CN105728464A - Formation rolling process of hexagonal hollow steel for drill tools - Google Patents
Formation rolling process of hexagonal hollow steel for drill tools Download PDFInfo
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- CN105728464A CN105728464A CN201610215719.6A CN201610215719A CN105728464A CN 105728464 A CN105728464 A CN 105728464A CN 201610215719 A CN201610215719 A CN 201610215719A CN 105728464 A CN105728464 A CN 105728464A
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- roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B13/04—Three-high arrangement
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention relates to a rolling process of hollow steel for drill tools. The rolling process involves rollers and a workpiece to be machined, wherein the rollers are arranged on a machine frame. The three rollers are distributed at the angle of 120 degrees. The rollers are provided with flat roller surfaces. The workpiece is rolled by the rollers multiple times. When the method is used for rolling the hexagonal hollow steel for drill tools, equipment investment is low, production efficiency is high, the hourly output can reach 5 tons, and the yield is as high as 97%. Due to the alternate rolling mode that only three surfaces are rolled each time, the six surfaces and six corners of the workpiece are fully rolled, the outer surface of the product is smooth and has no defect, and the dimensional accuracy is controlled within 0.15 MM and is much higher than the national standard GB/T1301-2008.
Description
Technical field
The present invention relates to a kind of steel rolling production technology, the rolling mill practice of a kind of drilling tool cored steel.
Background technology
Hollow drilling tool steel be used to produce drilling tool: drilling rod.Drilling rod in use should bear high-frequency high-power impact, bears powerful torque again.Under alternate stress effect, drilling rod has the trickleest defect will expand as crackle by Zhejiang and rupture.The forming technology of hexagon cored steel mainly has two kinds at present:
1 、The two reciprocal roll formings of roller strap core.This method equipment investment and production cost are high, and lumber recovery only has 80%.Product endoporus is in serious oval；
2 、Six rollers once roll or draw shapes.Deflection of this method is big, and in deformation process, cored steel there will be and seriously increases wall, forms wrinkle at cored steel inwall.Six corner angle of cored steel can not get roll off, belongs to pile-up and shapes, is easily generated crackle.Lumber recovery only has 90%.
As Chinese Magazines " steel pipe " in December, 2014 the 6th phase of volume 43 discloses the process of hollow hexagonal steel " tube reducing produce " of Wu Jianbing, owing to it is when rolling round hollow steel molding, rolled piece is after frame rolling deformation, exist at rolled piece and roll contact, plastic deformation is maximum, at roll gap, plastic deformation is minimum, the most also has influence on the life-span of drilling rod.
Summary of the invention
The present invention provides that a kind of rolling mill practice is simple, production efficiency is high, lumber recovery is high, the milling method of Life of drill rod length.
The technical scheme is that
A kind of formation rolling method of hexagonal hollow drilling tool steel, including the roll being located in frame with for the workpiece processed, roll is three and is distributed in hexagonal angle, and roll is flat pattern roll surface, and workpiece repeatedly rolls through roll and forms.
Further, the step of said method includes:
1. workpiece entrance first carries out breaking down；
2. workpiece enters second rolling, staggers 60 ° of angles with first breast roller；
3. workpiece enters the 3rd road rolling, and the distribution of roll is identical with first frame, and roll is flat pattern roll surface；
4. workpiece enters the 4th road rolling, and the distribution of roll is identical with second frame；
5. workpiece enters the 5th road rolling, and the distribution of roll is identical with the 3rd frame；
6. workpiece enters the 6th road rolling, and the distribution of roll is identical with the 4th frame.
Further, the sizing reduction after the triangle inscribed circle diameter of three roll surfaces of above-mentioned each roll composition and the deformation of workpiece is suitable.
Further, the last of above-mentioned workpiece also has rolling together, roll surface be one with rounded corners trapezoidal, three roll surfaces one regular hexagons with rounded corners of composition.
Further, above-mentioned workpiece is heated to 950 DEG C ° ~ 1050 DEG C before the rolling.
Adopting rolling hexagonal hollow drilling tool steel in this way, equipment investment is little, and production efficiency is high, and hourly output can reach 5 tons, and lumber recovery is up to 97%.Owing to the most only rolling the alternately rolling mode in three faces, six faces and six angles of workpiece all obtain sufficient roll off, and the outer surface finishing of product is without any defect, and dimension control, within 0.15MM, is significantly larger thanCountryStandard GB/T1301-2008.
The power of each frame uses direct current generator, and the roll rotational speed of each frame is progressively incremented by.So being formed for certain tension force between two frames, workpiece has the stretching of trace during rolling.The stretching of this trace can prevent workpiece from increasing wall, and the inwall of cored steel would not produce wrinkle.
Accompanying drawing explanation
Figure 1Three roll surface roll rolling cross section molding signals of first for the present inventionFigure；
Figure 2Three roll surface roll rolling cross section molding signals of second for the present inventionFigure；
Figure 3Three, the 3rd road roll surface roll rolling cross section molding signal for the present inventionFigure；
Figure 4Three, the 4th road roll surface roll rolling cross section molding signal for the present inventionFigure；
Figure 5Three, the 5th road roll surface roll rolling cross section molding signal for the present inventionFigure；
Figure 6Three, the 6th road roll surface roll rolling cross section molding signal for the present inventionFigure；
Figure 7With rounded corners trapezoidal roll surface roll cross section molding signal for the present inventionFigure；
In figureMark: 1-roll；2-roll mandrel；3-workpiece.
Detailed description of the invention
Below in conjunction withAccompanying drawingIt is described further:
As a example by the specification of the opposite side a size of 35MM of hexagon cored steel；First the round hollow steel material of a diameter of 44MM being heated to 950 DEG C ~ 1050 DEG C, the three roller all-pull mills then feeding 7 frames roll, and the operation of rolling is as follows:
1, workpiece enters first frame, and three rolls in frame are hexagonal angle distribution, and roll is flat pattern roll surface, and the triangle inscribed circle diameter of three roll surface compositions is 41MM, than the round hollow steel little 3MM of material diameter.Workpiece is plane by just becoming three limits after the first frame, three limits be circular arc irregularly shaped (seeFigure 1).
2, workpiece enters second frame, and three rolls in frame are also to be distributed in hexagonal angle, stagger 60 ° of angles with first breast roller, and roll is flat pattern roll surface, and the triangle inscribed circle diameter of three roll surface compositions is about 41MM.Workpiece by just become after the second frame an approximation hexagon (seeFigure 2).
3, workpiece enters the 3rd frame, and the distribution of roll is identical with first frame, and roll is flat pattern roll surface, and the triangle inscribed circle diameter of three roll surface compositions is about 38MM.Workpiece by just become after the 3rd frame an irregular hexagon (seeFigure 3).
4, workpiece enters the 4th frame, and the distribution of roll is identical with second frame, and roll is flat pattern roll surface, and the triangle inscribed circle diameter of three roll surface compositions is about 38MM.Workpiece by just become after the 4th frame a regular hexagon (seeFigure 4).
5, workpiece enters the 5th frame, and the distribution of roll is identical with the 3rd frame, and roll is flat pattern roll surface, and the triangle inscribed circle diameter of three roll surface compositions is about 35MM.Workpiece by just become after the 5th frame a regular hexagon (seeFigure 5).
6, workpiece enters the 6th frame, and the distribution of roll is identical with the 4th frame, and roll is flat pattern roll surface, and the triangle inscribed circle diameter of three roll surface compositions is about 35MM.Workpiece by just become after the 6th frame a regular hexagon (seeFigure 6).
As the another kind of deformation of the present invention, workpiece can also pass through the 7th frame, roll surface be one with rounded corners trapezoidal, three roll surfaces one regular hexagons with rounded corners of composition, hexagon opposite side size is about 35MM.Workpiece by just become after last frame a hexagon cored steel with rounded corners (seeFigure 7).
Above in association withAccompanying drawingDescribe the preferred embodiment of the present invention in detail; but, the present invention is not limited to the detail in above-mentioned embodiment, in the technology concept of the present invention; technical scheme can be carried out multiple simple variant, these simple variant belong to protection scope of the present invention.
Claims (5)
1. the formation rolling method of a hexagonal hollow drilling tool steel, including the roll being located in frame with for the workpiece processed, it is characterised in that described roll is three and is distributed in hexagonal angle, described roll is flat pattern roll surface, and described workpiece repeatedly rolls through described roll and forms.
2. formation rolling method as claimed in claim 1, it is characterised in that the step of described method includes:
1. workpiece entrance first carries out breaking down；
2. workpiece enters second rolling, staggers 60 ° of angles with first breast roller；
3. workpiece enters the 3rd road rolling, and the distribution of roll is identical with first frame, and roll is flat pattern roll surface；
4. workpiece enters the 4th road rolling, and the distribution of roll is identical with second frame；
5. workpiece enters the 5th road rolling, and the distribution of roll is identical with the 3rd frame；
6. workpiece enters the 6th road rolling, and the distribution of roll is identical with the 4th frame.
3. formation rolling method as claimed in claim 1 or 2, it is characterised in that the sizing reduction after the triangle inscribed circle diameter of three roll surface compositions of the most described roll and the deformation of described workpiece is suitable.
4. such as any one formation rolling method in claims 1 to 3, it is characterised in that the last of described workpiece also has rolling together, roll surface be one with rounded corners trapezoidal, three roll surfaces one regular hexagons with rounded corners of composition.
5. such as any one formation rolling method in claims 1 to 3, it is characterised in that described workpiece is heated to 950 DEG C ° ~ 1050 DEG C before the rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610215719.6A CN105728464A (en) | 2016-04-09 | 2016-04-09 | Formation rolling process of hexagonal hollow steel for drill tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610215719.6A CN105728464A (en) | 2016-04-09 | 2016-04-09 | Formation rolling process of hexagonal hollow steel for drill tools |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105728464A true CN105728464A (en) | 2016-07-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610215719.6A Pending CN105728464A (en) | 2016-04-09 | 2016-04-09 | Formation rolling process of hexagonal hollow steel for drill tools |
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| CN (1) | CN105728464A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108160710A (en) * | 2017-03-24 | 2018-06-15 | 浙江久立特材科技股份有限公司 | A kind of seamless pipe manufacturing method of hexagon |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4408476A (en) * | 1978-03-18 | 1983-10-11 | Kocks Technik Gmbh & Co. | Rolling lines |
| CN1911544A (en) * | 2005-08-12 | 2007-02-14 | 科克斯技术有限及两合公司 | Rolling mill frame and rolling equipment for rolling material |
| KR20120037873A (en) * | 2010-10-12 | 2012-04-20 | 주식회사 한영기계 | Manufacturing apparatus for a shaft |
| JP2012240070A (en) * | 2011-05-17 | 2012-12-10 | Kobe Steel Ltd | Method of rolling bar steel |
| CN102974615A (en) * | 2012-11-08 | 2013-03-20 | 聊城市开发区全运钢管制造有限公司 | Rolling process method of punched lining core of steel rod |
| CN103084390A (en) * | 2013-01-18 | 2013-05-08 | 秦建平 | Metal pipe and rod and wire mill |
-
2016
- 2016-04-09 CN CN201610215719.6A patent/CN105728464A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4408476A (en) * | 1978-03-18 | 1983-10-11 | Kocks Technik Gmbh & Co. | Rolling lines |
| CN1911544A (en) * | 2005-08-12 | 2007-02-14 | 科克斯技术有限及两合公司 | Rolling mill frame and rolling equipment for rolling material |
| KR20120037873A (en) * | 2010-10-12 | 2012-04-20 | 주식회사 한영기계 | Manufacturing apparatus for a shaft |
| JP2012240070A (en) * | 2011-05-17 | 2012-12-10 | Kobe Steel Ltd | Method of rolling bar steel |
| CN102974615A (en) * | 2012-11-08 | 2013-03-20 | 聊城市开发区全运钢管制造有限公司 | Rolling process method of punched lining core of steel rod |
| CN103084390A (en) * | 2013-01-18 | 2013-05-08 | 秦建平 | Metal pipe and rod and wire mill |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108160710A (en) * | 2017-03-24 | 2018-06-15 | 浙江久立特材科技股份有限公司 | A kind of seamless pipe manufacturing method of hexagon |
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Application publication date: 20160706 |