CN108613994A - The method for measuring bearing device welding point deep hole defect using photographic density - Google Patents
The method for measuring bearing device welding point deep hole defect using photographic density Download PDFInfo
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- CN108613994A CN108613994A CN201810493169.3A CN201810493169A CN108613994A CN 108613994 A CN108613994 A CN 108613994A CN 201810493169 A CN201810493169 A CN 201810493169A CN 108613994 A CN108613994 A CN 108613994A
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- bearing device
- deep hole
- hole
- welding point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses a kind of methods measuring bearing device welding point deep hole defect using photographic density, selection and the steel plate of the steel plate same material same specification of bearing device make simulating test pieces, on the face of simulating test pieces, several holes are set by the spacing g of setting along same straight line, hole depth is successively decreased successively.It selects ray detector transillumination simulating test pieces to make egative film, measures the photographic density of corresponding aperture depths, make photographic density hole depth curve.Corresponding photographic density hole depth curve determines the depth in the hole for being tested welding point, differentiate hole depth whether be more than deep hole defect boundary value, it whether there is deep hole defect the method for the present invention to which judgement is tested bearing device welding point, define the boundary value of deep hole defect, by designing and producing specialized simulation test block, solve the problems, such as the measurement of deep hole depth, can effectively, easily determine deep hole defect, a kind of effective ways can be provided for bearing device welding point quantitative measurment.
Description
Technical field
The present invention relates to a kind of methods measuring bearing device welding point deep hole defect using photographic density, belong to pressure-bearing
Equipment field of non destructive testing.
Background technology
Bearing device ray detection correlation standard：" welding point high to consistency requirements, manufactory's egative film evaluation
Personnel are considered as using the blackness of circular flaw as the foundation of grading.It is usually that image blackness is big, weld seam compactness may be influenced
Circular flaw be defined as deep hole defect, when welding point is there are when deep hole defect, quality scale should be chosen as IV grade." standard
Since implementation, welding point deep hole defect has obtained preferable control, ensure that bearing device quality safety.But it has also been found that some
Problem, due to the method that standard does not provide quantitative judgement and the measurement of deep hole defect, it is difficult to hold ruler to lead to egative film evaluating member
Degree, it is difficult to effectively define deep hole defect.
Invention content
It is an object of the present invention to overcome defect of the existing technology, a kind of utilization photographic density measurement pressure-bearing is provided
The method of equipment welding point deep hole defect effectively can easily solve the measurement of bearing device welding point deep hole defect and sentence
It is fixed.
In order to achieve the above purpose, the technical solution adopted by the present invention is as follows：
Step 1. selects to make simulating test pieces, the thickness and pressure-bearing of simulating test pieces with the steel plate of the steel plate same material of bearing device
The steel plate thickness of equipment is identical, and if weld reinforcement does not polish, the thickness T of simulating test pieces should add weld reinforcement, therefore, simulation examination
The thickness T of block is the sum of steel plate thickness and weld reinforcement of bearing device；On the face of simulating test pieces, along same straight line every setting
Fixed spacing g is arranged a hole, a diameter of d in hole, the distance of the bottom surface of the bottom away from simulating test pieces in hole according to setting gradient
Value k is incremented by successively, therefore the thickness T of simulating test pieces determines the length L of simulating test pieces.
Step 2. selects ray detector transillumination simulating test pieces, the film after transillumination to form egative film after darkroom disposal.
Step 3. measures the photographic density of corresponding aperture depths, records corresponding photographic density numerical value, makes photographic density-hole
Depth curve.
Technology in bearing device design drawing is required defined minimum allowable thickness as the side of deep hole defect by step 4.
Dividing value.
During step 5. is actually detected, the photographic density for being tested bearing device welding point, corresponding photographic density-hole depth are surveyed
Line of writing music determines the depth in hole, differentiate hole depth whether be more than deep hole defect boundary value；
If the depth in hole is more than the boundary value of deep hole defect, judge to be tested bearing device welding point there are deep hole defect,
Quality scale is chosen as IV grade, carries out Repair；
If the depth in hole is less than the boundary value of deep hole defect, there is no deep holes to lack for the welding point of the tested bearing device of judgement
It falls into.
The method of the present invention defines the boundary value of deep hole defect, by designing and producing specialized simulation test block, solves deep hole
The measurement problem of depth, can effectively, easily determine deep hole defect, one kind can be provided for bearing device welding point quantitative measurment
Effective ways.
Description of the drawings
Fig. 1 is that the present invention utilizes simulating test pieces in the method for photographic density measurement bearing device welding point deep hole defect
Schematic top plan view.
Fig. 2 is that the present invention utilizes simulating test pieces in the method for photographic density measurement bearing device welding point deep hole defect
Schematic side view.
Fig. 3 is the photographic density-hole depth curve drawn using the method for the present invention.
Specific implementation mode
With reference to the accompanying drawings and examples, the method for the present invention is described in further detail.
Known one bearing device plate thickness is 30mm, material Q345R, Lincoln weld welding, postwelding weld reinforcement
It polishes, requires not allowing deep hole defect (minimum allowable wall thickness 25mm) according to standard.Specific implementation step is as follows：
1, according to the steel plate thickness of bearing device（Weld reinforcement polishes）, select the steel plate of same material to make simulating test pieces, specifically
Size See Figure（The depth in hole can be considered according to measurement accuracy）：
2, according to standard and unit steps requirement, the ray detection machine of XXQ-3005 types is selected（Design parameter：700 millimeters of focal length,
240 kilovolts of tube voltage, 5 milliamperes, film AGFAC7 of tube current, 0.03 millimeter before and after intensifying screen.）, transillumination simulating test pieces, after transillumination
Film through darkroom disposal（Design parameter：20 degrees Celsius of room temperature, DS-2 cover medicine, develop 5 minutes, are fixed 10 minutes, rinse 20 points
Clock.）After form egative film.
3, using the photographic density of TD-210 black and white densimeter measurement corresponding apertures depths, corresponding numerical value is recorded, is made：Bottom
Piece blackness-hole depth curve.
4, according to corresponding data is measured, photographic density-hole depth curve is made.
5, defined side of the minimum allowable thickness as the defect of deep hole is required according to technology in bearing device design drawing
Boundary, it is deep hole defect to be more than.This TV station bearing device requires not allowing 5mm deep holes defect (minimum allowable wall according to drawing technology
Thick 25mm).
6, in the actually detected bearing device weld seam, find there is the round stomata that image blackness is larger at one to lack in egative film
It falls into, using TD-210 black and white densimeter measurement, the defect blackness is 2.10, and homologous thread determines that the deep 5.2mm in hole is more than 5mm, sentences
It is deep hole defect to be set to, and quality scale should be chosen as IV grade, carries out Repair.
Claims (1)
1. a kind of method measuring bearing device welding point deep hole defect using photographic density, its step are as follows：
Step 1. selects to make simulating test pieces with the steel plate of the steel plate same material of bearing device, and the thickness T of simulating test pieces is pressure-bearing
The sum of steel plate thickness and weld reinforcement of equipment；It is several by the spacing g settings of setting along same straight line on the face of simulating test pieces
The distance in a hole, a diameter of d in hole, the bottom surface of the bottom away from simulating test pieces in hole is incremented by successively according to the Grad k of setting；
Step 2. selects ray detector transillumination simulating test pieces, the film after transillumination to form egative film after darkroom disposal；
Step 3. measures the photographic density of corresponding aperture depths, records corresponding photographic density numerical value, makes photographic density-hole depth
Curve；
Technology in bearing device design drawing is required defined minimum allowable thickness as the boundary value of deep hole defect by step 4.；
During step 5. is actually detected, the photographic density for being tested bearing device welding point is surveyed, corresponding photographic density-hole depth is write music
Line determines the depth in hole, differentiate hole depth whether be more than deep hole defect boundary value；
If the depth in hole is more than the boundary value of deep hole defect, the welding point for being tested bearing device is judged there are deep hole defect,
Its quality scale is chosen as IV grade, carries out Repair；
If the depth in hole is less than the boundary value of deep hole defect, there is no deep holes to lack for the welding point of the tested bearing device of judgement
It falls into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810493169.3A CN108613994A (en) | 2018-05-22 | 2018-05-22 | The method for measuring bearing device welding point deep hole defect using photographic density |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810493169.3A CN108613994A (en) | 2018-05-22 | 2018-05-22 | The method for measuring bearing device welding point deep hole defect using photographic density |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108613994A true CN108613994A (en) | 2018-10-02 |
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| CN201810493169.3A Pending CN108613994A (en) | 2018-05-22 | 2018-05-22 | The method for measuring bearing device welding point deep hole defect using photographic density |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608139A (en) * | 2012-03-04 | 2012-07-25 | 茂名重力石化机械制造有限公司 | Radiographic detection method for welding joint of outer tube sleeved with inner tube |
| CN103149223A (en) * | 2011-12-06 | 2013-06-12 | 上海宝钢工业检测公司 | RT quantitative detection method for corroded holes of multilayered cylinder |
| CN103471535A (en) * | 2013-09-06 | 2013-12-25 | 航天材料及工艺研究所 | Method using photographic density value to measure homogeneous material thickness |
| CN103792243A (en) * | 2014-02-25 | 2014-05-14 | 台州市中奥特种设备检测技术服务有限公司 | Radiographic inspection method for incomplete penetration depth of welded junction of small-diameter tube |
| CN205449833U (en) * | 2015-08-03 | 2016-08-10 | 赵建江 | Accurate detectable material's of digit ray transillumination technique defect and device of thickness |
| JP2017219317A (en) * | 2016-06-02 | 2017-12-14 | 新日鐵住金株式会社 | Inspection method for peripheral weld zone |
-
2018
- 2018-05-22 CN CN201810493169.3A patent/CN108613994A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149223A (en) * | 2011-12-06 | 2013-06-12 | 上海宝钢工业检测公司 | RT quantitative detection method for corroded holes of multilayered cylinder |
| CN102608139A (en) * | 2012-03-04 | 2012-07-25 | 茂名重力石化机械制造有限公司 | Radiographic detection method for welding joint of outer tube sleeved with inner tube |
| CN103471535A (en) * | 2013-09-06 | 2013-12-25 | 航天材料及工艺研究所 | Method using photographic density value to measure homogeneous material thickness |
| CN103792243A (en) * | 2014-02-25 | 2014-05-14 | 台州市中奥特种设备检测技术服务有限公司 | Radiographic inspection method for incomplete penetration depth of welded junction of small-diameter tube |
| CN205449833U (en) * | 2015-08-03 | 2016-08-10 | 赵建江 | Accurate detectable material's of digit ray transillumination technique defect and device of thickness |
| JP2017219317A (en) * | 2016-06-02 | 2017-12-14 | 新日鐵住金株式会社 | Inspection method for peripheral weld zone |
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