ガス切断に関する二,三の実験(第5報)

• 水津 寛一

  川崎重工業株式会社造船工作部

• 安田 武夫

  川崎重工業株式会社造船工作部

書誌事項

タイトル別名

• Some Investigations Regarding Oxygen Cutting (Report 5)
• Effect of Preheat Variation on the Cutting Efficiency
• 切断効率におよぼす予熱の影響

抄録

By using specially made tips with varying numbers and pitch of circle diameter (P.C.D.) of preheating orifices, a cutting test was performed. The results of the cutting was compared on the basis of the maximum cut thickness that has been introduced by the authors as a convenient criterion for determining cutting ability.<BR>The cutting ability was found to increase with increasing numbers of preheating orifices surrounding the cutting orifice, if sufficient amount of acetylene gas is used, but the rate of increase in cutting ability decreases with increasing numbers of preheating orifices. The relation is expressed in the following formula :<BR>mf=(1-ε^-n+1/1.8)⋅m₀<BR>If insufficient acetylene gas is used, the cutting ability is below that given by the above formula, depending on the acetylene gas flow and P.C.D. of preheating orifices. The formula for this relation is expressed as follows :<BR>m=(1-ε^-a/F)⋅m_f<BR>where m, m_f=a degree of cutting ability proportional to the cutting efficiency<BR>m₀=the maximum of the above, being peculiar to a size of tip<BR>n=nos. of preheating orifices<BR>α=acetylene gas flow per one preheating orifice<BR>F=a constant depending on n, size of tip and P.C.D.<BR>ε=the base of natural logarithm<BR>From the results it was also found that many flames issuing from many preheating orifices are more efficient than a single flame of the same amount of acetylene gas.<BR>In addition, the direction of a preheating orifice relative to the cutting orifice has no great significance so far as no loss of cut happens. The effectiveness of propane gas is by no means less than that of acetylene, if preheating variables are properly chosen.

収録刊行物

• 溶接学会誌

  溶接学会誌 30 (10), 733-740, 1961

  一般社団法人 溶接学会

キーワード

• Metals and Alloys
• Surfaces, Coatings and Films
• Mechanical Engineering
• Mechanics of Materials

詳細情報

• CRID: 1390001206501801728
• NII論文ID: 130003762821
• DOI: 10.2207/qjjws1943.30.733
• ISSN: 18837204
• ISSN: 00214787
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可