CN204330678U - A kind of central guiding bar magnet magnetic flaw device of hollow workpiece - Google Patents
A kind of central guiding bar magnet magnetic flaw device of hollow workpiece Download PDFInfo
- Publication number
- CN204330678U CN204330678U CN201420202722.0U CN201420202722U CN204330678U CN 204330678 U CN204330678 U CN 204330678U CN 201420202722 U CN201420202722 U CN 201420202722U CN 204330678 U CN204330678 U CN 204330678U
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- magnetic
- bar magnet
- logical
- magnetic coil
- hollow workpiece
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- Expired - Lifetime
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 238000012360 testing method Methods 0.000 abstract description 10
- 230000007547 defect Effects 0.000 abstract description 8
- 238000005242 forging Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 37
- 238000001514 detection method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000006249 magnetic particle Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 239000006247 magnetic powder Substances 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model discloses a kind of central guiding bar magnet magnetic flaw device of hollow workpiece, comprise magnetic conductive rod (1), the first logical magnetic coil (2) and the second logical magnetic coil (3), the middle part of the first logical magnetic coil (2) and the second logical magnetic coil (3) all has through hole, first logical magnetic coil (2) and the second logical magnetic coil (3) are all enclosed within magnetic conductive rod (1), and magnetic conductive rod (1) is through hollow workpiece.The central guiding bar magnet magnetic flaw apparatus structure of hollow workpiece of the present utility model is simple, significantly improves the Magnetic testing efficiency of the endoporus of hollow forging, outer wall and end face transverse defect.
Description
Technical field
The utility model relates to a kind of central guiding bar magnet magnetic flaw device of hollow workpiece.
Background technology
Magnetic powder inspection utilizes the stray field at workpiece, defect place and the interaction of magnetic, and steel product surface and near surface flaw (as crackle, folding, hairline etc.) difference of magnetic permeability and iron and steel magnetic permeability, pass through Magnitizing method, can distort in the magnetic field at these material discontinuity places, surface of the work defines stray field, thus attract magnetic to pile up (producing magnetic trace) at fault location.
The method of detection of research mobile magnetic particle flaw detector, gordian technique is choosing of Magnitizing method, and the quality of Magnitizing method directly has influence on the accuracy of Magnetic testing, sensitivity and detection efficiency.Only after Magnitizing method is selected, machinery could be carried out, electrically and the design controlled, therefore, carry out the test of Magnitizing method and preferably just seem of crucial importance according to institute's method for selecting.At present, the Magnitizing method that domestic and international mobile magnetic particle flaw detector adopts has: cable is straight direct current, alternating current; Cable winds direct current, alternating current; Method such as cable intersection direct current, alternating current etc.But when above method is used for the transverse defect magnetic powder inspection of forging inner hole surface, also exists respectively and detect the shortcomings such as Workpiece structure is simple, magnetization efficiency is low, detection sensitivity is low.
Therefore, need a kind of new magnetic flaw device to solve the problem.
Utility model content
Utility model object: the utility model for the deficiency of the transverse defect magnetic powder inspection of forging inner hole surface of the prior art, provide a kind of can to the central guiding bar magnet magnetic flaw device of the hollow workpiece that the transverse defect of forging inner hole surface is detected a flaw.
Technical scheme: for solving the problems of the technologies described above, the central guiding bar magnet magnetic flaw device of hollow workpiece of the present utility model adopts following technical scheme:
A kind of central guiding bar magnet magnetic flaw device of hollow workpiece, comprise magnetic conductive rod, the first logical magnetic coil and the second logical magnetic coil, the middle part of the described first logical magnetic coil and the second logical magnetic coil all has through hole, described first logical magnetic coil and the second logical magnetic coil are all enclosed within described magnetic conductive rod, and described magnetic conductive rod is through hollow workpiece.
Further, the described first logical magnetic coil and the second logical magnetic coil be 3 circle coils.Because the wire needed in logical magnetic coil is relatively thicker, if the number of turn will cause logical magnetic coil too heavy too much, design makes the first logical magnetic coil and the second weight of leading to magnetic coil can not be too heavy like this, also can produce enough magnetic flux.
Further, the xsect of described magnetic conductive rod is regular hexagon.The convenient rotation controlling magnetic conductive rod.
Further, the wire of the described first logical magnetic coil and the second logical magnetic coil is copper coin.The electric current that can pass through is larger.
Further, the width of described copper coin is 40mm, and thickness is 5mm.
Further, also comprise support, described magnetic conductive rod is arranged on the bracket, and described Bracket setting is in the both sides of hollow workpiece.
Inventive principle: the central guiding bar magnet method of detection of mobile magnetic particle flaw detector, gordian technique is choosing of Magnitizing method, and the quality of Magnitizing method directly has influence on the accuracy of Magnetic testing, sensitivity and detection efficiency.Only after Magnitizing method is selected, machinery could be carried out, electrically and the design controlled, therefore, carry out the test of center bar magnet magnetic conduction method Magnitizing method and preferably just seem of crucial importance according to institute's method for selecting.Center bar magnet magnetic conduction method computing formula error is 8%.
Beneficial effect: the central guiding bar magnet magnetic flaw apparatus structure of hollow workpiece of the present utility model is simple, significantly improves the Magnetic testing efficiency of the endoporus of hollow forging, outer wall and end face transverse defect.
Accompanying drawing explanation
Fig. 1 is the front view of the bar magnet of the central guiding bar magnet magnetic flaw method of the utility model hollow workpiece;
Fig. 2 is the left view of the bar magnet of the central guiding bar magnet magnetic flaw method of the utility model hollow workpiece;
Fig. 3 is the front view of the logical magnetic coil of the central guiding bar magnet magnetic flaw method of the utility model hollow workpiece;
Fig. 4 is the left view of the logical magnetic coil of the central guiding bar magnet magnetic flaw method of the utility model hollow workpiece;
The structural representation of Fig. 5 to be diameter of bore be 152mm workpiece;
The structural representation of Fig. 6 to be diameter of bore be 260mm workpiece;
The structural representation of Fig. 7 to be diameter of bore be 343mm workpiece.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
Refer to shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the central guiding bar magnet magnetic flaw device of hollow workpiece of the present utility model, comprise magnetic conductive rod, the first logical magnetic coil and the second logical magnetic coil, the middle part of the first logical magnetic coil and the second logical magnetic coil all has through hole, first logical magnetic coil and the second logical magnetic coil are all enclosed within magnetic conductive rod, and magnetic conductive rod is through hollow workpiece.Wherein, the first logical magnetic coil and the second logical magnetic coil be 3 circle coils.The xsect of magnetic conductive rod is regular hexagon.The wire of the first logical magnetic coil and the second logical magnetic coil is copper coin.The width of copper coin is 40mm, and thickness is 5mm.Also comprise support, magnetic conductive rod is arranged on support, and Bracket setting is in the both sides of hollow workpiece.
Bar magnet material is iron Si system alloy steel disc compacting composition; Logical magnetic coil material is rubber or plastics, makes through injection moulding; Every only built-in 3 circle coils of logical magnetic coil, coil disk row are arranged, also can be entwined.Coil is made by copper coin, and it is thick that copper coin is of a size of 5mm, and 40mm is wide.
Central guiding bar magnet magnetic conduction method computing formula: I=1.67D, I are bar magnet cable electrical current, and D is inner hole of workpiece diameter; Center bar magnet magnetic conduction method computing formula error is 8%.
Embodiment 1
Be similar to 2400A/m by controlling magnetic field intensity constant, measure the endoporus of endoporus 152mm, 260mm, 343mm tri-workpiece, end face, the corresponding current value of cylindrical respectively, correlation data, checks the magnetic property of bar magnet.
Test equipment used: magnaflux, model C MD-6000; Gaussmeter, model 5100; The bar magnet of diameter phi 50; Diameter of bore is each one of the workpiece of 152mm, 260mm, 343mm.
Refer to shown in Fig. 5, material 4130 diameter of bore 152mm.
Refer to shown in Fig. 6, material 4130 diameter of bore 260mm
Refer to shown in Fig. 7, material 4130 diameter of bore 343mm
The utility model solves mobile magnetic particle flaw detector longitudinal magnetization method, substantially increases the capture rate of the endoporus of tubular or hole pattern members, outer wall and end face transverse defect.With the bar magnet place work piece center of φ 50, two ends are respectively placed 3 circle coils and are energized, can workpiece within disposable magnetization diameter of bore 500mm.Center bar magnet magnetic conduction method computing formula: I=1.67D, I are bar magnet cable electrical current, and D is inner hole of workpiece diameter.
Inventive principle: the central guiding bar magnet method of detection of mobile magnetic particle flaw detector, gordian technique is choosing of Magnitizing method, and the quality of Magnitizing method directly has influence on the accuracy of Magnetic testing, sensitivity and detection efficiency.Only after Magnitizing method is selected, machinery could be carried out, electrically and the design controlled, therefore, carry out the test of center bar magnet magnetic conduction method Magnitizing method and preferably just seem of crucial importance according to institute's method for selecting.Center bar magnet magnetic conduction method computing formula error is 8%.
The central guiding bar magnet magnetic flaw apparatus structure of hollow workpiece of the present utility model is simple, significantly improves the Magnetic testing efficiency of the endoporus of hollow forging, outer wall and end face transverse defect.
Claims (6)
1. the central guiding bar magnet magnetic flaw device of a hollow workpiece, it is characterized in that, comprise magnetic conductive rod, the first logical magnetic coil and the second logical magnetic coil, the middle part of the described first logical magnetic coil and the second logical magnetic coil all has through hole, described first logical magnetic coil and the second logical magnetic coil are all enclosed within described magnetic conductive rod, and described magnetic conductive rod is through hollow workpiece.
2. the central guiding bar magnet magnetic flaw device of hollow workpiece as claimed in claim 1, is characterized in that, the described first logical magnetic coil and the second logical magnetic coil be 3 circle coils.
3. the central guiding bar magnet magnetic flaw device of hollow workpiece as claimed in claim 1, it is characterized in that, the xsect of described magnetic conductive rod is regular hexagon.
4. the central guiding bar magnet magnetic flaw device of hollow workpiece as claimed in claim 1, is characterized in that, the wire of the described first logical magnetic coil and the second logical magnetic coil is copper coin.
5. the central guiding bar magnet magnetic flaw device of hollow workpiece as claimed in claim 4, it is characterized in that, the width of described copper coin is 40mm, and thickness is 5mm.
6. the central guiding bar magnet magnetic flaw device of hollow workpiece as claimed in claim 1, is characterized in that, also comprise support, and described magnetic conductive rod is arranged on the bracket, and described Bracket setting is in the both sides of hollow workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420202722.0U CN204330678U (en) | 2014-04-23 | 2014-04-23 | A kind of central guiding bar magnet magnetic flaw device of hollow workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420202722.0U CN204330678U (en) | 2014-04-23 | 2014-04-23 | A kind of central guiding bar magnet magnetic flaw device of hollow workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204330678U true CN204330678U (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420202722.0U Expired - Lifetime CN204330678U (en) | 2014-04-23 | 2014-04-23 | A kind of central guiding bar magnet magnetic flaw device of hollow workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204330678U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666247A (en) * | 2020-12-18 | 2021-04-16 | 南京迪威尔高端制造股份有限公司 | Magnetic powder detection device and method for circumferential defects of inner wall and outer wall of ferromagnetic product hole |
| CN113533494A (en) * | 2021-08-04 | 2021-10-22 | 南京迪威尔高端制造股份有限公司 | Magnetic flaw detection device for annular workpiece |
-
2014
- 2014-04-23 CN CN201420202722.0U patent/CN204330678U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666247A (en) * | 2020-12-18 | 2021-04-16 | 南京迪威尔高端制造股份有限公司 | Magnetic powder detection device and method for circumferential defects of inner wall and outer wall of ferromagnetic product hole |
| CN113533494A (en) * | 2021-08-04 | 2021-10-22 | 南京迪威尔高端制造股份有限公司 | Magnetic flaw detection device for annular workpiece |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Changhua Inventor after: Zhang Li Inventor before: Zhang Li Inventor before: Chen Changhua |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHANG LI CHEN CHANGHUA TO: CHEN CHANGHUA ZHANG LI |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150513 |