GANGDA synchronous belt wheel machining precision upgrade

1.同步带轮加工精度

1 synchronous belt wheel machining accuracy

同步带轮制造工艺的发展很大程度上表现在精度等级与生产效率的提高.自七十年代以来各种同步带轮的制造精度，普遍提高一级左右.有的甚至2～3级.一般低速同步带轮精度由过去的8～9级提高到7～8级。机床同步带轮由6～8级提高到4～6级.轧机同步带轮由7～8级提高到5～6级。对于模数不大的中小规格同步带轮，由于高性能滚齿机的开发，加上刀具材料的改善，滚齿效率有了显著提高。采用多头滚刀，在大进给且条件下，可达到的切削速度为90m/s。如用超硬滚刀加工模数3左右的调质钢同步带轮，切削过度可达200m／s.提高插齿效率，要受到插齿机刀具往复运动机构的限制。最近在开发采用刀具卸载，使用静压轴承，增强刀架与立柱刚性等新结构后，效率有明显提高。新型插齿机的冲程数可达到2000次／分。

Development of synchronous belt wheel manufacturing process greatly in accuracy and efficiency. The manufacturing accuracy since seventy kinds of synchronous belt wheel, a general increase in level. Some even 2 ~ 3. Low speed synchronous belt wheel precision from 8 ~ 9 to 7 ~ 8 grade. Machine synchronous belt wheel is composed of 6 ~ 8 to 4 ~ 6. Mill synchronous belt wheel from 7 ~ 8 to 5 ~ 6 grade. To the modulus is small and medium-sized specifications pulley, due to the development of high performance gear hobbing machine, coupled with the improvement of tool materials, hobbing efficiency has been significantly improved. By adopting multi hob, and conditions in the feed, cutting speed can reach 90m/s. Such as the use of super hard hob modulus quenched and tempered steel 3 synchronous belt wheel, over cutting up to 200m / s. improve gear efficiency, by the gear shaper cutter reciprocating mechanism restriction. Recently the unloading in the development tool, using static pressure bearing structure, enhance the new holder and the column rigidity, the efficiency is obviously improved. The number of stroke model shaper can reach 2000 times per minute.

2.同步带轮材质

2 synchronous belt wheel material

同步带轮用钢的发展趋势；一是含Cr，Ni，Mo的低合金钢；二是硼钢；三是碳氮共渗用钢；四是易切削钢。由于我国缺乏Ni、Cr，常用20CrMnTi渗碳钢或用含硼加稀土钢。重型机械常用18CrMnNiMo渗碳钢或中碳合金钢。机床行业食用40Cr，38CrMoAl等钢以及高速同步带轮用25Cr2MoV钢进行氮化。

Synchronous belt wheel with development trend of steel; a containing Cr, Ni, Mo low alloy steel; two steel; three is the carbonitriding steel; four is the free cutting steel. Due to the lack of commonly used Ni, Cr, 20CrMnTi steel with boron and rare earth steel or. Heavy machinery used 18CrMnNiMo steel or medium carbon alloy steel. Machine tool industry consumption of 40Cr, 38CrMoAl steel and high-speed synchronous belt wheel are nitrided 25Cr2MoV steel.

同步带轮用铝质加工为多，由于轻工业的迅速发展，铝质同步带轮加工不生锈，质轻，如表面硬度不够还可做表面硬质氧化处理，同步带轮表面本色氧化处理也可提高硬度，相对更耐磨，外观更漂亮．

Aluminium processing for many synchronous belt wheel, due to the rapid development of light industry, aluminium pulley processing does not rust, light quality, such as surface hardness is not enough but also can be used for hard surface oxidation treatment, synchronous belt wheel surface color oxidation treatment also can improve the hardness, wear resistance is relatively more, look more beautiful.

3.同步带轮与科技信息化同步

3 synchronous belt wheel and the science and technology information synchronization

人们利用计算机能对各种可能的设计方实进行计算、分析和比较，并通过优选，取得较为理想的结果.例如在分析同步带轮齿面接触区，求啮合线与相对速度夹角中，对弹流润滑计算以及几何参数计算等方面编制了程序。还有，在同步带轮修形计算与同步带轮承载能力计算方面都编有程序.我国已编制了GB3480-83渐开线圆柱同步带轮承载能力计算标准的程序软件,供生产应用.在同步带轮加工方面，可以利用计算机控制整个切齿过程.使制造质量稳定可靠.目前，国内在研究应用微机对弧齿锥同步带轮的切齿调整卡进行计算，可对加工偏差及时调整.使齿面接触达到比较理想的位置，并大大提高了工效。

People use the computer to design a variety of possible side real calculation, analysis and comparison, and the optimized, achieved satisfactory results. For example, in the analysis of synchronous belt tooth surface contact area, and the meshing line with the relative velocity angle, calculation of elastohydrodynamic lubrication and geometric parameter calculation, the program. Also, the calculation is programmed in the modification calculation and synchronous belt wheel bearing capacity of synchronous belt wheel. China has made GB3480-83 the carrying capacity of involute cylindrical synchronous belt wheel standard calculation software, for the application. In the aspect of synchronous belt wheel processing, can use the computer to control the whole cutting process. The manufacturing quality and stability reliable. At present, the domestic research in the application of Microcomputer on spiral bevel synchronous belt wheel teeth cutting adjustment card to calculate, can adjust the deviation in time for processing. The tooth contact reach ideal position, which greatly improves the working efficiency.

此外，根据数控原理，应用微机对环面蜗杆螺旋齿面进行抛物线修形，已经应用于生产。虽然这方面的工作在国内还处于起步阶段，但它对提高同步带轮制造质量和技术水平具有重要意义。

In addition, according to the principle of NC, parabolic modification application of Microcomputer on the torus worm tooth surface, has been applied to production. Although this work is still at the starting stage in China, but it is significance of synchronous belt wheel manufacturing quality and the level of technology to improve.

国际上，同步带轮装置正沿着小型化、高速化、标准化方向发展.非凡同步带轮的应用、同步带轮及同步带装置的发展、低振动、低噪声同步带轮装置的研制是同步带轮设计方面的一些特点.为达到同步带轮装置小型化目的，可以提高现有渐开线同步带轮的承载推力。各国普遍采用硬齿面技术，提高硬度以缩小装置的尺寸；也可应用以圆弧同步带轮为代表的非凡形。英法合作研制的舰载直升飞机主传动系统采用圆弧同步带轮后，使减速器高度大为降低。随着船舶动力由中速柴油机代替的趋势，在大型船上采用大功率行星同步带轮装置确有成效；现在冶金、矿山、水泥一轧机等大型传动装置中，同步带轮以其体积小、同轴性好、效率高的优点而应用愈来愈多。

Internationally, synchronous belt wheel device along the miniaturization, high speed, standardization direction development. Development and application of special synchronous belt, synchronous belt wheel, wheel and the synchronous belt device, low vibration, low noise synchronous belt wheel device is some characteristics of synchronous belt wheel design. In order to achieve synchronous belt wheel device miniaturization purpose, bearing thrust can improve the synchronous belt wheel existing involute. Countries with hardened technology, improve the hardness to reduce the device size; also can be extraordinary shaped by arc belt wheel as the representative of the. The shipboard helicopter main drive system of the cooperation in the development of circular arc synchronous belt wheel, the gear reducer to reduce height. The ship is powered by a diesel engine instead of the trend, in the large ship adopts high-power planetary synchronous belt wheel device is successful; now a large transmission metallurgy, mine, cement mill device, with the advantages of small volume, coaxial, high efficiency and good application more and more synchronous belt wheel.