CN1229019A - Method for vibration grinding and cutting rare-earth magnet - Google Patents
Method for vibration grinding and cutting rare-earth magnet Download PDFInfo
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- CN1229019A CN1229019A CN 98100734 CN98100734A CN1229019A CN 1229019 A CN1229019 A CN 1229019A CN 98100734 CN98100734 CN 98100734 CN 98100734 A CN98100734 A CN 98100734A CN 1229019 A CN1229019 A CN 1229019A
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Abstract
A vibration grinding method for cutting rare-earth magnet is suitable for Nd-Fe-B mangets, type-1 to type-5 rare earth-Co magnets, type-2 to type-17 rare earth-transition metal magnets and other rare earth-Fe magnets, as well as ferrite and semiconductor features that its cutting tool is the blade or band knife with abrasive particles on it and the cutting tool and workpiece do relative vibration while cut for higher cutting efficiency and quality.
Description
The invention belongs to the machine cuts manufacture field of intermetallic compound section bar material.Be mainly used in the machine cuts processing of Nd-Fe-B series, 1-5 type rare earth-cobalt system, 2-17 type rare earth-transition metal system, other rare-earth-iron series magnet, also can be used for the machine cuts processing of fragile materials such as ferrite, semiconductor.
The rare-earth magnet that with the Nd-Fe-B series is representative has fabulous magnetic property, is a current extremely valued electron-like material, is widely used in fields such as computer peripheral, communicator and automobile.This material is used conventional powder metallurgic method manufacturing more, generally is difficult for making smallclothes products such as thin, thin, is generally block materials.Many magnet devices are used the sheet type part more, so the block that present multiple purpose aeroplane tool cutting process method obtains from powder metallurgic method cuts required thin slice.
Because this material is hard and crisp, cuts with the existing mechanical cutting method, cutting efficiency is very low, and cut surface is easy to generate and collapses the limit phenomenon.
The object of the present invention is to provide a kind of easy, efficient and can access the machine cuts processing method of good cut surface quality.
The concrete process characteristic of the inventive method is as follows.Cutter is with when workpiece is done relative principal cutting movement in cutting process, make cutter do relative vibration with workpiece, vibration frequency is that 50Hz-50kHz, amplitude are that 0.001mm-0.5mm, direction of vibration are on the plane parallel with principal cutting movement, direction of vibration can be on the principal cutting movement direction, can on direction of feed, can also be vibrate on this both direction synthetic also.Owing in the process of main cutting, introduce vibration, the formation that Integrated Chip stays on cutting speed in the little sword working angles of abrasive particle, each amount of feeding, chip removal mode and the little sword all improves, and cutting resistance reduces, stock-removing efficiency improves, the cut surface quality improves thereby make.
Compared with prior art, the present invention has following advantage:
(1) cutting efficiency improves more than 20%;
(2) cut surface fineness improves a grade.
Embodiment 1
According to the method for the invention, utilize machine cuts device shown in Figure 1, percentage by weight is 29%Nd, 0.5%Pr, 1.5%Dy, 1.0%B, all the other are the Nd-Fe-B series sintered magnet of iron.The experimental parameter that uses is: the centripetal force=2Kgf of rotating speed=3000 of main shaft (1) rev/min, workbench (4), size=Φ 25mm * 3 of workpiece (3), the Vibration Parameter of vibrator (6): frequency=50Hz, amplitude=0.5mm, direction are on direction of feed.
Record every cutter t=4 clipping time with stopwatch and divided 17 seconds, measure cut surface roughness Ra=0.4-0.8 μ m with surface smoothness.
Comparative example 1
Except that vibrator (6) was not worked, the centripetal force of the material of all cutting modes, workpiece (3), the rotating speed of main shaft (1), workbench (4), the size of workpiece (3) etc. were complete identical with embodiment 1.
Every cutter t=5 clipping time that records with stopwatch divided 57 seconds, the surface smoothness Ra=1.6-0.8 μ m that records with the surface smoothness analyzer.
From measurement result as can be seen, in the main cutting process, introduce vibration after, cutting efficiency and cut surface fineness be improved significantly.
According to the method for the invention, utilize the used reciprocating machine cutter sweep cutting SmCo5 sintered magnet of Fig. 2.The experimental parameter that uses is: reciprocating frequency=120 time/minute, the Vibration Parameter of size=φ 20mm * 5 of the centripetal force=1.5kgf of workbench (4), workpiece (5) piece, vibrator (6): frequency=100Hz, amplitude=0.3mm, direction are on direction of feed.
Measure every cutter t clipping time with stopwatch, measure cut surface roughness Ra with the surface smoothness analyzer.The gained result divided 15 seconds for t=5, Ra=0.3-0.6 μ m.
Comparative example 2
Except that vibrator (6) was not worked, used cutting mode, workpiece (5) material, reciprocating motion speed, workbench (4) centripetal force, workpiece (5) size etc. were complete identical with embodiment 2.
Every cutter t=6 clipping time that records with stopwatch divided 20 seconds, the cut surface roughness Ra=0.5-1.0 micron that records with the surface smoothness analyzer.
From measurement result as can be seen, in main cutting process, introduce vibration after, cutting efficiency and cut surface fineness all be improved significantly.
According to the method for the invention, utilize rotary machine cutter sweep cutting Sm shown in Figure 1
2(Fe, Co, Cu, Zr)
16.5Sintered magnet.Experimental parameter is fully identical with embodiment 1.
Every cutter t=4 clipping time that records at last divided 20 seconds, cut surface roughness Ra=0.5-0.9 micron.The result shows, obtains good cutting efficiency and cut surface fineness.
Description of drawings:
Fig. 1 is a rotary machine cutting schematic diagram of the present invention.Workbench (4) is provided with vibrator (6), when principal cutting movement, workpiece (3) that blade (5) is done rotation are done the straight-line feed motion and cut, forces bin (2) to drive workpiece (3) and does to vibrate on the vertical direction.
Fig. 2 is a reciprocating machine cutting schematic diagram of the present invention.Saw bow (1) drive cutting edge is coated with adamantine cutter system (2) and does reciprocal principal cutting movement.Workbench (4) drives bin (3), and workpiece (5) is done vertical feed motion, and in cutting, vibrator (6) forces bin (3) to drive workpiece (5) and produces vibration.
Claims (4)
1, the cutting method of fragile materials such as a kind of intermetallic compound type rare-earth magnet, ferrite, semiconductor, it is characterized in that: use the cutter that has abrasive particle to make relative cutting movement to finish the cutting to workpiece with workpiece, cutter and workpiece are done relative vibration workpiece is decided cutting movement with cutter when.
2, method according to claim 1 is characterized in that the vibration frequency of the relative vibration between workpiece and the cutter is 50Hz-50kHz; Amplitude is between 0.001mm-0.5mm; Direction of vibration can can also be vibrate on these two kinds of directions synthetic in direction of feed also in cutting direction.
3, method according to claim 1 is characterized in that cutter is a kind of cutter that has abrasive particle, and abrasive particle can be diamond, cubic boron nitride or the higher material of other hardness; The shape of tool can be belt, bar shaped or circular sheet.
4, method according to claim 1, the main cutting movement that it is characterized in that cutter and workpiece can be a back and forth movement, also can be gyration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98100734 CN1229019A (en) | 1998-03-16 | 1998-03-16 | Method for vibration grinding and cutting rare-earth magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98100734 CN1229019A (en) | 1998-03-16 | 1998-03-16 | Method for vibration grinding and cutting rare-earth magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1229019A true CN1229019A (en) | 1999-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98100734 Pending CN1229019A (en) | 1998-03-16 | 1998-03-16 | Method for vibration grinding and cutting rare-earth magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1229019A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101522383B (en) * | 2006-10-05 | 2013-01-30 | Thk株式会社 | Scribe device and scribe method |
-
1998
- 1998-03-16 CN CN 98100734 patent/CN1229019A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101522383B (en) * | 2006-10-05 | 2013-01-30 | Thk株式会社 | Scribe device and scribe method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |