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1、2017-2018 学年第二学期机械制造技术基础作业1、切削用量三要素包含哪些？请分别解释它们的定义，并说明如何计算。答：切削用量三要素：切削速度Vc、进给量 f、背吃刀量 ap 切削速度Vc：主运动的速度，大多数切削加工的主运动采用回转运动。进给量f：进给速度Vf是单位时间的进给量，单位是mm/s(mm/min)。进给量是工件或刀具每回转一周时两者沿进给运动方向的相对位移，单位是mm/r。背吃刀量 ap:对于车削和刨削加工来说，背吃刀量 ap 为工件上已加工表面和待加工表面的垂直距离，单位mm。2、刀具前角和主偏角对切削力有何影响？切削力三个分力对工艺系统各有何影响？答：1）刀具前角增大，切
2、削力减小。2）主偏角增大，切深抗力减小，而进给抗力增大。3）主切削力是最大切削力，直接影响机床主电机功率选择、主轴强度和刚度设计以及刀具强度设计。4）进给抗力直接影响机床进给系统的功率、强度和刚度的设计。5）切深抗力是造成让刀和细长工件变形从而引起加工形状和尺精品资料-欢迎下载-欢迎下载 名师归纳-第 1 页，共 21 页 -寸误差的主要原因。3、刀具切削部分材料应具备哪些性能?为什么?答：刀具切削材料应具备的性能：高的硬度和耐磨性；足够的强度和韧度；高的耐热性；良好的工艺性；满足良好的经济性。原因：在切削过程中，刀具直接切除工件上的余量并形成已加工表面。切削加工时，由于摩擦与变形，刀具承受了
3、很大的压力和很高的温度，因此在选择刀具材料时应该要考虑材料的硬度、耐磨性、强度、韧度、耐热性、工艺性及经济性。刀具材料对金属切削的生产率、成本、质量有很大的影响，因此要重视刀具材料的正确选择和合理使用4、切削热是怎样产生？它对切削加工有何影响？答：切削加工过程中，切削功几乎全部转化为热能，将产生大量的热量，将这种产生于切削过程的热量称为切削热。其来源主要有 3 种：（1）切屑变形所产生的热量，是切削热的主要来源。（2）切屑与刀具前刀面之间的摩擦所产生的热量。（3）零件与刀具后刀面之间的摩擦所产生的热量。传入零件的切削热，使零件产生热变形，影响加工精度，特别是加工薄壁零件、细长零件和精密零件时，
4、热变形的影响更大。磨削淬火钢件时，磨削温度过高，往往使零件表面产生烧伤和裂纹，影响零件的耐磨性和使用寿命。传入刀具的切削热，比例虽然不大，但由于刀具的体积小，热容量小，因而温度高，高速切削时切削切削温度可达1000精品资料-欢迎下载-欢迎下载 名师归纳-第 2 页，共 21 页 -文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE
5、6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G
6、3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编
7、码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M
8、3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7
9、D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3
10、L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I
11、3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7度，加速了刀具的磨损。5、试描述积屑瘤现象及成因。积屑瘤对切削过程有哪些影响？答：在切削速度不高而又能形成连续切削，加工一般钢材或其他塑性材料，常在前刀面切削处粘着一块剖面呈三角状的硬块，称为积屑瘤。其硬度很高，为工件材料的23 倍，处于稳定状态时可代替刀尖进行切削。成因：在中低速切削塑性金属材料时,刀屑接触表面由于强烈的挤压和摩擦而成为新鲜表面,两接触表面的金属原子产生强大的吸引力,使少量切屑金属粘结在前刀面上,产生了冷焊,并加工硬化,形成瘤核。瘤核逐渐长大成为积屑瘤，且周期性地
12、成长与脱落。影响：积屑瘤粘结在前刀面上，减少了刀具的磨损；积屑瘤使刀具的实际工作前角大，有利于减小切削力；积屑瘤伸出刀刃之外，使切削厚度增加，降低了工件的加工精度；积屑瘤使工件已加工表面变得较为粗糙。由此可见：积屑瘤对粗加工有利，生产中应加以利用；而对精加工不利，应以避免。6、金属切削过程的实质是什么？哪些指标用来衡量切削层金属的变形程度？由此如何减少切削变形？答：金属切削过程形成过程的实质：是如果忽略了摩擦、温度和应变速度的影响，金属切割过程如同压缩过程，切削层受刀具挤压后也会产生弹性变形、塑性变形、晶格剪切滑移直至破裂，最终完成切削，完成切削过程。切削层金属的变形程度指标：相精品资料-欢迎
13、下载-欢迎下载 名师归纳-第 3 页，共 21 页 -文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3
14、L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I
15、3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE
16、6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G
17、3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编
18、码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M
19、3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7对滑移、变形系数h。切削变形程度主要受到前角、剪切角的影响。如果增大前角和剪切角，使和h 减小，则切削变形减小。只
20、能近视地表示切削变形程度。因为h 主要从塑形压缩方面分析；而主要从剪切变形考虑。所以和h 都只能近似地表示剪切变形程度。7、分别说明切削速度和背吃刀量的改变对切削温度的影响？答：（1）切削速度 v 的影响随着切削速度的提高，切削温度将显著上升。这是因为：切屑沿前刀面流出时，切屑底层与前刀面发生强烈摩擦从而产生大量切削热；由于切削速度很高，在一个很短的时间内切屑底层的切削热来不及向切屑内部传导，而大量积聚在切屑底层，从而使切屑温度显著升高。另外，随着切削速度的提高，单位时间内的金属切除量成正比例地增加，消耗的功增大，切削热也会增大，故使切削温度上升。（2）进给量 f的影响随着进给量的增大，单位时
21、间内的金属切除量增多，切削热增多，使切削温度上升。但切削温度随进给量增大而升高的幅度不如切削速度那么显著。这是因为：单位切削力和单位切削功率随增大而减小，切除单位体积金属产生的热量减少了，同时增大后切屑变厚，切屑的热容量增大，由切屑带走的热量增多，故切削区的温度上升不甚显著。（3）背吃刀量 ap 的影响背吃刀量对切削温度的影响很小。这是因为，增大以后，切削区产生的热量虽增加，但切削刃参加工作的长度增加，散热条件改善，故切削温度升高并不明显。切削温度对刀具磨损和耐用度精品资料-欢迎下载-欢迎下载 名师归纳-第 4 页，共 21 页 -文档编码:CM7M3A10K7D3 HN3L1U10I3S3
22、ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J
23、4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文
24、档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM
25、7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10
26、K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 H
27、N3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U1
28、0I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7影响很大。由以上规律，可知，为有效控制切削温度以提高刀具耐用度，选用大的背吃刀量或进给量,比选用大的切削速度有利。8、说明高速钢刀具在低速、中速产生磨损的原因，硬质合金刀具在中速、高速时产生磨损的原因？答：低速、中速高速钢磨损的原
29、因：磨粒磨损对高速钢作用较明显。在切削过程中有一些比刀具材料硬度更高的碳化物、氧化物、氮化物和积屑瘤碎片等硬颗粒起着磨粒切削的作用，造成磨损，是低速时磨损的主要原因。粘结磨损，由于接触面滑动，在粘结处产生破坏造成的。在低速切削时，温度低，在压力作用的接触点处产生塑性变形；在中速切削时，温度较高，促使材料软化和加速分子间运动，更容易造成粘结。相变磨损：在中速切削时，温度较高，当超过相变温度时，刀具表面金相组织发生变化。中速、高速硬质合金磨损的原因：粘结磨损，在高温作用下钛元素之间的亲和作用，会造成粘结磨损。扩散磨损：在高温作用下，切削接触面间分子活动能量大，合金过元素相互扩散，降低刀具材料力学性
30、能，经摩擦作用，加速刀具磨损。氧化磨损：在温度较高时，硬质合金中WC、Co与空气中的 O2化合成脆、低强度的氧化膜WO2，受到氧化皮、硬化层等摩擦和冲击作用，形成了边界摩损。9、什么叫加工余量？确定加工余量主要考虑哪些因素？答：切削加工中切削速度、进给量和切削深度这三要素的统称。精品资料-欢迎下载-欢迎下载 名师归纳-第 5 页，共 21 页 -文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7
31、文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:C
32、M7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A1
33、0K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3
34、HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U
35、10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3
36、 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3
37、J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W710、工件定位用精基准的选择应遵循哪些原则？答：1、基准重合原则：应尽量选用被加工表面的设计基准作为精基准。2 基准统一原则：应尽可能选择同一组精基准加工工件上尽可能多的加工表面，以保证各加工表面之间的相对位置关系3 互为基准原则：当工件上两个加工表面之间的位置精度要求比较高时，可以采用两个加工表面互为基准反复加工的方法4 自为基准原则：一些表面的精加工工序，要求加工余量小而均匀，常以加工表面自身为精基准。5 便于装
38、夹原则：所选择的精基准，应能保证定位准确、可靠、夹紧机构简单，操作方便。11、试分析下面三图中各定位元件所限制的自由度数。12、什么定位？什么是夹紧？定位与夹紧的区别什么？答：定位是指工件在机床上或夹具中占有准确加工位置的过程。夹紧是指工件定位后用外力将其固定，使其在加工过程中保持定位位置不变的操作。精品资料-欢迎下载-欢迎下载 名师归纳-第 6 页，共 21 页 -文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3
39、ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J
40、4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文
41、档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM
42、7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10
43、K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 H
44、N3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U1
45、0I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W713、加工阶梯轴如下图，试列表制订加工工艺过程（包括定位）。单件小批生产。答：加工工艺过程如下：工序号工序内容设备1 车端面、打顶尖孔、车全部外圆、切槽与倒角车床2 铣键槽、去毛刺铣床3 磨外圆外圆磨床14、试确定在批量生产条件下，下图所示阶梯轴的加工工艺过程。材料为 45 钢,表面硬度要求35-40HRC。请拟定工序，定位粗基准和精基准，工序内容，加工方法。精品资料-欢迎下载-欢迎下载 名师归
46、纳-第 7 页，共 21 页 -文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 Z
47、E6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4
48、G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档
49、编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7
50、M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K7D3 HN3L1U10I3S3 ZE6E3J4G3W7文档编码:CM7M3A10K