Multi-station welding device and method for auto expansion valve

Abstract

The invention discloses a multi-station welding device and a multi-station welding method for an auto expansion valve. The multi-station welding device comprises a preparation workstation, a preheating workstation, a high-frequency heating workstation, a water-cooling workstation, a cleaning workstation, a washing workstation, a workbench, a baffle and a working disk. The invention is applicable in the welding of a component which is welded by way of high-frequency heating and of which the face of weld is a plane. The multi-station welding method comprises the following steps: starting a switch of a machine, and putting the expansion valve and welding materials on the preparation workstation; when an infrared sensor senses that the expansion valve is on the preheating workstation, descending a fire-heating pipe to preheat the expansion valve and the welding materials; at the preset heating time, rotating the working disk to sequentially carry out high-frequency heating, water cooling, cleaning and washing, then taking down the expansion valve. The six processes of the welding device shown in the invention form flow line production, the production efficiency is high, the using method is simple, no high skills of operators are required and the welding device is applicable in the welding of various auto expansion valves.

Description

technical field [0001] The invention relates to a multi-station welding device and method for an automobile expansion valve. Background technique [0002] The automobile air-conditioning refrigeration system adopts a temperature-sensing expansion valve, which uses the temperature sensitivity of the sensitive gas in the temperature-sensing package (for example, Freon is liquid at low temperature and vaporized at high temperature) to control the opening and closing of the valve, that is, it is installed at the outlet of the evaporator The temperature sensing package senses the superheat of the refrigerant vapor (the superheat refers to the value that the actual temperature of the vapor is higher than the evaporation temperature), so as to adjust the opening of the expansion valve, thereby controlling the flow of liquid refrigerant entering the evaporator. Therefore, the sealing performance of the automobile expansion valve is extremely high. Once the gas in the temperature sen...

AI Technical Summary

Problems solved by technology

However, most of the automobile expansion valves are small parts, and the heating in the furnace is a large batch of simultaneous heating, which will cause uneven heating of the automobile expansion valve, too low temperature, incomplete welding, low welding quality, and too high temperature, which will affect the inside of the automobile expansion valve. precision components

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