共查询到18条相似文献,搜索用时 46 毫秒
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圆锥滚子外径加工,通常采用无心贯穿磨削与油石超精加工,这两种加工方式都需要有带螺旋槽的导轮(辊)支承滚子,而滚子的角度就要靠导轮(辊)的滚动面来保证。随着技术标准的不断提高,滚子的角度偏差越来越小,因此,导轮(辊)的修磨技术就显得非常重要。 相似文献
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我厂制造了在内圆磨床上修整砂轮凹凸圆弧面的夹具。夹具结构如下: 一、结构特点如图1所示,固定套内孔与内圆磨头外壳相配,配有固定螺钉。固定套上的轴向长槽24H6,对内孔的对称度为0.02,座体上的导向长键24h6与其相配,并可沿长槽移动。 相似文献
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我公司生产的液力变矩器总成中 ,有关键零件自由轮内圈 (图 1) ,其机加工工艺需要磨削关键尺寸5 4 + 0 .0 35- 0 .0 2 0 mm(工作面 )。由于该零件工序多、加工周期长 ,原有的一台磨床难以保证其生产进度要求。为此 ,图 1公司决定再利用一台闲置的M8612A花键轴磨床磨削该零件工作面。此机床原配有两套砂轮修整器 ,分别修整砂轮外圆和端面 ,但是其外圆修整器只能修砂轮外圆为凹圆弧面 ,而自由轮内圈工作面为平面 ,无法直接使用。因此 ,在参考原苏制M34 5 1B等同类磨床基础上 ,我们自行设计了一套砂轮 (外圆 )修整器。其结构简图如图 2。… 相似文献
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M250磨床砂轮双曲线修整器能够保证圆柱滚子轴承外圈滚道在终加工后的滚道凸度的技术要求。该修整器结构简单,操作方便。 相似文献
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A degree of sharpness in wheel grains affects the surface roughness and dimensional accuracy in the grinding process. If a
wheel with dull grains is used, the grinding force is increased and the surface roughness is deteriorated. In ovder to produce
a precision component economically, the magnitude of the wear amount in the grinding wheel has to be limited. In this study,
experimental evaluation of a wheel life varying with the grinding ratio and static grinding force was conducted. The grinding
ratio and grinding force were measured to seek the grinding performance of the WA wheel. The relationship between the grinding
ratio and static grinding force was presented. 相似文献
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Hyeong Jun Kim Sung Soo Ryu Seongwon Kim Hyeong Tae Kim 《International Journal of Precision Engineering and Manufacturing》2009,10(3):13-17
In this study, three ZnO-B2O3-SiO2 frit compositions with low softening point were investigated in order to lower the firing
temperature of cBN-based vitrified bonded wheel. It was tried to develop a new composition of vitrified bond with lower firing
temperature and compatible mechanical properties compared with conventional bond by evaluating the mechanical properties of
each frit composition. Suggested bonds have softening points of 500°C to 520°C and bending strengths of 60 to 90% compared
to the conventional bond. The maintenance of bending strength of bond composition even with less network former is attributed
to the growth of Gahnite, which has submicron size and relatively large thermal expansion coefficient. On the other side,
Willemite (ZnO·SiO2) with large crystalline size and low thermal expansion resulted in the deterioration of bending strength.
The Rockwell hardness used as common measure of bonding of grinding wheel showed no statistically significant difference among
frit compositions in the results. 相似文献
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在对叶片进行数控铣削和砂带抛光磨削的研究基础上,提出了一种叶片数控砂带复合磨削加工的方法.该方法采用了一种刚柔组合的砂带磨削接触轮,兼有切削和抛光的功效.它使叶片的切削加工和抛光加工合二为一,不仅提高了加工效率,也大大降低了生产成本. 相似文献
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从分析现有大型砂轮机构装卸实际情况入手,简单介绍了电主轴的结构,重点论述了电主轴砂轮机构自动更换砂轮的实施过程. 相似文献
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SK7450×9000数控丝杠磨床主要用于超长精密滚珠丝杠外圆和滚道的磨削,它从工艺装备上解决了国内外7m以上滚珠丝杠精磨外圆和滚道时需二次装夹和对接磨削的问题。文章介绍了该机床的结构特点和设计思路,对涉及的多项关键技术如:多功能设计、整机热平衡技术、滚柱导轨和阻尼滑块的应用技术和新型数控金刚滚轮砂轮修整装置设计等作了进一步的论述。指出了数控超长滚珠丝杠磨床的发展方向。 相似文献