CN101829695B - Novel strong lubrication floating core head assembly - Google Patents
Novel strong lubrication floating core head assembly Download PDFInfo
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- CN101829695B CN101829695B CN201010186996A CN201010186996A CN101829695B CN 101829695 B CN101829695 B CN 101829695B CN 201010186996 A CN201010186996 A CN 201010186996A CN 201010186996 A CN201010186996 A CN 201010186996A CN 101829695 B CN101829695 B CN 101829695B
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Abstract
The invention discloses a novel strong lubrication floating core head assembly which comprises a stretching core bar, a floating core head and a connecting screw rod for connecting the stretching core bar and the floating core head, wherein an oil pore channel I is arranged in the stretching core bar; an oil storage chamber is arranged in the floating core head; an oil pore channel II which is used for communicating the oil pore channel I with the oil storage chamber is arranged in the connecting screw rod; and a plurality of oil spray through holes which are communicated with the oil storage chamber are radially and annularly distributed on the wall body of the floating core head. The structure and shape designs of the strong lubrication floating core head ensure that lubricating oil can be accurately and evenly sprayed into a lubrication wedge in the stretching process, the lubrication wedge has enough lubricating oil, and the hydrodynamic pressure in the lubrication wedge, namely, the lubrication wedge effect is improved, thereby reducing the electric energy consumption and the stretching force in the process of stretching straight pipes, improving the stretching efficiency of the pipes, prolonging the service life of the floating core head and having the advantages of energy saving and environment protection.
Description
Technical field
The present invention relates to a kind of lubrication floating core head assembly that is used for vertical bar shape drawing pipe, belong to stress metal die for processing design and manufacturing technology field.
Background technology
At present; The processing and manufacturing of domestic vertical bar shape metal pipe material generally adopts floating core head to stretch, and floating core head mainly is to be used for the drawing copper pipe; With the supporting use of pipe drawing-die; Floating core head is not fixedly connected in copper pipe, and the reaction force through with the frictional force of copper pipe and copper pipe distortion the time reaches a poised state, so the title floating core head.
In traditional floating core head drawing process, the lubricating system of internal surface of pipe has two kinds: first kind is the nozzle opening ejection that lubricating oil passes through hollow core bar front end, sticks to inner surface of tube; Play lubricated, cooling effect, but in the practical operation, in view of the difference of design and operation; Be separated with a segment distance between hollow core bar nozzle opening and the floating core head reducing active section, the lubricating oil of nozzle opening ejection can not directly get into lubricated wedge, makes that the interior lubricating oil that stores of lubricated wedge is not enough; Lubricated inhomogeneous; Be difficult to abundant effective lubricating and take away the heat that distortion produces, tensile force is increased, the floating core head wearing and tearing are very fast; Is " CN02215573.2 " like China national Patent Office on 01 29th, the 2003 disclosed patent No.s; The patent that name is called " the drawing die device that is used for large-caliber thin-walled copper pipe " has proposed the drawing die device of the accurate thin-wall copper pipe of a kind of heavy caliber; Stretching core head afterbody in this patent has connected the connector of band nozzle opening and the long core bar of band lubricating oil through hole thereof successively; Be lubricated by the ejection of the nozzle opening on the connector lubricating oil during stretching, its shortcoming as stated; Second kind is that immersion type is lubricated, earlier tubing to be processed is put into oil-way and soaks, and drains the lubricating oil in the pipe again; With stretching on tubing handling to the stretching-machine stock shelf, the shortcoming of this mode is then: in the drawing process, lubricating oil is prone to flow out the invalid loss that tubing pollutes surrounding enviroment and causes lubricating oil; The outflow of lubricating oil causes the residual lubricating oil of internal surface of pipe not enough, makes tensile force increase equally, and the floating core head wearing and tearing are accelerated; As China national Patent Office on July 9th, 2008 the disclosed patent No. be " 200720045387.8 ", name is called in the patent of " stretching core head of hollow metal pipe " and has proposed the less stretching core head of a kind of core print resistance, has adopted in stretching core head one side an acclivitous distortion section is set; It is big in deformation section frictional force to solve tubing and stretching core head; Lubrication oil consumption is big, the unsettled shortcoming of drawing pipe size, but before stretching; Need earlier moderate lubrication oil to be injected in tubing inside and be lubricated, its shortcoming as stated.
Except that above-mentioned deficiency; Traditional floating core head is to rely on the screw thread at connecting screw rod two ends to be connected with the stretching core bar; The front end of floating core head and the adjustment of the spacing of nut are improper; Floating core head moves axially deficiency or can not move axially, and has lost the superiority that floating core head stretches, and the stability in the drawing process weakens.Also there is similar problem in above-mentioned " CN02215573.2 " and " 200720045387.8 " two pieces of patents.Therefore the problem that exposes in drawing process to traditional floating core head is necessary to propose a kind of strong lubricated floating core head assembly design, the purpose that reduce tensile force to reach, improves floating core head long service life and energy-saving and environmental protection.
Summary of the invention
Problem to be solved by this invention just provides a kind of novel strong lubrication floating core head assembly simple in structure, and the tensile force when effectively reducing the vertical bar drawing pipe in the service life of improving drawing pipe efficient and floating core head, also has the advantage of energy-saving and environmental protection.
For solving the problems of the technologies described above; The present invention adopts following technical scheme: a kind of novel strong lubrication floating core head assembly; Comprise the connecting screw rod that stretching core bar, floating core head and connection stretching core bar and floating core head are used; Be provided with oil through road I in the said stretching core bar; It is characterized in that: be provided with shoe cream room in the said floating core head, be provided with the oil through road II that is communicated with oil through road I and shoe cream room in the said connecting screw rod, radial loop is furnished with several oil spout through holes that communicates with shoe cream room on the wall body of said floating core head.
Further, said floating core head is made up of Strain During Finishing Stage that is used to control size of pipe and tubing and the active section that is used for the shaping guiding, and described active section is connected with connecting screw rod, and described shoe cream room is located at active section inside.
Further, the profile of said active section is awl drum type small in the end and big in the middle, and described oil spout through hole is distributed in the position near the active section middle part.
Further, the lubricated wedge lopsidedness of the taper that between floating core head active section conical surface and pipe material inner wall, forms of the oil-out of described oil spout through hole.Lubricating oil in the shoe cream room can directly get in the lubricated wedge of taper after the duct ejection of gushing, and shortens the oil spout spacing.
Further, said connecting screw rod afterbody and stretching core bar be through being threaded, and the head of said connecting screw rod stretches into that the active section of its body of rod and floating core head is slidingly connected in the shoe cream room.
Further, said connecting screw rod head is provided with radially outward the spacing protruding eaves that extends, and the back cavity wall of said spacing protruding eaves and shoe cream room offsets and limits floating core head and in stretching, deviate from connecting screw rod.
Beneficial effect of the present invention:
The planform design of the strong lubricating oil floating core head of the present invention guarantees in drawing process, can lubricating oil accurately evenly be sprayed in the lubricated wedge; Sufficient lubricating oil is arranged in the lubricated wedge and improve the promptly lubricated wedge effect of hydrodynamic pressure in the lubricated wedge, lubricating oil film separates the contact surface of inner surface of tube and floating core head fully, and takes away the heat that produces because of distortion; Realize best fluid friction condition; Thereby the reduction coefficient of friction reduces tensile force, reduces power consumption; Alleviate simultaneously the metal adhesion and the wearing and tearing on floating core head surface to greatest extent, reduced the cost of mould;
The syndeton design in connecting screw rod and oil storage storehouse; Guarantee in drawing process; This floating core head is along with the fluctuation of normal pressure, frictional force, can realize under responsive to axial force that floating core head is axially regulated automatically to move about, and improved the stability that floating core head stretches; Avoid pulling out periodically annular ripple waste product generation of tube surfaces, improved the lumber recovery of tubing;
In the drawing process, be injected in lubricating oil in the lubricated wedge through the oil spout through hole and can not flow to tubing and pollute outward, reduced lubricated effective consumption, save cost, make the present invention also possess the advantage of energy-saving and environmental protection.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further described:
Fig. 1 is a floating core head assembly stretching structure sketch map of the present invention.
The specific embodiment
As shown in Figure 1; The invention provides a kind of novel strong lubrication floating core head assembly; Comprise stretching core bar 3, floating core head 1 and the connecting screw rod 2 that connects stretching core bar 3 and floating core head 1 usefulness; Be provided with oil through road I 31 in the said stretching core bar 3; Be provided with shoe cream room 121 in the said floating core head 1, be provided with the oil through road II 21 that is communicated with oil through road I 31 and shoe cream room 121 in the said connecting screw rod 2, radial loop is furnished with several oil spout through holes 122 that communicates with shoe cream room 121 on the wall body of said floating core head 1.Floating core head 1 is made up of the active section 12 that is used to control the Strain During Finishing Stage 11 of tubing 6 sizes and be used for the shaping guiding, and described active section 12 is connected with connecting screw rod 2, and described shoe cream room 121 is located at active section 12 inside; The profile of active section 12 is awl drum type small in the end and big in the middle; Adopt the active section 12 of this awl drum type structure as floating core head 1; Frictional force between tubing 6 and the floating core head 1 distortion section be can reduce, thereby the suffered resistance of floating core head 1, the service life of improving floating core head 1 reduced; Also can guarantee simultaneously the stretching quality of tubing 6 surfaces externally and internallies, improve product percent of pass; Described oil spout through hole 122 is distributed in the position near active section 12 middle parts; Wedge 4 lopsidedness are lubricated in the taper that the oil-out of oil spout through hole 122 forms between floating core head 1 active section, 12 conical surfaces and tubing 6 inwalls.Lubricating oil in the shoe cream room 121 can directly get in the lubricated wedge 4 of taper after the duct ejection of gushing, and shortens the oil spout spacing.
Connecting screw rod 2 afterbodys and stretching core bar 3 be through being threaded, and the head of said connecting screw rod 2 stretches into that the active section 12 of its bodies of rod and floating core head 1 is slidingly connected in the shoe cream room 121; Connecting screw rod 2 heads are provided with radially outward the spacing protruding eaves 22 that extends, and the back cavity wall of said spacing protruding eaves 22 and the shoe cream room 121 restriction floating core head 1 that offsets is deviate from connecting screw rod 2 in stretching.
The step that stretches is following:
The front end of pipe embryo make earlier one with the chuck of managing the embryo one; Cross through stretcher and draw copper pipe, this stretcher has comprised inner stretching die 5 and the floating core head assembly of the present invention that has stretchable holes.When drawing copper pipe; Transporting the pipe embryo earlier makes floating core head 1 stretch into the clip position of pipe embryo; Stretching core bar 3 promotion pipe proembryos are moved the chuck end of pipe embryo are stretched in the stretchable holes; Being moved forward by the chuck of stretching dolly traction tube embryo stretches to the pipe embryo again, realizes down managing in the inside and outside acting in conjunction of floating core head 1 and stretchable holes that the embryo external diameter reduces gradually, wall thickness attenuate gradually, reaches the size and dimension of regulation.At above-mentioned pulling process, lubricating oil is I 31, oil through road II 21, shoe cream room 121 through the oil through road under pressure, by oil spout through hole 122 lubricating oil is sprayed in the lubricated wedge 4 at last, realizes the lubricated stretching of high current body.
Strong lubrication floating core head of the present invention and the contrast of traditional floating core head stretching aluminum bronze tube; See the effect data contrast (the XQ floating core head is a strong lubrication floating core head of the present invention, and the CT floating core head is traditional floating core head) of strong lubrication floating core head of the present invention and traditional floating core head stretching C60800 aluminium bronze pipe in the table 1 for details:
Table 1
Can know that from table 1 strong lubrication floating core head of the present invention is compared with traditional floating core head, the passage tensile force reduces by 10～23.4%; 3.6Kw/h on average per hour economizes on electricity; And on average each strong lubrication floating core head pulls the about 3000m/ of tubing than traditional floating core head; The tube surfaces quality is improved significantly.
Claims (6)
1. novel strong lubrication floating core head assembly; Comprise stretching core bar (3), floating core head (1) and the connecting screw rod (2) that connects stretching core bar (3) and floating core head (1) usefulness; Be provided with oil through road I (31) in the said stretching core bar (3); It is characterized in that: be provided with shoe cream room (121) in the said floating core head (1); Be provided with the oil through road II (21) that is communicated with oil through road I (31) and shoe cream room (121) in the said connecting screw rod (2), radial loop is furnished with several oil spout through holes (122) that communicates with shoe cream room (121) on the wall body of said floating core head (1).
2. a kind of novel strong lubrication floating core head assembly according to claim 1; It is characterized in that: said floating core head (1) is by the Strain During Finishing Stage (11) and active section (12) formation that is used for the shaping guiding that are used to control tubing (6) size; Described active section (12) is connected with connecting screw rod (2), and described shoe cream room (121) is located at active section (12) inside.
3. a kind of novel strong lubrication floating core head assembly according to claim 2; It is characterized in that: the profile of said active section (12) is awl drum type small in the end and big in the middle, and described oil spout through hole (122) is distributed in the position near active section (12) middle part.
4. a kind of novel strong lubrication floating core head assembly according to claim 3 is characterized in that: wedge (4) lopsidedness is lubricated in the taper that the oil-out of described oil spout through hole (122) forms between floating core head active section (12) conical surface and tubing (6) inwall.
5. according to claim 2 or 3 or 4 described a kind of novel strong lubrication floating core head assemblies; It is characterized in that: said connecting screw rod (2) afterbody and stretching core bar (3) are through being threaded; The head of said connecting screw rod (2) stretches in the shoe cream room (121), and the active section (12) of the body of rod of said connecting screw rod (2) and floating core head (1) is slidingly connected.
6. a kind of novel strong lubrication floating core head assembly according to claim 5; It is characterized in that: said connecting screw rod (2) head is provided with radially outward the spacing protruding eaves (22) that extends, and the back cavity wall of said spacing protruding eaves (22) and shoe cream room (121) the restriction floating core head that offsets is deviate from connecting screw rod (2) in stretching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010186996A CN101829695B (en) | 2010-05-31 | 2010-05-31 | Novel strong lubrication floating core head assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010186996A CN101829695B (en) | 2010-05-31 | 2010-05-31 | Novel strong lubrication floating core head assembly |
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| CN101829695A CN101829695A (en) | 2010-09-15 |
| CN101829695B true CN101829695B (en) | 2012-10-17 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106890860B (en) * | 2017-03-02 | 2019-05-14 | 王定锋 | A kind of vertical bar stretch brass tube strip off the skin, drawing process |
| CN108176723A (en) * | 2018-03-14 | 2018-06-19 | 江阴市洪腾机械有限公司 | A kind of cold drawing die for having saponification function |
| CN108580571A (en) * | 2018-04-27 | 2018-09-28 | 海亮（安徽）铜业有限公司 | A kind of stretching emptying formula diaphragm capsule of copper tube |
| CN109500118B (en) * | 2018-12-26 | 2023-06-09 | 重庆龙煜精密铜管有限公司 | Anti-jump moving core head and copper pipe reducing drawing anti-jump method |
| CN109675945B (en) * | 2018-12-28 | 2020-05-01 | 张家港华程特种材料股份有限公司 | Pipe drawing forming device |
| CN111014482A (en) * | 2019-11-29 | 2020-04-17 | 浙江海亮股份有限公司 | Flaring core print |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2358838A (en) * | 1943-03-17 | 1944-09-26 | Bridgeport Brass Co | Floating type mandrel for tube drawing |
| DE1527831A1 (en) * | 1966-08-05 | 1970-01-15 | Mathias Nolden | Tool and method for cold drawing of pipes and hollow profiles |
| JP3504967B2 (en) * | 1994-01-31 | 2004-03-08 | アイシン精機株式会社 | METHOD AND APPARATUS FOR MANUFACTURING BENDED TUBE WITH NON-CIRCULAR SECTION |
| CN2532923Y (en) * | 2002-02-04 | 2003-01-29 | 张民苏 | Stretching die device for large diameter thin-wall copper pipe |
| CN201082438Y (en) * | 2007-08-27 | 2008-07-09 | 高新张铜股份有限公司 | Drafting core head for hollow metal tube |
| CN201735619U (en) * | 2010-05-31 | 2011-02-09 | 浙江海亮股份有限公司 | Novel excellent-lubricating moving core assembly |
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