CN100471591C - Stretcher for producing copper alloy pipe for high precision petroleum pump - Google Patents
Stretcher for producing copper alloy pipe for high precision petroleum pump Download PDFInfo
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- CN100471591C CN100471591C CNB2007100487597A CN200710048759A CN100471591C CN 100471591 C CN100471591 C CN 100471591C CN B2007100487597 A CNB2007100487597 A CN B2007100487597A CN 200710048759 A CN200710048759 A CN 200710048759A CN 100471591 C CN100471591 C CN 100471591C
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- copper alloy
- high precision
- petroleum pump
- pipe
- die holder
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Abstract
The stretcher for producing copper alloy pipe for high precision petroleum pump includes stretching machine and forming mold, and features the universally rotatable forming mold. The forming mold includes fixed mold seat, universally rotatable mold sleeve in the drawing direction and coaxially matched mold core. Owing to the forming mold capable of universally rotating inside the mold seat, the forming mold always track the drawing force direction, the drawn pipe blank has its axis always identical with the drawing force direction and the produced pipe blank has high concentricity and high straightness.
Description
(1) technical field:
The present invention relates to a kind of device of producing copper pipe, is a kind of stretching device that is used to produce copper alloy pipe for high precision petroleum pump specifically.
(2) background technology:
Traditional copper tube production process is melting, and------extruding---stretches (pulling out)---and anneals, and perhaps is melting, and---the continuous pipe-casting base---is rolled---stretching (pulling out)---annealing in (or semicontinuous) casting continuously.In (pulling out) operation that stretches, on the stretch forming equipment if adopt common drawing die device, common drawing die device comprises along the stretching axis direction core rod of concentric suit successively, die sleeve and die holder, the die holder fixed installation, core rod and die sleeve are interference fit, die sleeve is a matched in clearance with cooperating of die holder, promptly be in the drawing process of copper pipe base, core rod, be maintained fixed state between die sleeve and the die holder, core rod, the axial line of die sleeve and die holder should be the axis of spindle of moulding copper pipe base in theory, but in the manufacturing process of reality, mainly due to when stretching condition changes, as using for a long time and not adjusting timely, the guide rail of stretching carriage walking takes place askew partially or when becoming uneven because of wearing and tearing, the run trace of stretching dolly and core rod, deflection appears in the axial line of die sleeve and die holder, core rod at the pressure that radially is subjected to of pipe stretching axis with imbalance, the tubing that stretches promptly produces off-centre and bending, the copper pipe eccentricity height of producing under this situation, straight degree can not meet the specification requirement of petroleum pump with copper alloy tube fully, can't realize the production of petroleum pump with copper pipe basically.
This be because: the high precision petroleum pump copper alloy tube is a kind of novel high-tech energy-conserving product, and it requires the strictness of inside/outside diameter size precision, surfaces externally and internally fineness, circularity, straight degree well, wall thickness is even.Such as petroleum pump to require with the straight degree of copper alloy tube be that the maximum flexion that allows on any 3 feet (914.4mm) length is 0.03 inch (0.762mm); Straight degree is very important, because every copper pipe buying with this standard all should have accurate straight degree, is ground the back a little and directly is used as the deep-well pump barrel.Product inspection is that to make 6 feet (1828.8mm) diameter tolerances of a length be 0.001～0.002 inch (0.025～0.050mm) bearing pin passing through from the beginning to the end to a finished product pump barrel; High precision petroleum pump is eccentricity≤4% with the copper alloy tube concentricity requirement, is eccentricity≤2% when the strictest, the computing formula of eccentricity: eccentricity=(thickest-minimum wall thickness (MINI W.))/(thickest+minimum wall thickness (MINI W.)).Copper pipe (straight degree requirement is 2.5mm/M when the strictest, is eccentricity≤10% when concentricity requirement is the strictest) with respect to other purposes.
This shows the technical conditions height of petroleum pump with copper alloy tube, thereby the also corresponding complexity of processing technology, non-common drawing die device can be produced.
(3) summary of the invention:
As everyone knows, the application of floating core head, brought copper tube coil production develop by leaps and bounds, when drawing just because of the copper tube dish, used unfixed stretching internal mold (floating core head), its principle is: copper tube is in drawing process, and metal produces internal stress because of plastic deformation, because of not fixing of stretching internal mold (floating core head), thereby can regulate its position automatically to impel the dynamic equilibrium of internal stress, produce concentricity height, dimensional accuracy homogeneous, balancing performance, the unrestricted tubing of length.The objective of the invention is function, designed and developed a kind of stretching device that can satisfy high concentricity and Gao Zhidu requirement, be used to produce high precision petroleum pump usefulness copper alloy tube according to floating core head autobalance internal stress.
Can realize the stretching device that is used to produce high precision petroleum pump usefulness copper alloy tube of above-mentioned purpose, comprise stretching facility and mould, different is:
Described mould comprises die sleeve and the core rod that cooperates with the die sleeve concentric, and mould can universally rotate with respect to die holder.
The adapted floating core head, when utilization comes the drawing pipe with the stretch forming equipment of universal rotation mould, metal produces internal stress because of plastic deformation, the stretching internal mold radially is subjected to from pipe distortion and the pressure that produces along the stretching axis, this moment is owing to floating core head is fixing, because of being subjected to force unbalance, the position of floating core head will produce skew automatically, again can universal rotation in die holder because of mould, rotation by mould is consistent the pipe axis all the time with the tensile force direction, thereby make floating core head, the pressure that mould is subjected to is returned to poised state, and according to the relation of active force and reaction force, the internal stress of stretching pipe restores balance.In whole drawing process, the internal stress of pipe remains dynamic equilibrium, and the pipe axis is consistent with the tensile force direction all the time simultaneously, therefore guarantees to produce the pipe of high concentricity, Gao Zhidu.
Die sleeve in the mould can be respectively concentric spherical outside surface and internal ball hole with the face of being rotatably assorted of die holder, for making the rotation between die sleeve and the die holder flexible, can install tourelle between the spherical mating surface of die sleeve and die holder.
Described tourelle is preferably selected spherical rolling bearing for use.
, installation simple angle reasonable from manufacturing process, the mating surface of described die sleeve and die holder can be hemisphere face; Supporting with it spherical rolling bearing is then selected the hemisphere rolling bearing for use.
Advantage of the present invention:
1, the present invention adopts the fit structure of mould universal rotation in die holder, be equipped with floating core head as internal mold, make the mould can be from the direction of motion tracking tensile force, the pipe axis direction with tensile force all the time be consistent, and therefore the metal straight pipe pipe concentricity height of producing, straight degree are high.
2, owing to adopt the fit structure of mould universal rotation in die holder, make the glacing flatness of stretching device walking no longer produce decisive influence to the straight tube pipe, removed adjustment and the maintenance regular to a great extent from, reduced unnecessary manpower, financial resources, waste of time stretching device.
(4) description of drawings:
Fig. 1 is the stretching structure schematic diagram of one embodiment of the present invention.
Figure number sign: 1, die holder; 2, die sleeve; 3, hemisphere rolling bearing; 4, the core rod that moves about; 5, pipe; 6, core rod.
(5) specific embodiment:
------(floating mould) extruding---stretching (the pulling out)---annealing process of (or semicontinuous) casting continuously according to melting, the stretching device that utilizes the present invention to be used to produce copper alloy pipe for high precision petroleum pump stretches to pipe, just can produce the petroleum pump copper alloy straight tube of high concentricity, Gao Zhidu.
The stretching device that the present invention is used to produce copper alloy pipe for high precision petroleum pump is a horizontal type structure.As shown in Figure 1, the present invention includes stretching facility and mould, wherein mould comprises die sleeve 2 and core rod 6 again; The die holder 1 that cooperates with die sleeve in the mould 2 is fixedly mounted on the stretching device, its axial line and horizontal stretch dead in line; Draw direction inwardly offers the hemisphere endoporus in the end face upper edge of die holder 1, the center of circle of hemisphere endoporus is positioned on the axis of die holder 1, the other end of die holder 1 inwardly offers the axis hole with die holder 1 coaxial line, this axis hole and hemisphere endoporus intersect pass through after, the hemisphere endoporus becomes the round platform endoporus that diminishes along the draw direction diameter.
As shown in Figure 1, die sleeve 2 is made and the concentric hemisphere of die holder 1 hemisphere endoporus, inwardly offer axis hole and taper hole with core rod 6 suits successively in the bottom surface of die sleeve 2 along hemispheroidal axis, the diameter of taper hole less than with the axis hole of core rod 6 suits, also less than the axis hole of die holder 1 end face; After described taper hole and die sleeve 2 hemispheroidal roof intersection are passed through, form the little round platform in big top, the end.
As shown in Figure 1, cylindric core rod 6 is fixed with the axis hole concentric suit of die sleeve 2, the thickness of core rod 6 is identical with the length of die sleeve 2 axis holes, matches with floating core head 4 with the stretching endoporus of core rod 6 concentrics, is formed on the drawing gap that big metal straight pipe is drawn into little metal straight pipe along draw direction.
As shown in Figure 1, along draw direction, hemisphere platform shape die sleeve 2 matches with the round platform endoporus of die holder 1, also is provided with hemisphere rolling bearing 3 between die sleeve 2 that matches and the die holder 1, and contacts with the ball face of die sleeve 2 and die holder 1 respectively.
In drawing process as shown in Figure 1, draw direction from left to right, floating core head 4 is packed in the pipe 5 and is arrived end reducing place of pipe 5 system heads, pipe 5 passes the endoporus of core rod 6 and stretches outside die holder 1, the clamping head of stretching dolly is clamped pipe 5 system head positions and is pulled out to the right, because the universal rotation of core rod 2, stretched petroleum pump is very high with the straight degree and the concentricity of copper alloy tube, can satisfy the maximum flexion that allows on any 3 feet (914.4mm) length is the same straight degree requirement of 0.03 inch (0.762mm), and the concentricity requirement of eccentricity≤2%.
Claims (6)
1, be used to produce the stretching device of high precision petroleum pump, comprise stretching facility and mould, it is characterized in that with copper alloy tube:
Mould comprises die sleeve (2), die holder (1) and core rod (6), and core rod (6) concentric is set in the die sleeve (2), and die sleeve (2) is cooperating with die holder (1) with respect to the mode of the fixedly universal rotation of die holder (1).
2, according to claim 1 being used to produced the stretching device that high precision petroleum pump is used copper alloy tube, and it is characterized in that: die sleeve (2) is respectively concentric spherical outside surface and internal ball hole with the face of being rotatably assorted of die holder (1).
3, according to claim 2 being used to produced the stretching device that high precision petroleum pump is used copper alloy tube, it is characterized in that: be installed on tourelle between described spherical outside surface, the internal ball hole mating surface.
4, the stretching device that is used to produce copper alloy pipe for high precision petroleum pump according to claim 3 is characterized in that: described tourelle is spherical rolling bearing.
5, according to the described any stretching device that is used to produce copper alloy pipe for high precision petroleum pump of claim 2～4, it is characterized in that: the described face of being rotatably assorted is a hemisphere face.
6, the stretching device that is used to produce copper alloy pipe for high precision petroleum pump according to claim 4 is characterized in that: described spherical rolling bearing is hemisphere rolling bearing (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100487597A CN100471591C (en) | 2007-03-23 | 2007-03-23 | Stretcher for producing copper alloy pipe for high precision petroleum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100487597A CN100471591C (en) | 2007-03-23 | 2007-03-23 | Stretcher for producing copper alloy pipe for high precision petroleum pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101020198A CN101020198A (en) | 2007-08-22 |
| CN100471591C true CN100471591C (en) | 2009-03-25 |
Family
ID=38708120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100487597A Expired - Fee Related CN100471591C (en) | 2007-03-23 | 2007-03-23 | Stretcher for producing copper alloy pipe for high precision petroleum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100471591C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101837382B (en) * | 2009-03-20 | 2012-01-25 | 周晓辉 | Production method and device of copper tube used by conductive nozzle |
| CN101811139B (en) * | 2010-04-23 | 2011-10-05 | 东莞市科力钢铁线材有限公司 | Spherical rolling mould device |
| CN102248021A (en) * | 2011-06-24 | 2011-11-23 | 浙江伦宝金属管业有限公司 | Cold-drawing steel tube mould base |
| CN103639214A (en) * | 2013-11-28 | 2014-03-19 | 青岛蓝图文化传播有限公司市南分公司 | Coil drawing process of red copper tube for air conditioner |
| CN105489319A (en) * | 2016-01-05 | 2016-04-13 | 中利科技集团（辽宁）有限公司 | Rotary conductor pulling mold for electric wire cable |
| CN106269977A (en) * | 2016-08-07 | 2017-01-04 | 嘉兴市杰希希管道工程有限公司 | A kind of small-bore stainless steel tube drawing production process |
| CN111656127B (en) * | 2018-01-22 | 2022-08-30 | 雷金纳德·盖尔斯蒂恩 | Method and device for measuring diameter of cylindrical measuring pin |
| CN108555045A (en) * | 2018-05-10 | 2018-09-21 | 浙江海亮股份有限公司 | A kind of tube-drawing mold |
| CN111545582A (en) * | 2020-06-16 | 2020-08-18 | 重庆工程职业技术学院 | Stretching trolley and double-head automatic stretching machine thereof |
-
2007
- 2007-03-23 CN CNB2007100487597A patent/CN100471591C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101020198A (en) | 2007-08-22 |
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Granted publication date: 20090325 Termination date: 20160323 |