CN210886150U - Be used for thermal treatment of overlength tube-shape sealed chamber part to preapring for an unfavorable turn of events shape auxiliary fixtures - Google Patents
Be used for thermal treatment of overlength tube-shape sealed chamber part to preapring for an unfavorable turn of events shape auxiliary fixtures Download PDFInfo
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- CN210886150U CN210886150U CN201921248463.4U CN201921248463U CN210886150U CN 210886150 U CN210886150 U CN 210886150U CN 201921248463 U CN201921248463 U CN 201921248463U CN 210886150 U CN210886150 U CN 210886150U
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- air duct
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- bolted connection
- connection head
- heat treatment
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Abstract
The utility model provides a be used for sealed chamber part thermal treatment of overlength tube-shape auxiliary fixtures of preapring for an unfavorable turn of events, including bolted connection head and air duct, bolted connection head is hollow structure, and one end is installed on part section of thick bamboo wall, and the other end is in the same place with air duct one end welding, and bolted connection head's external screw thread is connected with the fabrication hole cooperation on the part section of thick bamboo wall, and the air duct is arranged in the part outside and is bent into the L type, and the air duct height is higher than the liquid level height of oil when. The tool ensures that air can be smoothly discharged during heat treatment, and prevents the deformation of parts or the burst of cavities caused by the expansion and contraction of the air in the process of heating and quenching oil entering and rapid cooling.
Description
Technical Field
The application belongs to the heat treatment field, concretely relates to be used for sealed chamber part heat treatment of overlength tube-shape auxiliary fixtures of preapring for an unfavorable turn of events.
Background
The large aircraft landing gear actuator cylinder is used as a typical overlong cylinder-shaped sealed cavity welding part (the length is about 1200 mm), and a large aircraft assembly welded in the middle of the actuator cylinder after heat treatment is seriously deformed, is bulged and cannot be corrected. The part is a key part of an airplane landing gear, is a main body part of a main landing gear shock absorption strut, bears impact load when the airplane takes off and lands, and absorbs impact energy by compression of neutral gas (99.9 percent of nitrogen) and flowing friction of hydraulic oil passing through a hole wall of a plunger and a deformable gap between needle rods. The hydraulic oil flows from the annular groove between the actuating cylinder wall and the rod wall, passes through the gap on the ring in the shaft sleeve and the gap between the plunger and the needle rod, and flows through the throttling function of the lower inner cavity from the upper inner cavity to generate reverse blocking.
Disclosure of Invention
In order to solve the problems, the auxiliary tool is designed to ensure that air in the cavity can be smoothly discharged during heat treatment, and deformation of parts or burst of the cavity caused by expansion with heat and contraction with cold of the air in the process of heating and quenching oil inlet rapid cooling is prevented.
The technical scheme of the invention is as follows: the utility model provides a be used for thermal treatment of overlength tube-shape sealed chamber part to preapring for an unfavorable turn of events shape auxiliary fixtures, includes bolted connection head and air duct, and bolted connection head is hollow structure, and one end is installed on part section of thick bamboo wall, and the other end is in the same place with air duct one end welding, and the bolted connection head cavity is coaxial with the air duct cavity, and the external screw thread of bolted connection head is connected with the fabrication hole cooperation on the part section of thick bamboo wall, and the part outside is arranged in to the air duct and is bent into the L type, and the. The height of the air duct exceeds the height of the liquid level by more than 300 mm.
The invention has the advantages that: on one hand, liquid enters the cavity to cause follow-up difficulty in removal and corrode parts during quenching, on the other hand, because the expansion of the long cylinder of the welding part is far smaller than that of gas during heat treatment, the gas cannot be discharged from the cavity, extra expansion acting force is generated to enable the wall of the metal cavity to be remarkably expanded and exceed the metal expansion scale around the cavity, and macroscopically, the deformation phenomenon of bulging is generated.
Drawings
FIG. 1 is a schematic view of an auxiliary tool
FIG. 2 is a schematic view of a bolt joint
The numbering in the figures illustrates: 1-part, 2-fabrication hole, 3-gas guide tube and 4-bolt connector
Detailed Description
The embodiment shown in figure 1 is an ultra-long actuator cylinder part 1 and in order to eliminate the quenching "bulge" the gas in the cavity must be vented during quenching.
The auxiliary tool who uses, including bolted connection head 4 and air duct 3, bolted connection head 4 is hollow structure, and one end is installed on 1 section of thick bamboo wall of part, and the other end is in the same place with 3 one end welding of air duct, and 4 cavities of bolted connection head are coaxial with 3 cavities of air duct, and the external screw thread of bolted connection head 4 is connected with the fabrication hole cooperation on 1 section of thick bamboo wall of part, and air duct 3 arranges the 1 outside of part in and bends into the L type, and air duct 3 highly is higher than the liquid level height of oil when 1 height of part and 1 quenching. The height of the air duct 1 exceeds the height of the liquid level by more than 300 mm.
The gas is communicated with the outside by an auxiliary tool and is tightly connected by a bolt connector 4, and the guide pipe 3 is bent to form an L shape and is led into the upper part, and the oil inlet direction of the guide pipe is opposite to that of the part 1.
Claims (5)
1. The utility model provides a be used for thermal treatment of sealed chamber part of overlength tube-shape auxiliary fixtures of preapring for an unfavorable turn of events, its characterized in that includes bolted connection head and air duct, and bolted connection head is hollow structure, and one end is installed on the part section of thick bamboo wall, and the welding of other end air duct one end is in the same place, and the part outside is arranged in to the air duct, and the air duct height is higher than the liquid level height of part height and part oil.
2. The auxiliary tool for preventing deformation during heat treatment of the ultralong cylindrical sealing cavity part according to claim 1, wherein the cavity of the bolt connector is coaxial with the cavity of the air guide tube.
3. The auxiliary tool for preventing deformation during heat treatment of the ultralong cylindrical sealing cavity part according to claim 1, wherein the external thread of the bolt connector is matched and connected with the process hole in the wall of the part cylinder.
4. The auxiliary tool for preventing deformation during heat treatment of the ultralong cylindrical sealing cavity part according to claim 1, wherein the air guide pipe is bent into an L shape.
5. The auxiliary tool for preventing deformation during heat treatment of the ultralong cylindrical sealing cavity part according to claim 1, wherein the height of the air guide pipe exceeds the height of the liquid level by more than 300 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921248463.4U CN210886150U (en) | 2019-08-02 | 2019-08-02 | Be used for thermal treatment of overlength tube-shape sealed chamber part to preapring for an unfavorable turn of events shape auxiliary fixtures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921248463.4U CN210886150U (en) | 2019-08-02 | 2019-08-02 | Be used for thermal treatment of overlength tube-shape sealed chamber part to preapring for an unfavorable turn of events shape auxiliary fixtures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210886150U true CN210886150U (en) | 2020-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921248463.4U Active CN210886150U (en) | 2019-08-02 | 2019-08-02 | Be used for thermal treatment of overlength tube-shape sealed chamber part to preapring for an unfavorable turn of events shape auxiliary fixtures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210886150U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112391514A (en) * | 2020-12-10 | 2021-02-23 | 内蒙古航天红岗机械有限公司 | Thin-wall sealed barrel type quenching exhaust device |
-
2019
- 2019-08-02 CN CN201921248463.4U patent/CN210886150U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112391514A (en) * | 2020-12-10 | 2021-02-23 | 内蒙古航天红岗机械有限公司 | Thin-wall sealed barrel type quenching exhaust device |
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