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蜗杆砂轮磨削是面齿轮的精加工工艺,蜗杆砂轮修整精度直接影响面齿轮磨削精度。本文分析了修整工艺误差对磨削齿面误差的影响规律,并提出了一种面齿轮蜗杆砂轮的成形修整工艺误差建模及补偿方法。首先,建立面齿轮蜗杆砂轮的数学模型,分析面齿轮蜗杆砂轮的成形修整原理,提出利用圆柱齿轮磨齿机的多轴耦合联动实现面齿轮蜗杆砂轮的成形修整。其次,将修整工艺误差分为轴向位置和径向位置误差,分析轴向位置和径向位置误差对磨削齿面误差的影响规律,提出成形修整工艺误差的补偿方法。最后,进行蜗杆砂轮补偿修整、面齿轮磨削加工及测量实验,实验表明:左齿面齿形误差由补偿前51.9μm到补偿后7.9μm,右齿面齿形误差由补偿前35.3μm到补偿后17.6μm,验证了误差补偿方法的有效性。 相似文献
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利用专业三维软件CATIA V5的宏程序功能,基于共轭齿面包络加工原理,研究了滚刀加工渐开线斜齿轮的计算机虚拟加工问题,完成了斜齿轮的整体虚拟滚齿切削仿真技术。利用CATIA中的命令提取并结合由虚拟加工得到的众多细小曲面来形成齿轮齿面,实现了精确齿轮整体模型的仿真加工方法,并通过与理论齿面比较,齿面精度误差在1μm以下,验证了该方法的正确性,并对可能影响齿面精度的加工因素进行了探讨。本方法为提供齿轮机床的误差形成原理,以及理论齿面和误差齿面的齿轮有限元分析提供了一个虚拟的三维数据研究平台。 相似文献
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针对准确测量正交面齿轮的传动误差,减小测量过程中面齿轮安装误差对测量结果影响的问题,对既有偏置距又有加工误差的正交面齿轮进行了数学建模,并采用了TCA分析方法,研究了偏置距对带有加工误差的正交面齿轮传动误差及接触轨迹的影响规律,确定了最大偏置距范围。对不同偏置距下的面齿轮传动误差进行了测量实验,得到了一系列传动误差实测曲线及面齿轮一齿切向综合偏差。研究结果表明:面齿轮沿轴向上偏对传动误差影响不大;面齿轮沿轴向下偏时,面齿轮一齿切向综合偏差增大8.086μm;齿轮相对于小齿轮左右偏时,对传动误差无明显影响,面齿轮一齿切向综合偏差偏移量在1μm之内;这一结果对面齿轮传动误差测量中如何减小安装误差对测量结果的影响具有指导意义。 相似文献
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测头对准误差对齿轮测量中心ZC蜗杆齿廓偏差测量结果的影响较大,需要建立测头对准误差修正方法。基于ZC1蜗杆齿面方程,建立了蜗杆轴向齿廓测量误差模型,修正得到轴截面上齿廓测量点的轴向坐标,再依据精度标准评定得到蜗杆齿廓偏差,并分析了蜗杆的不同头数、模数和分度圆直径对蜗杆轴向齿廓测量误差的影响规律。在齿轮测量中心上开展了蜗杆轴截面齿廓测量实验,测头对准误差对齿廓形状偏差的影响较小;测头对准误差修正前后齿廓测量总偏差的最大差异由1.2μm降为0.2μm;齿廓形状测量偏差的最大差异由0.5μm降为0.3μm;齿廓倾斜测量偏差的最大差异由2.5μm降为0.4μm。该方法可有效减小齿轮测量中心测头对准误差对蜗杆轴截面齿廓偏差测量的影响。 相似文献
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为了制造出高精度硬齿面斜齿面齿轮和获得抛物线传动误差并改善啮合性能,对采用碟形砂轮加工双向修形的斜齿面齿轮的磨齿方法进行了研究。设计了渐开线失配的碟形砂轮齿面,分析了碟形砂轮磨削斜齿面齿轮的展成原理,根据展成原理和用渐开线失配的碟形砂轮并改变砂轮的运动,推导出双向修形斜齿面齿轮的齿面方程。给出了双向修形斜齿面齿轮的齿面计算和接触分析实例,结果表明:理论齿面的最大齿面误差为5.98×10-4μm,采用碟形砂轮加工双向修形斜齿面齿轮的磨齿方法是可行的,获得了斜齿面齿轮抛物线传动误差,避免了边缘接触并改善了斜齿面齿轮的啮合性能。 相似文献
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为了通过测量齿面拓扑轮廓来获取特征线误差,提出了一种基于正交距离回归齿面的误差计算方法。对该方法涉及的实际齿面与理论齿面匹配算法、拓扑轮廓误差的计算与分解及齿面特征线误差的评定算法进行了研究。首先,通过坐标测量方法获取的齿面拓扑数据,建立包含回归齿面参数的非线性方程。然后,求解非线性方程得到回归齿面参数的最优近似解,从而得到与实际齿面匹配的理论齿面,拓扑测量点相对理论齿面的正交距离即为齿面拓扑误差。最后,基于齿轮误差多自由度理论,对实际齿面进行局部自由度及全局自由度回归,进一步分解出齿面的齿廓误差和螺旋线误差。以一标准圆柱直齿轮的齿面拓扑测量点数据为例进行了误差计算,结果显示:计算的结果与直接进行特征线测量的结果差值小于0.5μm,表明提出的基于正交距离回归齿面进行齿轮误差评定的方法是有效的,可以应用于坐标类仪器检测齿轮误差。 相似文献
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降低齿轮齿距累积偏差的方法 总被引:1,自引:1,他引:1
为了减小齿轮磨削加工中的磨床系统分度误差,提高齿轮加工精度,分析了齿轮磨床分度误差、齿轮安装偏心和齿轮齿距偏差之间的关系,获得了分度误差的计算方法,并计算出了齿轮磨床的分度误差。依据计算得到的分度误差值调整磨床,降低磨床分度误差,减小齿轮齿距累积偏差,提高了齿轮加工精度。以Y7125大平面砂轮磨齿机床为例验证了提出方法的可行性。建立了齿轮安装偏心和齿廓偏差的数学模型,求出了齿轮安装偏心的幅值和相位角,然后由齿轮安装偏心、磨床分度误差和齿轮齿距偏差的关系得到磨床的分度误差值。根据计算得到的分度误差值调整磨床分度盘,使磨床的分度误差从17.7μm减少为3.3μm,被加工齿轮的齿距累积总偏差由46.9μm降低到11.5μm,齿距精度达到三级。验证结果表明,按照这种方法调整磨床可以快速有效地降低磨床的系统分度误差,从而降低齿轮的齿距累积偏差。 相似文献
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杨光 《机械工人(冷加工)》2014,(16)
正我公司一台汉江机床厂产于20世纪70年代的Y7520K螺纹磨床,由于使用年代较长,在对蜗杆进行单齿面磨削加工时经常出现加工误差。经哈量L100齿轮测量中心的检测发现,被磨削齿面检测第一项:一转螺旋线fh的测值为左齿面7.9μm,右齿面为62.8μm,其两齿面均超过GB 10089—1988中4级精度公差7.1μm的国家标准。第二项蜗杆螺旋线fhL的测值为左齿面12.9μm、右齿面62.8μm,其右 相似文献
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Mathematical modeling for finishing tooth surfaces of spiral bevel gears using pulse electrochemical dissolution 总被引:1,自引:1,他引:0
Ning Ma Wenji Xu Xuyue Wang Zefei Wei 《The International Journal of Advanced Manufacturing Technology》2011,54(9-12):979-986
Gears with a complex curve tooth, such as spiral bevel and hypoid gears, lack an ideal technique for the final finishing process. Pulse electrochemical finishing (PECF) is considered a promising method for surface finishing due to its micro-removal characteristics. A PECF system for spiral bevel gear (SBG) is established according to the generation of SBG tooth surfaces. An SBG (module, 12?mm; number of teeth, 38) is selected as the processing test piece, and mathematical models are developed for analyzing the characteristics of PECF. The influence of the experimental variables, including applied voltage, interelectrode gap, and finishing time, on the total removal thickness and surface roughness is discussed. The calculated values are found to be approximately consistent with the experimental values. The other parameters, including the concentration of electrolyte, tool rotational speed, flow rate of electrolyte, and pulse period, are also studied. Results show that the roughness of the SBG tooth surface is reduced from Rz 7.13 to 4.32???m. The precision of the SBG is also improved. 相似文献
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Xiuli Geng Xuening Chu Zaifang Zhang 《The International Journal of Advanced Manufacturing Technology》2012,61(1-4):1-13
Many previous researches on high-speed machining have been conducted to pursue high machining efficiency and accuracy. In the present study, the characteristics of cutting forces, surface roughness, and chip formation obtained in high and ultra high-speed face milling of AISI H13 steel (46–47 HRC) are experimentally investigated. It is found that the ultra high cutting speed of 1,400?m/min can be considered as a critical value, at which relatively low mechanical load, good surface finish, and high machining efficiency are expected to arise at the same time. When the cutting speed adopted is below 1,400?m/min, the contribution order of the cutting parameters for surface roughness Ra is axial depth of cut, cutting speed, and feed rate. As the cutting speed surpasses 1,400?m/min, the order is cutting speed, feed rate, and axial depth of cut. The developing trend of the surface roughness obtained at different cutting speeds can be estimated by means of observing the variation of the chip shape and chip color. It is concluded that when low feed rate, low axial depth of cut, and cutting speed below 1,400?m/min are adopted, surface roughness Ra of the whole machined surface remains below 0.3?μm, while cutting speed above 1,400?m/min should be avoided even if the feed rate and axial depth of cut are low. 相似文献
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Kapil Gupta Neelesh Kumar Jain 《The International Journal of Advanced Manufacturing Technology》2014,72(9-12):1735-1745
This paper reports about investigations on some important aspects of surface integrity of the miniature spur gears manufactured by wire electrical discharge machining (WEDM) process. The investigations included study of variation of form errors (deviations in profile and lead) and surface roughness with discharge energy parameters, i.e., voltage and/or pulse-on time for the miniature gears. The effect of WEDM process on flank surface topography, bearing length parameters, microstructure, and microhardness for the best quality miniature gear were also studied. The manufactured miniature gears were of external spur type having 9.8 mm as outside diameter, 4.9-mm thickness, 0.7 mm as module, 12 teeth, and were made of brass. It was found that combination of low discharge energy parameters resulted in better form accuracy, surface finish, and microstructure ensuring enhanced service life and better functional characteristics of the WEDMed miniature gears. The best quality miniature gear had form errors (i.e., lead and profile deviations) as low as 5.4 μm, very little variation in the actual surface topography from the theoretical one, an average surface roughness of 1 μm, and maximum surface roughness within the entire evaluation length as 6.4 μm, showed consistent surface finish measured by other surface roughness parameters, good bearing area curve, and crack-free gear tooth surface without significant alteration in microhardness. Results of the present work demonstrate the superiority of the WEDM process over the conventional miniature gear manufacturing processes. 相似文献
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介绍了一种钛合金叶片强化抛光原理,该方法将传统的强化与抛光工序合二为一。建立了强化抛光试验装置,对钛合金叶片进行了强化抛光试验。研究了磨块、频率、时间、振幅等对强化抛光的影响。试验表明:强化抛光后,钛合金叶片表面粗糙度从Ra0.35~0.5μm下降到Ra0.1~0.12μm,疲劳强度提高了约50%。 相似文献
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基于铺粉厚度优选出的3个工艺参数组合,分析了工艺参数组合对激光选区熔化技术成形AlSi10Mg合金试样基本性能的影响。3个工艺参数组合成形的试样硬度均高于63HRB,上表面单位面积磨损量均低于1.5×10-5 g/(s·mm2),孔隙率在0.05%以下,抗拉强度高于440 MPa,成形的测试试样尺寸误差均在±0.1 mm以内。试样上表面的表面粗糙度Ra在4 μm以下,侧表面的表面粗糙度Ra在5 μm以下。铺粉厚度30 μm的试样表面质量最优。 相似文献
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提出了采用超精密磨削加工锭杆轴承档的思想,设计了加工锭杆轴承档的超精密磨床,磨削运动系统正常,夹具定位方便,结构紧凑,外型美观。采用先进的立方氮化硼(CBN)磨条(油石),具有硬度高,锋利性好、耐磨等优点。使用情况表明,锭杆轴承档加工表面粗糙度降低为Ra0.01μm,生产效率提高了15倍。 相似文献