CN115132478A - A manufacturing process of a laminated magnetic core - Google Patents

Abstract

A manufacturing process of a laminated magnetic core, which relates to a magnetic core manufacturing process technology, and comprises the following steps: preparation of raw materials: selecting 15um-30um amorphous 1k101 alloy material; debugging shape: using a mold to adjust the shape of the magnetic core; pressing Synthetic type: the debugged material is pressed by a press to ensure a certain shape; blank sintering: sintering for a certain period of time; blanking and cooling: exit sintering, and leave it to cool to normal temperature; cleaning and grinding Processing; superposition forming; stamping and fixing; secondary grinding; debugging and inspection, the beneficial effects of the present invention are: through the improvement of the process, the magnetic core can be formed and used without using the winding machine, and the magnetic core can be changed. The molding method ensures that the magnetic core can have better frequency characteristics, low loss and temperature stability, and the magnetic permeability and electromagnetic properties of the magnetic core are also guaranteed to a certain extent.

Description

A manufacturing process of a laminated magnetic core

technical field

The invention relates to a manufacturing process technology of a magnetic core, in particular to a manufacturing process of a laminated magnetic core.

Background technique

Magnetic core refers to a sintered magnetic metal oxide composed of various iron oxide mixtures. For example, manganese-zinc ferrite and nickel-zinc ferrite are typical magnetic core materials. Manganese-zinc ferrites are characterized by high magnetic permeability and high magnetic flux density with low loss characteristics. Nickel-zinc ferrites have extremely high resistivity and low magnetic permeability of less than a few hundred. Ferrite cores are used in coils and transformers of various electronic devices.

In actual production operations, people will manufacture different magnetic cores according to different needs in order to perform better work. For example, the silicon steel sheet iron core is an alloy, and a small amount of silicon is added to pure iron (usually below 4.5%). ) formed of iron-silicon alloys are called silicon steels. This type of iron core has the highest saturation magnetic induction intensity value of 20000Gs; because of their good magnetoelectric properties, easy mass production, low price, and little influence of mechanical stress, they are widely used in the power electronics industry; Permalloy often refers to iron-nickel alloys, and the nickel content is in the range of 30 to 90%. It is a very widely used soft magnetic alloy suitable for high frequency and low voltage transformers, leakage protection switch cores, common mode inductor cores and current transformer cores. Magnetic cores can provide people with convenience in industrial production work, but still Has the following deficiencies:

In the prior art, after the sintering is completed, the magnetic core needs to be superimposed and wound by a winding machine. However, the magnetic permeability and electromagnetic performance of the iron core produced by winding with a winding machine are relatively low, which affects its overall performance. Frequency characteristics and temperature stability.

SUMMARY OF THE INVENTION

The purpose of the present invention is to aim at the prior art, after the magnetic core is sintered, it needs to be stacked and wound by a winding machine, and the magnetic permeability and electromagnetic performance of the iron core produced by winding with the winding machine are relatively low. , which further affects the overall frequency characteristics and temperature stability, and provides a manufacturing process for a laminated magnetic core.

In order to achieve the above object, the present invention adopts the following technical solutions: a manufacturing process of a laminated magnetic core, which comprises the following steps: preparation of raw materials: selecting 15um-30um amorphous 1k101 alloy material; debugging shape: using a mold to make a magnetic core Shape adjustment; compression molding: the debugged material is pressed with a press to ensure a certain shape; blank sintering: sintering for a certain period of time; blanking and cooling: exit sintering, and place it to cool naturally to Normal temperature; cleaning and grinding processing: after cooling, use cleaning agent to clean, and then carry out rough grinding, fine grinding and independent grinding in sequence; superposition molding: according to the needs, select the corresponding number of magnetic cores for superposition; stamping and fixing: use a stamping machine to The superimposed magnetic core is stamped and pressed to ensure its fixed shape; secondary grinding: the pressed material is subjected to secondary grinding; debugging inspection: the magnetic core is inspected and tested to exclude unqualified products.

As a more optimized aspect of the present invention: the raw material can be replaced with an amorphous 1k107 alloy material.

As a more optimized aspect of the present invention: the sintering time in the blank sintering should be controlled within 190-210 min.

As a more optimized aspect of the present invention: the independent grinding in the cleaning and grinding process can be performed manually.

As a more optimized aspect of the present invention: the inspection in the debugging inspection should inspect the size of the finished product, the appearance of the finished product, the electromagnetic performance, and the inductance coefficient.

As a more optimized aspect of the present invention, the bulk density, particle distribution, water content, flow angle and magnetization of the raw materials should be checked before preparing the raw materials.

As a more optimized aspect of the present invention: the rough grinding, fine grinding and independent grinding can be carried out with a grinding machine, and an ultrasonic generator can be used for detection and inspection.

After the above technical solution is adopted, the beneficial effects of the present invention are: through the improvement of the process, the magnetic core can be formed and used without using the winding machine, and the forming method of the magnetic core is changed, so as to ensure the magnetic core. Under the condition of better frequency characteristics, low loss and temperature stability, the magnetic permeability and electromagnetic properties of its magnetic core are also guaranteed to a certain extent.

Detailed ways

The technical solution adopted in this specific embodiment is: it includes the following steps: preparation of raw materials: selecting 15um-30um amorphous 1k101 alloy material; debugging shape: using a mold to adjust the shape of the magnetic core; pressing and forming: adjusting it The material is pressed by a press to ensure a certain shape; blank sintering: sintering for a certain period of time; blanking and cooling: exit sintering, and place it to cool to normal temperature naturally; cleaning and grinding: After cooling, use a cleaning agent to carry out Cleaning, followed by rough grinding, fine grinding and independent grinding; superimposed forming: according to the needs, select the corresponding number of magnetic cores to be superimposed; stamping and fixing: use a punching machine to stamp and press the superimposed magnetic cores to ensure their fixation Shape; secondary grinding: the material after pressing is subjected to secondary grinding; debugging inspection: inspection and testing of the magnetic core to exclude unqualified products.

The raw material can be replaced with amorphous 1k107 alloy material. The sintering time in the blank sintering should be controlled within 190-210 minutes. The independent grinding in the cleaning and grinding process can be manually polished. In the debugging and inspection The inspection should check the size of the finished product, the appearance of the finished product, the electromagnetic properties and the inductance coefficient, etc. Before preparing the raw materials, the looseness, particle distribution, water content, flow angle and magnetization of the raw materials should be checked. Grinding and independent grinding can be carried out with a grinding machine, and an ultrasonic generator can be used for inspection and inspection.

After the above technical solution is adopted, the beneficial effects of the present invention are: through the improvement of the process, the magnetic core can be formed and used without using the winding machine, and the forming method of the magnetic core is changed, so as to ensure the magnetic core. Under the condition of better frequency characteristics, low loss and temperature stability, the magnetic permeability and electromagnetic properties of its magnetic core are also guaranteed to a certain extent.

The above is only used to illustrate the technical solution of the present invention and not to limit it. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be Included within the scope of the claims of the present invention.

Claims (7)

1. A manufacturing process of a laminated magnetic core is characterized in that: it comprises the following steps:

1) preparing raw materials: selecting an amorphous 1k101 alloy material of 15um-30 um;

2) debugging the shape: adjusting the shape of the magnetic core by using a die;

3) pressing and molding: pressing the debugged material by using a press machine to ensure a certain shape;

4) blank discharging and sintering: sintering for a certain time;

5) blanking and cooling: the sintering is withdrawn, and the mixture is placed and naturally cooled to the normal temperature;

6) cleaning and polishing: cleaning by using a cleaning agent after cooling, and sequentially performing coarse polishing, fine polishing and independent polishing links;

7) and (3) overlapping and forming: selecting a corresponding number of magnetic cores to stack according to requirements;

8) punching and fixing: the superposed magnetic cores are punched and pressed by a punching machine, so that the fixed shape of the magnetic cores is ensured;

9) secondary grinding: performing secondary grinding on the pressed material;

10) debugging and checking: and (5) inspecting and detecting the magnetic core, and removing unqualified products.

2. The process of claim 1, wherein: the raw material can be replaced by amorphous 1k107 alloy material.

3. The process of claim 1, wherein: the sintering time in step 4 should be controlled at 190-210 min.

4. The process of claim 1, wherein: and 6, independently polishing, namely polishing by utilizing manpower.

5. The process of claim 1, wherein: in the step 10, it is checked that the finished product size, the finished product appearance, the electromagnetic performance, the inductance coefficient and the like should be checked.

6. The process of claim 1, wherein: before the preparation of the raw materials, the raw materials should be checked for their apparent density, particle distribution, water content, flow angle, and magnetization.

7. The process of claim 1, wherein: the rough polishing, the fine polishing and the independent polishing can be performed by a polishing machine, and an ultrasonic generator is used for detection and inspection.