Categoryissue 2019-03

ADHESIVE MIXING AND APPLYING DEVICE

A

The aim of the present article is to present the design concept of a specialized device for mixing and applying adhesives (one and two-component ones) intended for unit production or laboratory use. The paper presents the initial assumptions of the device design, such as the type of production, application method and adhesive properties. Technological requirements for the adhesive mixing and applying device were enumerated. The technological requirements will include the characteristics of the method of adhesive application. The construction requirements of the designed device are also presented. The design of this device has been presented in the form of a 3D model, made with use of the SolidEdge software. The advantages and limitations of the concept of the designed device were also presented.

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E-CAR’S DOOR BEAM OPTIMIZATION

E

The design of the shell and tube heat exchangr includes a tube-like shell with holes to which an inlet and outlet pipes are welded. Radial and tangential holes are produced manual-ly by means of plasma cutting with the use of specialized tools, which determines high labo-riousness of heat exchangers production. An automatic device is proposed to reduce the laboriousness of this operation. To produce the hole in the heat exchanger shell, two reversible motions are superimposed: linear motion of the cutter along the longitudinal axis of the shell and the shell rotary motion. A mathematical model of the required cutter motion is proposed, which describes the relative trajectories of the plasma cutter and the shell in parametric form. To verify theoretical premises, a prototype of the device was produced using a 3D pro-totyping technology, a ball screw for the reversible linear motion of the cutter and a stepper motor for the reversible rotary motion of the shell. The shell is fixed by means of a collet chuck and rests on the pipe roller support.

Full publication available in open access on our issues page.

HEURISTIC METHOD OF ASSEMBLY SCHEDULING OF MULTI-OPTION PRODUCTS

H

The design of the shell and tube heat exchanger includes a tube-like shell with holes to which an inlet and outlet pipes are welded. Radial and tangential holes are produced manual-ly by means of plasma cutting with the use of specialized tools, which determines high labo-riousness of heat exchangers production. An automatic device is proposed to reduce the laboriousness of this operation. To produce the hole in the heat exchanger shell, two reversible motions are superimposed: linear motion of the cutter along the longitudinal axis of the shell and the shell rotary motion. A mathematical model of the required cutter motion is proposed, which describes the relative trajectories of the plasma cutter and the shell in parametric form. To verify theoretical premises, a prototype of the device was produced using a 3D pro-totyping technology, a ball screw for the reversible linear motion of the cutter and a stepper motor for the reversible rotary motion of the shell. The shell is fixed by means of a collet chuck and rests on the pipe roller support.