CN1057977A - Pick and squeeze the dihedral core print manufacture method that elbow is used - Google Patents
Pick and squeeze the dihedral core print manufacture method that elbow is used Download PDFInfo
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- CN1057977A CN1057977A CN 91103670 CN91103670A CN1057977A CN 1057977 A CN1057977 A CN 1057977A CN 91103670 CN91103670 CN 91103670 CN 91103670 A CN91103670 A CN 91103670A CN 1057977 A CN1057977 A CN 1057977A
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- dihedral
- core print
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Abstract
A kind of picking squeezed the dihedral core print manufacture method that elbow is used, and it is characterized in that: with two dihedral master central layer and overlapping welding of the secondary central layer of polylith made from ad hoc approach, make dihedral core print crude green body.The dihedral core print is made in manually reconditioning then.This method is easy, can be widely used in pushing elbow manufacturer and general machined factory.Make mould with the dihedral core print that this method is made, the elbow of release must trimming, can reach related standard requirements.
Description
The present invention relates to steel pipe and pick crowded elbow technology, particularly pick the manufacture method of the core-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 the 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) as shown in Figure 1.Among the figure:
Setting section diameter d
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 R of arc surface is the d of one of the bending radius plus thirty of wanting pushing elbow times
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 before pushing, penetrates pipe to be pushed (4) as shown in Figure 2 from core bar (5) tail end, the core bar tail end is fixed, and pipe is passed forward lentamente under the effect of push pedal (6).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 pyroplastic deformation 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 pushes that the heating of pipe blank temperature is 600～900 ℃ in the process, 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, manufactures and designs the core that the dihedral core print is a pushing elbow, and to make the dihedral core print usually be to be cast into crude green body earlier, and manually reconditioning forms then.Make the material that core print is used, decide with mode of heating is different.As using the diathermanous mode of intermediate frequency, material selection has paramagnetism, the austenitic type heat-resistance stainless steel of 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 " picking the manufactured 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.Do 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, and elbow is released from core print, must trimming, can reach related standard requirements.
Task of the present invention is finished as follows: polylith 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 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;
(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 middle main central layer i.e. width of the section of formalizing is the width of annular steel plate, 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, the welding that is superimposed together of the dihedral master central layer of symmetry, the plane between two plates is the plane at core print axis place;
(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;
(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 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;
(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 mould 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) weld seam of the overlapping welding hour angle of each steel plate core head front end will leave pore.
Advantage of the present invention is, a kind of method of simple, practical, economic manufacturing dihedral core print is provided for elbow factory.Must special-purpose Casting Equipment, the overlapping welding of available offcut of steel plate is saved cost of manufacture and is taken, and uses the dihedral core print that this method makes and can guarantee designing requirement, and elbow is released from core print, must can not reach related standard requirements by trimming.
Fig. 1 is a dihedral core print structure.
Fig. 2 is the pushing elbow principle.
Fig. 3 is an annulus of making dihedral master central layer turning processing.
Fig. 4 is the blanking figure of dihedral master central layer on annulus.
Fig. 5 is dihedral master central layer welding figure.
Fig. 6 is definite method of the secondary central layer blank size of dihedral.
Fig. 7 is a dihedral core print assembling welding schematic diagram.
Fig. 8 is a reconditioning mould ring.
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
As shown in Figure 3, certain thickness is smooth steel plate becomes annular through machined into.The minimum diameter φ of annulus
1=2(R-d
1), the maximum outside diameter φ of annulus
2=2R, circular arc R
1=1/2d
1, cut chamfering 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 A B C D of two symmetries by blanking shown in Figure 4, the outer rim of its main central layer is the external arc of annulus, the inner edge of main central layer, in the setting section is the interior circular arc of annulus, in the distortion extension diameter section is a transition arc, 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
2
As shown in Figure 5, 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.
The secondary central layer A of dihedral
1B
1C
1D
1(10) with main central layer A B C D(9) axis of bending overlap, shape is similar, blanking plate number and each determining dimensions such as Fig. 6, 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, is respectively A near the width at a pair of secondary central layer two of main central layer both sides
1B
1, C
1D
1All 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.
By shown in Figure 7; be symmetrically welded the secondary central layer of dihedral successively in the both sides of dihedral master central layer; make its cross section near circular; weld mutually with cylindrical section again; make the plane between two main central layers and the planes overlapping at cylindrical section axis place; the plane of forming core print axis place; make the core print crude green body; front end weld seam between each central layer will leave pore; diagonal form core print crude green body carries out hand grinding then; form two main central layers of dihedral core print, its mach inside and outside circle cambered surface will be protected meticulously, not reconditioning easily.
By shown in Figure 8, 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 different mould ring examinations, 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, insufficient section built-up welding, redundance grinds off, and particularly setting section should closely suit with the mould ring everywhere.
Claims (1)
1, a kind of mould of pushing elbow--the manufacture method of dihedral core print, the dihedral core print is by cylindrical section, distortion extension diameter section and setting section are formed, 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, 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;
(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 width of annular steel plate, 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, the welding that is superimposed together of the dihedral master central layer of symmetry, the plane between two plates is the plane at core print axis place;
(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;
(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 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;
(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 mould 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.
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 true CN1057977A (en) | 1992-01-22 |
| CN1022171C 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1022171C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6787123B2 (en) | 2001-04-28 | 2004-09-07 | China Petroleum & Chemical Corporation | Rare earth zeolite Y and the preparation process thereof |
| US7514385B2 (en) | 2002-10-28 | 2009-04-07 | China Petroleum And Chemical Corporation And Research Institute Of Petroleum Processing, Sinopec | Rare earth y-zeolite catalyst for cracking hydrocarbons and a method for preparing same |
-
1991
- 1991-05-28 CN CN 91103670 patent/CN1022171C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6787123B2 (en) | 2001-04-28 | 2004-09-07 | China Petroleum & Chemical Corporation | Rare earth zeolite Y and the preparation process thereof |
| US6991774B2 (en) | 2001-04-28 | 2006-01-31 | China Petroleum & Chemical Corporation | Rare earth zeolite Y and the preparation process thereof |
| US7514385B2 (en) | 2002-10-28 | 2009-04-07 | China Petroleum And Chemical Corporation And Research Institute Of Petroleum Processing, Sinopec | Rare earth y-zeolite catalyst for cracking hydrocarbons and a method for preparing same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1022171C (en) | 1993-09-22 |
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