Inner cavity spraying method of small-diameter long-axis parts

A technology of small diameter and parts, which is applied in the field of inner cavity spraying of small diameter and long axis parts, which can solve the problems of uneven paint layer, uneven surface of inner cavity, failure to meet the static balance requirements of parts, etc., and achieve uniform coating effect

Inactive Publication Date: 2012-02-22
HARBIN DONGAN ENGINE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the flow of paint liquid, the surface of the inner cavity is uneven, and the sprayed paint layer is uneven. The static balance change value before and after spraying is generally 1000g.mm, but the actual required change value is within 400g.mm. Therefore, the traditional The process method cannot meet the static balance requirements of the parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The short shaft of the transmission system of a certain type of machine has an inner diameter of about Φ112mm and a length of 2403mm. The inner cavity is sprayed:

[0034] 1 Parts are fixed on the rotating mechanism;

[0035] 2 Prepare the paint solution, adjust its viscosity to 12 seconds / coat-4 cups, put the spray gun suction pipe of the high-pressure plunger pump into the prepared paint solution and make the pressure of the high-pressure plunger pump 0.1MPa.

[0036] 3 Carry out inner cavity spraying:

[0037] 1) Fix the long spray gun rod on the spray gun feed device and fully extend the spray gun into the inner cavity of the part, adjust the feed device of the spray gun so that the trajectory of the spray gun coincides with the rotation axis of the part;

[0038] 2) Adjust the rotating mechanism so that the rotational speed of the parts reaches 65r / min, and the feed speed of the spray gun is 0.9m / s;

[0039] 3) Turn on the spray gun switch to spray the inner cavi...

Embodiment 2

[0043] The long axis of the transmission system of a certain type of machine has an inner diameter of about Φ112mm and a length of 3160mm, and the inner cavity is sprayed.

[0044] 1 Parts are fixed on the rotating mechanism;

[0045] 2 Prepare the paint solution, adjust its viscosity to 12 seconds / coat-4 cups, put the spray gun suction pipe of the high-pressure plunger pump into the prepared paint solution and make the pressure of the high-pressure plunger pump 0.1MPa.

[0046] 3 Carry out inner cavity spraying:

[0047] 1) Fix the long spray gun rod on the spray gun feed device and fully extend the spray gun into the inner cavity of the part, adjust the feed device of the spray gun so that the trajectory of the spray gun coincides with the rotation axis of the part;

[0048] 2) Adjust the rotating mechanism so that the rotational speed of the parts reaches 65r / min, and the feed speed of the spray gun is 0.85m / s;

[0049] 3) Turn on the spray gun switch to spray the inner c...

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PUM

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Abstract

The invention is an inner chamber spraying technology of small-diameter and long-axis parts, which uses a long spray gun rod to realize the spraying of long-diameter inner chamber parts; at the same time, it adopts the method of rotating the parts and automatically feeding the spray gun during the spraying process, During the spraying process, the movement track of the spray gun coincides with the rotation axis of the part, which ensures the uniform coating of the inner cavity of the part, avoids other uneven phenomena such as flow marks or missing coatings in the inner cavity paint layer of the part after spraying, and controls the spraying The static balance change value of the front and rear parts is within 300g.mm, which can be widely used for the inner cavity spraying of small diameter and long shaft parts.

Description

technical field [0001] The invention relates to a spraying method, in particular to a spraying method for an inner cavity of a small-diameter long-axis part. Background technique [0002] In the existing spraying method for the inner cavity, a spray gun is generally used for spraying, so that the coating is uniform and the surface is smooth. For the inner cavity spraying of small diameter and long shaft parts, due to the limitation of the structure of the spray gun, the process of pouring paint is often used, that is, the paint liquid is injected into the inner cavity of the part, and the excess paint liquid is poured out after turning over. The process flow is: Inner cavity degreasing→deploying paint solution→injecting paint solution→turning over→paint control→curing. Due to the flow of paint liquid, the surface of the inner cavity is uneven, and the sprayed paint layer is uneven. The static balance change value before and after spraying is generally 1000g.mm, but the actu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/22B05D1/02B05D1/40
Inventor 侯庆英吴军郭利雄辛玉武于忠军
Owner HARBIN DONGAN ENGINE GRP
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