CN105717134A - Penetrant testing process - Google Patents

Abstract

The invention discloses a penetrant testing process. The penetrant testing process comprises the following steps: 1) basic procedures of penetrant testing; 2) surface preparation; 3) an application method of a penetrant; 4) application of a developer; and 5) observation and evaluation of defect marks. The penetrant testing process provided by the invention is simple to operate, has low requirements on experience of operators and enables product quality to be high.

Description

A kind of penetrant inspection technique

Technical field

The present invention relates to a kind of penetrant inspection technique.

Background technology

The adjustment in processing step and device parameter etc. of the existing penetrant inspection technique there is also certain empirical and technical, for the operator newly started with, in addition it is also necessary to carry out substantial amounts of exercise and could grasp operation skill, produces the good product of quality.

Summary of the invention

In order to realize the purpose of the present invention, the present invention provides the penetrant inspection technique of a kind of easy to operate, quick, easy left-hand seat.

For solving above-mentioned technical problem, the present invention adopts the following technical scheme that

A kind of penetrant inspection technique, including following operation:

1), the base program of penetrant inspection；

1.1) prerinse；

1.2) penetrating fluid is applied；

1.3) unnecessary penetrating fluid is cleaned；

1.4) developer is applied；

1.5) observe and evaluation shows trace；

2), surface prepares: surface of the work must not have rust, oxide skin, spatter, iron filings, burr and various overcoat, a prerinse it is also performed to after removing surface, to remove detection surface smut, clean range is detection position surrounding outward expansion 25mm；After cleaning, the solvent that detection faces is left over, moisture must dry, and not contaminated before maintenance penetrating agent applying；

3), penetrating agent applying method: spray cans sprays, and during spraying, nozzle carries out from detection faces 40～400mm；

3.1) time of penetration and: temperature is at the temperature conditions of 15～50 DEG C, the time of penetration of infiltration is generally no less than 10 minutes, when temperature conditions can not meet above-mentioned condition, detection method when tackling relatively low or higher temperature makes qualification, it is common to use aluminium alloy reference block carries out；If in 15～50 DEG C of temperature and outside this temperature range, reference block showing, mark trace is substantially the same, then it is believed that the method adopted is feasible；

3.2) unnecessary penetrating agent is cleaned: during the penetrating agent of the tested excess surface of cleaning workpiece, carry out wiping examination with the clean cloth not lost hair or feathers or paper that are sprayed with abluent, must not back and forth wiping, also not handy abluent directly rinses, during cleaning, it should be noted that prevent transition from cleaning and making detection Quality Down, it should also be noted that prevent from cleaning not enough and causing and defect display is identified difficulty；

4), apply developer: before spraying developer, developer fully should be shaken uniformly, in detection faces, then spray uniform and thin developer, can not in the repeated multiple times applying in same place, during sprinkling, nozzle is 300～400mm from detection faces distance, and spraying direction with plane was seized angle is 30～40 °；Time of developing depends on developer kind, defect size and examined workpiece temperature, generally should less than 7 minutes；

5), defect mark trace is observed and evaluation；

5.1) observing display trace to carry out in 7～30 minutes after developer applies, the size such as display trace does not change, it is possible to exceed the above-mentioned time；

5.2) defect mark trace is observed and should be carried out under sufficient light, recognizes that 5～10 times of magnifieres of application are observed for tiny defect mark trace；

5.3) decapacitation determines that mark trace is due to outside misoperation causes, and other incisura trace shows and all processes as defect mark trace；

5.4) length-width ratio defect mark trace more than 3, processes by linear discontinuities, otherwise presses circular flaw and processes；

5.5), when the angle of defect mark trace long axis direction and axis of workpiece is more than or less than 30 °, process as transverse defect.

The present invention is simple to operate, and operator's skill requirement is low, and product quality is high.

Detailed description of the invention

Below in conjunction with embodiment, the invention will be further described:

A kind of penetrant inspection technique, including following operation:

1), the base program of penetrant inspection；

1.1) prerinse；

1.2) penetrating fluid is applied；

1.3) unnecessary penetrating fluid is cleaned；

1.4) developer is applied；

1.5) observe and evaluation shows trace；

2), surface prepares: surface of the work must not have rust, oxide skin, spatter, iron filings, burr and various overcoat, a prerinse it is also performed to after removing surface, to remove detection surface smut, clean range is detection position surrounding outward expansion 25mm；After cleaning, the solvent that detection faces is left over, moisture must dry, and not contaminated before maintenance penetrating agent applying；

3), penetrating agent applying method: spray cans sprays, and during spraying, nozzle carries out from detection faces 40～400mm；

3.1) time of penetration and: temperature is at the temperature conditions of 15～50 DEG C, the time of penetration of infiltration is generally no less than 10 minutes, when temperature conditions can not meet above-mentioned condition, detection method when tackling relatively low or higher temperature makes qualification, it is common to use aluminium alloy reference block carries out；If in 15～50 DEG C of temperature and outside this temperature range, reference block showing, mark trace is substantially the same, then it is believed that the method adopted is feasible；

3.2) unnecessary penetrating agent is cleaned: during the penetrating agent of the tested excess surface of cleaning workpiece, carry out wiping examination with the clean cloth not lost hair or feathers or paper that are sprayed with abluent, must not back and forth wiping, also not handy abluent directly rinses, during cleaning, it should be noted that prevent transition from cleaning and making detection Quality Down, it should also be noted that prevent from cleaning not enough and causing and defect display is identified difficulty；

4), apply developer: before spraying developer, developer fully should be shaken uniformly, in detection faces, then spray uniform and thin developer, can not in the repeated multiple times applying in same place, during sprinkling, nozzle is 300～400mm from detection faces distance, and spraying direction with plane was seized angle is 30～40 °；Time of developing depends on developer kind, defect size and examined workpiece temperature, generally should less than 7 minutes；

5), defect mark trace is observed and evaluation；

5.1) observing display trace to carry out in 7～30 minutes after developer applies, the size such as display trace does not change, it is possible to exceed the above-mentioned time；

5.2) defect mark trace is observed and should be carried out under sufficient light, recognizes that 5～10 times of magnifieres of application are observed for tiny defect mark trace；

5.3) decapacitation determines that mark trace is due to outside misoperation causes, and other incisura trace shows and all processes as defect mark trace；

5.4) length-width ratio defect mark trace more than 3, processes by linear discontinuities, otherwise presses circular flaw and processes；

5.5), when the angle of defect mark trace long axis direction and axis of workpiece is more than or less than 30 °, process as transverse defect.

Claims (1)

1. a penetrant inspection technique, it is characterised in that include following operation:

1), the base program of penetrant inspection；

1.1) prerinse；

1.2) penetrating fluid is applied；

1.3) unnecessary penetrating fluid is cleaned；

1.4) developer is applied；

1.5) observe and evaluation shows trace；

2), surface prepares: surface of the work must not have rust, oxide skin, spatter, iron filings, burr and various overcoat, a prerinse it is also performed to after removing surface, to remove detection surface smut, clean range is detection position surrounding outward expansion 25mm；After cleaning, the solvent that detection faces is left over, moisture must dry, and not contaminated before maintenance penetrating agent applying；

3), penetrating agent applying method: spray cans sprays, and during spraying, nozzle carries out from detection faces 40～400mm；

3.1) time of penetration and: temperature is at the temperature conditions of 15～50 DEG C, the time of penetration of infiltration is generally no less than 10 minutes, when temperature conditions can not meet above-mentioned condition, detection method when tackling relatively low or higher temperature makes qualification, it is common to use aluminium alloy reference block carries out；If in 15～50 DEG C of temperature and outside this temperature range, reference block showing, mark trace is substantially the same, then it is believed that the method adopted is feasible；

3.2) unnecessary penetrating agent is cleaned: during the penetrating agent of the tested excess surface of cleaning workpiece, carry out wiping examination with the clean cloth not lost hair or feathers or paper that are sprayed with abluent, must not back and forth wiping, also not handy abluent directly rinses, during cleaning, it should be noted that prevent transition from cleaning and making detection Quality Down, it should also be noted that prevent from cleaning not enough and causing and defect display is identified difficulty；

4), apply developer: before spraying developer, developer fully should be shaken uniformly, in detection faces, then spray uniform and thin developer, can not in the repeated multiple times applying in same place, during sprinkling, nozzle is 300～400mm from detection faces distance, and spraying direction with plane was seized angle is 30～40 °；Time of developing depends on developer kind, defect size and examined workpiece temperature, generally should less than 7 minutes；

5), defect mark trace is observed and evaluation；

5.1) observing display trace to carry out in 7～30 minutes after developer applies, the size such as display trace does not change, it is possible to exceed the above-mentioned time；

5.2) defect mark trace is observed and should be carried out under sufficient light, recognizes that 5～10 times of magnifieres of application are observed for tiny defect mark trace；

5.3) decapacitation determines that mark trace is due to outside misoperation causes, and other incisura trace shows and all processes as defect mark trace；

5.4) length-width ratio defect mark trace more than 3, processes by linear discontinuities, otherwise presses circular flaw and processes；

5.5), when the angle of defect mark trace long axis direction and axis of workpiece is more than or less than 30 °, process as transverse defect.