共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
为在导电加热切削中获得最佳加工表面质量,对加热电流与切削用量的关系进行了试验研究,并对最佳加热电流的概念进行了分析讨论。 相似文献
3.
4.
在导电加热切削过程中,如何保证以最佳的加热温度进行切削是提高导电加热切削效果的关键问题.本文从刀具耐用度、加工表面粗糙度等方面研究了导电加热切削的最佳加热电流,以高频IGBT逆变开关电源进行试验,设计了导电加热切削加热电流控制系统,并进行了温度控制试验。 相似文献
5.
在导电加热切削过程中,如何保证以最佳的加热温度进行切削是提高导电加热切削效果的关键问题。本文从刀具耐用度,加工表面粗糙度等方面研究了导电加热切削的最佳加热电流,以高频IGBT逆变开关电源进行试验,设计了导电加热切削加热电流控制系统,并进行了温度控制试验。 相似文献
6.
导电加热切削时刀具的热电磨损 总被引:1,自引:1,他引:0
导电加热切削时,由于强烈的电热效应,刀具磨损形态与传统切削加工方法有所不同。本文研究了导电加热切削的电热特性和电物理现象,分析了导电加热切削时刀具的热电磨损及其机理。 相似文献
7.
导电加热切削是在切削过程中,对工件和刀具导入电流的一种加热切削方法。它与普通切削方法相比,具有许多突出的优点,如提高刀具耐用度、减小切削力、改善加工表面粗糙度等等。本文试图通过实验对导电加热切削改善加工表面租糙度方面,进行一些研究和分析。 一、导电加热切削方法的原理 导电加热切削方法的研究是在CM6140型车床上进行的,采用单相整流滤波直流电源。图1为导电加热切削原理示意图。 相似文献
8.
9.
10.
本文根据传统导电加热切削生产效率低,且易烧蚀刀具等问题,提出通过断屑器导电块引入电流进行电加热切削。理论分析及实验结果表明,对于切屑里带状的难加工材料,断屑器导电加热切削能够克服传统电加热切削存在的问题,是一种有效的新加工方法。 相似文献
11.
12.
针对目前市场对工业设计人才的需求,本文论述了我校在工业设计教育方面的改革措施,着重介绍了我校工业设计教育在软件和硬件方面所进行的一系列的改革。 相似文献
13.
《Mechanism and Machine Theory》1991,26(7):697-709
A method of determining polyhedrons of positioning accuracy of mechanical manipulators is developed. Practical significance of the method is illustrated by numerical examples. Polyhedrons of positioning accuracy for a manipulator of 6-R type are calculated for several positions. 相似文献
14.
15.
16.
A new method of decomposition of the interval of the values of random variables based on results of optimization of the nonparametric estimate of the probability density of the Rosenblatt-Parzen type is proposed. Its application in the problem of testing the hypothesis of identity of the distribution laws of two sequences of one-dimensional random variables is considered. 相似文献
17.
依据JJG880-2006浊度计检定规程,介绍了浊度计示值误差测量结果不确定度的评定方法,对配制标准溶液所使用的玻璃量器所引入的不确定度分量进行了分析和评定。 相似文献
18.
In a recent paper, the Ritz method with simple algebraic polynomials as trial functions was used to obtain an eigenvalue equation for the free vibration of a class of homogeneous solids with cavities. The method presented is here extended to the study of a class of non-homogeneous solids, in which each solid is composed of a number of isotropic layers with different material properties. The Cartesian coordinate system is used to describe the geometry of the solid which is modelled by means of a segment bounded by the yz, zx and xy orthogonal coordinate planes and by two curved surfaces which are defined by fairly general polynomial expressions in the coordinates x, y and z. The surface representing the interface between two material layers in the solid is also described by a polynomial expression in the coordinates x, y and z. In order to demonstrate the accuracy of the approach, natural frequencies are given for both a two- and three-layered spherical shell and for a homogeneous hollow cylinder, as computed using the present approach, and are compared with those obtained using an exact solution. Results are then given for a number of two- and three-layered cylinders and, to demonstrate the versatility of the approach, natural frequencies are given for a five-layered cantilevered beam with a central circular hole as well as for a number of composite solids of more general shape. 相似文献
19.
20.
造船门式起重机起升机构减速器出现高速轴断轴的情况较为少见,分析事故原因有利于起重机的安全使用。文中以某造船厂一台造船门式起重机发生的减速器断轴事故为例,依据其设计图纸和实际受力情况,结合轴的力学、断口形貌和材质等方面进行分析,研究断轴发生的原因。该方法可以有效判断该类起重机事故原因,可为其它类型起重机事故分析提供借鉴。 相似文献