共查询到20条相似文献,搜索用时 234 毫秒
1.
陈家芳 《机械工人(冷加工)》1959,(10)
比较新式的车床(如1A62)的走刀箱内,都有车蜗杆螺纹的变速机构。但一般的公制或英制齿轮车床的走刀箱内,是没有这种变速机构的。而只有车每吋牙数和螺距的变速机构。所以操作者遇到在一般齿轮车床上车制蜗杆螺纹时,就感到困难。现在我们介绍一种在一般车床上车蜗杆螺纹的配换齿轮计算方法。计算配换齿轮前,先变换一下走刀箱上的手柄。交换手柄时,可以把铭牌上每吋牙数位置看作蜗杆螺纹径节(D.P.)数的位置;螺距位置看作蜗杆螺纹模数(M)的位置。然后在铭牌上找到需车的蜗杆螺纹的径节或模数 相似文献
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车削螺纹是多次走刀后才完成的,因此螺纹车床除应具备螺纹的成形运动而外,还应具有进刀(切入)运动。此运动在一般的自动或半自动螺纹车床中,大都采用棘爪、棘轮和端面台阶凸轮机构来实现车刀的多次进退动作。但是当被加工工件的螺纹牙高变更则原有的端面台阶凸轮就必须更换;特别是在车削高强度材料的大螺距螺纹(牙高大的 相似文献
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张永权 《机械工人(冷加工)》2005,(6):81-82
数控车床在加工螺纹零件时,由于二次对刀的问题,制约了数控车床在加工螺纹、蜗杆等工件方面的效率,特别是蜗杆加工,因为蜗杆的两侧面需要精加工,这就需要在粗加工后换精车刀对蜗杆进行精加工。如果不能很好地解决对刀问题,将无法实现对蜗杆的精加工,这制约了数控车床在蜗杆加工方面的应用。 相似文献
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1前言管子切断套丝机是机械、建筑等行业常用的机器。目前国内外这种机器的管子切断部分均为手动断续进刀,其缺点是效率低、劳动强度大。本文介绍的平面螺纹、齿轮组合机构进刀装置能实现滚刀连续、均匀自动进刀切断,自动退刀。采用该装置的管子切断、套丝机已在武汉市... 相似文献
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蔡伟南 《机械工人(冷加工)》1989,(9)
在螺纹套丝机的螺纹梳刀进给刀盘的试制中,由于受到设备的限制,我们设置了在立式铣床上加工偏心圆弧凸块的工序,其工件如图1所示。刀盘的材料为灰口铸铁HT 20-40。由于4个圆弧凸块的位置及尺寸精度要求较高,加工时容易出现废品。为此,我们设计制造了铣平面偏心凸块的夹具。该夹具固定在预先装在铣床工作台上的回转盘上,回转盘设有自动进给机构 相似文献
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在C620-1普通车床上车制各种滚刀、蜗杆和丝杠的螺纹时,因工件的齿形深加工量大,往往需要数十次走刀才行。操作者需要进行频繁的进刀和退刀,劳动强度很高,但工作效率并不高,还容易出现废品。为了改善上述劳动条件,我们在该车床上的径向进刀丝杠处设计安装了如图所示的快速进退装置。该装置只需制造五个非标准零件即可实现刀具刀架及溜板系统的快速进退。这种结构也可用于其他车床(需要重新设计安装 相似文献
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郭洪志 《机械工人(冷加工)》2006,(7):69-70
采用数控车床车削螺纹,例如普通三角螺纹,相对卧式车床而言,可成倍提高效率。但对于大螺距梯形螺纹,蜗杆的数控高速车削有一定难度,应合理编程及使用刀具,防止崩刀。 相似文献
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一种高效简易的螺纹套丝机贵州平坝平水机械厂(561104)彭福田1前言本文介绍一种高效简易的螺纹套丝机,该机适于对数量大、精度要求不高的螺纹套丝,如水利、建筑工地上构件连接时大量的螺纹接头套丝,这种套丝机具有生产率高(一分钟可加工一件)、适用范围广(... 相似文献
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王金霞 《机械工人(冷加工)》2007,(6):40-41
蜗杆蜗轮常用于传递两轴交错90°的运动,即直角传动,蜗杆蜗轮适用于减速运动的传递机构中。蜗轮齿形一般在齿轮机床上加工,而蜗杆齿形在车床上用蜗杆车刀进行切削加工。蜗杆车刀与梯形螺纹车刀基本上相同,但是,因一般蜗杆的导程角较大,在刃磨蜗杆车刀 相似文献
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对自动编程系统中的螺纹切削的处理方法进行了研究。分析了数控车床自动编程系统中螺纹加工的几个关键问题:螺纹加工方向、进退刀方式、切削行距、切入方式和多线螺纹处理,给出了螺纹加工处理的算法和后置处理方法。经过实验验证,该方法可行有效。 相似文献
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MODIFICATION OF GEOMETRY AND TECHNOLOGY OF CYLINDRICAL WORMS 总被引:1,自引:0,他引:1
The objective of this research is to develop a new method of grinding process that can efficiently make concave profile of the worm thread smooth. The grinding is carried out using a wheel with curvature profile in the axial plane in the form of an arc of logarithmic spiral. The proposed method will provide maximum line of contact between the tool and the worm with minimum stress concentration at any point. The generating equation of the grinding tool profile and its arrangement with respect to the worm during thread grinding were determined. 相似文献
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The objective of this research is to develop a new method of grinding process that can efficiently make concave profile of the worm thread smooth. The grinding is carried out using a wheel with curvature profile in the axial plane in the form of an arc of logarithmic spiral. The proposed method will provide maximum line of contact between the tool and the worm with minimum stress concentration at any point. The generating equation of the grinding tool profile and its arrangement with respect to the worm during thread grinding were determined. 相似文献
13.
The aim of this work was to improve the accuracy of the concave profile worm thread by using a new generating surface of grinding wheel. To support the geometrical and technological optimization, the current article describes how we produced a smooth and accurately finished tool that will provide maximum line of contact between the tool and the worm with minimum stress concentration at any point. The present study proposed grinding the thread with grinding wheel having a curvature profile in the axial plane in the form of an arc of hyperbola. The generating equation of the tool profile and its arrangement with respect to the worm during grinding were determined. 相似文献
14.
为了实现面齿轮磨齿加工,采用包络原理对面齿轮磨削蜗杆砂轮齿形进行设计,并对蜗杆砂轮的修整方法进行研究.建立了蜗杆砂轮齿面的包络坐标系;给出了蜗杆砂轮产形面方程;推导了蜗杆砂轮齿廓的曲面方程,利用Matlab软件对蜗杆砂轮齿廓进行了仿真,根据面齿轮磨削蜗杆砂轮的齿面生成原理,给出了修整工具的齿廓形状、齿宽限制以及修整工具... 相似文献
15.
ABSTRACT The aim of this work was to improve the accuracy of the concave profile worm thread by using a new generating surface of grinding wheel. To support the geometrical and technological optimization, the current article describes how we produced a smooth and accurately finished tool that will provide maximum line of contact between the tool and the worm with minimum stress concentration at any point. The present study proposed grinding the thread with grinding wheel having a curvature profile in the axial plane in the form of an arc of hyperbola. The generating equation of the tool profile and its arrangement with respect to the worm during grinding were determined. 相似文献
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