CN1715723A - Large profile angle screw thread joint pipeline and its producing method - Google Patents
Large profile angle screw thread joint pipeline and its producing method Download PDFInfo
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- CN1715723A CN1715723A CN 200510035570 CN200510035570A CN1715723A CN 1715723 A CN1715723 A CN 1715723A CN 200510035570 CN200510035570 CN 200510035570 CN 200510035570 A CN200510035570 A CN 200510035570A CN 1715723 A CN1715723 A CN 1715723A
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- 238000000034 method Methods 0.000 title description 12
- 239000002184 metal Substances 0.000 claims abstract 2
- 238000000465 moulding Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000003672 processing method Methods 0.000 claims description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 description 19
- 229910001220 stainless steel Inorganic materials 0.000 description 12
- 239000010935 stainless steel Substances 0.000 description 11
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 235000020188 drinking water Nutrition 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The large profile angle screw thread jointed pipe has inner and outer thread formed in the joint parts and the joint parts have relatively greater thickness resulted from plastic deformation. The thread has profile angle greater than 80 deg. The pipe of the present invention has raised strength and rigidity, and has the advantages of good connection performance and low application cost. The present invention is especially suitable for super thin metal pipe.
Description
Technical field
The present invention relates to the tubing of a kind of tubing, particularly water delivery.
Tap water will just can be fed to the user by line transportation, and aqueduct is the main cause that worsens the tap water quality to the secondary pollution of water quality.At present, along with carrying out of purification project and direct drinking water project, exploitation is not only satisfied the requirement of people to the raising drinking water quality to the cheap pipeline of water nonpollution, and is to ensure the healthy needs of people.
Background technique
The performance of Stainless Steel Tube intensity height, good toughness, the water quality of keeping a public place clean is good, so be the best material tubing of carrying water purification and implementing direct drinking.
The method that the connection of Stainless Steel Tube mainly contains welding or is threaded.The enforcement that wherein is welded to connect will possess certain conditions, and difficulty of construction height, expense are big, so less employing in the pipeline of middle-size and small-size caliber connects; Be threaded easy for installation, sealing is reliable, but its outside thread interface 5 of conventional threads mouthpiece (see figure 2) is owing to be cutting forming, so pipe thickness need increase the chipping allowance of the thread groove degree of depth 7, make the tube wall 6 of application thicker, the cost that Stainless Steel Tube is used in order is very high, is difficult to generally use.
In order to reduce the cost of using Stainless Steel Tube, begun to use the Stainless Steel Tube of thin-walled at present both at home and abroad.The connection of these thin-wall stainless steels generally adopts the clamp-press type joint to come transition to connect (see figure 3).This connection is the 9 pairs of thin walled tube 21 outer surfaces sealings of seal ring by clamp-press type joint 8 ends, and 6 card load moulds 10 by clamp-press type joint 8 prevent pulling of pipe 21.This connection is because needs increase the connection that the transition accessory of clamp-press type joint could be realized pipe, so connection charge is higher.Because this card presses the anticreep power of anticreep mode lower,, especially can not use simultaneously at the pipeline section of high pressure so be not suitable for using at important pipeline section.Also there is the inconvenient problem (will destroy joint just can change) that changes in this connection.Connect the costliness of transition fitting and the switching performance difference and the application inconvenience of joint, restricted the widespread usage of thin-wall stainless steel again.
Summary of the invention
The pipe and pipe fitting and the forming method thereof that the purpose of this invention is to provide a kind of large profile angle make the pipe of thin-walled also can adopt the connection of screw thread, improve the switching performance of thin walled tube, reduce the application cost of thin walled tube.
The thread form actual height of traditional pipe thread is 0.64 times of pitch, the thread groove degree of depth as the pipe of 1 cun of diameter is 1.48mm, for the traditional diamond-making technique that adopts cutting tube wall moulding screw thread, the screw thread machining allowance that the design thickness of using pipe must increase 1.48mm could satisfy the requirement of strength of pipe, relative 6 meters long pipe, in order to process the pipe end total length less than 0.04 meter screw thread, and increasing by 5.96 meters long, invalid pipe thickness that 1.48mm is thick, the waste ratio of its material is very big.Therefore, the waste of the invalid thickness of minimizing tube wall is the low-cost key technologies for application of exploitation Stainless Steel Tube.
The present invention is according to stainless specific elongation characteristics preferably, the crooked up and down gap of the vertical wave of mutual engaging-in formation of wheel screw thread is rolled in employing, force tube wall to produce plastic deformation, make the wall thickness of pipe thickness at the bottom of the thread groove and screw thread periphery all keep the thickness of the tube wall of body according to this crooked gap.Because the structural thickness (thread groove bottom tube wall thickness adds the thread form height) of pipe two ends threaded port so increased the axial moment of inertia of pipe end, has been strengthened the intensity and the rigidity of pipe greater than the pipe thickness of body.Therefore the pipe thickness of this pipe of the present invention can be thinner than the pipe thickness of traditional thin walled tube, thereby save material more.
The screw thread of large profile angle of the present invention, its angle of thread are greater than 80 °, and the thread form actual height is about 0.3 times of pitch.1 cun of diameter, pitch are that 1 cun 11 degree, tube body wall thickness are the thin-walled large profile angle screw thread joint pipe of 0.7mm, its threaded end is of a size of: the actual high 0.7mm of thread profile, the structural thickness 1.4mm (0.7mm+0.7mm) at pipe thread place is at the bottom of the thread groove and the pipe thickness 0.7mm of screw thread periphery.Therefore the contact strength of thread profile and the requirement that load-carrying ability can both satisfy this root pipe load.Simultaneously angle of thread is greater than 80 ° of tube wall plastic deformations that not only are very beneficial for thin walled tube, and can not destroy the metallographic structure of tubing again.
The threaded coupling pipe fitting of large profile angle of the present invention is owing to the minimizing of the thread groove degree of depth, so but the structural thickness of attenuate pipe fitting.The water pipe that conventional diameter is 1 cun, its thread groove degree of depth is 1.48mm, and pipe fitting of the present invention has only 0.7mm, therefore the wall thickness of the threaded coupling pipe fitting that matches with pipe of the present invention can attenuate 0.78mm (1.48mm-0.7mm), has saved the material of pipe fitting.Traditional threaded coupling pipe fitting (as threeway, elbow etc.) all is an internal thread interface simultaneously, and the jointing that must increase transition when being connected with internal thread interface pipe or pipe fitting could connect.So not only bother, and increased expense again.The threaded coupling pipe fitting of large profile angle of the present invention has the pipe fitting of outside thread interface and the pipe fitting of internal thread interface, and this order is connected with the pipe with internal thread interface and becomes very convenient, has made things convenient for construction, has saved application cost.
The screw thread joint pipeline of large profile angle of the present invention is compared with using traditional cutting forming threaded coupling pipe because saved between the pipe, the transition connecting tube accessory between pipe fitting and the pipe fitting, so saved the expense of using pipe fitting; Because pipe does not have invalid pipe thickness, so saved the expense of using tubing.Compare with using traditional thin-wall stainless steel, because the raising of interface capability, so can bear higher working pressure, using scope is more extensive; Owing to saved the transition connection fittings between the pipe, saved the expense of using pipe fitting; Because the convenience of connect using, so improved the efficient of installing and more convenient construction.Therefore, the pipe of large profile angle screw thread joint of the present invention and pipe fitting keep not only that the threaded coupling sealability is reliable, resistance to plucking takes off ability advantage strong and easy to connect, and the expense that can save a large amount of tubing and pipe fitting, be the novel tube of high quality, low application cost.
Description of drawings
Fig. 1, large profile angle screw thread joint pipe are plugged into
1, pipe; 2, outside thread interface; 3, internal thread interface; 4, the interface that is threaded of IPT interface and external pipe thread interface
Fig. 2, conventional threads interface pipe
5, outside thread interface; 6, pipe thickness; 7, the thread groove degree of depth
Fig. 3, thin-wall stainless steel clamp-press type joint connect
8, clamp-press type joint; 9, seal ring; 10,6 cards of clamp-press type joint load mould; 21, body
Fig. 4, two rolls the mutual engaging-in shaping schematic view of wheel outside thread
11 and 13, roll wheel; 12, roll wheel 11 outside threads; 14, roll wheel 13 outside threads; 15, screw thread 12 and 14 mutual engaging-in point; 21, body
Fig. 5, roll wheel outside thread and the mutual engaging-in shaping schematic view of outer cover die internal thread
16, roll wheel; 17, roll wheel 16 outside threads; 18, outer cover die rolls wheel; 19, outer cover die rolls wheel 18 internal threads; 20, the mutual engaging-in point of outside thread 17 and internal thread 19; 21, body
Fig. 6, cutting circle Taper Pipe outside thread shaping schematic view
21, body; 22, conical tube outside thread interface; 23, cutting tool; 24, cutting tool 23 run trace lines; 25, the shaft centre line of body 21; 26, the angle of shaft centre line 25 formation of cutting tool run trace line 24 and body
Fig. 7, cutting circle Taper Pipe forming internal threads schematic representation
21, body; 27, conical tube internal thread interface; 28, cutting tool; 29, cutting tool 28 run trace lines; 30, the shaft centre line of body 21; 31, the angle of shaft centre line 30 formation of cutting tool run trace line 29 and body
Embodiment
According to the present invention, a kind of manufacture method of large profile angle screw thread joint pipeline pipe fitting has: two roll wheel outside thread mutual engaging-in moulding screw thread, roll the wheel outside thread and roll with outer cover die and take turns mutual engaging-in moulding screw thread of internal thread and cutting forming screw thread.
One, two roll the mutual engaging-in moulding screw thread embodiment 1 of wheel outside thread:
The processing (see figure 4) of A, outside thread interface 2
The processing (see figure 4) of B, internal thread interface 3
The end (machining internal thread interface 3 pipe ends are than big two pipe thicknesses of external diameter of threading interface 2 pipe ends) of body 21 to be processed packed into roll wheel 13, remaining procedure is identical with the A method.
Finish the processing that the thin-wall stainless steel two ends have the pipe of internal thread interface and outside thread interface respectively by above A, B program.
Two, roll the wheel outside thread and roll the mutual engaging-in moulding embodiment 2 of wheel internal thread with outer cover die:
The processing (see figure 5) of A, outside thread interface 2
The outer surface that rolls wheel 16 has outside thread 17, and outer cover die rolls wheel 18 internal surfaces and has internal thread 19, and the pitch of screw thread 17,19 is identical, thread rotary orientation is identical.The surperficial outside thread 17 that wheel 16 is rolled in order rolls the internal thread 19 of wheel 18 at mutual engaging-in point 20 places with outer cover die, peripheral clearance between its screw thread equals the pipe thickness of body 21 to be processed, order is rolled wheel 16 and is rolled the rotation that wheel 18 is made equidirectional with outer cover die, the end of body 21 to be processed packed into roll wheel 16, and pipe is advanced engaging-in point 20 to the right.At this moment pipe end is at mutual engaging-in time of screw thread 17,19, follow to the right and to screw in, tube wall produces plastic deformation by rolling the gap that wheel forms between engaging-in mutually, becomes outside thread interface 2, wheel 16 is rolled in opposite spin and outer cover die rolls wheel 18, withdraws from the outside thread interface 2 that has machined.
The processing (see figure 5) of B, internal thread interface 3
The end (machining internal thread interface 3 pipe ends are than big two pipe thicknesses of external diameter of threading interface 2 pipe ends) of body 21 to be processed packed into roll wheel 16, all the other procedures are identical with the A method.
Finish the processing that the thin-wall stainless steel two ends have the pipe of internal thread interface and outside thread interface respectively by above A, B program.
Above processing method also can have the outer end greater than the inner or the outer end taper mouth of pipe less than the inner by in advance the port of pipe to be processed being enlarged or being reduced into, and pipe is processed into mouthpiece inside and outside the taper pipe thread.
Three, cutting forming screw thread embodiment 3:
The processing (see figure 6) of A, outside thread interface 2
Make body 21 rotations, angle of thread is equaled the port of the cutting tool 23 incision outside threads 22 of processed pipe angle of thread, and laterally walk by the rotation helical pitch of screw thread 22, make the cutter 23 cutting run trace lines 24 and the angle 26 of shaft centre line 25 formation of body 21 equal 1/2 of major diameter of thread tapering, the pipe end external diameter is processed into the outside thread conical tube sub-interface 22 that can match with internal thread interface by the cutting of cutter.
The processing (see figure 7) of B, internal thread interface 3
Make body 21 rotations, angle of thread is equaled the port of the cutting tool 28 incision outside threads 27 of processed pipe angle of thread, and laterally walk by the rotation helical pitch of screw thread 27, make the cutter 28 cutting run trace lines 29 and the angle 31 of shaft centre line 30 formation of body 21 equal 1/2 of threaded interior hole tapering, the pipe end endoporus is processed into the internal thread conical tube sub-interface 27 that can match with the outside thread interface by the cutting of cutter.
Claims (10)
1, a kind of feature of large profile angle screw thread joint pipe is the axial moment of inertia of the axial moment of inertia of pipe end greater than body.
2, according to claim 1 pipe feature, the molding character of its screw thread is by the crooked up and down gap of the vertical wave of mutual engaging-in formation of rolling the wheel screw thread, makes the thin-wall metal tube wall produce the plastic deformation moulding according to this crooked gap.
3, according to the feature of claim 2 thread forming, at the bottom of its thread groove and the pipe thickness of screw thread periphery equate with the pipe thickness of body.
4, according to the feature of claim 2 thread forming, the structural thickness at its pipe thread place (pipe thickness at the bottom of the thread groove adds the height of thread profile) is greater than the thickness of body.
5, according to the feature of claim 2 thread forming, axially engaging-in processing method is arranged, it is characterized in that processed pipe shaft centre line and roll horizontal sextant angle that axle centre forms greater than being enclosed within the thread helix lift angle that rolls wheel in the pipe.
6, according to the feature of claim 2 thread forming, have and roll the engaging-in processing method of wheel radial, it is characterized in that processed pipe shaft centre line and roll horizontal sextant angle that axle centre forms less than the thread helix lift angle that rolls wheel that is enclosed within the pipe, and inside and outside the radial distance that rolls between the wheel can adjust.
7, according to the feature of claim 2 thread forming, have two to roll the mutual engaging-in processing method of wheel outside thread, it is characterized in that two roll the wheel external thread rotary to opposite and two switched in opposite of rolling wheel, two roll the wheel screw thread a mutual engaging-in point.
8, according to the feature of claim 2 thread forming, there is outer cover die to roll the wheel internal thread and rolls wheel outside thread mutual engaging-in processing method, it is characterized in that two, to roll the thread rotary orientation of wheel identical and two to roll turning to of wheel identical, and two screw threads that roll wheel have a mutual engaging-in point.
9, the feature of a kind of large profile angle screw thread joint pipe, pipe fitting is the interface that the screw thread of its port can have externally threaded interface and internal thread, and the interface outer, internal thread between them can directly be plugged into mutually.
10, according to the feature of claim 9 pipe fitting, the angle of thread of the screw thread of its pipe fitting is greater than 80 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510035570 CN1715723A (en) | 2005-07-05 | 2005-07-05 | Large profile angle screw thread joint pipeline and its producing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510035570 CN1715723A (en) | 2005-07-05 | 2005-07-05 | Large profile angle screw thread joint pipeline and its producing method |
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| Publication Number | Publication Date |
|---|---|
| CN1715723A true CN1715723A (en) | 2006-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510035570 Pending CN1715723A (en) | 2005-07-05 | 2005-07-05 | Large profile angle screw thread joint pipeline and its producing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1715723A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688921A (en) * | 2012-06-25 | 2012-09-26 | 陈穗玲 | Roller brush molding pipe thread cutting machine and method for manufacturing thread |
| CN117123286A (en) * | 2023-09-01 | 2023-11-28 | 东海县浩远石英制品有限公司 | Sealed quartz digestion tube for measuring total nitrogen content of wastewater and preparation process thereof |
-
2005
- 2005-07-05 CN CN 200510035570 patent/CN1715723A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102688921A (en) * | 2012-06-25 | 2012-09-26 | 陈穗玲 | Roller brush molding pipe thread cutting machine and method for manufacturing thread |
| CN102688921B (en) * | 2012-06-25 | 2015-09-09 | 陈穗玲 | A kind of abrasive tumbling formed pipe rib machine and screw-tjread system making method thereof |
| CN117123286A (en) * | 2023-09-01 | 2023-11-28 | 东海县浩远石英制品有限公司 | Sealed quartz digestion tube for measuring total nitrogen content of wastewater and preparation process thereof |
| CN117123286B (en) * | 2023-09-01 | 2024-08-27 | 东海县浩远石英制品有限公司 | Sealed quartz digestion tube for measuring total nitrogen content of wastewater and preparation process thereof |
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