Manufacturing method of electric heating push rod of electronic thermostat of engine

Abstract

The invention discloses a manufacturing method of an electric heating push rod of an electronic thermostat of an engine, which comprises the following steps that: blanking: a hollow steel tube with the length being more than that of the push rod to be processed is cut off by a blanking machine; bottom welding: the bottom of the hollow steel tube is sealed; threading: a magnesium oxide rod or a magnesium oxide tube with the length being less than that of the push rod to be processed is selected, an electric heating wire is uniformly wound outside the magnesium oxide rod or inserted into the magnesium oxide tube; tube penetration: the magnesium oxide rod or the magnesium oxide tube is inserted into the hollow steel tube; filling: heat transfer powder is filled inside the hollow steel tube; tube reduction: the hollow steel tube is reduced through a tube reducing machine; polishing: the surface of the reduced steel tube is polished through a grinding machine; cutting: the steel tube with the surface being polished is cut off by the blanking machine according to the length of the push rod to be processed; and according to the electric heating push rod which is manufactured through the method, a sheet-type heating element of the electronic thermostat is arranged in the push rod, so that the heating element is prevented from deforming and being broken, and the service life of the heating element is ensured.

Description

technical field [0001] The invention relates to an engine, in particular to an engine thermostat, and more particularly to a method for manufacturing an electric heating push rod of an engine electronic thermostat. Background technique [0002] As we all know, the thermostat is an automatic temperature-regulating device that controls the engine coolant to perform a large or small cycle to ensure that the engine works within a suitable temperature range. When the temperature of the coolant is lower than the specified value, the temperature-sensitive paraffin in the thermostat is solid, and the thermostat valve closes the passage between the engine and the radiator under the action of the spring, and the coolant returns directly to the engine through the water pump, which is also It means that the coolant circulates in the engine in a small way; when the temperature of the coolant reaches the specified value, the temperature-sensitive paraffin gradually melts into a liquid, an...

AI Technical Summary

Problems solved by technology

However, since the electric heating sheet directly heats the wax pellets, it is prone to deformation and embrittlement after being heated, and the service life is short. Usually, it needs to be replaced once every six months. If it is not replaced in time, the operating temperature of the engine will be too high, which will affect the service life of the engine. Therefore, how to prolong the service life of the heating element of the electronic thermostat is the key to ensure that the engine works in a suitable temperature range for a long time. Based on this consideration, the applicant designs an electric push rod, which sets the heating element inside the push rod. To prevent the heating element from being deformed or even broken by external force when heated, and to prolong the service life of the heating element of the electronic thermostat. This invention is based on the purpose of developing the manufacturing method of the electric push rod of the electronic thermostat of the engine.

Images