CN101987512B - Method for producing steel belt enhanced polyethylene helical bellows for pre-eliminating steel belt stress - Google Patents
Method for producing steel belt enhanced polyethylene helical bellows for pre-eliminating steel belt stress Download PDFInfo
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- CN101987512B CN101987512B CN 200910305137 CN200910305137A CN101987512B CN 101987512 B CN101987512 B CN 101987512B CN 200910305137 CN200910305137 CN 200910305137 CN 200910305137 A CN200910305137 A CN 200910305137A CN 101987512 B CN101987512 B CN 101987512B
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- flexibility
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Abstract
The invention relates to a method for producing steel belt enhanced polyethylene helical bellows for pre-eliminating steel belt stress. The method comprises the following steps of: (1) molding an inner layer; (2) pressing and molding a steel belt; (3) bending and winding the steel belt; and (4) molding an outer layer. The method adopts the main technical characteristics that in the step of bending and winding a steel belt, for a steel belt lower than a standard yield strength range, the flexibility of the steel belt bent by a bending machine is a negative value, and for a steel belt higher than the standard yield strength range, the flexibility of the steel belt bent by the bending machine is a positive value, wherein the steel belt flexibility=(Dstandard-Dactual)/Dstandard*100 percent. In the invention, aiming at bellows with different specifications and the steel belts with different yield strengths, different flexibilities are used for bending in a pressing process of the steel belts, thereby the rebound stress of the steel belt is sufficiently eliminated, the compound bonding strength is enhanced, the manufactured rate, the stability and the quality of products are improved, and the safe and reliable running of the products is guaranteed.
Description
Technical field
The present invention relates to the production method of steel band reinforced polyethylene spiral ripple pipe, especially a kind of steel band reinforced polyethylene spiral ripple pipe production method of the steel band stress that disappears in advance.
Background technology
Because steel band reinforced polyethylene spiral ripple pipe has characteristics such as high rigidity, high strength and corrosion-resistant, wear-resistant and pliability are strong, therefore, its steel-plastics composite pipe as a kind of high performance-price ratio is widely used in fields such as draining.The structure of steel band reinforced polyethylene spiral ripple pipe is: internal layer is the polyethylene inner layer pipe of continuous real wall, and outer winding of inner tube is compounded with by applying the V font steel band that steel band is pressed into, and outside interior pipe layer and V font steel band, is compounded with outer layer of polyethene.It is whole that steel band reinforced polyethylene spiral ripple pipe is processed firm steel band reinforced polyethylene spiral ripple pipe through inner tube forming process, steel band compression moulding process, the crooked winding process of steel band and the outer forming process of bellows.In the crooked winding process of steel band, steel band need pass through and reach the yield point state after the brake forming and can guarantee that the steel ring diameter is in stable state, and promptly steel band reaches yield limit, and at this moment, it is best that the quality of steel band reinforced polyethylene spiral ripple pipe reaches.But in actual production process, tubing manufacturer does not often consider the yield strength of strip material itself; All adopt identical degree of crook to carry out bending since the yield strength of strip material widely different (160～250MPa), therefore; Adopt same degree of crook can not guarantee that steel band reaches yield limit; Make steel band have certain resilience stress, cause tube forming difficulty and break easily that compound sticking is not firm; Be easy to generate lamination problem, when installing and use, have certain potential safety hazard.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of steel band reinforced polyethylene spiral ripple pipe production method that can eliminate the firm steel band stress that disappears in advance of steel band screen resilience, the easy moulding of tubing and compoiste adhering is provided.
The present invention solves its technical problem and takes following technical scheme to realize:
A kind of steel band reinforced polyethylene spiral ripple pipe production method of the steel band stress that disappears in advance may further comprise the steps:
(1) uses internal layer extruder polyethylene extrusion band material and welding internal layer forming step as inner tube;
(2) use make-up machine will apply the steel band compression moulding step of steel band compacting forming V-shape steel band;
(3) the use bending machine carries out bending with the V-arrangement steel band and is wrapped in the crooked winding step of the outer steel band of inner tube;
(4) use outer extruder with the outer forming step of polyethylene band material welding outside interior pipe layer and V-arrangement steel band;
The present invention is in crooked winding of steel band of step (3); For the steel band that is lower than standard yield strength scope, the steel band flexibility that bending machine bent is a negative value, for the steel band that is higher than standard yield strength scope; The steel band flexibility that bending machine bent on the occasion of, wherein:
Steel band flexibility=(D
Mark-D
Real)/D
Mark* 100%
In the formula:
D
Mark: when the steel band yield strength is standard yield strength scope, steel band brake forming diameter;
D
Real: in the crooked also Wrapping formed step of steel band, steel band brake forming diameter.
And the steel band flexibility that described bending machine bent meets the following conditions:
When the steel band yield strength was lower than standard yield strength scope, the steel band flexibility was between-3%～-0.05%; When the steel band yield strength was higher than standard yield strength scope, the steel band flexibility was between 0.05%～4%; When the steel band yield strength was in standard yield strength scope, the steel band flexibility was 0.
And described standard yield strength scope is: 180～210MPa.
And the caliber specification of described steel band reinforced polyethylene spiral ripple pipe is 500～2200cm.
Advantage of the present invention and good effect are:
This production method makes full use of existing equipment, to the bellows of different size and the steel band of different yield strengths, steel band is being carried out adopt different flexibility in the BENDING PROCESS; The size of promptly twining through bending machine control steel band reaches yield point when having guaranteed the steel band brake forming, makes the steel band diameter reach stable state; Fully eliminate the resilience stress of steel band, prevented to occur in the forming process problem of tubing craze and transfiguration, improved the ratio of briquetting of tubing; Strengthened the intensity of compound sticking; Its adhesive strength is greater than 70N/cm, and the product row yielding has improved 9.6%, and the shape and size stability of product has improved 5.1%; Guarantee the quality of product, improved security of products and reliability.
The specific embodiment
Below in conjunction with embodiment the present invention is done further detailed description.
A kind of steel band reinforced polyethylene spiral ripple pipe production method of the steel band stress that disappears in advance is to be that the steel band reinforced polyethylene spiral ripple pipe of 500～2200cm carries out to the caliber specification.The yield strength scope of the steel band that uses is between 160～250MPa in the steel band reinforced polyethylene spiral ripple pipe production process, and the yield strength of the producer of different steel bands, the steel band of different batches is all different.Usually can 180～210MPa be defined as standard yield strength scope, 160～210MPa is for being lower than standard yield strength scope, and 210～250MPa is for being higher than standard yield strength scope.Innovative point of the present invention is when bringing line bend into to the bellows of different size and different yield strength steel; Twine size through bending machine control steel band; That is to say its flexibility of control within the specific limits; Can guarantee that in this scope the steel band bending reaches yield point, the steel band diameter reaches stable state, to eliminate the resilience stress of steel band.The steel band reinforced polyethylene spiral ripple pipe production method of this steel band stress that disappears in advance may further comprise the steps:
(1) uses internal layer extruder polyethylene extrusion band material and welding internal layer forming step, in this step, prepare the inner tube of steel band reinforced polyethylene spiral ripple pipe as inner tube.
(2) use make-up machine will apply the compression moulding step of steel band compacting forming V-shape steel band, this step will be coated with the steel band of adhering resin and suppress, and the V-arrangement steel band after the compression moulding is used to be wrapped in outside the inner tube.
(3) the use bending machine carries out bending with the V-arrangement steel band and is wrapped in the crooked winding step of the outer steel band of inner tube.In the crooked winding step of steel band, for the steel band that is lower than standard yield strength scope, the steel band flexibility that bending machine bent is a negative value, for the steel band that is higher than standard yield strength scope, the steel band flexibility that bending machine bent on the occasion of, wherein:
Steel band flexibility=(D
Mark-D
Real)/D
Mark* 100%
In the formula:
D
Mark: when the steel band yield strength is standard yield strength scope, steel band brake forming diameter;
D
Real: in the crooked also Wrapping formed step of steel band, steel band brake forming diameter.
(4) use outer extruder with the outer forming step of polyethylene band material welding outside interior pipe layer and V-arrangement steel band, thereby it is whole to form a firm steel band reinforced polyethylene spiral ripple pipe.
In aforementioned production method, the crooked winding step of steel band is a committed step of the present invention, and when bringing line bend into to the bellows of different size and different yield strength steel, the steel band flexibility that bending machine bent meets the following conditions:
When the steel band yield strength is lower than standard yield strength scope, the steel band brake forming diameter of the steel band brake forming diameter overgauge yield strength scope that bending machine bends, and the steel band flexibility is controlled between-3%～-0.05%; When the steel band yield strength was higher than standard yield strength scope, the steel band brake forming diameter that bending machine bends was less than the steel band brake forming diameter of standard yield strength scope, and the steel band flexibility is controlled between 0.05%～4%; When steel band yield strength during in standard yield strength scope, the steel band flexibility is 0, and the steel band brake forming diameter that bending machine bends is the steel band brake forming diameter of standard yield strength scope.
In the actual flexion winding step; Only need control parameter through the control bending machine; Can realize steel band is bent into the steel band of required diameter and it is wrapped in according to certain pitch on the skin of inner tube pipe layer and bond together in the adhering resin through steel strip surface is bonded in it with outer layer of polyethene.
To bellows, the steel band yield strength of different size, requiring that the steel band flexibility is satisfied is as shown in the table:
Can find out from last table; For being lower than standard yield strength scope (when 160～180MPa) V-arrangement steel band carries out bending; The diameter of the steel band brake forming of the diameter of bending machine after under should the overgauge yield strength with the steel band brake forming; When carrying out bending for the steel band that is higher than standard yield strength scope, the diameter of bending machine after with the steel band brake forming should be less than the diameter of the steel band brake forming under the standard yield strength.Thereby making steel band to pass through to reach the yield point state after the brake forming to guarantee that the steel ring diameter is in stable state, and promptly steel band reaches yield limit, and at this moment, it is best that the quality of steel band reinforced polyethylene spiral ripple pipe reaches.
The effect his-and-hers watches that use above-mentioned explained hereafter and existing explained hereafter steel band reinforced polyethylene spiral ripple pipe are please with reference to following table:
Can find out that by last table technology of the present invention all is significantly improved in geomery stability and product row yielding.
It is emphasized that; Embodiment of the present invention is illustrative; Rather than it is determinate; Therefore the present invention is not limited to the embodiment described in the specific embodiment, and every other embodiments that drawn by those skilled in the art's technical scheme according to the present invention belong to the scope that the present invention protects equally.
Claims (3)
1. the steel band reinforced polyethylene spiral ripple pipe production method of the steel band stress that disappears in advance may further comprise the steps:
⑴ use internal layer extruder polyethylene extrusion band material and the welding internal layer forming step as inner tube;
⑵ use make-up machine will apply the steel band compression moulding step of steel band compacting forming V-shape steel band;
⑶ use bending machine that the V-arrangement steel band is carried out bending and be wrapped in the crooked winding step of the outer steel band of inner tube;
⑷ use outer extruder with the outer forming step of polyethylene band material welding outside interior pipe layer and V-arrangement steel band;
It is characterized in that: in crooked winding of steel band of step ⑶; For the steel band that is lower than standard yield strength scope, the steel band flexibility that bending machine bent is a negative value, for the steel band that is higher than standard yield strength scope; The steel band flexibility that bending machine bent on the occasion of, wherein:
Steel band flexibility=(D
Mark-D
Real)/D
Mark* 100%
In the formula:
D
Mark: when the steel band yield strength is standard yield strength scope, steel band brake forming diameter;
D
Real: in the crooked also Wrapping formed step of steel band, steel band brake forming diameter;
Described standard yield strength scope is: 180～210MPa.
2. the steel band reinforced polyethylene spiral ripple pipe production method of the steel band stress that disappears in advance according to claim 1 is characterized in that: the steel band flexibility that described bending machine bent meets the following conditions:
When the steel band yield strength was lower than standard yield strength scope, the steel band flexibility was between-3%～-0.05%; When the steel band yield strength was higher than standard yield strength scope, the steel band flexibility was between 0.05%～4%; When the steel band yield strength was in standard yield strength scope, the steel band flexibility was 0.
3. the steel band reinforced polyethylene spiral ripple pipe production method of the steel band stress that disappears in advance according to claim 1 is characterized in that: the caliber specification of described steel band reinforced polyethylene spiral ripple pipe is 500～2200cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910305137 CN101987512B (en) | 2009-08-03 | 2009-08-03 | Method for producing steel belt enhanced polyethylene helical bellows for pre-eliminating steel belt stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910305137 CN101987512B (en) | 2009-08-03 | 2009-08-03 | Method for producing steel belt enhanced polyethylene helical bellows for pre-eliminating steel belt stress |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101987512A CN101987512A (en) | 2011-03-23 |
| CN101987512B true CN101987512B (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910305137 Expired - Fee Related CN101987512B (en) | 2009-08-03 | 2009-08-03 | Method for producing steel belt enhanced polyethylene helical bellows for pre-eliminating steel belt stress |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2595554Y (en) * | 2002-08-26 | 2003-12-31 | 李志雄 | Stable composite pipe forming device |
| CN1693054A (en) * | 2005-04-22 | 2005-11-09 | 甘国工 | Production method and apparatus of steel wire reinforced composite plastic pipe |
| CN1702242A (en) * | 2005-07-07 | 2005-11-30 | 哈尔滨工业大学星河实业有限公司 | Steel band reinforced plastic drainpipe and method and apparatus for manufacturing the same |
-
2009
- 2009-08-03 CN CN 200910305137 patent/CN101987512B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2595554Y (en) * | 2002-08-26 | 2003-12-31 | 李志雄 | Stable composite pipe forming device |
| CN1693054A (en) * | 2005-04-22 | 2005-11-09 | 甘国工 | Production method and apparatus of steel wire reinforced composite plastic pipe |
| CN1702242A (en) * | 2005-07-07 | 2005-11-30 | 哈尔滨工业大学星河实业有限公司 | Steel band reinforced plastic drainpipe and method and apparatus for manufacturing the same |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2004-337969A 2004.12.02 |
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| CN101987512A (en) | 2011-03-23 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Liaoning Shengxiang Plastic Pipe Industry Co., Ltd. Assignor: Tianjin Shengxiang Plastic Pipe Industry Co., Ltd. Contract record no.: 2012210000041 Denomination of invention: Method for producing steel belt enhanced polyethylene helical bellows for pre-eliminating steel belt stress License type: Common License Open date: 20110323 Record date: 20120312 |
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