CN102274868A - Separating barrel and damping extruding method and device for pipes - Google Patents
Separating barrel and damping extruding method and device for pipes Download PDFInfo
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- CN102274868A CN102274868A CN201010196393XA CN201010196393A CN102274868A CN 102274868 A CN102274868 A CN 102274868A CN 201010196393X A CN201010196393X A CN 201010196393XA CN 201010196393 A CN201010196393 A CN 201010196393A CN 102274868 A CN102274868 A CN 102274868A
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- damping
- extruding
- pipe fitting
- spare
- fitting cylinder
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Abstract
The invention discloses a separating barrel and damping extruding method for pipes. The method comprises the following steps of: putting a billet into an extruding barrel; separating the extruding barrel from an extruding machine after an extruding shaft and an extruding core shaft extrude and form the billet; pushing a core barrel subcomponent and an extruding forming component inside the core barrel subcomponent out of a bearing barrel body along the axial direction; and taking an extruded and formed component out of a separate core barrel subcomponent. The axial side walls of the core barrel subcomponent of a separating barrel and damping extruding device are mutually adhered and combined to form a hollow frustum-shaped cone; a heating element is arranged into a preheating hole of the core barrel subcomponent; the inner wall of the bearing barrel body which is provided with a heat insulating plate is matched with the conical surface of the core barrel subcomponent; a steel wire layer is wound on the outer wall of the bearing barrel body; and the extruding shaft and the extruding core shaft are inserted into the extruding barrel and at least one of the extruding shaft and the extruding core shaft can move axially. A tubular component or a rod component of which the generatrices are non-rectilinear can be smoothly formed; the utilization ratio of the material is high; the forming working period is short; the cost is low; and the spherical stress in the extruding process is high, so that defects, cracks and holes are ensured to be completely welded to obtain the high-quality pipes.
Description
Technical field
The present invention relates to a kind of extrusion forming method and device of pipe fitting, particularly a kind of be mainly used in fields such as nuclear power at pipe fitting cylinder-damping pressing method and the device that has heavy pipe fitting boss, the curve bus on the outer wall.
Background technology
So-called pipe fitting branch is meant: the structural member L of L 〉=(3～15) D is the length of structural member, and D is the cross section scale of structural member.Bus as pipe fitting is a straight line, can adopt existing extrusion process, and blank by the die orifice extrusion molding, is shaped comprising forward extrusion (as Fig. 1) and backward extrusion (as Fig. 2).No matter be forward extrusion or backward extrusion, because metal is by the continuously extruded shaping of die orifice, in the extrusion process, the die orifice size there is no change, thereby the bus of extruding part must be straight line, and this is a pressing method commonly used on the engineering.This pressing method requires all material extrusion mould-outlet of trying one's best, and as the equal extrusion mould-outlet of all material, is not have the surplus extruding of pressure; Otherwise it is surplus to need excision to press.This type of then is powerless by the conventional pressing method that the die orifice of extrusion die is shaped to the pipe fitting with curve bus.
At present, domesticly all adopt traditional free forging process manufacturing to have the pipe fitting of the structure of curve bus, as have the shaping manufacturing that the boss diameter reaches nuclear power one primary loop piping more than four inches.This technology is made the thick forging stock of trunk line earlier, and then machining is shaped, and its stock utilization only is 10～12%. 100～70 tons of forging that weigh, and through machining, just makes the trunk line of 10 tons of weights, and waste of material is huge.Manufacturing cycle length also is a big problem, and a trunk line needs the manufacturing schedule of half a year, and this kind state has seriously restricted the development of China's nuclear power.In addition, the shaping spheric stress of this traditional handicraft processing is very little, and only 80MPa has been difficult to guarantee the abundant seam of crackle in the trunk line blank.
Summary of the invention
In order to remedy above deficiency, the invention provides a kind of pipe fitting cylinder-damping pressing method and device, use this device and method to finish to have on the outer wall boss, bus is that the shaping extruding of the heavy pipe fitting of curve is made, manufacturing cycle is short, the stock utilization height, and internal soundness is good.
So-called pipe fitting cylinder-damping extruding is meant the extrusion process in a kind of recipient, refer in particular in the Closed Extrusion process of the pipe fitting with curve bus (non-rectilinear bus) (be L＞(3-15) D) in die cavity, and applied damping against squeezing the metal flow direction, to improve the spheric stress that is shaped greatly.Because the bus of the pipe fitting that is shaped is a curve, can't directly release from recipient, recipient must be designed to detachable structure, splits recipient and take out the pipe fitting of shaping, the intension of cylinder-damping extruding that Here it is.
The technical solution adopted in the present invention is: a kind of pipe fitting cylinder-damping pressing method, and operating procedure is as follows:
Step 1: blank is placed in the recipient of pipe fitting cylinder-damping pressurizing unit, at least one setting in motion pushes blank in the recipient and pushes in extrusion axis and the extruding mandrel, with the blank extrusion molding;
Step 2: recipient is separated together with the corresponding parts that are connected on the extrusion molding spare of its inside, extrusion axis, extruding mandrel and the extruder;
Step 3: recipient is released extruder together with the entire infrastructure of its inside;
Step 4: core bobbin spare and inner extrusion molding spare thereof are released from the carrying cylindrical shell together vertically, thereby core bobbin spare and inner extrusion molding spare thereof are separated with the carrying cylindrical shell;
Step 5: each core bobbin spare that will fit mutually is separated from each other;
Step 6: extrusion molding spare is taken out from each core bobbin spare that separates shape.
A kind of pipe fitting cylinder-damping pressurizing unit that is used for pipe fitting cylinder-damping pressing method comprises recipient, extrusion axis and extruding mandrel; Wherein recipient comprises at least two along the bus subdivision and detachable core bobbin spare that axial side wall is fitted mutually, the carrying cylindrical shell, heating element heater, thermal insulation board and steel wire floor, the axial side wall of each core bobbin spare is fitted mutually, be combined to form hollow frusto-conical, be that its outer wall is the conical surface, inwall is cylinder or the conical surface or the space curved surface that formed by the bus of any curvature, some preheating gates are arranged on each core bobbin spare, heating element heater is fixedly arranged in this preheating gate, be installed with some thermal insulation boards on the carrying cylindrical shell circumferential side wall, the carrying cylinder inboard wall is for to be combined to form the conical surface that the hollow frusto-conical face cooperates with each core bobbin spare; Closely twine on the carrying cylinder body outer wall and be provided with steel wire floor, extrusion axis and extruding mandrel all axially are inserted in the recipient, at least one is axially movable for extrusion axis and extruding mandrel, be in the extrusion process, at least one carries out axially-movable extrusion axis and extruding mandrel, finishes extrusion process, promptly can a motion, another is fixed, also can two all motions;
The material that is extruded of high temperature places the end of recipient or middle part or nearly middle part, the motion of exerting pressure of extruding mandrel or extrusion axis, material is carried out Closed Extrusion, material is extruded under the effect of extrusion axis and extruding mandrel, its internal diameter is controlled by control extrusion die shaft diameter, and its external diameter and outer wall boss are controlled by being full of tubulose die cavity (bus can be a curve) on the core bobbin spare inwall; Material also can be extruded a both forward and reverse directions extruding (or positive and negative crowded combination) and form tubular piece, behind the material forming, core bobbin spare is withdrawed from the carrying cylindrical shell, just can separate after core bobbin spare withdraws from, and so just tubular piece can be taken out smoothly.
As a further improvement on the present invention, the bus of the cylinder inboard wall that each core bobbin spare forms is a non-rectilinear, and material is full of the cartridge type cavity that contains the non-rectilinear bus of this kind complexity and is configured as the pipe fitting of curve bus.
As a further improvement on the present invention, described core bobbin spare number is 2～4.
As a further improvement on the present invention, the thermal insulation board on the described carrying cylindrical shell madial wall is to have the ceramic wafer of setting compression strength.
As a further improvement on the present invention, described thermal insulation board is fixedly arranged on the carrying cylindrical shell madial wall.
As a further improvement on the present invention, described thermal insulation board is fixedly arranged on the external sidewall of bearing tube.
As a further improvement on the present invention, described extruding mandrel lateral wall is provided with the damping joint of at least one ring-type evagination, the damping festival-gathering produces the damping against the material movement direction, guarantee the tubular piece forming quality, in many cases, do not add any damping, lean on the frictional force of metal material and recipient, extrusion die between centers, can finely be shaped; But to having the situation of many boss on some very complicated tubular piece lateral walls, can be because the inhomogeneities of plasticity flowing velocity distribution etc. be former thereby generation shaping tension, and the local phenomenon of being discontented with of filling, must apply damping this moment in contrary material movement direction, the damping that the damping joint in the extruding mandrel outside will produce contrary material movement direction guarantees the tubular piece forming quality.
As a further improvement on the present invention, described extrusion axis lateral wall is provided with the damping joint of at least one ring-type evagination.
As a further improvement on the present invention, the inwall of described core bobbin spare is provided with the damping joint of ring-type indent.
As a further improvement on the present invention, described core bobbin spare inwall is provided with ring-type cooling band, reduces the temperature of blank in the exit, to increase deformation damping, prevent to form the shaping tension, and the part is not fully filled phenomenon.
As a further improvement on the present invention, be positioned at against being provided with damping force in the direction of extruding that is extruded part, produce tension and material when preventing material forming and fill discontented phenomenon generation, guarantee the tubular piece forming quality, this power on the end face in the space of annular can be uniform also can be not uniform, this mainly decides according to tubular piece outside boss shape and distribution.
As a further improvement on the present invention, the tapering between described core bobbin spare outer wall and carrying cylinder inboard wall is 1: 800～1: 2500, withdraws from the carrying cylindrical shell so that inner canister component (comprising the extrusion in it) is whole easily.
Useful technique effect of the present invention is: the present invention is by the extruding mandrel, extrusion axis and detachable recipient are used, bus is that non-directional tubular piece or rod member can be shaped smoothly, for the production of main nuclear power pipeline has split new direction, tubular piece outer wall boss simultaneously of the present invention adopts the rough shaping of the huge allowance of extrusion molding rather than traditional free forging process, thereby stock utilization can increase substantially 70～80% from 10%, improved the utilization rate of material greatly, the fitting to fitting extrusion molding duration of the present invention is short, forming process can drop to for 1～2 week required man-hour, the spheric stress of extrusion molding distortion is higher, can arrive 300～400MPa, can guarantee the defective in the blank, crackle, fully seam of hole, thereby adopt the trunk line quality of manufacturing of the present invention to be better than present traditional handicraft greatly.
Description of drawings
Fig. 1 is the forward extrusion schematic diagram of existing pressing method;
Fig. 2 is the backward extrusion schematic diagram of existing pressing method;
Fig. 3 is band boss tubular piece space curve welding method schematic diagram;
Fig. 4 is band boss tubular piece plane curve welding method schematic diagram;
Fig. 5 is band boss tubular piece axial section;
Fig. 6 material of the present invention is positioned at the recipient end view;
Fig. 7 enters squeezed state schematic diagram behind the die cavity for material from the recipient end;
Fig. 8 is positioned at recipient middle part schematic diagram for material;
Fig. 9 enters squeezed state schematic diagram behind the die cavity for material from recipient middle part;
Figure 10 is for applying the extruding force view;
Figure 11 is the backward extrusion view;
Figure 12 is a recipient radial section structural representation.
The specific embodiment
Embodiment: a kind of pipe fitting cylinder-damping pressing method, operating procedure is as follows:
Step 1: blank is placed in the recipient of pipe fitting cylinder-damping pressurizing unit, at least one setting in motion pushes blank in the recipient and pushes in extrusion axis and the extruding mandrel, with the blank extrusion molding;
Step 2: the corresponding parts that are connected on the recipient 1 extrusion molding spare together with its inside, extrusion axis, extruding mandrel and the extruder are separated;
Step 3: recipient 1 is released extruder together with the entire infrastructure of its inside;
Step 4: core bobbin spare 11 and inner extrusion molding spare thereof are released from carrying cylindrical shell 12 together vertically, thereby core bobbin spare 11 and inner extrusion molding spare thereof are separated with the carrying cylindrical shell;
Step 5: each core bobbin spare 11 that will fit mutually is separated from each other;
Step 6: extrusion molding spare is taken out from each core bobbin spare 11 that separates shape.
A kind of pipe fitting cylinder-damping pressurizing unit that is used for pipe fitting cylinder-damping pressing method comprises recipient 1, extrusion axis 2 and extruding mandrel 3; Wherein recipient 1 comprises at least two along the bus subdivision and detachable core bobbin spare 11 that axial side wall is fitted mutually, carrying cylindrical shell 12, heating element heater 13, thermal insulation board 14 and steel wire floor 15, the axial side wall of each core bobbin spare 11 is fitted mutually, be combined to form hollow frusto-conical, be that its outer wall is the conical surface, inwall is cylinder or the conical surface or the space curved surface that formed by the bus of any curvature, some preheating gates 16 are arranged on each core bobbin spare, heating element heater 13 is fixedly arranged in this preheating gate 16, be installed with some thermal insulation boards 14 on carrying cylindrical shell 12 circumferential side walls, carrying cylindrical shell 12 inwalls are for to be combined to form the conical surface that the hollow frusto-conical face cooperates with each core bobbin spare 11; Closely twine on carrying cylindrical shell 12 outer walls and be provided with steel wire floor 15, extrusion axis 2 and extruding mandrel 3 all axially are inserted in the recipient 1, extrusion axis 2 and extruding mandrel 3 at least one axially slidably, be in the extrusion process, at least one carries out extrusion axis and extruding mandrel axially-movable and finishes the extruding action, in the extrusion process, can a motion, another is fixed; Also can two all motions.During use, material is placed the middle part of recipient 1 or the end of near or recipient 1, extruding mandrel 3 and 2 pairs of metal materials of extrusion axis push and are shaped.Behind the pipe fitting forming, core bobbin spare 11 is withdrawed from from carrying cylindrical shell 12 together with extrusion, core bobbin spare 11 just can separate, and so just pipe fitting can be taken out smoothly.
The bus of the cylinder inboard wall that described each core bobbin spare 11 forms is a non-rectilinear, and material is full of the cartridge type cavity that contains the non-rectilinear bus of this kind complexity and is configured as the pipe fitting of curve bus.
Described core bobbin spare 11 numbers are 2～4.
Described thermal insulation board is fixedly arranged on the carrying cylindrical shell madial wall.
Described thermal insulation board 14 is fixedly arranged on carrying cylindrical shell 12 lateral walls.
Described extruding mandrel 3 lateral walls are provided with the damping joint 31 of at least one ring-type evagination, the damping festival-gathering produces the damping of contrary material movement direction, guarantee the tubular piece forming quality, in many cases, do not add any damping, lean on the frictional force of metal material and recipient, extrusion die between centers, can finely be shaped; But to having the situation of many boss on some very complicated tubular piece lateral walls, can be because the inhomogeneities of plasticity flowing velocity distribution etc. be former thereby generation shaping tension, and the local phenomenon of being discontented with of filling, must apply damping this moment in contrary material movement direction, the damping that the damping joint in the extruding mandrel outside will produce contrary material movement direction guarantees the tubular piece forming quality.
Described extrusion axis lateral wall is provided with the damping joint of at least one ring-type evagination.
The inwall of described core bobbin spare is provided with the damping joint of ring-type indent.
Described core bobbin spare 11 inwalls are provided with the ring-type cooling and are with 4, reduce the temperature of blank in the exit, increase deformation damping.
Described being positioned at contrary is provided with damping force F in the direction of extruding that is extruded part, this damping force F on the end face in the space of annular can be uniform also can be not uniform, this mainly decides according to tubular piece outside boss shape and distribution.
Tapering between described core bobbin spare 11 outer walls and carrying cylindrical shell 12 inwalls is 1: 800～1: 2500, withdraws from carrying cylindrical shell 12 so that inner canister component 11 (comprising the extrusion in it) is whole easily.
Claims (13)
1. pipe fitting cylinder-damping pressing method, it is characterized by: operating procedure is as follows:
Step 1: blank is placed in the recipient of pipe fitting cylinder-damping pressurizing unit, at least one setting in motion pushes blank in the recipient and pushes in extrusion axis and the extruding mandrel, with the blank extrusion molding;
Step 2: recipient (1) is separated together with the corresponding parts that are connected on the extrusion molding spare of its inside, extrusion axis, extruding mandrel and the extruder;
Step 3: recipient (1) is released extruder together with the entire infrastructure of its inside;
Step 4: core bobbin spare (11) and inner extrusion molding spare thereof are released from carrying cylindrical shell (12) together vertically, thereby core bobbin spare (11) and inner extrusion molding spare thereof are separated with the carrying cylindrical shell;
Step 5: each core bobbin spare (11) that will fit mutually is separated from each other;
Step 6: extrusion molding spare is taken out from each core bobbin spare (11) that separates shape.
2. the pipe fitting cylinder-damping pressurizing unit that is used for pipe fitting cylinder-damping pressing method is characterized by: comprise recipient (1), extrusion axis (2) and extruding mandrel (3); Wherein recipient (1) comprises at least two along the bus subdivision and detachable core bobbin spare (11) that axial side wall is fitted mutually, carrying cylindrical shell (12), heating element heater (13), thermal insulation board (14) and steel wire floor (15), the axial side wall of each core bobbin spare (11) is fitted mutually, be combined to form hollow frusto-conical, some preheating gates (16) are arranged on each core bobbin spare, heating element heater (13) is fixedly arranged in this preheating gate (16), be installed with some thermal insulation boards (14) on carrying cylindrical shell (12) circumferential side wall, carrying cylindrical shell (12) inwall is for to be combined to form the conical surface that the hollow frusto-conical face cooperates with each core bobbin spare (11); Closely be wound with steel wire floor (15) on carrying cylindrical shell (12) outer wall, extrusion axis (2) and extruding mandrel (3) all axially place in the recipient (1), and at least one can carry out axially-movable extrusion axis (2) and extruding mandrel (3).
3. pipe fitting cylinder as claimed in claim 2-damping pressurizing unit is characterized in that: the bus of the cylinder inboard wall that each core bobbin spare (11) forms is a non-rectilinear.
4. pipe fitting cylinder as claimed in claim 2-damping pressurizing unit is characterized in that: described core bobbin spare (11) number is 2～4.
5. pipe fitting cylinder as claimed in claim 2-damping pressurizing unit is characterized in that: the thermal insulation board (14) on described carrying cylindrical shell (12) madial wall is for having the ceramic wafer of setting compression strength.
6. pipe fitting cylinder as claimed in claim 2-damping pressurizing unit is characterized in that: described thermal insulation board is fixedly arranged on the carrying cylindrical shell madial wall.
7. pipe fitting cylinder as claimed in claim 2-damping pressurizing unit is characterized in that: described thermal insulation board (14) is fixedly arranged on carrying cylindrical shell (12) lateral wall.
8. pipe fitting cylinder as claimed in claim 2-damping pressurizing unit is characterized in that: described extruding mandrel (3) lateral wall is provided with the damping joint (31) of at least one ring-type evagination.
9. pipe fitting cylinder as claimed in claim 2-damping pressurizing unit is characterized in that: described extrusion axis (2) outer wall is provided with the damping joint (31) of at least one ring-type evagination.
10. pipe fitting cylinder as claimed in claim 2-damping pressurizing unit is characterized in that: the inwall of described core bobbin spare (11) is provided with the damping joint (31) of ring-type indent.
11. pipe fitting cylinder as claimed in claim 2-damping pressurizing unit is characterized in that: described core bobbin spare (11) inwall is provided with ring-type cooling band (4).
12. pipe fitting cylinder as claimed in claim 2-damping pressurizing unit is characterized in that: be positioned at against being provided with damping force (F) in the direction of extruding that is extruded part.
13. pipe fitting cylinder as claimed in claim 2-damping pressurizing unit is characterized in that: the tapering between described core bobbin spare (11) outer wall and carrying cylindrical shell (12) inwall is 1: 800～1: 2500.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010196393XA CN102274868A (en) | 2010-06-10 | 2010-06-10 | Separating barrel and damping extruding method and device for pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010196393XA CN102274868A (en) | 2010-06-10 | 2010-06-10 | Separating barrel and damping extruding method and device for pipes |
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| Publication Number | Publication Date |
|---|---|
| CN102274868A true CN102274868A (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010196393XA Pending CN102274868A (en) | 2010-06-10 | 2010-06-10 | Separating barrel and damping extruding method and device for pipes |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108311550A (en) * | 2018-05-10 | 2018-07-24 | 重庆大学 | A kind of flat extruding cylinder reducing inner cylinder stress |
| CN112238221A (en) * | 2020-11-05 | 2021-01-19 | 江苏永年激光成形技术有限公司 | Associated cylinder method of SLM (selective mapping) technology |
-
2010
- 2010-06-10 CN CN201010196393XA patent/CN102274868A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108311550A (en) * | 2018-05-10 | 2018-07-24 | 重庆大学 | A kind of flat extruding cylinder reducing inner cylinder stress |
| CN112238221A (en) * | 2020-11-05 | 2021-01-19 | 江苏永年激光成形技术有限公司 | Associated cylinder method of SLM (selective mapping) technology |
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Application publication date: 20111214 |