Transactions of Materials and Heat Treatment

Title：Issues and improvement measures of hydropneumatic hammers

Authors： HU Da-yong1 WU Kai-ming2 LV Guo-zhi3(1.School of Mechanical and Vehicular Engineering Beijing Institute of Technology Beijing 100081 China 2.Forging Plant Baoji Oilfield Machinery Co. Ltd. Baoji 721000 China 3.Laiwu Ningyuan Forging Equipment New Techniqu

Unit：

KeyWords： hydro-pneumatic hammer electro-hydraulic hammer controlling valve

ClassificationCode：TG315.33

year,vol(issue):pagenumber：2009,34(5):96-99

Abstract：

The working principles of the whole system and controlling valves of the hydro-pneumatic hammer,driven by single hammer rod with oil discharge and liquid filling were introduced.The shortcomings of the designing principle and structure of the hammer,including gas-oil crossing,heating from valves leakage,unexpected hammering phenomenon and hydraulic impact were analyzed,and then some measures for improvement were proposed.The practice shows that the full hydraulic electro-hydraulic hammer can meet the process requirement for both die forging hammers and free forging hammers,and overcome the shortcomings of the hydro-pneumatic hammer completely.It is the inevitable upgrade product as the hydro-pneumatic hammer.

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Reference：

[1]高乃光.锻锤[M].北京:机械工业出版社,1987.
[2]李永堂.锻压设备理论与控制[M].北京:国防工业出版社,2005.
[3]吉明.锻锤[M].北京:中国工业出版社,1961.

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