SU947633A1

SU947633A1 - Magnetic method of measuring coatings and device for employing thereof

Info

Publication number: SU947633A1
Application number: SU813229760A
Authority: SU
Inventors: Валерий Аркадьевич Рудницкий; Андрей Львович Мелешко
Original assignee: Институт Прикладной Физики Ан Бсср
Priority date: 1981-01-04
Filing date: 1981-01-04
Publication date: 1982-07-30

Description

Изобретение относитс к контрольно-измерительной технике и может быть использовано дл измерени на плоских ферромагнитных издели х на предпри ти х металлургической и металлсюбрабатывающей отраслей промышленности при нанесении защитных пок рытий .The invention relates to instrumentation engineering and can be used to measure flat ferromagnetic products in enterprises of the metallurgical and metal-processing industries when applying protective coatings.

Известен способ измерени толщины покрытий на детал х из ферромагнитного материала, заключающийс в том, что помещают над поверхностью контролируемого покрыти магнит и по распределению магнитного потока суд т о толщине покЕити .A known method for measuring the thickness of coatings on parts made of ferromagnetic material consists in that a magnet is placed above the surface of the coating to be tested and judged by the thickness of the magnetic flux by the distribution of the magnetic flux.

Устройство дл реализации этого способа содержит два магнитопровода П-образный и Н-образный, расположенные один над другим и создающие вместе с посто нными магнитами две згалкнутые идентичные магнитные цепи.A device for implementing this method contains two U-shaped and H-shaped magnetic circuits, located one above the other and creating, together with permanent magnets, two open-faced identical magnetic circuits.

При установке прибора на испытуемую деталь один из магнитных потоков частично замыкаетс через ферромагнитное основание детали, что фиксируетс электромагнитными датчиками 1 .When the device is installed on the tested part, one of the magnetic fluxes partially closes through the ferromagnetic base of the part, which is detected by electromagnetic sensors 1.

Недостатками известных способа и устройства вл ютс невозможность измерений больших толщин покрытийThe disadvantages of the known method and device are the impossibility of measuring large thickness of coatings.

ж1следствие распределени магнитного потока на небольшую глубину, а также сложность конструкции и настройки прибора.It is a consequence of the distribution of the magnetic flux to a small depth, as well as the complexity of the design and adjustment of the device.

Наиболее близким по технической сущности к изобретению вл етс магнитный способ измерени покрытий на плоских ферромагнитных издели х, заключающийс в том, что помещают нгщ поверхностью контролируемого покрыти магнит и измер ют силу его прит же-. ни , завис щую от рассто ни до поверхности ферромагнитного издели , и по величине этого прит жени суд т о толщине покрыти .The closest to the technical essence of the invention is a magnetic method for measuring coatings on flat ferromagnetic products, which consists in placing a magnet on the surface of a monitored coating on a magnet and measuring its strength. It does not depend on the distance to the surface of the ferromagnetic product, and the magnitude of this attraction determines the thickness of the coating.

: Магнитное устройство, реализующее способ, содержит корпус, посто нный магнит, св занный с корпусом упругой св зью 2.: The magnetic device implementing the method comprises a body, a permanent magnet associated with the body by an elastic bond 2.

Недостатком способа и устройства дл его реализации вл етс недостаточна чувствительность и точность измерений покрытий вследствие наличи значительного зазора между маг- . нитом и изделием, необходимого дл свободного хода магнита.The disadvantage of the method and device for its implementation is the lack of sensitivity and accuracy of coating measurements due to the presence of a significant gap between the mag. nit and the product needed for the free run of the magnet.

Claims

The purpose of the invention is to improve the accuracy of control when measuring coatings. The goal is achieved by the fact that in a magnetic method of measuring coatings on flat ferromagnetic products, a magnet is placed above the surface of the coated coating and the force of its attraction is measured, the magnitude of which is judged by the thickness of the coating; . A magnetic device containing a permanent magnet, combined with an elastic connection to the body, is provided with an additional permanent magnet connected by an elastic connection to the body and hinged to the main magnet, a scale attached to the main magnet, and a pointer connected to the additional magnet. with a magnet. The drawing shows a diagram of the device for implementing the proposed method. The device consists of two permanent magnets 1 and 2, two elastic links 3 and 4, a hinge link 5, a circular scale b, a pointer 7 and a housing 8. The permanent main magnet 1 is located at an angle H to the surface of the product, one its end is attached to the body 8 by a hinge connection 5, and the other end is attached to the case 8 by an elastic connection 3. A circular scale 6 is rigidly attached to the magnet. Similarly, the permanent magnet 2 is also angled to the surface of the product, one end is attached to the case 8 is articulated 5 and the other end is attached to the core 8 usu elastic bond magnet 4. By 2 is attached to zhes pointer 7. The method is carried out as follows. Install the device on the surface of the controlled coating. In this case, the permanent magnet 1, attracted to the ferromagnetic base, was turned off and, turning around the hinge, deformed the elastic bond 3. The angle .4 of the inclination of the magnet 1 to the surface decreases. Circular scale 6, rigidly CB with magnet 1, is rotated relative to pointer 7 when it is turned. moves relative to the dial b. Thus, the movement of the cases 6 and the pointer 7 occurs in opposite directions, which doubles the accuracy of the reference. By the magnitude of the movement of the pointer 7 relative to the scale, the thickness of the coating is judged. The proposed method and device for its implementation make it possible to significantly improve the accuracy of measuring thick-layer coatings on flat ferromagnetic products. Claim 1. Magnetic method of measuring coatings on flat ferromagnetic products, which consists in placing a magnet above the surface of the tested cover and measuring the strength of its attraction, the magnitude of which depends on the thickness of the coating, characterized in that Increasing the accuracy of j-magnet is placed at an angle to the surface of the coating and measuring the change in angle (Tilt. 2. Magnetic device for measuring coatings on flat ferromagnetic products containing a permanent magnet connected by an elastic connection to the building A catfish, characterized in that it is provided with an additional permanent magnet connected by an elastic connection to the body and hingedly connected to the main magnet, a scale attached to the main magnet and an indicator connected to the additional permanent magnet .... Sources of information, taken into account during the examination 1.Zak Japan Japan 52-27538, CL G 01 B 7/10, 1977.

2. US patent 3.453.984 cl. G 01 R 33/00, 1966 (prototype). // 7/7 / y /