Magnetic core machining die

Abstract

The utility model discloses a magnetic core machining die which comprises a pressing die, a female die is arranged below the pressing die, a die cavity is formed in the female die, a middle column is fixed in the middle of the interior of the pressing die, the middle column is formed in the pressing die, the height of the middle column is 1.55 mm, three sets of cylinders are distributed at the upper end of the middle column in a circumferential mode, and the three sets of cylinders are arranged in the middle of the pressing die. The cylinder is formed on the middle column, and the diameter of the cylinder is 5 mm. The die has the beneficial effects that the three small cylinders with the diameter of 5.0 mm are designed on the 1.55 mm middle column in the pressing die, so that demolding is facilitated when a blank is pressed; meanwhile, a blank product center pillar with the height of 1.55 mm is directly manufactured in a female die and is directly processed to 1.10 mm at a time after being sintered, and verification shows that the problem that the cost is increased due to the fact that a large depth air gap needs to be formed in a magnetic core center pillar is solved, the investment of new equipment is avoided, the cost of a short center pillar magnetic core is greatly reduced, the market competitiveness of the product is improved, and high popularization value is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic core processing devices, in particular to a magnetic core processing mold. Background Art

[0002] The original height of the center column of the EQ3927 magnetic core was 8.4mm. When it was ground to a height of 1.1mm, one method was to complete it by opening the air gap of the center column of the magnetic core, that is, using an air gap grinder to grind the center column. However, there are high costs in the processing process (the cost of opening the air gap reaches 0.75 yuan / piece) and the weight reduction after grinding leads to material waste. Therefore, the above problems are solved by reducing the amount of center column grinding; another way is to purchase a press with an upper and lower two-die frame for production. The unit price of a 60-ton upper and lower two-die press is 660,000 yuan.

[0003] The above two methods are both expensive, and a mold that does not require additional equipment and can reduce the amount of grinding is needed to solve this problem. Utility Model Content

[0004] (1) Technical issues to be solved

[0005] The technical problem to be solved by the utility model is to achieve the product target by improving the mold without increasing the equipment investment and reducing the cost of opening the air gap, in view of the current status of the existing equipment.

[0006] (2) Technical solution

[0007] The utility model is realized through the following technical solution: the utility model proposes a magnetic core processing mold, including a pressing mold, a concave mold is arranged below the pressing mold, a mold cavity is arranged in the concave mold, a middle column is fixed in the middle of the pressing mold, three groups of cylinders are distributed in a circle on the upper end of the middle column, and an external seat is arranged in the middle of the top end of the pressing mold.

[0008] Furthermore, the mold cavity is formed in the female mold, and the specifications of the compression mold and the female mold are matched.

[0009] By adopting the above technical solution, the blank product is directly pressed in the mold cavity in the die.

[0010] Furthermore, the external seat is formed on the die, and a connecting cavity is provided in the external seat.

[0011] By adopting the above technical solution, the external seat facilitates the connection between the die and the external driving mechanism.

[0012] (3) Beneficial effects

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In order to solve the problem that the existing magnetic core processing press is used to process the shorter (1.1mm height) middle column (the middle column is generally 8.4mm high) by opening the air gap of the magnetic core middle column, that is, using an air gap grinder to grind the middle column. The above method has the problems of high cost (the cost of opening the air gap reaches 0.75 yuan / piece) and material waste caused by the weight reduction after grinding. The utility model designs three small cylinders with a diameter of 5.0mm on the 1.55mm middle column in the die to facilitate demolding when the blank is pressed; at the same time, the middle column of the blank product with a height of 1.55mm is directly made in the die, and after sintering, it is directly processed to 1.10mm at one time. After verification, it solves the cost increase caused by the need to open a large air gap in the magnetic core middle column, avoids the investment in new equipment, greatly reduces the cost of the short middle column magnetic core, improves the market competitiveness of the product, and has a high promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a magnetic core processing mold described in the utility model;

[0016] Figure 2 It is a bottom view of a pressing die in a magnetic core processing die described in the utility model.

[0017] The following are the descriptions of the reference numerals:

[0018] 1. Concave die; 2. Cavity; 3. Press die; 4. External seat; 5. Cylinder; 6. Center column. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] like Figure 1-Figure 2 As shown, a magnetic core processing mold in this embodiment includes a die 3, a die 1 is provided below the die 3, a mold cavity 2 is provided in the die 1, and the blank product is directly pressed in the mold cavity 2 in the die 1, and a center column 6 is fixed in the middle of the die 3, and the center column 6 is formed in the die 3. The height of the center column 6 is 1.55 mm, which can make the height of the center column of the blank product 1.55 mm, reducing the air gap wear. Three groups of cylinders 5 are distributed in a circular pattern on the upper end of the center column 6, and the cylinder 5 is formed on the center column 6. The diameter of the cylinder 5 is 5 mm, and the cylinder 5 is convenient for demolding from the pressed blank product. An external seat 4 is provided in the middle of the top of the die 3, and the external seat 4 facilitates the connection of the die 3 with the external driving mechanism.

[0021] like Figure 1-Figure 2As shown, in this embodiment, the mold cavity 2 is formed in the female mold 1, and the specifications of the compression mold 3 match those of the female mold 1.

[0022] like Figure 1-Figure 2 As shown, in this embodiment, the external seat 4 is formed on the die 3 , and a connecting cavity is defined in the external seat 4 .

[0023] The specific implementation process of this embodiment is as follows: first, the die 1 is fixed, and the die 3 is connected to the driving mechanism through the external seat 4. During the pressing process of the magnetic core blank, the driving mechanism drives the die 3 and the die 1 to close the mold. At this time, the blank product is directly pressed in the mold cavity 2 in the die 1, and the middle column 6 with a height of 1.55mm can make the height of the middle column of the blank product 1.55mm, reducing the air gap grinding amount. After the pressing is completed, the cylinder 5 is easy to demold, and then it is only necessary to grind the middle column with a height of 1.55 in the blank product to a height of 1.1mm, and only 0.45 needs to be polished. At the same time, material waste is also reduced, which effectively solves the cost increase caused by the need to open a large air gap in the middle column of the magnetic core, avoids the investment in new equipment, greatly reduces the cost of the short middle column magnetic core, and improves the market competitiveness of the product.

[0024] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic core processing mold, characterized in that: The invention comprises a die (3), a concave die (1) is provided below the die (3), a die cavity (2) is provided in the concave die (1), a center column (6) is fixed in the middle of the die (3), the center column (6) is formed in the die (3), the height of the center column (6) is 1.55 mm, three groups of cylinders (5) are distributed in a circular pattern on the upper end of the center column (6), the cylinders (5) are formed on the center column (6), and the diameter of the cylinders (5) is 5 mm.

2. A magnetic core processing mold according to claim 1, characterized in that: An external seat (4) is provided at the middle of the top end of the pressing die (3).

3. The magnetic core processing mold according to claim 1, characterized in that: The mold cavity (2) is formed in the female mold (1).

4. A magnetic core processing mold according to claim 3, characterized in that: The specifications of the compression mold (3) and the concave mold (1) match.

5. The magnetic core processing mold according to claim 2, characterized in that: The external seat (4) is formed on the die (3), and a connecting cavity is provided in the external seat (4).

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