Dacromet surface treatment device for complex automobile structural part

Abstract

The invention discloses a Dacromet surface treatment device for a complex automobile structural part, and relates to the technical field of workpiece coating. The Dacromet surface treatment device comprises a base, a supporting frame, a dip-coating mechanism and a splash-proof swing mechanism, wherein the supporting frame is arranged on the base, and two symmetrically-arranged guide grooves are formed in the supporting frame. According to the Dacromet surface treatment device, the dip-coating mechanism and the splash-proof swing mechanism are arranged, so that workpieces such as an engine exhaust pipe are coated in a dipping-spin-drying mode, the workpiece surface treatment efficiency is improved, phenomena of gel and layering of coating liquid are prevented, and the different dip-coatingeffects of the workpiece surfaces are avoided; air attached to corresponding portions such as deep holes and narrow cavities can be effectively broken, so that the whole workpieces can be effectivelydip-coated; and a second hydraulic cylinder and a baffle are arranged in the splash-proof swing mechanism, so that the workpieces can be timely blocked during spin-drying, the centrifugal speed does not need to be reduced to prevent the coating liquid from splashing, and the surface treatment efficiency is further improved while thorough spin-drying is guaranteed.

Description

technical field [0001] The invention relates to the technical field of workpiece coating, in particular to a Dacromet surface treatment device for complex automotive structural parts. Background technique [0002] Various pipes or cavity parts with complex shapes on the car, such as the exhaust pipe of the engine, etc., due to the complex shape and the presence of several deep holes on the workpiece and slits on the inner wall, in the presence of electrostatic shielding effect, It is impossible to use electroplating for uniform overall protection, but the Dacromet process can form a good protective film in close contact gaps through the excellent penetrating ability of the treatment liquid, especially suitable for auto parts with complex tubes and cavities Anti-corrosion, because the existing engine exhaust pipe is a relatively large workpiece, it cannot be mixed in the workpiece basket for drying, and can only be coated by dipping and draining. [0003] However, there are ...

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Problems solved by technology

[0002] Various pipes or cavity parts with complex shapes on the car, such as the exhaust pipe of the engine, etc., due to the complex shape and the presence of several deep holes on the workpiece and slits on the inner wall, in the presence of electrostatic shielding effect, It is impossible to use electroplating for uniform overall protection, but the Dacromet process can form a good protective film in close contact gaps through the excellent penetrating ability of the treatment liquid, especially suitable for auto parts with complex tubes and cavities Anti-corrosion, the existing engine exhaust pipe is a relatively large workpiece, which cannot be mixed in the workpiece basket for drying, and can only be coated by dipping and draining

[0003] However, there are still some disadvantages in the dipping-draining coating method for such workpieces: 1. In order to prevent the coating from settling, it is necessary to add a thickener, but the draining process takes a long time, and the coating solution is prone to gelation. And delamination phenomenon occurs, resulting in incomplete dip coating on the surface of the workpiece; 2. Directly immersed in the dipping liquid, workpieces with deep holes, narrow cavities, slits or inner walls of elbows will store air in the corresponding parts and immerse to the liquid level Air bubbles are attached after the coating liquid is not completely coated, resulting in missing coating; 3. In order to achieve a qualified coating thickness, it is necessary to repeat the dipping coating two to three times, and the coating in the draining method will partially slide off and concentrate to The lower side will cause the subsequent dip coating to increase the degree of accumulation on the original basis, which will waste raw materials and cause assembly deviation

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