊断) with asthma (哮喘), and with acid reflux syndrome (酸回流综合症). After the treatment, his 14 began to improve slowly. Joshua is 1 year and 1 month old now and his progress has been 15 - he is up to 27 pounds now. I keep telling my wife that if he keeps 16 like this he might become a football 17 someday. There is a saying that has 18 me get through these troublesome times, "Problems will either 19 you or break you." When you think the 20 hours are upon you, remember the dawn is just in sight. | ||||
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