CN202384170U - Resin gasket for improving qualified rate of double-faced mill of sintered magnetic block - Google Patents
Resin gasket for improving qualified rate of double-faced mill of sintered magnetic block Download PDFInfo
- Publication number
- CN202384170U CN202384170U CN2011205529757U CN201120552975U CN202384170U CN 202384170 U CN202384170 U CN 202384170U CN 2011205529757 U CN2011205529757 U CN 2011205529757U CN 201120552975 U CN201120552975 U CN 201120552975U CN 202384170 U CN202384170 U CN 202384170U
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- China
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- magnetic block
- mill
- resin gasket
- double
- faced
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Abstract
The utility model relates to a resin gasket for improving the qualified rate of a double-faced mill of a sintered magnetic block. The cross section of the resin gasket is in an angle-shaped structure, and is arranged on an upper corner of each magnetic body, the length L1 of the angle-shaped resin gasket is 2/3-4/5 of the length of an actual magnetic block (2); the width L2 is 3-5mm smaller than the final size required by milling processing; the height L3 of the resin gasket positioned between an upper limit plate and a lower limit plate is larger than 1/2 of the thickness of the magnetic block (2); and the thickness H is 5-6mm. The angle-shaped resin gasket is arranged on the upper corner of each processed magnetic block, so that the magnetic block can be compacted and can move forwards along a guide rail, the magnetic block can be protected against collision, the reject ratio can be reduced to 0.1-0.5%, and the qualified rate of a double-faced mill product of sintered neodymium iron boron permanent magnets is greatly improved.
Description
Technical field
The utility model belongs to the machining technique field of Nd-Fe-Bo permanent magnet material, particularly relates to a kind of resin mat that improves the two-sided mill qualification rate of sintering magnetic patch, in the mill processing unit (plant) process of Nd-Fe-Bo permanent magnet material, uses.
Technical background
Rare-earth Nd-Fe-B permanent magnetic material has excellent magnetic performance, is applied to new and high technology and new industry more and more widely, is the critical function material of energy-conserving and environment-protective and green energy resource.In order to measure and guarantee the magnetic property of sintered NdFeB permanent magnet piece product, must grind processing to four of its original sintering magnetic patch or six faces, could on magnetic determining device, measure its magnetic.Nd-Fe-Bo permanent magnet material composition and phase composition mainly contain＞Nd more than 95%
2Fe
14B Hard Magnetic intermetallic compound is formed, and it is a kind of not only hard but also crisp material, is difficult to processing.Secondly, in powder metallurgy sintered process, the contraction and the densification of Nd-Fe-Bo permanent magnet material briquetting blank often make magnet surface behind the sintering uneven or produce the phenomenon of recessed contraction.Therefore; Original sintering magnetic patch is in the two-sided mill course of processing, and when previous crops ran through the rectilinear motion of double-sided grinding, collision can make magnetic patch produce and much knock limit arrisdefect phenomenon each other along guide rail; Directly influence the qualification rate of Nd-Fe-Bo permanent magnet material, disqualification rate is up to 10-15% sometimes.
The utility model content
To the problem that above-mentioned horizontal type double-side mill apparatus exists in the processing of Nd-Fe-B permanent magnetic bulk magnet after to sintering, the utility model provides a kind of resin mat that improves the two-sided mill qualification rate of sintering magnetic patch.
To achieve these goals; The technical scheme of the utility model provides a kind of resin mat that improves the two-sided mill qualification rate of sintering magnetic patch; Its cross section structure is
angle type, is arranged on the corner, upper end of every magnet; Its size and thickness should decide according to the concrete size of sintering magnetic patch, each grinding depth of cut and charging rate.The length L 1 of
type resin mat is the 2/3-4/5 of actual magnetic block length; Width L2 is than the desired final size narrowing toward each end 3-5mm of mill processing; Height L3 about being positioned between limiting plate is greater than 1/2 of magnetic patch thickness; Thickness H=5-6mm.
Because Nd-Fe-Bo permanent magnet material composition and phase composition mainly are to have＞Nd2Fe14B Hard Magnetic intermetallic compound composition 95% or more, it is a kind of not only hard but also crisp material, is difficult to process.In powder metallurgy sintered process, because the contraction and the densification of Nd-Fe-Bo permanent magnet material powder compact blank, often make magnet surface behind the sintering uneven or produce recessed shrinkage phenomenon.Therefore; Original sintering magnetic patch is in the two-sided mill course of processing; The crawler type feeding mechanism promotes ndfeb magnet in a row when guide rail runs through the double-sided grinding moving linearly forward; All be added
type resin mat of a kind of the utility model at the processed magnetic patch of each piece; Be placed on the corner, upper end of magnet;
type resin mat width is than mill processing final size narrowing toward each end 3-5mm, can compress magnetic patch and can make not only it travel forward but also protect magnetic patch extruding not taking place and collide with each other along guide rail.Described
type resin mat is selected plastics, nylon, polymethyl methacrylate, rubber, polytetrafluoroethylene or polyurethane resin material for use.Consider the corrosion resistance of material, intensity, hardness and flexible, oil resistant and resistance to wear, and repeatedly use optimization polyurethane resin in the production practices repeatedly.
The beneficial effect of the utility model is:
The utility model is in the horizontal Double End mill course of processing; The processed magnetic patch of each piece all is added the utility model
type resin mat; Be placed on the corner, upper end of magnet; Can compress magnetic patch can make not only it travel forward but also protect magnetic patch not collided with along guide rail; Disqualification rate can be reduced to 0.1-0.5%, and the product percent of pass behind the two-sided mill of sintered NdFeB permanent magnet piece is improved greatly.
Rare earth is the non-renewable valuable source of country, and national rare earth resources is protected and saved in the application of the utility model.
Description of drawings
Fig. 1 is the utilization structure sketch map of the utility model.
Fig. 2 is the structural representation of the utility model.
Fig. 3 is the vertical view of Fig. 2.
The sketch map that Fig. 4 uses in lathe for the utility model.
Fig. 5 is the I portion enlarged diagram of Fig. 4.
Among the figure: 1, resin mat, 2, ndfeb magnet, 3, the chain belt feeder, 4, bakelite wheel, 5, the limiting plate governor motion, 6, the emery wheel bistrique, 7, the guide limiting plate, L1, resin mat length, L2, resin mat width, L3, resin mat height, H, resin mat thickness.
Embodiment
According to accompanying drawing and embodiment the utility model is elaborated below.
As shown in Figure 1; The utility model is a kind of resin mat that improves the two-sided mill qualification rate of sintering magnetic patch; Its cross section structure is
angle type, is arranged on the corner, upper end of every magnet 2; The size of resin mat 1 and thickness should decide according to the concrete size of sintering magnetic patch 2, each grinding depth of cut and charging rate, and many different size series can be arranged, and specific requirement is: the length L 1 of resin mat 1 is the 2/3-4/5 of actual magnetic patch 2 length; Width L2 is than the desired final size narrowing toward each end 3-5mm of mill processing; Resin mat 1 height L3 about being positioned between limiting plate is greater than 1/2 of magnetic patch 2 thickness; Thickness H=5-6mm.
The utility model can adopt plastics, nylon, polymethyl methacrylate, rubber, polytetrafluoroethylene or polyurethane resin material.
When the utility model uses; Be placed on
type resin mat 1 on the corner, upper end of magnet 2; Be loaded with the sintered NdFeB permanent magnet piece 2 of
type resin mat 1; Be close in a row along guide rail moving linearly forward with crawler type feeding mechanism 3 front and back; Through bakelite wheel 4; Get into upper and lower guide limiting plate 7 passages that governor motion 5 is adjusted in advance; Send into two-sided emery wheel bistrique 6 grindings, be collected then and dry, change down the machine work field over to one with cotton; After implementing the utility model; Because the protective effect of
1 pair of sintered NdFeB permanent magnet piece 2 of type resin mat; In the mill course of processing of horizontal type double-side mill apparatus Nd-Fe-Bo permanent magnet material bulk magnet 2 after to sintering; The limit arrisdefect phenomenon of knocking of magnetic patch 2 reduces greatly; Be reduced to 0.1-0.5% from original spoilage 10-15%, not only guaranteed product quality but also improved economic benefit.
Above-mentioned utility model execution mode if any the change and the enforcement of similar techniques content, is the protection content of the utility model technical scheme.
Claims (2)
1. resin mat that improves the two-sided mill qualification rate of sintering magnetic patch; It is characterized in that: its cross section structure is
angle type, is arranged on the corner, upper end of every magnet (2).
2. a kind of resin mat that improves the two-sided mill qualification rate of sintering magnetic patch according to claim 1 is characterized in that:
length L 1 of type resin mat be the 2/3-4/5 of actual magnetic patch (2) length; Width L2 is than the desired final size narrowing toward each end 3-5mm of mill processing; Resin mat height L3 about being positioned between limiting plate is greater than 1/2 of magnetic patch (2) thickness; Thickness H=5-6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205529757U CN202384170U (en) | 2011-12-27 | 2011-12-27 | Resin gasket for improving qualified rate of double-faced mill of sintered magnetic block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205529757U CN202384170U (en) | 2011-12-27 | 2011-12-27 | Resin gasket for improving qualified rate of double-faced mill of sintered magnetic block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202384170U true CN202384170U (en) | 2012-08-15 |
Family
ID=46632657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205529757U Expired - Lifetime CN202384170U (en) | 2011-12-27 | 2011-12-27 | Resin gasket for improving qualified rate of double-faced mill of sintered magnetic block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202384170U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109119239A (en) * | 2018-09-07 | 2019-01-01 | 天津京磁电子元件制造有限公司 | The mill processing method of sintered NdFeB |
-
2011
- 2011-12-27 CN CN2011205529757U patent/CN202384170U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109119239A (en) * | 2018-09-07 | 2019-01-01 | 天津京磁电子元件制造有限公司 | The mill processing method of sintered NdFeB |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |
|
| CX01 | Expiry of patent term |