CN101303267A - Aluminum alloy car body coloring pervasion weld seam leakage testing technological process - Google Patents

Abstract

The present invention provides a dye penetration welding line leakage test process for an aluminium alloy car body, comprising the steps of eliminating all of the oxide scale, pocking and dust on the welding line to be tested; washing the oil contamination off the welding line to be tested and cleaning the welding line by a piece of clean cloth or cotton yarn; spraying and coating osmotic agent evenly on the outside of the welding line to be tested every 2 to 3 minutes, making sure that the welding line is wet within 10 to 15 minutes; observing whether leakage exists on the other side of the welding line or not and mending the welding line if leakage exists. Therefore, the probability that the welding line on the car top leaks can be avoided by using the process with high technique sensitivity and reliability surpassing the rain test in the present invention, and the probability of accumulated water pollution caused by the rain test in workshop can also avoided. Furthermore, the quality of the welding line surface on the car top can be ensured through fault detection because the process can be performed easily without any other devices and the result is easy to observe. General process workers can perform the dye penetration welding line leakage test process after a simple training, thus, professional fault detection workers are not necessary.

Description

Aluminum alloy car body coloring pervasion weld seam leakage testing technological process

Technical field

The present invention relates to a kind of liquid penetration detection, especially relate to a kind of aluminum alloy car body coloring pervasion weld seam leakage testing technological process.

Background technology

Leak test (leak detection) is the Dynamic Non-Destruction Measurement that detecting liquid or gas spill from pressure resistant vessel or infiltrates from the outside.Along with the modernization of industry and science and technology development, it is more and more important that leak detection seems.Simultaneously, liquid infiltration detection method also is a kind of lossless detection method of check aluminum alloy welding seam surface flaws, bleeding agent is applied to the aluminum alloy welding seam surface, bleeding agent can penetrate in the face of weld flaws owing to capillary action, remove bleeding agent, dry and apply developer after, visual examination can be found the defective on the face of weld.

At present, aluminum alloy bodywork roof weld seam leak test adopts salt fog test usually, if but the workshop does not have drainage equipment, and ponding can cause severe contamination, therefore, is badly in need of research and development and is suitable for the drainless coloring pervasion weld seam leakage testing technology in workshop.

Summary of the invention

Technical matters to be solved by this invention provides a kind of roof weld seam leakage check technology method that use in drainless workshop that is suitable for, and this method dirigibility is strong, versatility is high, has improved product quality, has improved throughput rate, shortens the product manufacturing cycle.

For solving the problems of the technologies described above, the invention provides a kind of aluminum alloy car body coloring pervasion weld seam leakage testing technological process, it is characterized in that: comprise the following steps:

(1) oxide skin, corrosion, the dust that will be detected weld seam eliminated clean;

(2) clean the greasy dirt attachment be detected weld seam with clean-out system, and with clean cloth or cotton yarn wiped clean;

(3) spray bleeding agent equably in the outside that is detected weld seam, guarantee moist state 10～15min, once every 2～3min spraying;

(4) observation has ne-leakage at the weld seam opposite side, if there is seepage, must repair by butt welded seam, to reach the effect that prevents the roof leaking of roof weld seam.

In order to guarantee the face of weld quality, behind the weld seam leak test, carry out the weld seam permeation flaw detection.

Coloring pervasion weld seam leakage testing technology of the present invention is applied to aluminium alloy roof weld seam.Aluminium alloy roof weld seam generally adopts the welding technology of single face welding and double face shaping, simultaneously detection technique is also had higher requirement, and by implementing this technology, has avoided the possibility of roof weld seam rain leakage.Coloring pervasion weld seam leakage testing technique sensitiveness height, reliability more surpass the experiment of drenching with rain, and have avoided the workshop to drench with rain testing causing the ponding contamination of heavy.This process is simple to operate, does not need instrument, and visual result is convenient to observe, and when avoiding the weld seam rain leakage, has more guaranteed roof face of weld quality by flaw detection.Coloring pervasion weld seam leakage testing technology does not need professional flaw detection personnel, and general operation personnel can operate by simple training.

Embodiment

Embodiment 1

Eliminate the factor that is detected oxide skin, corrosion, dust and the relevant influence flaw detection of weld seam clean; Clean the greasy dirt attachment be detected weld seam with clean-out system, and with clean cloth or cotton yarn wiped clean; Spray bleeding agent equably in the outside that is detected weld seam, guarantee moist state 10min, once every the 2min spraying; Observation has ne-leakage at the weld seam opposite side, if there is seepage, must repair by butt welded seam, to reach the effect that prevents the roof leaking of roof weld seam; Behind the weld seam leak test, carry out the weld seam permeation flaw detection, must not be higher than 70 ℃ by being visited the position surface temperature, observe whether defectiveness display trace of roof weld seam, determine that this vestige is that true defect or Artifact show, and by standard to the defective grading to determine whether repairing.

Embodiment 2

Eliminate the factor that is detected oxide skin, corrosion, dust and the relevant influence flaw detection of weld seam clean; Clean the greasy dirt attachment be detected weld seam with clean-out system, and with clean cloth or cotton yarn wiped clean; Spray bleeding agent equably in the outside that is detected weld seam, guarantee moist state 15min, once every the 3min spraying; Observation has ne-leakage at the weld seam opposite side, if there is seepage, must repair by butt welded seam, to reach the effect that prevents the roof leaking of roof weld seam; Behind the weld seam leak test, carry out the weld seam permeation flaw detection, must not be higher than 70 ℃ by being visited the position surface temperature, observe whether defectiveness display trace of roof weld seam, determine that this vestige is that true defect or Artifact show, and by standard to the defective grading to determine whether repairing.

Embodiment 3

Eliminate the factor that is detected oxide skin, corrosion, dust and the relevant influence flaw detection of weld seam clean; Clean the greasy dirt attachment be detected weld seam with clean-out system, and with clean cloth or cotton yarn wiped clean; Spray bleeding agent equably in the outside that is detected weld seam, guarantee moist state 12.5min, once every the 2.5min spraying; Observation has ne-leakage at the weld seam opposite side, if there is seepage, must repair by butt welded seam, to reach the effect that prevents the roof leaking of roof weld seam; Behind the weld seam leak test, carry out the weld seam permeation flaw detection, must not be higher than 70 ℃ by being visited the position surface temperature, observe whether defectiveness display trace of roof weld seam, determine that this vestige is that true defect or Artifact show, and by standard to the defective grading to determine whether repairing.

Claims (2)

1, a kind of aluminum alloy car body coloring pervasion weld seam leakage testing technological process is characterized in that: comprise the following steps:

(1) oxide skin, corrosion, the dust that will be detected weld seam eliminated clean;

(2) clean the greasy dirt attachment be detected weld seam with clean-out system, and with clean cloth or cotton yarn wiped clean;

(3) spray bleeding agent equably in the outside that is detected weld seam, guarantee moist state 10～15min, once every 2～3min spraying;

(4) observation has ne-leakage at the weld seam opposite side, if there is seepage, must repair by butt welded seam, to reach the effect that prevents the roof leaking of roof weld seam.

2, aluminum alloy car body coloring pervasion weld seam leakage testing technological process according to claim 1 is characterized in that: after also comprising the weld seam leak test, carry out the weld seam permeation flaw detection.