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你看看我这个行吗,行的话我给发过去;
论文开 题 报 告
螺纹轴套相配件
分析所给零件的金属切削工艺。
一、根据零件图样分析,选择合理的工件材料,刀具及其几何参数,量具及机床。
二、根据加工工序的划分原则,确定在CK6136数控车床上加工零件,其加工工序的划分应依据零件的具体形状,要求具体分析——先加工套件,后加工轴件。
三、工件的装夹方式应遵循工序集中的原则,尽可能在一次装夹中完成所有工序。
四、依据对刀点和换刀点的选择原则:按保证零件的加工精度和表面粗糙度,方便数值计算,减少编程工作量,超刀路线尽可能短,减少进退刀时间和其他辅助时间,尽量减少空行程,以利于提高生产率。从而确定对刀点与换刀点。
五、切削用量的选择应依据机床的具体状况以及刀具的耐用度,并结合加工实践经验,进行合理选择,以保证有效地进行零件的加工,并能加工出符合零件要求的尺寸精度和形位精度。
六、加工程序的编制应符合零件加工误差的控制。
七、具体加工工艺分析内容如下:
选用设备有CK6136或CK6140选用刀具有93度硬质合金外圆车刀,60度硬质合金螺纹车刀,4mm宽带硬质合金外割槽刀,93度硬质合金内孔镗刀,60度硬质合金内螺纹车刀。选用的量具有0mm-150mm的外径游标卡尺,0mm-25mm的千外径分尺,25mm-50mm的外径千分尺25mm-50mm内径千分尺,M24×2的环规M24×2的塞规。选用的 夹具有三爪自动定心卡盘。
选用合理的切削参数:是采用G99每转进给,93度外圆粗加工时选用转速为800转,切削深度为1mm,进给量为f0.2mm每转,精加工时转速为1000转,切削深度为0.5mm,进给量为f0.1每转,内孔镗刀镗内孔时粗加工转速为600转,切削深度为0.5mm,进给量为f0.1每转,精加工时转速为800转,切削深度为0.2mm,进给量f0.08每转,4mm割刀切槽时转速为280转,进给量f0.0每转,60度外螺纹刀加工螺纹时代转速为1200转,螺纹导程为F2机床进给倍率为100%,60度内螺纹刀加工内螺纹时的转速为1200转,螺纹导程为F2,机床进给倍率为100%,45度刀切削端面转速为800转,进给速度为f0.1。
对图纸上一些未知点进行数学计算,本张图纸的未知点,可用勾股定理算出未知点。
选用的材料是45号圆钢,可以用YT15的硬质合金刀具对零件进行加工。
工件(1)加工工艺为:
打开电源,机床通电。
开机回零,编辑所要加工的程序,预热机床。
下料:锯床下料尺寸Φ40×Φ80
夹具三爪自动定心卡盘夹持45号圆钢Φ45的直径,伸出长度为50mm。
45端面车刀切削端面,保证基准面。
中心转打中心孔,打中心孔时转速为1000转。
直径Φ20的麻花钻打底孔,深度为25mm
用93度硬质合金内孔镗刀粗镗孔Φ32深10mm
用93度硬质合金外圆车刀粗车一端外圆Φ38±0.03至尺寸Φ39长6mm,车Φ36±0.01外圆及端面至尺寸Φ37长35mm。
调头夹外圆Φ37,粗车SΦ34外圆为Φ35长35mm.
检验各档尺寸
夹外圆Φ35,用93度硬质合金外圆车刀精车Φ36±0.01 Φ30±0.03各部外圆至尺寸. 用93度硬质合金内孔镗刀精镗孔Φ33 深10 ,Φ29至深度尺寸25±0.04.
调头用夹套夹外圆Φ36±0.01,车端面至总长75±0.05,车M24×2至尺寸Φ25长24,等待工件冷却后车Φ38±0.03,车SΦ34 ,M24×2, Φ18±0.03各部至尺寸.
使用45端面车刀进行倒角,锐角倒钝.
使用加工所需量具对加工精度进行测量,保证所加工出的尺寸精度符合零件图样的技术要求,确保准确无误。
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