RU2562579C2 - Feed of processes gases to cutting zone - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: claimed process comprises gas flow ionization in corona discharge. To up the cutting tool life, medium flow is forced before ionization at flow rate of 50-100 l/min through porous-mesh regular structure with directed pores sized to 0.2-1 mm.

EFFECT: cutting tool longer life.

Description

Technical field

The invention relates to technologies for processing materials by cutting, and in particular to methods of supplying activated gaseous lubricating-cooling process media (COTS) to the cutting zone.

State of the art

A known method of cooling the cutting zone (patent RU 2125929), which consists in supplying a gaseous cutting fluid treated in an ionizer in a corona discharge field, at a pressure of at least 0.04 atm, and forming a jet from the gaseous cutting fluid, the length of which is established less than 30 diameters at the exit of the ionizer.

The ionized and ozonized flow of the cutting fluid is supplied to the cutting zone at a speed not less than the cutting speed. As a result, the oxide film formed on the interacting surfaces of the processed material and the cutting tool has a sufficient and uniform thickness, as well as an effective heat removal from the cutting zone.

However, this method cannot ensure the effective formation of protective films on the surface of the tool, because it is not always possible to position the nozzle for supplying an activated gaseous medium in close proximity to the cutting zone, the turbulent stream flowing out of the nozzle is destroyed, mixes with the surrounding stream, the ion concentration decreases, and the turbulence present in the turbulent stream reduces the rate of interaction of the activated gas medium with the working surfaces tool.

Disclosure of invention

The basis of the invention is the task of increasing the resistance of the cutting tool when using activated lubricating-cooling gaseous media due to the formation of oxide films on the interacting surfaces of the tool and the material being processed. The problem is solved by structuring the gaseous flow by passing through a porous-mesh partition of a regular structure. Structurization of the flow reduces the mixing of the activated gaseous medium with the surrounding air, and maintains the optimal concentration of ions in the flow. Reducing turbulence in the feed stream increases the rate of chemical reactions in the contact zone of the tool-workpiece-shavings, accelerates the formation of protective oxide and nitride films.

The method of supplying activated gaseous process media to the cutting zone is to ionize the air flow in the corona discharge. In this case, before the corona discharge, the flow is structured by passing it through a directed porous-mesh partition of a regular structure, which reduces turbulent turbulence. The flow of medium with a flow rate of 50 to 100 l / min is passed through a porous-mesh partition of a regular structure made with directed pores with sizes from 0.1 to 1 mm.

The implementation of the invention

The method for supplying activated gaseous media to the cutting zone is to ionize the gaseous stream in the corona gap with a diameter of 9 to 20 mm with a current passing through the discharge from 150 to 300 μA. Moreover, structuring is performed before the corona discharge, i.e. turbulence of the flow decreases when passing through a porous-mesh septum of a regular structure with directed pores with sizes from 0.2 to 1 mm. The flow rate of the gaseous medium is from 50 to 100 l / min.

Claims (1)

A method for supplying activated lubricating-cooling gaseous media to a cutting zone, including ionization of a gas stream in a corona discharge, characterized in that before ionization, a medium stream with a flow rate of 50 to 100 l / min is passed through a porous-mesh partition of a regular structure made with directed pores with sizes from 0.2 to 1 mm.