CN112845620A - Simple method for determining head and tail ruler-setting amount based on different compression ratios - Google Patents
Simple method for determining head and tail ruler-setting amount based on different compression ratios Download PDFInfo
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- CN112845620A CN112845620A CN202110271184.5A CN202110271184A CN112845620A CN 112845620 A CN112845620 A CN 112845620A CN 202110271184 A CN202110271184 A CN 202110271184A CN 112845620 A CN112845620 A CN 112845620A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/72—Rear end control; Front end control
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Abstract
The invention discloses a simple method for determining the head and tail ruler placing amount based on different compression ratios, and belongs to the technical field of metal processing. The simple method for determining the head and tail measuring tape quantities based on different compression ratios correspondingly gives different head and tail measuring tape quantities according to different compression ratios in the slab longitudinal rolling stage, and specifically comprises the following steps: (1) determining the compression ratio of the slab in the longitudinal rolling stage; (2) determining the head and tail ruler placing quantity: the formula for calculating the head and tail ruler placing quantity is as follows: l = K × 100mm, wherein L is the length of the head and the tail, and K is the compression ratio. The simple method for determining the head and tail scale releasing amount based on different compression ratios correspondingly sets different head and tail scale releasing amounts according to different compression ratios in the longitudinal rolling stage of the plate blank, solves the problem that the determination standard of the head and tail arc scale releasing amount is unreasonable and non-uniform in the design of the current plate blank, and can effectively reduce the raw material waste in the production process of the middle plate, reduce the blank using amount and improve the yield by 0.5 percent.
Description
Technical Field
The invention relates to a simple method for determining the head and tail ruler placing amount based on different compression ratios, and belongs to the technical field of metal processing.
Background
With the progress of society and the development of steel enterprises, the requirements on the control of production cost are more and more stringent. The yield is taken as a very important economic index, and how to optimize and promote the yield is very important. In the current slab design process, the length standard of the head and tail ruler at different compression ratios is a fixed value.
However, the conventional material type design principle has the following defects, which causes huge waste of the slab raw materials and is not beneficial to reducing the production cost. The reason is that: the actual sizes of the head and tail arcs of the rolled steel plates are different under different compression ratios. The head and tail ruler placing amount can not be adjusted correspondingly according to the difference of the rolling piece compression ratio.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects of the prior art, improving the yield and providing a simple method for determining the head and tail sizing based on different compression ratios.
The technical scheme provided by the invention for solving the technical problems is as follows: a simple method for determining the head and tail ruler-releasing quantity based on different compression ratios is characterized in that different head and tail ruler-releasing quantities are correspondingly given according to different compression ratios in the slab longitudinal rolling stage, and the method specifically comprises the following steps:
(1) determining the compression ratio of the slab longitudinal rolling stage:
for a full longitudinal rolled steel plate, the calculation formula of the compression ratio in the longitudinal rolling stage of a plate blank is as follows: k = H/H, wherein K is the compression ratio, H is the slab thickness, and H is the rolled steel plate thickness;
for the transverse and longitudinal rolled expanded steel plate, the compression ratio calculation formula in the longitudinal rolling stage of the plate blank is as follows: k = W/h, wherein K is a compression ratio, W is the thickness of the widened plate blank, and h is the thickness of the rolled steel plate;
(2) determining the head and tail ruler placing quantity:
the formula for calculating the head and tail ruler placing quantity is as follows: l = K × 100mm, wherein L is the length of the head and the tail, and K is the compression ratio.
The technical scheme of the invention is further defined as follows: the step (1) of determining the compression ratio of the full-longitudinally rolled steel plate specifically comprises the following steps:
A. measuring the thickness H of the plate blank;
B. determining the thickness h of the rolled steel plate according to production requirements;
C. calculating the compression ratio of the slab longitudinal rolling stage: k = H/H.
The technical scheme of the invention is further defined as follows: the step (1) of determining the compression ratio of the transversely and longitudinally rolled expanded steel plate specifically comprises the following steps:
a. widening the plate blank according to the production requirement;
b. measuring the thickness W of the widened plate blank;
c. determining the thickness h of the rolled steel plate according to production requirements;
d. calculating the compression ratio of the slab longitudinal rolling stage: k = W/h.
The invention has the beneficial effects that:
the simple method for determining the head and tail scale releasing amount based on different compression ratios correspondingly sets different head and tail scale releasing amounts according to different compression ratios in the longitudinal rolling stage of the plate blank, solves the problem that the determination standard of the head and tail arc scale releasing amount is unreasonable and non-uniform in the design of the current plate blank, and can effectively reduce the raw material waste in the production process of the middle plate, reduce the blank using amount and improve the yield by 0.5 percent.
Detailed Description
Example 1
According to the simple method for determining the head and tail sizing based on different compression ratios, different head and tail sizing amounts are correspondingly given according to different compression ratios in the slab longitudinal rolling stage, and the method specifically comprises the following steps:
(1) determining the compression ratio of the slab longitudinal rolling stage:
for a full longitudinal rolled steel plate, the calculation formula of the compression ratio in the longitudinal rolling stage of a plate blank is as follows: k = H/H, wherein K is the compression ratio, H is the slab thickness, and H is the rolled steel plate thickness; the method for determining the compression ratio of the full-longitudinal-rolled steel plate comprises the following steps:
A. measuring the thickness H of the plate blank;
B. determining the thickness h of the rolled steel plate according to production requirements;
C. calculating the compression ratio of the slab longitudinal rolling stage: k = H/H;
for the transverse and longitudinal rolled expanded steel plate, the compression ratio calculation formula in the longitudinal rolling stage of the plate blank is as follows: k = W/h, wherein K is a compression ratio, W is the thickness of the widened plate blank, and h is the thickness of the rolled steel plate; the compression ratio determining step of the transverse and longitudinal rolling widening steel plate specifically comprises the following steps:
a. widening the plate blank according to the production requirement;
b. measuring the thickness W of the widened plate blank;
c. determining the thickness h of the rolled steel plate according to production requirements;
d. calculating the compression ratio of the slab longitudinal rolling stage: k = W/h;
(2) determining the head and tail ruler placing quantity:
the formula for calculating the head and tail ruler placing quantity is as follows: l = K × 100mm, wherein L is the length of the head and the tail, and K is the compression ratio.
In practical application, for a full longitudinally rolled steel plate, when the specification of the plate blank is 220 × 2085 × 2700mm (thickness 220 mm, width 2085mm, length 2700 mm), the order specification of 10 × 2085mm (thickness 10mm, width 2085 mm) is rolled, the compression ratio is 22, and the head and tail sizing amount is given as 22 × 100mm =2200 mm. The slab specification was 220 x 2085 x 2700mm, the rolling order specification was 50 x 2085mm, the compression ratio was 4.4, and the head and tail sizing was given as 4.4 x 100mm =440 mm.
In the simple method for determining the head and tail sizing based on different compression ratios provided by the embodiment, in actual application, for a transversely and longitudinally rolled expanded steel plate, the slab specification is 220 × 2085 × 2700, the rolling specification is 10 × 2585mm (thickness is 10mm, width is 2585 mm) order specification, after the expansion is completed, the blank thickness is 220 × 2085/2585=177.4mm, the actual compression ratio is 177.4/10=17.4, and the head and tail sizing is 17.4 × 100mm =1740 mm. The slab gauge was 220 × 2085 × 2700, the rolled gauge was 50 × 2585mm order gauge, and after widening, the billet thickness was 220 × 2085/2585=177.4mm, the actual reduction ratio was 177.4/50=3.548, and the head and tail sizing was given as 3.548 × 100mm =354.8 mm.
According to the simple method for determining the head and tail arc sizing based on different compression ratios, provided by the embodiment, the head and tail arc sizing based on different compression ratios is found according to the tracking summary of a large amount of data on site, the head and tail arc sizing based on the steel plate is in a direct proportion relation with the compression ratio of the longitudinal rolling stage, and the head and tail arc sizing based on the data recording and accumulation on site is found to be the compression ratio of 100 mm.
The simple method for determining the head and tail scale releasing amount based on different compression ratios correspondingly sets different head and tail scale releasing amounts according to different compression ratios in the longitudinal rolling stage of the plate blank, solves the problem that the determination standard of the head and tail arc scale releasing amount is unreasonable and non-uniform in the design of the current plate blank, and can effectively reduce the raw material waste in the production process of the middle plate, reduce the blank using amount and improve the yield by 0.5 percent. According to the method, 200 ten thousand tons of steel plates are rolled in our factory, the yield is improved by 0.5 percent, and the benefit is 2000000 x 0.5 percent x 2000 = 2000 ten thousand yuan.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (3)
1. A simple method for determining the head and tail ruler-placing amount based on different compression ratios is characterized in that: according to the difference of the compression ratio of the slab longitudinal rolling stage, correspondingly setting different head and tail ruler placing quantities, and specifically comprising the following steps:
(1) determining the compression ratio of the slab longitudinal rolling stage:
for a full longitudinal rolled steel plate, the calculation formula of the compression ratio in the longitudinal rolling stage of a plate blank is as follows: k = H/H, wherein K is the compression ratio, H is the slab thickness, and H is the rolled steel plate thickness;
for the transverse and longitudinal rolled expanded steel plate, the compression ratio calculation formula in the longitudinal rolling stage of the plate blank is as follows: k = W/h, wherein K is a compression ratio, W is the thickness of the widened plate blank, and h is the thickness of the rolled steel plate;
(2) determining the head and tail ruler placing quantity:
the formula for calculating the head and tail ruler placing quantity is as follows: l = K × 100mm, wherein L is the length of the head and the tail, and K is the compression ratio.
2. The simple method for determining the head and tail sizing based on different compression ratios according to claim 1, is characterized in that: the step (1) of determining the compression ratio of the full-longitudinally rolled steel plate specifically comprises the following steps:
A. measuring the thickness H of the plate blank;
B. determining the thickness h of the rolled steel plate according to production requirements;
C. calculating the compression ratio of the slab longitudinal rolling stage: k = H/H.
3. The simple method for determining the head and tail sizing based on different compression ratios according to claim 1, is characterized in that: the step (1) of determining the compression ratio of the transversely and longitudinally rolled expanded steel plate specifically comprises the following steps:
a. widening the plate blank according to the production requirement;
b. measuring the thickness W of the widened plate blank;
c. determining the thickness h of the rolled steel plate according to production requirements;
d. calculating the compression ratio of the slab longitudinal rolling stage: k = W/h.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302109A (en) * | 2013-06-13 | 2013-09-18 | 南京钢铁股份有限公司 | Method for controlling head and tail size amplifying rates dynamically based on different width expansion ratios |
| CN103386419A (en) * | 2013-07-15 | 2013-11-13 | 莱芜钢铁集团有限公司 | Method for controlling head-to-tail width of high broadening ratio steel plate |
| CN104289517A (en) * | 2014-09-23 | 2015-01-21 | 南京钢铁股份有限公司 | Production method for off-line subdividing plate s |
| CN112329198A (en) * | 2020-09-25 | 2021-02-05 | 南京钢铁股份有限公司 | Data-driven method for optimizing length of wide and thick plate in scale-up mode |
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- 2021-03-12 CN CN202110271184.5A patent/CN112845620A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302109A (en) * | 2013-06-13 | 2013-09-18 | 南京钢铁股份有限公司 | Method for controlling head and tail size amplifying rates dynamically based on different width expansion ratios |
| CN103386419A (en) * | 2013-07-15 | 2013-11-13 | 莱芜钢铁集团有限公司 | Method for controlling head-to-tail width of high broadening ratio steel plate |
| CN104289517A (en) * | 2014-09-23 | 2015-01-21 | 南京钢铁股份有限公司 | Production method for off-line subdividing plate s |
| CN112329198A (en) * | 2020-09-25 | 2021-02-05 | 南京钢铁股份有限公司 | Data-driven method for optimizing length of wide and thick plate in scale-up mode |
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Application publication date: 20210528 |