229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 42.238000010438 heat treatment Methods 0.000 title claims abstract description 55.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by China Academy of Launch Vehicle Technology CALT, Aerospace Research Institute of Materials and Processing Technology filed Critical China Academy of Launch Vehicle Technology CALT Priority to CN201510494770.0A priority Critical patent/CN105039880B/en Publication of CN105039880A publication Critical patent/CN105039880A/en Application granted granted Critical Publication of CN105039880B publication Critical patent/CN105039880B/en Status Active legal-status Critical Current Anticipated expiration legal-status Critical Links Original Assignee China Academy of Launch Vehicle Technology CALT Aerospace Research Institute of Materials and Processing Technology Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)Ĭhina Academy of Launch Vehicle Technology CALTĪerospace Research Institute of Materials and Processing Technology ( en Inventor 赵磊 阴中炜 韩冬峰 张绪虎 丁俊峰 Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active Application number CN201510494770.0A Other languages Chinese ( zh) Google Patents Little ozzle, major diameter, the cylindricality aluminium alloy inner container heat treatment method of big L/D ratioĭownload PDF Info Publication number CN105039880B CN105039880B CN201510494770.0A CN201510494770A CN105039880B CN 105039880 B CN105039880 B CN 105039880B CN 201510494770 A CN201510494770 A CN 201510494770A CN 105039880 B CN105039880 B CN 105039880B Authority CN China Prior art keywords inner bag cylindricality heat treatment aluminium alloy ozzle Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents CN105039880B - Little ozzle, major diameter, the cylindricality aluminium alloy inner container heat treatment method of big L/D ratio At common working pressures of 60 to 100 psi, air can be injecting into the body with catastrophic results.CN105039880B - Little ozzle, major diameter, the cylindricality aluminium alloy inner container heat treatment method of big L/D ratio This should never be done because the air nozzle may contact the skin.
Misuse often continues when the operator cleans himself off using the compressed air. The air pressure can also bounce the material back at the air nozzle operator. Propelled by 90 psi air flow, the flying particles can injure someone many feet away.
The operator may feel compelled to clean a milling machine covered in metal shavings or a surface covered in cement dust, but a high-pressure air blast can make chips and debris travel at dangerous speeds. At the end of the shift, the operator connects the nozzle and blasts debris off the work area and his or her clothing. However, the pneumatic quick-disconnect fitting allows the operator to remove the grinder and attach a manually-operated air nozzle. For example, 90 psi factory air is provided to operate a handheld pneumatic grinder. There are many ways to misuse compressed air.
It doesn’t take much more air pressure than that to propel objects, metal chips or other debris through the air at hundreds of feet per second (Figure 1). A spitball shot through a straw can hit a teacher in the front of the class while propelled by the troublemaker with well under 2 psi of pressure. It doesn’t take much air pressure to create impressive debris velocities. Eye injuries are a common result of compressed air misuse.
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