CN102319851A - Cold precision forging technique for Z type contacts - Google Patents
Cold precision forging technique for Z type contacts Download PDFInfo
- Publication number
- CN102319851A CN102319851A CN201110246949A CN201110246949A CN102319851A CN 102319851 A CN102319851 A CN 102319851A CN 201110246949 A CN201110246949 A CN 201110246949A CN 201110246949 A CN201110246949 A CN 201110246949A CN 102319851 A CN102319851 A CN 102319851A
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- CN
- China
- Prior art keywords
- die forging
- cold closed
- cold
- type fingertip
- blank
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- 238000005242 forging Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 239000010949 copper Substances 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims description 16
- 238000000137 annealing Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000005034 decoration Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000010273 cold forging Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920000914 Metallic fiber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
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Abstract
The invention discloses a cold precision forging technique for Z type contacts, which relates to the technical field of cold precision forging and solves the problem that the conventional machining technique of post-forging bending can hardly guarantee the designed shapes and application requirements of Z type contacts. The technique includes the steps that: a copper bar directly enters a die, and is blanked and preformed; the preformed blank is annealed to be softened; after the blank receives intermediate treatment, cold precision forging is carried out; another unformed flat-bottomed hole of the cold precision forged blank is reamed; and subsequent treatment is carried out. The technique can guarantee the consistency of the shapes of finished products, and can ensure that the metal fibers of the Z type contacts can be continuously distributed according to the shape of the Z type contacts.
Description
Technical field
The present invention relates to the accurate cold forging technical field, be specifically related to a kind of whole accurate cold forging forming technology of the Z type fingertip that on high-voltage switch gear and arrester thereof, uses.
Background technology
The high-voltage switch gear of using in China's high voltage power transmission and transforming industry is very big because of its structural change of each side reason; Performance difference is also very big; The high-voltage switch gear performance of wherein introducing from Japanese Toshiba is the most stable, also has only a large amount of Z of employing type fingertips on the series high voltage switch of this introduction, also translates into contact shoe.Domestic used Z type fingertip all is from Japanese import basically at present, and it adopts the processing technology of forging the rear curved moulding.Because Z type fingertip material is a fine copper, the resilience meeting when copper is crooked causes the bigger variation of angle, near hole the additional deformation when crooked simultaneously can make and adjacent regions distortion, thus be difficult to guarantee Z type fingertip design shape and instructions for use.
Summary of the invention
Technical problem to be solved by this invention provides a kind of cold closed-die forging technology of this Z type fingertip; When satisfying finished parts shape high conformity; The metallic fiber that makes Z type fingertip is by its shape continuous distributed; Dense structure's hardness is high, makes electric conductivity, silver-plated performance and anti-plug tension hair performance all reach higher level.
For realizing the foregoing invention purpose, following technical scheme is adopted in the invention:
Z type fingertip cold closed-die forging technology of the present invention, comprise copper bar directly get into the preformed step of punch die blanking,
With preformed blank annealing softening processed steps, step, the step and the subsequent processing steps of reaming to carrying out cold closed-die forging after the blank intermediate treatment.
Be better implement the invention, the blanking of said copper bar and being preformed in the secondary mould is simultaneously accomplished.
Be better implement the invention, said annealing softening is handled and is meant that heating-up temperature is 600 °～700 ° C, insulation 1.5～3 h, come out of the stove air cooling or water-cooled.
Be better implement the invention, the annealing hardness of the preformed blank of handling through annealing softening reaches HB40～45.
Be better implement the invention, said the blank intermediate treatment comprised descale, deburring step and to the lubricated step of the cleaning of blank.
Be better implement the invention, in the said cold closed-die forging step, said finish forge spare only extrudes into a hole, and another hole extrudes into taper hole, and hole depth puts in place, and only the little inversed cone ring surplus with the aperture inscribe is stayed on the limit, hole.
Be better implement the invention, in the said cold closed-die forging step, the drift that extrudes taper hole adopts oval drift.
Be better implement the invention, in the said cold closed-die forging step, also comprise the step that the cold closed-die forging product is cut edge.
Be better implement the invention, the step of said reaming adopts countersinking bit to expand finish forge spare taper hole.
Be better implement the invention, said subsequent processing steps is the step to final products integral light decorations.
Owing to adopted technique scheme, the present invention to have following beneficial effect:
1, since the present invention to the blanking of copper bar be preformed in the secondary mould and accomplish simultaneously, material removal head does not almost have the blanking loss outward, thereby has saved raw material, has improved the utilization rate of material.
2, in blank cold closed-die forging final shaping unit process, extrude into a hole, another hole is extruded into conical bore, a small amount of surplus of Kong Bianyou, and this taper hole once expands on the reaming frock, has improved the processing work efficiency.
After the heating-up temperature when 3, handling through annealing softening and the regulation and control of temperature retention time, carry out the product of cold closed-die forging, can make blank dense structure hardness high, its electric conductivity, silver-plated performance and anti-plug tension hair performance all reach better level.
4, Z-shaped fingertip surface roughness behind cold closed-die forging is good, and shape meets drawing requirement fully, product surface hardness number HB >=80; The finished product accuracy uniformity improves, the raising in service life.
Description of drawings
Fig. 1 is the structural representation after the blank blanking preformed;
Fig. 2 is the structural representation of preformed blank behind the cold closed-die forging final shaping unit;
Fig. 3 is the structural representation of product behind the die-cut limit of essence behind the cold closed-die forging final shaping unit;
Fig. 4 is the structural representation after the moulding of Z type fingertip.
The specific embodiment
In conjunction with Fig. 1-Fig. 4, adopt the T2Y copper bar of 7mm * 10.5mm directly to get into punch die blanking preformed, i.e. blanking be preformed in completion simultaneously in the secondary mould.Preformed member through 600 °～700 ° C heating of temperature, is incubated 1.5～3 hours, come out of the stove air cooling or water-cooled; Handle through above-mentioned annealing softening, the annealing hardness of control preformed member is HB40～45.To in light polishing machine, polish defectives such as deburring and oxide skin through the preformed member that annealing softening is handled, and clean afterwards, clean and be coated with the zinc stearate powder lubricant after air-dry.The preformed member of the above-mentioned processing of process extrudes into a hole through cold precision forging in the whole forming process of cold closed-die forging, and another hole only is pressed into taper hole, and a small amount of surplus is stayed on its limit, hole.The reason of made allowance is that the axis in this hole and the angle of die joint are not suitable for direct forging molding.Forging stays the drift in reaming surplus hole to adopt oval drift, can prevent that drift from rotating to cause at the bottom of the hole unevenly, also helps forging and ejects.Cut the forging burr behind the cold closed-die forging and on the reaming frock, adopt countersinking bit that limit, hole surplus is removed.In light polishing machine, polish finished parts at last, according to the inspection eventually of size among the figure.
Claims (10)
1. Z type fingertip cold closed-die forging technology is characterized in that: comprise copper bar directly get into the preformed step of punch die blanking, with preformed blank annealing softening processed steps, step, the step and the subsequent processing steps of reaming to carrying out cold closed-die forging after the blank intermediate treatment.
2. Z type fingertip cold closed-die forging technology according to claim 1 is characterized in that: the blanking of said copper bar and being preformed in the secondary mould is simultaneously accomplished.
3. Z type fingertip cold closed-die forging technology according to claim 1 is characterized in that: said annealing softening is handled and is meant that heating-up temperature is 600 °～700 ° C, insulation 1.5～3 h, come out of the stove air cooling or water-cooled.
4. according to claim 1 or 3 described Z type fingertip cold closed-die forging technologies, it is characterized in that: the annealing hardness of the preformed blank of handling through annealing softening reaches HB40～45.
5. Z type fingertip cold closed-die forging technology according to claim 1 is characterized in that: said the blank intermediate treatment is comprised descale, deburring step and to the lubricated step of the cleaning of blank.
6. Z type fingertip cold closed-die forging technology according to claim 1, it is characterized in that: in the said cold closed-die forging step, said finish forge spare only extrudes into a hole, and another hole extrudes into taper hole, and hole depth puts in place, and only the little inversed cone ring surplus with the aperture inscribe is stayed on the limit, hole.
7. Z type fingertip cold closed-die forging technology according to claim 6, it is characterized in that: in the said cold closed-die forging step, the drift that extrudes taper hole adopts oval drift.
8. Z type fingertip cold closed-die forging technology according to claim 1 is characterized in that: in the said cold closed-die forging step, also comprise the step that the cold closed-die forging product is cut edge.
9. Z type fingertip cold closed-die forging technology according to claim 1 is characterized in that: the step of said reaming, adopt countersinking bit to expand finish forge spare taper hole.
10. Z type fingertip cold closed-die forging technology according to claim 1 is characterized in that: said subsequent processing steps is the step to final products integral light decorations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110246949 CN102319851B (en) | 2011-08-26 | 2011-08-26 | Cold precision forging technique for Z type contacts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110246949 CN102319851B (en) | 2011-08-26 | 2011-08-26 | Cold precision forging technique for Z type contacts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102319851A true CN102319851A (en) | 2012-01-18 |
| CN102319851B CN102319851B (en) | 2013-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110246949 Active CN102319851B (en) | 2011-08-26 | 2011-08-26 | Cold precision forging technique for Z type contacts |
Country Status (1)
| Country | Link |
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| CN (1) | CN102319851B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071748A (en) * | 2013-01-18 | 2013-05-01 | 洛阳秦汉冷锻有限公司 | Large-size moving contact precision forging technology and mold |
| CN104162614A (en) * | 2014-07-07 | 2014-11-26 | 河南科技大学 | Switch contact finger part forming method and matching forming die used in method |
| CN104353691A (en) * | 2014-10-29 | 2015-02-18 | 平高集团有限公司 | Z type sensing finger one-molded die for high-voltage switch |
| CN104384221A (en) * | 2014-10-29 | 2015-03-04 | 平高集团有限公司 | Z-type contact finger forming method for high-voltage switch |
| CN104399768A (en) * | 2014-10-29 | 2015-03-11 | 平高集团有限公司 | Z-shaped touch finger forming apparatus for high voltage switch, and its secondary forming die |
| CN107876679A (en) * | 2017-12-13 | 2018-04-06 | 洛阳秦汉精工股份有限公司 | A kind of conducting copper forming method and mould |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB988149A (en) * | 1960-09-13 | 1965-04-07 | Siemens Ag | A method of producing an electrical contact in the form of a rivet |
| CN201327778Y (en) * | 2008-12-04 | 2009-10-14 | 天水长城开关厂有限公司 | Z-shaped sensing finger for three-station switch |
-
2011
- 2011-08-26 CN CN 201110246949 patent/CN102319851B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB988149A (en) * | 1960-09-13 | 1965-04-07 | Siemens Ag | A method of producing an electrical contact in the form of a rivet |
| CN201327778Y (en) * | 2008-12-04 | 2009-10-14 | 天水长城开关厂有限公司 | Z-shaped sensing finger for three-station switch |
Non-Patent Citations (3)
| Title |
|---|
| 张振强等: "异形触指锻件成形工艺分析", 《热加工工艺》 * |
| 袁端磊等: "高压电器触指零件冷挤压成形工艺研究", 《热加工工艺》 * |
| 金仁钢等: "电器动触头零件冷挤压工艺及模具", 《模具工业》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071748A (en) * | 2013-01-18 | 2013-05-01 | 洛阳秦汉冷锻有限公司 | Large-size moving contact precision forging technology and mold |
| CN104162614A (en) * | 2014-07-07 | 2014-11-26 | 河南科技大学 | Switch contact finger part forming method and matching forming die used in method |
| CN104353691A (en) * | 2014-10-29 | 2015-02-18 | 平高集团有限公司 | Z type sensing finger one-molded die for high-voltage switch |
| CN104384221A (en) * | 2014-10-29 | 2015-03-04 | 平高集团有限公司 | Z-type contact finger forming method for high-voltage switch |
| CN104399768A (en) * | 2014-10-29 | 2015-03-11 | 平高集团有限公司 | Z-shaped touch finger forming apparatus for high voltage switch, and its secondary forming die |
| CN107876679A (en) * | 2017-12-13 | 2018-04-06 | 洛阳秦汉精工股份有限公司 | A kind of conducting copper forming method and mould |
| CN107876679B (en) * | 2017-12-13 | 2023-10-03 | 洛阳秦汉精工股份有限公司 | Conductive copper bar forming method and die |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102319851B (en) | 2013-08-21 |
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Address after: 471000 Henan Province, Luoyang high tech Development Zone along the path the torch Park A building room 517 Patentee after: LUOYANG QINHAN PRECISION INDUSTRIALS CO.,LTD. Address before: 471000 Henan city of Luoyang province high tech Zone on the north side of the Dragon Linlu drag technical school Patentee before: LUOYANG QINHAN COLD FORGING Co.,Ltd. |
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Denomination of invention: Cold precision forging technique for Z type contacts Effective date of registration: 20171219 Granted publication date: 20130821 Pledgee: Bank of China Limited by Share Ltd. Yiyang branch Pledgor: LUOYANG QINHAN PRECISION INDUSTRIALS CO.,LTD. Registration number: 2017990001188 |
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Date of cancellation: 20190130 Granted publication date: 20130821 Pledgee: Bank of China Limited by Share Ltd. Yiyang branch Pledgor: LUOYANG QINHAN PRECISION INDUSTRIALS CO.,LTD. Registration number: 2017990001188 |
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Denomination of invention: Cold precision forging technique for Z type contacts Effective date of registration: 20190130 Granted publication date: 20130821 Pledgee: Bank of China Limited by Share Ltd. Yiyang branch Pledgor: LUOYANG QINHAN PRECISION INDUSTRIALS CO.,LTD. Registration number: 2019990000104 |
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Date of cancellation: 20200409 Granted publication date: 20130821 Pledgee: Bank of China Limited by Share Ltd. Yiyang branch Pledgor: LUOYANG QINHAN PRECISION INDUSTRIALS Co.,Ltd. Registration number: 2019990000104 |
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Denomination of invention: Cold precision forging technique for Z type contacts Effective date of registration: 20200414 Granted publication date: 20130821 Pledgee: Bank of China Limited by Share Ltd. Luoyang branch Pledgor: LUOYANG QINHAN PRECISION INDUSTRIALS Co.,Ltd. Registration number: Y2020980001413 |
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Date of cancellation: 20210401 Granted publication date: 20130821 Pledgee: Bank of China Limited by Share Ltd. Luoyang branch Pledgor: LUOYANG QINHAN PRECISION INDUSTRIALS Co.,Ltd. Registration number: Y2020980001413 |
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Denomination of invention: A cold precision forging process for Z-type finger Effective date of registration: 20210407 Granted publication date: 20130821 Pledgee: Bank of China Limited by Share Ltd. Luoyang branch Pledgor: LUOYANG QINHAN PRECISION INDUSTRIALS Co.,Ltd. Registration number: Y2021980002471 |
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Date of cancellation: 20230413 Granted publication date: 20130821 Pledgee: Bank of China Limited by Share Ltd. Luoyang branch Pledgor: LUOYANG QINHAN PRECISION INDUSTRIALS CO.,LTD. Registration number: Y2021980002471 |