CN104353673A - Fixed diameter reducing machine for eliminating inner squares of steel pipe - Google Patents
Fixed diameter reducing machine for eliminating inner squares of steel pipe Download PDFInfo
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- CN104353673A CN104353673A CN201410611203.4A CN201410611203A CN104353673A CN 104353673 A CN104353673 A CN 104353673A CN 201410611203 A CN201410611203 A CN 201410611203A CN 104353673 A CN104353673 A CN 104353673A
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- steel pipe
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- diameter reducing
- fixed diameter
- roll
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- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention belongs to the technical field of a hot milling seamless steel pipe, and particularly relates to a fixed diameter reducing machine for eliminating inner squares of a steel pipe. The fixed diameter reducing machine comprises a total assembling machine frame, a shaft, a bearing, a milling roller machine frame and milling rollers, wherein the milling rollers are arranged on the milling roller machine frame. The fixed diameter reducing machine is characterized in that the center line of each milling roller of the fixed diameter reducing machine forms an included angle alpha with a connecting line of a hole groove bottom center and a hole center of the milling roller, and in addition, the milling rollers are all in clockwise or anticlockwise direction arrangement. Each milling roller axial line of the original steel pipe fixed diameter reducing machine rotates an angle alpha by using the connecting line of the hole groove bottom center and the hole center of the corresponding milling roller as the axis, so that the steel pipe rotates in the milling process, the thickening sections of each machine frame are staggered, the lamination effect of the thickening sections of the machine frame in the same region is avoided, and the inner square phenomenon of the steel pipe is eliminated. The fixed diameter reducing machine has the advantages that the operation is simple and reliable, the wall thickness precision of the steel pipe can be greatly improved, and particularly, the inner square problem of thick wall pipes can be solved.
Description
Technical field
The invention belongs to the technical field of hot rolled seamless steel tube, especially relate to a kind of size-reducing mill eliminating side in steel pipe.
Background technology
Plug, tube reducing and tension diameter-reducing procedure are the continuous rolling process of hollow body not cored bar, the form of Steel Tube Reducing machine is a lot, can be divided into two rollers, three rollers, four-roller type by roller number, each roll axis is all carrying out tandem rolling perpendicular in the same plane of roll line.If tubing has larger sizing reduction and thick-walled pipe that steel pipe inner wall can be made to form the inner polygon defect such as interior four directions or interior six sides in the size-reducing mill group operation of rolling, reduce the wall thickness accuracy of steel pipe.For three-roll size reducing mill, be illustrated in figure 1 the roll arrangement form of three-roll size reducing mill, steel pipe passes through from the space that three rolls surround.Three rollers to determine in tube reducing six sides produce be additional axial stress along pass circumference skewness, in tube reducing process, because metal is uneven along the flowing on pass width, so thicken also uneven along the wall thickness on pass width.As shown in Figure 2, the unit compression that A point bears is maximum, and this roll linear velocity is minimum, and axial tension stress is minimum; The unit compression that B point bears is minimum, and this roll linear velocity is the highest, and axial tension stress is maximum, and the trend that wall thickness thickens is relatively minimum.It is larger that C point stress state and wall thickness thicken trend.Because in tube reducing frame adjacent rack, the layout of 3 rolls is staggered 60 °, when tension force acquires a certain degree, B point wall thickness is totally in thinning trend, C point wall thickness is totally in thickening trend, every two frames nearly all form one section of section of thickening in this region, many frame sections of thickening superpose at the same area, thus form " interior six sides ".For light-wall pipe, additional axial stress is less for the added influence of wall thickness change, and " interior six sides " phenomenon is not obvious, but for thick-walled pipe, additional axial stress is comparatively large for the added influence of wall thickness change, and " interior six sides " phenomenon is comparatively obvious, causes wall thickness accuracy not meet standard-required.
Summary of the invention
The object of this invention is to provide one and can eliminate size-reducing mill square in the elimination steel pipe of " interior six sides " phenomenon in Sizing Process for Steel Tube.
The object of the invention is to be realized by following technical proposals:
The size-reducing mill of side in elimination steel pipe of the present invention, comprise assembly rack, axle, bearing, roll stand, be arranged on the roll on this roll stand, the center line that it is characterized in that each roll of size-reducing mill is all α with the angle of its roll pass bottom land center and the pass line of centres, and all rolls are all arranged by being all clockwise or being all counterclockwise direction.
Described angle [alpha] is 0.5
0-10
0.
Advantage of the present invention:
In elimination steel pipe of the present invention, the size-reducing mill of side is that axle rotates an angle [alpha] along its roll pass bottom land center and the pass line of centres by the roll axis of original Steel Tube Reducing machine, steel pipe is rotated in the operation of rolling, the section of thickening of each frame has just staggered, without the frame section of thickening in the same area synergistic effect, interior side's phenomenon of steel pipe just eliminates.Operation is simple and reliable in the present invention, can greatly improve thickness of steel pipe precision, particularly can solve square problem in thick-walled pipe.
Accompanying drawing explanation
Fig. 1 is the roll arrangement front view of original three-roll size reducing mill.
Fig. 2 is for the stress schematic diagram of the steel pipe of original three-roll size reducing mill in Sizing Process.
Fig. 3 is roll arrangement front view of the present invention.
Fig. 4 is roll arrangement top view of the present invention.
Fig. 5 is general structure schematic diagram of the present invention.
Detailed description of the invention
The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Fig. 3,4 and 5, the size-reducing mill of side in elimination steel pipe of the present invention, comprise assembly rack, axle, bearing, roll stand, is arranged on the roll on this roll stand, the center line that it is characterized in that each roll of size-reducing mill is all α with the angle of its roll pass bottom land center and the pass line of centres, and all rolls are all arranged by being all clockwise or being all counterclockwise direction.
Described angle [alpha] is 0.5
0-10
0.
As shown in Figure 4, for three-roll size reducing mill, by each roll on the basis of original size-reducing mill, such as roll 1 is that axle rotates an angle [alpha] along its roll pass bottom land center and the pass line of centres, namely the center line of each roll is all α with the angle of its roll pass bottom land center and the pass line of centres, and the roller central line 3 before rotation is α with the angle of postrotational roller central line 2.Other two rolls are also by this rotation alpha, three roller angle [alpha] direction of rotation are identical, namely surround from roll lateral roll and all to rotate clockwise viewed from pass center or all rotate counterclockwise, the operation of rolling of plug is made to become oblique milling from axial rolling, because steel pipe has one slightly to rotate in the operation of rolling, steel pipe is allowed not concentrated by the section of thickening of each frame, the section of thickening of the institute's organic frame passed through does not superpose in same position, make thickening of steel pipe be evenly distributed on steel pipe circumference, interior side's phenomenon of steel pipe just eliminates.
Size-reducing mill frame of the present invention is when designing, the good roll axis of forethought is the angle [alpha] that axle rotates along its roll pass bottom land center and the pass line of centres, after choosing according to parameters such as roll ideal noise diode, frame spacing and passes determine angle [alpha] by calculating, again according to roll locus, configuration roll, axle, bearing and rack.Determine tube reducing memorial archway, roller replacing mode, the kind of drive all not need to change.Operation is simple and reliable in the present invention, can greatly improve thickness of steel pipe precision, particularly can solve square problem in thick-walled pipe.
The present invention also can be used for hot rolled seamless steel tube and determines tube reducing production.
Claims (2)
1. eliminate the size-reducing mill of side in steel pipe for one kind, comprise assembly rack, axle, bearing, roll stand, be arranged on the roll on this roll stand, the center line that it is characterized in that each roll of size-reducing mill is all α with the angle of its roll pass bottom land center and the pass line of centres, and all rolls are all arranged by being all clockwise or being all counterclockwise direction.
2. size-reducing mill square in elimination steel pipe according to claim 1, is characterized in that described angle [alpha] is 0.5
0-10
0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410611203.4A CN104353673A (en) | 2014-11-04 | 2014-11-04 | Fixed diameter reducing machine for eliminating inner squares of steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410611203.4A CN104353673A (en) | 2014-11-04 | 2014-11-04 | Fixed diameter reducing machine for eliminating inner squares of steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104353673A true CN104353673A (en) | 2015-02-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410611203.4A Pending CN104353673A (en) | 2014-11-04 | 2014-11-04 | Fixed diameter reducing machine for eliminating inner squares of steel pipe |
Country Status (1)
| Country | Link |
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| CN (1) | CN104353673A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110434177A (en) * | 2019-07-17 | 2019-11-12 | 浙江美亚特精密机械有限公司 | A kind of processing technology thickened for hollow pipe tube reducing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110271731A1 (en) * | 2008-12-24 | 2011-11-10 | Sumitomo Metal Industries, Ltd. | Method for producing seamless metallic tube by cold rolling |
| CN202366943U (en) * | 2011-12-14 | 2012-08-08 | 天津君晟成套设备有限公司 | Adjustable three-roller sizing machine frame |
| CN202498078U (en) * | 2012-01-20 | 2012-10-24 | 贵阳捷盛科技实业发展有限公司 | Final rolling device for skew and longitudinal rolling of hollow steel |
| CN103191922A (en) * | 2013-04-03 | 2013-07-10 | 中冶赛迪工程技术股份有限公司 | Four-roll sizing and reducing mill |
| CN103521521A (en) * | 2013-10-17 | 2014-01-22 | 太原科技大学 | Concave roller type pipe skew rolling tension tube reducing technological method |
| CN204353201U (en) * | 2014-11-04 | 2015-05-27 | 辽宁天丰特殊工具制造有限公司 | Eliminate the size-reducing mill of side in steel pipe |
-
2014
- 2014-11-04 CN CN201410611203.4A patent/CN104353673A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110271731A1 (en) * | 2008-12-24 | 2011-11-10 | Sumitomo Metal Industries, Ltd. | Method for producing seamless metallic tube by cold rolling |
| CN202366943U (en) * | 2011-12-14 | 2012-08-08 | 天津君晟成套设备有限公司 | Adjustable three-roller sizing machine frame |
| CN202498078U (en) * | 2012-01-20 | 2012-10-24 | 贵阳捷盛科技实业发展有限公司 | Final rolling device for skew and longitudinal rolling of hollow steel |
| CN103191922A (en) * | 2013-04-03 | 2013-07-10 | 中冶赛迪工程技术股份有限公司 | Four-roll sizing and reducing mill |
| CN103521521A (en) * | 2013-10-17 | 2014-01-22 | 太原科技大学 | Concave roller type pipe skew rolling tension tube reducing technological method |
| CN204353201U (en) * | 2014-11-04 | 2015-05-27 | 辽宁天丰特殊工具制造有限公司 | Eliminate the size-reducing mill of side in steel pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110434177A (en) * | 2019-07-17 | 2019-11-12 | 浙江美亚特精密机械有限公司 | A kind of processing technology thickened for hollow pipe tube reducing |
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| CB02 | Change of applicant information |
Address after: 114011 Liaoning city in Anshan Province Economic Development Zone City Hambourg gas station west red plant hospital Applicant after: Liaoning Tian Feng special tool(s) manufactures limited company Address before: 114011 Liaoning city in Anshan Province Economic Development Zone City Hambourg gas station west red plant hospital Applicant before: LIAONING TIANFENG SPECIAL TOOLS MANUFACTURING CO., LTD. |
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| COR | Change of bibliographic data | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150218 |