CN1025010C - Multichannel pipe connection plastics forming technology and mould - Google Patents
Multichannel pipe connection plastics forming technology and mould Download PDFInfo
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- CN1025010C CN1025010C CN 90108312 CN90108312A CN1025010C CN 1025010 C CN1025010 C CN 1025010C CN 90108312 CN90108312 CN 90108312 CN 90108312 A CN90108312 A CN 90108312A CN 1025010 C CN1025010 C CN 1025010C
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Abstract
The present invention belongs to a plastics forming technology and a mould of multi-way pipe joints and variable cross-section hollow parts. The present invention adopts a solid material for serving as a sealed, force transmitted and forming medium. Firstly, the medium is melted, and is injected or arranged in a tube blank or a hollow billet which is preprocessed; then, the medium is arranged in a female mould which can be divided; the female mould is tightly closed, and the tube blank and the medium are pressurized by a punch head. The punch head extrudes the tube blank and simultaneously, extrudes the medium, so high pressure is formed in the tube blank, and the tube blank is extruded to a required shape. The mould is provided with the female mould which can be divided, and the lower end is provided with a taper alpha of 1 to 6 DEG or a tapered central hole with a taper alpha of 2 to 6 DEG. The apparatus and the mould are simple in the technology, and the precision and the plasticity of the blank are low. The solid medium can be repeatedly used, and the production cost is greatly reduced.
Description
The invention belongs to multiple way union and become moulding of section hollow parts and be extruded into shape technology and mould.
Pipe-line system reach in daily life in the departments such as petrochemical industry, electric power, nuclear power, machinery use very extensive, and multiple way union and to become the section hollow parts be its indispensable parts.In the daily life, as the pipe-line system of giving water, supplying gas, its interior pressure is little, and strength character requires low, and therefore employing is cast, welding method is produced these parts just is enough to meet the demands.And some specific (special) requirements are arranged for the pipeline that adopts in oil, chemical industry, the electric power electric power station system, as anti-high pressure, high temperature resistant, antiseptic and rustproof etc., like this, the pipe joint that casting, welding method are produced does not just reach requirement far away, and this just requires to be improved on material and processing method.Multi-ram forging processing be the new technique for forging that develops rapidly in recent years it combine the advantage of die forging and extruding, the limitation and the low weakness of benefit of traditional forging equipment processing have been overcome, have forging ' s block dimension precision height, quality is good, stock utilization is high, save advantages such as the energy, but forge three, pipe joint blank inner chamber such as four-way still needs machining, and the connection place of the inner chamber primary branch that processes is the streamlined connection of non-slyness, is used for pipeline liquid, the steam flow loss is bigger.At present, method commonly used is a pipe soft mode bulging method, promptly adopts the pressure of liquid, rubber to replace rigidity punch or die, hollow object or tubular blank is expanded outwardly, the protruding curved surface that expansion is required.What domestic application was more is rubber bulging, and especially Japanese abroad hydraulic expanding-forming then accounts for sizable ratio.
Though soft mode bulging method has many advantages, but still comes with some shortcomings:
1, for low-intensity, high-ductility material, the forging that soft mode bulging method is produced must increase towards the auxilliary operation that adds of arm bottom; Then need increase punching one overturning process to some high-strength material.
2, the deformation characteristics of soft mode bulging mainly is the stretching that material is subjected to tangential and generatrix direction, and the deformation extent of its bulging is subjected to the restriction of material extension limit, and the part forming thicker or thin to thickness is all very difficult.
3, along with the increase of deformation extent, the increase of interior pressure, the rubber bulging method will be consumed rubber in a large number, and the dielectric leakage of hydraulic expanding-forming method also will increase the weight of.Therefore, the equipment of requirement, the precision of mould, sealing are all higher.The raising of cost also makes the application of soft mode bulging method be subjected to certain restriction.
The object of the present invention is to provide the forming technology and the mould of a new multiple way union and change section hollow parts, in this processing technology, adopt some solid material to replace liquid, rubber as sealing, power transmission shaping medium, thereby reduce production costs, the quality of product, the utilization rate of material all are greatly improved.
Existing technology is to use rubber, liquid as the power transmission shaping medium, hollow object and tubular blank are expanded outwardly under pressure, the protruding curved surface that expansion is required, main points of the present invention are: adopt solid material as sealing, power transmission shaping medium, inject or pack into pretreated pipe or hollow blank after at first medium being dissolved, then they are packed into and can divide in the die of mould, close tight die, drift is to pipe and medium pressurization, drift is extrusion medium in extrusion tube blank, causes to form high pressure in the pipe with the crowded desired shape of expansion of pipe.Drift continues pressurization, makes medium wash away the arm bottom with enough pressure by die arm place blade shape.Drip molding is taken out die heats and dissolves medium and can obtain needed finished parts, the quantity of filling medium will be determined according to the shape and the deflection of processing parts, the medium of filling can be a kind of separately, also can be that two kinds of different mediums are respectively charged in the pipe, forming process can be squeezed under general workshop room temperature condition and is expanded into shape, also can be expanded into shape with squeezing after mould and the heating of pipe blank.Drift lower surface axial length equals the tapering of promising 1-6 ° of (0.2-0.6) pipe inner radius or has a diameter to equal (0.2-0.45) pipe internal diameter at the center, lower surface of drift, tapering is 2-6 ° a conical central hole, and the degree of depth of taper hole equals (1-5) pipe internal diameter.
Adopt solid dielectric to be by the present invention:
1, the medium of at room temperature selecting for use is (being weight ratio):
A. contain Bi54-58%, Pb16-18%, Sn10-20%, the alloy material of Hg9-12%;
B. contain Bi42-48%, Pb20-24%, Sn7-10%, Cd4-6%, the alloy material of In17-22%;
C. contain Bi48-52%, Pb20-24%, Sn10-13%, the alloy material of In18-22%;
D. contain Bi49-52%, Pb25-27%, Sn11-14%, the alloy material of Cd9-12%;
E. contain Bi50-53%, Pb30-40%, Sn0-16%, the alloy material of Cd0-8.2%;
F. fusing point is 45-70 ℃ industrial paraffin goods;
G. fusing point is 100～140 ℃ nitrite and nitrate goods;
1. contain KNO
345-60%, NaNO
235-45%, NaNO
35-10%, H
2The O0-6% goods;
2. contain NaNO
340-50%, NaNO
225-30%, KNO
325-30%, H
2The O0-7% goods;
3. contain Al(NO
3)
39H
2O40-60%, NaNO
2The 40-60% goods;
2) be expanded into the medium that shape selects for use and be squeezing after mould and the heating of pipe blank:
A. the fusing point of following composition is 435～960 ℃ chloride goods;
1. contain NaCl40-90%, KCl20-56%;
2. contain NaCl25-40%, CaCl
265-80%;
3. contain NaCl30-45%, LiCl50-70%;
4. contain NaCl40-=50%, MgCl
245-65%;
5. contain NaCl10-25%, BaCl
270-90%;
6. contain KCl26-55%, BaCl
250-75%;
7. contain NaCl20-30%, KCl25-35%, BaCl
245-55%;
8. contain NaCl15-35%, BaCl
225-50%, CaCl
230-55%;
9. contain BaCl
290-98%, NaCl2-10%;
10. BaCl
2100%, NaCl100%, KCl100%, CaCl
2100% single composition chloride;
B. crystalline melting point is 300-550 ℃ B
2O
3-PbO-Tl
2O is a glass;
C. crystalline melting point is 500-1000
0The B of C
2O
3-PbO-ZnO is a glass.
By can directly pouring into a mould after the art medium fusing in the present invention among tubulose or the hollow blank, also can make certain shape and pack in tubulose or the hollow blank as the power transmission shaping medium with the method for cast extruded or powder pressing.The medium of filling can be a kind of, also can be that the packing simultaneously of two kinds of different mediums is used.
During by two kinds of different mediums of filling of the present invention, select for use the higher alloy material medium of intersity limitation as sealing the end that the power transmission medium is arranged at drift, select for use the lower industrial paraffin of strength degree or nitrate and nitrite goods etc. to be arranged at the middle part of pipe or hollow blank as the power transmission shaping medium.
In order to regulate the size that control blank inwall bears pressure medium, in the medium of blank, plug is set, by the present invention to reduce plastic force, energy efficient.
Can be different by the present invention according to the quantity of the size of tubulose or hollow blank swell increment and geometric characteristic filling medium, the part that swell increment is big, the quantity of filling medium is more, makes blank end and drift shoulder that external series gap be arranged.The part that swell increment is less, the medium of filling is less, there is internal clearance the end of nose of punch and interior filling medium, to the big part of a side swell increment, the both ends of the opposite side tubular blank of correspondence are cut groove, and for big parts of both sides swell increment such as four-ways, then the inward at both ends with tubular blank cuts the recessed groove of symmetry, the degree of depth h of groove equals (0.01-0.6) pipe internal diameter, and the wall thickness that the groove width parameter equals pipe adds (0.0-0.35) pipe internal diameter.
The drift lower surface axial length of exerting pressure by the present invention equals the tapering of promising 1-6 ° of (0.2-0.6) pipe inner radius or the center, lower surface of drift has a diameter to equal (0.2-0.45) pipe internal diameter, tapering is 2-6 ° a conical central hole, and the degree of depth of taper hole equals (1-5) pipe internal diameter.
In first being processed, the outer surface of tubulose and hollow blank will be lubricated processing, to reduce the outer surface coefficient of friction by the present invention.Its inwall also will carry out measures such as pickling, alkali cleaning and water cleaning, to increase the coefficient of friction of inner surface.
Drawings and Examples:
Fig. 1-3 is threeway, four-way and the cutaway view that becomes the section hollow parts.
Fig. 4-6 is for moulding the operation principle that is extruded into shape technology.
Fig. 7-8 is the tubular blank cutaway view of two kinds of media of filling.
Fig. 9-10 is for being added with plug and tubular blank cutaway view in the middle of two kinds of fillings and a kind of medium.
Figure 11-12 is the drift cutaway view.
Figure 13 has external series gap and tubular blank cutaway view for drift shoulder and blank end.
Figure 14 has the tubular blank cutaway view of internal clearance for nose of punch and medium end.
Figure 15 cuts the tubular blank cutaway view of symmetrical groove for both ends.
Figure 16 cuts the tubular blank cutaway view of a side slope mouth for both ends.
In Fig. 4, (1) is drift, and (2) are dies, and (3) are tubular blank, and (4) are medium, and (5) are arm place push rod.(6) are arm in Fig. 5.(7) arm bottom in Fig. 6 for having washed open.
Be example explanation the present invention with (under the general workshop room temperature condition) processing tee pipe coupling under the room temperature below, this is the only specific embodiment of the present invention (seeing Fig. 4-6).
The solid dielectric that this example adopts is to contain Bi54-58%, Pb16-18%, Sn18-20%, the alloy material of Hg9-12%.It is that 10 millimeters, tapering are 3 ° conical central hole (seeing Figure 11) that there is diameter phi at its middle part of the drift of exerting pressure.The preliminary treatment of tubular blank comprises:
A. the outer surface of tubular blank carries out phosphatization, saponification processing or is coated with special lubricant, frictional resistance with blank surface and die surface in the reduction forming process, the blank inwall needs pickling, alkali cleaning and water to clean, to increase and the coefficient of friction that contacts solid shaping power transmission medium (4).
B. the upper and lower end parts of tubular blank (3) cuts also beveling not of hour blank of groove (do not outpour among Fig. 4-6 and see Figure 16) part swell increment.
The solid shaping power transmission medium (4) of fusing is cast in the tubular blank (3), and the medium of filling is less, drift (1) end with in fill solid shaping power transmission medium (4) end internal clearance arranged.The die (2) that the tubular blank (3) of medium is packed into and can be divided mould will be housed then, close tight die (2), last low punch (1) pressurizes to pipe and medium with certain speed, the high pressure that forms in the pipe (3) is with arm (6) (see figure 5) of the crowded expansion threeway of pipe, and drift (1) continues pipe (3) and solid power transmission shaping medium (4) pressurization.Medium (4) washes away arm bottom (7) (see figure 6) with enough pressure by die (2) arm place blade shape.Open die (2) and take out and melt away medium (4) in the shaping tee pipe coupling, can obtain the pipe joint that time processing is shaped.
Be that the processing tee pipe coupling is example explanation another specific embodiment of the present invention (seeing Fig. 4-6) under the high temperature below.
The medium that this example adopts is to contain NaCl10-25%, BaCl
2The chloride of 70-90% composition.The steel three-way pipe internal diameter of processing is 11 millimeters, and wall thickness is 5 millimeters.Promising 2 ° of the nose of punch of exerting pressure, the tapering that length is 5 millimeters (seeing Figure 12).Tubular blank outer surface after pickling, alkali cleaning processing and clear water are handled is earlier coated special lubricant, the frictional resistance on oxidation and reduction forming process blank surface and concave die cavity surface in the time of can preventing the blank heating is not because the little blank end of swell increment of this three-way pipe can be cut cut.
The present invention compares with existing technology has following advantage:
Press molding of drift just can obtain satisfactory length of tube, has omitted the punching overturning process. Many siphunculus (comprising threeway, four-way) joint of manufacturing for metals such as wall thickness is thinner with respect to the aperture or plasticity is higher, intensity is lower copper, aluminium, mild steel and become the section hollow element can once be gone out arm hole shape and sidewall hole shape when being extruded into shape moulding.
This processing technology can also be according to various different metal material hot forming characteristics, the shaping power transmission medium of selecting fusing point to be higher than room temperature carries out hot forming to above-mentioned part, forming temperature is 200 ℃-900 ℃, can further improve so once to mould and be extruded into the shape coefficient and reduce plastic force, hot forming is that the technology such as soft mode bulging is difficult to realize.
For the part of some shaping continuation processing, can utilize the rear interior filling medium conduct lining that is shaped, process so that carry out follow-up operation. Because the solid dielectric self seal forms necessary shaping high pressure, therefore compare with hydraulic pressure bulging method again, equipment, the mould of use are simple, require blank material precision, plasticity also lower, and the quality of product is controlled easily, yield rate height, production safety. In addition, because the medium that this processing method is used can be reused, the price comparison of some medium is low, consumes again in technical process and lacks, and has therefore reduced the production cost of part, and its economic benefit is fairly obvious.
Claims (9)
1, moulding of a kind of multiple way union and change section hollow parts is extruded into shape technology, use rubber, liquid is as the power transmission medium, hollow object or tubular blank are expanded outwardly under pressure, the protruding curved surface that expansion is required, feature of the present invention is: adopt solid material to replace rubber, liquid, as sealing, the power transmission shaping medium at first will inject or pack into pretreated pipe or hollow blank after this medium heat fused, then blank is packed into and can divide in the die of mould, close tight die, drift begins to pipe and medium pressurization, form high pressure in the pipe with the crowded desired shape of expansion of blank to making, drift continues pressurization makes medium wash away the arm bottom with enough pressure, drip molding is taken out the fusing medium of heating, can obtain high-quality drip molding, the quantity of filling medium will be determined according to the deformation characteristics of processing parts, the medium of filling can be a kind of separately, also can be that two kinds of different mediums are respectively charged in the pipe, forming process can be squeezed under general workshop room temperature condition and is expanded into shape, also can be expanded into shape with squeezing after mould and the heating of pipe blank again.
2, according to claim 1 moulding is extruded into shape technology, it is characterized in that (being weight ratio):
1) shaping medium of selecting for use under general room temperature condition is:
A. contain Bi54-58%, Pb16-18%, Sn18-20%, the alloy material of Hg9-12%;
B. contain Bi42-48%, Pb20-24%, Sn7-10%, Cd4-6%, the alloy material of In17-22%;
C. contain Bi48-52%, Pb20-24%, Sn10-13%, the alloy material of In18-22%;
D. contain Bi49-52%, Pb25-27%, Sn11-14%, the alloy material of Cd9-12%;
E. contain Bi50-53%, Pb30-40%, Sn0-16%, the alloy material of Cd0-8.2%;
F. fusing point is 45-70 ℃ industrial paraffin goods (viscoplastic material);
G. fusing point is 100～140 ℃ nitrite and nitrate goods;
1. contain KNO
345-60%, NaNO
235-45%, NaNO
35-10%, H
2The O0-6% goods;
2. contain NaNO
340-50%, NaNO
225-30%, KNO
325-30%, H
2The O0-7% goods;
3. contain Al(NO
3)
39H
2O40-60%, NaNO
2The 40-60% goods;
2) be expanded into the medium that shape selects for use and be squeezing after mould and the heating of pipe blank:
A. the fusing point of following composition is 435～960 ℃ chloride goods;
1. contain NaCl40-90%, KCl20-56%;
2. contain NaCl25-40%, CaCl
265-80%;
3. contain NaCl30-45%, LiCl50-70%;
4. contain NaCl40-50%, MgCl
245-65%;
5. contain NaCl10-25%, BaCl
270-90%;
6. contain KCl26-55%, BaCl
250-75%;
7. contain NaCl20-30%, KCl25-35%, BaCl
245-55%;
8. contain NaCl15-35%, BaCl
225-50%, CaCl
230-55%;
9. contain BaCl
290-98%, NaCl2-10%;
10. BaCl
2100%, NaCl100%, KCl100%, CaCl
2100% single composition chloride media;
B. crystalline melting point is 300-550 ℃ B
2O
3-PbO-TL
2O is a glass;
C. crystalline melting point is 500-1000 ℃ B
2O
3-PbO-ZnO is a glass.
3, according to claim 1 moulding is extruded into shape technology and it is characterized in that: can directly pour into a mould in the blank after the medium fusing, also can pack in the blank as working media with the shape that the method for cast extruded or powder pressing is made regulation.
4, according to claim 1 moulding is extruded into shape technology and it is characterized in that: in the medium of pipe plug is set.
5, according to claim 1 moulding is extruded into shape technology and it is characterized in that: the part big to swell increment, the medium of filling is more, makes blank end and drift shoulder external series gap be arranged, the part that swell increment is less, the medium of filling is less, makes the end of nose of punch and interior filling medium that internal clearance be arranged.
6, according to claim 1 moulding is extruded into shape technology and it is characterized in that: the outer surface of blank will be lubricated processing, and its inner surface carries out pickling, alkali cleaning and water and cleans.
7, according to claim 1 moulding is extruded into shape technology, it is characterized in that: during two kinds of different mediums of filling, the alloy material medium that strength degree is higher places and is close to nose of punch as sealing, power transmission medium, and industrial paraffin that strength degree is lower or nitrate and nitrite goods place the blank middle part as power transmission, shaping medium.
8, according to claim 1 moulding is extruded into shape technology, it is characterized in that: the part that a side swell increment is big is cut into groove with the both ends of the opposite side tubular blank of correspondence, the part that the swollen amount of two sides of symmetric shape is bigger then inwardly is cut into tubular blank two ends the recessed groove of symmetry, groove depth h equals (0.01-0.6) pipe internal diameter, and the wall thickness that the groove width parameter equals pipe adds (0.0-0.35) pipe internal diameter.
9, plastic extrusion forming mould according to claim 1, it is characterized in that: equal the tapering of promising 1-6 ° of (0.2-0.6) pipe inner radius or have a diameter to equal (0.2-0.45) pipe internal diameter at the center, lower surface of drift from drift lower surface axial length, tapering is 2-6 ° a conical central hole, and the degree of depth of taper hole equals (1-5) pipe internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90108312 CN1025010C (en) | 1990-10-20 | 1990-10-20 | Multichannel pipe connection plastics forming technology and mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90108312 CN1025010C (en) | 1990-10-20 | 1990-10-20 | Multichannel pipe connection plastics forming technology and mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1060615A CN1060615A (en) | 1992-04-29 |
| CN1025010C true CN1025010C (en) | 1994-06-15 |
Family
ID=4880939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90108312 Expired - Fee Related CN1025010C (en) | 1990-10-20 | 1990-10-20 | Multichannel pipe connection plastics forming technology and mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1025010C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433324A (en) * | 2013-09-11 | 2013-12-11 | 河南源泉电器有限公司 | Filling medium for extruding penetration piece and manufacturing technique of penetration piece |
| CN103433325A (en) * | 2013-09-11 | 2013-12-11 | 河南源泉电器有限公司 | Filling medium for extruding penetration piece and manufacturing technique of penetration piece |
| CN103447370A (en) * | 2013-09-11 | 2013-12-18 | 河南源泉电器有限公司 | Packing medium for extruding branch tube and manufacturing technology of branch tube |
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| CN101947572B (en) * | 2010-09-14 | 2012-05-30 | 江阴中南重工股份有限公司 | Tile type production method for tee pipe fitting |
| CN101972791B (en) * | 2010-10-18 | 2014-07-16 | 宁波市华涛不锈钢管材有限公司 | Thin-wall stainless steel tee tube cold pressing molding device and molding method thereof |
| CN102756033B (en) * | 2011-04-27 | 2015-09-30 | 上海汇众汽车制造有限公司 | The quick liquid-filling shaping method and system of multilayer pipe |
| CN102699657A (en) * | 2012-06-19 | 2012-10-03 | 浙江嘉兴亚达不锈钢制造有限公司 | Multi-way pipe connecting method |
| CN102773306B (en) * | 2012-08-09 | 2017-07-18 | 赵肖运 | Extruded tube leads to the manufacture craft of the logical part of filled media and its extruded tube of part |
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| CN104438409B (en) * | 2015-01-07 | 2017-02-22 | 营口昌信管业制造有限公司 | Pipe fitting cold extruding forming machine and forming technology thereof |
| CN106734341B (en) * | 2016-12-14 | 2018-10-30 | 中山市众泰机械设备有限公司 | A kind of filler and its processing technology of extruded piping branch tee part |
| CN106903485A (en) * | 2017-03-03 | 2017-06-30 | 广州市鼎大化工有限公司 | The powder filler medium and moulding process of the logical part of pipe |
| CN109108101A (en) * | 2018-08-23 | 2019-01-01 | 重庆三峡学院 | A kind of multidirectional extruding near-net-shape method of heavy wall four-way pipe |
| CN109127850B (en) * | 2018-10-22 | 2020-01-03 | 安徽工业大学 | Solid-liquid two-phase medium internal high-pressure forming method for special-shaped section thin-wall pipe fitting |
-
1990
- 1990-10-20 CN CN 90108312 patent/CN1025010C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433324A (en) * | 2013-09-11 | 2013-12-11 | 河南源泉电器有限公司 | Filling medium for extruding penetration piece and manufacturing technique of penetration piece |
| CN103433325A (en) * | 2013-09-11 | 2013-12-11 | 河南源泉电器有限公司 | Filling medium for extruding penetration piece and manufacturing technique of penetration piece |
| CN103447370A (en) * | 2013-09-11 | 2013-12-18 | 河南源泉电器有限公司 | Packing medium for extruding branch tube and manufacturing technology of branch tube |
| CN103433325B (en) * | 2013-09-11 | 2015-12-09 | 赵肖运 | A kind ofly lead to the filled media of part and the manufacture craft of the logical part of pipe for extruded tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1060615A (en) | 1992-04-29 |
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