CN1022171C - Method for making angular core-head to hot-extrude bend - Google Patents
Method for making angular core-head to hot-extrude bend Download PDFInfo
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- CN1022171C CN1022171C CN 91103670 CN91103670A CN1022171C CN 1022171 C CN1022171 C CN 1022171C CN 91103670 CN91103670 CN 91103670 CN 91103670 A CN91103670 A CN 91103670A CN 1022171 C CN1022171 C CN 1022171C
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- dihedral
- core print
- central layer
- section
- steel plate
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Abstract
The present invention relates to an angular core head producing method for hot extruded elbow, which is characterized in that two angular main core boards made by a special method and a plurality of auxiliary core boards are overlapped and welded in order to make into a rough blank of the angular core head. Afterwards, the angular core head is produced by grinding manually. The method is simple and convenient and can be widely applied to extruded elbow manufacturers and general machine processing factories. An extruded elbow made by a mould made of the angular core head can meet the relative standard requirement without needing a reshaping procedure.
Description
The present invention relates to pick the manufacture method of the mould-dihedral core print that squeezes elbow.
At present, explained hereafter such as the elbow that departments such as oil, chemical industry use is many to adopt punching press in the special manufacturer, push, it is the most advanced wherein to push technology.It has geometric accuracy height, dimensionally stable, wall thickness is even, productivity ratio is high and unique advantage such as mechanical performance preferably.The core of pushing elbow technology is mould-dihedral core print.The structure of dihedral core print is made up of cylindrical section (1) distortion extension diameter section (2) and setting section (3) usually as shown in Figure 1.Among the figure:
Setting section diameter l
1For wanting the internal diameter of pushing elbow;
The cylindrical section diameter d
2Than the little 2-4mm of internal diameter that waits to push pipe;
The outer arc radius R of dihedral core print equals to want one of bending radius plus thirty of pushing elbow setting section diameter d doubly
1;
The α angle is 80 °～90 °;
The β angle is 25～30 °;
At core bar of dihedral core print rear portion weldering, form the dihedral mandrel.
The production process of pushing elbow as shown in Figure 2.Before pushing, pipe to be pushed (4) is penetrated from core bar (5) tail end, the core bar tail end is fixed, and under the effect of push pedal (6), pipe moves forward lentamente.When the pipe front end begins the distortion extension diameter section of entering angle core head (7), sensed ring (8) (or flame) heating.Pushed pipe and also just begin to produce the thermoplastic distortion at this moment, produce the hole enlargement distortion simultaneously diastrophic, after the setting of setting section, break away from core print, elbow is pushed shaping.Elbow is pushed in the process, and the heating of pipe blank temperature is 600-900 ℃, and mode of heating adopts intermediate frequency diathermanous more.Also useful flame heat.The physical dimension of elbow depends on the geometry of dihedral core print.Usually the method for making the dihedral core print is: be cast into crude green body earlier, manually reconditioning forms then, makes the material that core print is used, and decides with the mode difference of heating.As using the diathermanous mode of intermediate frequency, material selection has the austenitic type heat-resistance stainless steel of paramagnetism, higher thermal intensity and high temperature oxidation resistance.As use flame heat, also can select mould steel for use.
In the document of magazine " Daqing Petroleum Institute's journal " second phase in 1987 " pushing elbow Process Discussion " and magazine " pressure vessel " 1988 first-phase " pick squeezing and make elbow ", disclose and picked the method for designing of squeezing elbow technology and dihedral core print, because core print is complex-shaped, can only lean on manual reconditioning at present, not form perfect preparation method as yet.Thereby, can't guarantee the size of the radius of curvature R of core print among Fig. 1 and the section d that formalizes
1The size conforms designing requirement, and the flatness of core print axis and symmetry.There are the disadvantages such as mouth, ellipse, distortion that rise in the elbow of pushing out, and must can reach related standard requirements through trimming.
Task of the present invention provides a kind of manufacture method that picks crowded elbow module-dihedral core print.It need not special-purpose Casting Equipment, pushing elbow factory and common Metal Processing Factory all can make, and it can guarantee the geometry of dihedral core print and the flatness and the symmetry of size and core print axis, from the elbow of core print release, do not need trimming, can reach related standard requirements.
Task of the present invention is finished as follows, polylith is had the overlapping welding of steel plate of certain geometrical shape and size and part built-up welding and makes dihedral core print crude green body, and manually reconditioning face is made the dihedral core print, and its step is as follows;
(1) steel plate is become an annulus through machined into, the external arc of annulus is for wanting the external arc of pushing elbow inwall, and the interior circular arc of annulus is for wanting the interior circular arc of pushing elbow inwall, and the wideest sidecar of outer rim is cut chamfering in annulus, is generally 2 * 30 °;
(2) extract the dihedral master central layer of two symmetries from the annular steel plate, its external arc is the external arc of annular steel plate, its interior circular arc is the interior circular arc of annular steel plate in the setting section, in the distortion extension diameter section is transition arc, the major part of the dihedral master central layer i.e. width of the section of formalizing is the annular steel plate width, and the width that its microcephaly promptly is out of shape the extension diameter section starting point is the diameter of cylindrical section;
(3) two block sizes are equated that the one side of the dihedral master central layer chamfering of symmetry is superimposed together along superimposed seam welding, the plane between two plates is the plane at place, core print axle center;
(4) extract the secondary central layer of polylith dihedral from steel plate, the every secondary central layer of dihedral overlaps with the axis of bending of main central layer, and shape is similar, and size is successively decreased successively, make the major-minor central layer superimposed after, each is perpendicular to the approaching as far as possible circle of the cross section of axis of bending;
(5) in the both sides of welding two good dihedral master central layers, the secondary central layer of earlier overlapping symmetrically successively welding dihedral makes its cross section near circular, welds with cylindrical section again, make the plane between two main central layers and the planes overlapping at cylindrical section axis place, form the plane at core print axis place;
(6) during the hand grinding core print,, protect not reconditioning easily meticulously for the inside and outside circle ring datum level of dihedral master central layer through machined into;
(7) make one group of mould ring that varies in size, during reconditioning, be enclosed within the different parts of core print with the mould ring examination of different size, at first allow the machined face of mould ring and main central layer suit, with the curvature of assurance core print and the circularity of verification core print cross section, particularly setting section should closely suit with the mould ring everywhere, the recess built-up welding, and protruding place grinds off;
(8) during the overlapping welding of each central layer, dihedral core print front end is that every weld seam of the end face of stub end must leave passage, and its position is random, so that core print is when being heated, the gas between central layer can freely be selected.
Advantage of the present invention is: the method that a kind of simple, practical, economic manufacturing dihedral core print is provided for elbow factory.Must special-purpose Casting Equipment, cost of manufacture is saved in the overlapping welding of available offcut of steel plate.Use the dihedral core print that this method makes and can guarantee designing requirement, the elbow from core print is released must can not reach related standard requirements by trimming.
Fig. 1, dihedral core print structure chart;
Fig. 2, pushing elbow principle schematic;
The annulus profile of Fig. 3, making dihedral core print master central layer turning processing;
The partial enlarged drawing of Fig. 4, Fig. 3;
Fig. 5, the blanking figure of dihedral core print master central layer on annulus;
Fig. 6, dihedral master central layer welding front view;
Fig. 7, dihedral master central layer weld side view;
The partial enlarged drawing of Fig. 8, Fig. 7;
Fig. 9, the secondary central layer blanking of dihedral schematic diagram;
The plate number and the method for determining dimension figure of Figure 10, the secondary central layer blanking of dihedral;
The assembling welding schematic diagram of Figure 11, dihedral core print;
Figure 12, reconditioning are with mould ring profile;
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
The steel plate that certain thickness is smooth becomes annular through machined into, interior circular diameter=2 * (R-d
1).Outside diameter=2R.Process circular arc as Fig. 3, Fig. 4, circular arc R
1=1/2d
1, cut the chamfering that is generally 2 * 30 ° at the wideest sidecar of the inside and outside edge of annulus.
The annular steel plate that processes is produced the dihedral master central layer ABCD(9 of two symmetries by blanking shown in Figure 5), the outer rim of its main central layer is the external arc of annulus; The inner edge of main central layer is the interior circular arc of annulus in the setting section, is a transition arc in the distortion extension diameter section, and it is wide that the big head width of main central layer is annulus, equals d
1, microcephaly's width is the cylindrical section diameter d
2Plasma cutting is adopted in the processing of transition arc usually, perhaps method such as carbon arc air gouging, spark machined, and this part does not need chamfering, and cutting part need polish metallic luster.
Shown in Fig. 6-8, the welding that is superimposed together of the one side of two dihedral master central layer chamferings, weld bead height is as far as possible near R
1Circular arc, no chamfered part gets final product along superimposed seam welding.
The secondary central layer A of dihedral
1B
1C
1D
1(10) with main central layer ABCD(9) axis of bending overlap, shape is similar, blanking plate number and each determining dimensions such as Figure 10, two concentric circles are cut by one group of parallel lines, the line segment between same straight line and cylindrical intersection point is respectively AB, A
1B
1, and the line segment between interior round intersection point is respectively CD, C
1D
1AB is the width of main central layer major part, and CD is main central layer microcephaly's a width, and the width near a pair of secondary central layer two of main central layer both sides is respectively A
1B
1, C
1D
1, all the other and the like.Concentric inside and outside diameter of a circle is respectively the diameter d of dihedral core print cylindrical section and setting section
2, d
1, the spacing of parallel lines is for making the thickness of dihedral master central layer, secondary central layer steel plate.
By shown in Figure 11, be symmetrically welded the secondary central layer of dihedral successively in the both sides of dihedral master central layer, make it transversal and approaching circular, weld mutually with cylindrical section again, make the plane between two main central layers and the planes overlapping at cylindrical section axis place, form the plane at core print axis place, make the core print crude green body, front end weld seam between each central layer will leave passage, so that gas can freely be overflowed when expanded by heating between central layer.Diagonal form core print crude green body carries out hand grinding then, forms two main central layers of dihedral core print, and its mach inside and outside circle cambered surface will be protected meticulously, not reconditioning easily.
By shown in Figure 12, make one group of mould ring that varies in size.In the hand grinding process, be enclosed within the different parts of core print with the examination of different mould rings, at first allow the machined face of mould ring and main central layer suit, with the curvature of assurance core print, and the circularity of verification core print cross section, the recess built-up welding, recess grinds off, and particularly setting section should closely suit with the mould ring everywhere.
Claims (1)
1, the manufacture method of a kind of mould of pushing elbow-dihedral core print, the dihedral core print is made up of cylindrical section (1) distortion extension diameter section (2) setting section (3), it is characterized in that: the overlapping welding of steel plate that polylith is had certain geometrical shape and size, make dihedral core print crude green body, manually reconditioning and make the dihedral core print, its step is as follows:
(1) steel plate is become an annulus through machined into, the external arc of annulus is for wanting the external arc of pushing elbow inwall, and the interior circular arc of annulus is for wanting the interior circular arc of pushing elbow inwall, and the wideest sidecar of outer rim is cut chamfering in annulus, is generally 2 * 30 °;
(2) extract the dihedral master central layer (9) of two symmetries from the annular steel plate, its external arc is the external arc of annular steel plate, its interior circular arc is the interior circular arc of annular steel plate in setting section (3), in distortion extension diameter section (2) is transition arc, the major part of the dihedral master central layer i.e. width of the section of formalizing (3) is the annular steel plate width, and the width that its microcephaly promptly is out of shape extension diameter section (2) starting point is the diameter of cylindrical section (1);
(3) two block sizes are equated that the one side of the dihedral master central layer chamfering of symmetry is superimposed together along superimposed seam welding, the plane between two plates is the plane at core print axis place;
(4) extract the secondary central layer (10) of polylith dihedral from steel plate, the every secondary central layer of dihedral overlaps with the axis of bending of main central layer (9), and shape is similar, and size is successively decreased successively, make the major-minor central layer superimposed after, each is perpendicular to the approaching as far as possible circle of the cross section of axis of bending;
(5) in the both sides of welding two good dihedral master central layers, the secondary central layer of earlier symmetrical successively overlapping welding dihedral makes its cross section near circular, welds with cylindrical section again, make the plane between two main central layers and the planes overlapping at cylindrical section axis place, form the plane at core print axis place;
(6) during the hand grinding core print,, protect not reconditioning easily meticulously for the inside and outside circle arc datum level of dihedral master central layer through machined into.
(7) during hand grinding, be enclosed within the different parts of core print with the horizontal tool ring examination of one group of different size, at first allow the machined face of mould ring and main central layer suit, with the curvature of assurance core print and the circularity of verification core print cross section, particularly setting section should closely suit with the mould ring everywhere, the recess built-up welding, protruding place grinds off;
(8) during the overlapping welding of each central layer, dihedral core print front end is that every weld seam of the end face of stub end must leave passage, and its position is random, so that core print is when being heated, the gas between central layer can freely be overflowed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91103670 CN1022171C (en) | 1991-05-28 | 1991-05-28 | Method for making angular core-head to hot-extrude bend |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91103670 CN1022171C (en) | 1991-05-28 | 1991-05-28 | Method for making angular core-head to hot-extrude bend |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1057977A CN1057977A (en) | 1992-01-22 |
| CN1022171C true CN1022171C (en) | 1993-09-22 |
Family
ID=4906208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91103670 Expired - Fee Related CN1022171C (en) | 1991-05-28 | 1991-05-28 | Method for making angular core-head to hot-extrude bend |
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| Country | Link |
|---|---|
| CN (1) | CN1022171C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4282059B2 (en) | 2001-04-28 | 2009-06-17 | チャイナ ペトローリアム アンド ケミカル コーポレーション | Method for preparing rare earth zeolite Y |
| CN1230496C (en) | 2002-10-28 | 2005-12-07 | 中国石油化工股份有限公司 | Petroleum hydrocarbon cracking catalyst containing rare earthy type zeolite and its preparation method |
-
1991
- 1991-05-28 CN CN 91103670 patent/CN1022171C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1057977A (en) | 1992-01-22 |
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