CN1905958A - Tube manufacturing method and apparatus for fixed diameter rolling - Google Patents
Tube manufacturing method and apparatus for fixed diameter rolling Download PDFInfo
- Publication number
- CN1905958A CN1905958A CNA2005800015152A CN200580001515A CN1905958A CN 1905958 A CN1905958 A CN 1905958A CN A2005800015152 A CNA2005800015152 A CN A2005800015152A CN 200580001515 A CN200580001515 A CN 200580001515A CN 1905958 A CN1905958 A CN 1905958A
- Authority
- CN
- China
- Prior art keywords
- pipe
- fixed diameter
- rolling
- roll
- diameter rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 77
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000037303 wrinkles Effects 0.000 description 28
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
Abstract
A tube manufacturing method, comprising a step for rolling a tube at a fixed diameter by using an apparatus for fixed diameter rolling formed of a plurality of stands having a plurality of hole type rolling rolls. The method is characterized in that, where the minimum value of angles formed by the tangents drawn on the opposed edge parts of the hole type rolling rolls adjacent to each other in all stands is beta (deg), the outer diameter of the tube on the out-side of the apparatus for fixed diameter rolling is D (mm), and the wall thickness of the tube on the out-side of the apparatus for fixed diameter rolling is t (mm), such a hole type rolling roll that the angle beta can fulfill the requirement of the following expression (1) is used. beta >= 1.13 x 10 x Ln (t/D x 100) + 1.37 x 10<2> ... (1).
Description
Technical field
The present invention relates to a kind of manufacture method and apparatus for fixed diameter rolling of pipe, this apparatus for fixed diameter rolling has a plurality of concave rolls of at least two rollers in each frame, the manufacture method of this pipe can suppress the generation and the expansion of the wrinkle that may take place at the inner surface of pipe effectively when by above-mentioned apparatus for fixed diameter rolling pipe being carried out fixed diameter rolling.
Background technology
Usually be processed in the operation of setting at external diameter, use apparatus for fixed diameter rolling such as sizing mill, stretch-reducing mill pipe.This apparatus for fixed diameter rolling is known to be had to have in each frame and depresses the 3 roll-type apparatus for fixed diameter rolling that the angular separation is 3 concave rolls (following suitably be called " roll ") of 120 °.In addition, it is also known for to have and depress the 4 roll-type apparatus for fixed diameter rolling that the angular separation is 4 concave rolls of 90 ° in each frame.It is also known for the 2 roll-type apparatus for fixed diameter rolling that have two relative concave rolls in each frame.
, recently, the necessity of the environment of preserving our planet improves constantly, and also requires further to realize energy-saving effect for the vehicle body of automobile.For this purpose, the requirement of body lightening improves, and for this reason, is just attempting the driving shaft in the automobile component is changed over hollow unit (pipe) by solid component.
The automobile driving shaft is the important safety assurance parts that the transmission of torque of engine rotation axle arrived tire, need guarantee enough fatigue resistances.Therefore, with effective when making automobile and using driving shaft, need do one's utmost to suppress to make concavo-convex (to call " wrinkle " in the following text) of the accordion-like of the pipe internal surface that the fatigue strength of pipe significantly descends.
And, often take place in these wrinkle operation in the manufacturing process of pipe, that external diameter of pipe is processed as setting.Its reason can be thought not use the instrument that pipe internal surface is retrained owing to apparatus for fixed diameter rolling when pipe is carried out fixed diameter rolling, so, produce wrinkle at pipe internal surface easily.
Summary of the invention
The present invention makes in order to solve such prior art problems, it is based on the newfound opinion of present inventor, promptly, the reduction ratio to whole pipe (external diameter degree of finish) of discovery till from the entrance side of apparatus for fixed diameter rolling with a plurality of frames to outlet side produces very big influence to the generation and the expansion of the wrinkle of the pipe in the fixed diameter rolling operation.
Specifically, as shown in Figure 5,, produce wrinkle and expansion (it is big that the degree of depth of wrinkle becomes) at pipe internal surface along with the increase of apparatus for fixed diameter rolling to the external diameter degree of finish of pipe.The special discovery is that the boundary expands rapidly with the point of external diameter degree of finish 50%.In addition, be Di if set the external diameter of pipe of footpath rolling device entrance side, the external diameter of pipe of apparatus for fixed diameter rolling outlet side (processing diameter) be D, then the external diameter degree of finish value that following formula (2) defines of serving as reasons.
The external diameter degree of finish=(Di-D)/Di * 100 (%) ... (2)
It can also be seen that from Fig. 5, at the external diameter degree of finish more than or equal to about 50% o'clock, in the suitable position of edge part of the pipe of drawing with " ● " (in any frame, be position by the rolling pipe of the edge part of roll, when the apparatus for fixed diameter rolling with 3 roll-types is rolled, circumferentially totally 6 positions along pipe), the wrinkle concentrated area takes place and expansion.
Take place in the wrinkle concentrated area, the suitable position of edge part of this pipe and the reason of expansion can be thought, because the roll Pass profile be an ellipse, so it is more much bigger than the compression stress that other parts put on pipe to put on the compression stress of pipe from the edge part of roll.
According to above opinion,, can consider to limit the upper limit (for example making the external diameter degree of finish) of external diameter degree of finish less than 50% as the method for generation that suppresses wrinkle effectively and expansion.
Yet the method for the upper limit of restriction external diameter degree of finish when making multiple pipe by an apparatus for fixed diameter rolling, need correspondingly be prepared the pipe of multiple external diameter with it.That is the problem that the productivity ratio variation, occurs.
Therefore, wish to find such method, do not limit the upper limit of external diameter degree of finish,, also can suppress the generation and the expansion of wrinkle effectively even promptly the external diameter degree of finish is more than or equal to 50%.
Therefore, inventor of the present invention has further carried out conscientious discussion, found that, the interior surface curvature radius of the suitable position of edge part of pipe, the mean inner radius of pipe (mean value of minor axis and major diameter), and the degree of depth of wrinkle between have certain relation.
More particularly, when using the apparatus for fixed diameter rolling that constitutes by a plurality of frames that pipe is carried out fixed diameter rolling, if be rolled under at the mean value of institute's organic frame more than or equal to 0.55 condition at the ratio of the radius of curvature of the inner surface of the suitable position of edge part of pipe and mean inner radius, even then the external diameter degree of finish is more than or equal to 50%, also can suppress to betide the generation and the expansion of the wrinkle of pipe internal surface effectively, wherein this apparatus for fixed diameter rolling has a plurality of concave rolls in each frame.In addition, " the interior surface curvature radius of the suitable position of edge part of pipe and the mean value of the ratio of mean inner radius at institute's organic frame " be meant, the value after institute's organic frame is with the ratio equalization of the interior surface curvature radius of the suitable position of edge part of the pipe of each frame outlet side and mean inner radius.
Inventor of the present invention is according to above-mentioned opinion, promptly, take place in the wrinkle concentrated area, the suitable position of edge part of pipe and expansion is because the section of pass of concave roll for oval, conscientiously discussed have more approaching just round section of pass and as described above the ratio of interior surface curvature radius and the mean inner radius of the suitable position of edge part of pipe in the mean value of institute's organic frame condition more than or equal to 0.55 concave roll.The result, inventor of the present invention finds, the opposed edges portion cutting-up line of mutually adjacent concave roll in each frame respectively, stipulate correspondingly that with the ratio of external diameter the minimum of a value of angle in institute's organic frame of this tangent line gets final product, and finished the present invention thus with the wall thickness of the pipe of apparatus for fixed diameter rolling outlet side.
That is, the invention provides a kind of manufacture method of pipe, the manufacture method of this pipe comprises apparatus for fixed diameter rolling that use is made of a plurality of frames pipe is carried out the operation of fixed diameter rolling, and each frame of these a plurality of frames has a plurality of concave rolls; Wherein, the opposed edges portion cutting-up line of mutually adjacent concave roll in above-mentioned each frame respectively, when the wall thickness that the external diameter that if the minimum of a value of the angle of this tangent line in institute's organic frame be β (deg), establish the pipe of above-mentioned apparatus for fixed diameter rolling outlet side is D (mm), establish the pipe of above-mentioned apparatus for fixed diameter rolling outlet side is t (mm), use above-mentioned angle beta to satisfy concave roll with following formula (1).
β≥1.13×10×Ln(t/D×100)+1.37×10
2…(1)
According to the present invention, satisfy the concave roll of above-mentioned formula (1) by use angle β, even the external diameter degree of finish of pipe more than or equal to 50%, also makes the compression stress of the suitable position of edge part that puts on pipe relax (dispersion).As a result, the ratio of radius of curvature and mean inner radius of inner surface of the suitable position of edge part that can make pipe more than or equal to 0.55, can suppress to betide the generation and the expansion of wrinkle of the inner surface of pipe at the mean value of institute's organic frame effectively.
In addition, the present invention also provides a kind of apparatus for fixed diameter rolling, and this apparatus for fixed diameter rolling is made of a plurality of frames, and each frame of these a plurality of frames has a plurality of concave rolls; Wherein, the opposed edges portion cutting-up line of mutually adjacent concave roll in above-mentioned each frame respectively, when the wall thickness that the external diameter that if the minimum of a value of the angle of this tangent line in institute's organic frame be β (deg), establish the pipe of above-mentioned apparatus for fixed diameter rolling outlet side is D (mm), establish the pipe of above-mentioned apparatus for fixed diameter rolling outlet side is t (mm), use above-mentioned angle beta to satisfy concave roll with following formula (1).
β≥1.13×10×Ln(t/D×100)+1.37×10
2…(1)
According to the manufacture method and the apparatus for fixed diameter rolling of pipe of the present invention, when pipe being carried out fixed diameter rolling, can suppress to betide the generation and the expansion of the wrinkle of pipe internal surface effectively by apparatus for fixed diameter rolling.
Description of drawings
Fig. 1 is the figure of 3 roll-type apparatus for fixed diameter rolling of manufacture method that the pipe that is suitable for an embodiment of the present invention roughly is shown.
Fig. 2 is the external diameter degree of finish that is illustrated in pipe more than or equal to the ratio of 50% o'clock, the interior surface curvature radius of the suitable position of edge part of pipe and mean inner radius at the mean value of institute's organic frame and the figure of the relation of the degree of depth of the wrinkle that result from pipe internal surface.
Fig. 3 is the key diagram that is used to illustrate the angle of the tangent line that the edge part at concave roll marks.
Fig. 4 be the minimum of a value β of angle beta o shown in Figure 3 in institute's organic frame is shown, at the ratio of the interior surface curvature radius of the suitable position of edge part of the ratio of the wall thickness t of the pipe of apparatus for fixed diameter rolling outlet side and outer diameter D and pipe and mean inner radius figure in the relation of the mean value of institute's organic frame.
Fig. 5 illustrates the external diameter degree of finish of apparatus for fixed diameter rolling and the figure of the relation of the depth capacity of the wrinkle that result from rolling pipe internal surface.
Fig. 6 is the figure of the section of pass of concave roll that present embodiment roughly is shown.
Fig. 7 (a) and (b), (c) are the figure of the section of pass of concave roll that other embodiment of the present invention is shown partly.
The specific embodiment
Below suitably with reference to the description of drawings one embodiment of the present invention.
Fig. 1 is the figure of 3 roll-type apparatus for fixed diameter rolling of manufacture method that the pipe that is suitable for an embodiment of the present invention roughly is shown.As shown in Figure 1, at the apparatus for fixed diameter rolling of present embodiment (in the present embodiment, carry out the rolling stretch-reducing mill of hot size) in 1, at a plurality of (N, in the present embodiment, N=17) being respectively equipped with the angle of depressing direction on frame #1～#N is 3 concave rolls 10 of 120 °, and roll 10 depresses the direction 60 ° of ground alternate configurations that stagger between adjacent frame.In the pass that forms by each roll of each frame, pass pipe P as rolling object, carry out fixed diameter rolling at the outlet side of final frame #N and make its external diameter become predetermined setting.In addition, be the external diameter of Di, outlet side when being D if set the external diameter of the pipe P of footpath rolling device 1 entrance side, then set each frame roll 10 size and the position is set to become external diameter degree of finish by following formula (2) definition.
The external diameter degree of finish=(Di-D)/Di * 100 (%) ... (2)
Fig. 2 is the result's of expression the present inventor investigation curve map, be illustrated in the external diameter degree of finish more than or equal to 50% o'clock, the interior surface curvature radius of the suitable position of edge part of pipe P and the relation of the mean value α of ratio in the organic frame #1～#N of institute of mean inner radius with the degree of depth of the wrinkle that result from pipe P inner surface.More particularly, curve map among Fig. 2 is illustrated on one side the condition of the section of pass of the concave roll 10 of being located at each frame is carried out multiple change, on one side the relation of the mean value α of ratio in the organic frame #1～#N of institute and the degree of depth of the wrinkle that result from pipe P inner surface of the interior surface curvature radius of the suitable position of edge part of pipe P when the carbon steel tubing fixed diameter rolling of external diameter 100mm, wall thickness 11mm become external diameter 40mm, wall thickness 9.6mm and mean inner radius.
Wherein, mean value α obtains like this, promptly, measure the interior surface curvature radius and the mean inner radius of the suitable position of edge part of pipe P at each frame outlet side by using 3 d shape testing device (the accurate society in Tokyo makes), will be average to the ratio between two that each frame outlet side calculates with institute's organic frame number according to this measured value, the value that obtains after average is this mean value α.The serve as reasons value of following step (a)～(c) obtain of mean value α.
(a) at each the frame outlet side interior surface curvature radius of measuring the suitable position of edge part of managing P and mean inner radius, that become the investigation object, end the rolling of pipe P and (take off pipe P from apparatus for fixed diameter rolling 1, or do not carry in the back level frame of this frame not rollingly), the part of this pipe P is cut as sample.
(b) for the sample that cuts out, use the 3 d shape testing device to measure the interior surface curvature radius and the mean inner radius of the suitable position of edge part, calculate ratio between two.
More particularly, at first the inner surface configuration data (constituting the coordinate data of the each several part of inner surface) of the section of the pipe P of the initial use of basis 3 d shape testing device mensuration calculate the position of centre of gravity of managing the P inner surface.Then, use is in the coordinate at inner surface position (promptly being positioned at the inner surface position of pipe P in the centre position, gap of the opposed edges portion that is equivalent to adjacent concave roll) of the pipe P that is equivalent to concave roll flange part position and the center of gravity revolution that goes out around aforementioned calculation from above-mentioned position ± 5 ° the coordinate at each inner surface position of pipe P of position approximately, calculate radius of a circle, with the interior surface curvature radius of this radius that calculates as the suitable position of edge part by these 3 positions.Then, establishing above-mentioned center of gravity is inside radius with the distance that constitutes each position of managing the P inner surface, will be along managing the circumferential inside radius mean value of P as mean inner radius.As described above, calculate the interior surface curvature radius and the mean inner radius of the suitable position of edge part respectively, calculate ratio between two.
(c) outlet side at institute's organic frame carries out above-mentioned (a) and step (b) repeatedly, and measured value (the interior surface curvature radius of the suitable position of edge part and the ratio of the mean inner radius) equalization with institute's organic frame calculates α.
Below with the above step that illustrates of concrete example explanation.For example, data point a shown in Figure 2 (α=0.42, the wrinkle degree of depth=0.135mm), some b (α=0.57, the wrinkle degree of depth=0.05), some c (α=0.92, the α of the wrinkle degree of depth=0.04mm) is such as shown in the following Table 1 respectively, is the value that the interior surface curvature radius r/averaging of mean inner radius d obtains of the suitable position of edge part that will calculate each frame outlet side with institute's organic frame number.
[table 1]
| Point a | Point b | Point c | |||||||
| Frame | Edge part interior surface curvature radius r (mm) | Mean inner radius d (mm) | r/d | Edge part interior surface curvature radius r (mm) | Mean inner radius d (mm) | r/d | Edge part interior surface curvature radius r (mm) | Mean inner radius d (mm) | r/d |
| #1 | 16.9 | 37.5 | 0.45 | 22.6 | 37.6 | 0.60 | 22.6 | 37.6 | 0.60 |
| #2 | 14.3 | 34.8 | 0.41 | 21.6 | 34.9 | 0.62 | 21.6 | 34.9 | 0.62 |
| #3 | 12.8 | 32.0 | 0.40 | 21.0 | 32.4 | 0.65 | 21.0 | 32.4 | 0.65 |
| #4 | 11.9 | 29.7 | 0.40 | 17.7 | 29.6 | 0.60 | 17.7 | 29.6 | 0.60 |
| #5 | 10.7 | 27.5 | 0.39 | 15.3 | 27.4 | 0.56 | 15.3 | 27.4 | 0.56 |
| #6 | 9.4 | 25.3 | 0.37 | 13.7 | 25.3 | 0.54 | 13.7 | 25.3 | 0.54 |
| #7 | 8.5 | 23.1 | 0.37 | 12.3 | 23.3 | 0.53 | 12.3 | 23.3 | 0.53 |
| #8 | 7.5 | 21.5 | 0.35 | 10.8 | 21.3 | 0.51 | 10.8 | 21.3 | 0.51 |
| #9 | 6.9 | 19.8 | 0.35 | 9.7 | 19.4 | 0.50 | 9.7 | 19.4 | 0.50 |
| #10 | 6.1 | 17.9 | 0.34 | 8.5 | 17.8 | 0.48 | 8.5 | 17.8 | 0.48 |
| #11 | 5.3 | 16.1 | 0.33 | 7.9 | 16.4 | 0.48 | 7.9 | 16.4 | 0.48 |
| #12 | 5.0 | 14.8 | 0.34 | 7.2 | 14.8 | 0.49 | 7.2 | 14.8 | 0.49 |
| #13 | 4.9 | 13.5 | 0.36 | 6.6 | 13.3 | 0.50 | 6.6 | 13.3 | 0.50 |
| #14 | 5.8 | 12.1 | 0.48 | 6.7 | 12.1 | 0.55 | 6.7 | 12.1 | 0.55 |
| #15 | 6.4 | 10.9 | 0.59 | 7.2 | 11.0 | 0.65 | 7.2 | 11.0 | 0.65 |
| #16 | 6.3 | 10.5 | 0.60 | 7.0 | 10.7 | 0.65 | 7.0 | 10.7 | 0.65 |
| #17 | 7.2 | 10.5 | 0.69 | 7.3 | 10.4 | 0.70 | 7.3 | 10.4 | 0.70 |
| Mean value α | - | - | 0.42 | - | - | 0.57 | - | - | 0.57 |
In addition, the wrinkle degree of depth shown in Figure 2 is meant the maximum of the wrinkle degree of depth of the pipe P that measures at apparatus for fixed diameter rolling 1 outlet side, for cutting out, section is carried out the value that microscopic observation is measured as sample by the part with the pipe P after rolling.
Can learn that from Fig. 2 α is the boundary with about 0.55, as littler than it, then the degree of depth of wrinkle increases rapidly.Therefore, as on the contrary α being made as more than or equal to 0.55, then can suppress effectively may be in the generation and the expansion of the wrinkle of managing the generation of P inner surface.
Therefore, in the apparatus for fixed diameter rolling 1 of present embodiment, configuration is by the α of the rolling pipe P of apparatus for fixed diameter rolling 1 roll 10 more than or equal to such condition of 0.55.Below, specify the reason of the condition of setting such roll 10 and impose a condition.
At first, as shown in Figure 3, edge part Ea cutting-up line (tangent line of the section of pass near the edge part Ea) La at the roll 10a that each frame has, in the edge part of the roll 10b adjacent with roll 10a, with the edge part Ea opposed edges Eb of portion cutting-up line (tangent line of edge part Eb section of pass nearby) Lb, calculate the angle β o of two tangent line La, Lb.In addition, as shown in Figure 6, it is the circular arc of radius centered R that the section of pass of each roll 10 of present embodiment has with O ', (roll line center) O of this center O ' from the pass center is toward foreign side's (direction of leaving from the bottom land C of roll 10) skew (side-play amount S), and this circular arc be and the direct shape of intersecting of flange side wall surface F of roll 10.And the edge part E of roll 10 (being the end of section of pass PR) is equivalent to the end of the circular arc of above-mentioned radius R.Above-mentioned angle beta o calculates (the angle beta o at 3 positions that each frame is calculated all is identical value) according to this section of pass with method of geometry.
Then, if angle beta o is β (deg) in the minimum of a value of the organic frame #1～#N of institute, at the external diameter (target external diameter) of the pipe P of apparatus for fixed diameter rolling 1 outlet side for D (mm), at the wall thickness (target wall thickness) of the pipe P of apparatus for fixed diameter rolling 1 outlet side during for t (mm), according to inventor's of the present invention investigation as can be known, β, t/D, and α be as shown in Figure 4 relation.At this, the transverse axis of Fig. 4 is represented t/D (%), the longitudinal axis is represented β (deg), the α of the pipe P that the data representation of drawing with " zero " is rolling is 0.55 data, the α of the pipe P that the data representation of drawing with " ● " is rolling is than 0.55 big data, and the α of the pipe P that the data representation of drawing with " * " is rolling is less than 0.55 data.
Be described more specifically, for example, the data point A shown in Figure 4 (data that t/D=24.0%, β=173deg) obtain when according to condition shown in the following table 2 the carbon steel tubing fixed diameter rolling of external diameter 100mm, wall thickness 11mm being become external diameter 40mm, wall thickness 9.6mm.That is, under condition shown in the table 2, angle beta o is 173deg at the minimum of a value β of the organic frame #1～#17 of institute, at the t/D=24.0% of apparatus for fixed diameter rolling 1 outlet side (being #17 frame outlet side), so be depicted as coordinate shown in Figure 4.
[table 2]
| Frame | Outlet side outer diameter D (mm) | Outlet side wall thickness t (mm) | βo(deg) | External diameter degree of finish (%) in single frame | t/D(％) |
| #1 | 97.0 | 10.9 | 173 | 3 | 11.2 |
| #2 | 91.2 | 10.8 | 173 | 6 | 11.8 |
| #3 | 85.7 | 10.7 | 173 | 6 | 12.5 |
| #4 | 80.6 | 10.6 | 173 | 6 | 13.2 |
| #5 | 75.7 | 10.5 | 173 | 6 | 13.9 |
| #6 | 71.2 | 10.4 | 173 | 6 | 14.6 |
| #7 | 66.9 | 10.3 | 173 | 6 | 15.4 |
| #8 | 62.9 | 10.2 | 173 | 6 | 16.2 |
| #9 | 59.1 | 10.1 | 173 | 6 | 17.1 |
| #10 | 55.6 | 10.0 | 173 | 6 | 18.0 |
| #11 | 52.2 | 9.9 | 173 | 6 | 18.9 |
| #12 | 49.1 | 9.8 | 173 | 6 | 20.0 |
| #13 | 46.2 | 9.7 | 173 | 6 | 21.0 |
| #14 | 43.4 | 9.6 | 173 | 6 | 22.1 |
| #15 | 41.2 | 9.6 | 178 | 5 | 23.3 |
| #16 | 40.4 | 9.6 | 178 | 2 | 23.8 |
| #17 | 40.0 | 9.6 | 180 | 1 | 24.0 |
Can learn from Fig. 4, make α, as long as β is set at more than or equal to setting with respect to each t/D more than or equal to 0.55.Therefore, in the present embodiment, be after the approximate α of function (natural logrithm function) of variable is 0.55 o'clock the value of β about each t/D, in order to t/D, set the section of pass of roll 10, so that β becomes the value more than or equal to this approximate function.More particularly, for making angle beta satisfy the section of pass that following formula (1) is set roll 10.
β≥1.13×10×Ln(t/D×100)+1.37×10
2…(1)
If use the roll 10 be set as described above to be rolled, then as described above, the α that can make pipe P is more than or equal to 0.55, so, can suppress to betide the generation and the expansion of the wrinkle of pipe P inner surface effectively.
In addition, with reference to Fig. 6 as mentioned above, the section of pass PR of each roll 10 of present embodiment has the single circular arc of radius R, and the edge part E of roll 10 (being the end of section of pass PR) is equivalent to the end of the circular arc of above-mentioned radius R.But the section of pass of each roll 10 of the present invention is not limited thereto, and also can adopt the roll with various section of pass as shown in Figure 7.Fig. 7 illustrates itself and the figure at the regional corresponding position that is surrounded by dotted line of Fig. 6 for the section of pass to the concave roll of other embodiment of the present invention.Shown in Fig. 7 (a), section of pass PR as each roll 10 of the present invention, also can use the shape that is constituted, directly intersected with flange side wall surface F by the different a plurality of circular arcs of radius, the edge part E of roll 10 in this case is equivalent to be positioned at the end of the circular arc (radius R n) of flange side.In addition, also can adopt between the flange side wall surface F of section of pass PR that constitutes by single circular arc or a plurality of circular arc and roll 10 shape (Fig. 7 (b)) that the what is called " yielding portion (escape) " that is made of the circular arc (radius r) of side's (towards the pass center) convex inwardly is set, or be provided with the shape (Fig. 7 (c)) of " the yielding portion " that constitute by straight line.The edge part E of the roll 10 under these situations is equivalent to constitute the end (being positioned at the end of the circular arc of flange side) of the circular arc of section of pass PR.
In addition, in the present embodiment, be that example is illustrated with 3 roll-type apparatus for fixed diameter rolling, but the invention is not restricted to this that what also can similarly be applicable to forms such as 4 roll-types or 2 roll-types has the apparatus for fixed diameter rolling of a plurality of concave rolls in each frame.
Claims (2)
1. the manufacture method of a pipe comprises apparatus for fixed diameter rolling that use is made of a plurality of frames pipe is carried out the operation of fixed diameter rolling, and each frame of these a plurality of frames has a plurality of concave rolls; It is characterized in that,
The opposed edges portion cutting-up line of mutually adjacent concave roll in above-mentioned each frame respectively, if the minimum of a value of the angle of this tangent line in institute's organic frame is the external diameter of the pipe of β (deg), above-mentioned apparatus for fixed diameter rolling outlet side is that the wall thickness of the pipe of D (mm), above-mentioned apparatus for fixed diameter rolling outlet side is when being t (mm), use the satisfied concave roll of above-mentioned angle beta with following formula (1)
β≥1.13×10×Ln(t/D×100)+1.37×10
2...(1)。
2. an apparatus for fixed diameter rolling is made of a plurality of frames, and each frame of these a plurality of frames has a plurality of concave rolls; It is characterized in that,
The opposed edges portion cutting-up line of mutually adjacent concave roll in above-mentioned each frame respectively, if the minimum of a value of the angle of this tangent line in institute's organic frame is the external diameter of the pipe of β (deg), above-mentioned apparatus for fixed diameter rolling outlet side is that the wall thickness of the pipe of D (mm), above-mentioned apparatus for fixed diameter rolling outlet side is when being t (mm), above-mentioned angle beta satisfies with following formula (1)
β≥1.13×10×Ln(t/D×100)+1.37×10
2...(1)。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004096821 | 2004-03-29 | ||
| JP096821/2004 | 2004-03-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1905958A true CN1905958A (en) | 2007-01-31 |
| CN100409953C CN100409953C (en) | 2008-08-13 |
Family
ID=35056038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005800015152A Expired - Fee Related CN100409953C (en) | 2004-03-29 | 2005-03-23 | Tube manufacturing method and apparatus for fixed diameter rolling |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1731234B1 (en) |
| JP (1) | JP4650747B2 (en) |
| CN (1) | CN100409953C (en) |
| WO (1) | WO2005092531A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652197B (en) * | 2007-03-30 | 2012-01-04 | 住友金属工业株式会社 | Method for manufacturing cold-finished seamless steel pipe for integrally molded drive shaft |
| CN103459056A (en) * | 2011-03-31 | 2013-12-18 | 新日铁住金株式会社 | Method for manufacturing roll for reducing, and roll for reducing |
| CN113543901A (en) * | 2019-03-15 | 2021-10-22 | 杰富意钢铁株式会社 | Method for manufacturing seamless square steel pipe |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080100842A (en) | 2006-03-29 | 2008-11-19 | 수미도모 메탈 인더스트리즈, 리미티드 | Cold finish seamless steel pipe for drive shaft and method for producing the same |
| CN101823075B (en) * | 2010-05-25 | 2013-04-24 | 攀钢集团有限公司 | Rolling method for sharpening head and tail wall thickness of seamless steel tube |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5728604A (en) * | 1980-07-25 | 1982-02-16 | Sumitomo Metal Ind Ltd | Caliber roll |
| JPS61216805A (en) * | 1985-03-22 | 1986-09-26 | Nippon Kokan Kk <Nkk> | Multi-stand continuous drawing and rolling method for metallic pipe |
| DE69620310T2 (en) * | 1995-01-10 | 2002-11-21 | Sumitomo Metal Ind | METHOD AND DEVICE FOR PUNCHING SEAMLESS TUBES |
| DE19506858C1 (en) * | 1995-02-14 | 1996-01-18 | Mannesmann Ag | Roll pass design for 3-roll passes of mandrel-less tube reducing mills |
| CN1141191C (en) * | 1995-05-10 | 2004-03-10 | 住友金属工业株式会社 | Method for boring/rolling seamless steel pipe and apparatus thereof |
| DE19539408C2 (en) * | 1995-10-11 | 2003-03-20 | Sms Demag Ag | Caliber contour of the roll of a tube rolling mill |
| JP3070496B2 (en) * | 1996-11-26 | 2000-07-31 | 住友金属工業株式会社 | Rolling roll and rolling method for pipe material |
| DE10201717C1 (en) * | 2002-01-18 | 2003-04-10 | Sms Meer Gmbh | Pipe rolling stand in which at least two rollers work together, takes the measured pipe wall thickness at different peripheral positions to control the roller rotary speeds independently |
-
2005
- 2005-03-23 WO PCT/JP2005/005198 patent/WO2005092531A1/en not_active Application Discontinuation
- 2005-03-23 EP EP05721298A patent/EP1731234B1/en not_active Expired - Fee Related
- 2005-03-23 CN CNB2005800015152A patent/CN100409953C/en not_active Expired - Fee Related
- 2005-03-23 JP JP2006511469A patent/JP4650747B2/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652197B (en) * | 2007-03-30 | 2012-01-04 | 住友金属工业株式会社 | Method for manufacturing cold-finished seamless steel pipe for integrally molded drive shaft |
| CN103459056A (en) * | 2011-03-31 | 2013-12-18 | 新日铁住金株式会社 | Method for manufacturing roll for reducing, and roll for reducing |
| CN103459056B (en) * | 2011-03-31 | 2015-03-04 | 新日铁住金株式会社 | Method for manufacturing roll for reducing rolling, and roll for reducing rolling |
| CN113543901A (en) * | 2019-03-15 | 2021-10-22 | 杰富意钢铁株式会社 | Method for manufacturing seamless square steel pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1731234B1 (en) | 2011-08-03 |
| JP4650747B2 (en) | 2011-03-16 |
| EP1731234A4 (en) | 2007-10-24 |
| WO2005092531A1 (en) | 2005-10-06 |
| JPWO2005092531A1 (en) | 2008-02-07 |
| EP1731234A1 (en) | 2006-12-13 |
| CN100409953C (en) | 2008-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1905958A (en) | Tube manufacturing method and apparatus for fixed diameter rolling | |
| CN1297415C (en) | Pneumatic tire | |
| US8459876B2 (en) | Rolling bearing and method for the production thereof | |
| CN1909992A (en) | Die, method of manufacturing stepped metal tube, and stepped metal tube | |
| CN1626367A (en) | Pneumatic tire | |
| CN111420992B (en) | Sizing rolling forming method for axial inner rib cylindrical part | |
| CN103861987B (en) | Hollow shaft is swaged the method for designing of mould | |
| CN1418781A (en) | Inflated radial tire | |
| CN1290633C (en) | Method of manufacturing seamless steel pipe | |
| CN1744955A (en) | Seamless steel tube for drive shaft and method for manufacturing the same | |
| EP2490904B1 (en) | Tire with asymmetric groove bottom for shoulder groove | |
| CN108116166B (en) | Pneumatic tire | |
| JP6454181B2 (en) | Heavy duty pneumatic tire and manufacturing method thereof | |
| EP2660077B1 (en) | Pneumatic tire | |
| CN1909985A (en) | Tube reducing apparatus and roll for tube reducing apparatus | |
| CN1911692A (en) | Pneumatic tyre, manufacturing method thereof and tyre vulcanization mold used thereby | |
| CN1311835A (en) | Single wire steel cord and method of producing same | |
| CN1863608A (en) | Method of manufacturing seamless tube by three-roll mandrel mill | |
| EP1894749A1 (en) | Pneumatic tire | |
| CN108290457A (en) | It include the tire of the pattern block with sloped sidewall | |
| CN1887472A (en) | Method of determing cold rolling expansion feeding speed | |
| JP2014233911A (en) | Rubber member for tire and method for manufacturing the same and method for manufacturing tire | |
| CN100446967C (en) | Method and device for manufacturing support body for run flat | |
| CN104455326B (en) | Thickening crankshaft vibration damper multi-wedge-pulley outer wheel and manufacturing method thereof | |
| CN106862868A (en) | A kind of automobile bushing production technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NIPPON STEEL + SUMITOMO METAL CORPORATION Free format text: FORMER OWNER: CHUGAI SEIYAKU KABUSHIKI KAISHA Effective date: 20130426 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130426 Address after: Tokyo, Japan, Japan Patentee after: Nippon Steel Corporation Address before: Osaka Japan Patentee before: Sumitomo Metal Industries Ltd. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Tokyo, Japan, Japan Patentee after: Nippon Iron & Steel Corporation Address before: Tokyo, Japan, Japan Patentee before: Nippon Steel Corporation |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080813 Termination date: 20210323 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |