在铣床上剃珩大中型齿轮的简易工艺装备

在有条件的大型冶金、工程、矿山等机械厂,剃削和珩磨齿轮都是在专用的剃齿机床上进行的。但一些小型矿山、冶金机械修造厂没有专用的剃齿机。为了对齿轮进行剃齿和珩磨,可以在卧式铣床和立式铣床,上增添一套简易的工艺设备,便将立式和卧式铣床改装成剃齿机床。1机床改装方法1.1卧式铣床改装剃齿机在卧式铣床悬壁梁的燕尾上装置一个万能剃齿附件,工作台上安装两个活顶支架,用来支撑工件。万能剃齿头结构见图1。该剃齿头由上下两部分组成,上壳体1上通过燕尾固定在悬梁上,并与机床主轴连接传递动力;下壳体3用带止口的T型槽通过T型螺钉5与上壳…     

在卧式和立式铣床上剃珩齿轮的简易方法

在有条件的大型冶金机械厂,剃削和珩磨齿轮都是在专用的剃齿机床上进行的。但一般冶金机械修造厂没有专用的剃齿机床。为了对齿轮进行剃削和珩磨,可以在卧式铣床(X62、X63、X64或X65)和立式铣床(X52、X53、X54或X55)上增添一套简易的工艺装备,便将卧式和立式铣床改装成剃齿机床。实践证明,它可以代替专用的剃齿机床来剃削齿轮,也可用于珩齿。 用卧铣和立铣改装剃齿机床,工艺装备结构简单,改装容易,剃齿和珩齿使用方便,经济效果好,能剃珩较大直径的齿轮。     

切槽爆破中切槽参数的研究

通过大量的模拟试验研究和理论分析，对切槽爆破中的切槽角、切槽深度、切槽尖端曲率半径以及切槽宽度对切槽爆破效果的影响和了系统的分析研究，从而获得了在不同条件下获得最佳爆破效果的切槽参数。     

大型预焙电解槽槽内衬破损问题的探讨

详细地分析了不同类型的预焙电解槽槽内衬结构对槽内衬破损和寿命的影响,并对造成槽内衬破损的各种因素进行了探讨.     

人字齿轮滚齿最小空刀槽宽的近似计算

在机械行业中,人字齿轮,齿轴广泛应用于载荷较大的齿轮减速箱,其能否进行滚齿,除了考虑机床加工规格,范围外,还取决于齿轮空刀槽的尺寸大小。因为空刀槽尺寸的大小,在滚切过程中,与滚刀直径切齿深度,工件的螺旋角和齿顶圆的曲率半径(齿数)有关,如何确定齿轮、齿轴空刀槽的尺寸和滚齿的可行性,就成为设计及工艺人员关注的问题。     

新钢锰铁高炉槽下电除尘系统设计及运行效果

锰铁高炉槽下使用电除尘器在全国尚属首家。本文简要介绍了新钢3号锰铁高炉槽下电除尘系统的设计特点,并对其运行效果进行了分析。     

铝电解槽节能技术研究与应用

在研究现有电解槽节能技术的基础上,主要进行了三角凸齿型阴极电解槽研发及配套焙烧启动技术研究,该技术能降低槽电压,节能效果明显,还能避免阴极表面存积沉淀及操作对凸台造成破坏。     

拜耳法种分槽溢流产生的原因及改进实践

分析了中铝山西分公司拜耳法种分槽溢流产生的原因,介绍采取的改进措施和取得的效果.     

大型预焙电解槽内衬结构对内衬破损和寿命的影响

文章详细分析了不同类型的槽内衬结构对槽内衬破损和寿命的影响，并对造成槽内衬破损的各种因素进行了分析和探讨。     

铣床可改装成剃齿机：在铣床上剃齿的简易方法

没有专用剃齿机的一般中小型冶金机械修造厂,可以在卧式铣床、立式铣床上增添一套简易的工艺装备,将其改装成剃齿机床,用来对齿轮进行剃削和珩磨。这种方法简单易行,能剃、珩较大直径的齿轮,可一机多用。     

铝合金焊丝的拉拔及刮削工艺研究

为制造高品质铝合金焊丝材料,通过分析单模拉伸条件、拉伸的影响因素、拉伸配模原则、拉伸加工率等对铝合金焊丝拉伸的影响,形成了铝合金焊丝单模拉伸工艺、热处理工艺、多模连拉工艺及机械刮削光亮化工艺.结果表明:当加工率不超过27%、退火温度为410℃±10℃/保温1.5小时,可实现铝合金焊丝单模拉伸的顺利进行;两道模具之间的加...     

A comparative study of the surgical treatment of axillary osmidrosis by instrument, manual, and combined subcutaneous shaving procedures

Between 1986 and 1996, 128 patients underwent surgery for axillary osmidrosis via en bloc removal of subcutaneous cellular tissue. The patients were followed for 6 months to 7 years (average follow-up, 25 months). The authors propose three categories in which they classified shaving procedures: instrumental shavings (N = 84), manual shavings (N = 96), and combined shaving procedures (N = 76). A modified Inaba's shaver was used in instrument shavings. Combined shaving is mixture of instrument and conventional manual shaving. All patients were asked to complete a questionnaire postoperatively. This follow-up demonstrated that 92.9% of patients who underwent instrument shaving, 95.8% of patients who underwent manual shaving, and 97.4% of patients who underwent combined shaving experienced no odor or occasional, very mild axillary odor postoperatively. Postoperative scar formation was either invisible or excellent in 92.9% of instrument shavings, and 92.1% of patients who underwent the combined procedure reported either a hairless axilla or a marked decrease of axillary hair. The total satisfaction rate in the combined procedure was 94.7%, which is a better result than the instrument (92.9%) and the manual (91.7%) shaving procedures. The wound complication rate per patient with the combined procedure was 13.2%. There was no scar contracture or limitation in arm abduction. The combined subcutaneous shaving procedure using the modified Inaba's shaver has the advantages of rapid and accurate shaving, low incidence of hematoma formation, enhanced wound healing, and easy postoperative care. Therefore, en bloc resection of subcutaneous cellular tissue by combined shaving is a viable option for treatment of axillary osmidrosis.     

环式破碎机主要参数的优化设计

提出了环式破碎机的设计原则,建立了环式破碎机主要参数的优化设计模型,采用复合型法寻优,得到了环式破碎机主要参数的优化结果。     

轧机主传动直流电动机通风冷却系统的设计与应用

通过实例简述了扎机主传动直流电动机通风冷却系统的风机选择原则,方法及其风机房,风机基础和通风管略的设计与应用。     

谈LPG空混气

液化石油混空气可作为城市管道的独立气源或天然气气源的调峰，事故气源，LPG空混气应用广泛，技术成熟可靠，运行安全，经济合理，可与天然气混供。     

PC钢棒裂纹分析

30MnS i钢线材在搓制螺纹、并经过热处理成为PC钢棒后,当其在静置、运输或使用中会发生开裂、断裂。本文跟踪出厂的PC钢棒从母材到成品生产过程,发现裂纹产生的根源是轧制中出现的、表面刮伤等缺陷,并针对性的提出了改进办法。     

Incorporation of the acetylcholine receptor dimer from Torpedo californica in a peptide supported lipid membrane investigated by surface plasmon and fluorescence spectroscopy

The objective of this study was to examine the effect of a bipolar ablation probe on experimentally roughened articular cartilage and compare it with the traditional mechanical shaving technique using the knee joint of sheep. Twenty-eight skeletally mature ewes were divided randomly into two groups: one group was treated with a rotating shaving device and another group was treated using the bipolar ablation probe (Bipolar Arthroscopic Probe; Electroscope, Inc, Boulder, CO). Animals were killed at 0, 6, 12, and 24 weeks, and histological sections of the experimental limbs were compared with sections of the opposite limb using a modified Mankin scale. The following variables were used to determine scores: surface (0-6), cells (0-4), hypocellularity (0-3), matrix staining (transitional zone [0-4], radiate zone [0-4], and focal empty lacunae or hypereosinophilic cells (0-3). Differences in scores for all response variables were calculated as treated limb minus sham limb. Response variables were formed: score >0 recoded as 1 (favorable response treated better than sham), score of 0 recoded as 2 (neutral response no differences), and score <0 recoded as 3 (unfavorable response treated worse than sham). Bipolar ablative probe-treated limbs had 14.29% favorable responses and 35.71% favorable or neutral responses, whereas shave-treated limbs had 0% favorable and only 7.14% favorable or neutral responses. For all variables, bipolar ablative probe-treated limbs had more favorable responses. The less severe histological change in the bipolar ablative probe-treated joints compared with the shave-treated joints suggests that bipolar ablation of articular cartilage may be a better treatment for chondromalacia than the usual shaving methods of debridement. Further, there were no pathological changes in the subchondral bone.     

回转圆筒干燥器主要技术参数的确定

结合设计实例,介绍了回转圆筒干燥器主要技术参数的确定,通过物料平衡计算和热平衡的计算,实现了工艺技术要求;设备运行良好,各项参数实测指标均达到或超过设计要求。     

矿山测量图库管理系统设计

根据矿山测量中不同类型图件的特点,将其分成三类,并采用不同的方式进行管理。按标准分幅的大比例尺地形图,将图名、图号与图幅左下角坐标挂钩,用VC++语言编制专门的管理程序进行管理,不需要建立另外的数据库;对于任意分幅(包括倾斜分幅)的井巷平面图,井巷立体图等,采用数据库的管理方式;对各类建筑物或构筑物的设计施工图等,则采用目录树的方式进行管理。     

反击式破碎机的主传动参数设计计算

反击式破碎机具有许多独特的优点,随着反击式破碎机设计的不断改进,各国都在大力生产和应用推广.其广泛应用于水泥、建筑材料、煤炭、化工和选矿等工业部门.本文根据用户提供的相关参数信息,计算反击式破碎机主传动参数,确保产品设计合理、准确,满足用户对产品的功能要求.