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Mold for preparing lace magnetic steel, orientation forming press and method thereof
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A technology of oriented forming and magnetic steel, which is applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve the problems of low residual magnetism and easy cracks, and achieve the reduction of crack rate, increase of yield, and crack rate low effect
Pending Publication Date: 2020-03-24
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is that in the prior art, when special-shaped molds are used to produce special-shaped products, cracks are easy to occur and the residual magnetism is relatively low. However, a mold for preparing lace magnets, an orientation forming press and its method
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Embodiment 1
[0093] Embodiment 1 goal is to prepare such as Figure 7 The dimensions of the shown lace magnets satisfy the following conditions: a=40mm, b=30mm, radius R=11mm.
[0094] In order to prepare the target lace magnetic steel in this embodiment, the following mold 1.
[0095] This mold 1 comprises front side plate 2 ( Figure 15 ), rear side panel 3, left side panel 4 and right side panel 5. Wherein, the front side plate 2, the rear side plate 3, the left side plate 4 and the right side plate 5 surround a mold cavity 6 ( Figure 11 ).
[0096] The central area of the front side plate 2 and the rear side plate 3 close to the cavity 6 is a magnetically permeable area 7, and the area other than the central area is a non-magnetic area 8 ( Figure 12 ); The materials of the left side plate 4 and the right side plate 5 are non-magnetic materials.
[0097] The width of the magnetic conduction area 7 is equal to the width of the cavity 6, and the shape is corresponding to the lace...
Embodiment 2
[0131] Embodiment 2 aims to prepare such as Figure 8 The dimensions of the lace magnetic steel shown meet the following conditions: a=40mm, b=30mm, c=12mm.
[0132] Its preparation method is identical with embodiment 1. Those skilled in the art know that the die and the upper and lower punches are adapted according to the desired product.
[0133] The dimensions of the obtained magnets are as Figure 8 As shown, a=40mm, b=30mm, c=12mm.
[0134] The properties of the prepared products are shown in Table 2.
[0135] The product performance that table 2 prepares
[0136]
[0137] The crack rate of the product of the invention is less than or equal to 0.2%, which is equivalent to the crack rate of the square product; the crack rate of the traditional method is 1%-5%.
Embodiment 3
[0139] Embodiment 2 aims to prepare such as Figure 9 The dimensions of the lace magnetic steel shown meet the following conditions: a=40mm, b=30mm, c=12mm.
[0140] Its preparation method is identical with embodiment 1. Those skilled in the art know that the die and the upper and lower punches are adapted according to the desired product.
[0141] The dimensions of the obtained magnetic steel are shown in Figure 99, a=40mm, b=30mm, c=12mm.
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Abstract
The invention discloses a mold for preparing lace magnetic steel, an orientation forming press and a method thereof. The mold comprises a front side plate, a rear side plate, a left side plate and a right side plate, wherein the front side plate, the rear side plate, the left side plate and the right side plate define a cavity with an upper opening and a lower opening, wherein the left side plateand the right side plate are both made of non-magnetic materials, the central areas of the sides, close to the cavity, of the front side plate and the rear side plate are magnetic conduction areas, the areas except the central areas are non-magnetic conduction areas, the width of the magnetic conductive area is equal to that of the cavity, and the shape of the magnetic conductive area correspondsto that of the lace magnetic steel. The mold is advantaged in that the prepared lace magnetic steel has high residual magnetism (residual magnetism is greater than or equal to 13.5 kGs), high quality(low crack rate) and excellent magnetic properties (Hcj is greater than or equal to 24kOe, Hcb is greater than or equal to 12.5 kOe, and maximum magnetic energy product is greater than or equal to 43.5 MGOe), the process can be simplified, the yield is increased, and cost is reduced.
Description
technical field [0001] The invention relates to a mold for preparing lace magnetic steel, an orientation forming press and a method thereof. Background technique [0002] During the actual use of the motor, it was found that the four corners of the square-shaped magnetic steel bear a large demagnetization current and are easy to demagnetize. If the four corners of the square-shaped magnetic steel can be canceled and a magnet with higher remanence can be used, the anti-demagnetization ability can be improved and the raw material consumption of the magnetic steel can be reduced. Therefore, it is necessary to produce special-shaped sheet-shaped magnetic steel products lacking four corners. [0003] In the prior art, when producing special-shaped products, the parallel orientation pressing technology can be used, but because the orientation degree of the magnetic steel will be destroyed during parallel pressing, it is impossible to produce high remanence products. Therefore, w...
Claims
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Application Information
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