Testing of beveled crimp connections made on a prototype stand
Journal Title: Archives of Mechanical Technology and Materials - Year 2018, Vol 38, Issue
Abstract
The purpose of this study is to form and test inseparable tight joints, commonly used in the construction of heat exchangers, by crimping operation on designed prototype stand. Crimped joints are made by tools in form of cones with two types of shapes, each of designed tools have got identical forming angle. This study uses two types of connecting blocks and plates, differing in diameters of hole and flange. Elaboration contains a case study of joints being made by the stand, which in addition to the crimping operations for some cases were glued or brazed. The article presents the features of the formed joints, by examining them by destructive testing: Micrography, Tensile strength test, and non-destructive testing: Leakage test. Examined elements has been made of aluminum 6060, which is well suited to indirect or direct operations of forming joints for all kinds of coolers or condensers. Elaborated tests and studies in this study allowed to state, that joining the connection block to plate with the small diameter, was more energy-consuming than in sample sets with bigger diameter, use of glue increasing the strength of the joints by 20%, significant strength increase can be obtained after mechanical clinching with brazing operation or modification of geometrical shape of the jaws.
Authors and Affiliations
Nikodem Wróbel, MIchał Rejek, Grzegorz Królczyk
Keywords
Related Articles
- EP ID EP535899
- DOI 10.2478/amtm-2018-0003
- Views 99
- Downloads 0
The influence of cooling techniques on cutting forces and surface roughness during cryogenic machining of titanium alloys
Titanium alloys are one of the materials extensively used in the aerospace industry due to its excellent properties of high specific strength and corrosion resistance. On the other hand, they also present problems wherei...
The influence of vibrations on surface roughness formed during precision boring
In this paper, the analysis of vibrations on surface roughness generated during boring with the application of the conventional boring tool and one with the damper is presented. The experiments included the measurement o...
Reproducibility of machine tools' circularity test according to ISO 230-4 with respect to testing position
In this paper circularity of three different machine tools by Virtual Machine was analyzed. To get circularity we make a ball bar test according to ISO 230-4. The test is very common in engineering for a quick diagnostic...
Sensorless compensation system for thermal deformations of ball screws in machine tools drives
The article presents constructional, technological and operational issues associated with the compensation of thermal deformations of ball screw drives. Further, it demonstrates the analysis of a new sensorless compensat...
ENERGY ANALYSIS OF AN IDEAL SUCTION-PRESSURE UNIT
The article presents an energy analysis of an ideal suction-pressure unit of a radial piston pump of high efficiency. The pump is an important element of a multiplying hydrostatic transmission, which may be used in small...