搜狗做题网高手们帮帮忙（模具英语）
来源：学生作业帮 编辑：搜狗做题网作业帮 分类：英语作业 时间：2024/08/09 17:45:44
高手们帮帮忙（模具英语）
up milling
up milling is the condition when the work is fed against the direction of the rotating milling cutter.the chip is very where the tooth first contacts the work and increases in thickness to a maximum where the tooth breaks out of the work.the initial tooth contact usually occurs in clean metal and ends by lifting or peeling off the rough surface scale.because of this effect,this is the preferred method for machining sand castings,forgings,or metals thae have a rough or hard abrasive surface scale.workpieces must be rigidly held to offset the tendency of the cuttiing foorces to lift or pull the work out of the vise or fixture.
down milling
down milling differs from up milling in that the work is fed in the same direction as the rotating cutter.the cutter tooth starts into the work with a maximun cut thickness and ends with a thin chip,resulting in less cutter wear.the tendency of the cutter is to hold the work down and,in fact,to pull the workpiece under.down milling must be accomplished only in machines that have been specifically designed for this method of cutting.machines that are made with backlash in the leadscrew or feeding mechanism are unsuitable,since any looseness will allow the cutter to draw the workpiece ahead and take bites that are too large.down milling usually produces a better surface finish on harder steels than does up miling.chips are disposed of more readily and are less likely to be carried along by the teeth.it is the method that is usually selected for milling operations on slender and intricate parts.fixture design is simplified.less power is required.increased cutting speeds and feeds are practical.
这里面打错或漏点的都改好了。
the chip is very thin where the tooth first contacts the work and increases in thickness to a maximum where the tooth breaks out of the work.the initial tooth contact usually occurs in clean metal and ends by lifting or peeling off the rough surface scale.because of this effect,this is the preferred method for machining sand castings,forgings,or metals thae have a rough or hard abrasive surface scale.workpieces must be rigidly held to offset the tendency of the cutting forces to lift or pull the work out of the vise or fixture.
down milling
down milling differs from up milling in that the work is fed in the same direction as the rotating cutter.the cutter tooth starts into the work with a maximun cut thickness and ends with a thin chip,resulting in less cutter wear.the tendency of the cutter is to hold the work down and,in fact,to pull the workpiece under the cutter.
up milling
up milling is the condition when the work is fed against the direction of the rotating milling cutter.the chip is very where the tooth first contacts the work and increases in thickness to a maximum where the tooth breaks out of the work.the initial tooth contact usually occurs in clean metal and ends by lifting or peeling off the rough surface scale.because of this effect,this is the preferred method for machining sand castings,forgings,or metals thae have a rough or hard abrasive surface scale.workpieces must be rigidly held to offset the tendency of the cuttiing foorces to lift or pull the work out of the vise or fixture.
down milling
down milling differs from up milling in that the work is fed in the same direction as the rotating cutter.the cutter tooth starts into the work with a maximun cut thickness and ends with a thin chip,resulting in less cutter wear.the tendency of the cutter is to hold the work down and,in fact,to pull the workpiece under.down milling must be accomplished only in machines that have been specifically designed for this method of cutting.machines that are made with backlash in the leadscrew or feeding mechanism are unsuitable,since any looseness will allow the cutter to draw the workpiece ahead and take bites that are too large.down milling usually produces a better surface finish on harder steels than does up miling.chips are disposed of more readily and are less likely to be carried along by the teeth.it is the method that is usually selected for milling operations on slender and intricate parts.fixture design is simplified.less power is required.increased cutting speeds and feeds are practical.
这里面打错或漏点的都改好了。
the chip is very thin where the tooth first contacts the work and increases in thickness to a maximum where the tooth breaks out of the work.the initial tooth contact usually occurs in clean metal and ends by lifting or peeling off the rough surface scale.because of this effect,this is the preferred method for machining sand castings,forgings,or metals thae have a rough or hard abrasive surface scale.workpieces must be rigidly held to offset the tendency of the cutting forces to lift or pull the work out of the vise or fixture.
down milling
down milling differs from up milling in that the work is fed in the same direction as the rotating cutter.the cutter tooth starts into the work with a maximun cut thickness and ends with a thin chip,resulting in less cutter wear.the tendency of the cutter is to hold the work down and,in fact,to pull the workpiece under the cutter.
逆铣
逆铣是工件进给时处于逆着旋转的铣刀方向的状态.铣齿首先接触工件的地方,切屑非常细小,而在铣齿脱离工件的地方（铣削）厚度增加到最大值.铣齿的初始接触通常发生在将粗糙的表面结垢去除或剥除后干净的金属和末端.因为这个原因,所以这是加工具有粗糙或硬质磨擦性表面结垢的翻砂铸件、锻件、或金属的优选方法. 工件必须被刚性保持,以补偿切削力将工件提升或拉出钳夹或夹具的倾向.
顺铣
顺铣和逆铣的不同在于工件是以与旋转的铣刀相同的方向进给的.铣齿以一个最大的铣削厚度开始进入工件,而以微细的切屑结束,只产生较小的铣刀磨损.铣刀的倾向是将工件向下压,而事实上,是在铣刀下拉工件.顺铣只有在专门设计用于这种方法的铣床上才能完成.那些在丝杆或进给机构中带有余隙的铣床是不适用的,因为任何松弛度都会让铣刀将工件向前拉,并产生太大的咬啮.顺铣通常能在较硬的钢上产生比逆铣较好的表面光洁度.切屑更容易处置,且不大可能被铣齿带在一起.它是一种通常选来对纤细和复杂零件进行铣削加工的方法.夹具设计得到简化.需要的功率较小.铣削速度提高,给刀量也比较实用.
逆铣是工件进给时处于逆着旋转的铣刀方向的状态.铣齿首先接触工件的地方,切屑非常细小,而在铣齿脱离工件的地方（铣削）厚度增加到最大值.铣齿的初始接触通常发生在将粗糙的表面结垢去除或剥除后干净的金属和末端.因为这个原因,所以这是加工具有粗糙或硬质磨擦性表面结垢的翻砂铸件、锻件、或金属的优选方法. 工件必须被刚性保持,以补偿切削力将工件提升或拉出钳夹或夹具的倾向.
顺铣
顺铣和逆铣的不同在于工件是以与旋转的铣刀相同的方向进给的.铣齿以一个最大的铣削厚度开始进入工件,而以微细的切屑结束,只产生较小的铣刀磨损.铣刀的倾向是将工件向下压,而事实上,是在铣刀下拉工件.顺铣只有在专门设计用于这种方法的铣床上才能完成.那些在丝杆或进给机构中带有余隙的铣床是不适用的,因为任何松弛度都会让铣刀将工件向前拉,并产生太大的咬啮.顺铣通常能在较硬的钢上产生比逆铣较好的表面光洁度.切屑更容易处置,且不大可能被铣齿带在一起.它是一种通常选来对纤细和复杂零件进行铣削加工的方法.夹具设计得到简化.需要的功率较小.铣削速度提高,给刀量也比较实用.