Current View
Authors:
Мартинов, Георги Мирчев; Патев, Христо Василев; Ангелов, Николай рец.; Martinov, Georgi Mirchev; Patev, Hristo Vasilev
 
Title:
Технологични особености и сравнение на трайността на свредла с валцовани и с шлифовани стружкови канали
 
Other Titles:
Technological peculiarity and comparison on the tool life of drills with rolling and with grinding profile of grooves
 
Date of Issue:
1998
 
Is Part of:
Годишник на ТУ - София, 49, 1998, с. 177-184
 
Publisher:
ТУ-София
 
Identifiers:
0374-342Х [issn]
 
Type:
Article
 
Language:
bul
 
Subject:
металорежещи инструменти – анализ и модели
 
Abstract:
In the present study the degree in tool life dfferense between drils manifactured by means of two technological methods: with rolling and with grinding of whole prop of chip grooves waas founded. The experimental data have shown that the tool life of drils is 1q3 to 1q5 - fold higher than those of grinding ones. These results are in 'disagreement with the data in literature. The above tnentioned discrepancy gave us a ground to study the geometries and mechanicals characteristics of cross section of the two kind of drily. The lower tool life of drils with grinding chip grooves may by due to descreased stability and strenght of their working part and of increased friction of leading bands in driled holes. This is result of considerable deflection in dril design parameters towards standart ones. There are some additional possi-bilities to increase stability and strenght of tested drils having grinding chip grooves by means of increasing of cross section and increasing of feather diameter to 0,95D, of cor diameter to 0,2D and feather width to 0,65D.
 
Description:
Мартинов, Георги Мирчев и др. Технологични особености и сравнение на трайността на свредла с валцовани и с шлифовани стружкови канали / Георги Мартинов, Христо Патев; Рец. Николай Ангелов. (Машиностроене, транспорт). // Том 49, 1998, с. 177-184 : с формули., табл. Рез. на бълг. и англ. ез.; С библиогр.