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凸轮型面
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  cam profile
    The reason of injection noise occurrence for locomotive diesel is analyzed . For the problem of acceleration discontinuity of concave flank three radius supply cam for 16V240ZJC diesel enging,the computing study of several types of function fit are conducted,the computing program is composed, and the idcal cam profile with continuous acceleration is obtained.
    分析了机车柴油机喷射噪声产生的原因,针对16V240ZJC柴油机采用的凹弧三元弧供油凸轮加速度不连续问题进行了几种函数拟合的计算研究,编制了计算程序,最终获得了比较理想的、其加速度连续的凸轮型面
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    The reasons of malfunction phenomena of DF_(4B) locomotive fuel cam damaging were analysed in detail,and the solving measures were put forward accordingly. By taking these measures,we are achieving good results.
    通过多起DF4B型机车供油凸轮型面发生损伤的故障现象的剖析,找出发生故障的原因,并提出了相应的解决措施,取得了较好的效果。
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  cam profile
A method is presented to determine the location and magnitude of cam profile errors.
      
A recursion formula for the cam profile errors is derived using a finite-difference scheme.
      
The mathematical cam profile must be interpolated at some increment to create the numerical data for CNC machining.
      
Using piecewise polynomials, the complete cam profile can be designed as a combined linear system.
      
The system can be used to generate the cam profile, transmission angle, position, velocity, and acceleration of the follower.
      
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In this paper,an application of an NC system to cam-maching,with Apple Ⅱe as the main unit,is presented,The hardware of the system is simple.The software can be operated conveniently and is suitable for real-time control of processing,complicated calculations,data processing,storage of operating results,and so on.In cooperation with specially-designed circular NC table,it can complete the milling machining of curved surfaces of various edge cams,in usual vertical milling machines,without affecting the functions...

In this paper,an application of an NC system to cam-maching,with Apple Ⅱe as the main unit,is presented,The hardware of the system is simple.The software can be operated conveniently and is suitable for real-time control of processing,complicated calculations,data processing,storage of operating results,and so on.In cooperation with specially-designed circular NC table,it can complete the milling machining of curved surfaces of various edge cams,in usual vertical milling machines,without affecting the functions of the computer and the machine.

本文介绍以 APPLE Ⅱe 微机系统为主体的数控装置在印刷机凸轮加工中的应用情况.这种系统的硬件结构简单,软件功能强,不但可进行加工过程的实时控制,还可以进行复杂的计算、数据处理以及程序运行结果的贮存等.适应性强,操作方便.与自行设计的圆形数控工作台相配合,可在普通立式铣床上完成各种盘形凸轮的型面铣削加工.计算机系统及机床的原有功能不受任何影响.

Insufficient use has been made of the load-bearing capacity of the diesel fuel injection pump cam designed with the conventional method. The results of analysis on the allowable pump room pressure indicate that the allowable pump room pressure on each point of the cam profile is closely related to the acceleration at that point, increasing with the acceleration. Based on this, we propose the design method of selecting the acceleration of the cam profile. The cam designed with this new method, for the same allowable...

Insufficient use has been made of the load-bearing capacity of the diesel fuel injection pump cam designed with the conventional method. The results of analysis on the allowable pump room pressure indicate that the allowable pump room pressure on each point of the cam profile is closely related to the acceleration at that point, increasing with the acceleration. Based on this, we propose the design method of selecting the acceleration of the cam profile. The cam designed with this new method, for the same allowable contact stress,is raised in the pump room pressure by about 11%, shortened in the delivery period by above 12% and improved in the performance of the fuel injection system.

按常规方法设计的柴油机喷油泵凸轮承载能力未能得到充分利用。对泵腔许用压力分析表明,凸轮型面每点上的泵腔许用压力与该点上的加速度密切有关,且随加速度的增加而增加,从而提出了按泵腔压力变化来选取凸轮加速度的设计方法。所设计凸轮,在相同的许用接触应力情况下,可提高泵腔供油压力11%以上,供油时间缩短12%以上,改善了喷油系统性能。

The reason of injection noise occurrence for locomotive diesel is analyzed . For the problem of acceleration discontinuity of concave flank three radius supply cam for 16V240ZJC diesel enging,the computing study of several types of function fit are conducted,the computing program is composed, and the idcal cam profile with continuous acceleration is obtained.

分析了机车柴油机喷射噪声产生的原因,针对16V240ZJC柴油机采用的凹弧三元弧供油凸轮加速度不连续问题进行了几种函数拟合的计算研究,编制了计算程序,最终获得了比较理想的、其加速度连续的凸轮型面

 
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