Research on shaping of burr less gear by cold extrusion through reducing after expansion workpiece diameter
| Project/Area Number |
20560104
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Production engineering/Processing studies
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| Research Institution | Shizuoka University |
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Principal Investigator |
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| Project Period (FY) |
2008 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2008: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 成形加工 / 冷間押出し / 平歯車 / はすば歯車 / 内歯車 / 鍛流線 / 押出し / 歯車 |
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| Research Abstract |
When extruding a gear while confining the outer diameter of the workpiece, burr-like irregularities occur on the end surface of the shaped form although the pressure(load) is low. When extruding a gear while expanding the inner diameter of the workpiece, the irregularities on the end surface become smaller but the load becomes greater. A shaping experiment was conducted in this study to take the respective advantages of the above two approaches by adopting a procedure of extrusion after expansion. The intention was to obtain a shaped form having small burr-like irregularities with a low load, and eventually produce gears using only a press line
First, it was found possible to form gears using the above method. The lower limit of cross sectional reduction in area to obtain a favorable gear was determined. The needed pressure of the punch, mandrel, and die is far below the strength of the punch, mandrel, and die materials. The burr-like irregularities on the end surface could be reduced in size compared with the two-step extrusion method, which has been proposed for gear shaping, but could not be eliminated completely
It was found that the irregularities could be rectified with a press machine because of their reduced size
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Report
(6 results)
Research Products
(78 results)
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[Presentation] 日本機械学会北陸信越支部講演会2011
Author(s)
吉田始, 坂井田喜久, 奥田康孝, 熊元隆弘, 矢代茂樹, 島田和彦
Organizer
二段充てん法による内歯車の成形
Place of Presentation
上田市 信州大学
Year and Date
2011-03-05
Related Report
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[Presentation] 二段充てん法による内歯車の成形2011
Author(s)
吉田始,坂井田喜久,奥田康孝,熊元隆弘,矢代茂樹,島田和彦
Organizer
日本機械学会北陸・信越支部総会講演会
Place of Presentation
長野県上田市,信州大学
Year and Date
2011-03-04
Related Report
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