CN117798663B - Riveting method for nanocrystalline strip block iron core in electromagnetic relay - Google Patents
Riveting method for nanocrystalline strip block iron core in electromagnetic relay Download PDFInfo
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- CN117798663B CN117798663B CN202410234901.0A CN202410234901A CN117798663B CN 117798663 B CN117798663 B CN 117798663B CN 202410234901 A CN202410234901 A CN 202410234901A CN 117798663 B CN117798663 B CN 117798663B
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- truncated cone
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 30
- 229910052742 iron Inorganic materials 0.000 claims abstract description 15
- 238000003475 lamination Methods 0.000 claims description 25
- 239000000696 magnetic material Substances 0.000 claims description 20
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910000640 Fe alloy Inorganic materials 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 238000003825 pressing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- -1 DT4E Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention discloses a riveting method of a nanocrystalline strip block iron core in an electromagnetic relay, which comprises the following steps: step 1: square bosses at two ends of the nanocrystalline strip block iron core are in clearance fit with square hole grooves of the inner yoke and the long yoke; step 2: placing the nanocrystalline strip block iron core in a riveting clamp, uniformly riveting the edges of the rectangular hole grooves of the long yoke by using a conical rivet head, and completing riveting of the magnetizer; step 3: after ensuring that the magnetizer is firm in structure and the nanocrystalline strip block iron core is in close contact with the long yoke iron, and no obvious air gap exists between the nanocrystalline strip block iron core and the long yoke iron, sleeving the wound coil into the iron core; step 4: and (3) riveting the boss at the other end of the nanocrystalline strip block iron core and the inner yoke by adopting the riveting method which is the same as the step (2), and measuring the total height of the riveted electromagnetic assembly to ensure that the total height is within a preset tolerance range. The invention overcomes the difficulty that the nanocrystalline strip block iron core and the yoke cannot be riveted due to insufficient ductility.
Description
Technical Field
The invention belongs to the field of electromagnetic relay assembly processes, and relates to a press riveting assembly process for a nanocrystalline strip block iron core.
Background
The nanocrystalline magnetic material is used as an emerging light soft magnetic material, has the magnetic advantages of high magnetic conductivity, stable magnetic performance and the like, and can theoretically shorten the response time of the dynamic characteristics of the relay and realize the light production of products if the nanocrystalline magnetic material is applied to the field of relays. However, due to the specificity of the preparation method of the magnetic material and the complexity of the types of alloy elements, the laminated magnetic material does not have similar ductility and toughness as the traditional relay soft magnetic (such as electrical pure iron DT4C, DT E and the like), and the laminated magnetic material is easy to have laminated brittle fracture due to uneven stress in the non-lamination direction. Therefore, the defects in the workability of the magnetic material limit the application of the nanocrystalline magnetic material in electromagnetic relays.
The block iron core is used as a magnetic conduction piece with the simplest processing procedure and structure in the electromagnetic relay, the production of parts can be realized without the processing technologies such as bending, milling and the like for structural shaping, and the lower requirement on the mechanical property of the magnetic material provides possibility for the mass production of the nanocrystalline strip block iron core.
However, the riveting method depending on the ductility of the iron core magnetic material such as the end boss of the iron core of the rotary riveting machine and the end boss of the columnar riveting head press-riveting iron core is not suitable for the amorphous nanocrystalline strip block iron core, and deformation extrusion from the non-lamination direction can cause a large amount of scraps on the end boss of the iron core, so that the iron core, the long yoke iron and the inner yoke iron cannot be firmly riveted, and meanwhile, redundancy is generated.
Disclosure of Invention
The invention aims to provide a riveting method of a nanocrystalline strip block iron core in an electromagnetic relay and a conical rivet head for realizing the method, which are used for solving the problems that the nanocrystalline magnetic material cannot realize riveting or the magnetic material is damaged (scraps are generated) by the adopted riveting process.
The invention aims at realizing the following technical scheme:
A riveting method of a nanocrystalline strip block iron core in an electromagnetic relay comprises the following steps:
Step 1: making square bosses at two ends of the nanocrystalline strip block iron core and square hole grooves of the inner yoke and the long yoke into clearance fit, wherein: the material properties of the inner yoke and the long yoke are traditional soft magnetic materials with ductility, such as electrician pure iron DTC, DT4E, iron-nickel alloy 1J50 and the like; the maximum gap size between the square boss and the square hole groove is 0.2mm;
Step 2: placing the nanocrystalline strip block iron core in a riveting clamp, uniformly riveting the edges of the rectangular hole grooves of the long yoke by using a conical rivet head, and completing riveting of the magnetizer;
step 3: after ensuring that the magnetizer is firm in structure and the nanocrystalline strip block iron core is in close contact with the long yoke iron, and no obvious air gap exists between the nanocrystalline strip block iron core and the long yoke iron, sleeving the wound coil into the iron core, wherein: the air gap is as small as possible and even is close to zero so as to avoid overlarge pull-in voltage of the relay product caused by overlarge air gap;
Step 4: and (2) riveting the boss at the other end of the nanocrystalline strip block iron core and the inner yoke by adopting the riveting method which is the same as the step (2), and measuring the total height of the riveted electromagnetic assembly to ensure that the total height is within a set tolerance range, wherein: the main body height of the bosses at the two ends of the nanocrystalline strip block iron core is slightly larger than or equal to the height of the coil framework, and the length and the width of the section of the iron core are slightly smaller than those of the coil framework, so that the contact area between the nanocrystalline strip block iron core and two yokes is small and the air gap is overlarge due to the fact that the main body height of the nanocrystalline strip block iron core is too short; or the coil cannot be sleeved into the nanocrystalline strip block iron core normally due to the overlong section and the too wide section of the nanocrystalline strip block iron core.
The conical rivet for realizing the riveting method comprises a square rivet body, wherein a first flat truncated conical bulge, a second flat truncated conical bulge, a third flat truncated conical bulge and a fourth flat truncated conical bulge extend from the middle part of four sides of the square rivet body clockwise in sequence; wherein: the first flat truncated cone-shaped bulge and the third flat truncated cone-shaped bulge are symmetrical relative to the direction of the iron core lamination of the rivet passing reference shaft; the second flat truncated cone-shaped bulge and the fourth flat truncated cone-shaped bulge are symmetrical relative to the non-lamination direction of the iron core of the rivet passing reference shaft.
Compared with the prior art, the invention has the following advantages:
(1) The standardized nanocrystalline iron core with the brand is applied to the actual production of relay products, and a specific riveting process is adopted according to the mechanical properties of nanocrystalline magnetic materials, so that the nanocrystalline magnetic materials can be applied to electromagnetic relays. The method provides a test basis for the actual performance analysis of the nanocrystalline magnetic material in the relay product, and also provides a guiding direction for the subsequent preparation method research of the nanocrystalline magnetic material.
(2) According to the flat symmetrical flat nose cone-shaped rivet, the flat pressing rivets with different distances are designed in the lamination direction and the non-lamination direction to quantitatively control the stress of the nanocrystalline strip block iron core, so that the stress difference between the iron core lamination direction and the non-lamination direction is caused, the expansion in the lamination direction is facilitated, the expansion in the non-lamination direction is controlled, and the applicability is good.
(3) According to the riveting method provided by the invention, in order to overcome the difficulty that the nanocrystalline strip block iron core and the yoke iron cannot be riveted due to insufficient ductility, the riveting of the nanocrystalline strip block iron core which cannot be realized before is realized by accurately controlling the riveting force application modes and the application amounts in different directions, and meanwhile, the damage (generation of fragments) to the nanocrystalline magnetic material is avoided.
Drawings
FIG. 1 is a flow chart of the riveting process of a nanocrystalline strip block core in an electromagnetic relay according to the present invention;
FIG. 2 is a schematic illustration of a riveted electromagnetic assembly;
FIG. 3 is a schematic view of a flat symmetrical flat nose cone rivet designed according to the present invention;
Fig. 4 is a schematic diagram of the operation of the flat symmetrical flat nose cone rivet according to the present invention.
Detailed Description
The following description of the present invention is provided with reference to the accompanying drawings, but is not limited to the following description, and any modifications or equivalent substitutions of the present invention should be included in the scope of the present invention without departing from the spirit and scope of the present invention.
The invention provides a riveting method of a nanocrystalline strip block iron core in an electromagnetic relay, and a specific conical rivet is designed aiming at the method.
As shown in fig. 1, the method specifically includes the following steps:
Step 1: making square bosses at two ends of the iron core and square hole grooves of the inner yoke and the long yoke into clearance fit, wherein: the maximum gap size between the square boss and the square hole groove is 0.2mm; the material properties of the inner yoke and the long yoke are traditional soft magnetic electric pure iron DTC with ductility, and the iron core is a nanocrystalline strip iron core 1K107B.
Step 2: and placing the iron core in a riveting clamp, and uniformly riveting the edge of the rectangular hole groove of the long yoke by utilizing the conical rivet to finish the riveting of the magnetizer. This riveting process, unlike spin riveting and the like, generates a large amount of surplus scraps and cannot complete the riveting.
Step 3: after ensuring that the magnetizer is firm in structure and the iron core is tightly contacted with the long yoke iron and no obvious air gap exists between the magnetizer and the long yoke iron, sleeving the wound coil into the iron core; wherein: the air gap is as small as possible, even close to zero, so as to avoid the overlarge actuation voltage of the relay product caused by overlarge air gap.
Step 4: riveting the boss at the other end of the iron core and the inner yoke is completed by adopting the riveting method which is the same as the step 2, and the total height of the riveted electromagnetic assembly is measured to ensure that the total height is within a preset tolerance range, as shown in fig. 2. Wherein: the main body height of the amorphous nanocrystalline strip block iron core except the bosses at the two ends is slightly larger than or equal to the height of the coil framework, and the length and the width of the section of the iron core are slightly smaller than those of the coil framework, so that the contact area between the iron core and the two yokes is small and the air gap is overlarge due to the fact that the main body height of the iron core is too short are avoided; or the coil cannot be sleeved into the iron core normally due to the overlong and too wide section of the iron core.
The rivet designed by the invention is a flat symmetrical flat conical rivet, and flat pressing rivets with different intervals are designed for the lamination direction and the non-lamination direction to quantitatively control the stress of the iron core in the two directions. As shown in fig. 3, the rivet comprises a square rivet body, wherein a first flat truncated cone-shaped bulge, a second flat truncated cone-shaped bulge, a third flat truncated cone-shaped bulge and a fourth flat truncated cone-shaped bulge extend from the middle part of four sides of the square rivet body clockwise in turn; wherein: the first flat truncated cone-shaped bulge and the third flat truncated cone-shaped bulge are symmetrical relative to the direction of the iron core lamination of the rivet passing reference shaft; the second flat truncated cone-shaped bulge and the fourth flat truncated cone-shaped bulge are symmetrical relative to the non-lamination direction of the iron core of the rivet passing reference shaft; typically the distance D1 between the first and third flat truncated cone shaped protrusions is greater than the distance D2 between the second and fourth flat truncated cone shaped protrusions.
The flat pressing rivet heads with different distances are designed for the lamination direction and the non-lamination direction of the iron core, and the stress of the iron core in two directions is quantitatively controlled by controlling the distance between the pressing rivet heads and the pressing rivet positions of the yoke. As shown in fig. 4, the rivet head and the core share a reference axis during press riveting, wherein: the vertical distance between the first flat truncated cone-shaped bulge and the third flat truncated cone-shaped bulge and the front and rear two parallel surfaces of the end part of the iron core to be riveted in the non-lamination direction is 0.5mm, the vertical distance between the second flat truncated cone-shaped bulge and the fourth flat truncated cone-shaped bulge and the front and rear two parallel surfaces of the end part of the iron core to be riveted in the lamination direction is 0.2mm, the riveting force in different directions is different, the main riveting direction is the iron core lamination direction, and therefore the expansion in the lamination direction is facilitated, and the expansion in the non-lamination direction is controlled.
Claims (6)
1. The riveting method of the nanocrystalline strip block iron core in the electromagnetic relay is characterized by comprising the following steps of:
Step 1: square bosses at two ends of the nanocrystalline strip block iron core are in clearance fit with square hole grooves of the inner yoke and the long yoke;
Step 2: placing the nanocrystalline strip block iron core in a riveting clamp, uniformly riveting the edge of the rectangular hole groove of the long yoke through a conical rivet, and completing riveting of the magnetizer, wherein:
The conical rivet is a flat symmetrical truncated cone rivet and comprises a square rivet body, wherein a first flat truncated cone bulge, a second flat truncated cone bulge, a third flat truncated cone bulge and a fourth flat truncated cone bulge are sequentially extended from the middle part of four sides of the square rivet body in a clockwise winding direction; wherein: the first flat truncated cone-shaped bulge and the third flat truncated cone-shaped bulge are symmetrical relative to the direction of the iron core lamination of the rivet passing reference shaft; the second flat truncated cone-shaped bulge and the fourth flat truncated cone-shaped bulge are symmetrical relative to the non-lamination direction of the iron core of the rivet passing reference shaft;
the distance D1 between the first flat truncated cone-shaped bulge and the third flat truncated cone-shaped bulge is greater than the distance D2 between the second flat truncated cone-shaped bulge and the fourth flat truncated cone-shaped bulge;
the rivet head and the iron core share a reference shaft, wherein: the vertical distance between the first flat truncated cone-shaped bulge and the third flat truncated cone-shaped bulge and the front and back two parallel surfaces of the end part of the iron core to be riveted in the non-lamination direction is 0.5mm, and the vertical distance between the second flat truncated cone-shaped bulge and the fourth flat truncated cone-shaped bulge and the front and back two parallel surfaces of the end part of the iron core to be riveted in the lamination direction is 0.2mm;
Step 3: after ensuring that the magnetizer is firm in structure and the nanocrystalline strip block iron core is in close contact with the long yoke iron, and no obvious air gap exists between the nanocrystalline strip block iron core and the long yoke iron, sleeving the wound coil into the iron core;
Step 4: and (3) riveting the boss at the other end of the nanocrystalline strip block iron core and the inner yoke by adopting the riveting method which is the same as the step (2), and measuring the total height of the riveted electromagnetic assembly to ensure that the total height is within a preset tolerance range.
2. The riveting method of the nanocrystalline strip block iron core in the electromagnetic relay according to claim 1, wherein the material properties of the inner yoke and the long yoke are ductile soft magnetic materials.
3. The riveting method of the nanocrystalline strip block iron core in the electromagnetic relay according to claim 2, wherein the soft magnetic material is electrical pure iron or iron-nickel alloy.
4. The riveting method of the nanocrystalline strip block iron core in the electromagnetic relay according to claim 3, wherein the electrical pure iron is DTC or DT4E, and the iron-nickel alloy is 1J50.
5. The riveting method of the nanocrystalline strip block iron core in the electromagnetic relay according to claim 1, wherein the maximum gap size between the square boss and the square hole groove is 0.2mm.
6. The riveting method of the nanocrystalline strip block iron core in the electromagnetic relay according to claim 1, wherein the main body height of the bosses at two end parts of the nanocrystalline strip block iron core is larger than or equal to the height of the coil skeleton, and the length and the width of the section of the nanocrystalline strip block iron core are smaller than those of the coil skeleton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410234901.0A CN117798663B (en) | 2024-03-01 | 2024-03-01 | Riveting method for nanocrystalline strip block iron core in electromagnetic relay |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410234901.0A CN117798663B (en) | 2024-03-01 | 2024-03-01 | Riveting method for nanocrystalline strip block iron core in electromagnetic relay |
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| CN117798663A CN117798663A (en) | 2024-04-02 |
| CN117798663B true CN117798663B (en) | 2024-05-07 |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000077227A (en) * | 1998-08-31 | 2000-03-14 | Matsushita Electric Works Ltd | Coil bobbin |
| CN1797638A (en) * | 2004-12-22 | 2006-07-05 | 中国科学院金属研究所 | Time delay relay |
| CN201302957Y (en) * | 2008-11-14 | 2009-09-02 | 贵州航天电器股份有限公司 | Multi-coil electromagnetic system for electromagnetic relay |
| CN101640143A (en) * | 2009-08-14 | 2010-02-03 | 郁晓亮 | Magnetic-retaining coil magnetic circuit system with double H-type armature components |
| CN102361374A (en) * | 2011-10-28 | 2012-02-22 | 安泰科技股份有限公司 | Protective box type amorphous, microcrystal or nano-crystal alloy stator core for motor and preparation method thereof |
| CN102430687A (en) * | 2011-11-03 | 2012-05-02 | 苏州东风精冲工程有限公司 | Double-end pressure riveting method, riveting pin and pressure riveting device |
| CN103367046A (en) * | 2013-05-31 | 2013-10-23 | 厦门宏发电声股份有限公司 | Small-size magnetic latching power relay |
| CN107437481A (en) * | 2017-09-05 | 2017-12-05 | 三友联众集团股份有限公司 | A kind of magnetic circuit system for magnetic latching relay |
| CN206742154U (en) * | 2017-04-26 | 2017-12-12 | 广东高登智能电力有限公司 | A kind of relay yoke and the frock clamp of iron core riveting |
| CN115890571A (en) * | 2022-12-22 | 2023-04-04 | 南京腾亚精工科技股份有限公司 | Point inspection mouth self-riveting tool |
| CN117316712A (en) * | 2023-09-26 | 2023-12-29 | 厦门宏发电力电器有限公司 | Yoke and iron core connection structure, coil assembly and relay |
-
2024
- 2024-03-01 CN CN202410234901.0A patent/CN117798663B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000077227A (en) * | 1998-08-31 | 2000-03-14 | Matsushita Electric Works Ltd | Coil bobbin |
| CN1797638A (en) * | 2004-12-22 | 2006-07-05 | 中国科学院金属研究所 | Time delay relay |
| CN201302957Y (en) * | 2008-11-14 | 2009-09-02 | 贵州航天电器股份有限公司 | Multi-coil electromagnetic system for electromagnetic relay |
| CN101640143A (en) * | 2009-08-14 | 2010-02-03 | 郁晓亮 | Magnetic-retaining coil magnetic circuit system with double H-type armature components |
| CN102361374A (en) * | 2011-10-28 | 2012-02-22 | 安泰科技股份有限公司 | Protective box type amorphous, microcrystal or nano-crystal alloy stator core for motor and preparation method thereof |
| CN102430687A (en) * | 2011-11-03 | 2012-05-02 | 苏州东风精冲工程有限公司 | Double-end pressure riveting method, riveting pin and pressure riveting device |
| CN103367046A (en) * | 2013-05-31 | 2013-10-23 | 厦门宏发电声股份有限公司 | Small-size magnetic latching power relay |
| CN206742154U (en) * | 2017-04-26 | 2017-12-12 | 广东高登智能电力有限公司 | A kind of relay yoke and the frock clamp of iron core riveting |
| CN107437481A (en) * | 2017-09-05 | 2017-12-05 | 三友联众集团股份有限公司 | A kind of magnetic circuit system for magnetic latching relay |
| CN115890571A (en) * | 2022-12-22 | 2023-04-04 | 南京腾亚精工科技股份有限公司 | Point inspection mouth self-riveting tool |
| CN117316712A (en) * | 2023-09-26 | 2023-12-29 | 厦门宏发电力电器有限公司 | Yoke and iron core connection structure, coil assembly and relay |
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| CN117798663A (en) | 2024-04-02 |
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