Soldering and cementation of hard-alloy metal cutting tool

1986 ◽  
Vol 22 (9) ◽  
pp. 421-423
Author(s):  
V. V. Du ◽  
M. L. Polyakova ◽  
V. I. Grebenev ◽  
V. P. Zhludov ◽  
V. A. Groshev ◽  
...  
2017 ◽  
Vol 37 (2) ◽  
pp. 148-149
Author(s):  
D. S. Rechenko ◽  
A. Yu. Popov ◽  
D. Yu. Belan ◽  
A. A. Kuznetsov

2014 ◽  
Vol 682 ◽  
pp. 510-514 ◽  
Author(s):  
R.S. Chuykov ◽  
A.A. Mokhovikov ◽  
S.S. Chuykov

Results of research of types of the destruction caused by existence of internal tension in a tool firm alloy at production of the replaceable many-sided plates (RMSP) which can be removed by preliminary heating of cutting plates prior to cutting process are given in work. The new technical solution on realization of a method of preliminary heating of SMP is developed for removal of internal tension in the tool firm alloys (TFA), and also the special design of the metal-cutting tool is developed for increase of operability of hard-alloy SMP with preliminary heating.


Author(s):  
K. V. Diadiun

Providing an increase in the working capacity of a metal-cutting tool, it is possible to significantly increase the productivity of mechanized labor, thereby reducing the cost of purchasing a new tool and saving on other accompanying technological components. During the operation of the cutting tool, the main load is transferred to its working part, this, as a rule, leads to partial wear or complete destruction of the planes and cutting edges. There are a number of technologies for processing working surfaces, which provides them with additional strengthening, the most effective of which is the method of applying special coatings to the surface of the cutting tool. Taking into account the specifics of the processes of formation of coatings, they can be divided into three main groups [1]. The first group includes methods in which the formation of coatings is carried out mainly due to diffusion reactions between saturating elements and structures of the instrumental material. The second group includes methods of forming coatings by a complex mechanism. The third group includes methods of forming coatings due to chemical and plasma-chemical reactions of particle flux simultaneously in volumes of space immediately adjacent to the saturable surfaces of the instrumental base. One such technology is the CIB (condensation and ion bombardment) method, which is a physical deposition of coatings. The most characteristic feature of coatings produced by this method is the absence of a transition zone between the coating and the tool material. This makes it possible to obtain a complex of properties on the working surfaces of the tool without deteriorating its original properties. The article is devoted to the issues of increasing the efficiency of ion-plasma technologies through the development and implementation of an automated system for analyzing and controlling the mass balance of reagent gases under conditions of several gases supply. Thus, the improvement of the technology of coating the working surfaces of the cutting tool, namely, the effective control of the process of applying ion-plasma coatings with the introduction of an automated system for analyzing and controlling the mass balance of reagent gases under conditions of supplying several gases is an urgent task.


2018 ◽  
Vol 224 ◽  
pp. 01066
Author(s):  
Anton Seleznev ◽  
Anton Smirnov ◽  
Pavel Peretyagin

The work represents a new approach of preliminary surface treatment of replaceable polyhedral cutting ceramics inserts for significant increase of adhesion strength with deposited wear-resistant nitride ceramics. By this method the hydrojet treatment was used to repair surface defects occurring during manufacturing process of any required geometry of cutting inserts.


2019 ◽  
Vol 298 ◽  
pp. 00064
Author(s):  
Petr Nikishechkin ◽  
Nikita Grigoriev ◽  
Nadezhda Chervonnova

The basic aspects of preparing a cutting tool for applying wear-resistant coatings to it, in particular, the use of brush technology to round its cutting edges, are investigated. A structural model for constructing a specialized brush machine control system has been developed and the basic aspects of its development have been determined.


1973 ◽  
Vol 15 (3) ◽  
pp. 200-209 ◽  
Author(s):  
P. F. Thomason

An analysis of published experimental and theoretical slip-line field results for the metal cutting process suggests that, when the tool and workpiece are of high elastic modulus, a reasonable first approximation to the rake-face loading will consist of uniformly distributed normal and tangential stresses over the contact length. An indication of the form of the stress distribution at the tip of a cutting tool is therefore obtained from an isothermal–elastic solution for a two-dimensional infinite wedge, loaded antisymmetrically by uniform normal and tangential stresses adjacent to the apex. Only a preliminary assessment of the results is made, in relation to cutting tool wear and fracture problems, since a more detailed assessment will await a complete thermoelastic solution to the problem.


1974 ◽  
Vol 16 (5) ◽  
pp. 322-330
Author(s):  
P. F. Thomason

The transient thermal stresses in an insulated quarter-plane, subject to an instantaneous heat source on a segment of the surface, are determined with the aid of the Green's function for a two-dimensional infinite space. Numerical results for the transient thermal stresses at the surfaces of the quarter-plane are superimposed on previous isothermal results for cutting-load stresses in a π/2 wedge, to provide a model for a metal-cutting tool in the transient stages of a cutting process. The results are related to the problem of the thermal-cracking of cutting tools, and mechanisms of crack nucleation and propagation are proposed for both ceramic and cemented-carbide tools.


2014 ◽  
Vol 682 ◽  
pp. 491-494 ◽  
Author(s):  
Vladislav Bibik ◽  
Elena Petrova

The author considers methods of forecasting metal-cutting tool life based on characteristics of cutting tool material. These characteristics depend on differences in numerical values of physical and chemical properties of tool material due to changes in its composition, structure, and production process variables. The described methods allow obtaining the information necessary for forecasting the tool life beyond the process of cutting, for example at the stage of cutting tool manufacturing. The author suggests using the method of registration of thermo-physical properties of the tool material as a promising forecasting technique.


2019 ◽  
Vol 2019 (9) ◽  
pp. 36-41
Author(s):  
Борис Мокрицкий ◽  
Boris Mokritskiy ◽  
Татьяна Усова ◽  
Tat'yana Usova ◽  
Ольга Шакирова ◽  
...  

It is possible to assume physical properties or stress-strain characteristics of material as a basis of diagnostics of a machine tool system state on the basis of which to forecast a level of engineering process updating for product blank machining and to optimize tool parameters and other equipment components ensuring efficient machining processes economically and technically. The purpose of the work: according to the measurement results of the mass of replaceable hard-alloy cutting plates of a metal-cutting tool to draw a conclusion of their operational capability under those or other operational conditions at a standard engineering enterprise. There are considered standard designs of cutting and chip breaking plates. The mass measurements of more than 250 plates are carried out. The procedure for the plate selection according to quality is developed. The results obtained are tabulated and illustrated. A share ratio of suitable and scrap plates is shown. There are formulated recommendations regarding suitable plates use depending on their quality grade.


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