CN103249501A - Method for molding short-side end of unequal angle steel and device therefor - Google Patents
Method for molding short-side end of unequal angle steel and device therefor Download PDFInfo
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- CN103249501A CN103249501A CN2012800040578A CN201280004057A CN103249501A CN 103249501 A CN103249501 A CN 103249501A CN 2012800040578 A CN2012800040578 A CN 2012800040578A CN 201280004057 A CN201280004057 A CN 201280004057A CN 103249501 A CN103249501 A CN 103249501A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/09—L-sections
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Abstract
A short-side end molding device has a molding roller (20) that, in a hot rolling step for an unequal angle steel, presses and molds an end part (201b) of the short side (201) of an unequal angle steel (200) that has undergone an intermediate rolling step or a finishing rolling step using a molding part (22), as the end part (201b) is caused to pass over the molding part (22), which is formed in an outer peripheral surface (21), in the circumferential direction of the molding part. The molding part (22) is formed in a recessed shape over the entire circumference of the outer peripheral surface (21) of the molding roller (20). The shape of the molding roller (20) along the axial direction is an arc shape and a linear shape adjacent to the arc shaped portion (22a), and the linear shaped portion (22b) matches the tangent (t) of the adjacent end part (22c) of the arc shaped portion (22a).
Description
Technical field
The present invention relates to the forming technique of the minor face end of the frequent unequal angles such as angle of unequal legs ﹠ thickness that use in shipbuilding.
Background technology
All the time, the angle of unequal legs ﹠ thickness that often uses in shipbuilding is made by hot rolling.Particularly, in hot-rolled process, in heating process, the steel billet as blank is heated, then, in the roughing operation reaches, roll in the operation and carry out the multi-pass roll forming by each rolling mill, thereby form the cross sectional shape near dihedral.Then, in the finish rolling operation, carry out a time roll forming, thereby be processed into the cross sectional shape of regulation.
Fig. 9 is the stereogram of the shape of expression angle of unequal legs ﹠ thickness 200.
As shown in Figure 9, angle of unequal legs ﹠ thickness 200 is made of minor face (edge of a wing) 201 and long limit (web) 202, and the cross section is roughly L font.At this, minor face is thicker than long limit.
Such angle of unequal legs ﹠ thickness 200 is being implemented under the situation of applications, also needed the end face 201b1 of the end 201b of minor face 201 is suitably carried out application.
At this, Figure 10 A and Figure 10 B show the shape of the end of minor face.
Shown in Figure 10 A (position that circle encloses), on minor face 201, be formed with seamed edge if end face 201b1 and lateral surface 201a are discontinuous, then when application, produce the application inequality easily.In addition, as shown in Figure 9, lateral surface 201a, the 202a on minor face 201 and long limit 202 be via the outside portion 203a of bend 203 on minor face 201 and long limit 202 side of adjacency.
In order not produce such application inequality, shown in Figure 10 B (position that circle encloses), require on minor face 201, to make end face 201b1 and lateral surface 201a link to each other to suppress the shaping (preferably not producing seamed edge) of seamed edge sleekly.
Therefore, for the angle steel goods, the end shape of strict management minor face.Especially, will send into the finishing line to the strict product of the seamed edge tolerance of minor face end, in cold working, become below the tolerance in order to make seamed edge, by equipment such as grinding machine end trimming to minor face in length range.
At this, as patent documentation 1 disclosed enation thing manufacturing process, exist in the method that removes the enation thing in the cold working operation by grinding.
The prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2008-290185 communique
Summary of the invention
But, in patent documentation 1 disclosed method, in order to remove seamed edge, need have bistrique and for detection of the large-scale plant of the controller of end position.
The objective of the invention is to, with simple structure the seamed edge of the end face of minor face is shaped sleekly.
In order to solve above-mentioned technical task, technical scheme 1 of the present invention is a kind of manufacturing process of minor face end of unequal angle, in the hot-rolled process of unequal angle, make through in roll the above-mentioned unequal angle of operation or finish rolling operation the end of minor face, circumferentially on forming section, being shaped by being pressed by this forming section on one side of one edge forming rolls, wherein, above-mentioned forming section is formed on the outer peripheral face of forming rolls, above-mentioned forming section forms in the complete cycle scope of the outer peripheral face of above-mentioned forming rolls and is concavity, and the axial shape along above-mentioned forming rolls of above-mentioned forming section be circular shape and with the rectilinear form of the position adjacency of this circular shape, the tangent line of the end of the above-mentioned adjacency in the position of above-mentioned rectilinear form and the position of above-mentioned circular shape is consistent.
In addition, technical scheme 2 of the present invention is characterised in that, in the manufacturing process of the minor face end of the unequal angle that technical scheme 1 is put down in writing, in the end on the long limit of the above-mentioned unequal angle of constraint and carry out the shaping of end of above-mentioned minor face by above-mentioned forming rolls before, carry out rolling the above-mentioned unequal angle of operation or finish rolling operation to the guiding of above-mentioned forming rolls to having passed through in above-mentioned.
In addition, technical scheme 3 of the present invention is a kind of building mortion of minor face end of unequal angle, has forming rolls, outer peripheral face at this forming rolls is formed with forming section, in the hot-rolled process of unequal angle, make by in roll the minor face of the above-mentioned unequal angle that operation or finish rolling operation obtain the end, circumferentially on forming section, being shaped by being pressed by this forming section on one side of one edge forming rolls, above-mentioned forming section forms in the complete cycle scope of the outer peripheral face of above-mentioned forming rolls and is concavity, and the axial shape along above-mentioned forming rolls of above-mentioned forming section be circular shape and with the rectilinear form of the position adjacency of this circular shape, the tangent line of the end of the above-mentioned adjacency in the position of above-mentioned rectilinear form and the position of above-mentioned circular shape is consistent.
In addition, technical scheme 4 of the present invention is characterised in that, in the building mortion of the minor face end of the unequal angle that technical scheme 3 is put down in writing, also has guide portion, guide sections is in the transport path that has passed through the above-mentioned unequal angle that rolls operation or finish rolling operation in above-mentioned, be configured in upstream side with respect to above-mentioned forming rolls, retrain above-mentioned unequal angle long limit the end and carry out the guiding of above-mentioned unequal angle to above-mentioned forming rolls.
The invention effect
According to the present invention, because forming rolls has forming section, this forming section forms in the complete cycle scope of the outer peripheral face of forming rolls and is concavity, and the axial shape along forming rolls of forming section be circular shape and with the rectilinear form of the position adjacency of this circular shape, the tangent line of the end of the adjacency in the position of rectilinear form and the position of circular shape is consistent, therefore, in hot-rolled process, only the end that presses on minor face by the forming rolls that will have forming section makes the end formed of minor face, just can the seamed edge of the end face of minor face is shaped sleekly with simple structure.
Description of drawings
Fig. 1 is the vertical view of structure of the minor face end building mortion of expression present embodiment.
Fig. 2 is the front view of the shape of expression forming rolls.
Fig. 3 is the front view of the shape of expression deflector roll.
Fig. 4 is the figure of an example of the hot-rolled process that undertaken by the equipment of hot rolling that is provided with minor face end building mortion of expression.
Fig. 5 A is illustrated in the forming process of the minor face end of being undertaken by minor face end building mortion, comes the state diagram of the end on constraint length limit by deflector roll.
Fig. 5 B is expression retrains the end of minor face by forming rolls from the state shown in Fig. 5 A state diagram.
Fig. 6 is that the end of minor face is being formed roller constraint and during by forming rolls, becomes the key diagram of the shape that arc sections and planar portions with forming section match.
Fig. 7 only represents that arc sections by forming rolls makes the figure of the comparative example under the end formed situation of minor face.
Fig. 8 is the figure of the comparative example under position, top and the situation that the lateral surface of minor face contacts of expression forming rolls.
Fig. 9 is the stereogram of the shape of expression angle of unequal legs ﹠ thickness.
Figure 10 A shows the end shape of minor face, is that expression end face and lateral surface are discontinuous and be formed with the state diagram of seamed edge.
Figure 10 B shows the end shape of minor face, is the state diagram of representing that end face and lateral surface link to each other sleekly.
The specific embodiment
(structure)
Present embodiment is the end formed device (below, only be called minor face end building mortion) of the minor face of angle of unequal legs ﹠ thickness.
Fig. 1 is the vertical view that is illustrated in the structure of the minor face end building mortion 10 that the back level for the finish rolling device 100 of implementing the finish rolling operation arranges.
As shown in Figure 1, minor face end building mortion 10 has: minor face outlet side guide portion 11, long limit outlet side guide portion 12, forming rolls (seamed edge forming rolls, forming rolls) 20 and deflector roll 30.
Minor face outlet side guide portion 11 and long limit outlet side guide portion 12 dispose in the outlet side mode respect to one another in finish rolling operation (finish rolling device 100), respectively to minor face and the long limit channeling conduct of the angle of unequal legs ﹠ thickness that transports from the finish rolling operation.
Forming rolls 20 is end formed for the minor face that makes angle of unequal legs ﹠ thickness.Forming rolls 20 rotations are assembled on the minor face outlet side guide portion 11 freely.At this, forming rolls 20 is arranged to make rotating shaft vertical.
Fig. 2 is the front view of the shape of expression forming rolls 20.
As shown in Figure 2, forming rolls 20 with outer circumference diameter along with trending towards from the upper end near the bottom and the mode undergauge that reduces gradually (receiving thin).In this forming rolls 20, the bottom at the undergauge position of outer peripheral face 21 is the forming section 22 for the end face forming that makes minor face.And the bottom 24 of forming rolls 20 is roughly disc-shape with respect to bottom (forming section 22) hole enlargement at undergauge position.Thickness increases gradually along with trending towards rotating shaft O in this bottom 24, and its upper surface 24a tilts.
In order to make the end formed of minor face, forming section 22 has the orthodrome shape.Particularly, forming section 22 forms in the complete cycle scope of the outer peripheral face 21 of forming rolls 20 and is concavity, the axial shape along forming rolls 20 of forming section 22 (along the shape of the above-below direction of outer peripheral face 21) be circular shape and with the rectilinear form of the position of this circular shape (below, be called arc sections) 22a adjacency.And 22b is consistent with the tangent line t of the end 22c of adjacency on arc sections 22a at the position of rectilinear form (below, be called planar portions).
At this, arc sections 22a has predetermined radius, so that the end face of the minor face that will be shaped (201b1) becomes desired shape.In addition, planar portions 22b has predetermined gradient (angle), thus with the constraint posture of angle of unequal legs ﹠ thickness described later in minor face (the lateral surface 201a of minor face) the angle of inclination about equally.In addition, in the present embodiment, near position (lower portion) 22b1 of end 22c planar portions 22b, arc sections 22a is the actual end formed position that helps minor face, other positions of planar portions 22b (position, top) 22b2 is actual to be helpless to the end formed of minor face, is the position that arranges in order to have surplus.
In addition, in the undergauge position of forming rolls 20 is to have predetermined gradient (angle) and the portion that dodges 23 of formation with positions, top forming section 22 adjacency (with the position, top of planar portions 22b adjacency).Here said predetermined gradient refers to, for the portion of dodging 23 is contacted when minor face end formed with the lateral surface of this minor face and have the gradient of dodging the angle.
As mentioned above, the outer peripheral face of forming rolls 20 be formed with arc sections 22a, planar portions 22b and dodge portion 23 such, three different reducing diameter parts (receiving thin portion) roughly.
On the other hand, deflector roll 30 when forming rolls 20 makes minor face end formed to the angle of unequal legs ﹠ thickness channeling conduct.Deflector roll 30 is assembled on the long limit outlet side guide portion 12 in the mode that is positioned at the throughput direction upstream side with respect to forming rolls 20.At this moment, deflector roll 30 rotations are assembled on the long limit outlet side guide portion 12 freely.At this, deflector roll 30 is arranged to make rotating shaft vertical.
Like this, by at long limit outlet side guide portion 12 assembling deflector rolls 30, can make this deflector roll 30 and forming rolls 20 only be spaced from each other predetermined distance ground according to the shape of angle of unequal legs ﹠ thickness and arrange.
Fig. 3 is the front view of the shape of expression deflector roll 30.
As shown in Figure 3, deflector roll 30 along with trending towards central portion and the mode undergauge that reduces gradually from upper and lower side respectively, is the shape of drum type roughly or hourglass shape with outer circumference diameter.Deflector roll 30 retrains the end on the long limit of (supporting) angle of unequal legs ﹠ thickness by the outer peripheral face 31a at the position that is the substantial cylindrical shape 31 of downside, thereby to the angle of unequal legs ﹠ thickness channeling conduct.
(effect, effect etc.)
Fig. 4 shows an example of the hot-rolled process that is undertaken by the equipment of hot rolling that is provided with minor face end building mortion 10.
As shown in Figure 4, hot-rolled process has: heating process (step S1), roughing operation (step S2), in roll operation (step S3) and finish rolling operation (step S4).And, in the present embodiment, in hot-rolled process, implement end formed (the step S5) of minor face in finish rolling operation (step S4) back.
In hot-rolled process, in heating process (step S1), the steel billet as blank is heated, then, in roughing operation (step S2) reaches, roll in the operation (step S3) and carry out the multi-pass roll forming by each rolling mill, thereby form the cross sectional shape near dihedral.Then, in finish rolling operation (step S4, finish rolling device 100 shown in Figure 1), carry out a time roll forming, thereby be processed into the cross sectional shape of regulation.For example, in each roll forming, mainly use concave roll.And, after finish rolling operation (step S4), make end formed (the step S5) of minor face by minor face end building mortion 10.
Fig. 5 A and Fig. 5 B show the forming process (step S5) of the minor face end of being undertaken by minor face end building mortion 10.
Shown in Fig. 5 A, at first, the end face 202b (especially end face 202b1) on the long limit 202 of deflector roll 30 constraint angle of unequal legs ﹠ thickness 200.Thus, combine to retrain the long limit 202 of angle of unequal legs ﹠ thickness 200 with the guiding of being undertaken by minor face outlet side guide portion 11 and long limit outlet side guide portion 12.Its result is to have determined the roll line (pass line) of minor face 201.That is to say, by making the end 202b on deflector roll 30 constraint length limits 202, can determine the roll line of the end 201b of minor face 201.
Then, shown in Fig. 5 B, the end 201b of the minor face 201 of the angle of unequal legs ﹠ thickness of carrying along roll line 200 is positioned at forming rolls 20 constraints of conveyance direction downstream side with respect to deflector roll 30.That is, the end 202b on the long limit 202 of angle of unequal legs ﹠ thickness is retrained by deflector roll 30, and the end 201b of the minor face 201 of angle of unequal legs ﹠ thickness roller 20 constraint that is formed.
And, in be formed roller 20 constraint and during by forming rolls 20 of the end of minor face 201 201b, as shown in Figure 6, the end 201b of minor face 201 since the forming section 22 that is constituted by arc sections 22a and planar portions 22b of the roller 20 that is formed press, so become the shape that matches with arc sections 22a and planar portions 22b (particularly being the lower portion 22b1 of planar portions 22b).That is, the end face 201b1 of minor face 201 forms cambered surface in length range, and tangent line and this lateral surface 201a with end lateral surface 201a adjacency in this cambered surface is consistent.That is to say that the end face 201b1 of minor face 201 can not produce seamed edge and become slick and sly shape in length range.
In addition, as mentioned above, in the present embodiment, with respect to forming rolls 20 deflector roll 30 is configured in the transport path upstream side.That is, carry out minor face end formed by forming rolls 20 before, carry out the guiding to forming rolls 20 of the angle of unequal legs ﹠ thickness 200 that passed through the finish rolling operation.
For example, if with respect to forming rolls 20 deflector roll 30 is configured in the transport path downstream, then the roll line of angle of unequal legs ﹠ thickness becomes unstable, in the forming process of end, the end of minor face stably is shaped.Thus, in the present embodiment, by with respect to forming rolls 20 deflector roll 30 being configured in the transport path upstream side, realized the stable shaping of minor face end.
In addition, as mentioned above, in forming rolls 20, dodge the lateral surface that portion 23 forms with respect to minor face and have the angle of dodging.Therefore, can prevent decline owing to the forming accuracy that contacts the minor face end that causes of the lateral surface of the position, top of forming rolls 20 and minor face.
In addition, the present inventor finds that the seamed edge of the end of minor face produces in hot-rolled process, by as present embodiment, in hot-rolled process, adding the forming process of minor face end, namely, encircle as one of hot-rolled process, after being shaped in finish rolling, and then make the end formed of minor face, can prevent the generation of seamed edge efficiently.
In addition, because the rolling stock temperature of the angle of unequal legs ﹠ thickness after the finish rolling is about 700 ℃～800 ℃, therefore, the degree that contacts with the minor face end face with forming rolls 20 just can form very slick and sly end surface shape.
Fig. 7 and Fig. 8 show the comparative example (not having the example of said structure as the present embodiment) with respect to present embodiment.
Fig. 7 is for only making the situation of the end 201b shaping of minor face 201 by the arc sections 22a of forming rolls 20.Under this situation, produce such seamed edge shown in Figure 10 A at the end of minor face 201 201b.
Fig. 8 is the situation that the position, top 25 of forming rolls 20 contacts with the lateral surface 201a of minor face 201.Under this situation, even make not being shaped as of forming section 22 of forming rolls 20 can produce the such shape of seamed edge in the end, also can can't obtain desired end surface shape owing to such contact.
In addition, in the present embodiment, for example, deflector roll 30 has been realized guide portion.
(modified embodiment of the present embodiment)
Present embodiment is not limited to angle of unequal legs ﹠ thickness, the unequal angle that the thickness that also can be applicable to minor face equates with the thickness on long limit.
In addition, in the present embodiment, minor face end building mortion is arranged on the back level of finish rolling device, but in the situation that is difficult to realize this set etc. down, roll the outlet side of the pass of operation in also can being arranged on, under these circumstances, also can access the effect identical with the situation of the back level that is arranged on the finish rolling device.
In addition, generally, angle steel is that hot rolling is carried out in the top with the lateral surface (201a, 202a) on minor face and long limit, therefore, in above example, though with minor face end building mortion 10 be arranged to shown in Figure 1 towards, can be freely according to the angle steel that is rolled towards to the setting of minor face end building mortion 10 towards suitably adjusting.
Embodiment
Use long limit in the cross sectional shape to be of a size of that 350mm, minor face are of a size of the angle of unequal legs ﹠ thickness of 100mm and the manufacturing process by present embodiment makes minor face end formed.
Its result is, when making the strict angle of unequal legs ﹠ thickness goods of the tolerance of seamed edge, need not to send into the finishing line, just can to make seamed edge be below the tolerance in length range.
Description of reference numerals
10 minor face end building mortions
11 minor face outlet side guide portion
12 long limit outlet side guide portion
20 forming rolls
21 outer peripheral faces
22 forming sections
The 22a arc sections
The 22b planar portions
30 deflector rolls
Claims (4)
1. the manufacturing process of the minor face end of a unequal angle is characterized in that,
In the hot-rolled process of unequal angle, make through in roll the described unequal angle of operation or finish rolling operation the end of minor face, circumferentially on described forming section, being shaped by being pressed by this forming section on one side of an edge forming rolls, wherein, described forming section is formed at the outer peripheral face of forming rolls
Described forming section forms in the complete cycle scope of the outer peripheral face of described forming rolls and is concavity, and the axial shape along described forming rolls of described forming section be circular shape and with the rectilinear form of the position adjacency of this circular shape,
The tangent line of the end of the described adjacency in the position of described rectilinear form and the position of described circular shape is consistent.
2. the manufacturing process of the minor face end of unequal angle as claimed in claim 1 is characterized in that,
In the end on the long limit of the described unequal angle of constraint and carry out the shaping of end of described minor face by described forming rolls before, carry out rolling the described unequal angle of operation or finish rolling operation to the guiding of described forming rolls to having passed through in described.
3. the building mortion of the minor face end of a unequal angle is characterized in that,
Has forming rolls, outer peripheral face at described forming rolls is formed with forming section, in the hot-rolled process of unequal angle, make by in roll the minor face of the described unequal angle that operation or finish rolling operation obtain the end, circumferentially on described forming section, being shaped by being pressed by this forming section on one side of the described forming rolls in one edge
Described forming section forms in the complete cycle scope of the outer peripheral face of described forming rolls and is concavity, and the axial shape along described forming rolls of described forming section be circular shape and with the rectilinear form of the position adjacency of this circular shape,
The tangent line of the end of the described adjacency in the position of described rectilinear form and the position of described circular shape is consistent.
4. the building mortion of the minor face end of unequal angle as claimed in claim 3 is characterized in that,
Also has guide portion, described guide portion is in the transport path that has passed through the described unequal angle that rolls operation or finish rolling operation in described, be configured in upstream side with respect to described forming rolls, retrain described unequal angle long limit the end and carry out the guiding of described unequal angle to described forming rolls.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011006687 | 2011-01-17 | ||
| JP2011-006687 | 2011-01-17 | ||
| PCT/JP2012/050668 WO2012140923A1 (en) | 2011-01-17 | 2012-01-16 | Method for molding short-side end of unequal angle steel and device therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103249501A true CN103249501A (en) | 2013-08-14 |
| CN103249501B CN103249501B (en) | 2015-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280004057.8A Active CN103249501B (en) | 2011-01-17 | 2012-01-16 | The manufacturing process of the minor face end of unequal angle and device thereof |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5884498B2 (en) |
| KR (1) | KR101495628B1 (en) |
| CN (1) | CN103249501B (en) |
| WO (1) | WO2012140923A1 (en) |
Cited By (3)
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|---|---|---|---|---|
| CN109530430A (en) * | 2018-11-21 | 2019-03-29 | 重庆高科异型材制造有限公司 | A kind of production technology of dipstick and milling train for the technique |
| CN111318572A (en) * | 2018-12-13 | 2020-06-23 | 新疆八一钢铁股份有限公司 | Novel angle steel rolling hole type manufacturing method |
| CN113165034A (en) * | 2018-12-27 | 2021-07-23 | 杰富意钢铁株式会社 | Long-side front end surface forming device, long-side front end surface forming method, long-side front end surface manufacturing method, and hot finish rolling equipment for unequal angle steel |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6158677B2 (en) * | 2013-10-18 | 2017-07-05 | Ｊｆｅスチール株式会社 | Method and apparatus for forming short side end of unequal angle iron |
| JP7501853B2 (en) | 2019-09-11 | 2024-06-18 | Ｊｆｅスチール株式会社 | Equipment for forming short side ends of unequal angle iron |
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- 2012-01-16 JP JP2012006548A patent/JP5884498B2/en active Active
- 2012-01-16 WO PCT/JP2012/050668 patent/WO2012140923A1/en active Application Filing
- 2012-01-16 KR KR1020137015188A patent/KR101495628B1/en active IP Right Grant
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109530430A (en) * | 2018-11-21 | 2019-03-29 | 重庆高科异型材制造有限公司 | A kind of production technology of dipstick and milling train for the technique |
| CN109530430B (en) * | 2018-11-21 | 2020-10-27 | 重庆高科异型材制造有限公司 | Production process of depth measuring ruler |
| CN111318572A (en) * | 2018-12-13 | 2020-06-23 | 新疆八一钢铁股份有限公司 | Novel angle steel rolling hole type manufacturing method |
| CN113165034A (en) * | 2018-12-27 | 2021-07-23 | 杰富意钢铁株式会社 | Long-side front end surface forming device, long-side front end surface forming method, long-side front end surface manufacturing method, and hot finish rolling equipment for unequal angle steel |
| CN113165034B (en) * | 2018-12-27 | 2023-08-18 | 杰富意钢铁株式会社 | Device for forming long-side front end surface of unequal angle steel, method for forming long-side front end surface, method for manufacturing same, and hot finish rolling equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5884498B2 (en) | 2016-03-15 |
| CN103249501B (en) | 2015-09-02 |
| KR101495628B1 (en) | 2015-02-25 |
| WO2012140923A1 (en) | 2012-10-18 |
| JP2012161841A (en) | 2012-08-30 |
| KR20130086638A (en) | 2013-08-02 |
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