CN208555508U - A kind of pass of hot rolled circular steel - Google Patents
A kind of pass of hot rolled circular steel Download PDFInfo
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- CN208555508U CN208555508U CN201821108250.7U CN201821108250U CN208555508U CN 208555508 U CN208555508 U CN 208555508U CN 201821108250 U CN201821108250 U CN 201821108250U CN 208555508 U CN208555508 U CN 208555508U
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- pass
- round
- roll gap
- round steel
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Abstract
The utility model discloses a kind of passes of hot rolled circular steel, and including basic circle and positioned at the width expansion portion of basic circle two sides, the width expansion portion has the straight line expansion segment tangent with the basic circle；Wherein, the base circle diameter (BCD) D is round steel nominal diameter1.010~1.013 times；The angle of flare θ of straight line expansion segment is 10 °~20 °；Roll gap S is 3~6mm；Round radius r is 3~5mm.The pass is expanded in such a way that straight line and basic circle are tangent, and has done reasonable restriction to base circle diameter (BCD), the angle of flare, roll gap and round radius, so that it effectively promotes the precision of rolling with lesser ovality.
Description
Technical field
The utility model belongs to steel rolling field, and in particular to a kind of pass of hot rolled circular steel.
Background technique
When rolling different size round steel, select suitable pass particularly important.Whether hole type design is reasonable, directly affects
To the quality of product, mill production capacity, product cost and and operating condition etc..
At present the hole type design of round steel due to ovality it is larger, be not able to satisfy the high-precision requirement of hot rolled circular steel, need weight
Newly design a kind of pass.
Utility model content
Purpose of utility model: in order to overcome the drawbacks of the prior art, the utility model provides a kind of hole of hot rolled circular steel
Type, the pass have lesser ovality, can be improved the precision of milling round steel.
Technical solution: a kind of pass of hot rolled circular steel, including basic circle and positioned at the width expansion portion of basic circle two sides, the width
Spending enlarged portion has the straight line expansion segment tangent with the basic circle；
Wherein, the base circle diameter (BCD) D is round steel nominal diameter1.010~1.013 times；The angle of flare θ of straight line expansion segment
It is 10 °~20 °；Roll gap S is 3~6mm；Round radius r is 3~5mm.
Specifically, the pass is for rolling nominal diameter when angle of flare θ is 15 °For the round steel of 40~200mm, Neng Gouqu
Obtain lesser ovality, higher precision.
In order to further obtain smaller ovality, for the round steel of different nominal diameters, different groups should be corresponded to away from taking
Value.Specifically, when round steel nominal diameter isWhen, group is away from value are as follows: roll gap S=3mm, round radius
R=3mm；When round steel nominal diameter isWhen, group is away from value are as follows: roll gap S=4mm, round radius r
=4mm；When round steel nominal diameter isWhen, group is away from value are as follows: roll gap S=6mm, round radius r
=5mm.Obtained last groove has smaller ovality range, further promotes the rolling accuracy of round steel.
The utility model has the advantages that the width expansion portion of the pass of the utility model has the straight line expansion segment tangent with basic circle, and right
Base circle diameter (BCD), the angle of flare, roll gap and round radius have done reasonable restriction, so that the ovality of the pass is smaller, while right
Than the prior art, the amount of rolling of the pass is able to maintain stabilization, ensure that rolling cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model pass；
Fig. 2 is the process schematic for constructing pass；
Fig. 3 is to be counted in embodiment using the utility model pass ovality；
Fig. 4 is the ovality statistical data of the prior art in embodiment；
Fig. 5 is the schematic diagram that the pass of 60mm round steel is rolled in embodiment；Wherein, roll gap S=3mm, round radius r=
3mm；
Fig. 6 is the pass schematic diagram of existing rolling 60mm round steel；
Fig. 7 is the schematic diagram that the pass of 60mm round steel is rolled in embodiment；Wherein, roll gap S=4mm, round radius r=
4mm；
Fig. 8 is the schematic diagram that the pass of 60mm round steel is rolled in embodiment；Wherein, roll gap S=5mm, round radius r=
4mm；
Fig. 9 is the schematic diagram that the pass of 60mm round steel is rolled in embodiment；Wherein, roll gap S=6mm, round radius r=
4mm；
Figure 10 is the schematic diagram that the pass of 60mm round steel is rolled in embodiment；Wherein, roll gap S=6mm, round radius r
=5mm.
Specific embodiment
In the following, being described in further details in conjunction with attached drawing to the utility model.
As shown in Figure 1, a kind of pass of hot rolled circular steel, described including basic circle 1 and positioned at the width expansion portion of basic circle two sides
Width expansion portion have the straight line expansion segment 2 tangent with the basic circle 1, the bull nose section 3 that is connect with straight line expansion segment 2 and with
The roll gap line 4 that bull nose section 3 connects.Expansion for the ovality for reducing the groove rolling round steel, to base circle diameter (BCD), straight line expansion segment
The size of subtended angle, roll gap and round radius is defined below: base circle diameter (BCD)Wherein,
It is the nominal diameter of round steel；Angle of flare θ is 10 °~20 °；Roll gap S is 3~6mm；Round radius r is 3~5mm.
Constructing the pass is for rolling nominal diameterFor the round steel of 40~200mm.The study found that when angle of flare θ is
At 15 °, the ovality of the round steel of groove rolling can be further decreased.And further further investigate, discovery is for rolling different public affairs
The round steel for claiming diameter selects different groups away from value, though ovality has reduction compared with prior art, different groups reduce away from value
Amplitude it is different.Specifically, in order to obtain smaller ovality, when round steel nominal diameter is
When, group is away from value: roll gap S=3mm, round radius r=3mm；When round steel nominal diameter isWhen,
Group is away from value: roll gap S=4mm, round radius r=4mm；When round steel nominal diameter isWhen, group
Away from value: roll gap S=6mm, round radius r=5mm.
As shown in Fig. 2, the present embodiment additionally provides a kind of method using the AutoCAD software building pass, including such as
Lower step: (1) roll gap center line 5 is first determined；
(2) two straight lines 6, two straight lines 6 and roll gap center line are done by starting point of any point A of roll gap center line
5 angle is respectively θ 1=90 °-θ and θ 2=-90 °+θ；
(3) according to the nominal diameter of milling round steelIt determines base circle diameter (BCD) D, obtains base radius R=1/2D；
(4) it is done using R as radius while being tangential on the circle of two straight lines 5 to get basic circle；
(5) according to the nominal diameter of round steelDetermine roll gap S, then the 1/2S above and below roll gap center line respectively
Roll gap line 4 is drawn to get roll gap in place；
(6) according to the nominal diameter of round steelRound radius r is determined, then using circular arc chamfering drafting roll gap line 4 and directly
The bull nose of line 6；
(7) vertical line of roll gap center line 5, and the figure mirror image drawn with vertical line to above-mentioned steps are done in basic circle the center point,
Up to pass.
As shown in Figure 3 and Figure 4, existSection in choose multiple nominal diameters, using the structure of the present embodiment
The last groove that 50 groups of construction method actual configuration.Meanwhile as a comparison case by 50 groups of last grooves of existing method actual configuration.
Statistics lot of experimental data simultaneously compares, the ovality that the last groove of existing method counts in 0.67~1.00mm,
Mean value is 0.69mm, and the ovality that the last groove of the utility model counts is in 0.15~0.39mm, mean value 0.27mm.
There is significant advantage in the control of ovality by the last groove that the data of statistics can be seen that the utility model.
Embodiment 2: as shown in Figure 5 and Figure 6, for rollingFor the round steel of 60mm, the pass of the utility model is constructed,
Base circle diameter (BCD) D is 60.8mm, and angle of flare θ is 15 °, since nominal diameter is So roll gap S=3mm,
Round radius r=3mm.The theoretical maximum of the pass having a size of 60.95~61.4mm, theoretical ellipse degree is 0.15~
0.60mm.It is compared with the pass of existing method, the optimal value of theoretical ellipse degree is reduced to 0.15mm by 0.66mm.Specific comparison
It is shown in Table 1:
The comparison of 1 60mm round steel different shaped jet holes of table
The construction method for further using the present embodiment chooses different groups away from choosing different roll gap and bull nose half
The pass of diameter combination building, is shown in Table 2:
2 60mm round steel difference roll gap of table and the comparison of round radius pass
By upper Biao Ke get, whenWhen for 60mm, the theory of roll gap S=3mm, round radius r=3mm, the pass of building are ellipse
The optimal value of circularity is minimum, and smaller with the range of other groups theoretical ellipse degree away from compared with, it is seen that using S=3mm, r=3mm
The index of the ovality of 60mm round steel pass of the group away from building is more excellent.
Further choose respectivelyFor 40mm, 50mm, 62,79mm, 80mm, 100mm, 120mm, 135mm, 149mm,
150mm, 180mm and 200mm, and the pass of the utility model is constructed, the combination of simultaneous selection difference roll gap and round radius
It compares, is concluded that by test data when round steel nominal diameter isWhen, it is selected when constructing pass
Roll gap S=3mm, the ovality that round radius r=3mm is obtained are smaller；When round steel nominal diameter is
When, roll gap S=4mm is selected when constructing pass, the ovality that round radius r=4mm is obtained is smaller；When round steel nominal diameter is When, roll gap S=6mm is selected when constructing pass, the ovality that round radius r=5mm is obtained is more
It is small.Meanwhile the precision of rolling is also further promoted.
Claims (5)
1. a kind of pass of hot rolled circular steel, which is characterized in that including basic circle (1) and be located at basic circle (1) two sides width expansion portion,
The width expansion portion has the straight line expansion segment (2) tangent with the basic circle (1)；
Wherein, basic circle (1) the diameter D is round steel nominal diameter1.010~1.013 times；The expansion of straight line expansion segment (2)
Angle θ is 10 °~20 °；Roll gap S is 3~6mm；Bull nose (3) radius r is 3~5mm.
2. the pass of hot rolled circular steel according to claim 1, which is characterized in that the angle of flare θ is 15 °, and the pass
For rolling nominal diameterFor the round steel of 40~200mm.
3. the pass of hot rolled circular steel according to claim 2, which is characterized in that when round steel nominal diameter isWhen, roll gap S=3mm, round radius r=3mm.
4. the pass of hot rolled circular steel according to claim 2, which is characterized in that when round steel nominal diameter isWhen, roll gap S=4mm, round radius r=4mm.
5. the pass of hot rolled circular steel according to claim 2, which is characterized in that when round steel nominal diameter isWhen, roll gap S=6mm, round radius r=5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821108250.7U CN208555508U (en) | 2018-07-12 | 2018-07-12 | A kind of pass of hot rolled circular steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821108250.7U CN208555508U (en) | 2018-07-12 | 2018-07-12 | A kind of pass of hot rolled circular steel |
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| Publication Number | Publication Date |
|---|---|
| CN208555508U true CN208555508U (en) | 2019-03-01 |
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ID=65492006
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821108250.7U Active CN208555508U (en) | 2018-07-12 | 2018-07-12 | A kind of pass of hot rolled circular steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620437A (en) * | 2018-07-12 | 2018-10-09 | 南京钢铁股份有限公司 | A kind of pass and its construction method of hot rolled circular steel |
-
2018
- 2018-07-12 CN CN201821108250.7U patent/CN208555508U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620437A (en) * | 2018-07-12 | 2018-10-09 | 南京钢铁股份有限公司 | A kind of pass and its construction method of hot rolled circular steel |
| CN108620437B (en) * | 2018-07-12 | 2024-04-16 | 南京钢铁股份有限公司 | Pass of hot rolled round steel and construction method thereof |
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