CN103722060A - Thin-walled pipe end sealing device and charging push-bending forming method - Google Patents
Thin-walled pipe end sealing device and charging push-bending forming method Download PDFInfo
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- CN103722060A CN103722060A CN201310720343.0A CN201310720343A CN103722060A CN 103722060 A CN103722060 A CN 103722060A CN 201310720343 A CN201310720343 A CN 201310720343A CN 103722060 A CN103722060 A CN 103722060A
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Abstract
The invention discloses a thin-walled pipe end sealing device and a charging push-bending forming method, and belongs to the technical field of metal plastic forming. In the thin-walled pipe end sealing device, a sealing block is arranged at the front end of a central threaded rod, a first liquid guide channel is arranged on the axis of the central threaded rod, a sealing protection pad is sleeved on the central threaded rod and clings to the sealing block, the front end of the central threaded rod and the sealing protection pad are disposed in a pipe body of a thin-walled pipe, and an annular locking device is sleeved on the thin-walled pipe to extrude inwards to form a notch. Nuts compress the notch by being screwed on the central threaded rod. An end cap is connected with the tail end of the central threaded rod, and provided with a second liquid guide channel communicated with the first liquid guide channel. The method utilizes the thin-walled pipe end sealing device to form the thin-walled pipe by charging push-bending. Stability of pipe end sealing can be well guaranteed, internal pressure can be controlled and regulated, various defects easily caused during bending forming of the thin-walled pipe are eliminated, and integral forming efficiency of the thin-walled bent pipe is improved.
Description
Technical field
The present invention relates to a kind of tubing end sealing device and topping up and push away o ing method, is specifically that a kind of Thin-wall Tube end sealing device and topping up push away o ing method, belongs to metal forming technical field.
Background technology
Thin metallic tubd refers generally to the metal tube that radius-thickness ratio is greater than 50.Because it has realized product lightweight, Strengthening and Toughening and low energy consumption, in fields such as Aeronautics and Astronautics and auto industrys, find broad application at present.The wall thickness of light-wall pipe is relatively thin, when bending forming, the defects such as outer wall subsides, inwall is wrinkling, cross section distortion easily occurs.Although existing bending process by adjusting local deformation amount, reduce coefficient of friction, apply the modes such as deboost and improve, reduced to a certain extent light-wall pipe bending forming defect, but still cannot obtain qualified light-wall pipe bool completely, have influence on the normal use of parts like bent pipes.
The outer wall causing for minimizing BENDING PROCESS subsides, the defect of the wrinkling and cross section distortion of inwall, in prior art bending method often at casing pack filler, conventional filler has sand grains, flexible media, rosin or low-melting compound etc., while adopting sand grains or rosin etc. to fill as filler, not only load consuming time, and easily cause tubing internal injury, as Chinese invention patent CN102228922B discloses the method for the built-in steel ball bending forming of a kind of metal pipe material, although the method can realize the general bending of tubing, but owing to adopting steel ball as causing certain wearing and tearing to pipe material inner wall in filler BENDING PROCESS, therefore be not suitable for the bending of thin metallic tubd.
Prior art adopts the flexible filler such as gas or liquid to fill in addition, and these fillers are without solid shape, and it is convenient to fill, can Transmit evenly pressure and can real-time monitoring pressure.But for security standpoint, consider, generally select liquid as filler.While selecting liquid as filler, along with pushing away the fluid pressure in light-wall pipe in curved process, continue to increase, therefore must adopt stable sealing by light-wall pipe, otherwise cannot carry out normal bending.The most common in the mode of light-wall pipe sealing is at present horizontal cylinder axial seal, but in the process of topping up bend pipe, along with the bending of tubing, the two ends of pipe can be upturned, and horizontal cylinder cannot move along with the warpage of pipe end, therefore tubing cannot be pushed away to o ing.
Summary of the invention
The invention reside in and provide a kind of Thin-wall Tube end sealing device and topping up to push away o ing method, to solve prior art thin-wall metal pipe, push away in o ing process end sealing device and cannot adapt to normal light-wall pipe and push away o ing demand, body and easily occur that outer wall subsides, inwall is wrinkling, the technical problem of cross section distortion.
In order to solve the problems of the technologies described above, the invention provides a kind of Thin-wall Tube end sealing device, comprise sealing protection pad, annular locking device, center bolt, intake chute, nut and end cap, the front end of described center bolt is provided with sealing block, axle center is provided with the first intake chute, and described sealing protection cushion cover is close to sealing block on center bolt; Described center bolt front end and sealing protection pad are placed in the body of light-wall pipe; Described annular locking device is enclosed within on light-wall pipe, for light-wall pipe is inwardly squeezed out to breach; Described nut compresses breach by the precession on center bolt; Described end cap is connected with the end of center threaded rod, and end cap is provided with for be connected the second intake chute with hydraulic pump, and described the second intake chute is communicated with the first intake chute.
In the present invention, described annular locking device comprises outer ring and through the screw rod of outer ring, the front end of described screw rod in outer ring is connected with arc fork, and described screw rod can free precession or back-out on outer ring.
In the present invention, the rear end of described screw rod outside outer ring is provided with handle.
In the present invention, described sealing protection pad adopts polyurethane material to make.
In the present invention, the cross section of described breach is U-shaped or V-type.
In the present invention, described nut is round nut, hex nut or octagon nut.
The present invention also provides a kind of light-wall pipe topping up to push away o ing method, it is characterized in that comprising the following steps:
1), by one end sealing of light-wall pipe, the other end seals with above-mentioned Thin-wall Tube end sealing device;
2), the light-wall pipe of good seal is put into and pushed away bending mould;
3), the second oil guide groove on the end cap of Thin-wall Tube end sealing device is connected with hydraulic pump, open hydraulic pump, in Thin-wall Tube, inject filling liquid;
4), inject after filling liquid, end cap is connected with drift;
5), by drift, promote light-wall pipe and move, and change by the hydraulic pressure in hydraulic pump control light-wall pipe, light-wall pipe pushes away o ing the most at last;
6), by the light-wall pipe one end sealing place cutting after bending forming, and the Thin-wall Tube end sealing device of the lower other end of unloading, discharges body internal liquid, finally obtains thin-winding pipe.
In the present invention, above-mentioned steps 1) one end of the light-wall pipe in seals by sheet metal manual electric arc welding, argon arc welding or Laser Welding being welded on the mouth of pipe of light-wall pipe.
In the present invention, above-mentioned steps 1) the Thin-wall Tube end sealing device in seals step and is:
1), by cover have the center bolt of sealing protection pad be encased in light-wall pipe in, annular locking device is enclosed within outside light-wall pipe, tighten annular locking device, on light-wall pipe, squeeze out breach, stop threaded rod to move outside pipe;
2), lay down annular locking device, fastening nut coordinates with sealing protection pad and compresses breach;
3), at the end of center threaded rod, tighten end cap.
In the present invention, above-mentioned steps 3), the filling liquid step 4) is water, saponification liquor or hydraulic oil.
The beneficial effect of the invention is: (1), Thin-wall Tube end sealing device of the present invention can seal preferably light-wall pipe pipe end and control and adjust interior pressure, when pushing away o ing thin-winding pipe, also provide internal hydraulic pressure to support, facilitated the monolithic molding of thin-winding pipe; (2), the present invention can eliminate the compression unstability defect that light-wall pipe easily occurs when bending forming; (3), the present invention has wide range of applications, and is applicable to the multiple shapings such as the going for a stroll of light-wall pipe, press-bending, roll bending; (4), low cost of manufacture of the present invention, do not need new former, after being shaped, internal liquid is easily removed, and light-wall pipe inwall is had no effect.
Accompanying drawing explanation
Fig. 1 is Thin-wall Tube end sealing device structural representation of the present invention;
Fig. 2 is the annular locking device schematic diagram of the inside crimp of pipe end of the present invention;
Fig. 3 is the present invention's annular locking structure drawing of device;
Fig. 4 is that the present invention pushes away o ing flow chart of steps;
Fig. 5 is the structural representation that the light-wall pipe after filling liquid is connected with drift;
Fig. 6 is the thin-winding pipe front view after bending forming;
Fig. 7 is the thin-winding pipe sectional view after bending forming;
In figure, 1-light-wall pipe, 2-sealing block, 3-sealing protection pad, 4-annular locking device, 5-center bolt, 6-the first intake chute, 7-nut, 8-end cap, 9-the second intake chute, 10-filling liquid, 11-drift, 12-outer ring, 13-screw rod, 14-arc fork, 15-handle.
The specific embodiment
Below in conjunction with accompanying drawing, the Thin-wall Tube end sealing device in the present invention is elaborated.
As shown in Figure 1, 2, 3, Thin-wall Tube end sealing device of the present invention, comprises sealing protection pad 3, annular locking device 4, center bolt 5, nut 7 and end cap 8.Center bolt 5 comprises front end and end, and its front end is connected with sealing block 2, and the axle center of center bolt 5 is provided with the first intake chute 6 injecting for liquid in body, and sealing protection pad 3 is enclosed within is close to sealing block 2 on center bolt 5; The sealing block 2 of center bolt 5 front ends and sealing protection pad 3 are all placed in the body of light-wall pipe 1; Annular locking device 4 is enclosed within on light-wall pipe 1, and for light-wall pipe 1 is inwardly squeezed out to breach, the cross section of breach is U-shaped or V-type; Nut 7 compresses breach by the precession on center bolt 5, and nut 7 quantity can arrange as required; End cap 8 is screwed in the end of center threaded rod 5, and end cap 8 is provided with the second intake chute 9 and is communicated with first intake chute 6 in center threaded rod 5 axle center, and the second intake chute 9 on end cap 8 is for being connected with hydraulic pump.
Annular locking device 4 comprises outer ring 12 and through the screw rod 13 of outer ring 12, the front end of screw rod 13 in outer ring 12 established and be connected with arc fork 14, and screw rod 13 is provided with handle 15 in 12Wai rear end, outer ring; Rotary handle 15, screw rod 13 is free precession or back-out on outer ring 12, thereby drives the advance and retreat of arc fork 14.
Above-mentioned protective pad sealing protection pad 3 adopts polyurethanes or other to make with performance materials; Nut 7 is round nut, hex nut or octagon nut.
In Thin-wall Tube end sealing device of the present invention use procedure, the center bolt 5 that first cover is had to sealing protection pad 3, be installed to the inside of light-wall pipe, annular locking device 4 is enclosed within outside pipe, handle 15 on rotary annular locking device 4, makes screw rod 13 12 interior precessions in outer ring, thereby promote arc fork 14, advances, by outer ring 12 and arc, pitch 14 mutual extruding, on pipe, squeeze out breach; Breach blocks center screw thread 5 bars can not move it outside pipe; Rotary handle 15 is laid down annular locking device 4, and fastening nut 7, by closely pushing breach nut 7 and coordinating of sealing protection pad 3; At the end of center threaded rod 5, tighten end cap 8, the second intake chute 9 of end cap 8 is communicated with first intake chute 6 in center threaded rod 5 axle center, and the intake chute of end cap 89 is connected with hydraulic pump, hydraulic pump is also as required controlled hydraulic pressure body in to light-wall pipe 1 is interior for filling liquid 10 by the second intake chute 9 on end cap 8 and the first intake chute 6 on center bolt 5.
Above-mentioned filling liquid 10 can adopt water, saponification liquor or hydraulic oil.
Below in conjunction with accompanying drawing 4,5,6,7 and embodiment, light-wall pipe topping up of the present invention being pushed away to o ing method describes.
Embodiment 1
1), adopt 6061 aluminum alloy plate materials volume welderings that 1mm is thick for diameter be the aluminum alloy thin walled pipe of 100 mm, the axial length of aluminum alloy thin walled pipe is about 500mm;
2), by one end of aluminum alloy thin walled pipe, with sheet metal, the welding method line up by argon arc welding seals;
3), first cover there is is the center bolt 5 of sealing protection pad 3 to be encased in the other end of aluminum alloy thin walled pipe, annular locking device 4 is enclosed within outside the aluminum alloy thin walled pipe other end, tightening annular locking device 4 is using aluminum alloy thin walled pipe inwardly to squeeze out breach, to block center screw thread 5 bars, it can not be moved outside pipe;
4), lay down annular locking device 4, screw on and screw hex nut, hex nut and coordinating of sealing protection pad 3 are closely pushed breach;
5), at the end of center threaded rod 5, tightening end cap 8 seals;
6), the aluminum alloy thin walled pipe of good seal is inserted and is pushed away in bending mould after, then carry out matched moulds;
7), the oil guide groove of end cap 89 is connected with hydraulic pump, open hydraulic pump, toward aluminum alloy thin walled pipe inner filling hydraulic oil;
8), inject to fill after hydraulic oil, end cap 8 is connected with drift 11, as shown in Figure 5;
9), under the support of certain pressure hydraulic oil, by drift, promote aluminum alloy thin walled pipe and move, push away in curved process by the variation of hydraulic pump control hydraulic pressure, and then realize the control that aluminum alloy thin walled pipe is pushed away to o ing performance, alloy thin-wall pipe pushes away o ing the most at last, as shown in Figure 6,7;
10), by the process section cutting of the aluminium alloy bend pipe one end after bending forming, and the end sealing device of the lower aluminium alloy bend pipe other end of unloading, discharges the inner hydraulic oil of filling of body completely, finally obtains 6061 aluminium alloy thin-walled bend pipes.
1), adopt the aluminum alloy thin walled pipe that 5083 aluminum alloy plate materials volume welderings that 1mm is thick are 100mm for diameter, the axial length of aluminum alloy thin walled pipe is about 600mm;
2), by one end of aluminum alloy thin walled pipe, with sheet metal, the welding method line up by arc welding seals;
3), first cover there is is the center bolt 5 of sealing protection pad 3 to be encased in the other end of aluminum alloy thin walled pipe, annular locking device 4 is enclosed within outside the aluminum alloy thin walled pipe other end, tightening annular locking device 4 is using aluminum alloy thin walled pipe inwardly to squeeze out breach, to block center screw thread 5 bars, it can not be moved outside pipe;
4), lay down annular locking device 4, screw on and screw round nut, round nut and coordinating of sealing protection pad 3 are closely pushed breach;
5), at the end of center threaded rod 5, tightening end cap 8 seals;
6), the aluminum alloy thin walled pipe of good seal is inserted and is pushed away in bending mould after, then carry out matched moulds;
7), the oil guide groove of end cap 89 is connected with hydraulic pump, open hydraulic pump, toward aluminum alloy thin walled pipe inner filling saponification liquor;
8), inject to fill after saponification liquor, end cap 8 is connected with drift 11, as shown in Figure 5;
9), under the support of certain pressure saponification liquor, by drift, promote aluminum alloy thin walled pipe and move, push away in curved process by the variation of hydraulic pump control hydraulic pressure, and then realize the control that aluminum alloy thin walled pipe is pushed away to o ing performance, aluminum alloy thin walled pipe pushes away o ing the most at last, as shown in Figure 6,7;
10), by the process section cutting of the aluminium alloy bend pipe one end after bending forming, and the end sealing device of the lower aluminium alloy bend pipe other end of unloading, discharges the inner saponification liquor of filling of body completely, finally obtains 5083 aluminium alloy thin-walled bend pipes.
1), adopt the stainless sheet steel of wall thickness 1mm to implement the stainless-steel thin-wall pipe that volume weldering is 202mm for diameter, the axial length of stainless-steel thin-wall pipe is about 700mm;
2), by one end of stainless-steel thin-wall pipe, with sheet metal, the welding method line up by Laser Welding seals;
3), first cover there is is the center bolt 5 of sealing protection pad 3 to be encased in the other end of stainless-steel thin-wall pipe, annular locking device 4 is enclosed within outside the stainless-steel thin-wall pipe other end, tightening annular locking device 4 makes stainless-steel thin-wall pipe inwardly squeeze out breach, to block center screw thread 5 bars, it can not be moved outside pipe;
4), lay down annular locking device 4, screw on and screw octagon nut, octagon nut and coordinating of sealing protection pad 3 are closely pushed breach;
5), at the end of center threaded rod 5, tightening end cap 8 seals;
6), the aluminum alloy thin walled pipe of good seal is inserted and is pushed away in bending mould after, then carry out matched moulds;
7), the oil guide groove of end cap 89 is connected with hydraulic pump, open hydraulic pump, toward the inner filling water that injects of stainless-steel thin-wall pipe;
8), inject to fill after water, end cap 8 is connected with drift 11, as shown in Figure 5;
9), under the support of certain pressure water, by drift, promote stainless-steel thin-wall pipe and move, push away in curved process by the variation of hydraulic pump control hydraulic pressure, and then realize the control that stainless-steel thin-wall pipe is pushed away to o ing performance, stainless-steel thin-wall pipe pushes away o ing the most at last, as shown in Figure 6,7;
10), by the process section cutting of the stainless steel elbow one end after bending forming, and the end sealing device of the lower stainless steel elbow other end of unloading, discharges the inner water of filling of body completely, finally obtains stainless steel thin-wall bend pipe.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, can also make some improvement under the premise without departing from the principles of the invention, and these improvement also should be considered as protection scope of the present invention.
Claims (10)
1. a Thin-wall Tube end sealing device, it is characterized in that: comprise sealing protection pad (3), annular locking device (4), center bolt (5), nut (7) and end cap (8), the front end of described center bolt (5) is provided with sealing block (2), axle center is provided with the first intake chute (6), and described sealing protection pad (3) is enclosed within is close to sealing block (2) on center bolt (5); Described center bolt (5) front end and sealing protection pad (3) are placed in the body of light-wall pipe (1); It is upper that described annular locking device (4) is enclosed within light-wall pipe (1), for light-wall pipe (1) is inwardly squeezed out to breach; Described nut (7) compresses breach by the precession on center bolt (5); Described end cap (8) is connected with the end of center threaded rod (5), and end cap (8) is provided with the second intake chute (9) being communicated with the first intake chute (6).
2. Thin-wall Tube end sealing device according to claim 1, it is characterized in that: described annular locking device (4) comprises outer ring (12) and passes the screw rod (13) of outer ring, the front end of described screw rod (13) in outer ring (12) is connected with arc fork (14), and described screw rod (13) can (12) upper free precession or back-out in outer ring.
3. Thin-wall Tube end sealing device according to claim 2, is characterized in that: the rear end of described screw rod (13) outside outer ring (12) is provided with handle (15).
4. Thin-wall Tube end sealing device according to claim 1, is characterized in that: described sealing protection pad (3) adopts polyurethane material to make.
5. Thin-wall Tube end sealing device according to claim 1, is characterized in that: the cross section of described breach is U-shaped or V-type.
6. Thin-wall Tube end sealing device according to claim 1, is characterized in that: described nut (7) is round nut, hex nut or octagon nut.
7. light-wall pipe topping up pushes away an o ing method, it is characterized in that comprising the following steps:
1), by one end sealing of light-wall pipe (1), the other end seals with Thin-wall Tube end sealing device described in claim 1-6 any one;
2), the light-wall pipe of good seal (1) is put into and pushed away bending mould;
3), the second oil guide groove (9) on the end cap of Thin-wall Tube end sealing device (8) is connected with hydraulic pump, open hydraulic pump, in light-wall pipe (1) pipe, inject filling liquid (10);
4), inject after filling liquid (10), end cap (8) is connected with drift (11);
5), by drift (11), promote light-wall pipe (1) motion, and change by the hydraulic pressure in hydraulic pump control light-wall pipe (1), light-wall pipe (1) pushes away o ing the most at last;
6), by the light-wall pipe after bending forming (1) one end sealing place cutting, and the end sealing device of the lower other end of unloading, discharges body internal liquid, finally obtains thin-winding pipe.
8. light-wall pipe topping up pushes away o ing method according to claim 7, it is characterized in that: one end of the light-wall pipe described step 1) (1) seals by sheet metal manual electric arc welding, argon arc welding or Laser Welding being welded on the mouth of pipe of light-wall pipe (1).
9. light-wall pipe topping up pushes away o ing method according to claim 7, it is characterized in that: the Thin-wall Tube end sealing device described step 1) seals step and is:
1), cover is had the center bolt (5) of sealing protection pad (3) be encased in light-wall pipe (1) in, annular locking device (4) is enclosed within outside light-wall pipe (1), tighten annular locking device (4), on light-wall pipe (1), squeeze out breach, stop screw thread (5) bar to move outside pipe;
2), lay down annular locking device (4), fastening nut (7) coordinates with sealing protection pad (3) and compresses breach;
3), at the end of center threaded rod (5), tighten end cap (8).
10. light-wall pipe topping up pushes away o ing method according to claim 7, it is characterized in that: described step 3), step 4) in filling liquid (10) be water, saponification liquor or hydraulic oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310720343.0A CN103722060B (en) | 2013-12-24 | 2013-12-24 | Thin-wall Tube end sealing device and topping up push away o ing method |
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| CN201310720343.0A CN103722060B (en) | 2013-12-24 | 2013-12-24 | Thin-wall Tube end sealing device and topping up push away o ing method |
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| CN103722060B CN103722060B (en) | 2016-08-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110576090A (en) * | 2019-08-26 | 2019-12-17 | 四川航天长征装备制造有限公司 | Pipe orifice sealing device |
| CN114029390A (en) * | 2021-11-10 | 2022-02-11 | 南京航威智造科技有限公司 | Inner high-pressure bent pipe shaping method |
| CN117451528A (en) * | 2023-12-25 | 2024-01-26 | 宝鸡市杰特瑞金属材料股份有限公司 | Thin-wall titanium pipe hydrostatic test frock |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110576090A (en) * | 2019-08-26 | 2019-12-17 | 四川航天长征装备制造有限公司 | Pipe orifice sealing device |
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| CN117451528A (en) * | 2023-12-25 | 2024-01-26 | 宝鸡市杰特瑞金属材料股份有限公司 | Thin-wall titanium pipe hydrostatic test frock |
| CN117451528B (en) * | 2023-12-25 | 2024-03-08 | 宝鸡市杰特瑞金属材料股份有限公司 | Thin-wall titanium pipe hydrostatic test frock |
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