SU1337222A1 - Method of thermal removal of burrs from articles - Google Patents

Description

The invention relates to mechanical engineering, in particular to the processing of metals by burning off surface defects.

A known method of thermally deburring a product, in which the product is placed in a chamber, the chamber is filled with a mixture of combustible gas with oxygen and the mixture is blown up.

The disadvantages of this method are the need for preliminary thorough degreasing of parts. This is due to the fact that the presence of moisture and oils on the surface of parts in combination with oxygen can lead to uncontrolled combustion. This degreasing operation is rather laborious and toxic.

However, it is known that the mixture of natural gas with air does not have the ability to self-ignite in contact with oils.

The aim of the invention is to eliminate the time-consuming and toxic auxiliary operation of degreasing and drying parts and increasing safety by eliminating the uncontrolled ignition of the mixture.

This goal is achieved by the fact that in the method of thermal removal of burrs from products, at which the products are placed in a chamber, the chamber is filled with a mixture of go gas with oxygen and explode the mixture. Before filling the chamber with a mixture of combustible gas with oxygen, the chamber is filled with a mixture of combustible gas with air and ignited this mixture to remove moisture and oil from the surface of the products.

The process in a closed chamber is a wire in two stages. First, fill the chamber with a mixture of combustible gas and air.

Editor E. Sligan

Compiled by A. Nikitin

Tehred M. Didyk Proofreader N. King

Order 4081/14 Circulation 974 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

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the composition and pressure of which is chosen from the condition of providing burnout of the oils and drying the moisture from the surfaces of the parts, and this mixture ignites, the moisture present on the parts evaporates and the oils burn out. Then, the combustion products are removed from the chamber, and then the chamber is filled with the working mixture, namely, a combustible gas with oxygen, and this mixture is ignited to produce a burr burnt on parts.

The method is carried out as follows.

The parts to be processed are loaded into the open chamber. The chamber is hermetically sealed and filled with its combustible mixture of natural gas and air. This mixture is ignited. Then, the combustion products are removed from the chamber to the atmosphere, the chamber is filled with a mixture of oxygen and gas, and the main operation, burnt firing, is carried out.

The method has a significant technical and economic effect, which means that during the operation of firing burrs according to a known method, thorough preparation of the parts before loading into the chamber, including degreasing and drying of these parts due to the danger of spontaneous explosion at the contact of oil, is necessary located on the parts, and oxygen injected into the chamber. Such preparation is laborious and toxic. The proposed method eliminates these additional operations, and this results in cost effectiveness and a significant improvement in the labor conditions when performing the firing of the burrs in this method.

Claims (1)

METHOD OF THERMAL REMOVAL OF ADHESTERS FROM THE PRODUCT, in which the products are placed in the chamber, they fill the chamber with a mixture of combustible gas with oxygen and explode the mixture, characterized in that, in order to increase safety by eliminating uncontrolled ignition of the mixture, before filling the chamber with a mixture of combustible gas with oxygen, the chamber filled with a mixture of combustible gas with air and set fire to this mixture to remove moisture and oil from the surface of the product. SO with m u z ke 1 13;