Whole machine paint spraying process of diesel engine

A diesel engine and complete machine technology, applied in the direction of pretreatment surface, coating, surface coating liquid device, etc., can solve the problems of normal production of coating line, influence of paint adhesion, line stop, etc., to save manpower and production costs, to ensure the paint curing effect, to improve the effect of paint adhesion

Active Publication Date: 2014-06-11
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in domestic diesel engine painting, there are generally no strict requirements on the ambient temperature of diesel engine painting and the surface temperature of diesel engine, but if the temperature difference between the two is too large, it will affect the paint adhesion
After the diesel engine is painted, although the paint can be cured quickly through the paint drying room, the surface paint film is still relatively soft. If the peripheral parts are assembled on the finishing line immediately, it is easy to produce bumps and damage, which will affect the appearance quality of the diesel engine.
In addition, in the traditional diesel engine painting production line, when reworked vehicles or buffered diesel engines need to be painted, they usually go online temporarily through the on-line or off-line points. No matter what method is used, it will affect the normal production of the painting line. even stop the line

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment one: a kind of painting process of diesel engine complete machine, comprises the following steps:

[0022] (1) Bandaging before cleaning: Wrap up the intake port of the diesel engine, the inlet of the supercharger, the outlet of the supercharger, the mouth of the thermostat and the sensor with a sealing sleeve; wrap the electronic control unit (ECU), The oil pump, supercharger and starter are wrapped with protective bags;

[0023] (2) Complete machine cleaning: The diesel engine is subjected to four processes of pre-degreasing, degreasing, hot water rinsing, and rinsing in the complete machine cleaning machine; the water temperature of the pre-degreasing process is 50°C, and a relative water quality of 3 % metal cleaning agent, the cleaning time is 3min, and the spray pressure is 0.06MPa; the water temperature of the degreasing process is 50°C, and a metal cleaning agent with a relative water quality of 3% is added to the water, the cleaning time is 3min, and...

Embodiment 2

[0031] Embodiment two: a kind of painting technique of diesel engine complete machine, comprises the following steps:

[0032] (1) Bandaging before cleaning: Wrap up the intake port of the diesel engine, the inlet of the supercharger, the outlet of the supercharger, the mouth of the thermostat and the sensor with a sealing sleeve; wrap the electronic control unit (ECU), The oil pump, supercharger and starter are wrapped with protective bags;

[0033] (2) Complete machine cleaning: The diesel engine is subjected to four processes of pre-degreasing, degreasing, hot water rinsing, and rinsing in the complete machine cleaning machine; the water temperature of the pre-degreasing process is 60 ° C, and a relative water quality of 5 % metal cleaning agent, the cleaning time is 2min, and the spray pressure is 0.1MPa; the water temperature of the degreasing process is 60°C, and 5% metal cleaning agent is added to the water, the cleaning time is 2min, and the spray pressure is 0.1MPa; th...

Embodiment 3

[0041] Embodiment three: a kind of painting process of diesel engine complete machine, comprises the following steps:

[0042] (1) Bandaging before cleaning: Wrap up the intake port of the diesel engine, the inlet of the supercharger, the outlet of the supercharger, the mouth of the thermostat and the sensor with a sealing sleeve; wrap the electronic control unit (ECU), The oil pump, supercharger and starter are wrapped with protective bags;

[0043] (2) Complete machine cleaning: The diesel engine is subjected to four processes of pre-degreasing, degreasing, hot water rinsing, and rinsing in the complete machine cleaning machine; the water temperature of the pre-degreasing process is 55°C, and a relative water quality of 4 % metal cleaning agent, the cleaning time is 2.5min, and the spray pressure is 0.08MPa; the water temperature of the degreasing process is 55°C, and a metal cleaning agent with a relative water quality of 4% is added to the water, and the cleaning time is 2...

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PUM

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Abstract

The invention relates to a whole machine paint spraying process of a heavy-duty diesel engine. The paint spraying process mainly includes: wrapping before washing of the diesel engine; whole machine washing; whole machine water blowing; moisture drying and strong freezing; shielding before painting; whole machine paint spraying and leveling; wrapping removal, writing brush paint make-up, varnish spraying and leveling; paint drying and strong freezing; natural cooling; paint film thickness detection. The whole machine paint spraying process of the diesel engine effectively saves manpower and production cost, improves whole machine paint spraying quality through control of key process parameters in a whole machine paint spraying process of the diesel engine, distributes technological processes reasonably, guarantees paint solidification effect, and improves starting rate of a production line.

Description

technical field [0001] The invention relates to a painting process for auto parts, in particular to a painting process for a complete diesel engine, and belongs to the technical field of diesel engine production. Background technique [0002] In the process of diesel engine production, it is necessary to spray paint on the whole diesel engine to improve the anti-rust effect of the surface of the diesel engine. At present, in domestic diesel engine painting, there are generally no strict requirements on the ambient temperature of diesel engine painting and the surface temperature of diesel engine, but if the temperature difference between the two is too large, it will affect the paint adhesion. After the diesel engine is painted, although the paint can be cured quickly through the paint drying room, the surface paint film is still relatively soft. If the peripheral parts are assembled immediately on the finishing line, it is easy to produce bumps and damage, which will affect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D1/02B05D1/32B05D1/36B05D3/00B05D3/04
Inventor 李建刚朱炜许戈张立李红剑宋蔚庄纯毅曾坤华青松
Owner CHINA FIRST AUTOMOBILE
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