A permanent ferrite magnetic tile cemented carbide mold and its assembly method

A permanent magnet ferrite and cemented carbide technology, which is applied in the manufacture of mold separation devices, molds, inductors/transformers/magnets, etc., can solve the problems of poor thermal expansion and contraction stability of stainless steel, easy loosening and falling off of alloys, and large actual errors. , to avoid excessive shrinkage changes, improve accuracy and quality, and avoid the effect of temperature

Active Publication Date: 2019-05-28
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high hardness and high brittleness of the alloy, the poor stability of thermal expansion and cold contraction of stainless steel, the calculated value of the interference between the alloy and the matrix of the die matrix has a large error with the actual value, and the high-temperature electric furnace has a low uniformity of temperature rise, so that the process of each cavity Inconsistent fit
If the actual interference is too large, the stress of the alloy after inlaying is large, cracks are likely to occur and the mold will be scrapped; if the actual interference is too small, the alloy is easy to loosen and fall off in the die matrix after inlaying, and the mold cannot be used

Method used

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  • A permanent ferrite magnetic tile cemented carbide mold and its assembly method
  • A permanent ferrite magnetic tile cemented carbide mold and its assembly method
  • A permanent ferrite magnetic tile cemented carbide mold and its assembly method

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as Figure 1~4 Said, a permanent ferrite magnetic tile cemented carbide mold, which includes a die base 1 and an alloy cavity 2, a through hole 3 is opened in the middle of the die base, the through hole is a step hole, and the depth of the step 4 is 7mm , the large hole is 4mm larger than the small hole; the shape of the alloy cavity matches the through hole in the matrix of the die, a cavity 5 is provided in the middle of the alloy cavity, and a protrusion matching the step hole is provided outside the upper end of the alloy cavity 6. The size of the cavity is 0.02mm larger than the size of the step hole; the matrix of the die is made of non-magnetic stainless steel, and the alloy cavity is made of non-magnetic hard alloy.

[0038] A method for assembling a permanent ferrite magnetic tile cemented carbide mold, comprising the following steps:

[0039] a) Add water to the electric heating box and heat to 100°C;

[0040] b) Put the matrix of the die into the heat...

Embodiment 2

[0043] Such as Figure 1~4 Described, a kind of hard alloy mold of permanent magnet ferrite magnetic tile, it comprises die substrate 1 and alloy cavity 2, has a through hole 3 in the middle of die substrate, and through hole is step hole, and the depth of step 4 is 5mm , the large hole is 3mm larger than the small hole; the shape of the alloy cavity matches the through hole in the matrix of the die, a cavity 5 is provided in the middle of the alloy cavity, and a protrusion matching the step hole is provided outside the upper end of the alloy cavity 6. The size of the cavity is 0.01mm larger than the size of the step hole; the die base is made of non-magnetic stainless steel, and the alloy cavity is made of non-magnetic hard alloy.

[0044] A method for assembling a permanent ferrite magnetic tile cemented carbide mold, comprising the following steps:

[0045] a) Add assembly oil to the electric heating box and heat to 80°C;

[0046] b) Put the die matrix into the heated ass...

Embodiment 3

[0051] Such as Figure 1~4 Described, a kind of hard alloy mold of permanent magnet ferrite magnetic tile, it comprises die substrate 1 and alloy cavity 2, has a through hole 3 in the middle of die substrate, and through hole is a step hole, and the depth of step 4 is 6mm , the large hole is 4mm larger than the small hole; the shape of the alloy cavity matches the through hole in the matrix of the die, a cavity 5 is provided in the middle of the alloy cavity, and a protrusion matching the step hole is provided outside the upper end of the alloy cavity 6. The size of the cavity is 0.015mm larger than the size of the step hole; the die base is made of non-magnetic stainless steel, and the alloy cavity is made of non-magnetic hard alloy.

[0052] A method for assembling a permanent ferrite magnetic tile cemented carbide mold, comprising the following steps:

[0053] a) Add assembly oil to the electric heating box and heat to 110°C;

[0054] b) Put the die matrix into the heated...

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Abstract

The invention belongs to the technical field of alloy moulds, and discloses a permanent magnetic ferrite magnetic tile hard alloy mould. The permanent magnetic ferrite magnetic tile hard alloy mould comprises a concave mould base body and an alloy mold cavity. A through hole is formed in the middle of the concave mould base body. The through hole is a stepped hole. The shape of the alloy mold cavity is matched with the through hole in the concave mould base body. The middle of the alloy mold cavity is provided with a cavity body. The outer side of the upper end of the alloy mold cavity is provided with a protrusion which is matched with the stepped hole. The invention further discloses an assembly method of the permanent magnetic ferrite magnetic tile hard alloy mould. According to the permanent magnetic ferrite magnetic tile hard alloy mould, teeny interference fit assembly is adopted, so that the alloy mould can neither be damaged nor be disengaged; and as the assembly of the concave mould base body and the alloy mold cavity is conducted in assembly liquid, the temperature is more stable during the assembly, and the assembly pressure is more uniform.

Description

technical field [0001] The invention relates to the technical field of alloy moulds, in particular to a permanent ferrite magnetic tile cemented carbide mold and an assembly method thereof. Background technique [0002] The permanent magnet ferrite tile is arc-shaped, and is usually pressed and formed by a shaping die. Magnetic tile raw material particles (Fe 3 o 4 and Fe 2 o 3 Powder) has high hardness, so the wear resistance of the mold is high, and the cavity of the mold is generally made of non-magnetic hard alloy (WC085). [0003] The cost of non-magnetic cemented carbide is relatively high (550-700 yuan / Kg), and the hardness is HRA80-90. Therefore, when designing the concave mold of the mold, only the cavity part is made of non-magnetic hard alloy, and the concave mold module is made of non-magnetic stainless steel, and the alloy is embedded in the concave mold module. [0004] The currently known permanent magnet ferrite hard alloy mold embedding method is to pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B7/26B28B7/00B28B7/34H01F41/02
CPCB28B7/0029B28B7/26B28B7/34H01F41/0266
Inventor 卢晓强黄华为张筝陈辉明
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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