the analysis of design parameters of thread milling cutters
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Abstract
Now the mechanical engineering industry produces a great variety of part mix having a male and female thread. In this regard a relevant task is to choose the most effective way of threading. Introduction of multi-coordinate CNC machines considerably extended the use of thread mills, instead of taps, roll burnishers, dies and thread turning tools.
The article reviews manufacturer’s production programs of thread mills (Carmex, Emuge, Jel, Sandvik, Vargus) to show that, presently, there is a significant diversity of thread mill designs for processing. The analysis allowed to reveal the main nomenclature and standard sizes of thread mills, including combined tools on their base, as well as to reveal classification signs and to develop classification of thread mills. Classification comprises also combined tools based on design of thread mill, which allow us to reduce the nomenclature of the tools used in threading.
The paper considers working schemes of the main types of thread mills and areas of their rational application.
To analyse design data of thread mills two types of tools have been selected, namely the integral trailer edge thread mills with the spiral chip flutes and drill thread mills made from hard alloy. The analysis of design data was made in the closed "system of the tool", i.e. in advance assuming that there is a connection between diameter of the tapping part of the tool and diameter of the cut thread. The parameter analysis of the chosen designs allowed us to develop the sketches of tools with the specified parameters to be calculated.
The paper presents graphic dependences of the total length, length of a working part, diameter of a tail part and number of tool teeth on the diameter of the working part of the tool. Approximation of the specified parameters is carried out and mathematical dependences, which can be further used to calculate and choose the starting values of design data in designing the abovementioned constructions of thread mills.
| Reference Key |
malkov2015naukathe
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|---|---|
| Authors | ;O. V. Malkov;M. Yu. Stepanova |
| Journal | BMJ open |
| Year | 2015 |
| DOI |
10.7463/0715.0779372
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| URL | |
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