Manufacturing process of motor train unit air conditioner flat top composition

Abstract

The invention discloses a motor train unit air conditioner flat top assembly manufacturing process, which is characterized in that welding quantity and plug welding holes of a welding base plate are reserved through machining, so that subsequent welding is convenient to implement; the angle aluminum reinforcing ribs are additionally arranged, so that deformation in the welding and carrying process is prevented; a key hole and a positioning hole are integrally machined after welding, and the integrity and the figure of the installation size are guaranteed; a key hole is machined through a screw machine with the feed amount of 4 mm, the welding sequence of the patch plate 2 and the patch plate 3 is adjusted till overall machining is completed, machining aluminum scraps are blown out through a high-pressure air pipe, then welding is conducted, it is guaranteed that no aluminum scraps exist in an aluminum profile inner cavity, and abnormal sound caused by residual aluminum scraps in the aluminum profile inner cavity in the running process of a bullet train is prevented; a detailed assembling and welding method of the reinforcing plate 2 and the reinforcing plate 3 is formulated, collapse between the reinforcing plates and the profile caused by welding is prevented, the whole process adopts sub-process assembly line work, single-process operation becomes simple, the duration time becomes short, the process cohesion becomes strong, the production period becomes short, and the working efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing, in particular to a manufacturing process for an air-conditioning flat-roof component of an EMU. Background technique [0002] As the main equipment for the exchange of air inside and outside the car, the discharge of dirty air, air filtration, cooling or heating, humidification or dehumidification, the air conditioner of the EMU has the function of controlling the temperature, humidity, wind speed, cleanliness and noise inside the EMU. It is the main facility to improve the comfort in the car and improve the riding environment. As people's requirements for life are getting higher and higher, the requirements for riding are also gradually improved, the functions of air conditioners are gradually increased, and the weight of air conditioners also increases. It also bears dynamic load with the speed change and vibration during the operation of the motor car, and its safety requirements are ge...

AI Technical Summary

Problems solved by technology

Therefore, the quality of the welds in the air-conditioning flat roof of the EMU is extremely important. The welds require CPC2 welds, the inspection level is CT3, the weld defect level is C, and the standard requires 100% non-destructive testing, and the main welds also need Sealing requirements, in addition, due to the dense welds at the four corners of the flat roof of the air conditioner, the welds form a three-dimensional superimposed shape, and the stress is superimposed, resulting in a large amount of deformation, and the flatness, straightness, overall contour and dimensional tolerance of the flat roof of the air conditioner are more demanding. High, difficult to adjust, can not meet customer needs well

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