Producing corrugated ring drum walls by means of toothed rollers

Metal packaging drums are used in the production and transportation of electric cable pro-ducts, coiled pipes of ferrous and non-ferrous metals, and copper strips. These drums are available in a large range of sizes, enabling the packaging of products weighing up to several tons. Unlike wooden packaging drums, which are normally single use, metal packaging drums with high structural rigidity can be used repeatedly. The rigidity of the drums is ensured by the use of corrugated metal walls made in the form of rings. At the present time the corrugated ring drum walls are cold stamped on presses. The purpose of this work was to develop an alternative technology for the production of corrugated ring strips using conical toothed rollers. In metal rolling production, conical rollers are used in the manufacture of special types of rolled products, such as for example, thin discs. Due to uneven deformation along the width of the strip, the use of conical rollers enables an article of the required curvature to be obtained. Concurrently with this, by analyzing the methods and equipment used to obtain corrugated strips and belts with longitudinal and transverse corrugations, corrugation technologies using geared rollers are being increasingly used. Based on this development, it appears viable to use a combination of these two technologies and perform the corrugation process by means of conical geared rollers, in order to obtain corrugated ring strips. This paper proposes a method for calculating the geometric parameters of the forming tool, and an experimental tool was developed to produce corrugated rings and to check the developed method. The toothed rollers were manufactured in the technology park of the Institute of Experimental Mechanical Engineering of SUSU NRU at the 5-coordinate digital control centre type MNV-4000 by MoriSeiko (Japan). The work carried out on the equipment to simulate the process of obtaining corrugated rings confirmed the possibility of using the methodology developed to calculate the geometric parameters of the rollers. It also enabled researchers to define the specific features of the manufacture of corrugated rings and facilitated the development and design of an experimental industrial work bench for the production of packaging drum walls.