CN111912898B - Spiral compression spring electrification and magnetism dual-mode magnetic powder inspection device - Google Patents
Spiral compression spring electrification and magnetism dual-mode magnetic powder inspection device Download PDFInfo
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- CN111912898B CN111912898B CN202010706341.6A CN202010706341A CN111912898B CN 111912898 B CN111912898 B CN 111912898B CN 202010706341 A CN202010706341 A CN 202010706341A CN 111912898 B CN111912898 B CN 111912898B
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink
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Abstract
The invention relates to a spring flaw detection device. The utility model provides a helical compression spring circular telegram magnetic dual mode magnetic powder inspection device, includes the frame, is equipped with the spring shelf on the frame, installs electrode structure and magnet structure in the both ends of spring shelf, and electrode structure includes the electrode that is located the spring both sides of waiting to detect a flaw, and the electrode is connected with the electrode driving piece; the magnet structure comprises two magnetic poles which are arranged in pairs, and the magnetic poles are connected with a magnetic pole driving piece; and electrifying the electrodes or electrifying the magnetic poles sequentially, and carrying out flaw detection on the transverse direction and the longitudinal direction of the spring to be detected. The invention provides a coil compression spring electrification and magnetism dual-mode magnetic powder inspection device which can directly finish the omnidirectional inspection detection of the transverse direction and the longitudinal direction of a spring under the condition of not changing the clamping state in a clamping mode; the technical problems that the spring flaw detection structure is complex, and flaw detection is inconvenient for a heavy spring with a large size by inserting an electrified guide rod into the center are solved.
Description
Technical Field
The invention relates to a spring flaw detection device, in particular to a coil compression spring electrified and magnetized dual-mode magnetic powder flaw detection device.
Background
The coil compression spring, especially the heavy spring, the wire diameter of the spring is above 20 millimeters, its product characteristic is that the weight is great, in order to further realize the light weight of the spring, such as the building damper spring, heavy load and shake the spring, etc.; and in some engineering vehicles or sports machinery, such as bulldozers, excavator tensioning springs and the like, the working stress is higher and higher, and the reliability of products is also required to be higher and higher. These products all require non-destructive inspection.
The coil springs are usually directly electrified type magnetic powder inspection, such as China patent: a spring magnetic powder inspection method and device (CN 107632062A) comprises a frame, a pair of round copper plate electrodes, a round copper plate electrode insulating cushion layer, an electrode shaft insulating sleeve fixing handle, a screw rod support, a sliding rail and a magnetic suspension spraying device; the pair of copper plate electrode surfaces are parallel and are oppositely arranged on the pair of racks, one rack is arranged on the screw rod support or the two racks are respectively arranged on the two screw rod supports, the pair of copper plate electrode surfaces are on a straight line, the distance between the copper plate electrode surfaces covers the length of a spring to be detected, and the screw rod supports are meshed with the screw rod; the central hollow position of the spring workpiece, namely the central position of the electrode surface of the circular copper plate, is in a hole shape, and an electrode shaft perpendicular to the electrode surface of the circular copper plate is arranged in the hole and is mutually insulated with the electrode of the circular copper plate.
In direct-current magnetic particle inspection applications, a central current guide rod is required for circumferential cracks or defects of spring wires, such as those of Chinese patent: "a buffer spring flaw detector (CN 203011888U)", comprising a fixed base, a rotary support, a roller, a connecting shaft and a rotary motor; the two ends of the fixed seat are provided with supporting seats, the supporting seats are provided with fixing plates which are transversely arranged, a piston of a first cylinder on each fixing plate is connected with a movable plate, and one end of each movable plate is provided with a clamping electrode plate; a circumferential magnetic pole penetrating rod inserted into the buffer spring is arranged beside the moving plate, and the circumferential magnetic pole penetrating rod is arranged opposite to the moving plate and is respectively arranged in an insulating way with the clamping electrode plate; the clamping electrode plate and the two circumferential magnetic pole penetrating rods are connected with two poles of an external power supply, the end part of one circumferential magnetic pole penetrating rod is a convex cambered surface, the corresponding end of the other circumferential magnetic pole penetrating rod is a concave cambered surface, and the convex cambered surface is matched with the concave cambered surface. However, this detection method is very difficult for heavy springs, or springs with larger shape and size.
Disclosure of Invention
The invention provides a coil compression spring electrification and magnetism dual-mode magnetic powder inspection device which can directly finish the omnidirectional inspection detection of the transverse direction and the longitudinal direction of a spring under the condition of not changing the clamping state in a clamping mode; the spring flaw detection device solves the technical problems that the spring flaw detection structure in the prior art is complex, flaw detection of the spring is completed by changing different electrifying modes, and flaw detection is inconvenient for a heavy spring with a large size by inserting an electrifying guide rod into the center.
The technical problems of the invention are solved by the following technical scheme: the coil compression spring electrified and magnetic dual-mode magnetic powder inspection device comprises a rack, wherein a spring shelf is arranged on the rack, an electrode structure and a magnet structure are arranged at two ends of the spring shelf, the electrode structure comprises electrodes positioned at two sides of a spring to be inspected, and the electrodes are connected with electrode driving parts; the magnet structure comprises two magnetic poles which are arranged in pairs, and the magnetic poles are connected with a magnetic pole driving piece; and electrifying the electrodes or electrifying the magnetic poles sequentially, and carrying out flaw detection on the transverse direction and the longitudinal direction of the spring to be detected. In a clamping state, the electrodes on two sides of the spring to be detected are electrified to form a magnetic field, so that the crack of the spring wire in the circumferential direction is detected; and after the power is cut off, the magnetic pole structure magnetizes the spring to be detected, and the direction of the magnetic field generated by the electrode is different from that of the magnetic field generated by the electrode, so that the axial crack or defect of the spring wire is detected. The energizing and magnetizing are carried out in sequence in a clamping state, and magnetic fields in different directions are generated on the wire rod of the spring, so that the spring wire rod is subjected to all-dimensional flaw detection, the structure is simpler, the efficiency is high, and multiple clamping and installation are not needed. The magnetic fields in different directions are generated by electrifying and magnetizing, and the two test modes are used for respectively detecting cracks in different directions, so that the magnetic fields generated in the two modes are not influenced mutually when the magnet is electrified or magnetized, the high precision of the test is improved, and the possibility of generating electric sparks is reduced. Instead of using the charging mode in the prior art, but using the different charging modes to complete the arrangement of different magnetic fields, the central guide post needs to be insulated when being electrified, so that the central guide post is prevented from being influenced by the through electrodes on two sides, has a complex structure, and is easy to generate an electric arc.
Preferably, the electrode is a copper electrode, the contact surface of the electrode, which is connected with the end surface of the spring to be detected, is a plane, and the area of the contact surface of the electrode is larger than the outer diameter of the end surface of the spring to be detected. The plane contact ensures the electrifying stability, and the copper electrode can effectively prevent magnetization in the magnetizing process, thereby influencing the flaw detection of the spring wire in the other direction.
Preferably, the electrode is provided with a through hole, a magnetic pole positioning sleeve is arranged on the electrode, a magnetic pole is inserted into the magnetic pole positioning sleeve, and the magnetic pole can pass through the through hole on the electrode to be connected with the spring to be detected. The magnetic pole locating sleeve is welded on the electrode, so that the installation of the magnetic pole is facilitated, meanwhile, the movement of the magnetic pole is facilitated, and when the spring is magnetized, the magnetic pole is inserted along the magnetic pole locating sleeve, and the end face of the magnetic pole is connected with the end face of the spring.
Preferably, the electrode driving piece is a driving motor, the output end of the driving motor is connected with the sleeve through the screw rod, and the sleeve is connected with the electrode through the insulating rod. The movement of the sleeve drives the electrode to move towards the two ends of the spring, the spring is clamped, and then the current is supplied, so that the flaw detection of the spring wire in the circumferential direction is completed.
Preferably, the magnetic pole driving piece comprises a driving cylinder, the cylinder is fixed on the frame, and the cylinder shaft is abutted on the magnetic pole. In the magnetic flux mode, the magnetic pole is abutted on the end face of the spring to be detected through the cylinder structure, so that the spring to be detected is magnetized, and the spring is subjected to the detection in the axial direction.
Therefore, the coil compression spring energized magnetic dual-mode magnetic powder inspection device has the following advantages: the structure is simple, only needs to be clamped and installed once, a mobile control contact direct electrifying mode is adopted successively, then the electrifying mode is stopped, and the magnetic pole contact is moved, so that the magnetic pole connecting spring implements the electrifying mode, and the detection of all-dimensional cracks and other defects on the surface of the spring is ensured.
Drawings
Fig. 1 is a schematic diagram of a coil compression spring energized magnetic dual mode magnetic particle inspection device.
Fig. 2 is a schematic diagram of the positional arrangement of the springs, motor and poles to be inspected.
Fig. 3 is a perspective view of the connection of the electrodes and poles in fig. 1.
Detailed Description
The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings.
Examples:
as shown in fig. 1, 2 and 3, the coil compression spring energized magnetic dual-mode magnetic powder inspection device comprises a frame 1, a V-shaped spring shelf 8 is arranged on the frame 1, and a spring 7 to be inspected is arranged on the spring shelf 8. An electrode structure and a magnet structure are respectively arranged at two ends of the spring shelf 8.
The electrode structure comprises two disc-shaped copper electrodes 6, and the diameter of each disc-shaped copper electrode 6 is larger than the outer diameter of the cross section of the spring 7 to be detected. A through hole 13 is provided in the center of the electrode 6. One end face of the electrode 6 is connected with the end face of the spring 7 to be detected, the other end face of the electrode 6 is welded with a magnetic pole positioning sleeve 5, the magnetic pole positioning sleeve 5 is provided with a magnetic pole positioning hole corresponding to the through hole 13, and the magnetic pole positioning hole is in transition fit with the magnetic pole 4. The electrode 6 is connected with a sleeve 10 through an insulating rod 9, the sleeve 10 is sleeved on a screw rod 11, the screw rod 11 is connected with the output end of a driving motor 12, and the driving motor drives the screw rod 11 to rotate, so that the electrode 6 is driven to move, and two ends of the electrode 6 are connected with two ends of a spring to be detected, so that the electrified flaw detection is completed.
The magnetic pole structure comprises two square silicon magnetic poles 4, the silicon magnetic poles 4 are inserted into a magnetic pole positioning sleeve 5, the rear sides of the silicon magnetic poles 4 are connected with a cylinder shaft 3 through a connecting plate, the other end of the cylinder shaft 3 is installed in a cylinder 2, and the cylinder 2 is fixed on a frame 1.
When flaw detection is carried out, the spring to be detected is placed on the spring shelf, and then the driving motor is started, so that electrodes at two ends of the spring to be detected approach the spring to be detected until the electrodes are contacted. And then electrifying the electrode to finish circumferential flaw detection of the spring wire to be detected. And then the power supply is turned off, the air cylinder is driven, the air cylinder shaft pushes the silicon magnetic pole to pass through the through hole until the silicon magnetic pole contacts with the end face of the spring to be inspected, and magnetization is carried out, so that the inspection of the spring wire in the axial direction is completed.
Claims (5)
1. The utility model provides a helical compression spring circular telegram magnetism dual mode magnetic particle inspection device, includes the frame, is equipped with spring rack, its characterized in that in the frame: the two ends of the spring shelf are provided with an electrode structure and a magnet structure, the electrode structure comprises electrodes positioned at two sides of the spring to be detected, and the electrodes are connected with an electrode driving piece; the magnet structure comprises two magnetic poles which are arranged in pairs, and the magnetic poles are connected with a magnetic pole driving piece; electrifying an electrode or electrifying a magnetic pole sequentially, and carrying out flaw detection on the transverse direction and the longitudinal direction of the spring to be detected; when flaw detection is carried out, firstly placing a spring to be detected on a spring shelf, and then starting a driving motor to enable electrodes at two ends of the spring to be detected to approach the spring to be detected until the electrodes are contacted; then electrifying the electrode to finish circumferential flaw detection of the spring wire to be detected; and then the power supply is turned off, the magnetic pole is driven until the magnetic pole contacts with the end face of the spring to be detected, and magnetization is carried out, so that the detection of the spring wire in the axial direction is completed.
2. The coil compression spring energized magnetic dual-mode magnetic particle inspection device according to claim 1, wherein: the electrode is a copper electrode, the contact surface of the electrode connected with the end surface of the spring to be detected is a plane, and the area of the contact surface of the electrode is larger than the outer diameter of the end surface of the spring to be detected.
3. The coil compression spring energized magnetic dual-mode magnetic particle inspection device according to claim 1 or 2, characterized in that: the electrode is provided with a through hole, a magnetic pole positioning sleeve is arranged on the electrode, a magnetic pole is inserted into the magnetic pole positioning sleeve, and the magnetic pole can pass through the through hole on the electrode to be connected with a spring to be detected.
4. The coil compression spring energized magnetic dual-mode magnetic particle inspection device according to claim 1 or 2, characterized in that: the electrode driving piece is a driving motor, the output end of the driving motor is connected with the sleeve through the screw rod, and the sleeve is connected with the electrode through the insulating rod.
5. The coil compression spring energized magnetic dual-mode magnetic particle inspection device according to claim 1 or 2, characterized in that: the magnetic pole driving piece comprises a driving air cylinder, the air cylinder is fixed on the frame, and an air cylinder shaft is abutted on the magnetic pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010706341.6A CN111912898B (en) | 2020-07-21 | 2020-07-21 | Spiral compression spring electrification and magnetism dual-mode magnetic powder inspection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010706341.6A CN111912898B (en) | 2020-07-21 | 2020-07-21 | Spiral compression spring electrification and magnetism dual-mode magnetic powder inspection device |
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| Publication Number | Publication Date |
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| CN111912898A CN111912898A (en) | 2020-11-10 |
| CN111912898B true CN111912898B (en) | 2023-06-16 |
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Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB711521A (en) * | 1952-04-02 | 1954-07-07 | Vickers Electrical Co Ltd | Improvements relating to magnetic crack-detecting apparatus |
| JP2545385B2 (en) * | 1987-03-09 | 1996-10-16 | バブコツク日立株式会社 | Magnetic particle flaw detector |
| CN201402254Y (en) * | 2009-04-28 | 2010-02-10 | 湖南长沙湘仪检测设备有限公司 | Multi-electrode magnetic particle inspection machine |
| CN103018322B (en) * | 2012-12-11 | 2015-10-14 | 南车长江车辆有限公司 | Buffer spring failure detector |
| CN202974947U (en) * | 2012-12-20 | 2013-06-05 | 江苏赛福探伤设备制造有限公司 | Magnetic powder flaw detection magnetization device for bearing rollers |
| CN104330463A (en) * | 2013-07-22 | 2015-02-04 | 李俊生 | Four-way magnetizing magnetic powder inspection apparatus |
| CN205449884U (en) * | 2015-12-28 | 2016-08-10 | 中原特钢股份有限公司 | A portable pipe end magnetization unit for magnetic particle inspection |
| CN205691544U (en) * | 2016-04-20 | 2016-11-16 | 江苏省迅达探伤科技有限公司 | A kind of magnaflux |
| CN207232076U (en) * | 2017-09-22 | 2018-04-13 | 江苏中凯探伤设备制造有限公司 | A kind of spring magnetic powder inspection electrode |
| CN207232077U (en) * | 2017-09-22 | 2018-04-13 | 江苏中凯探伤设备制造有限公司 | A kind of box cupling fluorescent magnetic particle inspection machine |
| CN107632062A (en) * | 2017-09-22 | 2018-01-26 | 江苏中凯探伤设备制造有限公司 | A kind of spring magnetic powder inspection method and apparatus |
| CN107561155A (en) * | 2017-09-26 | 2018-01-09 | 王枫 | Special-shaped coils wheel is to magnetic powder inspection device |
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- 2020-07-21 CN CN202010706341.6A patent/CN111912898B/en active Active
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