CN201616310U

CN201616310U - Large-scale ferromagnetic part demagnetizing device

Info

Publication number: CN201616310U
Application number: CN2009203159461U
Authority: CN
Inventors: 王天朝; 郑海东
Original assignee: MCC SFRE Heavy Industry Equipment Co Ltd
Current assignee: MCC SFRE Heavy Industry Equipment Co Ltd
Priority date: 2009-11-26
Filing date: 2009-11-26
Publication date: 2010-10-27
Anticipated expiration: 2019-11-26

Abstract

The utility model discloses a large-scale ferromagnetic part demagnetizing device. The demagnetizing device comprises a demagnetizing coil and a control circuit thereof, wherein, the structure of the demagnetizing coil comprises an iron core; each layer of silicon steel sheet of the iron core consists of an L-shaped sheet and a horizontal sheet which are in butt joint with each other to form a U-shaped structure, and layers of silicon steel sheets intersect and overlap to form the iron core; two coil frames are respectively sleeved on the inner sections of the two long edges of the U-shaped iron core; a coil is wound on each coil frame; the structure of the control circuit is that the coils of the demagnetizing device passing through alternating-current contactors and low-voltage circuit breakers sequentially are connected with power sources respectively; and one end of the alternating-current contactor is connected with a zero line, and the other end thereof is connected with a microcomputer, a switch and the power source sequentially. The demagnetizing device solves the difficult problem in the prior art of large-scale ferromagnetic part demagnetization, and has the advantages of simple structure, convenient and flexible operation and good demagnetizing effect.

Description

A kind of large-scale ferromagnetic part demagnetizer

Technical field

The utility model belongs to material surface heat treatment technics field, relates to a kind of large-scale ferromagnetic part demagnetizer.

Background technology

In the heavy-duty machinery manufacturing, large-scale ferromagnetic part very easily is magnetized in adopting disk handling, fracture detection by magnetic powder and the flat surface grinding course of processing, the part that the is magnetized processing of must demagnetizing.Existing demagnetizer or power are little, or are not suitable for the demagnetization processing of the big workpiece of the various abnormal shapes of heavy-duty machinery industry, though the method for employing heating can reach the effect of degaussing, have a strong impact on the dimensional accuracy of workpiece.How special-shaped, large-scale workpiece are thoroughly demagnetized, and don't influence a great problem that its geometric accuracy becomes the heavy-duty machinery manufacturing.

Summary of the invention

The purpose of this utility model provides a kind of large-scale ferromagnetic part demagnetizer, and it is not thorough to have solved the large-scale ferromagnetic part demagnetization that exists in the prior art, perhaps damages the problem of workpiece.

The technical scheme that the utility model adopted is, a kind of large-scale ferromagnetic part demagnetizer, comprise degaussion coil and control circuit thereof, the structure of described degaussion coil is, comprise iron core, every layer of silicon steel sheet of iron core formed " U " font structure by " L " shape sheet and the butt joint of " one " font sheet, and the layer of silicon steel sheet forms with layer juxtaposition, two long limit inner segments at " U " font iron core respectively are set with a coil rack, are wound with coil on each coil rack; The structure of described control circuit is, the coil of demagnetizer is connected respectively with power supply by A.C. contactor, low-voltage circuit breaker successively, a termination zero line of A.C. contactor, and the other end of A.C. contactor is connected with microcomputer, switch, power supply successively.

Demagnetizer of the present utility model, its feature are that also described microcomputer is also in parallel with signal lamp.

Demagnetizer of the present utility model has solved the difficult problem of the large-scale ferromagnetic part demagnetization that exists in the prior art, and simple in structure, flexible to operation, demagnetization effectiveness is good, does not influence the geometric accuracy of workpiece.

Description of drawings

Fig. 1 is a degaussion coil structural representation of the present utility model;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the control circuit electrical schematic diagram of the utility model demagnetizer;

Fig. 4 is a kind of demagnetization embodiment fundamental diagram of the utility model device;

Fig. 5 is the another kind demagnetization embodiment fundamental diagram of the utility model device.

Among the figure, 1. iron core, 2. coil rack, 3. coil, 4. workpiece, 5. insulation board, 6. nylon lifting rope, 7. demagnetizer.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

The utility model demagnetizer comprises degaussion coil and control circuit composition thereof.

As Fig. 1, Fig. 2, degaussion coil structural representation for the utility model demagnetizer, its structure is, iron core 1 is formed " U " font structure by every layer of silicon steel sheet by " L " shape sheet and the butt joint of " one " font sheet, layer forms with layer juxtaposition, and this iron core 1 is manufactured conveniently, can satisfy and set and instructions for use, two long limit inner segments at " U " font iron core 1 respectively are set with a coil rack 2, are wound with coil 3 on each coil rack 2.

As Fig. 3, be the control circuit electrical schematic diagram of the utility model demagnetizer, in its circuit, L is a signal lamp, selects diameter 25 models of AD1 for use.PC is a microcomputer, selects the ZYT05 model for use.SB1 is a switch, selects LA18-22X two position models for use.QF is a low-voltage circuit breaker, selects the DZ20Y-100/3000-50A model for use.KM1 is an A.C. contactor, selects the CJ20-40-380V model for use.T11 is a U type degaussion coil, selects the specification of 20KVA for use.

The structure of the control circuit in the utility model demagnetizer is, the coil T11 of demagnetizer is connected respectively with power supply L1, L2 by A.C. contactor KM1, low-voltage circuit breaker QF successively, the end of A.C. contactor KM1 is connected with N (zero line), the other end is connected with microcomputer PC, switch S B1, power supply L2 successively, and microcomputer PC is also in parallel with signal lamp L.

Power supply L1, L2 all adopt 380V, 50Hz AC power, configure the operating time and the blanking time of demagnetization in the program of microcomputer PC in advance, connect the coil power of demagnetizer in short-term, and the workpiece that is magnetized is demagnetized.

According to H-B magnetic hysteresis loop fundamental characteristics theory, by theory analysis, exist many magnetic domains in the inside of ferromagnetic material, because these magnetic domains are being arranged mussily, all cancel each other in their magnetic field, ferromagnetic material does not externally show magnetic.If ferromagnetic material is put into directional magnetic field, these magnetic domains will be done regular arrangement along the direction of external magnetic field, form complementary field.Because each magnetic domain originally all was what to have magnetized strongly, so the complementary field that they produced is also very strong.Make the remanent magnetism complete obiteration, give to add on the coil on the large-scale demagnetizer to exchange the 380V50HZ alternating current, because iron core is not a closed magnetic path, the energising period forms magnetic field between two magnetic poles, and being put into magnetic field by the demagnetization thing, moment can demagnetize.

When the utility model device demagnetized work, according to the structure difference of workpiece, method of operation comprised following three kinds:

First kind, as shown in Figure 4, the stickup thickness bigger slightly than its area is 5 to 10 millimeters insulation board 5 on iron core 1, tie the workpiece 4 that needs demagnetization with nylon lifting rope 6, hanging nylon lifting rope 6 with overhead traveling crane then slings workpiece 4, the part surface that is magnetized is facing to iron core 1, according to the difference of the intensity that is magnetized, demagnetized surface of the work and iron core 1 end face distance remain on 10mm-20mm, keep workpiece static.Setting work is 1 second 60 seconds at interval on PC.Connect demagnetizer 7 starting switches, PC control demagnetizer 7 work 1 second, demagnetization automatically in 60 seconds at interval.After stopping, detecting whether to also have remanent magnetism with examination magnetic spare, if also be magnetic, can utilize following two kinds of methods to repeat above operation: one is to reduce workpiece be magnetized face and iron core 1 end face distance; The 2nd, be magnetized workpiece surperficial and the several directions of the many changes of iron core 1 relative direction, demagnetized fully until workpiece.

Second kind, the workpiece of the phenomenon that is magnetic for being magnetized in the endoporus, the method for employing is:

Utilize moving armature, on the end face that is received iron core 1, the other end reaches the part that is magnetized in the hole, connects the demagnetizer starting switch, and is the same by PC control, then demagnetization automatically.

The third, as shown in Figure 5, for super-huge workpiece or equipment, the method for employing is:

With nylon lifting rope 6 demagnetizer 7 of slinging, can make iron core 1 end face towards any direction as required, pasting thickness in workpiece demagnetization one side is 5 to 10 millimeters insulation board 5.Keeping iron core 1 and needing the distance of demagnetization surface portion is 10mm-20mm.Keep iron core 1 static, connect the starting switch of demagnetizer 7, demagnetizer 7 is according to PC set point work 1 second, demagnetization automatically in 60 seconds at interval.

This demagnetizer has the following advantages: to the large-scale workpiece of needs demagnetization, regardless of kind; Demagnetization intensity is big, wide ranges; Can guarantee by demagnetization workpiece geometric accuracy indeformable; It is safe and reliable to demagnetize, and demagnetization is fast, and is effective; Can expand any workpiece or equipment for the needs demagnetization.

Demagnetizer of the present utility model has solved the difficult problem of the Large Fe magnetic parts demagnetization that exists in the prior art, and simple in structure, flexible to operation, demagnetization effectiveness is good.

Claims

1. one kind large-scale ferromagnetic part demagnetizer is characterized in that, comprises degaussion coil and control circuit thereof,

The structure of described degaussion coil is, comprise iron core (1), every layer of silicon steel sheet of iron core (1) formed " U " font structure by " L " shape sheet and the butt joint of " one " font sheet, the layer of silicon steel sheet forms with layer juxtaposition, two long limit inner segments at " U " font iron core (1) respectively are set with a coil rack (2), are wound with coil (3) on each coil rack (2);

The structure of described control circuit is, the coil of demagnetizer (3) is connected respectively with power supply by A.C. contactor, low-voltage circuit breaker successively, a termination zero line of A.C. contactor, and the other end of A.C. contactor is connected with microcomputer, switch, power supply successively.

2. part demagnetizer according to claim 1 is characterized in that, described microcomputer is also in parallel with signal lamp.