CN109127845A - High-strength corrosion-resistant steel gas cylinder hot spinning forming method - Google Patents
High-strength corrosion-resistant steel gas cylinder hot spinning forming method Download PDFInfo
- Publication number
- CN109127845A CN109127845A CN201810873134.2A CN201810873134A CN109127845A CN 109127845 A CN109127845 A CN 109127845A CN 201810873134 A CN201810873134 A CN 201810873134A CN 109127845 A CN109127845 A CN 109127845A
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- China
- Prior art keywords
- steel pipe
- seamless steel
- plate mold
- gas cylinder
- spinning
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
- B21D51/44—Making closures, e.g. caps
Abstract
The invention discloses a kind of high-strength corrosion-resistant steel gas cylinder hot spinning forming methods, include the following steps, (a) the closing in section of seamless steel pipe is heated, heating temperature is 1180-1220 DEG C, and the relationship of heated length L and outer diameter of steel pipes φ are L=φ+(100-150mm)；(b) spinning machine main shaft claming seamless steel pipe, seamless steel pipe is rotated with the revolving speed of 25-29rad/s, by the working face of the plate mold of the spinning machine close to seamless steel pipe closing in section, with the slow rotary plate mold of 0.0015-0.0035rad/s revolving speed, 1/4 circle of plate mold rotation.The gas cylinder of the method for the present invention molding preparation, comprehensive performance is brilliant, successfully solves the contradiction between material superhigh intensity and high tenacity and corrosion resistance, the performance indicator of material occupies the leading level in the world.
Description
Technical field
The invention belongs to seamless gas cylinder processing technique fields, and in particular to high-strength corrosion-resistant steel gas cylinder hot spinning molding side
Method.
Background technique
Greatly developing the novel ship towards deep-sea even submarine, existing seamed high pressure gas cylinder for China cannot expire
Sufficient demand.Seamless gas cylinder overcomes in conventional cylinder, discontinuous, commissure the strength reduction of weld seam, the easy embrittlement of weld seam and answers
The problems such as power is concentrated greatly improves the air-tightness and pressure-resistant performance of gas cylinder.But the stress state that air bottle end socket position is born is multiple
Miscellaneous, the design feature at end socket position makes the position, and there is serious stress to concentrate, and reduces the service life of gas cylinder, gas cylinder
Safety and reliability it is poor.In the prior art, the end socket of gas cylinder is processed by way of rotary press modelling, after rotary press modelling
End socket inner surface fold it is more, influence the service life of gas cylinder.
Summary of the invention
It is an object of the invention to: deficiency in the prior art is solved, a kind of high-strength corrosion-resistant steel gas cylinder hot spinning is provided
Forming method, the gas cylinder yield strength are more than 980MPa, light weight, and sea water corrosion resistant is excellent.
To achieve the goals above, the technical solution adopted by the present invention are as follows: a kind of high-strength corrosion-resistant steel gas cylinder hot spinning at
Type method, includes the following steps,
(a) the closing in section of seamless steel pipe is heated, heating temperature is 1180-1220 DEG C, heated length L and outer diameter of steel pipes φ's
Relationship is L=φ+(100-150mm)；
(b) spinning machine main shaft claming seamless steel pipe rotates seamless steel pipe with the revolving speed of 25-29rad/s, by the spinning machine
Plate mold working face close to seamless steel pipe closing in section, with the slow rotary plate mould of 0.0015-0.0035rad/s revolving speed
Tool, 1/4 circle of plate mold rotation.
Further, in the step (b), in the molding of rotary plate mold, using welding torch to closing in section concurrent heating, institute
The oxygen pressure value for stating welding torch is 0.8Mpa, reduces its cooling rate.
Further, the center of the plate mold is 40mm at a distance from the spinning machine main shaft.
By adopting the above-described technical solution, the beneficial effects of the present invention are:
1. in forming method of the invention, carrying out spinning using closing in section of the rotary plate mold to seamless steel pipe, only needing
Board-like template is rotated into a quarter circle, product can be obtained after a spinning, with roller type spinning phase in the prior art
Than roller type spinning need to be formed by multi-pass, and operating process is complicated, and in forming method of the invention, plate mold only needs
Molding can be completed in rotation a quarter circle, easy to operate.
2. in forming method of the invention, compared with roller type spinning in the prior art, board-like spinning is steady, controlled
Journey is simple, and plate mold prepares simple, and manufacturing cost can be greatly lowered.
3. in the bright forming method of we, the gas cylinder prepared using method of the invention, the inner wall of the bottleneck of end socket
It is sharp spherical, the defects of bottleneck internal wall transitions are smooth, corrugationless, free from flaw.
4. the use of gas cylinder yield strength prepared by method of the invention being more than 980MPa, matter in the bright forming method of we
Amount is light；And sea water corrosion resistant is excellent.
Specific embodiment
Embodiment 1: a kind of high-strength corrosion-resistant steel gas cylinder hot spinning forming method includes the following steps,
(a) first by empty stove heating to 1100 DEG C, then the closing in section of seamless steel pipe is placed in heating furnace and is heated, heat nothing
The closing in section of steel pipe is stitched, heating temperature is 1100 DEG C, and keeps the temperature 10 minutes at 1100 DEG C, keeps the internal and external temperature of seamless steel pipe equal
Even, the relationship of heated length L and outer diameter of steel pipes φ are L=φ+(100-150mm)；
(b) it discharges, one end of the seamless steel pipe after heating is fixed on spinning machine main shaft, spinning machine main shaft claw clamps
Seamless steel pipe, discharging to the time clamped are no more than 45 seconds, seamless steel pipe are rotated with the revolving speed of 25-29rad/s, by the spinning
The working face of the plate mold of machine is close to the other end of seamless steel pipe, i.e. closing in section, the shaft axis and spinning machine of plate mold
Main shaft axis distance be 40mm, seamless steel pipe rotation while, plate mold is around its axis with 0.0015-
The slow rotary plate mold of 0.0035rad/s revolving speed, spinning seamless steel pipe, during spinning, using welding torch to seamless steel
Processing sections carry out concurrent heating, the oxygen pressure value of welding torch is 0.8Mpa, and when 1/4 circle of plate mold rotation, i.e., plate mold is around it
Shaft is rotated by 90 °, and is completed the processing of the end socket of one end, is repeated the above steps, and is processed to the other end of no steel pipe.
In the present embodiment, when seamless steel pipe start deformation when, the contact zone of seamless steel pipe and plate mold etc. effects
Change, stress, temperature highest；Mold continues to rotate, and diameter is substantially reduced at workpiece bottle neck, generates a large amount of plastic deformations, at this time bottle
Equivalent strain, stress at mouth, maximum temperature, followed by molded area；After bottle neck is formed, mold backhaul spinning, bottle neck is
Free end, equivalent strain, stress gradually discharge, and temperature gradually decreases, and bottleneck is in contact with mold at this time, flow of metal
Degree is larger, bottleneck its equivalent strain, stress, maximum temperature；With the reduction of contact area, bottleneck equivalent stress is answered
Become, temperature is gradually reduced；Finally, equivalent stress, strain level off to zero at the end of molding；In the necking stage, the flow direction of metal with
Based on circumferential Plastic Flow, supplemented by axial Plastic Flow；In bottleneck formative stage, deformation be changed to be with axial Plastic Flow
It is main, supplemented by circumferential Plastic Flow.The bottleneck of the gas cylinder of machine-shaping is spherical in point, and surface is smooth.
Embodiment 2:(a) first by empty stove heating to 1160 DEG C, then the closing in section of seamless steel pipe is placed in heating furnace and is added
Heat heats the closing in section of seamless steel pipe, and heating temperature is 1160 DEG C, and keeps the temperature 10 minutes at 1160 DEG C, makes the interior of seamless steel pipe
Outer temperature is uniform, heated length 600mm,
(b) it discharges, one end of the seamless steel pipe after heating is fixed on spinning machine main shaft, spinning machine main shaft claw clamps
Seamless steel pipe, discharging to the time clamped are no more than 45 seconds, seamless steel pipe are rotated with the revolving speed of 25-29rad/s, by the spinning
The working face of the plate mold of machine is close to the other end of seamless steel pipe, i.e. closing in section, the shaft axis and spinning machine of plate mold
Main shaft axis distance be 40mm, seamless steel pipe rotation while, plate mold is around its axis with 0.0015-
The slow rotary plate mold of 0.0035rad/s revolving speed, spinning seamless steel pipe, during spinning, using welding torch to seamless steel
Processing sections carry out concurrent heating, the oxygen pressure value of welding torch is 0.8Mpa, and when 1/4 circle of plate mold rotation, i.e., plate mold is around it
Shaft is rotated by 90 °, and is completed the processing of the end socket of one end, is repeated the above steps, and is processed to the other end of no steel pipe.
Embodiment 3:(a) first by empty stove heating to 1180 DEG C, then the closing in section of seamless steel pipe is placed in heating furnace and is added
Heat heats the closing in section of seamless steel pipe, and heating temperature is 1180 DEG C, and keeps the temperature 10 minutes at 1180 DEG C, makes the interior of seamless steel pipe
Outer temperature is uniform, heated length 600mm,
(b) it discharges, one end of the seamless steel pipe after heating is fixed on spinning machine main shaft, spinning machine main shaft claw clamps
Seamless steel pipe, discharging to the time clamped are no more than 45 seconds, seamless steel pipe are rotated with the revolving speed of 25-29rad/s, by the spinning
The working face of the plate mold of machine is close to the other end of seamless steel pipe, i.e. closing in section, the shaft axis and spinning machine of plate mold
Main shaft axis distance be 40mm, seamless steel pipe rotation while, plate mold is around its axis with 0.0015-
The slow rotary plate mold of 0.0035rad/s revolving speed, spinning seamless steel pipe, during spinning, using welding torch to seamless steel
Processing sections carry out concurrent heating, the oxygen pressure value of welding torch is 0.8Mpa, and when 1/4 circle of plate mold rotation, i.e., plate mold is around it
Shaft is rotated by 90 °, and is completed the processing of the end socket of one end, is repeated the above steps, and is processed to the other end of no steel pipe.
Embodiment 4:(a) first by empty stove heating to 1200 DEG C, then the closing in section of seamless steel pipe is placed in heating furnace and is added
Heat heats the closing in section of seamless steel pipe, and heating temperature is 1200 DEG C, and keeps the temperature 10 minutes at 1200 DEG C, makes the interior of seamless steel pipe
Outer temperature is uniform, heated length 600mm,
(b) it discharges, one end of the seamless steel pipe after heating is fixed on spinning machine main shaft, spinning machine main shaft claw clamps
Seamless steel pipe, discharging to the time clamped are no more than 45 seconds, seamless steel pipe are rotated with the revolving speed of 25-29rad/s, by the spinning
The working face of the plate mold of machine is close to the other end of seamless steel pipe, i.e. closing in section, the shaft axis and spinning machine of plate mold
Main shaft axis distance be 40mm, seamless steel pipe rotation while, plate mold is around its axis with 0.0015-
The slow rotary plate mold of 0.0035rad/s revolving speed, spinning seamless steel pipe, during spinning, using welding torch to seamless steel
Processing sections carry out concurrent heating, the oxygen pressure value of welding torch is 0.8Mpa, and when 1/4 circle of plate mold rotation, i.e., plate mold is around it
Shaft is rotated by 90 °, and is completed the processing of one end, is repeated the above steps, and is processed to the other end of no steel pipe.
Embodiment 5:(a) first by empty stove heating to 1220 DEG C, then the closing in section of seamless steel pipe is placed in heating furnace and is added
Heat heats the closing in section of seamless steel pipe, and heating temperature is 1220 DEG C, and keeps the temperature 10 minutes at 1220 DEG C, makes the interior of seamless steel pipe
Outer temperature is uniform, heated length 600mm,
(b) it discharges, one end of the seamless steel pipe after heating is fixed on spinning machine main shaft, spinning machine main shaft claw clamps
Seamless steel pipe, discharging to the time clamped are no more than 45 seconds, seamless steel pipe are rotated with the revolving speed of 25-29rad/s, by the spinning
The working face of the plate mold of machine is close to the other end of seamless steel pipe, i.e. closing in section, the shaft axis and spinning machine of plate mold
Main shaft axis distance be 40mm, seamless steel pipe rotation while, plate mold is around its axis with 0.0015-
The slow rotary plate mold of 0.0035rad/s revolving speed, spinning seamless steel pipe, during spinning, using welding torch to seamless steel
Processing sections carry out concurrent heating, the oxygen pressure value of welding torch is 0.8Mpa, and when 1/4 circle of plate mold rotation, i.e., plate mold is around it
Shaft is rotated by 90 °, and is completed the processing of one end, is repeated the above steps, and is processed to the other end of no steel pipe.
Embodiment 6:(a) first by empty stove heating to 1240 DEG C, then the closing in section of seamless steel pipe is placed in heating furnace and is added
Heat heats the closing in section of seamless steel pipe, and heating temperature is 1240 DEG C, and keeps the temperature 10 minutes at 1240 DEG C, makes the interior of seamless steel pipe
Outer temperature is uniform, heated length 640mm,
(b) it discharges, one end of the seamless steel pipe after heating is fixed on spinning machine main shaft, spinning machine main shaft claw clamps
Seamless steel pipe, discharging to the time clamped are no more than 45 seconds, seamless steel pipe are rotated with the revolving speed of 25-29rad/s, by the spinning
The working face of the plate mold of machine is close to the other end of seamless steel pipe, i.e. closing in section, the shaft axis and spinning machine of plate mold
Main shaft axis distance be 40mm, seamless steel pipe rotation while, plate mold is around its axis with 0.0015-
The slow rotary plate mold of 0.0035rad/s revolving speed, spinning seamless steel pipe, during spinning, using welding torch to seamless steel
Processing sections carry out concurrent heating, the oxygen pressure value of welding torch is 0.8Mpa, and when 1/4 circle of plate mold rotation, i.e., plate mold is around it
Shaft is rotated by 90 °, and is completed the processing of one end, is repeated the above steps, and is processed to the other end of no steel pipe.
To it is above-mentioned be embodiment 1-6 preparation gas cylinder end socket inner surface macroscopic analysis, wherein the shoulder quality of end socket
It is examined using range estimation, the inner surface of end socket is examined using range estimation, and bottle neck penetrating inspection, the results are shown in Table 1:
To the mechanics property analysis of the end socket of upper embodiment 1-6, the style that diameter is 5mm is chosen in bottleneck, as drawing
Style is stretched, is stretched in style, selection standard V-arrangement 10 × 10 × 55mm style, as impact style, the impact of test sample is tough
Property；The selected directions of style are divided into: along gas cylinder axially along gas cylinder radial direction, i.e., testing the mechanical property of bottleneck axially and radially respectively
Can, result is as shown in Table 2-4,
Table 2: at normal temperature, to the stretch test result of axial sample
Table 3: at normal temperature, to the stretch test result of radial sample
Table 4: at -50 DEG C, respectively to the result of the impact test of radial and axial sample
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | |
| It is axial | 130J | 131J | 132J | 133J | 129J | 130J |
| It is radial | 158J | 157J | 160J | 155J | 158J | 162J |
12000,15000 and 100000 fatigue tests are carried out respectively to the gas cylinder of the present embodiment 1-6 preparation, not
There is any infiltration, leakage phenomenon.
The gas cylinder of forming method preparation of the invention, high-quality, the one-pass molding of end socket, do not need multi-pass spinning at
Type, forming process is simple, and the end socket inner wall of gas cylinder is at sharp spherical, the defects of being less prone to crackle, fold, peeling of gas cylinder.Together
When, which not only has high intensity, but also has good plasticity and toughness, while also possessing excellent corrosion resistance, integrates
Performance is brilliant, successfully solves the contradiction between material superhigh intensity and high tenacity and corrosion resistance, and the performance indicator of material occupies
The leading level in the world.
Claims (4)
1. high-strength corrosion-resistant steel gas cylinder hot spinning forming method, includes the following steps,
(a) the closing in section of seamless steel pipe is heated in gas-electric stove, heating temperature is 1180-1220 DEG C, outside heated length L and steel pipe
The relationship of diameter φ is L=φ+(100-150mm)；
(b) board-like spinning: the seamless steel pipe after the above-mentioned heating of spinning machine main shaft claming, it is seamless with the revolving speed rotation of 25-29rad/s
Steel pipe is turned by the working face of the plate mold of the spinning machine close to seamless steel pipe closing in section with 0.0015-0.0035rad/s
Fast slowly rotary plate mold, 1/4 circle of plate mold rotation.
2. high-strength stainless steel gas cylinder hot spinning forming method according to claim 1, it is characterised in that: in the step
(b) in, in the molding of rotary plate mold, using welding torch to closing in section concurrent heating, the oxygen pressure value of the welding torch is 0.8Mpa.
3. high-strength stainless steel gas cylinder hot spinning forming method according to claim 1, it is characterised in that: the board-like mould
The center of tool is 40mm at a distance from the spinning machine main shaft.
4. high-strength stainless steel gas cylinder hot spinning forming method according to claim 1, it is characterised in that: described is seamless
Tube material is the high-strength corrosion-resistant steel that yield strength is greater than 980Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810873134.2A CN109127845A (en) | 2018-08-02 | 2018-08-02 | High-strength corrosion-resistant steel gas cylinder hot spinning forming method |
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| CN201810873134.2A CN109127845A (en) | 2018-08-02 | 2018-08-02 | High-strength corrosion-resistant steel gas cylinder hot spinning forming method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109926507A (en) * | 2019-03-26 | 2019-06-25 | 浙江超力防火设备有限公司 | A kind of steel bottle head molding machine and its technique |
| CN112157159A (en) * | 2020-09-21 | 2021-01-01 | 新兴能源装备股份有限公司 | Gas cylinder spinning process method |
| CN114147131A (en) * | 2022-02-10 | 2022-03-08 | 四川大学 | Homogenizing hot spinning forming method for large-diameter high-pressure gas cylinder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109926507A (en) * | 2019-03-26 | 2019-06-25 | 浙江超力防火设备有限公司 | A kind of steel bottle head molding machine and its technique |
| CN112157159A (en) * | 2020-09-21 | 2021-01-01 | 新兴能源装备股份有限公司 | Gas cylinder spinning process method |
| CN112157159B (en) * | 2020-09-21 | 2022-07-12 | 新兴能源装备股份有限公司 | Gas cylinder spinning process method |
| CN114147131A (en) * | 2022-02-10 | 2022-03-08 | 四川大学 | Homogenizing hot spinning forming method for large-diameter high-pressure gas cylinder |
| CN114147131B (en) * | 2022-02-10 | 2022-04-29 | 四川大学 | Homogenizing hot spinning forming method for large-diameter high-pressure gas cylinder |
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