CN1347772A - Making process of pipe with unequal wall thickness - Google Patents
Making process of pipe with unequal wall thickness Download PDFInfo
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- CN1347772A CN1347772A CN 01108347 CN01108347A CN1347772A CN 1347772 A CN1347772 A CN 1347772A CN 01108347 CN01108347 CN 01108347 CN 01108347 A CN01108347 A CN 01108347A CN 1347772 A CN1347772 A CN 1347772A
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- pipe
- wall thickness
- roll
- reducing
- long plug
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Abstract
The technological process of producing pipe with unequal wall thickness includes designing and machining long variable diameter mandred rod comprising different diameter sections in the contour sizes corresponding to that of the pipe; inserting the mandrel rod into blank steel pipe and drawing inside outer die; separating the drawn pipe and the mandrel rod with one separator; and final diameter setting treatment. The long variable diameter mandrel rod has transition section between each two sections of different diameters or may be a combination of several sections of mandrel rods. The axial section of the pipe may be rectangular, trapezoidal or else. The present invention has not strict production equipment requirement, low production cost and other advantages.
Description
The present invention relates to a kind of manufacturing process of steel pipe, mainly is a kind of manufacture craft of pipe with unequal wall thickness.
At present, the common steel tube producing method of cold working mainly contains cold group of method and cold-rolling practice, in the cold group of method generally with lack that plug dials that method for making uses at most, long plug is dialled less that method for making uses, the present domestic this pipe that does not wait wall of still can not producing, state's external enwergy is produced but technology and the equipment more complicated and the costliness of employing do not have the actual meaning of applying.
The objective of the invention is in order to overcome above-mentioned deficiency, and provide a kind of less demanding to production equipment, production cost is lower, and stable production process reliably reaches the manufacture craft of the higher pipe with unequal wall thickness of the quality of pipe.
The objective of the invention is to be achieved through the following technical solutions.The manufacture craft of this pipe with unequal wall thickness, at first according to the contour shape of pipe with unequal wall thickness inner hole wall axial direction, design by the different-diameter section form, the long plug of appearance profile reducing akin in the axial direction with it; No matter how hole shape and physical dimension change on the whole length of pipe with unequal wall thickness of these different models, can design on the length direction by having the long plug of reducing that the different-diameter section forms and meet the demands.Then the long plug of reducing is inserted in the blank steel pipe as internal mold, push the system dialled in the external mold together, in dialling the system process, long plug of reducing and steel pipe are together to same direction motion, when therefore the long plug of reducing of variant diameter segment is by the external mold calibrating strap on the length, gap between long plug of reducing and the external mold has just produced variation, thereby causes steel pipe to want to form on the length different wall thickness; Adopt separation equipment then, the long plug of steel pipe and reducing is separated; By this separation equipment, diameter of steel tube is enlarged, make the minimum diameter place of steel pipe expand maximum outside diameter place to greater than the long plug of reducing, then the long plug of reducing just can successfully have been released from pipe; At last steel pipe is carried out sizing processing, sizing is to carry out in the mode of cold group of cold group of existing tube reducing or hole enlargement, and other process procedure is all with cold group of general steel tube technology.
Purpose of the present invention can also be further perfect by the following technical programs.Between any two sections different-diameter sections of the long plug of reducing, be provided with changeover portion, in same section axially the cross section can also be huge shape or trapezoidal or other shapes.The long plug of reducing also can adopt the long plug of some reducings to connect and combine.Described separation equipment is a dual roll type plug separation equipment, mainly comprises upper and lower roll, roll-box, frame, top roll governor motion, top roll balanced controls, left and right sides guided plate and governor motion thereof, following roller regulating device, universal drive shaft, deceleration transmission system and motor.Described separation equipment can also be three-roller type plug separation equipment, mainly becomes the transmission system of roll, roll-box, inclined-plane governor motion, top roll balanced controls and the roll of 120 degree distributions to form by three.
Advantage of the present invention is: since can design by the different-diameter section form, the long plug of appearance profile reducing akin in the axial direction with it, thereby can produce the very short pipe with unequal wall thickness of wall thickness changeover portion, can control accurately changeover portion; The present invention still adopts cold group of technology, as long as cold group of pipe production line done supporting can production slightly, thereby less demanding to production equipment, production cost is lower, and it is higher that stable production process reliably reaches the quality of pipe with unequal wall thickness.
Fig. 1 is the main TV structure schematic diagram of common long plug in the prior art;
Fig. 2 is the main TV structure schematic diagram of the long plug of reducing in the embodiment of the invention 1;
Fig. 3 is the main TV structure schematic diagram of the long plug of reducing in the embodiment of the invention 2;
Fig. 4 is the main TV structure schematic diagram of the long plug of reducing in the embodiment of the invention 3;
Fig. 5 is a shaping and deformation structural representation in the embodiment of the invention 1;
Fig. 6 dials the long plug of reducing after the system and the structural representation of steel pipe in the embodiment of the invention 1;
Fig. 7 is through the structural representation of long plug of reducing behind the separation equipment and steel pipe among the embodiment 1;
Fig. 8 is two roller separation equipment structural representations among the embodiment 1;
Fig. 9 is two roller separation equipment floor map among the embodiment 1;
Figure 10 is a three-roller type separation equipment structural representation among the embodiment 2;
Below in conjunction with embodiment the present invention is further described.
Embodiment 1: the manufacture craft of this pipe with unequal wall thickness, at first according to the contour shape of pipe with unequal wall thickness inner hole wall axial direction, design by the different-diameter section form, the long plug 1 of appearance profile reducing akin in the axial direction with it, be provided with changeover portion between any two sections different-diameter sections of the long plug 1 of reducing; In forming process, can be to imposing pulling force, also can impose thrust at pipe and the long plug 1 of reducing dialled on the system line, the long plug 1 of reducing is inserted in the blank steel pipe 3 as internal mold, push together in the external mold 2, after the chieftain stretches out external mold, clamp the system dialled with the pincers car, make steel pipe on length, form different wall thickness; Adopt separation equipment then, the long plug 1 of steel pipe 3 and reducing is separated; This separation equipment is a dual roll type plug separation equipment, mainly comprises upper and lower roll 6,8, roll-box 5, frame 14, top roll governor motion 4, top roll balanced controls, left and right sides guided plate 7 and governor motion thereof, following roller regulating device, universal drive shaft 9, deceleration transmission system 10 and motor 11; Steel pipe 3 carries out sizing processing with after the long plug 1 of reducing separates to steel pipe 3, and sizing is to carry out in the mode of cold group of cold group of existing tube reducing or hole enlargement, and other process procedure is all with cold group of general steel tube technology.
Embodiment 2: design by the different-diameter section form, the long plug 1 of appearance profile reducing akin in the axial direction with it, being provided with in same section of the changeover portion axially between any two sections different-diameter sections, the cross section is trapezoidal, separation equipment is a three-roller type plug separation equipment, mainly becomes the transmission system of roll 12, roll-box 5, inclined-plane governor motion 13, top roll balanced controls and the roll of 120 degree distributions to form by three.
Embodiment 3: design by the different-diameter section form, the long plug 1 of appearance profile reducing akin in the axial direction with it, the long plug 1 of reducing can adopt the long plug of some reducings to combine by being threaded.
Claims (5)
1, a kind of manufacture craft of pipe with unequal wall thickness is characterized in that at first according to the contour shape of pipe with unequal wall thickness inner hole wall axial direction, design by the different-diameter section form, the long plug of appearance profile reducing akin (1) in the axial direction with it; Then the long plug of reducing is inserted in the blank steel pipe (3) as internal mold, push together in the external mold (2) and dial system, make steel pipe on length, form different wall thickness; Adopt separation equipment then, steel pipe (3) is separated with the long plug of reducing (1); At last steel pipe (3) is carried out sizing processing.
2, the manufacture craft of pipe with unequal wall thickness as claimed in claim 1 is characterized in that being provided with changeover portion between any two sections different-diameter sections of the long plug of described reducing (1), in same section axially the cross section be huge shape, trapezoidal or other shapes.
3, the manufacture craft of pipe with unequal wall thickness as claimed in claim 1 or 2 is characterized in that the long plug of described reducing (1) can adopt the long plug of some reducings to connect and combine.
4, the manufacture craft of pipe with unequal wall thickness as claimed in claim 1, it is characterized in that described separation equipment is a dual roll type plug separation equipment, mainly comprise upper and lower roll (6) (8), roll-box (5), frame (14), top roll governor motion (4), top roll balanced controls, left and right sides guided plate (7) and governor motion thereof, following roller regulating device, universal drive shaft (9), deceleration transmission system (10) and motor (11).
5, the manufacture craft of pipe with unequal wall thickness as claimed in claim 1, it is characterized in that described separation equipment is a three-roller type plug separation equipment, mainly become the transmission system of roll (12), roll-box (5), inclined-plane governor motion (13), top roll balanced controls and the roll of 120 degree distributions to form by three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01108347 CN1347772A (en) | 2001-02-26 | 2001-02-26 | Making process of pipe with unequal wall thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01108347 CN1347772A (en) | 2001-02-26 | 2001-02-26 | Making process of pipe with unequal wall thickness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1347772A true CN1347772A (en) | 2002-05-08 |
Family
ID=4657190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01108347 Pending CN1347772A (en) | 2001-02-26 | 2001-02-26 | Making process of pipe with unequal wall thickness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1347772A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974633A (en) * | 2012-12-31 | 2013-03-20 | 刘选萍 | Swell-shrink drawing molding process and device for reducing pipes |
| CN103071693A (en) * | 2012-12-25 | 2013-05-01 | 包进平 | Extrusion needle and extrusion method for large-specification thin-walled pipe or hollow profile |
| CN104624686A (en) * | 2015-03-03 | 2015-05-20 | 太原重工股份有限公司 | Method and device for extruding aluminium alloy pipe with variable cross section |
-
2001
- 2001-02-26 CN CN 01108347 patent/CN1347772A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071693A (en) * | 2012-12-25 | 2013-05-01 | 包进平 | Extrusion needle and extrusion method for large-specification thin-walled pipe or hollow profile |
| CN103071693B (en) * | 2012-12-25 | 2015-08-12 | 包进平 | A kind of squeezing needle for big-size thinning plastic tubing or hollow profile and pressing method |
| CN102974633A (en) * | 2012-12-31 | 2013-03-20 | 刘选萍 | Swell-shrink drawing molding process and device for reducing pipes |
| CN104624686A (en) * | 2015-03-03 | 2015-05-20 | 太原重工股份有限公司 | Method and device for extruding aluminium alloy pipe with variable cross section |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |