CN105728576A - Double-rotation wheel hot spinning necking method for large-diameter seamless gas cylinder - Google Patents
Double-rotation wheel hot spinning necking method for large-diameter seamless gas cylinder Download PDFInfo
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- CN105728576A CN105728576A CN201610110236.XA CN201610110236A CN105728576A CN 105728576 A CN105728576 A CN 105728576A CN 201610110236 A CN201610110236 A CN 201610110236A CN 105728576 A CN105728576 A CN 105728576A
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- spinning
- steel pipe
- spinning roller
- roller
- seamless steel
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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
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/04—Reducing; Closing
-
- 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
-
- 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
Abstract
The invention discloses a double-rotation wheel hot spinning necking method for a large-diameter seamless gas cylinder and relates to the technical field of metal formation. According to the double-rotation wheel hot spinning necking method, by sequentially carrying out processes including steel tube heating, hemisphere sealing head spinning, bottle mouth formation spinning and sealing head surface finishing spinning, the seamless gas cylinder with larger diameter and larger thickness can be produced, and in addition, double-wheel spinning reduces the spinning time and lowers the production cost.
Description
Technical field
The present invention relates to metal-forming techniques field, be specifically related to the hemispherical head of seamless gas cylinder and the forming technology of bottleneck.
Technical background
Long-tube trailer steel bottle filled with compressed natural gas and station gas storage cylinder are generally adopted hot rolling (or cold-drawn) seamless steel pipe hot spinning becomes hemispherical nose end socket and bottleneck.
The maximum outside diameter of existing long-tube trailer steel bottle filled with compressed natural gas and station gas storage cylinder is Φ 720mm, and along with the development of seamless steel pipe manufacturing technology and being gradually increased of natural gas motorcar, the application of the gas cylinder of bigger volume will have wide market prospect.
At present, seamless gas cylinder hot spinning harvest shape adopts single spinning roller swing arm spin-on process, rotary pressure technology also comparative maturity, but maximum gas cylinder external diameter not yet breaks through Φ 720mm, and is used for spinning thin-wall steel tube.
Equal material and the seamless steel gas cylinder under identical pressure condition, the wall thickness of the more big then gas cylinder of its external diameter is more thick, and the deflection of hemispherical head is more big, and the process specifications of hot spinning is more high.
Summary of the invention
It is an object of the invention to overcome the blank of bigger external diameter seamless steel gas cylinder hot spinning technology, a kind of major diameter seamless steel gas cylinder two-wheel hot-spinning reducing method is provided, it is possible not only to produce larger diameter, the seamless gas cylinder of bigger wall thickness, and two-wheel spinning decreases the spinning time, reduces production cost.
For achieving the above object, big external diameter seamless steel gas cylinder double rotary wheel hot-spinning reducing method provided by the invention, comprise the following steps:
1) steel pipe heating: seamless steel pipe around the velocity of rotation of self main shaft be 10～20rpm when, the closing in section of seamless steel pipe is heated to 1175～1225 DEG C；
2) hemispherical head spinning: the closing in section temperature keeping seamless steel pipe is 1175～1225 DEG C, seamless steel pipe around the velocity of rotation of self main shaft be 150～200rpm when, spinning roller and rear spinning roller formed rotary pressed head outside the closing in section of seamless steel pipe in the past, and spinning track is semicircle；In spinning process, front spinning roller and rear spinning roller are alternately performed spinning operation, and when front spinning roller performs semicircle track, rear spinning roller waits in the rotation position of rising of its lower a time；Front Roller locus is finished the contacting of backed off after random and seamless steel pipe, and is then back to the spinning original position of lower a time, and after simultaneously, spinning roller brings into operation spinning track, completes the spinning of the second passage；So carry out 3～4 passages；
3) bottleneck shapes spinning: the closing in section temperature keeping seamless steel pipe is 1175～1225 DEG C, seamless steel pipe around the velocity of rotation of self main shaft be 150～200rpm when, spinning roller and rear spinning roller carried out bottleneck shaping spinning outside the closing in section of steel pipe in the past, and spinning track is the straight line that first semicircle tailing edge steel pipe is axially in parallel；Front spinning roller and rear spinning roller replace feeding, have performed semicircle track tailing edge steel pipe and have axially continued executing with one section of straight path, have adopted arc transition between semicircle track and straight path；Along with the carrying out of spinning pass, this transition arc is gradually decrease to the transition arc angle of finished product gas cylinder, and the length of straight path is gradually increased to the bottleneck of gas cylinder needs length；So repeatedly perform 5～6 passages；
4) end socket surface finishing spinning: keep seamless steel pipe closing in section temperature be 1175～1225 DEG C, seamless steel pipe around the velocity of rotation of self main shaft be 150～200rpm when, to end socket surface finishing spinning.The spinning roller running orbit identical with front a time is adopted to carry out spinning so that whole hemispherical head and bottleneck smooth surface, thus completing the hot-spinning reducing of seamless gas cylinder.
The present invention adopts the closing in that double rotary wheel hot-spinning reducing method carries out seamless gas cylinder to shape, and compared with single spinning roller swing arm spinning, has the effect that
1, the hot spinning manufacturing process of the seamless steel gas cylinder of external diameter bigger (maximum outside diameter 950mm) and wall thickness thicker (thickest 45mm) has been invented；
2, in spinning process, bottle mouth of gas cylinder is not shut, it is to avoid that causes because the fused defect of metal is defective, improves lumber recovery.
3, two-wheel spinning is compared single spinning roller spinning and has been saved the spinning time, reduces production cost.
Further, in step 1) of the present invention, heating blind area according to the molding length after gas cylinder spinning and intermediate-frequency heating furnace, in conjunction with conventional spinning experience, the relation of the heated length L of the closing in section of seamless steel pipe and seamless steel pipe external diameter Φ is: L=Φ/2+(220～320mm).
Described step 2) in, because of seamless steel pipe high speed rotating in spinning process, bigger temperature will be caused to drop, therefore adopt and automatically mend temperature rifle and carry out the closing in section of seamless steel pipe mending temperature, to reach better spinning effect.
Described step 2) in, two spinning roller alternate runs in spinning process, for effectively distinguishing two spinning rollers, the existing spinning roller by odd-numbered pass operation is defined as front spinning roller, and the spinning roller that even-numbered pass is run is defined as rear spinning roller.
Described step 2) in, according to the feature deforming total length and Roller locus required for mould pressing, in conjunction with in type spinning experience, taking the spinning roller amount of feeding corresponding to the first passage sealing spinning is that the 340～380mm(i.e. transversely deforming length of the first passage steel pipe is for from pipe end 340～380mm), second passage sealing spinning roller lateral feed corresponding to spinning is that the 40～60mm(i.e. spinning roller of the second passage plays the spinning roller of rotation point distance the first passage to play the lateral separation of rotation point be 40～60mm), spinning roller lateral feed corresponding to spinning of each passage sealing below successively decreases 5～10mm each time.
In described step 3), according to the feature deforming total length and Roller locus required for mould pressing, in conjunction with in type spinning experience, taking every time spinning roller at the lateral feed of seamless steel pipe closing in section is 30～45mm, and every time 5～10mm that successively decreases.
Every time lateral feed of described front spinning roller or rear spinning roller, the amount of feeding of the first passage refers to the initial spinning point length value to Steel pipe end surface of spinning roller, and the amount of feeding of all the other each passages refers to that the initial spinning point of spinning roller of this passage is to the initial spinning point of upper a time spinning roller along the distance value of steel pipe transverse.
Described front spinning roller or rear spinning roller, according to the overall dimensions of gas cylinder and rotary press modelling result, selected spinning roller width B=120 ± 0.1mm, the radius of corner R1=30 of work surface side～45mm, the radius of corner R2=10 of non-working surface side～20mm.
Described step 2), 3), 4) in the track that performs carry out horizontal and vertical feeding formation respectively by two horizontal and vertical oil cylinders simultaneously, wherein transverse movement is actively, lengthwise movement is the linkage that PLC program controls, and transverse movement is uniform motion, and lengthwise movement is variable motion.
Described step 2), 3), 4) in perform the starting point coordinate of track and terminating point coordinate is measured by displacement transducer, and feed back in PLC program, the coordinate figure of start, end all can set in procedure operation cross section.
Accompanying drawing explanation
Fig. 1 is the view adopting Dual-wheel spinning machine that steel pipe carries out hot-spinning reducing processing.
Fig. 2 is the structure for amplifying schematic diagram of spinning roller in Fig. 1.
Fig. 3 is that in Fig. 1, steel pipe completes the structural representation of the section of closing in after hemispherical head spinning.
Fig. 4, Fig. 5 are the view that steel pipe closing in section bottleneck shapes spinning difference passage.
Fig. 6 is the structural representation after gas cylinder mouth reducing completes.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail, and following example are explanation of the invention and the invention is not limited in following instance.
As shown in Figure 1, implement the spinning machine of the inventive method by clamping 1, main shaft claw 2, spinning roller 4, rotary wheel base 5, traverse feed system 8 and longitudinal feed system 7 form, main shaft claw 2 clamps the outer wall of seamless steel pipe 3, meanwhile, under the cooperation of hydraulic system 6, it is arranged on the spinning roller 4 on rotary wheel base 5 under the promotion of traverse feed system 8 and longitudinal feed system 7, by the shape track set, steel pipe 3 can be carried out spinning closing-in.
As in figure 2 it is shown, the structural parameters of front spinning roller and rear spinning roller are: spinning roller width B=120 ± 0.1mm, the radius of corner R1=45mm of work surface side, the radius of corner R2=15mm of non-working surface side.
For Φ 914*24mm6500L long-tube trailer seamless gas cylinder, adopting the CP950 type cnc spinning machine of Yangzhou Chengde Steel Tube Co., Ltd.'s independent research, spinning closing-in technology is as follows:
1) steel pipe heating: steel pipe is sent into after spinning machine main jaw 2 clamps, intermediate-frequency heating furnace is goed deep into steel tube end part and is heated to 1200 DEG C, heated length L=650mm.
2) rotary pressed head: open benefit temperature rifle automatically and steel pipe 3 section of closing in is carried out concurrent heating, the main shaft claw 2 of spinning machine clamps outer wall of steel pipe, it is made to rotate with the speed of mainshaft of 160rpm, before simultaneously spinning roller according to the track initial point set near steel pipe 3 section of closing in outer wall, perform the first passage spinning track, after being finished, front spinning roller can away from steel pipe and to return to the track execution starting point of lower a time more than the speed advanced for track, and after simultaneously, spinning roller performs the spinning track of the second passage according to setting track；Steel pipe 3 is alternately carried out 3 passage hemispherical head spinning by forward and backward spinning roller, the track initial point of every time spinning roller compares the track initial point of front a time can along the steel pipe section of closing in outer wall axially inwardly feeding-Z(passage N1～N3 technological parameter in Table 1), after having performed 3 passages, steel pipe head is not shut, and steel pipe deformation in N1～N3 passage rotary pressed head is as shown in Figure 3.
3) bottleneck shapes spinning: continue to keep that concurrent heating state and the spinning machine speed of mainshaft of steel pipe 3 section of closing in is constant, before, rear spinning roller continues to be alternately performed 7 passage spinning tracks, the track initial point of every time spinning roller compares the track initial point of front a time can along the steel pipe section of closing in outer wall axially inwardly feeding-Z, with seal head forming spinning the difference is that, bottleneck shapes spinning and may proceed to perform one section of straight path after having performed semicircle track, by the arc transition of radius R between semicircle track and straight path, the round and smooth R of transition is gradually reduced, straight path length L is gradually increased (passage N4～N10 technological parameter is in Table 1).
4) end socket surface finishing spinning: continue to keep that concurrent heating state and spinning machine main shaft 1 rotating speed of steel pipe closing in section is constant, the traverse feed speed reducing spinning roller is 150mm/min, spinning roller is after steel pipe closing in section outer wall axially inwardly feeding 3mm, the spinning of last passage is carried out according to the track set, make whole hemispherical head and bottleneck smooth surface, thus completing the hot-spinning reducing (passage N11 technological parameter is in Table 1) of seamless gas cylinder.
Table 1: Φ 914 × 22.5 seamless steel gas cylinder hot-spinning reducing passage and process parameter table
| Spinning pass | N1 | N2 | N3 | N4 | N5 | N6 | N7 | N8 | N9 | N10 | N11 |
| The amount of feeding-Z (mm) | 370 | 50 | 45 | 40 | 35 | 30 | 25 | 15 | 8 | 5 | 2 |
| Traverse feed speed (mm/min) | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 150 |
| Transition arc R (mm) | — | — | — | 220 | 220 | 220 | 200 | 180 | 150 | 120 | 100 |
| Straight path length M(mm) | 10 | 10 | 10 | 60 | 120 | 150 | 180 | 200 | 220 | 240 | 240 |
Embodiment 1 gained closing in end socket bottleneck carrying out Liquid penetrant testing qualified, bottleneck external diameter, internal diameter and significant degree all meet the requirements.
Claims (8)
1. major diameter seamless steel gas cylinder double rotary wheel spinning closing-in method, it is characterised in that comprise the steps:
1) steel pipe heating: seamless steel pipe around the velocity of rotation of self main shaft be 10～20rpm when, the closing in section of seamless steel pipe is heated to 1175～1225 DEG C；
2) hemispherical head spinning: the closing in section temperature keeping seamless steel pipe is 1175～1225 DEG C, seamless steel pipe around the velocity of rotation of self main shaft be 150～200rpm when, spinning roller and rear spinning roller formed rotary pressed head outside the closing in section of seamless steel pipe in the past, and spinning track is semicircle；In spinning process, front spinning roller and rear spinning roller are alternately performed spinning operation, and when front spinning roller performs semicircle track, rear spinning roller waits in the rotation position of rising of its lower a time；Front Roller locus is finished the contacting of backed off after random and seamless steel pipe, and is then back to the spinning original position of lower a time, and after simultaneously, spinning roller brings into operation spinning track, completes the spinning of the second passage；So carry out 3～4 passages；
3) bottleneck shapes spinning: the closing in section temperature keeping seamless steel pipe is 1175～1225 DEG C, seamless steel pipe around the velocity of rotation of self main shaft be 150～200rpm when, spinning roller and rear spinning roller carried out bottleneck shaping spinning outside the closing in section of steel pipe in the past, and spinning track is the straight line that first semicircle tailing edge steel pipe is axially in parallel；Front spinning roller and rear spinning roller replace feeding, have performed semicircle track tailing edge steel pipe and have axially continued executing with one section of straight path, have adopted arc transition between semicircle track and straight path；Along with the carrying out of spinning pass, this transition arc is gradually decrease to the transition arc angle of finished product gas cylinder, and the length of straight path is gradually increased to the bottleneck of gas cylinder needs length；So repeatedly perform 5～6 passages；
4) end socket surface finishing spinning: keep seamless steel pipe closing in section temperature be 1175～1225 DEG C, seamless steel pipe around the velocity of rotation of self main shaft be 150～200rpm when, to end socket surface finishing spinning.
2. method according to claim 1, it is characterised in that: in described step 1), the relation of the heated length L of the closing in section of seamless steel pipe and seamless steel pipe external diameter Φ is: L=Φ/2+(220～320mm).
3. method according to claim 1, it is characterised in that: described step 2) in, adopt benefit temperature automatically to rob the closing in section to seamless steel pipe and carry out mending temperature.
4. method according to claim 1, it is characterised in that: described step 2) in, the spinning roller that odd-numbered pass runs is front spinning roller, and the spinning roller that even-numbered pass is run is rear spinning roller.
5. method according to claim 1, it is characterized in that: described step 2) in, the spinning roller amount of feeding that first passage sealing spinning is corresponding is 340～380mm, second passage sealing spinning roller lateral feed corresponding to spinning is 40～60mm, after spinning roller lateral feed corresponding to each passage sealing spinning successively decrease each time 5～10mm.
6. method according to claim 1, it is characterised in that: in described step 3), every time spinning roller is 30～45mm at the lateral feed of seamless steel pipe closing in section, and every time 5～10mm that successively decreases.
7. method according to claim 1, it is characterized in that: every time lateral feed of described front spinning roller or rear spinning roller, the amount of feeding of the first passage refers to the initial spinning point length value to Steel pipe end surface of spinning roller, and the amount of feeding of all the other each passages refers to that the initial spinning point of spinning roller of this passage is to the initial spinning point of upper a time spinning roller along the distance value of steel pipe transverse.
8. method as claimed in any of claims 1 to 7, it is characterised in that: the spinning roller width B=120 ± 0.1mm, the radius of corner R1=30 of work surface side～45mm, the radius of corner R2=10 of non-working surface side～20mm of described front spinning roller or rear spinning roller.
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| CN201610110236.XA CN105728576A (en) | 2016-02-29 | 2016-02-29 | Double-rotation wheel hot spinning necking method for large-diameter seamless gas cylinder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271651A (en) * | 2016-08-28 | 2017-01-04 | 嵊州市新高轮制冷设备有限公司 | The process units of a kind of liquid reservoir and the using method of this device |
| CN110355270A (en) * | 2019-08-09 | 2019-10-22 | 浙江威能消防器材股份有限公司 | A kind of seamless gas cylinder closing-up machine |
| CN111151631A (en) * | 2020-01-14 | 2020-05-15 | 沈阳航空航天大学 | Multi-pass spinning forming clamping structure and spinning method for variable cross-section guide pipe of oil tank |
| CN112170673A (en) * | 2020-11-27 | 2021-01-05 | 中材科技(成都)有限公司 | Automatic concurrent heating mechanism of aluminium bottle spinning binding off |
| CN115318924A (en) * | 2022-10-17 | 2022-11-11 | 四川大学 | Titanium alloy seamless gas cylinder spinning equipment and spinning forming method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271651A (en) * | 2016-08-28 | 2017-01-04 | 嵊州市新高轮制冷设备有限公司 | The process units of a kind of liquid reservoir and the using method of this device |
| CN110355270A (en) * | 2019-08-09 | 2019-10-22 | 浙江威能消防器材股份有限公司 | A kind of seamless gas cylinder closing-up machine |
| CN111151631A (en) * | 2020-01-14 | 2020-05-15 | 沈阳航空航天大学 | Multi-pass spinning forming clamping structure and spinning method for variable cross-section guide pipe of oil tank |
| CN111151631B (en) * | 2020-01-14 | 2021-06-29 | 沈阳航空航天大学 | Multi-pass spinning forming clamping structure and spinning method for variable cross-section guide pipe of oil tank |
| CN112170673A (en) * | 2020-11-27 | 2021-01-05 | 中材科技(成都)有限公司 | Automatic concurrent heating mechanism of aluminium bottle spinning binding off |
| CN112170673B (en) * | 2020-11-27 | 2021-03-16 | 中材科技(成都)有限公司 | Automatic concurrent heating mechanism of aluminium bottle spinning binding off |
| CN115318924A (en) * | 2022-10-17 | 2022-11-11 | 四川大学 | Titanium alloy seamless gas cylinder spinning equipment and spinning forming method thereof |
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