Metal repair adhesive for machining

Abstract

The invention relates to a metal repair adhesive for machining, and belongs to the field of mechanical processing technology. The invention provides a machinable metal repair adhesive. The adhesive is composed of one component comprising by weight 25-35 parts of bisphenol A diglycidyl ether, 0.3-0.7 part of organic polysiloxane,48-65 parts of a metal powder, 2-12 parts of gaseous phase white carbon black, 30-50 parts of a curing agent, 25-45 parts of a low-molecular polyamide resin and 15-25 parts of gaseous phase silica. Compared with the prior art, the invention has the following advantages: 1, the metal repair adhesive has high bond strength and hardness; 2, after curing, the hardness and strength can meet the requirements of machining; and 3, the repair adhesive provided by the invention can be bonded to a metal surface with oil or water, and can cure in oil or water.

Description

technical field [0001] The invention relates to a metal repair adhesive for mechanical processing and belongs to the technical field of mechanical processing. Background technique [0002] In chemical industry, machinery, water supply, heating, gas supply, petroleum and other industries, the welding of metal pipe fittings or devices is generally completed by electric welding, gas welding and other thermal welding processes. The basic working principle of electric welding is that we use the commonly used 220V voltage or The 380V industrial electricity reduces the voltage through the pressure reducer in the welding machine, increases the current, and makes the electric energy generate huge arc heat to melt steel. The integration of welding rods makes the fusion between steel and steel higher, using the flame generated by the mixed combustion of combustible gas and combustion-supporting gas as a heat source, melting the weldment and welding materials to achieve a welding method...

AI Technical Summary

Problems solved by technology

The integration of welding rods makes the fusion between steel and steel higher, using the flame generated by the mixed combustion of combustible gas and combustion-supporting gas as a heat source, melting the weldment and welding materials to achieve a welding method between atoms, but the heat welding The disadvantage is that it cannot be used in flammable, explosive and other occasions, and the second is that it needs to use power or fuel sources, etc., and the conditions of use are subject to certain restrictions.

Most of the existing adhesives are used to bond various non-metallic materials such as wood, plastic, glass, etc., and their bonding strength is generally low, so they are not suitable for bonding various metal materials.

There are also a few adhesives made of phenolic-ethylene, polyurethane and epoxy resin as the main components that can be used to bond metals, but the disadvantages of these adhesives mainly include the following four. One is that its hardness is small, generally at l 7kg / cm

Below the left and right, and its strength is low, generally far lower than the strength of metal parts. Second, after use, it is found that it cannot be bonded on the surface with oil or water, and most of the bonded metal materials have different surfaces in practical applications. Oil or water sticks to a certain extent, so either the surface of the bonded material must be cleaned and dried, which brings great trouble to the use, or the range of use is limited because the surface of the bonded material cannot be cleaned or is not easy to clean. Or affect the effect of bonding; third, because of its small mechanical strength after bonding, especially because of low hardness, it cannot meet the requirements of mechanical processing; fourth, it can only be used for bonding between materials, and cannot be used Repair of Structural Defects