CN208334273U - A kind of long cylindrical work pieces leads to the magnetic powder inspection device of bar magnet - Google Patents
A kind of long cylindrical work pieces leads to the magnetic powder inspection device of bar magnet Download PDFInfo
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- CN208334273U CN208334273U CN201721805467.9U CN201721805467U CN208334273U CN 208334273 U CN208334273 U CN 208334273U CN 201721805467 U CN201721805467 U CN 201721805467U CN 208334273 U CN208334273 U CN 208334273U
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Abstract
The utility model discloses the magnetic powder inspection devices that a kind of long cylindrical work pieces leads to bar magnet, including magnetic conductive rod (11；12), the first logical magnetic coil (5), the second logical magnetic coil (6) and leading truck (2), the magnetic conductive rod (11；12) one end is provided with the leading truck (2), it is provided with directive wheel (21) on the leading truck (2), the first logical magnetic coil (5) and the second logical magnetic coil (6) cover in the magnetic conductive rod (11；12) on, the magnetic conductive rod (11；It 12) include at least two magnetic conductive poles, the connecting pin of adjacent magnetic conductive pole is cooperatively connected.The center magnetic conductive rod magnetic flaw apparatus structure of the long cylindrical work pieces of the utility model is simple, significantly improves the inner hole of long cylindrical work pieces forging, the Magnetic testing efficiency of outer wall and end face transverse defect.
Description
Technical field
The utility model relates to the magnetic powder inspection devices that a kind of long cylindrical work pieces leads to bar magnet.
Background technique
Magnetic powder inspection utilizes the interaction of magnetic flux leakage and magnetic powder at workpiece, defect and steel product surface and nearly table
The difference of planar defect (such as crackle folds, hairline etc.) magnetic conductivity and steel magnetic conductivity, by Magnitizing method, these materials do not connect
The magnetic field at continuous place can be distorted, and workpiece surface forms magnetic flux leakage, to attract magnetic powder fault location accumulation (generating magnetic trace).
Study the method for detection of the mobile magnetic particle flaw detector of long cylindrical work pieces, key technology be logical bar magnet coupling method and
Logical bar magnet is sent into workpiece mode, and the superiority and inferiority that logical bar magnet coupling method and logical bar magnet are sent into workpiece mode directly influences Magnetic testing
Accuracy, sensitivity and detection efficiency.Only after logical bar magnet coupling method and logical bar magnet feeding workpiece mode are selected, ability
Mechanical, electrical and control design is carried out according to institute's method for selecting, therefore, logical bar magnet coupling method is carried out and logical bar magnet is sent into work
The test of part mode and preferably just seem of crucial importance.At present, Magnitizing method used by domestic and international mobile magnetic particle flaw detector
Have: cable is straight direct current, alternating current；Cable winds direct current, alternating current；Cable intersects the methods of direct current, alternating current.But
When above method is used for the transverse defect magnetic powder inspection of long cylindrical forged piece inner hole surface, difficult, magnetization low efficiency that there is detection workpiece,
The disadvantages of technical requirements is not achieved in detection sensitivity.
Therefore, it is necessary to a kind of new magnetic flaw devices to solve the above problems.
Utility model content
The utility model is forged for the deficiency of the transverse defect magnetic powder inspection of forging inner hole surface in the prior art to meet
The requirement that the transverse defect of part inner hole surface is detected a flaw provides a kind of magnetic powder inspection device of logical bar magnet of long cylindrical work pieces.
In order to solve the above technical problems, a kind of long cylindrical work pieces of the utility model leads to the magnetic powder inspection device of bar magnet, packet
It includes magnetic conductive rod, the first logical magnetic coil, the second logical magnetic coil and leading truck, one end of the magnetic conductive rod and is provided with the leading truck,
Directive wheel is provided on the leading truck, the first logical magnetic coil and the second logical magnetic coil cover on the magnetic conductive rod, institute
Stating magnetic conductive rod includes at least two magnetic conductive poles, and the connecting pin of adjacent magnetic conductive pole is cooperatively connected.
Further, the connecting pin of adjacent magnetic conductive pole is correspondingly arranged.
Further, one end the upper side and lower side of adjacent magnetic conductive pole connecting pin is respectively arranged with the first protrusion and first recessed
Slot, other end the upper side and lower side are respectively arranged with convex with the described first raised and cooperation of the first groove the second groove and second
It rises.Fit system is simple and convenient, is easy installation.
Further, first protrusion and the first groove and second groove and the contact surface of the second protrusion are arranged
There is mutually matched striped.Make the contact area between adjacent magnetic conductive pole bigger using mutually matched striped, Magnetic testing
Accuracy and sensitivity it is higher.
Further, the contact surface of first protrusion and the first groove and second groove and the second protrusion is
Rough surface.The surface roughness of rough surface is Ra3.2 ± 0.2 in the utility model, can achieve higher magnetic powder inspection after tested
The accuracy and sensitivity of survey.
Further, the cross section of the magnetic conductive rod is fillet quadrangle.
Further, the conducting wire of the described first logical magnetic coil and the second logical magnetic coil is copper sheet.
Further, the width of the copper sheet is 40mm, with a thickness of 5mm.
Further, one end of the leading truck is snapped connection with the magnetic conductive rod.
Further, one end of the magnetic conductive rod is provided with convex grooves, and one end of the leading truck is provided with and institute
State the protrusion of convex grooves mating connection.Using convex grooves and matched protrusion, not only facilitate connection, but also connect effect
Fruit is more preferable.
It further, further include at least one support frame, support frame as described above includes that at least two struts, the strut is
Telescopic rod, the angle between the adjacent strut is less than 90 °, and one end of the strut is grounded, and the other end is directly connected to or leads to
Cross support device connection.Magnetic conductive rod is supported using angled strut is convenient, and support effect is preferable, facilitates tune
Section height.
Inventive principle: the center magnetic conductive rod method of detection of the mobile magnetic particle flaw detector of long cylindrical work pieces, key technology are
Logical bar magnet coupling method and logical bar magnet are sent into workpiece mode, and the superiority and inferiority for leading to bar magnet coupling method and logical bar magnet feeding workpiece mode is straight
Connect the accuracy, sensitivity and detection efficiency for influencing Magnetic testing.Only work is sent into logical bar magnet coupling method and logical bar magnet
After part mode is selected, mechanical, electrical and control design could be carried out according to institute's method for selecting, therefore, carry out logical bar magnet connection
Method and logical bar magnet are sent into the test of workpiece mode and preferably just seem of crucial importance.
The utility model has the advantages that the center magnetic conductive rod magnetic flaw apparatus structure of the long cylindrical work pieces of the utility model is simple, significantly
Improve the inner hole of long cylindrical work pieces forging, the Magnetic testing efficiency of outer wall and end face transverse defect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the magnetic conductive rod that the long cylindrical work pieces of the utility model leads to the magnetic powder inspection device of bar magnet；
Fig. 2 is the main view for the magnetic conductive pole one that the long cylindrical work pieces of the utility model leads to the magnetic powder inspection device of bar magnet；
Fig. 3 is the main view for the magnetic conductive pole one that the long cylindrical work pieces of the utility model leads to the magnetic powder inspection device of bar magnet；
Fig. 4 is the left view for the magnetic conductive rod that the long cylindrical work pieces of the utility model leads to the magnetic powder inspection device of bar magnet；
Fig. 5 is the perspective view for the leading truck that the long cylindrical work pieces of the utility model leads to the magnetic powder inspection device of bar magnet；
Fig. 6 is that the leading truck of the magnetic powder inspection device of the logical bar magnet of long cylindrical work pieces of the utility model is connect with magnetic conductive rod
Perspective view；
Fig. 7 is the main view for the logical magnetic coil that the long cylindrical work pieces of the utility model leads to the magnetic powder inspection device of bar magnet；
Fig. 8 is the left view for the logical magnetic coil that the long cylindrical work pieces of the utility model leads to the magnetic powder inspection device of bar magnet；
Fig. 9 is that tree head four-way cuts open in the embodiment two of the magnetic powder inspection device of the logical bar magnet of long cylindrical work pieces of the utility model
View；
Figure 10 is that the long cylindrical work pieces of the utility model leads to tree head four-way in the embodiment two of the magnetic powder inspection device of bar magnet
Cross-sectional view；
Figure 11 is that the long cylindrical work pieces of the utility model leads to tree head four in the embodiment two of the magnetic powder inspection device of bar magnet
Logical perspective view；
Figure 12 is that the long cylindrical work pieces of the utility model leads to tree head four in the embodiment two of the magnetic powder inspection device of bar magnet
Logical perspective view；
Figure 13 is that the long cylindrical work pieces of the utility model leads to round tube in the embodiment three of the magnetic powder inspection device of bar magnet
Cross-sectional view.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the utility model is furtherd elucidate, it should be understood that these embodiments are only used for
Illustrate the utility model rather than limitation the scope of the utility model, after having read the utility model, art technology
Personnel fall within the application range as defined in the appended claims to the modification of the various equivalent forms of the utility model.
It please refers to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8, the long cylindrical work pieces of the utility model leads to magnetic
The magnetic powder inspection device of stick, including magnetic conductive rod 11；12, the first logical magnetic coil 5, the second logical magnetic coil 6 and leading truck 2, magnetic conductive rod
11；12 one end is provided with leading truck 2, and directive wheel 21, the first logical magnetic coil 5 and the second logical magnetic coil 6 are provided on leading truck 2
It covers in magnetic conductive rod 11；On 12, magnetic conductive rod 11；12 include at least two magnetic conductive poles, and the connecting pin of adjacent magnetic conductive pole is cooperatively connected.
Wherein, the connecting pin of adjacent magnetic conductive pole is correspondingly arranged.
Specifically, one end the upper side and lower side of adjacent magnetic conductive pole connecting pin is respectively arranged with the first protrusion and the first groove,
Other end the upper side and lower side is respectively arranged with the second groove and the second protrusion with the first protrusion and the cooperation of the first groove.Cooperation side
Formula is simple and convenient, is easy installation.And utilize bolt 31；32 and nut 41；The connecting pin of 42 pairs of adjacent magnetic conductive rods is fixed.
Preferably, the contact surface of the first protrusion and the first groove and the second groove and the second protrusion is provided with mutually matched
Striped.Make the contact area between adjacent magnetic conductive pole bigger using mutually matched striped, the accuracy and spirit of Magnetic testing
Sensitivity is higher.Another way, the first protrusion and the first groove and the second groove and the contact surface of the second protrusion are rough surface.
The surface roughness of rough surface is Ra3.2 ± 0.2 in the utility model, can achieve the accurate of higher Magnetic testing after tested
Degree and sensitivity.
Wherein, magnetic conductive rod 11；12 cross section is fillet quadrangle.First logical magnetic coil 5 and the second logical magnetic coil 6 are led
Line is copper sheet.The width of copper sheet is 40mm, with a thickness of 5mm.
Preferably, one end of leading truck 2 and magnetic conductive rod 11；12 snap connection.Specifically, magnetic conductive rod 11；12 one end is set
Convex grooves are equipped with, one end of leading truck 2 is provided with the protrusion being cooperatively connected with convex grooves.Match using convex grooves and therewith
The protrusion of conjunction not only facilitates connection, but also connection effect is more preferable.
It further include at least one support frame, support frame includes at least two struts, and strut is telescopic rod, between adjacent struts
Angle less than 90 °, one end of strut is grounded, and the other end is directly connected to or by support device connection.Using at certain angle
The strut of degree is convenient to be supported magnetic conductive rod, and support effect is preferable, facilitates adjusting height.
Inventive principle: the center magnetic conductive rod method of detection of the mobile magnetic particle flaw detector of long cylindrical work pieces, key technology are
Logical bar magnet coupling method and logical bar magnet are sent into workpiece mode, and the superiority and inferiority for leading to bar magnet coupling method and logical bar magnet feeding workpiece mode is straight
Connect the accuracy, sensitivity and detection efficiency for influencing Magnetic testing.Only work is sent into logical bar magnet coupling method and logical bar magnet
After part mode is selected, mechanical, electrical and control design could be carried out according to institute's method for selecting, therefore, carry out logical bar magnet connection
Method and logical bar magnet are sent into the test of workpiece mode and preferably just seem of crucial importance.
The center magnetic conductive rod magnetic flaw apparatus structure of the long cylindrical work pieces of the utility model is simple, significantly improves long cylinder
The Magnetic testing efficiency of the inner hole of shape workpiece forging, outer wall and end face transverse defect.
Embodiment one
The length of magnetic conductive pole 1 is greater than 1500mm, and the length of magnetic conductive pole 2 12 is greater than 1500mm, and cross section is fillet four
Side shape is made of the compacting of material alloys steel disc.The coil turn of first logical magnetic coil 5 and the second logical magnetic coil 6 is 5, material
Material or plastics, are made by injection molding；Disk column arrangement, can wind.First logical magnetic coil 5 and the second logical magnetic coil
6 conducting wire is copper sheet, and the width of copper sheet is 40mm, with a thickness of 5mm.
Center magnetic conductive rod magnetic conduction method calculation formula: I=1.67D, I are bar magnet cable electrical current, and D is that inner hole of workpiece is straight
Diameter；Center bar magnet magnetic conduction method calculation formula error is 8%.
Embodiment two
Test equipment used: magnaflux, model C MD-6000；Gaussmeter, model 5100；The bar magnet of diameter phi 55.
It please refers to shown in Fig. 9, Figure 10, Figure 11 and Figure 12, workpiece title: tree head four-way；Material F22；Length 2711mm；It is interior
Bore dia 600mm；Overall diameter 705mm.
Magnetic testing defects detecting technology card request:
1. white light intensity is not more than 20Lx, ultraviolet ray intensity is not less than 1000 μ W/cm2.
2. magnetic flaw detection ink matched proportion density 0.5-3.0g/L, pyriform measure the precipitating concentration of pipe measurement magnetic flaw detection ink be 0.1~
0.4ml。
3. after pretreatment, with adhesive tape patch 30/100 μm of test piece of A1 type in workpiece surface.
4. longitudinal magnetization: inner hole circumferential defect need to be rotated once using logical magnetic coil method, workpiece.
5. it is 2250A that longitudinal magnetization, which adjusts electric current, and can clearly show test piece.
6. spraying magnetic flaw detection ink simultaneously and being magnetized, conduction time is 1-3 seconds, is spaced 0.5 second, and energization number is not less than 2
It is secondary.
7. immediately with ultraviolet lamp to all wetted surface is observed after magnetization, when observing inner hole, each 845mm in hole both ends
Within can directly observe, using endoscope carry out indirectly it is visual, detect less than 30 ° parts of inner hole surface and sight, according to interior hole depth
More than the principle that 3D (D is diameter of bore) cannot be observed directly, endoscopic observation inner hole surface is used when bore depth is more than 845mm
And record defect image.
8. recording the position of defect according to acceptance criteria and drawing the distribution schematic diagram of defect.
9. carrying out demagnetization processing according to 1.3 times of electrical current numerical value, remanent magnetism is not more than 3Gs.
Embodiment three
Test equipment used: magnaflux, model C MD-6000；Gaussmeter, model 5100；The bar magnet of diameter phi 55.
It please refers to shown in Figure 13, workpiece title: round tube；Material 4340；Length 2692mm；Diameter of bore 101mm；Overall diameter
152mm。
Magnetic testing defects detecting technology card request:
1. white light intensity is not more than 20Lx, ultraviolet ray intensity is not less than 1000 μ W/cm2。
2. magnetic flaw detection ink matched proportion density 0.5-3.0g/L, pyriform measure the precipitating concentration of pipe measurement magnetic flaw detection ink be 0.1~
0.4ml。
3. after pretreatment, with adhesive tape patch 30/100 μm of test piece of A1 type in workpiece surface.
4. longitudinal magnetization: inner hole circumferential defect need to be rotated once using logical magnetic coil method, workpiece.
5. it is 900A that longitudinal magnetization, which adjusts electric current, and can clearly show test piece.
6. spraying magnetic flaw detection ink simultaneously and being magnetized, conduction time is 1-3 seconds, is spaced 0.5 second, and energization number is not less than 2
It is secondary.
7. immediately with ultraviolet lamp to all wetted surface is observed after magnetization, when observing inner hole, each 175mm in hole both ends
Within can directly observe, using endoscope carry out indirectly it is visual, detect less than 30 ° parts of inner hole surface and sight, according to interior hole depth
More than the principle that 3D (D is diameter of bore) cannot be observed directly, endoscopic observation inner hole surface is used when bore depth is more than 175mm
And record defect image.
8. recording the position of defect according to acceptance criteria and drawing the distribution schematic diagram of defect.
9. carrying out demagnetization processing according to 1.3 times of electrical current numerical value, remanent magnetism is not more than 3Gs.
The utility model solves the mobile magnetic particle flaw detector longitudinal magnetization method of long cylindrical work pieces, substantially increases length
The capture rate of the inner hole of cylindrical work pieces, outer wall and end face transverse defect.Workpiece centre is placed with the bar magnet of φ 55, both ends are respectively put
It sets 5 circle coils to be powered, can disposably magnetize the workpiece within diameter of bore 700mm.Center bar magnet magnetic conduction method calculates public
Formula: I=1.67D, I are bar magnet cable electrical current, and D is inner hole of workpiece diameter.
Claims (10)
1. the magnetic powder inspection device that a kind of long cylindrical work pieces leads to bar magnet, which is characterized in that including magnetic conductive rod (11；12), first is logical
Magnetic coil (5), the second logical magnetic coil (6) and leading truck (2), the magnetic conductive rod (11；12) one end is provided with the leading truck
(2), it is provided with directive wheel (21) on the leading truck (2), the first logical magnetic coil (5) and the second logical magnetic coil (6) cover
In the magnetic conductive rod (11；12) on, the magnetic conductive rod (11；It 12) include at least two magnetic conductive poles, the connecting pin of adjacent magnetic conductive pole
It is cooperatively connected.
2. the magnetic powder inspection device that long cylindrical work pieces as described in claim 1 leads to bar magnet, which is characterized in that adjacent magnetic conductive pole connects
Connect end one end the upper side and lower side be respectively arranged with first protrusion and the first groove, other end the upper side and lower side be respectively arranged with
The second groove and the second protrusion of first protrusion and the cooperation of the first groove.
3. the magnetic powder inspection device that long cylindrical work pieces as claimed in claim 2 leads to bar magnet, which is characterized in that first protrusion
The contact surface of first groove and second groove and the second protrusion is provided with mutually matched striped.
4. the magnetic powder inspection device that long cylindrical work pieces as claimed in claim 2 leads to bar magnet, which is characterized in that first protrusion
Contact surface with the first groove and second groove and the second protrusion is rough surface.
5. the magnetic powder inspection device that long cylindrical work pieces as described in claim 1 leads to bar magnet, which is characterized in that the first logical magnetic
Coil (5) and the coil turn of the second logical magnetic coil (6) are 5.
6. the magnetic powder inspection device that long cylindrical work pieces as described in claim 1 leads to bar magnet, which is characterized in that the magnetic conductive rod
(11；12) cross section is fillet quadrangle.
7. the magnetic powder inspection device that long cylindrical work pieces as described in claim 1 leads to bar magnet, which is characterized in that the first logical magnetic
Coil (5) and the conducting wire of the second logical magnetic coil (6) are copper sheet.
8. the magnetic powder inspection device that long cylindrical work pieces as described in claim 1 leads to bar magnet, which is characterized in that the leading truck
(2) one end and the magnetic conductive rod (11；12) it snaps connection.
9. the magnetic powder inspection device that long cylindrical work pieces as claimed in claim 8 leads to bar magnet, which is characterized in that the magnetic conductive rod
(11；12) one end is provided with convex grooves, and one end of the leading truck (2) is provided with and convex grooves mating connection
Protrusion.
10. the magnetic powder inspection device that long cylindrical work pieces as described in claim 1 leads to bar magnet, which is characterized in that further include at least
One support frame, support frame as described above include at least two struts, and the strut is telescopic rod, the angle between the adjacent strut
Less than 90 °, one end of the strut is grounded, and the other end is directly connected to or is connected by support device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721805467.9U CN208334273U (en) | 2017-12-21 | 2017-12-21 | A kind of long cylindrical work pieces leads to the magnetic powder inspection device of bar magnet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721805467.9U CN208334273U (en) | 2017-12-21 | 2017-12-21 | A kind of long cylindrical work pieces leads to the magnetic powder inspection device of bar magnet |
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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 |
| CN114965677A (en) * | 2022-05-13 | 2022-08-30 | 南京迪威尔高端制造股份有限公司 | F-shaped magnetic flaw detection connecting clamp |
-
2017
- 2017-12-21 CN CN201721805467.9U patent/CN208334273U/en active Active
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 |
| CN114965677A (en) * | 2022-05-13 | 2022-08-30 | 南京迪威尔高端制造股份有限公司 | F-shaped magnetic flaw detection connecting clamp |
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