THE SCIENTIFIC APPROACH TO CHOOSING AND CALCULATING FITTINGS IN MECHANICAL ENGINEERING
Journal Title: Прогресивні техніка та технології харчових виробництв ресторанного господарства і торгівлі - Year 2017, Vol 1, Issue
Abstract
Experimental and scientific researches of calculation and implementation of various fits in smooth connections in educational and production processes were conducted. The necessity of the use of fits with clearance, transitional and with tension in each individual case was mathematically grounded. Recommendations of accuracy workmanships choosing during engineering calculations in mechanical engineering were analyzed and elaborated. In the first place it is necessary to choose the type of fit (with tension, transition or with clearance) which depends on the functions of a particular assembly and the reciprocal position of parts during their operation. After the type of fit choosing it is necessary to define limiting declinations of clearance values Smin and Smax or tension values Nmin and Nmax and at the same time workmanship accuracies of connecting parts. Design is common method for determining of fits, black belts and production accuracy, it is similar to use of previous years mechanical engineering experience. It should be known: the materials from which the parts are made; types and nature of oils are used during the operation; surfaces roughness, which can be achieved in production process; accuracy of machine tools for parts production; lifetime to repair work; accuracy of finished mechanism work. How are the fits chosen? Various fits for moving and fixed connections are chosen on the base of previous scientific calculations, experimental studies and with taking into account of similar well known connections. The calculations of the choice of moving fits, such as bearings, are done on the base of hydraulic friction theory and based on the defining of the necessary clearance for fluid friction providing. In other cases, the clearances can be calculated in terms of shapes deflection compensation and surfaces position for providing easy assembly of parts.
Authors and Affiliations
Віктор Куценко
Keywords
Related Articles
- EP ID EP185791
- DOI -
- Views 83
- Downloads 0
QUALITY AND CRYORESISTANCE OF FROZEN STRAWBERRIES PRETREATED IN THE SOLUTIONS WITH STRUCTURE-MAINTAINING PROPERTIES
The quality of frozen Dukat strawberries pretreated in the solutions with structure-retentive properties was studied: 1,2 and 3% solution of potato starch and 1 and 2% sugar-pectin solutions. The quality was estimated by...
ІММОБІЛІЗАЦІЯ ПАПАЇНУ НА ГЛЮКАНІ ДРІЖДЖІВ SACCHAROMYCES CEREVISIAE
Доведено доцільність іммобілізації рослинного протеолітичного ферменту папаїну на полісахаридній матриці – β-глюкані дріжджів Saccharomyces cerevisiae. Установлено раціональні умови іммобілізації. Іммобілізований фермент...
SUBSTANTIATION OF THE USE OF EXTRACTS FROM VEGETABLE RAW MATERIAL FOR THE PEPPER FRUITS STORAGE
Different ways of storage of fruits and vegetables are used depending on the different storage conditions, terms, maturity stages and varieties. The use of technologies for storage fruit and vegetable raw materials with...
DETERMINATION OF THE ACUTE TOXICITY PARAMETERS OF BIOLOGICALLY ACTIVE ADDITIVE «SIVOSELEN PLUS»
The influence of dietary supplement «Sivoselen Plus» on the organism of linear white rats is investigated. The acute toxicity parameters of the additive (the effective and mortality dose rates, its security degree) are c...
PECULIARITIES OF THE CUSTOMS CLEARANCE AND EXPERTISE OF ICE-CREAM CAKES DURING THE EXPORT-IMPORT TRANSACTIONS
Analytical survey of global and Ukrainian ice-cream market and foreign trade was carried out. Annual growth rate of global ice-cream market is up to 4.2%, and it estimated to remain on this level during subsequent five y...