Manuylov Roman

The purpose and problems

Main problem

1. The description of system of automatic rotation of products.

Literature

The purposes and problems

To automate process of revolution of products for bilaterial жарки.

The given purpose can be reached by the decision of following problems:

- To develop the mechanism of revolution of products;

- To make its pneumatic and electric schemes.

Main problem

Now even more often for automation of productions and separate operations the new branch of technics - mechanotronics which includes set of mechanical, hydraulic, pneumatic, electronic elements is used. The wide circulation is received recently by pneumoautomatics thanks to a number of essential advantages of pneumatic systems: easy management of executive mechanisms, rather a great speed of working moving, etc. Electrohydraulic and electropneumatic systems of automatic control receive more and more a wide circulation in the most various areas of technics, including robotechical and the automated complexes machine-building, space, aviation, chemical, food, nuclear and other industries. Combining known advantages of electric communication and management with speed and relative ease powerful hydro- and pneumodrives, these systems supersede purely mechanical and electric control systems and the control.

Pneumatic devices play the important role in manufacture mechanisation. Recently they also are widely used at the decision of problems of automation.

1. The description of system of automatic revolution of a product.

For the decision of a task in view I suggest to use the following scheme:

Fig. 1 Appearance of the mechanism.

The given system (Fig. 1) consists of three pneumocylinders: two pneumocylinders of forward action (1.0 and 2.0) and one rotary pneumocylinder (3.0), and also an executive office, in the form of a shovel.

The given system works as follows: the cylinder of horizontal moving 2.0 moves system so that the executive office has appeared under a product, then the cylinder of vertical moving 1.0 lifts system that the product has appeared over oil level then the rotary pneumocylinder 3.0 carries out product revolution. 

For the decision of the given problem we will make the pneumoelectric scheme of automatics which will realise it:

Fig. 2 Basic pneumatic and electric schemes.

On fig. 2 following designations are accepted:

      0.1 – the block of preparation of air;

      1.0 and 2.0 – bilaterial pneumocylinders with trailer gauges;

      3.0 – the rotary pneumocylinder;

      1.1, 2.1 and 3.1 – 4/2 distributors with bilaterial electromagnetic pilot management and manual duplication;

      К1 – The relay;

      К2 – The optical gauge;

      D1 – D6 – magnetic gauges

      Y1 – Y6 – the electromagnets operating pneumodistributors.

The given scheme works as follows: air under pressure moves from the block of preparation of air 0.1 on the distributor 1.1, 2.1 and 3.1; At product passage through optical gauge K2 the chain becomes isolated and the signal on electromagnet Y1 of the distributor 1.1 is given and air under pressure arrives in the executive cylinder 1.0. It vertically moves the mechanism (fig. 1).

When 1.0 reaches extreme position works gauge D2 which closes a chain and gives a signal on electromagnet Y3, the distributor 2.1 and air under pressure arrives in the pneumocylinder 2.0. It horizontally moves the mechanism. When 2.0 reaches extreme position works D4, the signal on Y5 is given and air arrives in the rotary pneumocylinder 3.0 which carries out executive office turn. After realisation of turn the system comes back in a starting position.

Literature

1. Электропневмоавтоматика в производственных процессах: Учебное пособие; под редакцией Е.В. Пашкова. – 2-е издание, переработанное и дополненное. – Севастополь: издательство СевНТУ, 2003. -496с., ил.

2.   Расчет пневмоприводов: Справочное пособие. Е.В. Герц, Г.В. Крейнин. – Москва: «Машиностроение», 1975. -274с.